WO2024020658A1 - Arrangement introduced into a bicycle suspension fork for selective locking of shock absorption - Google Patents

Abstract

The present patent application envisages a bicycle suspension fork with selective locking of shock absorption, pertaining to the field of bicycle axle suspensions; more specifically it relates to a subassembly that locks the shock absorption, said subassembly being mounted within the hydraulic shaft of the suspension, on the upper end of the shaft that is fastened to the crown, comprising: an external regulator, a shaft cover, an internal regulator, a specific regulator nut, a regulator cover, fastening screws, a flow tube for draining the fluid, a sliding mass that functions as a valve for opening or closing the flow, a spring for supporting the sliding mass, a protective cover, a piston, sealing o-rings, a one-way flow valve, a valve spring and an elastic ring.

Description

"ARRANGEMENT INTRODUCED IN BICYCLE SUSPENSION FORK WITH SELECTIVE DAMPING LOCK"

Application field

[001] The present utility model patent has as its object a practical and innovative bicycle suspension fork model with selective damping locking, belonging to the field of bicycle axle suspensions, for use more precisely in bicycle front suspension, at the which was given an original constructive arrangement, with a view to improving its use and performance in relation to other models usually found on the market.

[002] The object of the present application comprises a device for bicycle suspension, the function of which is to selectively block the damping.

[003] The objective of the subassembly that blocks the damping is to prevent compression movement of the suspension due to forces that do not originate from impacts arising from terrain irregularities or impacts arising from riding style. Therefore, damping will only occur when forces enter the system from irregularities in the terrain or from jumps and maneuvers that generate impacts on the suspension fork.

[004] When the system adjustment is in the damping lock position, the suspension will not undergo compression movement, so that, when traveling on regular terrain, there will be no loss of energy for the cyclist due to the suspension functioning. However, when traveling over uneven terrain, when passing through an obstacle that causes an impact on the system, the unlocking so that the suspension cushions this impact.

[005] This technology aims to optimize the cyclist's performance, by reducing their energy expenditure, caused by the stabilization of the suspension which, due to the selective blocking of the damping, will not carry out unnecessary compression and extension movements, thus avoiding the dissipation of energy just from the cyclist's effort on the bike.

[006] For damping to occur and the consequent dissipation of energy by the compression and extension movement, there will need to be an effective impact on the suspension.

[007] It is also the objective of this application to present a model of bicycle suspension fork with selective damping lock, with low costs for its industrial feasibility, combined with the requirements of robustness, safety and utilitarian practicality, thus offering the consumer public, an additional option in the similar market that, unlike usual models, offers countless possibilities and benefits to its users, which will make it a model of great acceptance in the consumer market.

[008] Therefore, in the patent application in question, there is a device specially designed and developed to achieve enormous practicality and which brings great advantages, both in its use and in its manufacturing.

State of the art

[009] As is known, notably by experts in the field, in order to make driving the bicycle more comfortable and, above all, offering advantages in overcoming rough terrain, the industry is increasingly developing sophisticated suspension models for these vehicles.

[010] In this aspect and in order to clarify the state of the art, some patent documents can be cited that deal with devices with the same conceptual purposes, but without achieving the inventive merit and the differences now revealed, as follows below.

[011] Patent document US20070227844A1, entitled "BIKE SUSPENSION ASSEMBLY WITH INERTIA VALVE AND THRESHOLD-G" discloses a bicycle suspension assembly with an inertia valve. The inertia valve moves between its closed and open positions in response to at least one portion of the bicycle suspension assembly being subjected to upward acceleration above a predetermined threshold.

[012] Patent document EP 1 947 365 A1, entitled "INERTIA VALVE FOR A BICYCLE", discloses a device comprised of a shock absorber including a tube and a piston rod carrying a piston. The piston is configured for reciprocating movement within the tube. A floating piston or other type of accumulator is configured to move to accommodate fluid displaced due to successive portions of the piston rod entering the tube during compression of the shock absorber. The damper includes a valve and mechanism that uses the movement of the floating piston to move the valve between a first and second position.

[013] Patent document US7490705, entitled "BICLE SUSPENSION ASSEMBLY INCLUDING INERTIA VALVE AND GAS SPRING", discloses a suspension assembly that includes first and second telescopic tubular parts configured to come together during compression of the suspension assembly. The bicycle suspension assembly may include an air spring that tends to expand the bicycle suspension assembly.

[014] Patent document US8607942, entitled "SUSPENSION SHOCK ABSORBER WITH INERTIA VALVE AND USER ADJUSTABLE PRESSURE RELIEF", discloses a suspension shock absorber or suspension fork, including an inertia valve and a pressure relief feature which includes a rotary adjustment knob that allows the pressure relief threshold to be adjusted externally by the pilot during use and without the use of tools.

[015] Patent document US20070228690A1, entitled "BIKE FRONT SUSPENSION ASSEMBLY WITH INERTIA VALVE", discloses a bicycle front suspension assembly that may include upper and lower telescopic tubes defining an internal volume in which a damping tube containing an inertia valve is positioned. During compression, a piston rod from the bicycle's suspension assembly occupies a successively larger portion of the shock tube.

[016] Patent document US7699146, entitled "SUSPENSION SHOCK ABSORBER WITH INERTIA VALVE AND USER ADJUSTABLE PRESSURE RELIEF" discloses a shock absorber or suspension fork, including an inertia valve and a pressure relief feature that includes a rotary adjustment knob that allows the threshold of Pressure relief is adjusted externally by the pilot during use and without the use of tools.

[017] Patent document W02004079222A2, entitled "INERTIA VALVE SHOCK ABSORBER" discloses a shock absorber, including a valve movable between an open position and a closed position to selectively change the compression damping rate of the shock absorber. The valve may include a self-centering feature, which operates to keep the valve body centered about the valve shaft. The damper may also include a timer feature, which maintains the valve in an open position for a predetermined period of time after it is initially opened.

Deficiencies in the state of the art

[018] The major drawback of the objects disclosed in the patent documents described above lies in the fact that they are complex to manufacture and difficult to assemble and maintain, which is why they require specific tools and processes to achieve these purposes.

[019] Furthermore, its designs consider that the best operation is related to positioning the device as close as possible to the wheel axis, which, in fact, proves to be inadequate, as it causes unstable operation of the assembly, with oscillations caused by the wheel axle vibration.

Proposed solution

[020] It was with these inconveniences in mind that, after countless research and studies, the inventor, a person linked to the field, created and developed the object of the present patent, devising a bicycle suspension fork with selective locking of damping, in which not only the mechanical and functional qualities of its manufacture were considered, but also the shape, arrangement and location of its parts and components which, as they were positioned in a more appropriate way, brought an increase in efficiency, without entail any burden.

[021] Thus, the present patent was designed with the aim of obtaining a device with as few parts as possible, conveniently configured and arranged to allow the bicycle suspension fork with selective damping lock to perform its functions with unparalleled efficiency and versatility, without the inconveniences already mentioned.

Advantages provided by the subject matter of this patent application

• The main advantage is that the operation is related to the vibration of the suspension rods and the vibration of the hydraulic fluid, which are in the upper part of the suspension and are far from the wheel axis. This allows for more uniform operation, regardless of any small variation in the wheel axis;

• Another advantage is that the system has the flexibility to be used in different types of suspension, regardless of the geometry of the wheel axle fitting, as the device is positioned in the upper part of the suspension's hydraulic rod;

• Existing devices are complex to manufacture and difficult to assemble and maintain, requiring specific tools and processes to achieve these purposes.

The designs of state devices technique consider that the best operation is related to positioning the device as close as possible to the wheel axis, different from the initial concept of this invention;

• The object of this patent application has the advantage of having a more uniform operation, with fewer oscillations resulting from vibrations of the wheel axle;

• Simplicity of design for manufacturing;

• Simplicity and ease of assembly and disassembly;

• High durability, without the need for preventive maintenance;

• Simplicity of corrective maintenance, when necessary.

[022] When comparing the devices, it is evident that they present different concepts from the initial conception of the project to the manufacturing and assembly methodology of the components.

[023] It is therefore understandable that the device in question is extremely simple in its construction, and is therefore easy to implement, however, delivering excellent practical and functional results, given its innovative characteristics.

[024] Conceived with an innovative design, it results in a harmonious set, with a very peculiar and, above all, characteristic appearance, and, in addition to the constructive aspect, the model stands out for its versatility and ease of use.

Brief description of the layout drawings [025] To complement this description, In order to obtain a better understanding of the characteristics of the present utility model and in accordance with a preferred practical implementation of the device, attached to the description is a set of drawings, where, in an exemplified manner, although not limiting, the Following:

FIG. 1 - Shows a view of the suspension fork identifying the structural components and subassemblies of the damping system.

FIG. 2 - Shows a view of the components of the damping lock subassembly.

FIG. 3 - Shows a view detailing the upper components of the damping lock subassembly.

FIG. 4 - Shows a view detailing the lower components of the damping lock subassembly.

FIG. 5 - Shows a view of the operation of a suspension without blocking the damping, where you can see the representation of the hydraulic fluid (29).

FIG. 5A - Shows a view of the operation of a suspension without blocking the damping, where you can see the representation of the hydraulic fluid (29).

FIG. 6 - Shows a view of the damping blocking subassembly (6) adjusted to maintain full damping, allowing the hydraulic fluid to flow throughout the damping system.

FIG. 7 - Shows another view of the damping blocking subassembly (6), adjusted to maintain full damping, allowing the hydraulic fluid to flow throughout the damping system.

FIG. 8 - Shows a view of the hydraulic rod (2) of the extended suspension fork, with the damping system blocked by the damping locking subassembly (6), where you can see the representation of the hydraulic fluid (29) and the air volume ( 30).

FIG. 9 - Shows a view of the damping blocking subassembly (6), blocking the flow of hydraulic fluid and consequently blocking the compression movement of the suspension fork.

FIG. 10 - Shows a view of the blockage of hydraulic fluid flow occurring through the sliding mass (13), obstructing the passage of hydraulic fluid through the transverse circular hole (12D) of the flow tube (12).

FIG. 1 1 - Shows a view of the sliding mass (13) in position below the transverse circular hole (12D) of the flow tube (12), releasing the passage of hydraulic fluid.

FIG. 12 - Shows a view of the hydraulic fluid passing through the transverse circular hole (12D) of the flow tube (12).

FIG. 13 - Shows a view of the hydraulic rod (2) in stationary condition, with the adjustment of the damping lock subassembly (6) positioned to maintain full damping, where you can see the representation of the hydraulic fluid (29) and the volume of air (30).

FIG. 14 - Shows a view of the unidirectional flow valve (17) during extension, allowing the hydraulic fluid to flow through the side holes of the piston (16).

FIG. 15 - Shows a view of the rod hydraulic fluid (2) of the suspension fork in compression movement, where you can see the representation of the hydraulic fluid (29) and the air volume (30).

FIG. 15A - Shows a view of the hydraulic rod (2) of the suspension fork in extension movement, where you can see the representation of the hydraulic fluid (29) and the air volume (30).

FIG. 15B - Shows a view of the hydraulic rod (2) of the suspension fork in stationary condition, where you can see the representation of the hydraulic fluid (29) and the air volume (30).

FIG. 16 - Shows a view of the flow of hydraulic fluid through the side holes of the piston (16) during the suspension extension movement with the sliding mass (13) blocking the passage of hydraulic fluid through the transverse circular hole (12D) of the flow tube ( 12).

FIG. 17 - Shows a view of the stationary condition of the hydraulic rod (2) of the suspension fork, when the damping blocking subassembly (6) is adjusted to block the damping and there is an impact that releases the hydraulic fluid flow to occur the damping.

FIG. 17A - Shows a view of the compression movement of the hydraulic rod (2) of the suspension fork, when the damping locking subassembly (6) is adjusted to lock the damping and an impact occurs that releases the flow of the hydraulic fluid so that damping occurs.

FIG. 17B - Shows a view of the extension movement of the hydraulic rod (2) of the suspension fork, when the damping lock subassembly (6) is adjusted to block the damping and an impact occurs that releases the flow of hydraulic fluid so that damping occurs.

FIG. 18 - Shows the hydraulic fluid flow that occurs in the damping blocking subassembly (6) through the linear movement of the sliding mass (13) over the flow tube (12), in the blocked flow condition.

FIG. 18A - Shows the flow of hydraulic fluid that occurs in the damping blocking subassembly (6) through the linear movement of the sliding mass (13) over the flow tube (12), in the unblocked flow condition, due to the impact.

FIG. 18B - Shows the flow of hydraulic fluid that occurs in the damping blocking subassembly (6) through the linear movement of the sliding mass (13) over the flow tube (12), in the blocking condition, after impact.

FIG. 19 - Shows a view of the adjustment of the damping locking subassembly (6), positioned in the condition to unlock the suspension compression with minor impacts, that is, a position in which the distance from the end of the sliding mass (13) is smaller in relation to to the holes in the flow tube (12).

FIG. 20 - Shows a view of the adjustment of the damping locking subassembly (6), positioned in the condition to unlock the suspension compression with larger impacts, that is, a position in which the distance from the end of the sliding mass (13) is greater in relation to to the holes in the flow tube (12).

FIG. 21 - Shows a detailed view of the damping locking subassembly (6), positioned to full damping.

FIG. 21 A - Shows a detailed view of the damping locking subassembly (6), positioned to unlock compression and consequently generate damping for smaller impacts.

FIG. 21 B - Shows a detailed view of the damping locking subassembly (6), positioned to unlock the damping with larger impacts.

FIG. 22 - Shows a perspective view of the damping lock subassembly (6), with the adjustment in the full damping position.

FIG. 23 - Shows a perspective view of the damping locking subassembly (6), with the adjustment in the locked position, to be unlocked with minor impacts.

FIG. 24 - Shows a perspective view of the damping locking subassembly (6), with the adjustment in the locked position, to be unlocked with greater impacts.

FIG. 25 - Shows an exploded top perspective view of the damping locking subassembly (6).

FIG. 26 - Shows a top perspective view of the internal regulator.

FIG. 27 - Shows an exploded bottom perspective view of the damping lock subassembly (6).

Detailed description of the layout

[026] In accordance with what is illustrated in the figures listed above, the "ARRANGEMENT INTRODUCED IN A BICYCLE SUSPENSION FORK WITH SELECTIVE LOCKING CUSHIONING", object of the present patent, integrates a suspension fork structure, which is composed of a monoblock (1), two rods, a crown (4) and an upper tube (20).

[027] Among the two rods, one rod is dedicated to the hydraulic components, called the hydraulic rod (2); and the other rod is dedicated to pneumatic components or spring components, called pneumatic rod or spring rod (3).

[028] The damping system is mounted inside the hydraulic rod and is composed of a damping subassembly (5), whose function is to dissipate energy, generating damping, and a subassembly whose function is to block of damping (6).

[029] The objective of the subassembly that blocks the damping (6) is to prevent compression movement of the suspension due to forces that do not originate from impacts arising from irregularities in the terrain or impacts arising from riding style. Therefore, damping will only occur when forces enter the system from irregularities in the terrain or from jumps and maneuvers that generate impacts on the suspension fork.

[030] This subset (6) has an adjustment that has the option of keeping the damping working fully, without blocking, or the option of blocking the damping and regulating the intensity of the force that will be necessary to unlock the damping; In other words, it is possible to adjust the sensitivity of the suspension to dampen minor impacts or just larger impacts.

[031] If the adjustment is in the position for If the damping is blocked, the suspension will be blocked for compression movement and when traveling on even terrain there will be no loss of energy for the cyclist due to the functioning of the suspension. However, when traveling over uneven terrain, when passing through an obstacle that causes an impact on the system, the system will be unlocked so that the suspension can cushion this impact.

[032] The objective of this technology is to optimize the cyclist's performance, by reducing their energy expenditure, caused by the stabilization of the suspension, so that it does not carry out unnecessary compression and extension movements, thus avoiding the dissipation of energy only with the cyclist's effort on the bicycle.

[033] All of the cyclist's motive energy on the bicycle is used to pedal and control the bicycle when there is no need for damping.

[034] For damping and consequent energy dissipation, an impact on the suspension will be necessary.

[035] The damping locking subassembly (6) is mounted inside the hydraulic rod (2) of the suspension, at the upper end of the rod that is fixed to the crown (4) and is composed of: an external regulator (7), a stem cover (8), an internal regulator (9), a specific adjustment nut (10), an adjustment cap (11), fixing screws (22) and (26), a flow tube (12) for fluid flow, a sliding mass (13) that functions as a valve to open and close the flow, a support spring (14) of the sliding mass (13), a protective cover (15), a piston (16), the -sealing rings (23), (24), (25) and (28), a one-way flow valve (17), a valve spring (18) and an elastic ring (19).

[036] In more detail, the damping block subassembly is comprised of a flow tube (12), which consists of a cylindrical tube provided with threads (12A) and (12B) on the external faces of the regions close to the ends, and next to the upper thread (12A) there is a transverse opening (12C) with an oblong vertical geometry and in half its height there is a circular transverse through hole (12D).

[037] Said flow tube (12) is surrounded in its upper portion by the regulation cover (11), which consists of a cylindrical tube equipped with a transverse circular opening (11 A) in its upper portion and a cutout transversal quadrangular (11 B) at its lower end.

[038] Said flow tube (12) is surrounded in its lower portion by the sliding mass (13), which consists of a cylindrical element, whose wall is greater in thickness than said adjustment cover (11), and internally has a larger diameter in its lower half, where a helical support spring (14) is positioned, which surrounds the lower portion of the flow tube (12), and the lower portion of said sliding mass (13) is externally surrounded by a protective cover (15).

[039] The lower end of said flow tube (12) receives a piston (16) and a one-way valve (17) followed by a coaxially positioned helical valve spring (18), which is retained by an elastic ring ( 19) affixed to the lower tubular segment (16B) of the piston (16). [040] Said flow tube (12) receives internally in its upper portion an adjustment nut (10), which consists of a tubular cylinder equipped with a transverse circular hole (10A) close to its lower end and is threaded in its upper end an internal regulator (9), consisting of a predominantly cylindrical element, which has a quadrangular conformation (9A) in its upper portion, followed below by a cylindrical region, equipped with a recess (9B), where it is allocated the o-ring (24). This quadrangular shape has on its upper face a circular coaxial hole (9C), equipped with a thread.

[041] The upper end of the flow tube (12) is mounted on the inner portion of the stem cap (8), which is followed above by an external regulator (7) in coaxial, which is crossed by a screw (22 ), which in turn is attached to the threaded hole (9C) of the internal regulator (9).

[042] Finally, the hole (10A) of the adjusting nut (10), the hole (11A) of the adjusting cap (11), and the transverse opening (12C) of the flow tube (12) are aligned and passed through the screw (26), which in turn receives the nut (27).

[043] Figure 1 illustrates the suspension fork identifying the structural components and subassemblies of the damping system.

[044] Figures 2, 3 and 4 illustrate the components of the damping blocking subassembly.

Assembly

[045] The external regulator (7) is mounted on the internal regulator (9) and fixed with a screw (22). [046] Both parts are mounted inside the stem cover (8) and sealed using sealing o-rings (23) and (24).

[047] The rod cover (8) is mounted on the upper end of the hydraulic rod (2) and sealed by a sealing o-ring (25).

[048] At the tip of the internal regulator (9) there is a thread on which the specific adjustment nut (10) is mounted.

[049] The specific adjustment nut (10) is inside the flow tube (12), which is mounted on the bottom of the stem cover (8).

[050] The adjustment cap (11) is mounted on the outer diameter of the flow tube (12), which is fixed using a screw (26) and a pressure nut (27) to the specific adjustment nut (10) .

[051] The screw passes through the hole (11A) of the adjustment cover (11), the transverse opening (12C) of the flow tube (12) and hole (10A) of the adjustment cover (10).

[052] In the flow tube (12) there is a transverse opening (12C) with an oblong vertical geometry through which the screw can move to raise and lower the adjustment cover (11).

[053] On the outer diameter of the flow tube

(12) below the adjustment cover (1 1) the sliding mass is mounted

(13) with controlled clearance for linear movement in relation to the flow tube (12).

[054] The support spring (14) of the sliding mass (13) is also mounted on the outer diameter of the flow tube (12). [055] The support spring (14) of the sliding mass (13) has one end supported on the internal diameter of the sliding mass (13) and the other end supported on the piston (16), supporting the sliding mass (13).

[056] The piston (16) is mounted on the lower end of the flow tube (12).

[057] On the outer diameter of the piston (16) there is a sealing o-ring (28) to seal the flow of hydraulic fluid through the sides of the piston (16) into the hydraulic rod (2) of the suspension.

[058] The unidirectional flow valve (17) and the valve spring (18) are mounted on the lower segment (16B) of the piston (16).

[059] The unidirectional flow valve (17) is supported by the valve spring (18) which has one end supported on the valve (17) and the other end supported on the elastic ring (19) which is fixed to the lower segment (16B) of the piston (16).

Simplified operation

[060] The hydraulic rod (2) of the suspension is a hydraulic fluid reservoir sealed at the upper end by the rod cover (8) and at the lower end by a hydraulic seal (21).

[061] Inside the hydraulic rod, the damping blocking subassembly (6) is mounted at the upper end and the damping subassembly (5) is mounted at the lower end, which is fixed to the lower end of the monoblock (1) and has a passage on the inner diameter of the hydraulic seal (21) of the hydraulic rod (2). [062] During the operation of a suspension without blocking the damping, the hydraulic rod (2) constantly remains in linear compression and extension movement within the monoblock (1).

[063] In this operating condition, during compression and extension of the hydraulic rod (2), the hydraulic fluid circulates inside the hydraulic rod (2), flowing through the damping subassembly (5) which is mounted inside the hydraulic rod (2) .

[064] The operation of a suspension without damping lock is illustrated in figures 5 and 5A.

[065] The damping lock subassembly (6), when adjusted to maintain full damping, allows hydraulic fluid to circulate within the hydraulic rod (2) to maintain the compression and extension movement of the suspension.

[066] Figures 6 and 7 illustrate the damping blocking subassembly (6), adjusted to maintain full damping, allowing the flow of hydraulic fluid throughout the damping system.

[067] The damping blocking subassembly (6), when adjusted to block the damping, does not allow the circulation of hydraulic fluid within the hydraulic rod (2), preventing the compression and extension movement of the suspension and consequently preventing there from being damping.

[068] Figure 8 illustrates the hydraulic rod (2) of the extended suspension fork, with the damping system blocked by the damping lock subassembly (6). [069] Figure 9 illustrates the damping blocking subassembly (6) blocking the flow of hydraulic fluid and consequently blocking the compression movement of the suspension fork. Figure 10 illustrates the blockage of hydraulic fluid flow occurring through the sliding mass (13), obstructing the passage of hydraulic fluid through the transverse circular orifice (12D) of the flow tube (12).

[070] In this adjustment condition, the damping lock subassembly (6) keeps the system locked until the suspension is subjected to an impact.

[071] When the suspension is subjected to an impact, the sliding mass (13) moves downwards, releasing the passage of hydraulic fluid through the transverse circular hole (12D) of the flow tube (12), which flows through the damping subassembly (5) dissipating the energy arising from this impact, generating damping.

[072] Figure 1 1 illustrates the sliding mass (13) in position below the transverse circular hole (12D) of the flow tube (12), releasing the passage of the hydraulic fluid.

[073] Figure 12 illustrates the passage of hydraulic fluid through the transverse circular hole (12D) of the flow tube (12).

[074] After cushioning the impact, the support spring (14) returns the sliding mass (13) to the blocking position, preventing the compression movement of the suspension until there is a new impact.

[075] Figures 9 and 10 illustrate the position in which the sliding mass (13) blocks the transverse circular hole (12D) of the flow tube (12).

Detailed operation of the system suspension fork damping with the damping lock subassembly adjusted to maintain full damping

[076] When the damping locking subassembly (6) is adjusted to maintain full damping, the adjustment cap (11) pushes the sliding mass (13) downwards, compressing the support spring (14), keeping the mass slider (13) positioned below the transverse circular hole (12D) of the flow tube (12).

[077] Figure 6 illustrates the adjustment of the damping blocking subassembly (6), positioned to maintain full damping.

[078] In this adjustment condition, the hydraulic fluid inside the hydraulic rod (2) can flow freely through the transverse circular hole (12D) of the flow tube (12), to circulate within the hydraulic rod (2).

[079] Figure 7 illustrates the free flow of hydraulic fluid through the transverse circular orifice (12D) of the flow tube (12), in the adjustment condition to maintain integral damping.

[080] When the suspension is extended in stationary condition, the hydraulic fluid fills the hydraulic rod reservoir (2) up to the level of the side holes, inside the flow tube (12).

[081] The remaining volume of the hydraulic rod reservoir (2) up to the rod cover (8) is filled with air without initial pressure.

[082] Figure 13 illustrates the hydraulic rod (2) in stationary condition, with the adjustment of the damping lock subassembly (6) positioned to maintain the full damping.

[083] When the suspension enters a compression movement, the hydraulic rod (2) slides into the monoblock (1).

[084] During compression, the damping locking subassembly (6), which is fixed to the rod cover (8) at the upper end of the hydraulic rod (2), approaches the damping subassembly (5), which is fixed at the lower end of the monoblock (1) and has linear movement through the hydraulic seal (21) of the hydraulic rod (2).

[085] This approximation between the subassemblies causes the hydraulic fluid to flow into the flow tube (12), through the central hole of the piston (16).

[086] During compression, the side holes of the piston (16) are closed by the unidirectional flow valve (17), which is supported by the valve spring (18).

[087] The force of the valve spring (18) keeps the valve closing the side holes of the piston (16), in stationary condition and also in compression.

[088] The unidirectional flow valve (17) does not allow hydraulic fluid to flow through the side holes of the piston (16) during compression, as the direction of flow in compression helps the valve spring (18) to keep the valve closing the piston holes (16).

[089] The fluid flows into the flow tube (12) through the central hole of the piston (16) and flows through the transverse circular hole (12D) of the flow tube (12), filling the upper volume of the hydraulic rod reservoir (2), which was filled with air. [090] Figure 6 illustrates the flow of hydraulic fluid through the transverse circular orifice (12D) of the flow tube (12), during the compression movement, with the adjustment of the damping lock subassembly (6) positioned to maintain damping integral.

[091] The proportion between the volume of hydraulic fluid and the volume of air inside the hydraulic rod reservoir (2) is sufficient for complete flow of the hydraulic fluid, resulting from the greatest compression movement, equivalent to the maximum damping stroke of the suspension, without there being a hydraulic stop.

[092] After the end of compression, the hydraulic fluid flows through the damping (5) and damping blocking subassemblies (6) and fills the volume of the upper reservoir of the hydraulic rod (2), which was filled with air. At this moment there is hydraulic fluid inside the flow tube (12) and on the outer sides of the flow tube (12) above the sealing o-ring (28) side of the piston (16), inside the hydraulic rod (2).

[093] When the suspension begins the extension movement, the hydraulic fluid that filled the upper volume of the hydraulic rod reservoir (2) flows in the opposite direction through the transverse circular hole (12D) of the flow tube (12) and the holes sides of the piston (16).

[094] The unidirectional flow valve (17) allows the flow of hydraulic fluid during extension, as the direction of flow in extension pushes the valve (17) downwards, compressing the valve spring (18) and releasing the flow passage. hydraulic fluid through the side holes of the piston (16).

[095] Figure 14 illustrates the unidirectional valve flow (17) during extension, allowing the hydraulic fluid to flow through the side holes of the piston (16).

[096] The hydraulic fluid passage through the side holes of the piston (16) remains open until the hydraulic fluid that was in the upper volume of the hydraulic rod reservoir (2) flows to the lower volume of the hydraulic rod reservoir (2), returning to the initial position it was in before compression.

[097] During the suspension extension movement, the hydraulic fluid also flows through the damping subassembly (5), generating the dissipation of the energy accumulated in compression and consequently the damping of the system.

[098] Figures 15, 15A and 15B illustrate the hydraulic rod (2) of the suspension fork, in compression, extension and in stationary condition.

[099] In this condition of adjusting the damping blocking subassembly (6) to maintain integral damping, the compression and extension movement occurs in any force situation on the suspension, including forces generated due to impacts arising from terrain irregularities and the forces generated by the cyclist on the bicycle. For any force imputed to the suspension, there will be a compression and extension movement to dissipate the energy and consequently damping.

Detailed operation of the suspension fork damping system with the damping lock sub-assembly set to lock the damping [100] When the damping lock sub-assembly damping (6) is adjusted to block the damping, the adjustment cap (11) positions the sliding mass (13) above the transverse circular hole (12D) of the flow tube (12), blocking the passage of the hydraulic fluid through this hole.

[101] For the compression movement of the suspension fork to occur, the hydraulic fluid necessarily needs to flow through the central hole of the piston (16), as the side holes of the piston (16) are obstructed by the unidirectional flow valve (17).

[102] For the hydraulic fluid to flow through the central hole of the piston (16), the transverse circular hole (12D) of the flow tube (12) must be unobstructed, so that the hydraulic fluid can flow to the upper reservoir of the rod. hydraulics (2).

[103] As long as the sliding mass (13) is blocking the transverse circular hole (12D) of the flow tube (12), the hydraulic fluid will not flow and there will be no compression movement of the suspension fork.

[104] Figure 9 illustrates the damping blocking subassembly (6), adjusted to block the damping.

[105] The sliding mass (13) remains in balance in this position, supported by the support spring (14).

[106] The force of the support spring (14) keeps the sliding mass (13) in balance, in the position above the transverse circular orifice (12D) of the flow tube (12).

[107] In this adjustment, the hydraulic fluid flow is blocked and there will be no movement of compression of the suspension until the sliding mass (13) slides down and unlocks the transverse circular hole (12D) of the flow tube (12).

[108] The suspension will remain extended until the sliding mass (13) starts moving and releases the hydraulic fluid passage.

[109] Figure 10 illustrates the blockage of hydraulic fluid flow occurring through the sliding mass (13), obstructing the passage of hydraulic fluid through the transverse circular orifice (12D) of the flow tube (12).

[110] The sliding mass (13) will slide downwards, unlocking the transverse circular hole (12D) of the flow tube (12) only when external forces enter the suspension that move the sliding mass (13) over the spring. support (14).

[111] When the suspension receives an impact from irregularities in the terrain, the impact force transfers energy to the suspension fork structure and to the hydraulic fluid inside the hydraulic rod (2).

[112] This energy moves the sliding mass (13) over the support spring (14), sliding the mass (13) downwards, compressing the support spring (14), unblocking the passage of hydraulic fluid through the transverse circular hole ( 12D) of the flow tube (12).

[113] Figure 1 1 illustrates the sliding mass (13) in position below the transverse circular hole (12D) of the flow tube (12), releasing the passage of the hydraulic fluid.

[114] Figure 12 illustrates the passage of hydraulic fluid through the transverse circular hole (12D) of the flow tube (12). [115] When the hydraulic fluid passage is unblocked through the transverse circular hole (12D) of the flow tube (12), the hydraulic fluid flow follows the same trajectory described when the damping blocking subassembly (6) is adjusted to integral damping and, in this way, the hydraulic fluid flows throughout the system, completing the damping cycle.

[116] When the suspension stops receiving impacts, the support spring (14) of the sliding mass (13) stabilizes and returns to the position above the transverse circular hole (12D) of the flow tube (12).

[117] The sliding mass (13) positioned above the transverse circular hole (12D) of the flow tube (12) again blocks the passage of hydraulic fluid through this hole, blocking the compression movement of the suspension and consequently blocking the damping.

[118] Figure 9 illustrates the sliding mass (13) blocking the transverse circular hole (12D) of the flow tube (12).

[119] Figure 10 illustrates the blockage of hydraulic fluid flow occurring through the sliding mass (13), obstructing the passage of hydraulic fluid through the transverse circular orifice (12D) of the flow tube (12).

[120] When the suspension begins the extension movement, the sliding mass (13) may be positioned above the transverse circular hole (12D) of the flow tube (12), blocking the flow through these holes, in which case the hydraulic fluid that filled the volume of the upper reservoir of the hydraulic rod (2) during compression, flows only through the side holes of the piston (16), to return to its initial position. [121] Figure 16 illustrates the flow of hydraulic fluid through the side holes of the piston (16) during the suspension extension movement, with the sliding mass (13) blocking the passage of hydraulic fluid through the transverse circular hole (12D) of the tube (12).

[122] This movement of the sliding mass (13) on the support spring (14) locks, unlocks and locks again the transverse circular orifice (12D) of the flow tube (12), which occurs very quickly, due to the sensitivity of the elastic constant of the support spring (14).

[123] As the sliding mass (13) moves quickly through the compression and extension of the support spring (14) which is supported on the piston (16), the protective cap is mounted on the lower end of the sliding mass (13). (15), made of polymer, whose function is to prevent noise or damage that could be caused by contact between the sliding mass (13) and the piston (16).

[124] The protective cover (15) keeps the system running smoothly, without noise and with high durability, protecting it against premature wear.

[125] Figures 17, 17A and 17B illustrate the compression and extension movement of the hydraulic rod (2) of the suspension fork, when the damping lock subassembly (6) is adjusted to lock the damping and an impact occurs that releases the flow of hydraulic fluid so that damping occurs.

[126] Figures 18, 18A and 18B illustrate the sequential movement of blocking and unblocking the flow of hydraulic fluid, which occurs in the blocking subassembly of the damping (6), through the linear movement of the sliding mass

(13) over the flow tube (12).

[127] The damping lock subassembly (6), when adjusted to lock the damping, will only be unlocked with forces that generate vibration energy in the suspension fork structure and in the hydraulic fluid, to make the sliding mass (13) move on the support spring (14).

[128] This condition of unlocking the damping lock subassembly (6) is generated through impacts on the suspension, such as impacts from terrain irregularities, impacts from jumps with the suspension, impacts from steps and impacts from any obstacle that causes vibration that moves the sliding mass (13) over the support spring

(14).

Regulation

[129] Adjusting the damping locking subassembly (6) allows you to adjust the force required to unlock the system.

[130] This adjustment can be made through the position of the adjustment cap (1 1).

[131] The adjustment cap (11) has linear movement over the flow tube (12), limited by the transverse opening (12C) for adjusting the flow tube (12), and the closer it is to the stem cover (8) the adjustment cap (11) is present, the greater the distance of the sliding mass (13) in relation to the transverse circular hole (12D) of the flow tube (12).

[132] Increasing the distance of the sliding mass (13) in relation to the transverse circular hole (12D) of the flow tube (12), the need for movement of the sliding mass (13) increases to unblock the passage of hydraulic fluid through this hole.

[133] As the sliding mass (13) has to move a greater distance to unlock the transverse circular orifice (12D) of the flow tube (12), a greater force will be required, which causes a greater vibration in the system so that unlocking occurs.

[134] The adjustment cap (11) moves by rotating the external regulator (7) which is mounted on the stem cover (8).

[135] When turning the external regulator (7), the internal regulator (9) turns and the specific adjustment nut (10) moves on the thread of the internal regulator (9), increasing or decreasing the distance in relation to the stem cover (8), according to the direction of rotation of the external regulator (7).

[136] The adjustment cap (1 1 ) is fixed to the specific adjustment nut (10) and when moving the specific adjustment nut (10), the adjustment cap (11) also moves, changing the position of the mass slider (13).

[137] By changing the position of the sliding mass (13), the force required to unlock the transverse circular orifice (12D) of the flow tube (12) changes.

[138] Through this adjustment system, the integral damping position is also reached when the adjustment cap (11) maintains the sliding mass (13) below the transverse circular orifice (12D) of the flow tube (12).

[139] The adjustment cover (11) has a transversal quadrangular cutout (11 B) at its lower end, so that, in the condition of full damping, the transversal circular orifice (12D) of the flow tube (12) does not block due to its position.

[140] This adjustment system allows you to adjust the sensitivity of the suspension to cushion impacts.

[141] If the user prefers to keep the suspension locked even when traveling over slightly uneven terrain, the external adjuster (7) is turned in a certain direction until reaching the ideal point for your preference. In this case, the suspension will only be unlocked when it suffers major impacts.

[142] If the user prefers the suspension to be unlocked with smaller impacts, the external adjuster (7) is turned in the opposite direction, until reaching the ideal point for his preference.

[143] The closer the edge of the sliding mass (13) is to the transverse circular hole (12D) of the flow tube (12), the smaller the impact required to unlock the system.

[144] The adjustment can also be used according to the user's weight.

[145] The objective of adjustment is to adapt the suspension's damping behavior according to the user's needs and preferences.

[146] Figure 6 illustrates the adjustment of the damping lock subassembly (6), positioned to maintain full damping.

[147] Figure 7 illustrates the free flow of hydraulic fluid through the transverse circular orifice (12D) of the flow (12), in the adjustment condition to maintain full damping.

[148] Figure 19 illustrates the adjustment of the damping locking subassembly (6), positioned in the condition to unlock the suspension compression with smaller impacts, that is, a position in which the distance from the end of the sliding mass (13) is smaller relative to the transverse circular orifice (12D) of the flow tube (12).

[149] Figure 20 illustrates the adjustment of the damping locking subassembly (6), positioned in the condition to unlock the suspension compression with larger impacts, that is, a position in which the distance from the end of the sliding mass (13) is greater relative to the transverse circular orifice (12D) of the flow tube (12).

[150] Figures 21, 21 A and 21 B illustrate in detail the three positions of the adjustment system described previously, the first being positioned for full damping, the second positioned to unlock compression and consequently generate damping for smaller impacts and the third positioned to unlock damping with larger impacts.

[151] Figure 22 illustrates the damping lock subassembly (6) in perspective view with the adjustment in the integral damping position.

[152] Figure 23 illustrates the damping locking subassembly (6) in perspective view with the adjustment in the locking position to be unlocked with minor impacts.

[153] Figure 24 illustrates the subset of damping lock (6) in perspective view with adjustment in the locked position to be unlocked with greater impacts.

[154] The damping lock subassembly (6), when adjusted to lock the damping, will not be unlocked with forces of constant intensity that do not generate vibration in the system. The cyclist's force on the suspension does not generate vibration and in this case, the damping system will remain blocked, preventing the cyclist from losing energy due to the suspension damping.

[155] It is true that, when the present utility model is put into practice, modifications may be introduced with regard to certain details of construction and shape, without this implying a departure from the fundamental principles that are clearly substantiated in the claim framework, It is therefore understood that the terminology used had the purpose of description and not limitation.

Claims

CLAIM: 1- "ARRANGEMENT INTRODUCED IN A BICYCLE SUSPENSION FORK WITH SELECTIVE DAMPING LOCKING" presents a subassembly for damping blocking characterized by comprising a flow tube (12), which is made up of a cylindrical tube provided with threads (12A) and ( 12B) on the external faces of the regions close to the ends, and next to the upper thread (12A) there is a transverse opening (12C) with an oblong vertical geometry and in half its height there is a transverse circular hole (12D); since said flow tube (12) is surrounded in its upper portion by the regulation cover (11), which consists of a cylindrical tube equipped with a transverse circular opening (11 A) in its upper portion and a quadrangular cutout transverse (11 B) at its lower end; said flow tube (12) is surrounded in its lower portion by the sliding mass (13), which consists of a cylindrical element, whose wall is greater in thickness than said adjustment cover (11), and internally it has a larger diameter in its lower half, where a helical support spring (14) is positioned, which surrounds the lower portion of the flow tube (12), with the lower portion of said sliding mass (13) being externally surrounded by a protective cover (15); so that the lower end of said flow tube (12) receives a piston (16) and a one-way valve (17) followed by a coaxially positioned helical valve spring (18), which is retained by an elastic ring ( 19) affixed to the lower tubular segment (16B) of the piston (16); Furthermore, said flow tube (12) receives internally in its upper portion an adjustment nut (10), which consists of a tubular cylinder equipped with of a transversal circular hole (10A) close to its lower end and has an internal regulator (9) threaded at its upper end, consisting of a predominantly cylindrical element, which is provided with a quadrangular conformation (9A) in its upper portion, followed below by a cylindrical region, equipped with a recess (9B), where the o-ring (24) is located; It is observed that said quadrangular conformation has on its upper face a circular coaxial hole (9C), equipped with a thread; since the upper end of the flow tube (12) is mounted on the inner portion of the stem cap (8), which is followed above by an external regulator (7) in coaxial, which is pierced by a screw (22) , which in turn is attached to the threaded hole (9C) of the internal regulator (9); finally the hole (10A) of the adjustment nut (10), the hole (11 A) of the adjustment cap (11), and the hole (12C) of the flow tube (12) are aligned and passed through by the screw (26) , which in turn receives the nut (27).