Valve body sealing and limiting structure of electronic vacuum booster

Abstract

A valve body sealing and limiting structure of an electronic vacuum booster comprises a valve body and a limiting piece, a first installation groove and a second installation groove which are coaxially arranged are formed in the valve body, a sealing ring is installed in the first installation groove, a plurality of reinforcing rib sets are fixedly arranged on the side wall of the second installation groove at intervals in the circumferential direction of the second installation groove, and the reinforcing rib sets extend in the axial direction of the second installation groove. The limiting piece is installed between the reinforcing rib set and the sealing ring, the limiting piece is supported and limited through the reinforcing rib set, the matching mode of the reinforcing rib set and the limiting piece is simple and stable, strict control over the shape and size precision of the reinforcing rib set and the limiting piece is not needed, the machining difficulty is low, and the limiting capacity of the reinforcing rib set to the limiting piece is higher; and the limiting piece is difficult to fall off and is convenient to install and use.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic vacuum boosters, in particular to a valve body sealing and limiting structure of an electronic vacuum booster. Background Art

[0002] The electronic vacuum booster needs to use the negative pressure generated by the engine intake duct to enhance the braking effect. Therefore, a sealing ring needs to be set in the valve body of the electronic vacuum booster. The presence of the sealing ring ensures the stability of the air pressure inside the booster, prevents external air or impurities from entering the booster, effectively prevents air leakage, and ensures the stability and continuity of the negative pressure.

[0003] The traditional limiting method of the sealing ring is that a full circle of claws is provided on the limiting plate, and the claws are provided with a certain angle. During assembly, the lip sealing ring is first placed in the specified position, and then the limiting plate is placed on top of the sealing ring. An auxiliary tool is used to press down the limiting plate to deform the surrounding claws, and then an interference fit is performed with the valve body. This matching method has very high requirements on the material hardness, toughness and size of the valve body and the limiting plate. Therefore, a valve body limiting structure of a wire-controlled electronic vacuum booster for braking has been developed (publication number CN206297546U). A small hole is opened on the limiting plate, and a hot melt column is added to the valve body. The installation and fixation of the limiting plate are achieved through the cooperation of the small hole and the hot melt column.

[0004] The existing matching method of hot melt column and small hole needs to ensure the effective matching of small hole and hot melt column, otherwise the hot melt column is very easy to fall out of the small hole, resulting in the failure of the limiting piece. This makes the size and shape processing requirements of the small hole and hot melt column strict and the processing difficulty is large. Utility Model Content

[0005] In order to solve the technical problem that in the existing electronic vacuum booster in the above-mentioned background technology, the limit plate cooperates with the hot melt column on the valve body through the small hole, and the processing requirements and difficulty of the small hole and the hot melt column are high, the utility model provides a valve body sealing limit structure of the electronic vacuum booster.

[0006] The technical solution of this utility model is as follows:

[0007] The utility model provides a valve body sealing and limiting structure of an electronic vacuum booster, comprising a valve body and a limiting plate, wherein a first mounting groove and a second mounting groove are coaxially arranged in the valve body, a sealing ring is installed in the first mounting groove, and a plurality of reinforcing rib groups are fixedly provided along the circumferential intervals on the side wall of the second mounting groove, the reinforcing rib group extends along the axial direction of the second mounting groove, the limiting plate is installed between the reinforcing rib group and the sealing ring, the limiting plate is supported and limited by the reinforcing rib group, the matching mode of the reinforcing rib group and the limiting plate is simple and stable, there is no need to strictly control the shape and dimensional accuracy of the reinforcing rib group and the limiting plate, the processing difficulty is low, the reinforcing rib group has a stronger limiting ability for the limiting plate, the limiting plate is difficult to fall off, and the limiting plate is easy to install and use.

[0008] Preferably, the limiting plate includes a limiting body, which is an annular structure, and a plurality of limiting parts are fixedly provided at annular intervals on the outer ring of the limiting body, and avoidance openings are provided between adjacent limiting parts, and the avoidance openings can avoid the reinforcing rib group. The limiting parts can be supported and limited by the reinforcing rib group. The setting of the avoidance openings facilitates the installation of the limiting plate, and the setting of the limiting parts effectively ensures the installation and fixation of the limiting plate.

[0009] Preferably, the limiting portion is a fan-shaped plate structure, and the diameter of the circle enclosed by the limiting portion is the same as the diameter of the second installation groove, ensuring that the limiting piece does not shake after being installed in the second installation groove.

[0010] Preferably, the number of the limiting portions and the avoidance openings is the same as the number of the reinforcing rib groups, so that the limiting portions can be supported and limited by the reinforcing rib groups.

[0011] Preferably, the limiting piece has an arc, and the bending direction of the limiting piece points to the first installation groove, which can provide sufficient clamping force to ensure effective limiting and clamping of the sealing ring.

[0012] Preferably, the diameter of the first mounting groove is smaller than that of the second mounting groove to ensure the contact area between the limiting plate and the sealing ring to provide sufficient supporting capacity.

[0013] Preferably, the reinforcing rib group contains at least one reinforcing rib to expand the contact area with the limiting piece, and the reinforcing rib can improve the overall strength of the second installation groove.

[0014] It can be seen from the above technical solutions that the advantages of the utility model are:

[0015] 1. The reinforcing rib group extends along the axial direction of the second mounting groove. The limiting plate is installed between the reinforcing rib group and the sealing ring. The limiting plate is supported and limited by the reinforcing rib group. The cooperation between the reinforcing rib group and the limiting plate is simple and stable. There is no need to strictly control the shape and dimensional accuracy of the reinforcing rib group and the limiting plate. The processing difficulty is low, and the reinforcing rib group has a stronger limiting ability for the limiting plate. The limiting plate is difficult to fall off, and the limiting plate is easy to install and use.

[0016] 2. A plurality of limiting parts are fixedly provided at annular intervals on the outer ring of the limiting body, and avoidance openings are provided between adjacent limiting parts. The avoidance openings can avoid the reinforcing rib group, and the limiting parts can be supported and limited by the reinforcing rib group. The setting of the avoidance openings facilitates the installation of the limiting pieces, and the setting of the limiting parts effectively ensures the installation and fixation of the limiting pieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic cross-sectional structure diagram of an electronic vacuum booster valve body according to one or more embodiments of the utility model;

[0019] Figure 2 for Figure 1 A schematic diagram of a local enlarged structure at the position of structure A shown;

[0020] Figure 3 for Figure 2 The structure shown is a schematic diagram of a structure without a sealing ring or a limiting piece;

[0021] Figure 4 It is a schematic structural diagram of a limiting piece according to one or more embodiments of the present utility model;

[0022] Figure 5 It is a schematic diagram of the cross-sectional structure of a limiting piece according to one or more embodiments of the present utility model;

[0023] The components represented by the reference numerals in the figure are:

[0024] 1. Sealing ring; 2. Limiting plate; 21. Limiting body; 22. Limiting part; 23. Avoidance; 3. Reinforcing rib group; 4. First installation groove; 5. Second installation groove. DETAILED DESCRIPTION

[0025] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0026] In a typical implementation of the present invention, Figure 1-Figure 5 As shown, a valve body sealing and limiting structure of an electronic vacuum booster is proposed, including: a valve body and a limiting plate 2, a first mounting groove 4 and a second mounting groove 5 are opened in the valve body, the first mounting groove 4 is coaxially arranged and connected with the second mounting groove 5, the diameter of the first mounting groove 4 is smaller than the second mounting groove 5, the sealing ring 1 can be detachably installed in the first mounting groove 4, and the limiting plate 2 can be detachably installed in the second mounting groove 5 close to the side of the first mounting groove 4, so as to limit the sealing ring 1.

[0027] In this embodiment, the sealing ring 1 is a lip-shaped sealing ring. It can be understood that in other embodiments, the sealing ring 1 can also be a Y-shaped, X-shaped or other structure. The specific structure can be selected according to actual needs and no excessive restrictions are made here.

[0028] A plurality of reinforcing rib groups 3 are fixedly provided on the side wall of the second mounting groove 5 at intervals along the circumferential direction thereof. Each reinforcing rib group 3 contains at least one reinforcing rib. The reinforcing ribs extend along the axial direction of the second mounting groove 5 . The length of the reinforcing ribs is less than the axial length of the second mounting groove 5 .

[0029] Specific as Figure 3 As shown, the reinforcing rib extends axially along the second mounting groove 5, and a gap of a set thickness is provided between one end of the reinforcing rib and the adjacent first mounting groove 4 for installation of the limiting plate 2, and the thickness of the limiting plate 2 is the same as the thickness of the gap.

[0030] like Figure 4-Figure 5 As shown, the limiting plate 2 includes a limiting body 21 and a limiting portion 22, wherein the limiting body 21 is an annular structure for supporting and limiting the sealing ring 1, and a plurality of limiting portions 22 are provided, and the plurality of limiting portions 22 are fixedly arranged on the outer ring of the limiting body 21 at annular intervals, and avoidance openings 23 are provided between adjacent limiting portions 22 for avoiding the reinforcing rib group, thereby facilitating the installation of the limiting plate 2.

[0031] The limiting portion 22 is a fan-shaped plate structure, and the diameter of the circle enclosed by the limiting portion 22 is the same as the diameter of the second mounting groove 5, thereby ensuring that the limiting plate 2 does not shake after being installed in the second mounting groove 5. The limiting plate 2 is used to contact the reinforcing rib group 3, thereby achieving the limitation of the position of the limiting plate 2 under the support of the reinforcing rib group 3, thereby improving the installation stability of the limiting plate 2.

[0032] The number of the limiting parts 22 and the avoidance openings 23 is the same as the number of the reinforcing rib groups 3 . The limiting parts 22 correspond to the reinforcing rib groups 3 one by one, and the reinforcing rib groups 3 can be used to support and limit the limiting parts 22 .

[0033] The limiting piece 2 has an arc, and the bending direction of the limiting piece 2 points to the first installation groove 4, so as to provide sufficient pressing force to ensure effective limiting and pressing of the sealing ring 1.

[0034] The specific working principle is:

[0035] First, place the sealing ring 1 into the first installation groove 4, and then place the limiting plate 2 into the second installation groove 5. During the placement of the limiting plate 2, align the avoidance opening 23 with the reinforcing rib group 3, and then push the limiting plate 2 into the second installation groove 5. When the limiting plate 2 moves to the gap between the reinforcing rib group 3 and the first installation groove 4, rotate the limiting plate 2 around the axis so that the limiting portion 22 is aligned with the reinforcing rib group 3, so that the reinforcing rib group 3 is used to press and limit the limiting plate 2, and then the reinforcing rib group 3 is used to press the sealing ring 1 to complete the assembly.

[0036] The coordination between the reinforcing rib group 3 and the limiting plate 2 is simple and stable. There is no need to strictly control the shape and dimensional accuracy of the reinforcing rib group 3 and the limiting plate 2. The processing difficulty is low, and the reinforcing rib group 3 has a stronger limiting ability on the limiting plate 2. The limiting plate 2 is difficult to fall off, and the limiting plate 2 is easy to install and use.

[0037] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A valve body sealing and limiting structure of an electronic vacuum booster, comprising: A valve body and a limit plate (2), characterized in that a first mounting groove (4) and a second mounting groove (5) are coaxially arranged in the valve body, a sealing ring (1) is installed in the first mounting groove (4), a plurality of reinforcing rib groups (3) are fixedly arranged on the side wall of the second mounting groove (5) at intervals along the annular direction thereof, the reinforcing rib group (3) extends axially along the second mounting groove (5), and the limit plate (2) is installed between the reinforcing rib group (3) and the sealing ring (1).

2. The valve body sealing and limiting structure of an electronic vacuum booster according to claim 1, characterized in that: The limiting plate (2) comprises a limiting body (21), which is an annular structure. A plurality of limiting portions (22) are fixedly provided at intervals along the outer ring of the limiting body (21), and avoidance openings (23) are provided between adjacent limiting portions (22).

3. The valve body sealing and limiting structure of an electronic vacuum booster according to claim 2, characterized in that: The limiting portion (22) is a fan-shaped plate structure, and the diameter of the circle enclosed by the limiting portion (22) is the same as the diameter of the second installation groove (5).

4. The valve body sealing and limiting structure of an electronic vacuum booster according to claim 2, characterized in that: The number of the limiting portions (22) and the avoidance openings (23) is the same as the number of the reinforcing rib groups (3).

5. The valve body sealing and limiting structure of an electronic vacuum booster according to claim 1, characterized in that: The limiting piece (2) has an arc, and the bending direction of the limiting piece (2) points to the first installation groove (4).

6. The valve body sealing and limiting structure of an electronic vacuum booster according to claim 1, characterized in that: The diameter of the first installation groove (4) is smaller than that of the second installation groove (5).

7. The valve body sealing and limiting structure of an electronic vacuum booster according to claim 1, characterized in that: The reinforcing rib group (3) contains at least one reinforcing rib.

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