Brake master cylinder

Abstract

The utility model discloses a brake master cylinder which comprises a master cylinder body, a piston, a push rod, a reset spring, an oil outlet and an oil inlet and further comprises a pair of abrasion-resistant assemblies, a pair of friction-resistant assemblies and a pair of friction-resistant assemblies. The wear-resistant assembly comprises a plurality of mounting grooves which are uniformly distributed in the outer wall of the piston; the balls are rotatably mounted in the mounting grooves respectively; wherein the outer walls of the balls are all in contact with the inner wall of the master cylinder body, and in daily production and life, friction between the piston and the inner wall of the master cylinder body is reduced through the arrangement of the mounting groove and the balls, so that the service life of the master cylinder body is prolonged.

Description

Technical Field

[0001] The utility model relates to a brake master cylinder. Background Art

[0002] The automobile brake master cylinder is a component of the hydraulic brake system. The hydraulic automobile brake system currently used consists of a brake oil tank, a brake master cylinder, a brake booster, a brake hose, a brake cylinder, a brake disc, and a brake pad. The brake master cylinder is connected to the brake hose, and the brake hose is connected to the front and rear brake cylinders of the car. The brake cylinder pushes the brake pad. When braking, the brake oil pressure in the pipeline enters the brake cylinder through the master cylinder, the hose, and the cylinder, pushing the brake pad to hold the brake disc and stop the vehicle. In the existing automobile brake master cylinder, especially during long-term use, the internal oil residue cannot be handled in time, so that the subsequent performance is affected. There are structural deficiencies and needs to be improved.

[0003] There is a brake master cylinder that can handle oil residue, for example, a brake master cylinder for automobiles with patent number CN217455943U, which includes a master cylinder body with a cavity formed inside, a piston is arranged in the cavity, a return spring is arranged between the piston and the bottom of the cavity, and a push rod extending to the outside of the cavity is arranged at one end of the piston; the characteristic is that: a recessed area is formed on the master cylinder body, an oil outlet and an oil return port communicating with the interior of the cavity are arranged in the recessed area, a matching deslagging device is arranged between the oil outlet and the oil return port, and the brake oil inside the cavity enters the deslagging device through the oil outlet, and then enters the cavity through the oil return port.

[0004] This embodiment can clean the debris inside the brake master cylinder by setting a slag remover, and prevent the debris from entering the interior and affecting the overall operating performance, but it has the following defects:

[0005] 1. The piston directly rubs against the inner wall of the pump body, which is easy to wear and the braking effect is poor;

[0006] 2. When the oil is introduced, backflow is likely to occur, wasting oil. Summary of the invention

[0007] The utility model aims to solve one of the technical problems existing in the prior art.

[0008] The present application provides a brake master cylinder, including a master cylinder body, a piston, a push rod, a return spring, an oil outlet and an oil inlet, and also includes:

[0009] A one-way sealing assembly, which is fixedly installed at the oil inlet end;

[0010] A pair of wear-resistant components, which are respectively arranged at both ends of the piston;

[0011] Wear-resistant components include:

[0012] A plurality of mounting grooves are evenly distributed on the outer wall of the piston;

[0013] A plurality of balls are rotatably mounted in each mounting groove;

[0014] Among them, the outer walls of several balls are in contact with the inner wall of the master cylinder body.

[0015] Also includes:

[0016] A plurality of oil guide channels are respectively fixedly connected between each group of two mounting grooves.

[0017] Also includes:

[0018] A plurality of annular grooves are arranged at equal intervals on the outer wall of the piston;

[0019] Among them, a plurality of annular grooves are located between a pair of wear-resistant components.

[0020] The one-way seal assembly includes:

[0021] A fixed sleeve, which is fixedly installed on the oil inlet;

[0022] A filter plate is fixedly mounted on the top of the fixed sleeve;

[0023] A sealing cover, which is movably mounted on the bottom end of the fixed sleeve;

[0024] The driving assembly is movably connected between the filter plate and the sealing cover.

[0025] The drive components include:

[0026] A connecting rod, which is fixedly connected to the filter plate;

[0027] A slider, the sliding sleeve of which is arranged on the connecting rod, and the lower end of which is fixedly connected with a sealing cover;

[0028] The damping spring is fixedly connected between the filter plate and the slider.

[0029] Also includes:

[0030] A damping block, which is fixedly connected between the filter plate and the connecting rod;

[0031] A plurality of support bars, which are respectively fixedly connected between the outer wall of the slider and the inner wall of the fixed sleeve;

[0032] Among them, several support bars are made of elastic material.

[0033] The beneficial effects of the utility model are as follows:

[0034] 1. The friction between the piston and the inner wall of the master cylinder is reduced by setting the mounting groove and the ball;

[0035] 2. Through the setting of the fixed sleeve, filter plate, sealing cover and driving assembly, the oil inlet is sealed in a one-way manner to prevent backflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a front view of a brake master cylinder in an embodiment of the present application;

[0037] Figure 2 A cross-sectional view of a brake master cylinder in an embodiment of the present application;

[0038] Figure 3 A cross-sectional view of a piston in an embodiment of the present application;

[0039] Figure 4 Based Figure 2 A schematic diagram of the enlarged local structure in the middle.

[0040] Reference numerals

[0041] 1-main pump body, 2-piston, 3-push rod, 4-reset spring, 5-oil outlet, 6-oil inlet, 7-wear-resistant component, 8-mounting groove, 9-ball, 10-oil guide channel, 11-ring groove, 12-one-way sealing component, 13-fixing sleeve, 14-filter plate, 15-sealing cover, 16-driving component, 17-connecting rod, 18-slider, 19-shock-absorbing spring, 20-damping block, 21-support bar, 22-sleeve. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0043] The terms "first", "second", etc. 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 interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0044] The server provided in the embodiment of the present application is described in detail below through specific embodiments and application scenarios in conjunction with the accompanying drawings.

[0045] Embodiment 1:

[0046] like Figures 1 to 3 As shown, an embodiment of the present application provides a brake master cylinder, including a master cylinder body 1, a piston 2, a push rod 3, a return spring 4, an oil outlet 5 and an oil inlet 6, and also includes: a pair of wear-resistant components 7, which are respectively arranged at both ends of the piston 2.

[0047] Furthermore, the wear-resistant component 7 includes a plurality of mounting grooves 8 which are evenly distributed on the outer wall of the piston 2 ; a plurality of balls 9 which are rotatably mounted in each mounting groove 8 ; wherein the outer walls of the plurality of balls 9 are in contact with the inner wall of the main pump body 1 .

[0048] Furthermore, it also includes a plurality of oil guide channels 10 which are respectively fixedly connected between each group of two mounting grooves 8 .

[0049] Furthermore, it also includes a plurality of annular grooves 11 which are arranged at equal intervals on the outer wall of the piston 2 ; wherein the plurality of annular grooves 11 are located between a pair of wear-resistant components 7 .

[0050] In this embodiment of the present application, due to the adoption of the above-mentioned structure, when the brake master cylinder is in use, the push rod 3 pushes the piston 2 to move back and forth in the inner cavity of the master cylinder body 1, and the outer wall of the piston 2 rubs against the inner wall of the master cylinder body 1. A number of mounting grooves 8 are provided on the outer walls at both ends of the piston 2. The mounting grooves 8 are arranged in multiple groups of matrices, and each group of fixed grooves is provided with two. A ball 9 is movably installed in each mounting groove 8. When the piston 2 moves in the master cylinder body 1, the ball 9 rolls inside the mounting groove 8. The provision of the ball 9 reduces the contact area between the piston 2 and the master cylinder body 1, thereby reducing the friction between the piston 2 and the master cylinder body 1, and an oil guide channel 10 is connected between each group of mounting grooves 8. Lubricating oil can be stored inside the oil guide channel 10 to ensure the rolling performance of the ball 9, and it is also convenient to add lubricating oil to the mounting groove 8 at a later time, further reducing the friction between the piston 2 and the master cylinder body 1 and improving the service life of the master cylinder body 1.

[0051] Furthermore, annular grooves 11 are arranged at equal intervals on the outer wall of the piston 2 . The provision of the annular grooves 11 reduces the contact area between the piston 2 and the main pump body 1 , and further reduces the friction between the piston 2 and the main pump body 1 .

[0052] Embodiment 2:

[0053] like Figure 2 , Figure 4 As shown, in this embodiment, in addition to the structural features of the aforementioned embodiments, it also includes: a one-way sealing component 12, which is fixedly installed at the end of the oil inlet 6.

[0054] Furthermore, the one-way sealing assembly 12 includes a fixed sleeve 13, which is fixedly installed on the oil inlet 6; a filter plate 14, which is fixedly installed on the top end of the fixed sleeve 13; a sealing cover 15, which is movably installed on the bottom end of the fixed sleeve 13; and a driving assembly 16, which is movably connected between the filter plate 14 and the sealing cover 15.

[0055] Furthermore, the driving assembly 16 includes a connecting rod 17, which is fixedly connected to the filter plate 14; a slider 18, which is slidably sleeved on the connecting rod 17 and has a sealing cover 15 fixedly connected to its lower end; and a shock-absorbing spring 19, which is fixedly connected between the filter plate 14 and the slider 18.

[0056] Furthermore, it also includes a damping block 20, which is fixedly connected between the filter plate 14 and the connecting rod 17; a plurality of support bars 21, which are respectively fixedly connected between the outer wall of the slider 18 and the inner wall of the fixed sleeve 13; wherein the plurality of support bars 21 are made of elastic material.

[0057] In this embodiment of the present application, due to the adoption of the above-mentioned structure, in order to avoid the phenomenon of oil backflow after oil intake during oil delivery, a one-way sealing assembly 12 is provided at the oil inlet 6. Oil is added from the oil inlet 6, and the oil flows in from the filter holes of the filter plate 14. The pressure of the oil squeezes each support bar 21, and the support bar 21 deforms downward, thereby driving the sealing cover 15 to move downward along the connecting rod 17 through the slider 18. At the same time, the shock-absorbing spring 19 is extended, the sealing cover 15 is separated from the bottom end of the fixing sleeve 13, and the oil flows into the lower port of the fixing sleeve 13 and enters the interior of the main pump body 1. When the internal pressure of the main body is greater than the pressure when the oil is intake, the internal pressure pushes the sealing cover 15 upward, and the sealing cover 15 moves upward and blocks the lower port of the fixing sleeve 13. At the same time, the shock-absorbing spring 19 is shortened, and the slider 18 moves upward along the connecting rod 17, thereby avoiding the phenomenon of oil backflow and avoiding oil waste.

[0058] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0059] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A brake master cylinder, comprising a master cylinder body (1), a piston (2), a push rod (3), a return spring (4), an oil outlet (5) and an oil inlet (6), characterized in that: Also includes: A one-way sealing assembly (12) fixedly mounted on the end of the oil inlet (6); A pair of wear-resistant components (7) respectively arranged at two ends of the piston (2); The wear-resistant component (7) comprises: A plurality of mounting grooves (8) uniformly distributed on the outer wall of the piston (2); A plurality of balls (9) which are rotatably mounted in the mounting grooves (8); The outer walls of several of the balls (9) are in contact with the inner wall of the main pump body (1).

2. A brake master cylinder according to claim 1, characterized in that: Also includes: A plurality of oil guide channels (10) are respectively fixedly connected between each group of two mounting grooves (8).

3. A brake master cylinder according to claim 1, characterized in that: Also includes: A plurality of annular grooves (11) arranged at equal intervals on the outer wall of the piston (2); Wherein, a plurality of the annular grooves (11) are located between a pair of wear-resistant components (7).

4. A brake master cylinder according to claim 1, characterized in that: The one-way sealing assembly (12) comprises: A fixed sleeve (13) fixedly mounted on the oil inlet (6); A filter plate (14) fixedly mounted on the top of the fixing sleeve (13); A sealing cover (15) movably mounted on the bottom end of the fixing sleeve (13); A driving assembly (16) is movably connected between the filter plate (14) and the sealing cover (15).

5. A brake master cylinder according to claim 4, characterized in that: The drive assembly (16) comprises: A connecting rod (17) fixedly connected to the filter plate (14); A slider (18) is slidably sleeved on the connecting rod (17), and a sealing cover (15) is fixedly connected to the lower end thereof; A damping spring (19) is fixedly connected between the filter plate (14) and the slide block (18).

6. A brake master cylinder according to claim 5, characterized in that: Also includes: A damping block (20) fixedly connected between the filter plate (14) and the connecting rod (17); A plurality of support bars (21) which are respectively fixedly connected between the outer wall of the sliding block (18) and the inner wall of the fixing sleeve (13); Wherein, a plurality of the support bars (21) are made of elastic material.

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