An adjustable-damping balance bar

Abstract

The present application relates to the field of shock absorber, especially to a kind of adjustable damping balance bar with high driving stability and high convenience, comprising first hydraulic cylinder, second hydraulic cylinder, piston rod, piston, first sealing cover, second sealing cover, third sealing cover, support seat, connecting seat, first joint bearing, second joint bearing and adjusting device, the first hydraulic cylinder, second hydraulic cylinder are integrally connected, the central axis of the first hydraulic cylinder is parallel with the central axis of second hydraulic cylinder, the first sealing cover, second sealing cover are respectively covered in the axial two ends of first hydraulic cylinder, so that first hydraulic cylinder forms first cavity, the piston rod is worn in first hydraulic cylinder, and the two ends of piston rod respectively pass through first sealing cover and second sealing cover, the piston is fixed in the middle part of piston rod, and is distributed in first cavity, the support seat is arranged in the axial one end of piston rod, and the first joint bearing is arranged on support seat.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of shock absorbers, in particular to a balance bar with adjustable damping. BACKGROUND

[0002] During the driving process of a motorcycle, impact force will be generated on the front wheel due to uneven road surface or turning, and this impact force has both vertical and lateral components. The shock absorber can only reduce the vertical impact, i.e., it can reduce the vertical bounce, but the lateral impact force generated on the front wheel will cause the front wheel to swing left and right, thereby causing the front fork assembly to also swing left and right. Sometimes, due to fast driving speed or poor road conditions, this left-right swing impact can be even violent, causing the handlebar to rotate left and right relative to the frame and making it difficult to control the driving direction of the vehicle. Not only does this affect the stability of driving, but it also causes the driver's hands to feel strong vibrations, resulting in fatigue and discomfort.

[0003] Chinese Patent Application No. 201920819101.X discloses a convenient-to-use motorcycle tire balancer, which includes a base, support columns, bearings, mounting shafts, and clamping blocks. The bottom of the base is provided with several adjustment foot pads, two oblong support columns are installed on the base, two identical bearings are installed on the opposite sides of each support column, the center lines of the four bearings are located on the same horizontal plane, the distance between the bearings on the two support columns is equal, and the bearings are located near the top end of the support columns. The mounting shafts are supported by two bearings on different support columns, and the support columns are provided with auxiliary grooves that allow the mounting shafts to pass through. Two clamping blocks are installed on the mounting shafts, the opposite ends of the two clamping blocks are horizontally arranged in a conical frustum shape, clamping bolts are screwed onto the clamping blocks, and the ends of the clamping bolts are in close contact with the mounting shafts. This balancer allows the tire to be well fixed on the mounting shaft by arranging the clamping blocks on the mounting shaft, and the setting of the baffle prevents the tire and mounting shaft from slipping off. The setting of the leveler makes it easy to adjust the adjustment foot pads, so that the mounting shaft can be better in a horizontal state, and the driving stability can be improved to a certain extent. However, this structure is complex, occupies a large space during installation, and is difficult to adjust, resulting in poor convenience of use. SUMMARY

[0004] Therefore, in view of the above problems, the present application provides a balance bar with adjustable damping that improves the driving stability of a motorcycle and has high convenience of use.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] The adjustable damping balance bar comprises a first hydraulic cylinder, a second hydraulic cylinder, a piston rod, a piston, a first sealing cover, a second sealing cover, a third sealing cover, a support seat, a connecting seat, a first joint bearing, a second joint bearing and an adjusting device, the first hydraulic cylinder and the second hydraulic cylinder are integrally connected, the central axis of the first hydraulic cylinder is parallel to the central axis of the second hydraulic cylinder, the first sealing cover and the second sealing cover are respectively arranged on the axial two ends of the first hydraulic cylinder, so that a first cavity is formed in the first hydraulic cylinder, the piston rod is arranged in the first hydraulic cylinder, and the two ends of the piston rod pass through the first sealing cover and the second sealing cover respectively, the piston is fixedly arranged on the middle part of the piston rod and is distributed in the first cavity, the support seat is arranged on the axial one end of the piston rod, the first joint bearing is arranged on the support seat, the axial other end of the piston rod is provided with a bumper, the third sealing cover and the adjusting device are respectively arranged on the axial two ends of the second hydraulic cylinder, so that a second cavity is formed in the second hydraulic cylinder, the first hydraulic cylinder and the second hydraulic cylinder are provided with a first connecting hole and a second connecting hole which are connected with the first cavity and the second cavity, the first connecting hole and the second connecting hole are distributed on the two sides of the piston, the first connecting hole is connected with the adjusting device to realize the flow size adjustment of the first connecting hole, the second connecting hole is connected with the third sealing cover to realize the flow size adjustment of the second connecting hole, the connecting seat is movably connected with the first hydraulic cylinder and the second hydraulic cylinder, the second joint bearing is arranged on the connecting seat, and the first joint bearing and the second joint bearing are respectively connected with the vehicle body and the handlebar to realize the driving stability.

[0007] Further, the adjusting device comprises a valve seat, a valve core, a valve rod, a rotating block and a knob, the valve seat is fixedly arranged on the axial one end of the second hydraulic cylinder, the central axis of the valve seat is provided with a flow channel which is connected with the axial two end faces, the middle part of the circumferential outer surface of the valve seat is recessed with a first annular groove, the first annular groove is connected with the first connecting hole, the bottom surface of the first annular groove is provided with at least three third connecting holes which are connected with the flow channel, the rotating block is rotatably embedded at the outer end of the flow channel of the valve seat, the central axis of the rotating block is provided with a first threaded hole, the knob is clamped on the rotating block, the valve rod is arranged in the first threaded hole and is threadedly connected with the first threaded hole, the axial outer end of the valve core is clamped on the axial inner end of the valve rod, and the axial inner end of the valve core is distributed at the third connecting hole, and the flow size of the flow channel is adjusted by rotating the valve core.

[0008] Further, the circumferential outer surface of the valve seat and the axial two sides of the first annular groove are recessed with a first annular sealing groove, and the first annular sealing groove is embedded with a first sealing ring.

[0009] Further, the middle part of the circumferential outer surface of the valve rod is recessed with a second annular sealing groove, and the second annular sealing groove is embedded with a second sealing ring.

[0010] Further, the valve core comprises a clamping portion, a connecting portion and an adjusting portion arranged integrally, the clamping portion and the adjusting portion are respectively distributed at the two axial ends of the connecting portion, the clamping portion is in a cuboid structure, the diameter size of the adjusting portion is smaller than that of the connecting portion, and the inner end of the adjusting portion in the axial direction is in a semispherical structure.

[0011] Further, the third sealing cover comprises an end cover, a cover body, a spring, a first clamp and a cylindrical block, the end cover and the cover body are embedded at one axial end of the second hydraulic cylinder, the end cover is located outside the cover body, the inner end surface of the end cover is provided with a positioning block, the first clamp is clamped between the end cover and the second hydraulic cylinder, the outer end surface of the cover body is recessed with a first positioning groove, one end of the spring is embedded in the first positioning groove, the other end of the spring abuts against the inner end surface of the end cover, the inner end surface of the cover body is recessed with a second positioning groove, and the cylindrical block is embedded in the second positioning groove.

[0012] Further, the bottom surface of the second positioning groove is recessed with a recess in a tapered structure, and the bottom of the recess is provided with a fourth connecting hole in communication with the first positioning groove.

[0013] Further, the circumferential outer surface of the cover body is recessed with at least two third annular sealing grooves, and the third sealing grooves are embedded with third sealing rings.

[0014] Further, the axial length of the first hydraulic cylinder is equal to the axial length of the second hydraulic cylinder, and the diameter of the first hydraulic cylinder is larger than that of the second hydraulic cylinder.

[0015] By adopting the technical scheme, the adjustable damping balance bar is connected with the vehicle body and the handlebar through the first joint bearing on the piston rod and the second joint bearing on the connecting seat respectively, and the installation convenience of the balance bar is high and the installation occupies small space, and the use convenience is greatly improved, and when the lateral impact of the front wheel is small, the lateral impact force acts on the piston rod and the connecting seat, so that the end of the piston rod provided with the first joint bearing moves towards the first hydraulic cylinder and the second hydraulic cylinder, thereby driving the piston to extrude the damping oil in the first cavity, the damping oil in the first cavity and located at the lower side of the piston enters the second cavity through the first connecting hole, and the damping oil flows through the adjusting device, the flow of the damping oil entering the second cavity is adjusted through the adjusting device, the first compression damping adjustment of the balance bar is realized, and the damping oil entering the second cavity enters the first cavity and is located at the upper side of the piston through the second connecting hole, and the damping oil in the second cavity extrudes the third sealing cover, so that the opening size of the second connecting hole changes, the second compression damping adjustment of the balance bar is realized, the balance bar is adjusted through the flow of the damping oil, so that the lateral impact force is relieved, the stability of the motorcycle is improved, and in the use process, the flow rate of the damping oil is increased when the balance bar is subjected to a large impact, the steering of the handlebar is accelerated, the large movement stroke of the piston rod and the connecting seat is caused, and the "death swing" phenomenon of the fast-moving motorcycle is prone to occur, the third sealing cover is arranged, the damping oil flowing into the second cavity at a high speed extrudes the third sealing cover and then enters the first cavity through the second connecting hole, so that the pressure in the second cavity is greater than that in the first cavity, the flow rate of the damping oil in the second cavity is reduced, the large movement stroke of the piston rod and the connecting seat caused by the rapid action is reduced, and the safety is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a perspective structural schematic diagram of an embodiment of the present application;

[0017] Figure 2 is a front view structural schematic diagram of an embodiment of the present application;

[0018] Figure 3 is an exploded structural schematic diagram of an embodiment of the present application;

[0019] Figure 4 is a perspective structural schematic diagram of the first hydraulic cylinder and the second hydraulic cylinder in the embodiment of the present application in a top view state;

[0020] Figure 5 is a perspective structural schematic diagram of the first hydraulic cylinder and the second hydraulic cylinder in the embodiment of the present application in a bottom view state;

[0021] Figure 6is a perspective view of the adjusting device in the embodiment of the present application;

[0022] Figure 7 is an exploded view of the adjusting device in the embodiment of the present application;

[0023] Figure 8 is a perspective view of the third sealing cover in the embodiment of the present application;

[0024] Figure 9 is an exploded view of the third sealing cover in the embodiment of the present application;

[0025] Figure 10 is a perspective view of the cover body in the embodiment of the present application;

[0026] Figure 11 is a perspective view of the cover body in the embodiment of the present application;

[0027] Figure 12 is a perspective view of the piston rod, the piston, the first sealing cover and the second sealing cover in the embodiment of the present application;

[0028] Figure 13 is an exploded view of the piston rod, the piston, the first sealing cover and the second sealing cover in the embodiment of the present application;

[0029] Figure 14 is a perspective view of the piston body in the embodiment of the present application. DETAILED DESCRIPTION

[0030] The present application will be further described in conjunction with the drawings and specific embodiments.

[0031] The embodiment of the present application is:

[0032] Reference Figures 1 to 5As shown, an adjustable damping balance bar comprises a first hydraulic cylinder 1, a second hydraulic cylinder 2, a piston rod 3, a piston 4, a first sealing cover 5, a second sealing cover 6, a third sealing cover 7, a support seat 8, a connecting seat 9, a first joint bearing 10, a second joint bearing 11 and an adjusting device 12, the first hydraulic cylinder 1 and the second hydraulic cylinder 2 are integrally connected, the central axis of the first hydraulic cylinder 1 is parallel to the central axis of the second hydraulic cylinder 2, the first sealing cover 5 and the second sealing cover 6 are respectively arranged at the two axial ends of the first hydraulic cylinder 1, so that a first cavity 100 is formed in the first hydraulic cylinder 1, the piston rod 3 is arranged in the first hydraulic cylinder 1, and the two ends of the piston rod 3 pass through the first sealing cover 5 and the second sealing cover 6 respectively, the piston 4 is fixedly arranged at the middle part of the piston rod 3 and is distributed in the first cavity 100, the support seat 8 is arranged at one axial end of the piston rod 3, the first joint bearing 10 is arranged on the support seat 8, the other axial end of the piston rod 3 is provided with a bumper 13, the third sealing cover 7 and the adjusting device 12 are respectively arranged at the two axial ends of the second hydraulic cylinder 2, so that a second cavity 200 is formed in the second hydraulic cylinder 2, the first hydraulic cylinder 1 and the second hydraulic cylinder 2 are provided with a first connecting hole 14 and a second connecting hole 15 which communicate the first cavity 100 and the second cavity 200, the first connecting hole 14 and the second connecting hole 15 are distributed on the two sides of the piston 4, the first connecting hole 14 is connected with the adjusting device 12 to adjust the flow size of the first connecting hole 14, the second connecting hole 15 is connected with the third sealing cover 7 to adjust the flow size of the second connecting hole 15, the connecting seat 9 is movably connected to the first hydraulic cylinder 1 and the second hydraulic cylinder 2, the second joint bearing 11 is arranged on the connecting seat 9, and the first joint bearing 10 and the second joint bearing 11 are respectively connected with the vehicle body and the handlebar to realize driving stability.

[0033] The adjustable damping balance bar is connected with the vehicle body and the handlebar through the first joint bearing 10 on the piston rod 3 and the second joint bearing 11 on the connecting seat 9 respectively, and the installation convenience of the balance bar is high and the installation occupies small space through the active adjustment of the connecting seat 9, and the use convenience is greatly improved, and when the lateral impact force of the front wheel is small, the lateral impact force acts on the piston rod 3 and the connecting seat 9, so that the end of the piston rod 3 provided with the first joint bearing 10 moves towards the first hydraulic cylinder 1 and the second hydraulic cylinder 2, thereby driving the piston 4 to extrude the damping oil in the first cavity 100, the damping oil in the first cavity 100 and located at the lower side of the piston 4 enters the second cavity 200 through the first connecting hole 14, and the damping oil flows through the adjusting device 12, the flow of the damping oil entering the second cavity 200 is adjusted through the adjusting device 12, the first compression damping adjustment of the balance bar is realized, and the damping oil entering the second cavity 200 enters the first cavity 100 and located at the upper side of the piston 4 through the second connecting hole 15, and the damping oil in the second cavity 200 changes the opening size of the second connecting hole 15 through extrusion of the third sealing cover 7, thereby realizing the second compression damping adjustment of the balance bar, and the balance bar is relieved through the flow of the damping oil, thereby improving the stability of the motorcycle, and in the use process, the flow rate of the damping oil is improved due to the large impact on the balance bar, thereby causing the steering of the handlebar to accelerate, and the large movement stroke caused by the rapid action of the piston rod 3 and the connecting seat 9 easily causes the phenomenon of “death swing” of the fast-moving motorcycle, and the third sealing cover 7 is arranged, so that the damping oil flowing into the second cavity 200 at a high speed extrudes the third sealing cover 7 and then enters the first cavity 100 through the second connecting hole 15, so that the pressure in the second cavity 200 is greater than the pressure in the first cavity 100, thereby reducing the flow rate of the damping oil in the second cavity 200 and reducing the large movement stroke caused by the rapid action of the piston rod 3 and the connecting seat 9, thereby improving the safety.

[0034] It is worth noting that the axial length of the first hydraulic cylinder 1 is equal to the axial length of the second hydraulic cylinder 2, and the diameter of the first hydraulic cylinder 1 is greater than the diameter of the second hydraulic cylinder 2, so that the oil storage in the first cavity 100 is greater than the oil storage in the second cavity 200, and in the case that the compression stroke of the piston rod 3 is the same, the volume of the extruded damping oil is unchanged, and the damping oil of the volume can flow through the adjusting device and the third sealing cover 7 more, thereby realizing better damping adjustment and further improving the driving stability of the balance bar.

[0035] In this embodiment, reference is made to Figure 6 and Figure 7As shown, the adjusting device 12 comprises a valve seat 121, a valve core 122, a valve rod 123, a rotating block 124 and a knob 125, the valve seat 121 is fixedly arranged at one axial end of the second hydraulic cylinder 2, a flow channel 126 is arranged at the central axis of the valve seat 121 and communicates with the axial two end surfaces, a first annular groove 127 is concavely arranged at the middle part of the circumferential outer surface of the valve seat 121, the first annular groove 127 is connected with the first connecting hole 14, the bottom surface of the first annular groove 127 is provided with four third connecting holes 128 which communicate with the flow channel 126, the rotating block 124 is rotatably embedded at the outer end of the flow channel 126 of the valve seat 121, a first threaded hole 129 is arranged at the central axis of the rotating block 124, the knob 125 is clamped on the rotating block 124, the valve rod 123 is arranged in the first threaded hole 129 and is threadedly connected with the first threaded hole 129, the axial outer end of the valve core 122 is clamped at the axial inner end of the valve rod 123, the axial inner end of the valve core 122 is distributed at the third connecting holes 128, and the flow size of the flow channel 126 is adjusted by rotating the valve core 122.

[0036] When the balance bar is compressed, the damping oil enters the first annular groove 127 through the first connecting hole 14, enters the flow channel 126 of the valve seat 121 through the third connecting holes 128 on the first annular groove 127, and rotates the rotating block 124 by rotating the knob 125. Since the rotating block 124 is threadedly connected with the valve seat 121, the valve rod 123 which is threadedly connected with the rotating block 124 rotates and moves along the axial direction of the flow channel 126, thereby driving the valve core 122 to move along the axial direction, so that the flow size of the damping oil passing through the third connecting holes 128 and the flow channel 126 changes, and the damping adjustment is realized. The adjusting is convenient, and the use effect is good.

[0037] Further, first annular sealing grooves 131 are concavely arranged on the circumferential outer surface of the valve seat 121 and located at the axial two sides of the first annular groove 127, first sealing rings 132 are embedded in the first annular sealing grooves 131, and second annular sealing grooves 133 are concavely arranged at the middle part of the circumferential outer surface of the valve rod 123, second sealing rings 134 are embedded in the second annular sealing grooves 133. Thus, the sealing effect is improved, and the reliability of the product is improved.

[0038] Moreover, the valve core 122 comprises a clamping part 1221, a connecting part 1222 and an adjusting part 1223 which are integrally arranged, the clamping part 1221 and the adjusting part 1223 are respectively distributed at the axial two ends of the connecting part 1222, the clamping part 1221 is in a cuboid structure, the diameter size of the adjusting part 1223 is smaller than that of the connecting part 1222, and the axial inner end of the adjusting part 1223 is in a semicircular ball structure, so as to adapt to the flow adjustment of the damping oil and facilitate the damping adjustment of the adjusting device 12.

[0039] In this embodiment, referring to Figures 8 to 11 The third sealing cover 7 includes an end cover 71, a cover body 72, a spring 73, a first clamp 74, and a cylindrical block 75. The end cover 71 and the cover body 72 are embedded at an axial end of the second hydraulic cylinder 2. The end cover 71 is located outside the cover body 72. The inner end surface of the end cover 71 is provided with a positioning block 76. The first clamp 74 is clamped between the end cover 71 and the second hydraulic cylinder 2. The outer end surface of the cover body 72 is recessed with a first positioning groove 77. One end of the spring 73 is embedded in the first positioning groove 77. The other end of the spring 73 abuts against the inner end surface of the end cover 71. The inner end surface of the cover body 72 is recessed with a second positioning groove 78. The cylindrical block 75 is embedded in the second positioning groove 78.

[0040] When the balance bar is compressed, the damping oil in the second cavity 200 acts on the cylindrical block 75, thereby pushing the cover body 72 to extrude the spring 73, so that the cover body 72 moves upward. In this way, the floating balance of the cylindrical block 75 is realized. The area of the cover body 72 blocking the second connecting hole 15 can be reduced, thereby realizing secondary damping adjustment. When a larger impact force acts on the balance bar, the flow rate of the damping oil through the second connecting hole 15 is reduced by the third sealing cover 7, thereby improving safety.

[0041] Further, the bottom surface of the second positioning groove 78 is recessed with a recess 79 in a tapered structure. The bottom of the recess 79 is provided with a fourth connecting hole 80 communicating with the first positioning groove 77. The circumferential outer surface of the cover body 72 is recessed with two third annular sealing grooves 81. The third annular sealing grooves 81 are embedded with third sealing rings 82. The damping oil or air between the cover body 72 and the end cover 71 penetrates into the second positioning groove 78 and the recess 79 through the fourth connecting hole 80, thereby realizing the transfer of the damping oil or air, ensuring the compression effect of the spring 73, and improving the compression accuracy.

[0042] And the connecting seat 9 comprises a first part 91 and a second part 92 connected integrally, the first part 91 is provided with a hole slot 93 for the first hydraulic cylinder 1 and the second hydraulic cylinder 2 to pass through and a through slot 94 connecting the hole slot 93 with the outside, the first part 91 is provided with an extension part 95 on both sides of the through slot 94, the two extension parts 95 are coaxially provided with a first threaded hole 96, the first threaded hole 96 is threadedly connected with a first bolt 97, the two extension parts 95 are moved towards each other through the first bolt 97, the clamping of the first hydraulic cylinder 1 and the second hydraulic cylinder 2 is realized, the second part 92 is provided with a mounting hole 98 for mounting the second knuckle bearing 11, the middle part of the side surface of the first part 91 is provided with a hollow part 99, the first part 91 is fixed and disassembled with the first hydraulic cylinder 1 and the second hydraulic cylinder 2 through the tightness of the first bolt 97, and then the mounting position of the connecting seat 9 is adjusted, so that the mounting of different vehicle models is suitable, the adjustment is convenient, and the occupied space is small.

[0043] In the embodiment, reference is made to Figure 12 With Figure 13 As shown in the drawings, the first sealing cover 5 and the second sealing cover 6 each comprise a locking ring 51, an elastic block 52, an elastic gasket 53, a sealing block 54 and an elastic sleeve 55, the locking ring 51, the elastic block 52, the elastic gasket 53 and the sealing block 54 are embedded at one end of the first hydraulic cylinder 1 in the axial direction and are sequentially distributed from the outside to the inside;

[0044] The locking ring 51 comprises a ring body 511, the middle part of the ring body 511 is provided with a first mounting hole 512 for the piston rod 3 to pass through, the outer end surface of the ring body 511 is provided with a first inclined surface 513, and a clamping notch 514 is arranged around the first inclined surface 513;

[0045] The elastic block 52 comprises a body 521 in a cylindrical structure, the middle part of the body 521 is provided with a second mounting hole 522 for the piston rod 3 to pass through, the outer end surface and the inner end surface of the body 521 and located at the side of the second mounting hole 522 are respectively provided with a second annular groove 523 and a third annular groove 524, so that a first convex ring 525 is formed between the second annular groove 523 and the second mounting hole 522, a second convex ring 526 is formed between the third annular groove 524 and the second mounting hole 522, and the elastic gasket 53 is covered on the third annular groove 524;

[0046] The sealing block 54 includes a first sealing block 541 and a second sealing block 542 that are cylindrical and integrally connected. The middle portions of the first sealing block 541 and the second sealing block 542 are respectively provided with a third mounting hole 543 and a fourth mounting hole 544 for the piston rod 3 to pass through. The third mounting hole 543 and the fourth mounting hole 544 are coaxially distributed. The diameter of the third mounting hole 543 is larger than the diameter of the fourth mounting hole 544. The elastic sleeve 55 is embedded in the fourth mounting hole 544. The diameter of the first sealing block 541 is larger than the diameter of the second sealing block 542. A notch 545 is provided on the upper side of the first sealing block 541.

[0047] Thus, during the sliding motion of the piston rod 3, the second annular groove 523 and the third annular groove 524 cause the first convex ring 525 and the second convex ring 526 to elastically deform and adhere to the outer surface of the piston rod 3. When the damping oil squeezes the first sealing cap 5 or the second sealing cap 6, it causes the elastic pad 53 to abut against the second convex ring 526, thereby providing better support performance and allowing the second convex ring 526 to be squeezed and deformed downwards, thereby increasing its force of adhesion to the surface of the piston rod 3, thereby removing the damping oil from the surface of the piston rod 3 and improving the safety of use.

[0048] Furthermore, refer to Figure 13 and Figure 14 As shown, the piston rod 3 has a first through hole 31 along its radial direction. The piston 4 includes a piston body 41, an upper cover 42, a lower cover 43, a second clamp 44, a fourth sealing ring 45, a sealing sleeve 46, and a connecting rod 47, all sleeved on the piston rod 3. The upper cover 42 and the lower cover 43 respectively cover the axial ends of the piston body 41. A fourth annular sealing groove 48 is recessed in the middle of the outer circumference of the piston body 41. A fifth annular sealing groove 49 is recessed in the bottom surface of the fourth annular sealing groove 48. The second clamp 44 is embedded in the fifth annular sealing groove 49. The sealing sleeve 46 is embedded in the fourth annular sealing groove 48 and fitted onto the second clamp 44. The piston body 41 is provided with a second through hole 50 on the upper side of the fourth annular sealing groove 48, which mates with the first through hole 31. The connecting rod 47 passes through the first through hole 31 and the second through hole 50. The fourth sealing ring 45 is embedded inside the piston body 41 and distributed between the fourth annular sealing groove 48 and the connecting rod 47, thereby improving the firmness and ease of installation of the piston 4, and improving the fit between the piston 4 and the inner wall of the first hydraulic cylinder 1, thus enhancing the shock absorption effect of the balance bar.

[0049] Although the present application has been particularly shown and described with respect to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details can be made therein without departing from the spirit and scope of the application as defined in the appended claims.

Claims

1. An adjustable-damping balance bar, characterized by: The utility model provides a kind of hydraulic cylinder, including first hydraulic cylinder, second hydraulic cylinder, piston rod, piston, first sealing cover, second sealing cover, third sealing cover, support seat, connecting seat, first joint bearing, second joint bearing and adjusting device, first hydraulic cylinder, second hydraulic cylinder are integrally connected, the central axis of first hydraulic cylinder is parallel with the central axis of second hydraulic cylinder, first sealing cover, second sealing cover are covered respectively in the axial both ends of first hydraulic cylinder, so that first hydraulic cylinder is formed into first cavity, piston rod is passed in first hydraulic cylinder, and the both ends of piston rod are passed through first sealing cover and second sealing cover respectively, the piston is fixed in the middle part of piston rod, and is distributed in first cavity, support seat is located in the axial one end of piston rod, first joint bearing is located on support seat, the axial other end of piston rod is equipped with anti-collision block, third sealing cover, adjusting device are respectively located in the axial both ends of second hydraulic cylinder, so that second hydraulic cylinder is formed into second cavity, first hydraulic cylinder, second hydraulic cylinder are equipped with first connecting hole and second connecting hole for communicating first cavity and second cavity, first connecting hole, second connecting hole are distributed in the both sides of piston, and first connecting hole is connected with adjusting device, the flow size of first connecting hole is adjusted, second connecting hole is connected with third sealing cover, the flow size of second connecting hole is adjusted, connecting seat is movably connected on first hydraulic cylinder, second hydraulic cylinder, second joint bearing is located on connecting seat, is connected with vehicle body and handlebar respectively by first joint bearing, second joint bearing, realizes driving stability; The third sealing cover includes an end cover, a cover body, a spring, a first clamp, and a cylindrical block. The end cover and the cover body are embedded in the axial one end of the second hydraulic cylinder. The end cover is located outside the cover body. The inner end surface of the end cover protrudes a positioning block. The first clamp is clamped between the end cover and the second hydraulic cylinder. The outer end surface of the cover body is recessed with a first positioning groove. One end of the spring is embedded in the first positioning groove. The other end of the spring abuts against the inner end surface of the end cover. The inner end surface of the cover body is recessed with a second positioning groove. The cylindrical block is embedded in the second positioning groove.

2. The adjustable-damping sway bar of claim 1, wherein: The adjusting device includes a valve seat, a valve core, a valve rod, a rotating block, and a knob. The valve seat is fixedly arranged at the axial one end of the second hydraulic cylinder. A flow channel is arranged at the central axis of the valve seat and communicates with the axial both end surfaces. A first annular groove is recessed in the middle part of the circumferential outer surface of the valve seat. The first annular groove is connected with the first connecting hole. The bottom surface of the first annular groove is provided with at least three third connecting holes which communicate with the flow channel. The rotating block is rotatably embedded at the outer end of the flow channel of the valve seat. A first threaded hole is arranged at the central axis of the rotating block. The knob is clamped on the rotating block. The valve rod is passed through and threadedly connected with the first threaded hole. The axial outer end of the valve core is clamped on the axial inner end of the valve rod. The axial inner end of the valve core is distributed at the third connecting holes. The flow size of the flow channel is adjusted by rotating the valve core.

3. The adjustable-damping sway bar of claim 2, wherein: First annular sealing grooves are recessed on the circumferential outer surface of the valve seat and located on the axial both sides of the first annular groove. First sealing rings are embedded in the first annular sealing grooves.

4. The adjustable-damping sway bar of claim 3, wherein: The middle part of the circumferential outer surface of the valve rod is concave and provided with a second annular sealing groove, and the second sealing groove is embedded with a second sealing ring.

5. The adjustable-damping sway bar of claim 4, wherein: The valve core comprises an integrated clamping part, a connecting part and an adjusting part, the clamping part and the adjusting part are respectively distributed at the axial ends of the connecting part, the clamping part is in a cuboid structure, the diameter size of the adjusting part is smaller than that of the connecting part, and the axial inner end of the adjusting part is in a semispherical structure.

6. A damper adjustable sway bar according to any one of claims 1 to 5 wherein: The bottom surface of the second positioning groove is concave and provided with a tapered groove, and the bottom of the groove is provided with a fourth connecting hole in communication with the first positioning groove.

7. The adjustable-damping sway bar of claim 6, wherein: The circumferential outer surface of the cover is concave and provided with at least two third annular sealing grooves, and the third annular sealing grooves are embedded with third sealing rings.

8. The adjustable-damping gimbal of claim 1, wherein: The axial length of the first hydraulic cylinder is equal to that of the second hydraulic cylinder, and the diameter of the first hydraulic cylinder is larger than that of the second hydraulic cylinder.

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