Oil pressure brake

Abstract

The utility model discloses an oil pressure brake which comprises a body internally provided with a pump body assembly, and the pump body assembly is provided with a main cylinder body and a piston rod; the first pivotal shaft is pivotally connected with the extending end, extending out of the main cylinder body, of the piston rod, and the first pivotal shaft is arranged in a sliding groove formed in the body in a penetrating mode; a brake lever; the shifting support is located in the brake rod, one end of the shifting support extends into the body and abuts against the side face, facing the main cylinder body, of the first pivot shaft, and a first adjusting cavity is formed in the shifting support; the shifting support and the brake rod are connected to the body in a pivoted mode through a second pivot shaft, and the other end of the shifting support abuts against the inner side wall of the brake rod. The first adjusting piece is arranged in the first adjusting cavity in a penetrating mode, the free end, extending out of the first adjusting cavity, of the first adjusting piece abuts against the side face, close to the shifting support, of the body under the action of external force, one end of the shifting support applies force to the first pivot shaft, and the first pivot shaft moves along the sliding groove. According to the utility model, the idle stroke can be flexibly adjusted.

Description

TECHNICAL FIELD

[0001] The utility model relates to a bicycle brake technical field, especially a kind of oil pressure brake. BACKGROUND

[0002] Brake system on bicycle is the key to operate bicycle speed, maintain safety, the brake of the traffic tools such as bicycle on the market is mostly hydraulic brake using oil and other liquid medium as transmission medium, and the most representative is oil pressure brake.

[0003] The principle of oil pressure brake is that one brake oil pipe one end is combined with the output end of the internal oil circuit of one brake handle seat, and the other end of brake oil pipe is combined with one disc brake, and the pressing of handle can drive the piston rod in internal oil circuit to move, so that the pressure in oil circuit is delivered to brake clamp through brake oil pipe, and then the brake clamp is pushed to clamp the disc on the wheel, so as to achieve the purpose of braking.

[0004] In the process of pressing oil pressure brake to play the role of brake, the handle acts to push the piston rod in oil circuit after a stroke, and the brake clamp is acted on by brake oil to complete brake operation, and when the handle is still in this stroke, brake oil does not act on brake clamp, so it is called idle stroke.

[0005] The length of idle stroke of an oil pressure brake determines its operation sensitivity, and different users and different use environments have different requirements for the sensitivity of oil pressure brake, therefore, an oil pressure brake with adjustable idle stroke is needed to improve user experience. UTILITY MODEL CONTENT

[0006] To solve the above technical problems, the utility model provides an oil pressure brake, which can adjust the initial position of piston rod relative to main cylinder body by first adjusting part to realize the purpose of adjusting idle stroke, and the position of first adjusting part is hidden and not easy to touch and change.

[0007] To achieve the above utility model purposes, the utility model adopts the following technical solutions:

[0008] The application relates to an oil pressure brake suitable for being assembled on a handlebar, and the oil pressure brake comprises:

[0009] A body is provided with a pump body assembly, and the pump body assembly has a main cylinder body fixed in the body and a piston rod movably arranged in the main cylinder body;

[0010] A first pivot shaft is pivotally connected to the extension end of the piston rod extending out of the main cylinder body, and the first pivot shaft is arranged in the sliding groove formed in the body.

[0011] brake lever;

[0012] a toggle bracket, which is located in the brake lever, one end of the toggle bracket extends into the body and abuts against the side of the first pivot shaft towards the master cylinder, a first adjusting cavity is formed on the toggle bracket, the toggle bracket and the brake lever are pivotally connected to the body through a second pivot shaft respectively, the other end of the toggle bracket abuts against the inner side wall of the brake lever;

[0013] a first adjusting member, which is arranged in the first adjusting cavity, the free end of the first adjusting member extending out of the first adjusting cavity abuts against the side of the body close to the toggle bracket under the action of an external force, so that one end of the toggle bracket applies force to the first pivot shaft, the first pivot shaft moves along the sliding groove to adjust the initial position of the piston rod relative to the master cylinder, and the first adjusting member can maintain the initial position after adjustment.

[0014] In some embodiments of the present application, the first adjusting member has a first end, a rod portion and a second end, the rod portion connects the first end and the second end and has an external thread formed thereon, an inner thread is formed on the inner side wall of the first adjusting cavity to cooperate with the external thread, and the hydraulic brake further comprises:

[0015] a limiting member, which is arranged on the second end when the second end extends out of the first adjusting cavity and cooperates with the toggle bracket to limit the position;

[0016] a resistance washer, which is arranged at the entrance of the first adjusting member extending into the first adjusting cavity and is sleeved on the rod portion.

[0017] In some embodiments of the present application, the first end is a bolt head suitable for tool operation;

[0018] When an external force is applied to the first end by operating a tool, the free end of the second end abuts against the side of the body close to the toggle bracket.

[0019] In some embodiments of the present application, the body is recessed to form a secondary oil reservoir, and the hydraulic brake further comprises:

[0020] a secondary cylinder cover, which is fixed to the body and used to close the secondary oil reservoir, the secondary oil reservoir has an oil pressure inlet, and the master cylinder has an oil pressure inlet, the oil pressure inlets are in communication with the oil pressure outlet.

[0021] In some embodiments of the present application, the oil pressure inlet is formed on the inner side wall of the master cylinder, and the pump body assembly further comprises:

[0022] At least one sealing ring is respectively arranged in the main cylinder and sleeved on the piston rod, wherein one sealing ring forms a first sealing contact surface with the inner wall of the main cylinder, the distance between the normal plane of the first sealing contact surface and the oil inlet is defined as the idle stroke, and the length of the idle stroke is adjusted when one end of the lever applies force to the first pivot shaft.

[0023] In some embodiments of the present application, the oil brake further comprises:

[0024] A first pivot sleeve is sleeved on the first part of the first pivot shaft on one side of the pivot position of the piston rod and the first pivot shaft;

[0025] A second pivot sleeve is sleeved on the second part of the first pivot shaft on the other side of the pivot position of the piston rod and the first pivot shaft;

[0026] One end of the lever is abutted to the side of the first pivot sleeve and / or the second pivot sleeve towards the main cylinder.

[0027] In some embodiments of the present application, one end of the lever has a first leg and a second leg side by side, the first leg is abutted to the first part of the first pivot shaft on one side of the pivot position of the piston rod and the first pivot shaft, and the second leg is abutted to the second part of the first pivot shaft on the other side of the pivot position of the piston rod and the first pivot shaft.

[0028] In some embodiments of the present application, the other end of the lever is provided with a second adjusting cavity, and the oil brake further comprises:

[0029] A second adjusting member is arranged in the second adjusting cavity, and the part of the second adjusting member protruding out of the second adjusting cavity is abutted to the inner wall of the brake rod.

[0030] In some embodiments of the present application, the inner wall of the brake rod is provided with a limiting slot corresponding to the end of the second adjusting member protruding out of the second adjusting cavity;

[0031] A reinforcing block is arranged in the limiting slot, and the end of the second adjusting member protruding out of the second adjusting cavity is abutted to the reinforcing block.

[0032] In some embodiments of the present application, the oil brake further comprises:

[0033] A housing is arranged to form a containing space, and the body is arranged in the containing space;

[0034] A bushing is arranged to close the part exposed outside the connection between the brake rod and the body which is not closed by the housing.

[0035] Compared with the prior art, the oil brake of the embodiment of the present application has the following advantages and beneficial effects:

[0036] (1) By opening a first adjusting cavity on the shifting support, movably arranging a first adjusting member in the first adjusting cavity, and adjusting the first adjusting member, the end of the first adjusting member extending out of the first adjusting cavity abuts against one side surface of the body while the length of the first adjusting member extending out of the first adjusting cavity becomes longer and longer, so that the shifting support moves to apply force to the first pivot shaft, the first pivot shaft moves along the sliding groove to drive the piston rod to move in the main cylinder body, the initial position of the piston rod is changed, and the adjustment of the idle stroke is realized.

[0037] (2) The first adjusting member is arranged in the first adjusting cavity and is hidden by the brake lever, so it is not convenient to adjust at will, and the reliability of the initial position of the piston rod is ensured.

[0038] Other features and advantages of the present application will become more apparent after reading the specific embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0040] Figure 1 is a perspective view of an oil brake embodiment of the present application;

[0041] Figure 2 is a partial exploded view of an oil brake embodiment of the present application;

[0042] Figure 3 is a connection diagram of a pump body assembly, a shifting assembly and a brake lever in an oil brake embodiment of the present application;

[0043] Figure 4 is a connection diagram of a pump body assembly and a shifting assembly in an oil brake embodiment of the present application;

[0044] Figure 5 is a partial cross-sectional view of the connection of a shifting assembly and a brake lever in an oil brake embodiment of the present application;

[0045] Figure 6 is a cross-sectional view of an oil brake embodiment of the present application, wherein the brake lever, the shell and the bushing are not shown;

[0046] Figure 7 is Figure 6Enlarged view of part A;

[0047] Figure 8 is Figure 6 Enlarged view of part B;

[0048] Figure 9 is the structure diagram of the toggle support in the oil brake embodiment of the utility model;

[0049] Figure 10 is the connection diagram of the toggle support, the first adjusting member and the second adjusting member in the oil brake embodiment of the utility model, and the corresponding idle stroke is the maximum value;

[0050] Figure 11 is the connection diagram of the toggle support, the first adjusting member and the second adjusting member in the oil brake embodiment of the utility model, and the corresponding idle stroke is the adjusted value;

[0051] Reference signs:

[0052] 110, brake lever; 120, body; 121 / 121', sliding groove; 130, toggle support; 131, first adjusting cavity; 132, second adjusting cavity; 133, first supporting leg; 134, second supporting leg; 140, pump body assembly; 141, main cylinder body; 142, piston rod; 143, oil pressure inlet; 144, first sealing ring; 140', auxiliary oil reservoir; 141', auxiliary cylinder cover; 0, shell; 160, bushing; 170, first pivot shaft; 171, first pivot sleeve; 172, second pivot sleeve; 180, second pivot shaft; 190, first adjusting member; 191, first end portion; 192, rod portion; 193, second end portion; 194, limiting member; 195, resistance washer; 190', second adjusting member; 191', threaded rod portion; 192', abutting portion; 193', operating portion; 200, reinforcing block; 300, connecting ring. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0054] Based on the embodiments of the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the range of the utility model protection. In the description of the utility model, it is to be understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model.

[0055] In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting" and "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected. For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. In the description of the above embodiments, the specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0056] The terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise stated, the meaning of "multiple" is two or more.

[0057] In the oil brake system of the bicycle, the length of the air stroke of the piston rod 142 determines the brake sensitivity. Considering the different requirements of different operators or different use environments for brake sensitivity, referring to Figure 1 The application provides an oil brake which can flexibly adjust the air stroke.

[0058] Referring to Figure 1 The oil brake is adapted to be assembled on a handlebar (not shown) through the connecting ring 300. The oil brake related to the embodiment is, for example, an oil brake on the right handlebar of the bicycle.

[0059] In some embodiments of the application, referring to Figure 1 The oil brake comprises a shell 150, a bushing 160 and a brake lever 110. The shell 150 surrounds a containing space. The brake lever 110 is made of carbon fiber material. The bushing 160 is made of plastic material. The shell 150, the bushing 160 and the brake lever 110 jointly form the appearance of the oil brake.

[0060] In some embodiments of the present application, referring to Figures 2 to 4 、 Figure 6 , the oil brake further comprises a body 120, a pump body assembly 140, a toggle bracket 130 and a first adjusting member 190, the body 120 is located in the housing 150 and internally provided with the pump body assembly 140.

[0061] Referring to Figures 3 to 6 , the pump body assembly 140 comprises a main cylinder body 141 and a piston rod 142, the main cylinder body 141 is fixedly arranged in the body 120, and the piston rod 142 is movably arranged in the main cylinder body 141. When an external force (the direction of action is shown by an arrow in Figure 1 ) is applied to the brake lever 110, the piston rod 142 moves through an idle stroke, compresses the oil pressure in the first part of the main cylinder body 141, and then the oil is delivered to the brake caliper (not shown) through the oil pipe (not shown) to achieve braking.

[0062] In some embodiments of the present application, referring to Figure 6 , a sub-oil reservoir 140' is recessed on the body 120, and the sub-oil reservoir 140' is used to supplement the oil in the first part of the main cylinder body 141. The sub-oil reservoir 140' is filled with oil through the opening of the sub-oil reservoir 140'.

[0063] To close the sub-oil reservoir 140', referring back to Figure 2 , the oil brake further comprises a sub-cylinder cover 141', which is fixed to the body 120 and closes the sub-oil reservoir 140', and the sub-oil reservoir 140' has an oil pressure outlet (not labeled), which is used to fill the oil in the first part of the main cylinder body 141 and ensure the oil pressure stable when the piston rod 142 is in the initial position.

[0064] It should be noted that the oil in the first part of the main cylinder body 141 is the oil used for braking.

[0065] In some embodiments of the present application, referring to Figure 3 and Figure 4 , an oil pressure inlet 143 is formed on the side wall of the main cylinder body 141, and the oil pressure outlet and the oil pressure inlet 143 are in communication (see Figure 8 ) when the piston rod 142 is in the initial position, the oil pressure inlet 143 and the oil pressure outlet are in communication, forming an oil filling path along the dotted line, and ensuring the oil pressure in the first part of the main cylinder body 141 stable.

[0066] When the brake external force is applied to the brake lever 110, the oil pressure outlet and the oil pressure inlet 143 are also kept in communication before the piston rod 142 moves through the idle stroke, at which time the oil pressure in the first part of the master cylinder body 141 is pressed back to the auxiliary oil reservoir 140', and then the piston rod 142 continues to move to the idle stroke, the oil pressure outlet and the oil pressure inlet 143 are not in communication, and then the piston rod 142 continues to move to make the oil in the first part of the master cylinder body 141 act on the brake clamp.

[0067] In some embodiments of the present application, in order to achieve that the oil pressure outlet and the oil pressure inlet 143 are not in communication after the idle stroke, referring to Figure 6 and Figure 8 , the pump body assembly 140 further comprises at least one sealing ring (not labeled) arranged in the master cylinder body 141 and sleeved on the piston rod 142.

[0068] When the piston rod 142 is in the initial position, referring to Figure 4 , the face between one of the sealing rings (labeled as the first sealing ring 144) and the inner side wall of the master cylinder body 141 is labeled as the first sealing contact face, and the distance between the vertical plane (referring to the plane shown by the dotted line in Figure 8 ) of the first contact face and the oil pressure inlet 143 is labeled as the idle stroke.

[0069] When the piston rod 142 moves from the initial position along Figure 6 , the first sealing ring 144 is driven to move so as to close the oil pressure inlet 143 from not closing the oil pressure inlet 143, at which time the oil pressure outlet and the oil pressure inlet 143 are not in communication.

[0070] In some embodiments of the present application, referring to Figures 3 to 7 , the piston rod 142 is pivotally connected with the first pivot shaft 170, and the pivot center line of the first pivot shaft 170 is perpendicular to the length direction of the piston rod 142, so that when the external force is applied to the first pivot shaft 170 and drives the first pivot shaft 170 to move (for example, when the external force shown by the dotted arrow direction in Figure 6 is present), the piston rod 142 is also indirectly driven to move (for example, along the dotted arrow direction in Figure 6 ), so as to deliver the oil in the first part of the master cylinder body 141 to the brake clamp through the vehicle oil pipe.

[0071] In order to facilitate the movement of the first pivot shaft 170, referring to Figure 2 and Figure 6 , the body 120 is oppositely provided with sliding grooves 121 / 121', and the two ends of the first pivot shaft 170 are respectively arranged in the opposite sliding grooves 121 / 121', wherein the opening direction of the sliding grooves 121 / 121' is consistent with the length direction of the piston rod 142.

[0072] In some embodiments of the present application, referring to Figure 2 and Figure 3 , the toggle bracket 130 is arranged in the brake lever 110 and one end (marked as the first end) extends into the body 120 and abuts against the side (marked as the first side) of the first pivot shaft 170 towards the master cylinder 141 (i.e., the first end of the toggle bracket 130 extends between the first pivot shaft 170 and the end of the piston rod 142 of the master cylinder 141 extending therefrom and abuts against the first side). The other end (marked as the second end) of the toggle bracket 130 abuts against the inner side wall of the brake lever 110 (see Figure 5 ).

[0073] In some embodiments of the present application, in order to realize the transmission of the brake external force to the toggle bracket 130 through the brake lever 110, the hydraulic brake further comprises an elastic return member (not marked), which is used to drive the brake lever 110 to return after the brake external force acts thereon, and the toggle bracket 130 and the brake lever 110 are respectively pivotally connected to the body 120 through the second pivot shaft 180 (see Figure 2 and Figure 3 ).

[0074] The elastic return member can be a torsion spring, which is sleeved on the second pivot shaft 180, one end of the torsion spring can abut against the toggle bracket 130, and the other end can abut against the inner side of the brake lever 110 (see Figure 6 , when the brake external force (in the direction shown by the solid arrow in Figure 6 ) acts on the brake lever 110, the brake lever 110 pivots around the second pivot shaft 180 and compresses the torsion spring (at this time, the torsion spring accumulates the elastic return force), the force is transmitted to the toggle bracket 130 through the torsion spring, the toggle bracket 130 counterclockwise pivots around the second pivot shaft 180 and then transmits the force to the first pivot shaft 170, so that the first pivot shaft 170 slides in the sliding groove 121 (in the direction shown by the dashed arrow in Figure 6 ) and the piston rod 142 moves in the master cylinder 141 (also in the direction shown by the dashed arrow in Figure 6 ).

[0075] Wherein, the component of the brake external force to the toggle bracket 130 in the length direction of the piston rod 142 is opposite to the component of the toggle bracket 130 to the first pivot shaft 170 in the length direction of the piston rod 142, so that the toggle bracket 130 can be counterclockwise rotated to pull the piston rod 142 when the brake external force acts.

[0076] After the brake external force disappears, the elastic return force returns the brake lever 110 to the initial position, and at the same time, the toggle bracket 130 and the piston rod 142 are also returned to the initial position driven by the torsion spring.

[0077] In some embodiments of the present application, referring toFigure 4 In order to avoid hard friction between the toggle bracket 130 and the first pivot shaft 170 when abutting, a first pivot sleeve 171 is sleeved on a first part of the first pivot shaft 170 located on one side of the pivot connection position between the piston rod 142 and the first pivot shaft 170, and a second pivot sleeve 172 is sleeved on a second part of the first pivot shaft 170 located on the other side of the pivot connection position between the piston rod 142 and the first pivot shaft 170.

[0078] The first end of the toggle bracket 130 abuts against one side of the first pivot sleeve 171 and / or the second pivot sleeve 172 towards the main cylinder body 141, and the first pivot sleeve 171 and the second pivot sleeve 172 can be designed as soft contact materials such as sponge sleeves and silica gel sleeves, so as to improve the contact friction between the toggle bracket 130 and the first pivot shaft 170 and at the same time not to easily damage the first pivot shaft 170.

[0079] In some embodiments of the present application, in order to stably transmit the force of the toggle bracket 130 to the first pivot shaft 170, referring to Figure 9 The first end of the toggle bracket 130 has a first leg 133 and a second leg 134 arranged side by side.

[0080] The first leg 133 extends between the first part of the first pivot shaft 170 and the main cylinder body 141 and abuts against one side of the first part towards the main cylinder body 141.

[0081] When the first pivot sleeve 171 is arranged on the first part of the first pivot shaft 170, the first leg 133 abuts against one side of the first pivot sleeve 171 towards the main cylinder body 141, referring to Figure 3 and Figure 4 .

[0082] The second leg 134 extends between the first part of the first pivot shaft 170 and the main cylinder body 141 and abuts against one side of the first part towards the main cylinder body 141.

[0083] When the second pivot sleeve 172 is arranged on the second part of the first pivot shaft 170, the second leg 134 abuts against one side of the second pivot sleeve 172 towards the main cylinder body 141.

[0084] In this way, when the force is transmitted to the first end of the toggle bracket 130, the first leg 133 and the second leg 134 are simultaneously stressed and balanced to the first pivot shaft 170, so as to ensure the stable movement of the piston rod 142 and realize the stability of braking.

[0085] In some embodiments of the present application, referring to Figure 5 , Figures 9 to 11In order to make the second end of the dialing support 130 abut against the inner side wall of the brake lever 110, the other end of the dialing support 130 is provided with a second adjusting cavity 132, and a second adjusting member 190' is arranged in the second adjusting cavity 132, and the part of the second adjusting member 190' extending out of the second adjusting cavity 132 abuts against the inner side wall of the dialing support 130.

[0086] The length of the second adjusting member 190' extending out of the second adjusting cavity 132 can be adjusted according to the distance between the second end of the dialing support 130 and the inner side wall of the brake lever 110.

[0087] Referring to Figure 5 , Figures 9 to 11 The second adjusting member 190' comprises an abutting portion 192', a threaded rod portion 191', and an operating portion 193'. The abutting portion 192' is in T shape with the threaded rod portion 191'. The operating portion 193' is formed in the end of the threaded rod portion 191' where the abutting portion 192' is not arranged. The operating portion 193' is a bolt head (for example, a hexagonal hole) suitable for tool operation, which facilitates the operation of the hexagonal hole by a standard hexagonal wrench, so that the abutting portion 192' extends out of the second adjusting cavity 132 more.

[0088] In some embodiments of the present application, the brake lever 110 is generally made of carbon fiber material, and the second adjusting member 190' is made of metal material. Therefore, in order to increase the contact area between the dialing support 130 and the inner side wall of the brake lever 110 and enhance the strength when the two are in contact, referring to Figure 5 a limiting groove (not labeled) is arranged at the position where the end of the second adjusting member 190' extending out of the second adjusting cavity 132 abuts against the inner side wall of the brake lever 110, and a reinforcing block 200 is arranged in the limiting groove, and the end of the second adjusting member 190' extending out of the second adjusting cavity 132 abuts against the reinforcing block 200.

[0089] The reinforcing block 200 can be made of stainless steel or metal material.

[0090] As described above, the implementation process of the oil brake when the brake external force acts on the brake lever 110 is described above. The adjustment of the initial position of the piston rod 142 (i.e., the adjustment of the idle stroke) will be described below. The adjustment of the initial position affects the length of the idle stroke.

[0091] In some embodiments of the present application, referring to Figure 6 and Figure 7 , Figure 10 and Figure 11 The first adjusting member 190 is arranged on the dialing support 130 to adjust the initial position of the piston rod 142.

[0092] In order to realize the adjustment of the first adjusting member 190 on the dialing support 130, referring toFigure 7 、 Figures 9 to 11 , the first adjusting member 190 is arranged in the first adjusting cavity 131, and when an external force is applied to the first adjusting member 190, the length of the part of the first adjusting member 190 extending out of the first adjusting cavity 131 changes.

[0093] Referring to Figure 10 , when the first adjusting member 190 is in the initial position, the end of the first adjusting member 190 extending out of the first adjusting cavity 131 does not abut against the body 120, at this time, the first pivot shaft 170 abuts against the sliding groove 121 / 121' near one end of the main cylinder body 141, and the piston rod 142 has a first initial position, which corresponds to a first idle stroke, and the first idle stroke at this time is the maximum value.

[0094] Referring to Figure 11 , when the part of the first adjusting member 190 extending out of the first adjusting cavity 131 gradually becomes longer under the action of the external force, and the end of the first adjusting member 190 abuts against the body 120 (see Figure 7 ), the end and the supporting surface of the body 120 abut against each other to support the actuating bracket 130 and the brake lever 110 to rotate a small angle counterclockwise (see Figure 6 ) around the second pivot shaft 180, that is, the brake external force acts on the other end of the actuating bracket 130 in the direction of the solid arrow shown in Figure 6 , the actuating bracket 130 at one end exerts a force on the first pivot shaft 170 in the direction of the dashed arrow shown in Figure 6 , the first pivot shaft 170 moves a small distance along the sliding groove 121 / 121', and at the same time, the piston rod 142 is pulled out a small distance by the first pivot shaft 170 (that is, the initial position of the piston rod 142 relative to the main cylinder body 141 is adjusted), see Figure 8 , the distance between the vertical plane where the first contact sealing surface is located and the oil inlet 143 is shortened, that is, the idle stroke is shortened to D.

[0095] With the length of the part of the first adjusting member 190 extending out of the first adjusting cavity 131 abutting against the supporting surface, the size of the force exerted by the actuating bracket 130 at one end on the first pivot shaft 170 can be adjusted, so that the distance by which the piston rod 142 is pulled out by the first pivot shaft 170 can be adjusted, thereby achieving the adjustment of the size of the idle stroke.

[0096] After the adjustment of the first adjusting member 190 is completed, the first adjusting member 190 can maintain the initial position of the piston rod 142 after movement, and then in the process of using the oil brake, if the initial position does not need to be changed, the first adjusting member 190 will not be operated.

[0097] In the process of using the oil brake, when the brake external force is applied to the brake lever 110, the external force is transmitted to the first pivot shaft 170 by the actuating support 130, and then the piston rod 142 moves from the initial position after the change of the free stroke, and then the oil is applied to the brake clamp to achieve braking.

[0098] Referring to Figure 7 , Figure 10 and Figure 11 , the first adjusting member 190 includes a first end 191, a rod portion 192 and a second end 193, the rod portion 192 connects the first end 191 and the second end 193, and the rod portion 192 is formed with external threads, and the first adjusting cavity 131 is provided with internal threads, when the external force is applied to the first end 191, the rod portion is screwed with the first adjusting cavity 131, so that the second end 193 extends out of the first adjusting cavity 131, and the free end further extends and abuts against the side of the body 120 close to the actuating support 130.

[0099] In some embodiments of the present application, in order to avoid the first adjusting member 190 from retracting, referring to Figure 11 , a limiting member 194 is sleeved on the second end 193, which is limited with the actuating support 130 to avoid the first adjusting member 190 from retracting too much in the direction opposite to the direction of the external force applied to the first end 191, causing the first adjusting member 190 to come out of the first adjusting cavity 131.

[0100] In some embodiments of the present application, the limiting member 194 is a snap spring.

[0101] In order to avoid the first adjusting member 190 from rotating relatively during vibration and movement, referring to Figure 11 , the oil brake further comprises a resistance washer 195.

[0102] The resistance washer 195 is arranged at the entrance of the first adjusting member 190 extending into the first adjusting cavity 131 and is sleeved on the rod portion 192.

[0103] The resistance washer 195 can be made of nylon or silicone, which increases the friction force and contact area between the resistance washer 195 and the rod portion 192, ensuring the stability of the first adjusting member 190.

[0104] In order to facilitate the application of force to the first adjusting member 190, the first end 191 is a bolt head suitable for tool operation (for example, a hexagonal hole), which facilitates the operation of the hexagonal hole by a standard hexagonal wrench, so that the first end 191 extends out of the first adjusting cavity 131 and further abuts the free end of the first end 191 against the body 120.

[0105] The above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, for those skilled in the art, the technical solutions recorded in the foregoing examples can still be modified, or some of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions claimed by the present application.

Claims

1. An oil brake adapted to be assembled to a handlebar of a vehicle, characterized in that, The oil brake comprises: a body, in which a pump assembly is arranged, the pump assembly having a main cylinder fixed in the body and a piston rod movably arranged in the main cylinder; a first pivot shaft pivotally connecting an extended end of the piston rod extending out of the main cylinder, the first pivot shaft being arranged in a sliding groove formed in the body; a brake lever; a lever support arranged in the brake lever, one end of the lever support extending into the body and abutting against a side surface of the first pivot shaft towards the main cylinder, a first adjusting cavity being formed in the lever support, the lever support and the brake lever being pivotally connected to the body by a second pivot shaft, the other end of the lever support abutting against an inner side wall of the brake lever; a first adjusting member arranged in the first adjusting cavity, a free end of the first adjusting member extending out of the first adjusting cavity abutting against a side surface of the body close to the lever support under the action of an external force, so that one end of the lever support applies a force to the first pivot shaft, the first pivot shaft moves along the sliding groove to adjust an initial position of the piston rod relative to the main cylinder, and after the adjustment is completed, the first adjusting member can maintain the initial position after the movement.

2. The oil brake according to claim 1, wherein The first adjusting member has a first end portion, a rod portion and a second end portion, the rod portion connecting the first end portion and the second end portion and having an external thread formed thereon, an inner thread formed on an inner side wall of the first adjusting cavity matching the external thread, and the oil brake further comprises: a limiting member arranged on the second end portion and limiting the lever support when the second end portion extends out of the first adjusting cavity; a resistance washer arranged at an entrance of the first adjusting member extending into the first adjusting cavity and sleeved on the rod portion.

3. The oil brake according to claim 2, wherein The first end portion is a bolt head suitable for tool operation; when an external force is applied to the first end portion by operating a tool, a free end of the second end portion abuts against a side surface of the body close to the lever support.

4. The oil brake according to claim 1, wherein The body is concave to form a secondary oil reservoir, and the oil brake further comprises: a secondary cylinder cover fixed to the body and used for closing the secondary oil reservoir, the secondary oil reservoir having an oil pressure outlet, and the main cylinder having an oil pressure inlet, the oil pressure inlet being in communication with the oil pressure outlet.

5. The oil brake according to claim 1, wherein An oil pressure inlet is formed on an inner side wall of the main cylinder, and the pump assembly further comprises: at least one sealing ring arranged in the main cylinder and sleeved on the piston rod at intervals, one of the sealing rings forming a first sealing contact surface with the inner side wall of the main cylinder, the distance between the normal plane of the first sealing contact surface and the oil pressure inlet being defined as an idle stroke, and the length of the idle stroke being adjusted when one end of the lever support applies a force to the first pivot shaft.

6. The oil brake according to claim 1, wherein The oil brake further comprises: a first pivot sleeve sleeved on a first part of the first pivot shaft on one side of the pivot position of the piston rod and the first pivot shaft; a second pivot sleeve sleeved on a second part of the first pivot shaft on the other side of the pivot position of the piston rod and the first pivot shaft; one end of the lever support abutting against a side surface of the first pivot sleeve and / or the second pivot sleeve towards the main cylinder.

7. The oil brake according to claim 1, wherein One end of the toggle support has a first leg and a second leg in parallel, the first leg abuts the first pivot shaft at a first part on one side of the piston rod and the first pivot shaft pivot position, and the second leg abuts the first pivot shaft at a second part on the other side of the piston rod and the first pivot shaft pivot position.

8. The oil brake according to claim 1, wherein The other end of the toggle support is provided with a second adjusting cavity. The oil brake further comprises: A second adjusting member is arranged in the second adjusting cavity, and the part of the second adjusting member extending out of the second adjusting cavity abuts the inner side wall of the brake lever.

9. The oil brake according to claim 8, wherein A limiting groove is arranged on the inner side wall of the brake lever corresponding to the end of the second adjusting member extending out of the second adjusting cavity. A reinforcing block is arranged in the limiting groove, and the end of the second adjusting member extending out of the second adjusting cavity abuts the reinforcing block.

10. The oil brake according to claim 8, wherein The oil brake further comprises: A housing surrounds a containing space, and the body is arranged in the containing space; A bushing is arranged to close the part exposed outside the connection between the brake lever and the body which is not closed by the housing.

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