A vibration damping bush capable of flexing during assembly and lockable with a fixing tab

Abstract

The invention relates to a vibration damping bush (1); which enters into the housing (A) by flexing during assembly with the help of the mounting gaps (50) it contains, and which remains fixed in the place where it is mounted during operation by locking thanks to the fixing tabs (40) located on the outer shell (30) made of rigid material.

Description

[0001] A VIBRATION DAMPING BUSH CAPABLE OF FLEXING DURING ASSEMBLY AND LOCKABLE WITH A FIXING TAB

[0002] Technical Field

[0003] The invention relates to a vibration damping bush that remains fixed in the place where it is mounted during operation.

[0004] More specifically, the invention relates to a vibration damping bush; which is used in systems requiring vibration damping, which enters into the housing by flexing during assembly with the help of the mounting gaps it contains, and which remains fixed in the place where it is mounted during operation by locking thanks to the fixing tabs located on the outer shell made of rigid material.

[0005] State of the Art

[0006] Vibration damping bushes are components located in the damping / suspension system in motor vehicles. These components are used to increase driving comfort by absorbing vibrations and impacts, to reduce noise, and to ensure the distribution of loads acting on the chassis. Vibration damping bushes are generally produced from elastic materials such as rubber or polyurethane and have a structure reinforced with plastic, composite, or metal components.

[0007] Primarily in vehicles, vibration damping bushes are used to reduce vibrations in all mechanical elements having a vibration source. While these bushes allow multiple elements to come together by being located at vibration sources, they also minimize the transmission of vibration, impact, and noise.

[0008] Different configurations in vibration damping bushes are optimized according to various usage scenarios and vehicle / machine types. Solid rubber bushes, polyurethane bushes, layered bushes, and metal composite bushes are widely used types. The mentioned various configurations have been developed to meet the different needs of vehicles and machines, and each has its own unique advantages and disadvantages.

[0009] Vibration damping bushes are generally placed into the housing via a pressing process. The outer diameter of the bush is configured to be larger than the inner diameter of the housing. During pressing, the bush is compressed and pushed into the housing thanks to the flexibility properties of its elastomeric material. This tight fit provides the initial mechanical connection required for the placement of the bush into the housing. A series of different mechanisms are used for the bush to remain fixed in the housing. In assembly by mechanical compression, it is ensured that the bush remains fixed through the tight fit occurring during the placement into the housing. Some bushes may have a flange protruding outside the housing or an expanded outer edge. In other configurations, adhesives or special binders are also used for the bush to bond more tightly to the housing. Some bushes contain a metal ring or sleeve on the outer part, and this metal structure ensures the bush remains more robustly in the housing. Another method, called geometric locking, is the creation of a mechanical locking effect in the housing thanks to serrated or grooved structures located on the outer surface of the bush.

[0010] Metallic composite bushes have a metal core and an elastomer configuration surrounding this core. In some configurations, a rigid body application surrounding the mentioned elastomer also exists. Although these applications show better mechanical and thermal resistance, due to the outer body being of a rigid structure, they are placed into the housing only by a mechanical compression process. In these types of configurations, the weakening of the bond between the elastomeric part and the metallic core of the bush over time, fatigue, vibrations, and impacts reduce the compression force applied by the bush to the housing, and this causes the bush to rotate or slip in the housing. Lock mechanisms present in other bush types are not used due to the rigid structure of the outer body.

[0011] CN220015907U discloses three types of vibration damping bushes. Among these vibration damping bushes, there are examples of having a rigid, two-part outer shell but having an elastomer outer shell not containing a fixing tab, and examples containing a fixing tab. The mentioned examples do not contain the rigid outer body providing high strength and the fixing tab elements providing high stability that exist in our present invention.

[0012] Considering the negative effects, the need for a vibration damping bush with a rigid outer body, which is ensured to remain in place with the help of a lock mechanism, has become evident.

[0013] Object and Brief Description of the Invention

[0014] An object of the invention is to provide a vibration damping bush that ensures the damping of vibration, impact, and noise acting on the chassis by being placed into a housing located in the damping / suspension system.

[0015] Another object of the invention is to provide a vibration damping bush showing high mechanical and thermal strength and having high stability and a long service life. A vibration damping bush for mounting to a housing located in a system having a vibration damping need; comprising at least one inner core, at least one flexible element and at least one outer shell components; damping the vibration in systems having a vibration damping need and remaining fixed in the place where it is mounted during operation, in order to ensure that the vibration damping bush having the outer shell made of rigid material passes into the housing by flexing and remains fixed by locking; comprising: at least one fixing tab made of rigid material, positioned on the upper tip portion of the outer shell, connected to the outer shell, and providing fixation by seating in the housing during assembly; and at least one mounting gap allowing the fixing tabs to enter inside the housing by allowing inward flexing via the approaching of the upper tip portion of the outer shell towards each other at a certain shell opening distance with respect to the horizontal axis of the vibration damping bush during assembly, and providing the assembly of the vibration damping bush to the housing without the outer shell and the fixing tabs being deformed via the moving away of the shell upper tip portions from each other upon the seating of the fixing tabs to the housing.

[0016] Brief Description of the Figures

[0017] Figure 1 provides a top-angled, side, perspective view of the components of the vibration damping bush in an exploded state.

[0018] Figure 2 provides a side, perspective view of the vibration damping bush.

[0019] Figure 3 provides a top-angled, side, perspective view belonging to an alternative configuration of the vibration damping bush.

[0020] Figure 4 provides a side view belonging to an alternative configuration of the vibration damping bush.

[0021] Figure 5 provides a top-angled, side, perspective view of the components belonging to an alternative configuration of the vibration damping bush in an exploded state.

[0022] Figure 6 provides a side, perspective view belonging to an alternative configuration of the vibration damping bush before being mounted to the housing.

[0023] Figure 7 provides a side, perspective view of the state of an alternative configuration of the vibration damping bush mounted to the housing. Reference Numerals

[0024] I Vibration damping bush

[0025] 10 Inner core

[0026] I I Inner core bend

[0027] 12 Inner core outer tip

[0028] 20 Flexible element

[0029] 21 Flexible element outer tip

[0030] 22 Flexible element inner tip

[0031] 23 Flexible element intermediate portion

[0032] 30 Outer shell

[0033] 31 First shell

[0034] 32 Second shell

[0035] 33 Relief

[0036] 34 Shell bend

[0037] 35 Shell inner tip

[0038] 36 Shell outer tip

[0039] 37 Upper tip

[0040] 40 Fixing tab

[0041] 50 Mounting gap

[0042] A Housing

[0043] A.1 First chamfer

[0044] A.2 Second chamfer

[0045] B Housing frame

[0046] C Bush pushing plate

[0047] Y Bush vertical axis

[0048] Detailed Description of the Invention

[0049] The invention relates to a vibration damping bush (1) placed into a housing (A) located in the damping / suspension system in vehicles, preventing vibration, impact, and noise during driving by working together with the other elements of the damping system, and providing stability.

[0050] As seen in Figure 1 and Figure 2, the vibration damping bush (1) basically comprises: at least one inner core made of metal material, providing structural integrity, which is configured in a solid or hollow structure; at least one flexible element (20) made of elastomer material, at least partially surrounding the inner core (10) in the bush vertical axis (Y) and assisting in vibration damping; at least one outer shell made of rigid (non-deformable against pressure, preferably made of plastic) material, surrounding at least a portion of the flexible element (20) in the bush vertical axis (Y), ensuring the vibration damping bush (1) remains in place in a housing (A) where it is placed, and consisting of at least one first shell (31) and at least one second shell (32) positioned mutually or configured in a monolithic structure; at least one fixing tab (40) positioned on the upper tip (37) of the outer shell (30) and configured to form a protrusion outward from the bush vertical axis (Y), in other words, towards the housing (A) to be mounted, ensuring the vibration damping bush (1) remains fixed by seating on a second chamfer (A.2) located in the housing (A) during assembly; at least one mounting gap (50) positioned between the upper tip (37) and shell bend (34) of the outer shell (30), ensuring the vibration damping bush (1) passes into the housing (A) by flexing towards its center during assembly.

[0051] In another of the invention; it comprises at least two fixing tabs (40) positioned mutually to each other on the upper tip (37) portion of the outer shell (30); and at least two mounting gaps (50) positioned mutually, corresponding to the middle alignment of said mutually positioned fixing tabs (40) and allowing the bush to enter the housing (A) by the tabs (40) approaching each other during assembly.

[0052] The vibration damping bush (1) is mounted to a housing (A), which is the inner cavity of a housing frame (B) of cylindrical structure located in the damping system, and one end thereof is configured such that the movable element seats.

[0053] The inner core (10) provides the structural integrity of the vibration damping bush (1) and the equal distribution of the incoming force, assisting in vibration damping (Figure 5). The inner core (10) is made of metal material; it is configured in a structure positioned at the center of the vibration damping bush (1), preferably having a certain wall thickness, being hollow or solid (Figure 5). In alternative configurations, an inner core outer tip (12) is configured by adding an inner core bend (11) to the inner core (10) from a place close to the surface where it will be mounted, creating a structure outward relative to the bush vertical axis (Y), in other words, by adding a cylinder and transition structure having a diameter larger than the diameter of the inner core (10). The flexible element (20) is one of the fundamental components for the vibration damping bush (1) to perform the damping process (Figure 5).

[0054] The flexible element (20) ensures damping by eliminating negative effects such as vibration, impact, and noise present between different components of the vehicle. The flexible element (20) is made of elastomer material and is configured in a cylindrical structure to at least partially surround the inner core (10) in the bush vertical axis (Y). The flexible element (20) is preferably configured to have a flexible element outer tip (21) configured in the form of a wide flange greater than the width of the flexible element (20) at one end, and flexible element inner tip (22) parts configured in the form of a wide flange greater than the width of the flexible element (20) at the other end. There is a flexible element intermediate portion (23) which seats in the mounting gap (50) located in the outer shell (30), ensures the vibration damping bush (1) passes into the housing (A) by flexing by being compressed during assembly, and ensures the vibration damping bush (1) remains fixed in the housing (A) by opening back when the assembly process is completed (Figure 5).

[0055] The outer shell (30) ensures the vibration damping bush (1) remains in the housing (A), is made of rigid (non-deformable under force) material, and is configured in the form of a cylinder surrounding a portion of the flexible element (20) in the bush vertical axis (Y). The outer shell (30) consists of a first shell (31) and a second shell (32) positioned mutually (Figure 3). The shells (31 , 32) are configured as semi-cylinders having a certain wall thickness, and preferably, there is an upper tip (37) at the upper end and a shell outer tip (36) at the other end. The flexible element inner tip (22) seats on the upper tip (37), and the flexible element outer tip (21) seats on the shell outer tip (36), and the structure is ensured to remain together by applying a vulcanization process. On the surfaces of the shells (31 , 32) seating on the housing frame (B), there are multiple reliefs (33) created in the form of a recess, preferably in a square or rectangular form, towards the center of the vibration damping bush (1) and providing weight reduction.

[0056] The fixing tab (40), positioned at a certain distance to the mounting gap (50) at the upper tip (37) of the outer shell (30) and configured to be a protrusion outward from the upper tip (37) relative to the bush vertical axis (Y), is among the main components ensuring the vibration damping bush (1) remains fixed in the housing (A). There is a second chamfer (A.2) in the housing (A) corresponding to the fixing tab (40), and the fixing tab (40) seats on said second chamfer (A.2) during assembly.

[0057] Between the mutually positioned shells (31 , 32), there is at least one mounting gap (50) extending from the shell bend (34) to the inner tip (35) located at the upper tip (37), structured as a gap configured in the form of a wedge, and where the flexible element intermediate portion (23) seats. Said mounting gap (50) closes during the mounting of the vibration damping bush (1) to the housing (A), ensuring it flexes towards the center of the vibration damping bush (1). The mounting gap (50) opens back when the assembly process is completed, ensuring the fixing tab (40) seats on the second chamfer (A.2) located in the housing (A), thereby allowing the vibration damping bush (1) to remain fixed in the housing (A).

[0058] The first process during the assembly of the vibration damping bush (1) is seating the fixing tab (40) onto the first chamfer (A.1) located at the entrance part of the housing (A) and pushing it towards the housing (A) with the help of a bush pushing plate (C) (Figure 6). The fixing tab (40) has a width greater than that of the housing (A), and during this process, a force towards the center of the vibration damping bush (1) emerges. The dual force applying pressure towards the housing (A) and the center of the vibration damping bush (1) forces the shells (31 , 32) to close upon each other. Since the fixing tabs (40) have a greater width than the shells (31 , 32), during assembly, while the inward-facing surfaces of the shells (31, 32), in other words, those that will seat in the housing (A), approach each other, the surfaces remaining on the outside, in other words, contacting the bush pushing plate (C), move away from each other. The flexible element intermediate portion (23) located in this mounting gap (50) is also compressed. Since the shells (31 , 32) are made of rigid material and show resistance against changing shape, the spacing and flexing margins provided by the mounting gap (50) are used for the vibration damping bush (1) to seat in the housing (A) without being deformed. Without said mounting gap (50), it is not possible to mount the vibration damping bush (1) having the rigid outer shell (30) to the housing (A).

[0059] When the vibration damping bush (1) takes its position inside the housing (A) with the force coming from the apparatus (C), the flexible element intermediate portion (23) forces the bush to open back; thus, the fixing tab (40) seats on the second chamfer (A.2) located in the housing (A), which has a width greater than the width of the housing and is configured to act as a bearing for the fixing tab (40), and the mounting gap (50) opens back, making the shells (31 , 32) parallel to the bush vertical axis (Y) again (Figure 5).

[0060] Thanks to the placement of the fixing tab (40) into the second chamfer (A.2) in the housing (A) by means of the mounting gap (50) and the flexible element intermediate portion (23), the vibration damping bush (1) having the rigid outer shell (30) is ensured to operate stably.

Claims

CLAIMS1. A vibration damping bush (1) for mounting to a housing (A) located in a system having a vibration damping need; comprising at least one inner core (10), at least one flexible element (20) and at least one outer shell (30) components; damping the vibration in systems having a vibration damping need and remaining fixed in the place where it is mounted during operation, characterized in that, in order to ensure that the vibration damping bush (1) having the outer shell (30) made of rigid material passes into the housing (A) by flexing and remains fixed by locking; it comprises: at least one fixing tab (40) made of rigid material, positioned on the upper tip (37) portion of the outer shell (30), connected to the outer shell (30), and providing fixation by seating in the housing (A) during assembly; and at least one mounting gap (50) allowing the fixing tabs (40) to enter inside the housing (A) by allowing inward flexing via the approaching of the upper tip (37) portion of the outer shell (30) towards each other at a certain shell opening distance with respect to the horizontal axis of the vibration damping bush (1) during assembly, and providing the assembly of the vibration damping bush (1) to the housing (A) without the outer shell (30) and the fixing tabs (40) being deformed via the moving away of the shell upper tip (37) portions from each other upon the seating of the fixing tabs (40) to the housing (A).

2. The vibration damping bush (1) according to Claim 1 , characterized in that it comprises an inner core (10) made of metal, having a certain wall thickness, configured to have a solid or hollow structure, and providing structural integrity.

3. The vibration damping bush (1) according to Claim 1 , characterized in that it comprises a flexible element (20) made of elastomer material, at least partially surrounding the inner core (10) in the bush vertical axis (Y), having flanges at its two ends to ensure preserving structural integrity and assisting in vibration damping, being of cylindrical structure, and providing vibration damping by working together with the inner core (10).

4. The vibration damping bush (1) according to Claim 3, characterized in that the flexible element (20) comprises at least one flexible element intermediate portion (23) seating in the mounting gap (50), being compressed by the inward flexing of the vibration damping bush (1) during assembly, and allowing the vibration damping bush (1) to remain fixed in the housing (A) byopening back when the assembly process is completed, thereby ensuring the fixing tab (40) seats on the second chamfer (A.2).

5. A vibration damping bush (1) according to Claim 1 , characterized in that it comprises at least one outer shell (30) having at least one first shell (31) and at least one second shell (32) made of rigid material, positioned mutually relative to the bush vertical axis (Y), surrounding the flexible element (20) in the bush vertical axis (Y), configured to have a semi-cylindrical structure, and ensuring the vibration damping bush (1) remains in the housing by seating in the housing (A) during assembly.

6. A vibration damping bush (1) according to Claim 1 , characterized in that it comprises at least two fixing tabs (40) configured to form a protrusion outward relative to the bush vertical axis (Y) from a point close to the upper tip (37) and the inner tip (35) at the part where the outer shell (30) seats on the housing frame (B) surface.

7. A vibration damping bush (1) according to Claim 6, characterized in that it comprises at least two fixing tabs (40) positioned mutually on the outer shell (30) upper tip (37) portion.

8. A vibration damping bush (1) according to Claim 1 , characterized in that it comprises at least two mounting gaps (50) starting from the shell bend (34) point located on the outer shell (30) and expanding up to the inner tip (35).

9. A vibration damping bush (1) according to Claim 1 or 8, characterized in that it comprises at least two mounting gaps (50) positioned mutually at a point close to the outer shell (30) upper tip (37) portion.

10. A vibration damping bush (1) according to Claim 1 , characterized in that it comprises multiple reliefs (33) positioned on the surface of said outer shell (30) seating on the housing frame (B), created in the form of a recess towards the center of the vibration damping bush (1), and providing savings from weight.

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