Hydraulic balancing structure, brake lever, brake caliper and cable-actuated hydraulic conversion pump

Abstract

The present invention relates to a hydraulic balancing structure, a brake lever, a brake caliper and a cable-actuated hydraulic conversion pump. The hydraulic balancing structure is used in combination with a pump mechanism, and the pump mechanism is provided with: at least one oil cylinder cavity, which is provided on the pump mechanism and is radially communicated with an oil outlet; at least one oil sump cavity, which is provided on the pump mechanism and is communicated with the oil cylinder cavity by means of a communication hole, wherein the oil sump cavity and the oil cylinder cavity are internally provided with brake fluid; and a hydraulic balancing member, which is movably provided in the oil sump cavity, so as to replenish the oil cylinder cavity with the brake fluid during a braking action, thereby balancing the brake hydraulic pressure. In the present invention, during braking, the brake fluid in the oil sump cavity automatically replenishes the oil cylinder cavity having a reduced pressure, so as to maintain sufficient fluid in a braking system for braking, thereby ensuring vehicle braking performance.

Description

Oil pressure balance structure, brake lever, brake caliper and wire pulling oil pressure conversion pump TECHNICAL FIELD

[0001] The present application relates to the technical field of bicycle accessories, in particular to an oil pressure balance structure, a brake lever, a brake caliper and a wire pulling oil pressure conversion pump. BACKGROUND

[0002] The wire pulling oil disc is a new type of disc brake that combines the wire pulling disc brake and the oil pressure disc brake on the market. It has the advantages of wire pulling disc brake and oil pressure disc brake, lower cost and better braking experience.

[0003] The key component of the wire pulling oil disc is the wire pulling oil pressure conversion pump, which is used to convert the pulling force of the wire brake lever into oil pressure to deliver to the oil pressure pump. The existing wire pulling oil pressure conversion pump also has the shortcomings of traditional oil pressure disc brake, that is, after a period of use, as the brake pad wears out, the piston in the brake pump needs more brake oil pressure to move forward to brake, and insufficient brake oil pressure will cause brake failure;

[0004] At this time, the oil hole closed by the oil seal bolt needs to be opened to supplement the brake oil in the oil cylinder cavity. The oil hole is generally provided on the oil pool cavity which is in communication with the oil cylinder cavity. The opening of the oil hole will cause air to enter the braking system. However, during the process of supplementing the liquid and discharging the air, the air in the braking system may not be completely discharged due to the limitation of the oil path. The remaining air will not improve the brake failure of the braking system after supplementing the liquid, and even the risk is greater.

[0005] Therefore, we propose an oil pressure balance structure, a brake lever, a brake caliper and a wire pulling oil pressure conversion pump. SUMMARY

[0006] The present application provides an oil pressure balance structure, a brake lever, a brake caliper and a wire pulling oil pressure conversion pump to at least solve the problem in the prior art that the air in the braking system may not be completely discharged during the process of supplementing the liquid and discharging the air due to the limitation of the oil path. The remaining air will not improve the brake failure of the braking system after supplementing the liquid, and even the risk is greater.

[0007] In a first aspect, the present application provides an oil pressure balance structure which is used with a pump mechanism, characterized in that the pump mechanism is provided with:

[0008] An oil cylinder cavity, the number of which is at least one, is provided on the pump mechanism and is in radial communication with an oil outlet;

[0009] An oil pool cavity, the number of which is at least one, is provided on the pump mechanism and is in communication with the oil cylinder cavity through a communication hole, and the oil pool cavity and the oil cylinder cavity have brake oil therein;

[0010] An oil pressure balancing member movably arranged in the oil pool cavity to supplement brake oil into the oil cylinder cavity to balance brake oil pressure when braking.

[0011] Optionally, the oil pressure balancing member comprises:

[0012] a piston body movably arranged in the oil pool cavity and having an annular outer wall movably sealed with the inner wall of the oil pool cavity, which moves towards the communication hole to supplement brake oil into the oil cylinder cavity to balance brake oil pressure when braking;

[0013] an oil pool cavity cover fixedly arranged at the open end of the oil pool cavity, and the oil pool cavity cover is provided with a balancing hole communicating with external atmospheric pressure.

[0014] Optionally, the oil pressure balancing member further comprises:

[0015] a liquid supplementing channel axially and throughly formed in the axial middle part of the piston body;

[0016] an oil seal plug having an outer threaded segment threadedly assembled with an inner threaded surface formed on the inner wall of the liquid supplementing channel to seal the liquid supplementing channel.

[0017] Optionally, an oil seal cone surface is arranged in the inner cavity of the liquid supplementing channel, and the plug tail of the oil seal plug is formed with a tapered plug tail matched with the oil seal cone surface to seal the liquid supplementing channel.

[0018] Optionally, an oil injection edge hole is formed in the axial middle part of the oil seal plug, and the first end of the oil injection edge hole penetrates to the plug head of the oil seal plug, and the second end of the oil injection edge hole penetrates to the annular side wall of the oil seal plug close to the tapered plug tail.

[0019] Optionally, a sealing ring is sleeved on the annular outer wall of the piston body, and the annular outer wall of the sealing ring is in abutting sealing with the inner wall of the oil pool cavity.

[0020] Optionally, the diameter of the balancing hole is at least greater than the diameter of the plug head of the oil seal plug.

[0021] In a second aspect, the application provides a brake handle assembled at the handle of a vehicle frame, which is internally provided with a pump mechanism and has the oil pressure balancing structure of the first aspect.

[0022] In a third aspect, the application provides a brake caliper assembled at the front / rear wheel of a vehicle frame, which is internally provided with a pump mechanism and has the oil pressure balancing structure of the first aspect.

[0023] In a fourth aspect, the application provides a wire-pulling oil pressure conversion pump assembled on a vehicle frame and connected to an upper brake pump through a pulling wire / oil pipe and to a lower brake pump through an oil pipe, which is internally provided with a pump mechanism and has the oil pressure balancing structure of the first aspect.

[0024] Compared with the related art, the oil pressure balancing structure, the brake handle, the brake caliper and the line-to-oil pressure conversion pump provided by the present application at least have the following technical effects:

[0025] Through the active assembly of the piston body in the oil pool cavity and the stroke limiting by the oil pool cavity cover, as the brake pad wears, the brake oil in the oil pool cavity automatically supplements the oil cylinder cavity with reduced pressure during braking, and the piston body moves to the brake oil output direction, thereby maintaining sufficient oil amount in the brake system for braking.

[0026] Details of one or more embodiments of the present application are given in the following drawings and description, so that other features, objects and advantages of the present application are more apparent. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0028] Fig. 1 is a perspective view of an oil pressure balancing structure according to an exemplary embodiment.

[0029] Fig. 2 is a sectional view of a pump mechanism according to an exemplary embodiment.

[0030] Fig. 3 is an enlarged schematic view of structure A in Fig. 2.

[0031] Fig. 4 is a perspective view of an oil pressure balancing piece according to an exemplary embodiment.

[0032] Fig. 5 is a perspective view of an oil pressure balancing structure according to a second exemplary embodiment.

[0033] Fig. 6 is a perspective view of a pump mechanism according to a second exemplary embodiment.

[0034] Fig. 7 is a perspective view of an oil pressure balancing piece according to a second exemplary embodiment.

[0035] Fig. 8 is a perspective view of a pump mechanism according to a third exemplary embodiment.

[0036] Fig. 9 is an exploded view of an oil pressure balancing piece according to a third exemplary embodiment.

[0037] Fig. 10 is an exploded view of a pump mechanism according to a second exemplary embodiment.

[0038] Explanation of reference signs:

[0039] Pump mechanism 10; oil cylinder cavity 101; oil pool cavity 102; communication hole 103; oil outlet 104;

[0040] Hydraulic balance 20; piston body 201; oil pool cavity cover 202; balance hole 203; split pin 204; cover plate bolt 2041; liquid supplement channel 205; oil seal bolt 206; conical bolt tail 2061; oil injection edge hole 207; sealing ring 208;

[0041] Wire pulling oil driver 30; piston pull rod 301; piston ring 302; end head cover plate 303; second assembly hole 3031; wire buckle terminal 304; elastic member 305; plug base 306; sealing screw 307; wire sleeve 308; sealing ring 309;

[0042] Hydraulic piston 40; hand brake handle 50. DETAILED DESCRIPTION

[0043] The technical solutions of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0044] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] In the related art, the key component of the wire-pulling oil disc is a wire-pulling oil pressure conversion pump, which is used to convert the wire-pulling force of the wire-pulling brake handle into oil pressure to deliver to the oil pressure lower pump. The existing wire-pulling oil pressure conversion pump also has the shortcomings of traditional oil pressure disc brakes, that is, after being used for a period of time, as the brake pads wear out, the piston in the brake lower pump needs more brake oil pressure to move forward to brake, and insufficient brake oil pressure will cause brake failure;

[0047] At this time, the oil hole closed by the oil seal bolt needs to be opened to supplement brake oil into the oil cylinder cavity. The oil hole is generally provided on the oil pool cavity in communication with the oil cylinder cavity. The opening of the oil hole will cause air to enter the brake system. However, in the process of supplementing the liquid and discharging the air, the air in the brake system may not be completely discharged due to the limitation of the oil path. The remaining air will not improve the brake failure of the brake system after supplementing the liquid, and even the risk is greater.

[0048] Based on the above situation, the oil pressure balancing structure, brake handle, brake caliper and wire-pulling oil pressure conversion pump provided by the embodiments of the present application are described in detail below in combination with specific embodiments and drawings. Embodiment 1

[0049] The oil pressure balancing structure provided by the embodiments of the present application is used in combination with a pump mechanism 10. The pump mechanism 10 is provided with:

[0050] The oil cylinder cavity 101 is provided on the pump mechanism 10 and is radially communicated with the oil outlet 104. In this embodiment, referring to FIGS. 1-2, the number of oil cylinder cavities 101 is two and they are arranged in parallel;

[0051] The oil pool cavity 102 is provided on the pump mechanism 10 and is communicated with the oil cylinder cavity 101 through the communication hole 103. The oil pool cavity 102 and the oil cylinder cavity 101 have brake oil liquid that can meet the braking demand;

[0052] The oil pressure balancing piece 20 is movably arranged in the oil pool cavity 102 to supplement brake oil liquid into the oil cylinder cavity 101 during braking to balance the brake oil pressure;

[0053] FIG. 3 is an enlarged schematic view of structure A in FIG. 2. FIG. 4 is a perspective view of the oil pressure balancing piece according to an example embodiment. Referring to FIGS. 1-4, in this embodiment, the oil pressure balancing piece 20 includes:

[0054] The piston body 201 is movably assembled in the oil pool cavity 102, and the annular outer wall thereof is movably sealed with the inner wall of the oil pool cavity 102. During braking, the piston body 201 moves to the direction of the communication hole 103 to make brake oil liquid supplement into the oil cylinder cavity 101 to balance the brake oil pressure.

[0055] An oil pool cavity cover 202 is fixedly assembled to the open end of the oil pool cavity 102 by means of the split pin 204, and the oil pool cavity cover 202 is provided with a balance hole 203 for communicating with the external atmospheric pressure. Further, referring to FIG. 3, in the embodiment, the open end of the oil pool cavity 102 is provided with a slot for assembling the oil pool cavity cover 202 and the split pin 204 to adapt to the fixed oil pool cavity cover 202.

[0056] In an optional embodiment, continuing to refer to FIGS. 3-4, the annular outer wall of the piston body 201 is sleeved with a sealing ring 208, and the annular outer wall of the sealing ring 208 abuts and seals against the inner wall of the oil pool cavity 102.

[0057] In the technical solution of the above embodiment, referring to FIGS. 1-2 and 4, in the initial state, the piston body 201 is located in the oil pool cavity 102 close to the open end of the oil pool cavity 102 and is limited in stroke by the oil pool cavity cover 202. As the brake pad wears, the brake oil in the oil pool cavity 102 automatically supplements the oil cylinder cavity 101 with reduced pressure during braking. The piston body 201 moves in the direction of brake oil output under the external atmospheric pressure, thereby maintaining sufficient oil quantity in the brake system for braking.

[0058] Further, in long-term use, as the brake pad wears, the brake oil in the oil pool cavity 102 can automatically supplement the oil cylinder cavity 101 with reduced pressure, so that an expansion allowance is gradually formed between the piston body 201 and the oil pool cavity cover 202. During braking, the brake oil is heated and expanded by conducting the heat of the brake pad. The brake oil expanded in volume can enter the oil pool cavity 102 from the oil cylinder cavity 101 through the communication hole 103 to achieve pressure balance, thereby avoiding the risk of disc lock and maintaining and optimizing the stable braking effect of the oil pressure disc brake. At this time, the brake oil entering the oil pool cavity 102 pushes the piston body 201 to move in the oil pool cavity 102 to the side of the oil pool cavity cover 202 to accommodate the expansion volume required by the brake oil. When the temperature of the brake oil decreases, its volume decreases, and it automatically flows back to the oil cylinder cavity 101 with reduced pressure. Under the action of the external atmospheric pressure, the piston body 301 gradually returns to the original position as the brake oil flows back.

[0059] Further, during vehicle installation, a certain expansion allowance can be directly provided between the piston body 201 and the oil pool cavity cover 202 to adapt to the expansion volume of the brake oil heated.

[0060] In summary, the oil pressure balancing structure provided by the embodiment 1 of the present application is assembled by the movement of the piston body 201 in the oil pool cavity 102 and is limited in stroke by the oil pool cavity cover 202. With the wear of the brake pad, the brake oil in the oil pool cavity 102 is automatically supplemented into the oil cylinder cavity 101 with reduced pressure during the braking process, and the piston body 201 moves to the brake oil output direction, so as to maintain the sufficient oil amount in the brake system for braking. Embodiment 2

[0061] The difference between the embodiment 2 and the embodiment 1 of the present application is that Fig. 5 is a perspective view of the oil pressure balancing structure according to the second exemplary embodiment, Fig. 6 is a perspective view of the pump mechanism according to the second exemplary embodiment, and Fig. 7 is a perspective view of the oil pressure balancing piece according to the second exemplary embodiment. Referring to Figs. 5-7, in the embodiment 2, the oil pressure balancing piece 20 further comprises:

[0062] a liquid supplementing channel 205 axially and centrally provided in the piston body 201;

[0063] an oil seal plug 206 having an outer threaded section in the middle, which is threadedly assembled with an inner threaded surface formed on the inner wall of the liquid supplementing channel 205 to block the liquid supplementing channel 205. It can be understood that the diameter of the balancing hole 203 is at least greater than the diameter of the plug head of the oil seal plug 206; preferably, the inner diameter of the balancing hole 203 covers to the oil injection edge hole 207, so that the output port of the oil injection tool can enter to perform the brake oil supplementing operation; the inner cavity of the liquid supplementing channel 205 is provided with an oil seal conical surface, and the plug tail of the oil seal plug 206 is formed with a conical plug tail 2061 which cooperates with the oil seal conical surface to seal the liquid supplementing channel 205.

[0064] In an optional embodiment, continuing to refer to Fig. 7, the axial middle of the oil seal plug 206 is provided with an oil injection edge hole 207, and the first end of the oil injection edge hole 207 penetrates to the plug head of the oil seal plug 206, and the second end penetrates to the annular side wall of the oil seal plug 206 close to the conical plug tail 2061; the diameter of the balancing hole 203 is at least greater than the diameter of the plug head of the oil seal plug 206.

[0065] The other structures not described refer to the embodiment 1.

[0066] When the brake oil needs to be supplemented in the pump mechanism 10, the output port of the oil injection tool is inserted into the oil injection edge hole 207, and a small amount of brake oil is pre-injected to discharge the residual air in the oil injection edge hole 207 and the liquid supplement channel 205, and then the tool is used to twist the plug head of the oil seal plug 206, and the plug head is slightly loosened in the threaded direction by a certain stroke, at this time, the annular liquid inlet channel is formed between the conical plug tail 2061 and the oil seal conical surface, the liquid inlet channel is connected with the second end of the oil injection edge hole 207, at this time, the brake oil can directly enter the oil pool cavity 102, and air cannot enter the brake system, the brake oil is quickly supplemented, and the brake performance of the vehicle is ensured.

[0067] At the same time, it can be understood that the sealing ring 208 sleeved on the oil seal plug 206 is still in an interference fit state with the inner wall surface of the oil injection edge hole 207, so that brake oil leakage is avoided in the liquid supplement state.

[0068] In summary, the oil pressure balancing structure provided in the embodiment 2 is assembled in the oil pool cavity 102 through the piston body 201, and the stroke is limited through the oil pool cavity cover 202, with the wear of the brake pad, the brake oil in the oil pool cavity 102 is automatically supplemented to the oil cylinder cavity 101 with reduced pressure during braking, the piston body 201 moves to the brake oil output direction, so that the oil amount in the brake system is sufficient for braking; when the liquid needs to be supplemented in the pump mechanism 10, the oil injection tool is inserted into the oil injection edge hole 207, the oil seal plug 206 is loosened in the reverse threaded direction, the liquid inlet channel is formed between the conical plug tail 2061 and the oil seal conical surface, and the liquid inlet channel is connected with the second end of the oil injection edge hole 207, at this time, the brake oil can directly enter the oil pool cavity 102, the brake oil is quickly supplemented, air cannot enter the brake system, and the brake performance of the vehicle is ensured. Embodiment 3

[0069] The embodiment 3 provides a brake handle, which is assembled at a handlebar of a vehicle frame, and FIG. 8 is a three-dimensional view of a pump mechanism according to a third exemplary embodiment. FIG. 9 is an exploded view of an oil pressure balancing piece according to the third exemplary embodiment. Referring to FIG. 1 or FIGS. 8-9, the pump mechanism 10 is arranged therein and has the oil pressure balancing structure of the embodiment 1 or the embodiment 2, the oil cylinder cavity 101 of the pump mechanism 10 is assembled with the oil pressure piston 40, and the oil pressure piston 40 is movably connected with the hand brake handle 50 through the piston rod, so that the oil pressure piston 40 is driven to move in the oil cylinder cavity 101 when the hand brake handle 50 is pinched, and the oil liquid is driven to reach the brake caliper to brake. Embodiment 4

[0070] The embodiment 4 provides a brake caliper (not shown in the figure), which is assembled at a front wheel or a rear wheel of a vehicle frame, and the pump mechanism 10 is arranged therein and has the oil pressure balancing structure of the embodiment 1 or the embodiment 2. Embodiment 5

[0071] The embodiment 5 of the present application provides a wire-pulling oil pressure conversion pump, which is assembled on a vehicle frame and connected with an upper brake pump through a wire / oil pipe and connected with a lower brake pump through an oil pipe. Referring to FIGS. 5-7, the wire-pulling oil pressure conversion pump is provided with a pump mechanism 10 and has the oil pressure balance structure of the embodiment 1 or the embodiment 2.

[0072] Different from the embodiment 1 or the embodiment 2, the oil pool cavity cover 202 is fixed on the pump mechanism 10 through the cover plate bolt 2041 to achieve fixed assembly.

[0073] In the embodiment, the wire-pulling oil pressure conversion pump is provided with the wire-pulling oil driving part 30 movably arranged in the oil cylinder cavity 101. The wire-pulling oil driving part 30 is used to drive the brake oil in the oil cylinder cavity 101 to be output from the oil outlet 104 during brake operation.

[0074] FIG. 10 is an exploded view of the pump mechanism according to the second exemplary embodiment. Referring to FIG. 10, in the embodiment, the number of the oil cylinder cavities 101 is two, and the number of the wire-pulling oil driving parts 30 is also two and arranged in the two oil cylinder cavities 101 respectively. The wire-pulling oil driving part 30 comprises:

[0075] The piston pull rod 301 is movably assembled in the oil cylinder cavity 101, and a hollow hole for passing the wire is axially formed in the middle part of the piston pull rod 301;

[0076] The sealing ring 309 is movably sleeved on the first end of the piston pull rod 301 and limitingly assembled on the stepped part formed on the inner wall of the oil cylinder cavity 101;

[0077] The piston ring 302 is radially sleeved on the stepped part formed in the middle part of the piston pull rod 301, and the outer wall surface of the piston ring 302 abuts against the inner wall of the oil cylinder cavity 101. The brake oil cavity is formed between the piston ring 302 and the sealing ring 309, and the brake oil cavity is communicated with the communication hole 103 and the oil outlet 104;

[0078] The plug base 306 is threadedly assembled at the first opening end of the oil cylinder cavity 101 and tightly fixes the axial position of the sealing ring 309. The first movable cavity is formed in the middle part of the plug base 306;

[0079] The elastic member 305 is limitingly assembled in the hollow hole at one end and extends into the first movable cavity at the second end to provide elastic return force after the piston pull rod 301 moves;

[0080] The end head cover plate 303 covers the second opening end of the oil cylinder cavity 101 to limit the starting point of the stroke of the piston pull rod 301, and the second assembly hole 3031 is formed in the end head cover plate 303. Further, referring to FIG. 10, the end head cover plate 303 and the oil pool cavity cover 202 are integrally formed, which saves parts and reduces assembly procedures.

[0081] wire buckle terminal 304, the first end of which is screwed through the second assembly hole 3031 and is screwed with the second end of the piston rod, and a wire locking screw is arranged on the wire buckle terminal 304 to fix the pull wire.

[0082] With continuous reference to FIG. 10, the wire pulling oil driving piece 30 further comprises:

[0083] a wire threading sleeve 308 which is inserted into the plug base 306 to thread the pull wire;

[0084] a sealing screw 307 which is screwed with the end of the plug base 306 away from the sealing ring 309 to fix the wire threading sleeve 308 and close the first open end of the oil cylinder cavity 101.

[0085] With continuous reference to FIGS. 5-6, in the embodiment, the number of the oil pool cavities 102 is two, the two oil pool cavities 102 are arranged on the same horizontal axis and the open ends thereof are symmetrically distributed, and a single oil pool cavity 102 is connected with a single oil cylinder cavity 101 through the communication hole 103.

[0086] It can be understood that a single oil pool cavity 102 can also be arranged, and the single oil pool cavity 102 is connected with two oil cylinder cavities 101 through the communication hole 103.

[0087] In the technical solution of the above embodiment, the single wire pulling oil driving piece 30 is matched with a brake handle and an oil pressure down pump during loading, specifically, the first end of the pull wire is connected with the brake handle, the second end of the pull wire is threaded through the hollow hole of the wire pulling oil driving piece 30 and is fixed with the wire buckle terminal 304 through the wire locking screw; the first end of the oil pipe is connected with the oil outlet 104 through the oil pipe joint, and the second end is connected with the oil pressure down pump which is assembled at the front / rear wheel of the bicycle frame;

[0088] When the brake handle is pinched, the piston rod 301 is axially advanced in the oil cylinder cavity 101 and drives the brake oil in the brake oil cavity to be output through the oil outlet 104 by the piston ring 302, and then the brake oil enters the oil pressure down pump at the front / rear wheel through the oil pipe, the oil pressure down pump clamps the disc of the front / rear wheel to perform oil pressure braking, the oil circuit is smooth, and the braking is stable.

[0089] Other structures not described refer to the embodiment 1 or the embodiment 2.

[0090] In summary, the oil pressure balance structure, the brake handle, the brake caliper and the line-pulling oil pressure conversion pump provided by the embodiment of the present application are characterized in that the piston body 201 is movably assembled in the oil pool cavity 102 and is limited in stroke by the oil pool cavity cover 202, and as the brake pad wears, the brake oil in the oil pool cavity 102 automatically supplements the oil cylinder cavity 101 with reduced pressure during braking, the piston body 201 moves to the brake oil output direction, so that the oil amount in the brake system is maintained sufficient for braking; when the pump mechanism 10 needs to supplement the liquid, the oil injection tool is inserted into the oil injection edge hole 207, the oil seal bolt 206 is loosened by being screwed in the reverse direction, the tapered bolt tail 2061 and the oil seal tapered surface form a liquid inlet channel, the liquid inlet channel is connected with the second end of the oil injection edge hole 207, at this time, the injected brake oil can directly enter the oil pool cavity 102, and the air cannot enter the braking system, the rapid brake oil supplement is realized, and the vehicle braking performance is ensured.

[0091] The technical features of the above embodiments can be combined in any manner, and to make the description concise, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0092] The above embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as the limitation of the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. An oil pressure balance structure used in conjunction with a pump mechanism, characterized by, The pump mechanism is provided with: at least one oil cylinder cavity, which is provided on the pump mechanism and has a radial oil outlet; at least one oil pool cavity, which is provided on the pump mechanism and is connected to the oil cylinder cavity through a communication hole, and the oil pool cavity and the oil cylinder cavity have brake oil; an oil pressure balancing member movably arranged in the oil pool cavity to supplement brake oil into the oil cylinder cavity and balance brake oil pressure during braking.

2. The oil pressure balance structure according to claim 1, characterized by: The oil pressure balancing member comprises: a piston body movably arranged in the oil pool cavity, and an annular outer wall of the piston body is movably sealed with an inner wall of the oil pool cavity, which moves towards the communication hole to supplement brake oil into the oil cylinder cavity and balance brake oil pressure during braking; an oil pool cavity cover fixedly arranged at an open end of the oil pool cavity, and the oil pool cavity cover is provided with a balance hole for communicating with external atmospheric pressure.

3. The oil pressure balance structure according to claim 2, characterized by: The oil pressure balancing member further comprises: a liquid supplement channel axially provided in an axial middle part of the piston body; an oil seal plug having an outer threaded segment, which is threadedly assembled with an inner threaded surface formed on an inner wall of the liquid supplement channel to block the liquid supplement channel.

4. The oil pressure balance structure according to claim 3, characterized by: The liquid supplement channel is provided with an oil seal taper surface, and a plug tail of the oil seal plug is formed with a tapered plug tail matched with the oil seal taper surface to seal the liquid supplement channel.

5. The oil pressure balance structure according to claim 4, characterized by: An oil injection edge hole is provided in an axial middle part of the oil seal plug, and a first end of the oil injection edge hole penetrates to a plug head of the oil seal plug, and a second end of the oil injection edge hole penetrates to an annular side wall of the oil seal plug close to the tapered plug tail.

6. The oil pressure balance structure according to claim 2, characterized by: An annular outer wall of the oil seal plug is provided with a sealing ring, and an annular outer wall of the sealing ring is abutted and sealed with an inner wall of the oil pool cavity.

7. The oil pressure balance structure according to claim 5, characterized by: The balance hole has a diameter larger than that of the plug head of the oil seal plug.

8. A brake lever which is fitted to a handle of a vehicle frame, characterized by comprising: The oil pressure balancing structure of any one of claims 1-7 is arranged in the pump mechanism.

9. A brake caliper which is assembled at a front / rear wheel of a vehicle frame, characterized by, The oil pressure balancing structure of any one of claims 1-7 is arranged in the pump mechanism.

10. A wire-pull hydraulic pressure conversion pump which is mounted on a vehicle frame and connected to an upper brake pump through a wire / tube and connected to a lower brake pump through a tube, characterized in that, The oil pressure balancing structure of any one of claims 1-7 is arranged in the pump mechanism.

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