Brake master cylinder

Abstract

The utility model discloses a brake master cylinder which comprises a cylinder body, a push rod, a piston, a spring and a sealing ring. An oil inlet pipe is arranged at the top end of the pump body, a connecting pipe is slidably mounted in the oil inlet pipe, a locking groove is formed in the peripheral wall of the connecting pipe, a plurality of mounting grooves are circumferentially distributed in the oil inlet pipe at equal intervals, locking pieces are arranged in the mounting grooves, and an unlocking circular ring is rotatably mounted at the top end of the pump body and can drive the locking pieces to rotate synchronously. One end of the locking piece extends out of the corresponding mounting groove and is positioned in the locking groove; an oil tank is arranged at the top end of the connecting pipe; through the arrangement of the locking piece and the unlocking circular ring, the oil tank can be rapidly disassembled without disassembling a bolt, and through the arrangement of the friction layer, the circular ring block is not prone to rotating due to vibration in the moving process of an automobile; and through the arrangement of the valve seat, the plugging block, the sliding block and the elastic piece, the oil inlet pipe can be blocked in a one-way mode, and backflow is avoided.

Description

Technical Field

[0001] This utility model relates to the field of brake master cylinder technology, and in particular to a brake master cylinder. Background Technology

[0002] The master cylinder is the core component of a car's braking system. It is responsible for converting the force of the driver pressing the brake pedal into the pressure of brake fluid (or gas), and then transmitting this pressure to the brake calipers of each wheel. This pressure pushes the brake pads against the brake discs (or brake drums), generating friction to slow the vehicle down or stop it. The performance of the master cylinder directly affects the sensitivity and effectiveness of braking, making it a crucial device for ensuring driving safety.

[0003] For example, Chinese utility model CN217455942U discloses an improved automotive hydraulic brake master cylinder, which includes a master cylinder body with an internal cavity, a piston inside the cavity, a return spring between the piston and the bottom of the cavity, and a push rod extending to the outside of the cavity at one end of the piston; an oil tank is provided on the master cylinder body, and an installation port is formed on the master cylinder body; a buffer device is provided between the oil tank and the installation port. This utility model, through the setting of the buffer device, can buffer the impact between brake fluids without affecting the flow of brake fluid, thus improving the performance of the automotive hydraulic brake master cylinder. However, such a structure still has the following significant drawbacks:

[0004] 1. Currently, the oil tank is usually fixed to the pump body with bolts, which is troublesome to disassemble and assemble, affecting maintenance efficiency;

[0005] 2. When adding oil, backflow is likely to occur, wasting oil. Summary of the Invention

[0006] This utility model aims to solve one of the technical problems existing in the prior art.

[0007] This application provides a brake master cylinder, including a pump body, a push rod, a piston, a spring, and a sealing ring; the top of the pump body is provided with an oil inlet pipe, a connecting pipe is slidably installed inside the oil inlet pipe, a locking groove is provided on the outer peripheral wall of the connecting pipe, and a plurality of mounting grooves are evenly spaced and distributed on the oil inlet pipe, each mounting groove is provided with a locking element, and an unlocking ring is rotatably installed on the top of the pump body, the unlocking ring can drive the plurality of locking elements to rotate synchronously, thereby causing one end of the locking element to extend out of the corresponding mounting groove and be located in the locking groove;

[0008] An oil tank is located at the top of the connecting pipe.

[0009] Further, the unlocking ring comprises a ring block, an internal gear, rotating blocks and a top block, the pump body is provided with rotating grooves, a plurality of rotating blocks are rotatably installed in the rotating grooves, the ring block is fixedly installed with the rotating blocks, the top block is fixedly installed at the top end of the ring block, the inner peripheral wall of the top block is attached to the outer peripheral wall of the oil inlet pipe, and the internal gear is fixedly arranged on the inner peripheral wall of the ring block.

[0010] Further, the locking members each comprise a rotating shaft, a rotating gear and a locking block, the rotating shaft is fixedly arranged in the mounting groove, the rotating gear is rotatably installed on the rotating shaft, and the locking block is fixedly arranged on the rotating gear.

[0011] Further, the outer peripheral wall of the ring block is provided with anti-skid lines.

[0012] Further, the rotating grooves are dovetail grooves, and the rotating blocks are dovetail blocks in sliding fit with the rotating grooves.

[0013] Further, the end face of the rotating block attached to the rotating groove is provided with a friction layer.

[0014] Further, the valve seat and the blocking block are further included, the valve seat is fixedly installed in the oil inlet pipe, the sliding groove is arranged in the valve seat, the sliding block is arranged on the blocking block in sliding fit with the sliding groove, the elastic sheet is arranged in the sliding groove, the bottom of the blocking block is pressed against the lower end of the valve seat by the elastic sheet, and the lower end of the valve seat is blocked.

[0015] Further, the elastic sheet is in < shape, the bottom end of the elastic sheet is fixedly installed on the sliding groove, and the top end of the elastic sheet is fixedly installed on the sliding block.

[0016] The beneficial effects of the utility model are as follows:

[0017] 1. Through the arrangement of the locking members and the unlocking ring, the oil tank can be quickly disassembled without disassembling the bolts, and through the arrangement of the friction layer, the ring block is not easy to rotate due to vibration in the movement process of the automobile.

[0018] 2. Through the arrangement of the valve seat, the blocking block, the sliding block and the elastic sheet, the oil inlet pipe can be one-way blocked, and backflow is avoided. DRAWINGS

[0019] Figure 1 It is a structure schematic view of a brake master pump in the embodiment of the application;

[0020] Figure 2 It is an internal structure schematic view of a brake master pump in the embodiment of the application;

[0021] Figure 3 It is Figure 1 It is a sectional structure schematic view in the A-A direction;

[0022] Figure 4 It is Figure 2An enlarged structural schematic view at B;

[0023] Figure 5 As Figure 4 An enlarged structural schematic view at C;

[0024] Figure 6 A top view of the blocking block and the sliding block in the embodiment of the present application.

[0025] Reference signs

[0026] 1-pump body, 11-oil inlet pipe, 12-mounting groove, 13-locking member, 131-rotation shaft, 132-rotation gear, 133-locking block, 14-unlocking ring, 141-ring block, 142-internal gear, 143-rotation block, 144-top block, 145-non-slip pattern, 146-friction layer, 15-rotation groove, 2-push rod, 3-piston, 4-spring, 5-sealing ring, 61-connection pipe, 62-locking groove, 63-oil tank, 71-valve seat, 72-blocking block, 73-sliding groove, 74-sliding block, 75-spring piece. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present application.

[0028] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be exchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally a category and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in an "or" relationship.

[0029] A kind of brake master pump provided by the embodiment of the present application will be described in detail below with reference to the drawings by specific embodiment and its application scene.

[0030] Embodiment 1:

[0031] As Figures 1 to 5As shown, the embodiment of the present application provides a brake master cylinder, which comprises a pump body 1, a push rod 2, a piston 3, a spring 4 and a sealing ring 5; the top end of the pump body 1 is provided with an oil inlet pipe 11, a connecting pipe 61 is slidably installed in the oil inlet pipe 11, a locking groove 62 is arranged on the outer circumferential wall of the connecting pipe 61, a plurality of installation grooves 12 are circumferentially distributed at equal intervals on the oil inlet pipe 11, a locking piece 13 is arranged in each installation groove 12, an unlocking ring 14 is rotatably installed at the top end of the pump body 1, the unlocking ring 14 can drive the plurality of locking pieces 13 to rotate synchronously, so that one end of each locking piece 13 extends out of the corresponding installation groove 12 and is located in the locking groove 62; wherein the top end of the connecting pipe 61 is provided with an oil tank 63.

[0032] Further, the unlocking ring 14 comprises a ring block 141, an internal gear 142, a rotating block 143 and a top block 144, the pump body 1 is provided with a rotating groove 15, a plurality of rotating blocks 143 are rotatably installed in the rotating groove 15, the ring block 141 is fixedly installed with the plurality of rotating blocks 143, the top block 144 is fixedly installed at the top end of the ring block 141, the inner circumferential wall of the top block 144 is in abutment with the outer circumferential wall of the oil inlet pipe 11, and the internal gear 142 is fixedly arranged on the inner circumferential wall of the ring block 141.

[0033] Further, each locking piece 13 comprises a rotating shaft 131, a rotating gear 132 and a locking block 133, the rotating shaft 131 is fixedly arranged in the installation groove 12, the rotating gear 132 is rotatably installed on the rotating shaft 131, and the locking block 133 is fixedly arranged on the rotating gear 132, wherein the rotating gear 132 is in meshing connection with the internal gear 142.

[0034] Further, the outer circumferential wall of the ring block 141 is provided with anti-skid lines 145.

[0035] Further, the rotating groove 15 is a dovetail groove, and the rotating block 143 is a dovetail block in sliding connection with the rotating groove 15.

[0036] Further, the rotating block 143 is provided with a friction layer 146 on the end face in abutment with the rotating groove 15.

[0037] In this embodiment of the present application, due to the adoption of the above structure, the piston 3 is slidably installed in the pump body 1, one end of the piston 3 is fixedly connected with the push rod 2, the other end is installed with the spring 4, the inside of the piston 3 is further installed with the sealing ring 5, the push rod 2 is connected with the brake pedal, when the driver steps on the brake pedal, the piston 3 in the pump body 1 will push the brake oil forward, and generate pressure in the oil circuit, the pressure is transmitted to the brake cylinder of each wheel through the brake oil, then the brake cylinder cooperates with the corresponding brake pad to brake, thereby completing the brake operation.

[0038] When the oil tank 63 needs to be disassembled, the circular block 141 is rotated clockwise. Since the internal gear 142 fixed on the inner wall of the circular block 141 is engaged with the rotating gear 132, the clockwise rotation of the circular block 141 can drive the rotating gear 132 to rotate clockwise around the corresponding rotating shaft 131 axis. During the clockwise rotation of the rotating gear 132, the one end of the corresponding locking block 133 is completely withdrawn into the corresponding installation slot 12 and is separated from the locking slot 62, thereby releasing the locking of the connecting pipe 61. When a pair of connecting pipes 61 are both released, the oil tank 63 can be removed from the pump body 1, so that the oil tank 63 can be conveniently replaced and the oil residue at the connection can be cleaned.

[0039] When the oil tank 63 needs to be reinstalled, the two connecting pipes 61 on the oil tank 63 are respectively inserted into the corresponding oil inlet pipe 11 until they cannot be inserted any further. At this time, the locking slot 62 is aligned with the installation slot 12. Then the circular block 141 is rotated counterclockwise. Since the internal gear 142 fixed on the inner wall of the circular block 141 is engaged with the rotating gear 132, the counterclockwise rotation of the circular block 141 can drive the rotating gear 132 to rotate counterclockwise around the corresponding rotating shaft 131 axis. During the counterclockwise rotation of the rotating gear 132, the one end of the corresponding locking block 133 is extended into the corresponding installation slot 12 and slides into the locking slot 62, thereby locking the connecting pipe 61. When a pair of connecting pipes 61 are both locked, the oil tank 63 is installed.

[0040] The outer wall of the circular block 141 is provided with anti-skid lines 145 to prevent hand slipping when rotating the circular block 141.

[0041] The rotating slot 15 is a dovetail slot, and the rotating block 143 is a dovetail block that slides with the rotating slot 15, so that the rotating block 143 is always embedded in the rotating slot 15, improving its stability during use.

[0042] The rotating block 143 is provided with a friction layer 146 on the end face of the rotating slot 15. The friction layer 146 can appropriately increase the friction between the rotating block 143 and the rotating slot 15, so that the circular block 141 is not easily rotated due to vibration during the movement of the automobile.

[0043] Example 2:

[0044] As shown in Figure 4 and Figure 6 In this embodiment, in addition to the structural features of the preceding embodiments, a valve seat 71 and a blocking block 72 are included. The valve seat 71 is fixedly installed in the oil inlet pipe 11. The valve seat 71 is provided with a sliding groove 73. The blocking block 72 is provided with a sliding block 74 that slides with the sliding groove 73. The sliding groove 73 is provided with a spring 75 that can press the bottom of the blocking block 72 against the lower end of the valve seat 71, thereby blocking the lower end of the valve seat 71.

[0045] Further, the elastic sheet 75 is in < shape, the bottom end of the elastic sheet 75 is fixedly installed on the sliding groove 73, and the top end is fixedly installed on the sliding block 74.

[0046] In the embodiment of the present application, when the brake oil is added from the oil inlet pipe 11, the brake oil first passes through the filter screen installed in the oil inlet pipe 11, then a downward pressure is generated on the blocking block 72, and the blocking block 72 and the sliding block 74 thereon are synchronously slid downward, the sliding block 74 extrudes the elastic sheet 75, so that the elastic sheet 75 is deformed, at this time, the blocking block 72 is separated from the lower port of the valve seat 71, at this time, the brake oil can flow into the pump body 1, when the internal pressure of the pump body 1 is greater than the pressure when the oil is added, the internal pressure and the elastic force of the elastic sheet 75 jointly push the blocking block 72, so that the blocking block 72 is slid upward, and the lower port of the valve seat 71 is re-sealed, so as to avoid the backflow phenomenon of the brake oil, and avoid the waste of the brake oil.

[0047] It should be noted that in this document, the terms "comprise", "comprising", or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements, but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, an element defined by the statement "comprising a" does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element. In addition, it should be pointed out that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but can also include performing functions in a substantially simultaneous manner or in reverse order, for example, the described method can be performed in an order different from that described, and various steps can also be added, omitted, or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0048] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above specific embodiments, the above specific embodiments are only illustrative, but not limiting, and those skilled in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the scope protected by the claims.

Claims

1. A master cylinder comprising a cylinder body, a push rod, a piston, a spring and a seal ring, characterized in that, The top end of the pump body is provided with an oil inlet pipe, a connecting pipe is slidably installed in the oil inlet pipe, a plurality of installation grooves are circumferentially distributed on the oil inlet pipe at equal intervals, a locking piece is arranged in each installation groove, an unlocking ring is rotatably installed on the top end of the pump body, the unlocking ring can drive the plurality of locking pieces to rotate synchronously, and then the one end of the locking piece extends out of the corresponding installation groove and is located in the locking groove. The top end of the connecting pipe is provided with an oil tank.

2. A master cylinder according to claim 1, wherein The unlocking ring comprises a ring block, an internal gear, a rotating block and a top block, the pump body is provided with a rotating groove, a plurality of rotating blocks are rotatably installed in the rotating groove, the ring block is fixedly installed with the plurality of rotating blocks, the top end of the ring block is fixedly installed with the top block, the inner circumferential wall of the top block is attached to the outer circumferential wall of the oil inlet pipe, and the internal gear is fixedly arranged on the inner circumferential wall of the ring block.

3. A master cylinder according to claim 2, wherein The locking piece comprises a rotating shaft, a rotating gear and a locking block, the rotating shaft is fixedly arranged in the installation groove, the rotating gear is rotatably installed on the rotating shaft, and the locking block is fixedly arranged on the rotating gear.

4. A master cylinder according to claim 2, wherein The outer circumferential wall of the ring block is provided with anti-skid lines.

5. A master cylinder according to claim 2, wherein The rotating groove is a dovetail groove, and the rotating block is a dovetail block that is slidably matched with the rotating groove.

6. A master cylinder according to claim 2 wherein, The end face of the rotating block that is attached to the rotating groove is provided with a friction layer.

7. A master cylinder according to claim 1 wherein, The oil inlet pipe is fixedly installed with a valve seat, the valve seat is provided with a sliding groove, the blocking piece is provided with a sliding block that is slidably matched with the sliding groove, the sliding groove is provided with an elastic sheet, the bottom of the blocking piece is pressed against the lower end of the valve seat by the elastic sheet, and the lower end of the valve seat is blocked.

8. A master cylinder according to claim 7, wherein The elastic sheet is in a < shape, the bottom end of the elastic sheet is fixedly installed on the sliding groove, and the top end of the elastic sheet is fixedly installed on the sliding block.

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