CN217348095U - Oil rod for front fork - Google Patents

Abstract

The utility model discloses a front fork is with oily stick, include: the internal part of the cylinder body is divided into a first oil chamber, a second oil chamber and a third oil chamber, and the fixed valve core is provided with a compression fluid channel communicated with the first oil chamber and the second oil chamber; the upper end of the inner tube is hermetically connected with the top end sealing seat, the lower end of the inner tube is hermetically connected with the fixed valve core, the upper end of the driving tube is hermetically penetrated through the top end sealing seat and then is connected with the first control assembly, the lower end of the driving tube hermetically penetrates through the fixed valve core, the lower end of the driving tube is sleeved with a valve block, a valve hole is formed in the valve block, and the first control assembly controls the valve block to rotate, so that a compressed fluid channel is shielded or at least partially exposed; the piston rod is at least partially positioned in the cylinder body and connected with the sliding valve core, the piston rod is provided with a damping hole communicated with the second oil chamber and the third oil chamber, and a rebound adjusting mechanism for adjusting the on-off and the size of the damping hole is arranged in the cylinder body.

Description

Oil rod for front fork

Technical Field

The utility model relates to a front fork technical field especially relates to a front fork is with oil stick.

Background

Along with the promotion of people's life theory, ride and be accepted by more and more people, people realize green trip or the purpose of body building through riding. The bicycle front fork is an important part in a bicycle structure, the upper end of the bicycle front fork is connected with a handlebar, the lower end of the bicycle front fork is matched with a front wheel to form a front wheel structure with a guiding function, and the existing middle-high end bicycle front fork generally has a shock absorbing function and is used for improving the comfort level of a rider riding on a bumpy road surface. However, the front fork has many problems in the application process, the front fork can meet various road surfaces in the riding process, the bumping degrees are different, so that the impact on the front fork is different, and in order to cope with various impacts, the hardness of the front fork for shock absorption is often adjusted according to the actual situation so as to prevent the bottom hitting phenomenon of the front fork; when the bicycle suddenly bumps to a large extent, the phenomenon that the bicycle head jumps or bounces due to too fast rebound of the front fork often occurs, and danger is brought to riders.

The front fork has a shock-absorbing part and a non-shock-absorbing part, and the common mountain bike uses the shock-absorbing front fork. The function of the front fork that shocks resistance has just played the effect time of increase power to reduce the momentum of power, have fine protection effect to the automobile body, especially in cross country riding, reduce the degree of difficulty of riding. The final purpose of the dead lock of the front fork is to fully use the pedaling force to the advancing power in climbing or level road riding, so as to improve the riding speed. When the front fork is locked, the shock-absorbing capacity of the front fork is greatly reduced, and the shock-absorbing effect is reduced by about 90 percent. At present, the dead locking mechanism of the front fork has a complex structure and high cost, and the size of compression damping can not be flexibly adjusted.

SUMMERY OF THE UTILITY MODEL

In order to overcome prior art's not enough, the utility model aims to provide a front fork is with oil stick, can nimble control front fork lock die state and unblock state, can adjust the front fork resilience damping effect wantonly again, effectively improve ride in-process oil gas front fork to the adaptability of complicated road conditions, ensure the personal safety of the personnel of riding when running fast and meet multiple complicated road conditions.

The purpose of the utility model is realized by adopting the following technical scheme:

an oil stick for a front fork, comprising: the hydraulic cylinder comprises a cylinder body, wherein a top end sealing seat, a fixed valve core, a sliding valve core and a bottom end sealing seat are sequentially arranged in the cylinder body from top to bottom, a first oil chamber is defined between the fixed valve core and the top end sealing seat, a second oil chamber is defined between the fixed valve core and the sliding valve core, a third oil chamber is defined between the sliding valve core and the bottom end sealing seat, and the fixed valve core is provided with a compression fluid channel communicated with the first oil chamber and the second oil chamber;

the oil pressure locking mechanism comprises an inner tube positioned in the first oil chamber, a driving tube movably penetrating through the inner tube and a first control assembly, the upper end of the inner tube is connected with the top end sealing seat in a sealing manner, the lower end of the inner tube is connected with a fixed valve core in a sealing manner, the upper end of the driving tube penetrates through the top end sealing seat in a sealing manner and then is connected with the first control assembly arranged at the top of the cylinder body, the lower end of the driving tube penetrates through the fixed valve core in a sealing manner and extends to the second oil chamber, a valve block is sleeved at the end part, positioned in the second oil chamber, of the driving tube, a valve hole is formed in the valve block, the driving tube can rotate relative to the inner tube, and the first control assembly is used for controlling the valve block to rotate, so that the compressed fluid channel is shielded or at least partially exposed;

the piston rod is at least partially located in the cylinder body and connected with the sliding valve core, the piston rod is provided with a damping hole communicated with the second oil chamber and the third oil chamber, and a rebound adjusting mechanism used for adjusting the on-off and size of the damping hole is further arranged in the cylinder body.

Further, the rebound adjusting mechanism comprises a driving rod and a second control assembly, an adjusting piece is arranged inside the piston rod, an adjusting hole is formed in the adjusting piece, the upper end of the driving rod is inserted into the driving tube and extends towards the direction of the top end sealing seat to be connected with the second control assembly, the lower end of the driving rod is connected with the adjusting piece, the driving rod and the driving tube are mutually independent, and the second control assembly is used for controlling the rotation of the adjusting piece, so that the damping hole is shielded or at least partially exposed.

Furthermore, the first control assembly comprises a rotary transmission part, a cavity for containing the rotary transmission part is arranged at the part, protruding out of the cylinder body, of the top end sealing seat, the rotary transmission part is rotatably arranged in the cavity, the rotary transmission part is provided with a connecting hole matched with the driving pipe, the upper end of the driving pipe penetrates through the top end sealing seat in a sealing mode and then is connected with the rotary transmission part, and the rotary transmission part is connected with a locking adjusting knob.

Furthermore, the rotating transmission part is provided with a wire control connecting hole, and the top end sealing seat is provided with a wire control through hole communicated with the wire control connecting hole.

Furthermore, a conical spring and a first limiting part are sleeved on the part, located in the second oil chamber, of the driving pipe, and the conical spring is located between the valve plate and the first limiting part.

Furthermore, the compression fluid channel is provided with a plurality of, the valve block is the ring shape, circumference evenly is equipped with a plurality of valve openings on the valve block, the valve opening with the compression fluid channel one-to-one sets up.

Further, the second control assembly comprises a rebound adjusting knob, the rebound adjusting knob comprises a rotary rod part and a rotary cap part, the first control assembly is provided with a first through hole, and the rotary rod part is inserted into the first through hole and extends towards the direction of the driving pipe to be in threaded connection with the driving rod in the driving pipe.

Furthermore, the adjusting part is provided with a second limiting part, the damping hole is provided with a first limiting end part and a second limiting end part, and when the second limiting part abuts against the first limiting end part or the second limiting end part, the adjusting part can be limited to rotate relative to the piston rod.

Further, resilience adjustment mechanism still includes sliding sleeve, resilience spring and resilience retaining ring, the sliding sleeve movable sleeve is located the piston rod is outside, resilience retaining ring and resilience spring are all located the piston rod is outside, just resilience spring is located the sliding sleeve with between the resilience retaining ring, the sliding spool axial is run through and is equipped with a plurality of resilience fluid passageways, resilience fluid passageway intercommunication the second grease chamber with the third grease chamber, the one end elasticity of resilience spring support in the resilience retaining ring, the other end support in the sliding sleeve, so that the sliding sleeve normality is close a plurality of resilience fluid passageways and forms the hindrance.

Furthermore, an annular groove is formed in the outer portion of the sliding valve core, an annular clamping ring is embedded in the annular groove, the outer peripheral surface of the annular clamping ring is in sliding contact with the inner peripheral surface of the cylinder body, a gap is formed in the annular clamping ring, and the oil body reciprocates in the second oil chamber and the third oil chamber from the gap to form an edge oil path.

Compared with the prior art, the beneficial effects of the utility model reside in that:

in the utility model, the first control component locks or unlocks the shock-absorbing function of the front fork, the rotary valve piece shields the compressed fluid channel, so that the rotary valve piece controls the circulation space between the valve hole and the compressed fluid channel, and a user can flexibly control the size of the compression damping of the front fork by adjusting the size of the circulation space; the on-off and the size of the damping hole are controlled through the rebound adjusting mechanism, the flow area of the damping hole is adjustable, the flow is controlled, and the rebound damping effect is adjusted at will. The utility model discloses effectively improved the adaptability of in-process oil gas front fork of riding to complicated road conditions, ensured the personal safety of the personnel of riding when running fast and meet multiple complicated road conditions.

Drawings

Fig. 1 is a schematic view of an oil stick for a front fork according to the present invention;

fig. 2 is a cross-sectional view of an oil stick for a front fork according to the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is an enlarged view of a portion of FIG. 2 at B;

fig. 5 is an exploded view of the oil pressure locking mechanism provided by the present invention;

fig. 6 is an assembly schematic view of a piston rod and a sliding valve core of the oil rod for the front fork provided by the present invention;

in the figure: 10. a cylinder body; 101. a top end sealing seat; 1010. a wire control through hole; 102. a bottom end sealing seat; 103. a sliding valve core; 1030. a rebound fluid passage; 104. fixing the valve core; 1040. a compressed fluid channel; 105. a first oil chamber; 106. a second oil chamber; 107. a third oil chamber; 108. an annular snap ring; 109. a gap is formed; 20. a piston rod; 201. a damping hole; 30. an oil pressure locking mechanism; 301. an inner tube; 302. a drive tube; 303. a valve plate; 3030. a valve bore; 304. a conical spring; 305. a first limiting part; 306. rotating the transmission member; 3060. a wire control connecting hole; 307. locking the adjusting knob; 308. compressing the retainer ring; 40. a rebound adjusting mechanism; 401. a drive rod; 402. an adjustment member; 4020. an adjustment hole; 403. a rebound adjusting knob; 404. a second limiting part; 405. a sliding sleeve; 406. a rebound spring; 407. a rebound retainer ring.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", "vertical", "top", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "one," "another," and the like, are used to distinguish similar elements, and these terms and other similar terms are not intended to limit the scope of the present invention.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art. Corresponding reference numerals are used throughout the figures to indicate corresponding or corresponding elements (e.g., elements identified as "1 XX" and "2 XX" are structurally identical and functionally similar).

As shown in fig. 1-6, for the utility model provides a front fork oil stick, include: the hydraulic cylinder comprises a cylinder body 10, wherein a top end sealing seat 101, a fixed valve core 104, a sliding valve core 103 and a bottom end sealing seat 102 are sequentially arranged in the cylinder body 10 from top to bottom, a first oil chamber 105 is defined between the fixed valve core 104 and the top end sealing seat 101, a second oil chamber 106 is defined between the fixed valve core 104 and the sliding valve core 103, a third oil chamber 107 is defined between the sliding valve core 103 and the bottom end sealing, and the fixed valve core 104 is provided with a compression fluid channel 1040 for communicating the first oil chamber 105 and the second oil chamber 106;

the oil pressure locking mechanism 30, the oil pressure locking mechanism 30 includes an inner tube 301 located in the first oil chamber 105, a driving tube 302 movably inserted in the inner tube 301, and a first control component, the upper end of the inner pipe 301 is connected with the top end sealing seat 101 in a sealing way, the lower end of the inner pipe 301 is connected with the fixed valve core 104 in a sealing way, the upper end of the driving pipe 302 is hermetically penetrated through the top end sealing seat 101 and then is connected with a first control component arranged at the top of the cylinder body 10, the lower end of the drive tube 302 sealingly passes through the fixed spool 104 and extends to the second oil chamber 106, a valve plate 303 is sleeved at the end part of the driving pipe 302 positioned in the second oil chamber 106, a valve hole 3030 is arranged on the valve plate 303, the driving tube 302 can rotate relative to the inner tube 301, and the first control component is used for controlling the valve plate 303 to rotate, so that the compression fluid channel 1040 is shielded or at least partially exposed;

the piston rod 20 is at least partially positioned in the cylinder body 10 and connected with the sliding valve core 103, the piston rod 20 is provided with a damping hole 201 communicated with the second oil chamber 106 and the third oil chamber 107, and the cylinder body 10 is further internally provided with a rebound adjusting mechanism 40 for adjusting the on-off and the size of the damping hole 201.

The utility model discloses in, through the rotation of control assembly control valve block 303, realize that valve opening 3030 docks or staggers with compression fluid passageway 1040, when valve opening 3030 and compression fluid passageway 1040 of valve block 303 stagger, first grease chamber 105 and second grease chamber 106 do not communicate, form closed system, hydraulic oil can not the free flow between first grease chamber 105 and second grease chamber 106, form closed system, make the buffering of front fork move away to avoid possible earthquakes and be closed, realize the locking of front fork; when the valve hole 3030 of the valve plate 303 is butted with the compression fluid channel 1040, the first oil chamber 105 and the second oil chamber 106 are communicated with each other, hydraulic oil can freely flow between the first oil chamber 105 and the second oil chamber 106, so that the front fork has a buffering and shock-absorbing function, shock-absorbing unlocking of the front fork is realized, if the front fork is impacted, the piston rod 20 moves towards the direction close to the first oil chamber 105, and oil in the second oil chamber 106 flows to the first oil chamber 105 through the valve hole 3030 and the compression fluid channel 1040, so that buffering and shock absorption are realized; after the impact force is unloaded, the piston rod 20 moves away from the first oil chamber 105, and the hydraulic oil in the first oil chamber 105 flows to the second oil chamber 106 through the compression fluid passage 1040 and the valve hole 3030 until the front fork is reset.

Before the bicycle is driven, the oil pressure rebound speed can be adjusted in advance through the rebound adjusting mechanism 40, when the damping hole 201 is not shielded by the rebound adjusting mechanism 40 at all, the oil pressure rebound speed reaches the maximum, and when the rebound adjusting mechanism 40 closes the damping hole 201 at all, the oil pressure rebound speed reaches the minimum. By arranging the rebound adjusting mechanism 40, the oil body flow of the second oil chamber 106 flowing to the third oil chamber 107 is controlled, and the rebound damping effect is adjusted; when the user need adjust its resilience damping effect because of road or self custom, accessible resilience adjustment mechanism 40 is adjusted, makes it shelter from or at least part shows the orifice 201, realizes that the flow area size of orifice 201 is adjustable to this control flow size, the scope of orifice 201 that the setting resilience adjustment mechanism 40 sheltered from promptly, in order to reach the arbitrary adjustment resilience damping effect.

The utility model discloses a function lock of moving away to avoid possible earthquakes of front fork is dead or the unblock is realized to first control assembly, shield compression fluid passage 1040 through rotary valve piece 303, make the circulation space between its control valve opening 3030 and the compression fluid passage 1040, the size in its circulation space of user's accessible adjustment, the compression damping size of nimble control front fork, effectively improve the adaptability of the in-process oil gas front fork of riding to complicated road conditions, ensure the personal safety of the personnel of riding when traveling fast and meet multiple complicated road conditions. The on-off and the size of the damping hole 201 are controlled by the rebound adjusting mechanism 40, so that the flow area of the damping hole 201 can be adjusted, the flow is controlled, and the rebound damping effect can be adjusted at will.

In a preferred embodiment, the rebound adjusting mechanism 40 includes a driving rod 401 and a second control assembly, an adjusting member 402 is disposed inside the piston rod 20, an adjusting hole 4020 is disposed on the adjusting member 402, an upper end of the driving rod 401 is inserted into the driving tube 302 and extends toward the top end sealing seat 101 to connect to the second control assembly, a lower end of the driving rod 401 is connected to the adjusting member 402, the driving rod 401 and the driving tube 302 are independent, and the second control assembly is configured to control the rotation of the adjusting member 402, so as to shield or at least partially expose the damping hole 201.

In this embodiment, drive actuating lever 401 through the second control assembly and rotate, actuating lever 401 drives regulating part 402 and rotates, shelters from or at least part reveals through regulating part 402 then damping hole 201 realizes that damping hole 201's flow area size is adjustable to this control flow size to reach arbitrary adjustment rebound damping effect.

As a preferred embodiment, the first control component includes a rotary transmission member 306, a cavity for accommodating the rotary transmission member 306 is formed in a portion of the top end sealing seat 101 protruding outside the cylinder 10, the rotary transmission member 306 is rotatably disposed in the cavity, the rotary transmission member 306 is provided with a connection hole adapted to the driving tube 302, an upper end of the driving tube 302 is connected to the rotary transmission member 306 after passing through the top end sealing seat 101 in a sealing manner, and the rotary transmission member 306 is connected to a locking adjusting knob 307.

In this embodiment, the locking adjusting knob 307 is rotated to drive the rotating transmission member 306 to rotate, and then drive the driving tube 302 to rotate, so that the valve plate 303 rotates along with the driving tube 302, and the valve plate 303 covers or at least partially exposes the compressed fluid channel 1040, thereby locking or unlocking the front fork.

In a preferred embodiment, the rotary transmission member 306 is provided with a wire control connection hole 3060, and the top end sealing seat 101 is provided with a wire control through hole 1010 which is communicated with the wire control connection hole 3060. In this embodiment, the drive-by-wire module of the handlebar can be inserted into the drive-by-wire through hole 1010 to connect with the drive-by-wire connecting hole 3060 of the rotary transmission member 306, so that the rotary transmission member 306 can be driven to rotate by the drive-by-wire module, thereby realizing the drive-by-wire locking function. The drive-by-wire module of the present embodiment is the prior art.

In a preferred embodiment, a conical spring 304 and a first stopper 305 are sleeved on a portion of the driving pipe 302 located in the second oil chamber 106, and the conical spring 304 is located between the valve plate 303 and the first stopper 305. Under the front fork is in the lock state, if the bicycle front wheel meets huge impact suddenly, the hydraulic oil in the first oil chamber 105 can break open the valve plate 303, so that the lock state of the front fork can be released, the driver is protected, the oil pressure lock mechanism 30 is protected from being broken, and the limit protection effect is achieved. When this large impact disappears, the conical spring 304 pushes the valve plate 303 up and returns to the locked state. The conical spring 304 has good stability, can not shake left and right when bearing pressure, is directly vertically compressed downwards, and is directly vertically extruded upwards when resetting. The first position-limiting portion 305 is preferably a position-limiting nut, and the driving tube 302 is provided with a threaded portion in threaded connection with the position-limiting nut. This facilitates the installation of the conical spring 304 and the valve plate 303.

In a preferred embodiment, a plurality of compression check rings 308 are disposed between the lower end of the inner tube 301 and the upper end surface of the fixed valve element 104, and the fixed valve element 104 is protected by the plurality of compression check rings 308.

As a preferred embodiment, the number of the compression fluid channels 1040 is multiple, the valve plate 303 is circular, a plurality of valve holes 3030 are uniformly arranged on the valve plate 303 in the circumferential direction, and the valve holes 3030 and the compression fluid channels 1040 are arranged in a one-to-one correspondence manner.

In a preferred embodiment, the second control assembly comprises a rebound adjusting knob 403, the rebound adjusting knob 403 comprises a rotating rod part and a rotating cap part, the first control assembly is provided with a first through hole, and the rotating rod part is inserted into the first through hole and extends towards the driving pipe 302 so as to be in threaded connection with the driving rod 401 in the driving pipe 302. In this embodiment, the deadlocking adjusting knob 307 of the first control component is provided with a first through hole, so that the cap screwing portion of the rebounding adjusting knob 403 is located at the top of the deadlocking adjusting knob 307, and the driving rod 401 can be driven to rotate by rotating the cap screwing portion, so that the rotation of the adjusting part 402 is realized, and the operation is simple and convenient. The resilience adjusting knob 403 and the dead-lock adjusting knob 307 of the embodiment are both centralized at the top of the cylinder body 10, and when the oil rod is installed in the front fork, the resilience adjusting knob 403 and the dead-lock adjusting knob 307 are both positioned on the shoulder cover of the front fork, so that the resilience function or the dead-lock function can be adjusted without squatting, and the use is facilitated. In addition, because first control assembly can be connected with the drive-by-wire module for this oil stick has shoulder accuse locking function, drive-by-wire locking function and resilience function, greatly reduced the cost.

In a preferred embodiment, the adjusting member 402 is provided with a second limiting portion 404, the damping hole 201 has a first limiting end and a second limiting end, and the adjusting member 402 can be limited from rotating relative to the piston rod 20 when the second limiting portion 404 abuts against the first limiting end or the second limiting end.

In a preferred embodiment, the rebound adjusting mechanism 40 further includes a sliding sleeve 405, a rebound spring 406 and a rebound retainer 407, the sliding sleeve 405 is movably sleeved outside the piston rod 20, the rebound retainer 407 and the rebound spring 406 are both sleeved outside the piston rod 20, the rebound spring 406 is located between the sliding sleeve 405 and the rebound retainer 407, the sliding valve spool 103 axially penetrates through a plurality of rebound fluid passages 1030, the rebound fluid passages 1030 communicate the second oil chamber 106 and the third oil chamber 107, one end of the rebound spring 406 elastically abuts against the rebound retainer 407, and the other end of the rebound spring 406 abuts against the sliding sleeve 405, so that the sliding sleeve 405 is normally closed to the plurality of rebound fluid passages 1030 to form an obstruction.

When the pressure value of the second oil chamber 106 exceeds the preset value, the oil body of the second oil chamber 106 enters from the rebound fluid passage 1030 and pushes the sliding sleeve 405 to displace downward (while the sliding sleeve 405 compresses the rebound spring 406), so that the sliding sleeve 405 no longer obstructs the rebound fluid passage 1030 to form an open state, and the oil body flowing into the rebound fluid passage 1030 flows to the third oil chamber 107 from the gap between the lower end position of the rebound fluid passage 1030 and the sliding sleeve 405. Until the pressure value of the second oil chamber 106 drops below the preset value, the rebound spring 406 is pushed by the elastic force to reset the sliding sleeve 405 and approaches the position of the outer edge below the rebound fluid channel 1030 again to form an obstruction.

In a preferred embodiment, an annular groove is formed on the outside of the spool 103, an annular snap ring 108 is fitted into the annular groove, the outer circumferential surface of the annular snap ring 108 is in sliding contact with the inner circumferential surface of the cylinder 10, the annular snap ring 108 is provided with a notch gap 109, and an oil body reciprocates in the second oil chamber 106 and the third oil chamber 107 from the notch gap 109 to form a rim oil path. In the present embodiment, the oil bodies of the second oil chamber 106 and the second oil chamber 106 can pass through each other from the rim oil path in a normal state, so that the damping hole 201 still has a damping function against shock and rebound even when being completely closed.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims (10)

1. An oil stick for a front fork, comprising: the oil-gas separator comprises a cylinder body (10), wherein a top end sealing seat (101), a fixed valve core (104), a sliding valve core (103) and a bottom end sealing seat (102) are sequentially arranged in the cylinder body (10) from top to bottom, a first oil chamber (105) is defined between the fixed valve core (104) and the top end sealing seat (101), a second oil chamber (106) is defined between the fixed valve core (104) and the sliding valve core (103), a third oil chamber (107) is defined between the sliding valve core (103) and the bottom end sealing seat (102), and the fixed valve core (104) is provided with a compression fluid channel (1040) which is communicated with the first oil chamber (105) and the second oil chamber (106);

oil pressure locking mechanism (30), oil pressure locking mechanism (30) is including being located inner tube (301), the activity in first grease chamber (105) are worn to locate driving tube (302) and first control assembly in inner tube (301), the upper end of inner tube (301) with top seal receptacle (101) sealing connection, the lower extreme and fixed case (104) sealing connection of inner tube (301), the upper end seal of driving tube (302) is worn to establish with the first control assembly who locates cylinder body (10) top behind top seal receptacle (101) links to each other, the lower extreme seal of driving tube (302) passes fixed case (104) and extends to second grease chamber (106) the tip cover that driving tube (302) is located second grease chamber (106) is equipped with valve block (303), be equipped with valve opening (3030) on valve block (303), driving tube (302) can be relative inner tube (301) are rotatory, the first control component is used for controlling the valve plate (303) to rotate so as to shield or at least partially expose the compression fluid channel (1040);

the piston rod (20), piston rod (20) at least part be located in cylinder body (10) and with slide valve core (103) are connected, piston rod (20) are equipped with intercommunication second grease chamber (106) and third grease chamber (107) damping hole (201), still be equipped with in cylinder body (10) and be used for adjusting resilience adjustment mechanism (40) of damping hole (201) break-make and size.

2. The oil stick for front forks of claim 1, characterized in that, the rebound adjusting mechanism (40) comprises a driving rod (401) and a second control assembly, the inside of the piston rod (20) is provided with an adjusting member (402), the adjusting member (402) is provided with an adjusting hole (4020), the upper end of the driving rod (401) is inserted into the driving tube (302) and extends towards the top end sealing seat (101) to connect with the second control assembly, the lower end of the driving rod (401) is connected with the adjusting member (402), the driving rod (401) and the driving tube (302) are independent, and the second control assembly is used for controlling the rotation of the adjusting member (402) so as to shield or at least partially expose the damping hole (201).

3. The oil rod for the front fork as recited in claim 1, wherein the first control component comprises a rotary transmission member (306), a cavity for accommodating the rotary transmission member (306) is formed in a part of the top end sealing seat (101) protruding out of the cylinder body (10), the rotary transmission member (306) is rotatably arranged in the cavity, a connecting hole matched with the driving pipe (302) is formed in the rotary transmission member (306), the upper end of the driving pipe (302) penetrates through the top end sealing seat (101) in a sealing manner and then is connected with the rotary transmission member (306), and the rotary transmission member (306) is connected with a locking adjusting knob (307).

4. The oil rod for the front fork as recited in claim 3, wherein the rotary transmission member (306) is provided with a wire control connecting hole (3060), and the top end sealing seat (101) is provided with a wire control through hole (1010) communicated with the wire control connecting hole (3060).

5. The oil bar for front forks of claim 1, wherein a conical spring (304) and a first limit part (305) are sleeved on the portion of the driving pipe (302) located in the second oil chamber (106), and the conical spring (304) is located between the valve plate (303) and the first limit part (305).

6. The oil rod for the front fork as claimed in claim 1, wherein the number of the compression fluid channels (1040) is multiple, the valve plate (303) is annular, a plurality of valve holes (3030) are uniformly formed in the valve plate (303) in the circumferential direction, and the valve holes (3030) and the compression fluid channels (1040) are arranged in a one-to-one correspondence manner.

7. A fork stick as claimed in claim 2, wherein the second control assembly comprises a rebound adjustment knob (403), the rebound adjustment knob (403) comprising a rod portion and a cap portion, the first control assembly having a first through hole, the rod portion being inserted into the first through hole and extending in the direction of the drive tube (302) to be threadedly connected to the drive rod (401) within the drive tube (302).

8. The oil stick for a front fork of claim 2, wherein the adjusting member (402) is provided with a second limit portion (404), and the orifice (201) has a first limit end portion and a second limit end portion, and the adjusting member (402) is restricted from rotating relative to the piston rod (20) when the second limit portion (404) abuts against the first limit end portion or the second limit end portion.

9. The oil stick for a front fork of claim 2, wherein the rebound adjusting mechanism (40) further comprises a sliding sleeve (405), a rebound spring (406) and a rebound retainer (407), the sliding sleeve (405) is movably sleeved outside the piston rod (20), the rebound retainer ring (407) and the rebound spring (406) are both sleeved outside the piston rod (20), and the rebound spring (406) is positioned between the sliding sleeve (405) and the rebound retainer (407), a plurality of rebound fluid channels (1030) axially penetrate through the sliding valve core (103), the rebound fluid passage (1030) communicating the second oil chamber (106) with the third oil chamber (107), one end of the rebound spring (406) is propped against the rebound retainer ring (407), the other end of the rebound spring (406) is propped against the sliding sleeve (405), such that the sliding sleeve (405) is normally in the proximity of the plurality of rebound fluid passages (1030) to form an obstruction.

10. The oil rod for the front fork as recited in claim 1, wherein an annular groove is formed outside the sliding valve core (103), an annular snap ring (108) is embedded in the annular groove, the outer peripheral surface of the annular snap ring (108) is in sliding contact with the inner peripheral surface of the cylinder body (10), the annular snap ring (108) is provided with a gap (109), and the oil body reciprocates in the second oil chamber (106) and the third oil chamber (107) from the gap (109) to form a rim oil path.

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