Stay wire oil pressure balance valve and two-wheeled vehicle

Abstract

The utility model relates to a stay wire oil pressure balance valve and a two-wheeled vehicle. The stay wire oil pressure balance valve comprises a valve body, two I-stage cavities, a first II-stage cavity, a second II-stage cavity and a transition cavity are axially formed in the valve body, the two I-stage cavities are communicated with the transition cavity through transition oil ways respectively, the first II-stage cavity is communicated with the transition cavity through a first oil way, and the second II-stage cavity is communicated with the transition cavity through a second oil way. A first elastic piece and a second elastic piece are respectively arranged in the first II-stage cavity and the second II-stage cavity; the number of the driving pistons is two, and the driving pistons are respectively arranged in the two I-stage cavities; the number of the driven pistons is two, one driven piston is arranged in the first II-stage cavity and is provided with a first elastic piece, and the other driven piston is arranged in the second II-stage cavity and is provided with a second elastic piece; and the elastic coefficient of the first elastic piece is smaller than that of the second elastic piece, so that when any driving piston is driven, the driven piston in the first II-stage cavity is preferentially driven by oil.

Description

Technical Field

[0001] This utility model relates to the field of bicycle accessories technology, specifically to a cable-operated hydraulic balance valve and a two-wheeled vehicle. Background Technology

[0002] Most bicycles currently use independent braking systems for the front and rear wheels. During braking, in order to obtain reasonable deceleration, the rider needs to properly distribute the operating force of both hands so that the front and rear tires can make full use of the road surface's coefficient of friction.

[0003] However, in actual riding, this is difficult for riders to achieve. Because the rear wheel bears most of the vehicle's weight during normal riding or acceleration, it experiences greater friction than the front wheel. But during braking, due to inertia, the vehicle's center of gravity shifts to the front wheel. In high-speed riding requiring emergency braking, braking only the front wheel can cause instability in the vehicle's center of gravity, potentially leading to a fishtailing risk. Therefore, we propose a cable-operated hydraulic balance valve and a two-wheeled vehicle. Utility Model Content

[0004] This application provides a cable-operated hydraulic balance valve and a two-wheeled vehicle to at least solve the problem in the prior art that when emergency braking is required at high speeds, if only the front wheel is braked, the vehicle's center of gravity becomes unstable, which may lead to a fishtailing risk.

[0005] In a first aspect, this application provides a cable-operated hydraulic balance valve, which is used in conjunction with a vehicle frame, comprising:

[0006] The valve body has two primary chambers, a first secondary chamber, a second secondary chamber, and a transition chamber axially formed thereon. The two primary chambers are connected to the transition chamber via transition oil passages. The first secondary chamber is connected to the transition chamber via a first oil passage. The second secondary chamber is connected to the transition chamber via a second oil passage. Each of the primary chambers, the first secondary chamber, and the second secondary chamber contains communicating oil. The first secondary chamber and the second secondary chamber are respectively provided with a first elastic element and a second elastic element.

[0007] Two active pistons are respectively disposed in the two stage I cavities;

[0008] There are two driven pistons, one of which is disposed in the first stage II cavity and equipped with the first elastic element, and the other driven piston is disposed in the second stage II cavity and equipped with the second elastic element;

[0009] Wherein, when the elastic coefficient of the first elastic element is less than that of the second elastic element to achieve the driving of any of the active pistons, the driven piston in the first stage II cavity is preferentially driven by the oil.

[0010] Optionally, the inner diameter of the second oil passage is smaller than the inner diameter of the first oil passage.

[0011] Optionally, the two active pistons are connected to two brake levers respectively via a first cable and a second cable, the driven piston in the first stage II chamber is connected to the front disc brake caliper via a third cable, and the driven piston in the second stage II chamber is connected to the rear disc brake caliper via a fourth cable.

[0012] Optionally, the first stage II chamber / second stage II chamber has a double-ended open structure, wherein the driven piston includes:

[0013] A Class II sleeve end threaded sleeve, the thread of which is fitted to the second end of the first Class II cavity / second Class II cavity;

[0014] A Class II screw plug, whose threads are fitted to the first end of the first Class II cavity / second Class II cavity, so as to cooperate with the Class II sleeve end screw to seal both ends of the first Class II cavity / second Class II cavity;

[0015] A second-stage piston rod is movably assembled in the first second-stage cavity / second second-stage cavity, and a second-stage step is provided in the middle of the rod. A second-stage piston sleeve is fixedly sleeved on the second-stage step. The first end of the stroke of the second-stage piston rod is limited by the second-stage sleeve end screw sleeve, and the last end of the stroke is limited by the second-stage screw plug.

[0016] Optionally, the two ends of the first elastic member / second elastic member respectively abut against the inner end of the second-level step portion and the second-level screw plug.

[0017] Optionally, the first ends of the third pull wire and the fourth pull wire are both formed with end pull wire heads, and the end pull wire heads are embedded in the first end of the stage II piston column, wherein the first end of the stage II piston column is movably inserted into the first movable hole opened in the middle of the stage II screw plug.

[0018] Optionally, the first-stage cavity has a double-ended open structure, wherein the active piston includes:

[0019] A Class I sleeve end threaded sleeve, the thread of which is fitted to the first end of the Class I cavity;

[0020] A Class I screw plug, whose threads are fitted to the second end of the Class I cavity, so as to cooperate with the Class I sleeve end screw to seal both ends of the Class I cavity;

[0021] A first-stage piston rod is movably assembled in the first-stage cavity, and a first-stage step is provided in the middle of the first-stage step. A first-stage piston sleeve is fixedly sleeved on the first-stage step. The first end of the stroke of the first-stage piston rod is limited by the first-stage sleeve end screw sleeve, and the last end of the stroke is limited by the first-stage screw plug.

[0022] A cable clamp is disposed at the second end of the first-stage piston rod and is fixed to the first / second cable by a cable clamping screw, so as to drive the first-stage piston rod to move in the first-stage cavity when the first / second cable is pulled.

[0023] Optionally, the first pull wire and the second pull wire near the end of the Class I sleeve end threaded sleeve, and the third pull wire and the fourth pull wire near the end of the Class II sleeve end threaded sleeve, each have a pull wire sleeve, which is embedded in the sleeve groove formed at the free end of the Class I sleeve end threaded sleeve / Class II sleeve end threaded sleeve.

[0024] Optionally, the transition cavity is an open structure with a single-end opening, and a transition cavity oil seal is fitted at the opening of the transition cavity.

[0025] Secondly, this application provides a two-wheeled vehicle that includes the cable-operated hydraulic pressure balance valve described in the first aspect above.

[0026] Compared with related technologies, the cable-operated hydraulic balance valve and the two-wheeled vehicle provided in this application have at least the following technical advantages:

[0027] This system ensures that when either brake lever is engaged, the rear disc brake caliper is activated first to brake the vehicle and maintain its balance. After continuous gripping force is applied, both the rear and front disc brake calipers engage simultaneously to provide balanced braking to the front and rear wheels. This maintains a reasonable coordination between the brake levers for braking the bicycle's front and rear wheels, making the braking force distribution simpler, more efficient, and more precise compared to manual braking. It also significantly shortens the braking distance and reduces the risk of the bicycle skidding. Furthermore, when both brake levers are engaged simultaneously, the hydraulic fluid in the corresponding two first-stage II chambers is driven simultaneously, increasing the hydraulic fluid injection speed, resulting in faster braking response and a significantly shorter braking distance, further reducing the risk of the bicycle skidding.

[0028] Details of one or more embodiments of this application are set forth in the following drawings and description to make other features, objects and advantages of this application more readily apparent. Attached Figure Description

[0029] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a perspective view of a cable-operated hydraulic pressure balance valve according to an exemplary embodiment.

[0031] Figure 2 This is a perspective view of a valve body shown according to an exemplary embodiment.

[0032] Figure 3 This is a schematic diagram of an explosion of a cable-operated hydraulic pressure balance valve according to an exemplary embodiment.

[0033] Figure 4 This is a first cross-sectional view of a cable-operated hydraulic pressure balance valve according to an exemplary embodiment.

[0034] Figure 5 This is a second cross-sectional view of a cable-operated hydraulic pressure balance valve according to an exemplary embodiment.

[0035] Explanation of reference numerals in the attached drawings: Valve body 10: Stage I chamber 101; First Stage II chamber 102; Second Stage II chamber 103; Transition chamber 104; Transition oil passage 105; First oil passage 106; Second oil passage 107;

[0036] Driven piston 20: Stage II piston post 201; Stage II stepped portion 202; Stage II piston sleeve 203; First elastic element 204; Second elastic element 205; Stage II sleeve end threaded sleeve 206; Stage II screw plug 207;

[0037] Active piston 30: Stage I piston post 301; Stage I stepped section 302; Stage I piston sleeve 303; Stage I screw plug 304; cable clamp 305; wire clamping screw 306; Stage I sleeve end screw sleeve 307; sleeve groove;

[0038] Transition cavity oil seal 40; Pull wires: first pull wire 501; second pull wire 502; third pull wire 503; fourth pull wire 504; pull wire sleeve 505; first pull wire head 506; last pull wire head 507; sealing ring 60. Detailed Implementation

[0039] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] In related technologies, the current market generally achieves the distribution of brake fluid during braking by adding a hydraulic distribution valve to the vehicle's hydraulic disc brake system. However, after a period of use, as the brake pads wear, the piston in the brake pump will require more brake fluid pressure to move forward to brake. Insufficient brake fluid pressure will lead to hydraulic distribution failure, and thus brake failure.

[0043] Based on the above, this utility model provides a cable-operated hydraulic balance valve and a two-wheeled vehicle, which will be described in detail below with reference to specific embodiments and accompanying drawings.

[0044] Example 1

[0045] This utility model embodiment provides a pull-wire hydraulic pressure balance valve. Figure 1 This is a perspective view of a cable-operated hydraulic pressure balance valve according to an exemplary embodiment. Figure 2 This is a perspective view of a valve body shown according to an exemplary embodiment. Figure 3 This is a schematic diagram of an explosion of a cable-operated hydraulic pressure balance valve according to an exemplary embodiment. Figure 4 This is a first cross-sectional view of a cable-operated hydraulic pressure balance valve according to an exemplary embodiment. Figure 5 This is a second cross-sectional view of a cable-operated hydraulic pressure balance valve according to an exemplary embodiment. Figure 1-5 As shown, it is used with a frame, including:

[0046] The valve body 10 has two primary chambers 101, a first secondary chamber 102, a second secondary chamber 103, and a transition chamber 104 axially formed thereon. The two primary chambers 101 are connected to the transition chamber 104 through a pre-formed transition oil passage 105. The first secondary chamber 102 is connected to the transition chamber 104 through a pre-formed first oil passage 106. The second secondary chamber 103 is connected to the transition chamber 104 through a pre-formed second oil passage 107. The primary chambers 101, 102, 103, and 104 contain brake fluid that is connected to each other. The first secondary chamber 102 and the second secondary chamber 103 are respectively provided with a first elastic element 204 and a second elastic element 205.

[0047] There are two active pistons 30, which are respectively located in two stage I chambers 101;

[0048] There are two driven pistons 20, one of which is disposed in the first stage II cavity 102 and equipped with the first elastic element 204, and the other driven piston 20 is disposed in the second stage II cavity 103 and equipped with the second elastic element 205.

[0049] In this embodiment, the elastic coefficient of the first elastic element 204 is less than that of the second elastic element 205 so that when either the active piston 30 is driven, the driven piston 20 in the first stage II chamber 102 is preferentially driven by the oil. In this embodiment, the elastic coefficient of the second elastic element 205 is more than 1.5 times that of the first elastic element 204 to ensure the above-mentioned function.

[0050] In the above embodiment, the two active pistons 30 are connected to the two brake levers respectively through the first cable 501 and the second cable 502. The driven piston 20 in the first stage II cavity 102 is connected to the front wheel disc brake caliper through the third cable 503. The driven piston 20 in the second stage II cavity 103 is connected to the rear wheel disc brake caliper through the fourth cable 504.

[0051] See attached document Figure 1-5 In this embodiment, when either brake lever engages the brake, the first pull cable 501 / second pull cable 502 pulls the active piston 30 to move within the first-stage chamber 101, driving the hydraulic fluid through the transition oil passage 105 into the transition chamber 104, and then through the first oil passage 106 and the second oil passage 107 into the first second-stage chamber 102 and the second second-stage chamber 103, respectively, driving the two driven pistons 20 to move, thereby pulling the front wheel disc brake caliper and the rear wheel disc brake caliper to clamp the front / rear wheel discs, achieving balanced braking;

[0052] It should be noted that the main design of this application embodiment is that the elastic coefficient of the first elastic element 204 is less than that of the second elastic element 205. Therefore, when the oil enters the first secondary cavity 102 and the second secondary cavity 103, the pressure of the oil first drives the driven piston 20 in the first secondary cavity 102 to move, thereby realizing that the rear wheel disc brake caliper first clamps the rear wheel disc and continuously applies gripping force. As the first elastic element 204 continues to compress, its elastic force continues to increase until its elastic force is greater than the reserved pressure of the second elastic element 205. Then, the oil turns to continuously input into the second secondary cavity 103 to drive the driven piston 20 in the second secondary cavity 103 to move, thereby realizing that the front wheel disc brake caliper simultaneously clamps the front wheel disc and the front and rear wheels brake synchronously.

[0053] Further, refer to the appendix Figure 5 The inner diameter of the second oil passage 107 is smaller than that of the first oil passage 106. In this embodiment, the ratio of the aperture of the first oil passage 106 to the aperture of the second oil passage 107 is 4:1. Preferably, the aperture of the first oil passage 106 is 2 mm and the aperture of the second oil passage 107 is 0.5 mm, so that the amount of oil pressed into the second stage II cavity 103 through the second oil passage 107 in the same time is greater than the amount of oil pressed into the first stage II cavity 102. This, combined with the elastic coefficient settings of the first elastic element 204 and the second elastic element 205, enables the rear disc brake caliper to start working before the front disc brake caliper, and after continuous application of gripping force, enables the rear disc brake caliper and the front disc brake caliper to work simultaneously, achieving synchronous and balanced braking of the front and rear wheels.

[0054] It is understandable that when both brake levers are held simultaneously, the oil in the two corresponding first stage II chambers 102 is driven simultaneously, the oil pressure is increased, and correspondingly, the braking response of the two brake levers is also faster.

[0055] Continue to refer to the appendix Figure 3-5 In this embodiment, the first stage II cavity 102 / second stage II cavity 103 is a double-ended open structure, wherein the driven piston 20 includes:

[0056] The Class II sleeve end threaded sleeve 206 is threaded and assembled at the second end of the first Class II cavity 102 / second Class II cavity 103;

[0057] The Class II screw plug 207 is threadedly fitted to the first end of the first Class II cavity 102 / second Class II cavity 103 to cooperate with the Class II sleeve end screw sleeve 206 to seal both ends of the first Class II cavity 102 / second Class II cavity 103; the two ends of the first elastic member 204 / second elastic member 205 respectively abut against the inner end of the Class II step portion 202 and the Class II screw plug 207;

[0058] The second-stage piston column 201 is movably assembled in the first second-stage cavity 102 / second second-stage cavity 103, and has a second-stage step portion 202 in its middle. The second-stage piston sleeve 203 is fixedly sleeved on the second-stage step portion 202. The first end of the stroke of the second-stage piston column 201 is limited by the second-stage sleeve end screw sleeve 206, and the last end of the stroke is limited by the second-stage screw plug 207.

[0059] The first ends of the third pull wire 503 and the fourth pull wire 504 are both formed with end pull wire heads 507. The end pull wire heads 507 are embedded in the first end of the second-stage piston column 201. The first end of the second-stage piston column 201 is movably inserted into the first movable hole opened in the middle of the second-stage screw plug 207.

[0060] In the above embodiment, both the third pull wire 503 and the fourth pull wire 504 have a pull wire sleeve 505 at the end near the II-stage sleeve end threaded sleeve 206. The pull wire sleeve 505 is embedded in the sleeve groove formed at the free end of the II-stage sleeve end threaded sleeve 206. During assembly, under the condition of ensuring a clean assembly environment, the first end of the third pull wire 503 / fourth pull wire 504 passes through the second end of the II-stage piston post 201 and through the first end of the II-stage piston post 201. Then, the first end of the third pull cable 503 / fourth pull cable 504 is fixed to the end pull cable head 507 by the clamping device. The pull cable sleeves 505 on the third pull cable 503 and the fourth pull cable 504 are embedded in the sleeve groove formed at the free end of the Class II sleeve end screw sleeve 206 to complete the assembly. When loading the vehicle, it is only necessary to connect the second end of the third pull cable 503 and the fourth pull cable 504 to the pull rod of the front wheel disc brake caliper / rear wheel disc brake caliper to complete the loading conveniently.

[0061] Continue to refer to the appendix Figure 3-4 In this embodiment, the first-stage cavity 101 has a double-ended open structure, wherein the active piston 30 includes:

[0062] The Class I sleeve end threaded sleeve 307 is threaded and assembled at the first end of the Class I cavity 101;

[0063] The Class I plug 304 is threaded onto the second end of the Class I cavity 101 to cooperate with the Class I sleeve end plug 307 to seal both ends of the Class I cavity 101;

[0064] A first-stage piston rod 301 is movably assembled in a first-stage cavity 101, and a first-stage step portion 302 is provided in the middle of the first-stage step portion 302. A first-stage piston sleeve 303 is fixedly sleeved on the first-stage step portion 302. The first end of the stroke of the first-stage piston rod 301 is limited by the first-stage sleeve end screw sleeve 307, and the last end of the stroke is limited by the first-stage screw plug 304.

[0065] A cable clamp 305 is disposed at the second end of the first-stage piston column 301 and is fixed to the first cable 501 / second cable 502 by a cable clamping screw 306, so as to drive the first-stage piston column 301 to move within the first-stage cavity 101 when the first cable 501 / second cable 502 is pulled.

[0066] In the above embodiment, both the first pull wire 501 and the second pull wire 502 have a pull wire sleeve 505 at the end near the first-stage sleeve end threaded sleeve 307. The pull wire sleeve 505 is embedded in the sleeve groove formed at the free end of the first-stage sleeve end threaded sleeve 307. During assembly, under the condition of ensuring a clean assembly environment, the first end of the first pull wire 501 / second pull wire 502 passes through the pull wire clamp 305 and enters from the second end of the first-stage piston post 301, and exits from the first end of the first-stage piston post 301. Then, the first end of the first pull wire 501 / second pull wire 502 is fixed to the first end pull wire head 506 by a clamping device. It can be understood that... The first end pull cable head 506 is used for quick connection of the brake lever; the pull cable sleeves 505 on the first pull cable 501 and the second pull cable 502 are embedded in the sleeve groove formed at the free end of the Class II sleeve end screw sleeve 206 to complete the assembly. When installing the vehicle, the first ends of the first pull cable 501 and the second pull cable 502 are respectively connected to the two brake levers. After pulling the first pull cable 501 / second pull cable 502 to adjust the brake tightness and brake stroke of the brake lever, the clamping screw 306 is installed on the pull cable clamp 305 to fix the position of the first pull cable 501 and the second pull cable 502 on the pull cable hydraulic balance valve in this embodiment, and the vehicle installation can be completed conveniently.

[0067] Furthermore, in this embodiment, the transition cavity 104 is an open structure with a single-end opening, and a transition cavity oil seal 40 is installed at the opening of the transition cavity 104 to close the opening of the transition cavity 104, forming a closed transition cavity 104 structure.

[0068] Furthermore, in this embodiment, sealing rings 60 are provided at the assembly points of the transition cavity oil seal plug 40, the Class I screw plug 304, the Class I sleeve end screw sleeve 307, the Class II sleeve end screw sleeve 206, and the Class II screw plug 207 with the valve body 10 to ensure that the oil filling the valve body 10 does not leak.

[0069] Understandably, in my country and most countries around the world, the right handbrake controls the rear wheel brake pump corresponding to the rear wheel brake, and the left handbrake controls the front wheel brake pump corresponding to the front wheel brake. When braking, it is inevitable that emergency braking of the front wheel may cause the vehicle center to tilt forward, resulting in the vehicle fishtailing and overturning. However, after connecting the cable hydraulic pressure balance valve in this embodiment, when either brake lever is squeezed (left handbrake or right handbrake), the rear disc brake caliper can be activated before the front disc brake caliper. After continuous gripping force is applied, the rear disc brake caliper and the front disc brake caliper work simultaneously, and the front and rear wheels brake synchronously and in a balanced manner.

[0070] During braking, the opening force of the first elastic element 504 is F1; the opening force of the second elastic element 506 is F2, F1 < F2; in this embodiment, both the first elastic element 504 and the second elastic element 506 are springs (compression springs).

[0071] Under normal conditions, the oil passages of the two primary chambers 101, the first secondary chamber 102, the second secondary chamber 103, and the transition chamber 104 are all connected. When any brake lever is squeezed:

[0072] S1. The first cable 501 and the second cable 502 provide the driving force F to the active piston 30, which is converted into the initial oil pressure Pa for the first braking by the active piston 30. The initial oil pressure Pa drives the oil through the transition oil passage 105 to the transition chamber 104. Then, the first path of the oil in the transition chamber 104 reaches the first stage II chamber 102 through the first oil passage 106, overcoming the opening force F1 of the first elastic element 504, and driving the driven piston 20 in the first stage II chamber 102 to move. Then, the third cable 503 pulls the rear wheel disc brake caliper to brake the rear wheel first. The second path of the oil reaches the second stage II chamber 103 through the second oil passage 107, but the second path of the oil fails to overcome the opening force F2 of the second elastic element 506, and the front wheel disc brake caliper does not move.

[0073] S2. When the driving force F provided by the first cable 501 / second cable 502 to the active piston 30 reaches the preset oil pressure threshold Pb, the opening force F1 of the first elastic element 504 gradually increases to F1', F1'≥F2. The second oil overcomes the opening force F2 of the second elastic element 506 and drives the driven piston 20 in the second stage II cavity 103 to move. Then, the fourth cable 504 pulls the front wheel disc brake caliper to brake the front wheel synchronously, realizing synchronous balanced braking of the front and rear wheels.

[0074] It is understandable that when both brake levers are held simultaneously, the oil in the two corresponding first stage II chambers 102 is driven simultaneously, the oil pressure is increased, and the braking response of the two brake levers is faster, the braking distance is significantly shortened, and the risk of bicycle fishtailing is reduced.

[0075] In summary, this application, through the assembly of a cable-operated hydraulic balance valve, enables the rear disc brake caliper to be activated first when either brake lever is engaged, thus braking the vehicle first and maintaining its center of gravity balance. After continuous gripping force is applied, the rear and front disc brake calipers work simultaneously to provide synchronous and balanced braking to the front and rear wheels of the vehicle. This maintains a reasonable coordination of braking force distribution between the front and rear wheels by either brake lever, which is simpler, more efficient, and more precise than manual braking. The braking distance is also significantly shortened, reducing the risk of the bicycle skidding. Furthermore, when both brake levers are engaged simultaneously, the hydraulic fluid in the corresponding two first-stage II chambers 102 is driven simultaneously, increasing the hydraulic fluid injection speed, resulting in faster braking response and a significantly shorter braking distance, further reducing the risk of the bicycle skidding.

[0076] Furthermore, this application achieves synchronized braking of the front and rear wheels and maintains stable vehicle braking performance without altering the original braking structure of the bicycle to accommodate cable disc brakes and while reducing costs.

[0077] Example 2

[0078] Embodiment 2 of this application provides a two-wheeled vehicle, including the cable-operated hydraulic pressure balance valve of Embodiment 1 described above.

[0079] The two-wheeled vehicle in this embodiment is not limited to bicycles or electric bicycles, but can also be extended to vehicles with two-wheel braking systems, such as motorcycles.

[0080] Other undescribed structures are described in Example 1.

[0081] In summary, the cable-operated hydraulic balance valve and two-wheeled vehicle provided by this utility model embodiment enable the rear disc brake caliper to be activated first when either brake lever is engaged, thus braking the vehicle first and maintaining its center balance. After continuous application of gripping force, the rear and front disc brake calipers work simultaneously to provide synchronous and balanced braking to the front and rear wheels of the vehicle. This maintains a reasonable coordination of braking force distribution between the front and rear wheels by either brake lever, which is simpler, more efficient, and more precise than manual braking. The braking distance is also significantly shortened, reducing the risk of the bicycle skidding. Furthermore, when both brake levers are engaged simultaneously, the hydraulic fluid in the corresponding two first stage II chambers 102 is driven simultaneously, increasing the hydraulic fluid injection speed, resulting in faster braking response and a significantly shorter braking distance, further reducing the risk of the bicycle skidding.

[0082] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] The above embodiments merely illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A stay rod oil pressure balance valve which is used in conjunction with a vehicle frame, characterized by, The utility model relates to a kind of hydraulic brake master cylinder, including: Valve body, two I-grade cavities are opened with its axial, first II-grade cavity, second II-grade cavity and transition cavity, two the I-grade cavity is communicated with the transition cavity by transition oil circuit respectively, the first II-grade cavity is communicated with the transition cavity by first oil circuit, the second II-grade cavity is communicated with the transition cavity by second oil circuit, first elastic member and second elastic member are respectively equipped in the first II-grade cavity and the second II-grade cavity; Two driving pistons are arranged in two I-grade cavities respectively; Two driven pistons are arranged in the first II-grade cavity and the second II-grade cavity respectively and equipped with first elastic member and second elastic member; The elastic coefficient of the first elastic member is less than the elastic coefficient of the second elastic member to realize that the driven piston in the first II-grade cavity is driven by oil when any driving piston is driven.

2. The stay rod oil pressure balance valve according to claim 1, wherein The inner diameter of the second oil circuit is less than the inner diameter of the first oil circuit.

3. The stay wire oil pressure balance valve according to claim 1, wherein The first and second driving pistons are connected to two brake levers by first and second pull wires respectively, the driven piston in the first II-grade cavity is connected to rear-wheel disc brake caliper by third pull wire, and the driven piston in the second II-grade cavity is connected to front-wheel disc brake caliper by fourth pull wire.

4. The stay rod oil pressure balance valve according to claim 3, wherein The first and second II-grade cavities are double-end open structures, wherein the driven piston includes: A II-grade sleeve end screw is threadedly assembled at the second end of the first / second II-grade cavity; A II-grade screw plug is threadedly assembled at the first end of the first / second II-grade cavity to close the two ends of the first / second II-grade cavity together with the II-grade sleeve end screw; A II-grade piston column is movably assembled in the first / second II-grade cavity, and a II-grade stepped portion is arranged in the middle of the II-grade piston column, and a II-grade piston sleeve is fixedly sleeved on the II-grade stepped portion, wherein the first end of the II-grade piston column is limited by the II-grade sleeve end screw, and the last end of the II-grade piston column is limited by the II-grade screw plug.

5. The stay wire oil pressure balance valve according to claim 4, wherein The two ends of the first / second elastic member abut against the II-grade stepped portion and the inner end of the II-grade screw plug respectively.

6. The stay wire oil pressure balance valve according to claim 4, wherein The first ends of the third and fourth pull wires are formed with terminal pull wire heads, and the terminal pull wire heads are embedded in the first end of the II-grade piston column, wherein the first end of the II-grade piston column is movably arranged in a first movable hole formed in the middle of the II-grade screw plug.

7. The stay wire oil pressure balance valve according to claim 4, wherein The I-grade cavity is a double-end open structure, wherein the driving piston includes: An I-grade sleeve end screw is threadedly assembled at the first end of the I-grade cavity; An I-grade screw plug is threadedly assembled at the second end of the I-grade cavity to close the two ends of the I-grade cavity together with the I-grade sleeve end screw; An I-grade piston column is movably assembled in the I-grade cavity, and an I-grade stepped portion is arranged in the middle of the I-grade piston column, and an I-grade piston sleeve is fixedly sleeved on the I-grade stepped portion, wherein the first end of the I-grade piston column is limited by the I-grade sleeve end screw, and the last end of the I-grade piston column is limited by the I-grade screw plug. A pull wire clamp head is arranged at the second end of the first-stage piston rod and is fixed with the first pull wire / second pull wire through a wire pressing screw, so as to drive the first-stage piston rod to move in the first-stage cavity when the first pull wire / second pull wire is pulled.

8. The stay wire oil pressure balance valve according to claim 7, wherein The first pull wire and the second pull wire are close to one end of the first-stage sleeve end screw, and the third pull wire and the fourth pull wire are close to one end of the second-stage sleeve end screw, and the pull wire sleeve is embedded in the sleeve groove formed at the free end of the first-stage sleeve end screw / second-stage sleeve end screw.

9. The stay wire oil pressure balance valve according to claim 1, wherein The transition cavity is an open structure with a single end opening, and a transition cavity oil seal plug is arranged at the opening of the transition cavity.

10. A two-wheeled vehicle characterized by The pull wire oil pressure balance valve comprises the pull wire oil pressure balance valve according to any one of claims 1-9.

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