A single cavity mounting plate assembly for a brake master cylinder

Abstract

This utility model relates to the field of automotive parts technology, specifically a single-chamber mounting plate assembly for a brake master cylinder. It includes a mounting plate, a mounting plate connecting seat, a P-piston assembly, and mounting screws. The mounting plate has a through-hole for positioning. The mounting plate connecting seat is connected to the mounting plate and has a positioning protrusion on its outer side wall. The P-piston assembly includes a push rod, a P-piston, and a push rod seat. One end of the push rod is riveted to the push rod seat, and the other end is connected to the P-piston, extending through the mounting plate connecting seat. The mounting screws pass through the positioning hole, fixing the assembly to the valve block. This utility model eliminates the loosening and impact noise of traditional connections through the riveted connection of the P-piston assembly. The mounting plate and connecting seat are fitted with a 30-50mm interference fit, reducing vibration displacement and resonance, effectively lowering brake master cylinder noise, improving overall vehicle quietness, and meeting the requirements of one-box brake-by-wire systems.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and specifically to a single-chamber mounting plate assembly for a brake master cylinder. Background Technology

[0002] With the development of autonomous driving technology, drive-by-wire chassis technology is widely used in vehicle design. The brake master cylinder is a key component of the one-box brake-by-wire system, responsible for converting brake pedal force into hydraulic or pneumatic transmission. As an important part of the brake master cylinder, the performance of the mounting plate assembly is directly related to the NVH performance of the brake master cylinder, and the industry is increasingly demanding higher performance and noise reduction requirements for it.

[0003] However, the existing mounting plate assembly has obvious defects: First, there is no effective noise reduction measure for the return of the first piston, which is prone to noise during use and affects NVH performance; Second, the structure is complex and the assembly process is cumbersome, making it inconvenient for production and use; Third, most of them are made of die-cast aluminum, which not only has high unit cost, but also low yield during manufacturing, making it difficult to adapt to the large-scale application needs of one-box wire control brake products, and urgently needs to be optimized and improved. Utility Model Content

[0004] To address the problems of the prior art, this utility model provides a single-chamber mounting plate assembly for a brake master cylinder.

[0005] The objective of this utility model can be achieved through the following technical solution: A single-chamber mounting plate assembly for a brake master cylinder includes: a mounting plate, a mounting plate connecting seat, a P-piston assembly, and mounting screws. The mounting plate has a through-hole, and the mounting plate connecting seat is connected to the mounting plate and has a positioning protrusion on its outer side wall. The positioning protrusion is used for positioning and cooperating with the valve block of the brake master cylinder. The P-piston assembly includes a push rod, a P-piston, and a push rod seat. One end of the push rod is riveted to the push rod seat and the other end is connected to the P-piston. The P-piston assembly is disposed through the mounting plate connecting seat. The mounting screws pass through the positioning hole of the mounting plate to fix the entire assembly of the mounting plate, the mounting plate connecting seat, and the P-piston assembly onto the valve block.

[0006] In a further improvement, two positioning holes are provided, which are symmetrically distributed along the length of the mounting plate. Two mounting screws are provided corresponding to the positioning holes, and the shank of the mounting screw is adapted to the hole wall of the positioning hole.

[0007] In a further improvement, the mounting plate connector is provided with a positioning boss on the side facing the mounting plate, and the positioning boss is engaged and positioned with the positioning hole opened on the mounting plate.

[0008] In a further improvement, the push rod and the P piston are connected by ball joint, and the connection between the push rod and the P piston forms a spherical fitting structure. The outer side wall of the P piston is provided with an annular step, and the annular step is limited and matched with the inner side wall of the mounting plate connecting seat.

[0009] In a further improvement, at least two positioning protrusions are provided, and the at least two positioning protrusions are evenly distributed along the circumference of the mounting plate connecting seat. The positioning protrusions are arc-shaped protrusions, and the protrusion height of the positioning protrusions is adapted to the depth of the positioning groove on the valve block.

[0010] In a further improvement, the mounting plate is a metal stamping part, the mounting plate connecting seat is an injection molded part or a metal forging part, and the inner side wall of the mounting plate connecting seat is provided with a clearance hole for avoiding the P piston assembly, the diameter of the clearance hole being adapted to the outer diameter of the P piston.

[0011] In a further improvement, an elastic component is provided on the outer side of the P piston. The elastic component includes two sets of positioning rings sleeved on the P piston and a spring disposed between the two sets of positioning rings. A groove is provided on the positioning ring away from the push rod, and an O-ring is embedded in the groove.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This utility model completely eliminates the noise caused by loose parts and gap impact in traditional clearance fit or ordinary connection through the riveting connection of the P piston assembly; at the same time, the small interference fit between the mounting plate and the mounting plate connecting seat avoids the relative displacement when the components vibrate, further reducing resonance noise, which can effectively reduce the noise interference when the brake master cylinder is working and improve the overall vehicle ride quietness.

[0014] 2. This utility model adopts a modular design: the mounting plate and the connecting seat are quickly connected through the positioning protrusion and small interference fit, without the need for additional welding or multiple bolts. The riveting forming process of the P piston assembly replaces the traditional multi-part splicing, reducing tedious processes such as welding and adjustment. The cooperation between the positioning protrusion and the valve block can also save the repeated alignment steps during assembly, which not only shortens the assembly time of a single piece, but also reduces the skill requirements of the operators and reduces the product defect rate caused by assembly errors.

[0015] 3. The mounting plate of this utility model uses stamped parts instead of traditional die-cast aluminum: On the one hand, the stamping process has a higher material utilization rate and no defects such as casting porosity and shrinkage cavities, thus improving the yield. On the other hand, the structural strength of stamped parts is better than that of die-cast aluminum. Under the working environment of the brake master cylinder being subjected to high-pressure brake fluid for a long time, it is not easy to deform or be damaged, which indirectly reduces the after-sales maintenance cost of the whole vehicle. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the present invention;

[0018] Figure 3 This is an exploded view of the present invention.

[0019] In the diagram, 1 is the mounting plate; 11 is the positioning hole; 2 is the mounting plate connector; 21 is the positioning protrusion; 22 is the positioning boss; 23 is the clearance hole; 3 is the P piston assembly; 31 is the push rod; 32 is the P piston; 321 is the annular step; 33 is the push rod seat; 4 is the mounting screw; 5 is the elastic component; 51 is the positioning ring; 511 is the groove; 52 is the spring; and 53 is the O-ring. Detailed Implementation

[0020] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The following is a description of the embodiments and appendices. Figures 1-3 The technical solution of this utility model will be further described below.

[0023] Example 1

[0024] A single-chamber mounting plate assembly for a brake master cylinder includes: a mounting plate 1, a mounting plate connecting seat 2, a P-piston assembly 3, and mounting screws 4. The mounting plate 1 has a through-hole 11. The mounting plate connecting seat 2 is connected to the mounting plate 1 and has a positioning protrusion 21 on its outer side wall. The positioning protrusion 21 is used for positioning and engaging with the valve block of the brake master cylinder. The P-piston assembly 3 includes a push rod 31, a P-piston 32, and a push rod seat 33. One end of the push rod 31 is riveted to the push rod seat 33 and the other end is connected to the P-piston 32. The P-piston assembly 3 is integrally disposed through the mounting plate connecting seat 2. The mounting screws 4 pass through the positioning hole 11 of the mounting plate 1 to fix the entire assembly of the mounting plate 1, the mounting plate connecting seat 2, and the P-piston assembly 3 onto the valve block.

[0025] like Figures 1-3 As shown, in the actual assembly process of this utility model:

[0026] First, align the mounting plate 1 with the mounting plate connecting seat 2, use the positioning step of the mounting plate connecting seat 2 and the edge groove of the mounting plate 1 for pre-positioning, and apply pressure to make the two fit tightly together without relative shaking.

[0027] Next, insert one end of the push rod 31 into the reserved hole of the push rod seat 33, and apply axial pressure through the ball riveting device to make the push rod 31 and the push rod seat 33 form a ball riveting connection;

[0028] Next, insert the assembled P piston assembly 3 through the central through hole of the mounting plate connecting seat 2 from one end until the P piston 32 extends out of the other end of the connecting seat. During the process, ensure that the push rod 31 does not get stuck in the through hole of the connecting seat and that the resistance is uniform when pushing the assembly.

[0029] Next, align the positioning protrusion 21 on the outside of the mounting plate connecting seat 2 with the positioning groove of the brake master cylinder valve block, and gently push it in so that the protrusion is fully embedded in the groove. At this time, the positioning hole 11 of the mounting plate 1 is aligned with the threaded hole of the valve block, and the overall positioning is completed.

[0030] Finally, two mounting screws 4 are passed through the two positioning holes 11 of the mounting plate 1, so that the whole consisting of the mounting plate 1, the mounting plate connecting seat 2, and the P piston assembly 3 is firmly fixed to the valve block.

[0031] This utility model has the following beneficial effects:

[0032] 1. This utility model completely eliminates the noise caused by loose parts and gap impact in traditional clearance fit or ordinary connection through the riveting connection of the P piston assembly; at the same time, the small interference fit between the mounting plate and the mounting plate connecting seat avoids the relative displacement when the components vibrate, further reducing resonance noise, which can effectively reduce the noise interference when the brake master cylinder is working and improve the overall vehicle ride quietness.

[0033] 2. This utility model adopts a modular design: the mounting plate and the connecting seat are quickly connected through the positioning protrusion and small interference fit, without the need for additional welding or multiple bolts. The riveting forming process of the P piston assembly replaces the traditional multi-part splicing, reducing tedious processes such as welding and adjustment. The cooperation between the positioning protrusion and the valve block can also save the repeated alignment steps during assembly, which not only shortens the assembly time of a single piece, but also reduces the skill requirements of the operators and reduces the product defect rate caused by assembly errors.

[0034] 3. The mounting plate uses stamped parts instead of traditional die-cast aluminum: On the one hand, the stamping process has a higher material utilization rate and no defects such as casting porosity and shrinkage cavities, which improves the yield. On the other hand, the structural strength of stamped parts is better than that of die-cast aluminum. Under the working environment of the brake master cylinder being subjected to high-pressure brake fluid for a long time, it is not easy to deform or be damaged, which indirectly reduces the after-sales maintenance cost of the whole vehicle.

[0035] As a further preferred embodiment, two positioning holes 11 are provided, and the two positioning holes 11 are symmetrically distributed along the length direction of the mounting plate 1. Two mounting screws 4 are provided corresponding to the positioning holes 11, and the shank of the mounting screw 4 is adapted to the hole wall of the positioning hole 11.

[0036] Specifically, the symmetrically distributed positioning holes 11 and mounting screws 4 can evenly distribute the fixing force of the mounting plate assembly 2 on the valve block, avoiding component skewing and loosening caused by single-point fixing or asymmetrical fixing; the two positioning holes 11 form a bidirectional positioning reference, which can quickly align with the threaded holes of the valve block during assembly, reducing the time of repeated adjustments.

[0037] As a further preferred embodiment, the mounting plate connecting seat 2 is provided with a positioning boss 22 on the side facing the mounting plate 1, and the positioning boss 22 is engaged and positioned with the positioning hole 11 opened on the mounting plate 1.

[0038] Specifically, the positioning boss 22 and the positioning hole 11 are fitted together. During assembly, the positioning boss 22 only needs to be inserted into the positioning hole 11 to complete the pre-positioning. No additional adjustment is required, which shortens the assembly time. At the same time, it avoids secondary calibration when docking with the valve block, ensuring that the center axes of the two are consistent. It also avoids jamming when the P piston assembly 3 passes through due to misalignment after assembly, ensuring the smoothness of the reciprocating motion of the P piston 32 and reducing noise caused by friction.

[0039] As a further preferred embodiment, the push rod 31 and the P piston 32 are connected by ball riveting, and the connection part of the push rod 31 and the P piston 32 forms a spherical fitting structure. The outer side wall of the P piston 32 is provided with an annular step 321, and the annular step 321 is limited to the inner side wall of the mounting plate connecting seat 2.

[0040] Specifically, the ball-riveting connection and spherical mating structure between the push rod 31 and the P piston 32 eliminates the impact gap in traditional clearance fits or rigid connections, and there is no metal impact noise when the P piston 32 returns to its original position; the spherical mating can also reduce friction noise during relative motion, further optimizing NVH performance.

[0041] As a further preferred embodiment, at least two positioning protrusions 21 are provided, and the at least two positioning protrusions 21 are evenly distributed along the circumference of the mounting plate connecting seat 2. The positioning protrusions 21 are arc-shaped protrusion structures, and the protrusion height of the positioning protrusions 21 is adapted to the depth of the positioning groove on the valve block.

[0042] Specifically, at least two circumferentially evenly distributed positioning protrusions 21 can restrict the relative position of the component and the valve block from multiple directions, preventing the component from rotating around the central axis or shifting radially during assembly, and ensuring the coaxiality of the mounting plate component and the valve block.

[0043] As a further preferred embodiment, the mounting plate 1 is a metal stamping part, the mounting plate connecting seat 2 is an injection molded part or a metal forging part, and the inner side wall of the mounting plate connecting seat 2 is provided with a clearance hole 23 for avoiding the P piston assembly 3, the diameter of the clearance hole 23 being adapted to the outer diameter of the P piston 32.

[0044] Specifically, mounting plate 1 uses stamped parts instead of traditional die-cast aluminum: on the one hand, the stamping process has a higher material utilization rate and no defects such as casting porosity and shrinkage cavities, thus improving the yield rate; on the other hand, the structural strength of stamped parts is better than that of die-cast aluminum, and they are less likely to deform or be damaged in the working environment where the brake master cylinder is subjected to high-pressure brake fluid for a long time, thus indirectly reducing the after-sales maintenance cost of the whole vehicle.

[0045] As a further preferred embodiment, an elastic component 5 is provided on the outer side of the P piston 32. The elastic component 5 includes two sets of positioning rings 51 sleeved on the P piston 32 and a spring 52 disposed between the two sets of positioning rings 51. A groove 511 is provided on the positioning ring 51 away from the push rod 31, and an O-ring is embedded in the groove 511.

[0046] Specifically, spring 52 assists piston P in returning to its original position smoothly, absorbing the impact energy during return and reducing the noise from impacts between the piston and other components.

[0047] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A single-chamber mounting plate assembly for a brake master cylinder, characterized in that, include: The mounting plate comprises a mounting plate connecting seat, a P-piston assembly, and mounting screws. The mounting plate has a through-hole for positioning. The mounting plate connecting seat is connected to the mounting plate and has a positioning protrusion on its outer side wall. The positioning protrusion is used for positioning and engaging with the valve block of the brake master cylinder. The P-piston assembly includes a push rod, a P-piston, and a push rod seat. One end of the push rod is riveted to the push rod seat and the other end is connected to the P-piston. The P-piston assembly is integrally disposed through the mounting plate connecting seat. The mounting screws pass through the positioning hole of the mounting plate to fix the entire assembly of the mounting plate, mounting plate connecting seat, and P-piston assembly onto the valve block.

2. A single-chamber mounting plate assembly for a brake master cylinder according to claim 1, characterized in that, There are two positioning holes, which are symmetrically distributed along the length of the mounting plate. There are also two mounting screws corresponding to the positioning holes, and the shank of the mounting screw is adapted to the hole wall of the positioning hole.

3. A single-chamber mounting plate assembly for a brake master cylinder according to claim 1, characterized in that, The mounting plate connector has a positioning boss on the side facing the mounting plate, and the positioning boss is engaged with the positioning hole on the mounting plate for positioning.

4. A single-chamber mounting plate assembly for a brake master cylinder according to claim 1, characterized in that, The push rod and the P piston are connected by ball joint, and the connection between the push rod and the P piston forms a spherical fitting structure. The outer side wall of the P piston is provided with an annular step, and the annular step is limited to the inner side wall of the mounting plate connecting seat.

5. A single-chamber mounting plate assembly for a brake master cylinder according to claim 1, characterized in that, At least two positioning protrusions are provided, and the at least two positioning protrusions are evenly distributed along the circumference of the mounting plate connecting seat. The positioning protrusions are arc-shaped protrusions, and the protrusion height of the positioning protrusions is adapted to the depth of the positioning groove on the valve block.

6. A single-chamber mounting plate assembly for a brake master cylinder according to claim 1, characterized in that, The mounting plate is a metal stamping part, and the mounting plate connecting seat is an injection molded part or a metal forging part. The inner side wall of the mounting plate connecting seat is provided with a clearance hole for avoiding the P piston assembly. The diameter of the clearance hole is adapted to the outer diameter of the P piston.

7. A single-chamber mounting plate assembly for a brake master cylinder according to claim 1, characterized in that, An elastic component is provided on the outer side of the P piston. The elastic component includes two sets of positioning rings sleeved on the P piston and a spring disposed between the two sets of positioning rings. A groove is provided on the positioning ring away from the push rod, and an O-ring is embedded in the groove.

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