Reinforced spring brake chamber and automobile

Abstract

The utility model relates to the technical field of automobile spring brake chambers, in particular to a reinforced spring brake chamber and an automobile. A reinforced spring brake chamber comprises a cylinder body and a front end cover, the cylinder body comprises a first annular wall body and a second annular wall body which are coaxially arranged, and the second annular wall body is used for being assembled and connected with the front end cover; in the radial direction of the cylinder body, the wall body thickness of the second annular wall body is larger than the wall body thickness of the first annular wall body, and the wall body thickness of the second annular wall body is configured to be a preset thickness. According to the utility model, by increasing the thickness of the wall body of the second annular wall body, the thickness of the wall body of the part of the cylinder body at the joint of the front end cover and the cylinder body is increased, and the stress strength of the part of the cylinder body at the joint of the front end cover and the cylinder body is further increased, so that the technical problems existing in the prior art are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of spring brake chamber for vehicle, especially to a reinforced spring brake chamber and automobile. BACKGROUND

[0002] In the prior art, the spring brake chamber is installed on the vehicle and used to generate braking force for braking the vehicle; for example, a self-sealing diaphragm overall riveting and pressing type spring brake chamber disclosed in patent document CN110094443A.

[0003] Through long-time observation and testing, the technical personnel found that generally the front end cover of the spring brake chamber is installed on the vehicle through fasteners, and when the spring brake chamber generates braking force, the push disc assembly extends outward to give braking force to the brake disc, and in this process, the brake disc also gives reaction force to the push disc assembly, which is transmitted to the junction of the front end cover and the cylinder body, and the strength of part of the cylinder body at the junction is not enough, causing deformation of part of the cylinder body at the junction, and even fracture.

[0004] Therefore, the technical problem existing in the prior art is how to increase the stress strength of part of the cylinder body at the junction of the front end cover and the cylinder body. CONTENT OF THE UTILITY MODEL

[0005] In view of the technical problem of how to increase the stress strength of part of the cylinder body at the junction of the front end cover and the cylinder body in the prior art, the utility model provides a reinforced spring brake chamber and automobile.

[0006] The utility model realizes the following technical scheme:

[0007] A reinforced spring brake chamber, characterized in that it comprises a cylinder body and a front end cover,

[0008] The cylinder body comprises a first annular wall body and a second annular wall body arranged coaxially, wherein the second annular wall body is used to assemble and connect with the front end cover;

[0009] Along the radial direction of the cylinder body, the wall thickness of the second annular wall body is greater than that of the first annular wall body, and the wall thickness of the second annular wall body is configured to be a preset thickness.

[0010] Further, the second annular wall body and the front end cover are connected in a riveting manner;

[0011] The inner wall diameter of the second annular wall body is greater than that of the first annular wall body.

[0012] The cylinder body further comprises an annular stepped portion, the first annular wall body and the second annular wall body are connected through the annular stepped portion, and at least part of the annular stepped portion extends along the radial direction of the cylinder body.

[0013] Further, the front end cover is provided with a through hole at the end away from the cylinder body, and the wide head bolt has a head portion which is inseparable from the space enclosed by the front end cover and the cylinder body, and a rod portion which passes through the through hole and is limited outside the combination of the front end cover and the cylinder body.

[0014] The head portion of the wide head bolt comprises a connecting portion, a first narrow portion and a second narrow portion, and the minimum thickness of the first narrow portion and the minimum thickness of the second narrow portion are smaller than the minimum thickness of the connecting portion along the axial direction of the wide head bolt.

[0015] The connecting portion, the first narrow portion and the second narrow portion are welded to the inner wall of the front end cover.

[0016] Further, the utility model also provides a reinforced spring brake chamber for an automobile.

[0017] Compared with the prior art, the utility model has the advantages that:

[0018] 1、In the utility model, the part of the cylinder body at the joint of the front end cover and the cylinder body is the second annular wall body, the wall thickness of the second annular wall body is greater than that of the first annular wall body, and the wall thickness of the second annular wall body is configured as a preset thickness, wherein the preset thickness can be configured or adjusted according to the specific situation, which is not limited herein; when the wall thickness of the first annular wall body is consistent with that of the cylinder body in the prior art, the wall thickness of the second annular wall body of the utility model is greater than that of the part of the cylinder body at the joint of the front end cover and the cylinder body in the prior art; the utility model increases the wall thickness of the part of the cylinder body at the joint of the front end cover and the cylinder body by increasing the wall thickness of the second annular wall body, thereby increasing the stress intensity of the part of the cylinder body at the joint of the front end cover and the cylinder body, and thus the utility model solves the technical problems in the prior art.

[0019] 2. The utility model discloses a ring step part, at least one part of the ring step part extends along the radial direction of the cylinder, in the process of the rivet pressing, the tool block is used, and the part of the ring step part that extends along the radial direction of the cylinder is pressed in the second direction, wherein the second direction is opposite to the first direction, the tool block is fixed, and then the tool block gives the second ring wall body with the equal and opposite reaction force F' of the direction of the rivet pressing force F through the ring step part, that is, the setting of the ring step part is to give the tool block a supporting surface, and the rivet pressing force F is cancelled through the tool block low step in the ring step part to avoid the axial deformation of the second ring wall body in the rivet pressing process. Therefore, the utility model also solves the technical problem of how to avoid the axial deformation of the second ring wall body in the rivet pressing process.

[0020] 3. The minimum thickness of the first narrowing part and the minimum thickness of the second narrowing part are both smaller than the head thickness of the wide head bolt in the prior art; this leads to the minimum height of the gap between the head of the wide head bolt and the inner wall of the front end cover in the welding process of the wide head bolt and the front end cover of the utility model being equal to the length of the minimum thickness of the first narrowing part or the length of the minimum thickness of the second narrowing part, that is, the minimum height of the gap between the head of the wide head bolt and the inner wall of the front end cover in the utility model is smaller than in the prior art, and the welding rod only needs to heat the gap for a short time, for example, about 1s, and the molten solder is enough to fill the gap with the minimum height between the head of the wide head bolt and the inner wall of the front end cover, so that the utility model is shorter in the heating time of the welding rod in the welding process of the head of the wide head bolt and the inner wall of the front end cover compared with the prior art, and effectively avoids the overburning phenomenon of the head of the wide head bolt. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the structural section view schematic diagram of example 1;

[0022] Figure 2 It is Figure 1 It is the enlarged schematic diagram of area A in the middle;

[0023] Figure 3 It is the welding schematic diagram of the wide head bolt and the front end cover in the prior art;

[0024] Figure 4 It is the welding schematic diagram of the wide head bolt and the front end cover in example 1;

[0025] Figure 5 It is the schematic diagram of the wide head bolt and the front end cover in example 1.

[0026] The markings in the figure are: cylinder body (1), first annular wall (101), second annular wall (102), annular step (103), front end cover (2), through hole (6), wide head bolt (7), connecting part (701), first narrowing part (702), and second narrowing part (703). Detailed Implementation

[0027] The following detailed, non-limiting description of the utility model's technical solution, in conjunction with preferred embodiments and accompanying drawings, is provided. In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0028] Example 1

[0029] like Figures 1-2 As shown, this embodiment proposes a reinforced spring brake chamber, which includes a cylinder body 1 and a front end cover 2. The cylinder body 1 includes a first annular wall 101 and a second annular wall 102 arranged coaxially. The second annular wall 102 is used to assemble and connect with the front end cover 2. Along the radial direction of the cylinder body 1, the wall thickness of the second annular wall 102 is greater than the wall thickness of the first annular wall 101, and the wall thickness of the second annular wall 102 is configured to a preset thickness.

[0030] In the prior art, spring brake chambers are installed on vehicles to generate braking force for the vehicle; for example, a self-sealing diaphragm integral riveted spring brake chamber is disclosed in patent document CN110094443A.

[0031] Through long observation and testing, the technical personnel found that the front end cover of the spring brake chamber is usually installed on the vehicle through fasteners, and when the spring brake chamber generates braking force, the push disc assembly extends outward to give the brake disc braking force. In this process, the brake disc also gives the push disc assembly a reaction force, which is transmitted to the junction between the front end cover and the cylinder body. The strength of the part of the cylinder body at this junction is not enough, causing the part of the cylinder body at this junction to deform frequently, and even break.

[0032] Therefore, the technical problem existing in the prior art is how to increase the stress strength of the part of the cylinder body at the junction of the front end cover and the cylinder body.

[0033] In the embodiment, the part of the cylinder body at the junction of the front end cover and the cylinder body is the second annular wall body 102 proposed in the embodiment. In order to increase the stress strength of the second annular wall body 102, the wall thickness of the second annular wall body 102 is greater than the wall thickness of the first annular wall body 101, and the wall thickness of the second annular wall body 102 is configured as a preset thickness, which can be configured or adjusted according to specific conditions without limitation. In the case where the wall thickness of the first annular wall body 101 is consistent with the wall thickness of the cylinder body in the prior art, the wall thickness of the second annular wall body 102 in the embodiment is greater than the wall thickness of the part of the cylinder body at the junction of the front end cover and the cylinder body in the prior art. The embodiment increases the wall thickness of the part of the cylinder body at the junction of the front end cover and the cylinder body by increasing the wall thickness of the second annular wall body 102, thereby increasing the stress strength of the part of the cylinder body at the junction of the front end cover and the cylinder body. Therefore, the embodiment solves the technical problem existing in the prior art.

[0034] Further, the second annular wall body 102 is used to assemble and connect with the front end cover 2 as mentioned above. Specifically, the second annular wall body 102 and the front end cover 2 are connected by pressure riveting. This pressure riveting method is also described in the prior art CN110094443A, which will not be repeated here.

[0035] As Figure 2As shown, according to the description in CN110094443A, the press riveting process is applied to the present embodiment, and it is known that during the press riveting process, a step needs to use a press riveting tool to give an action force F to the second annular wall body 102 along the first direction, so that the edge of the second annular wall body 102 is deformed and wrapped around the edge of the front end cover 2, and then the riveting is formed; the first direction is the axial direction from the front end cover 2 to the first annular wall body 101, and during this process, the action force F always acts on the second annular wall body 102, so that the second annular wall body 102 is axially stressed for a long time, and the riveting action force F is usually large, which can cause the second annular wall body 102 to easily deform axially along the first direction. Therefore, how to avoid the axial deformation of the second annular wall body 102 during the riveting process is a technical problem to be solved.

[0036] The present embodiment also includes the following technical solutions: the inner wall diameter of the second annular wall body 102 is greater than the inner wall diameter of the first annular wall body 101; the cylinder body 1 further includes an annular stepped portion 103, the first annular wall body 101 and the second annular wall body 102 are connected through the annular stepped portion 103, and at least a part of the annular stepped portion 103 extends along the radial direction of the cylinder body 1.

[0037] The present embodiment proposes the annular stepped portion 103, at least a part of the annular stepped portion 103 extends along the radial direction of the cylinder body 1, and during the press riveting process, a tool block is used to resist the part of the annular stepped portion 103 extending along the radial direction of the cylinder body 1 along the second direction opposite to the first direction. The tool block is fixed, and then the tool block gives the second annular wall body 102 an equal and opposite action force F' to the direction of the press riveting action force F, that is, the annular stepped portion 103 is provided to give the tool block a supporting surface, and the tool block is used to offset the press riveting action force F through the annular stepped portion 103, so as to avoid the axial deformation of the second annular wall body 102 during the riveting process. Therefore, the present embodiment also solves the technical problem of how to avoid the axial deformation of the second annular wall body 102 during the riveting process.

[0038] Further, the embodiment further comprises the following technical scheme: the front end cover 2 is provided with a through hole 6 at one end away from the cylinder body 1, and a wide head bolt 7, the head of the wide head bolt 7 is inseparable from being limited in the space surrounded by the front end cover 2 and the cylinder body 1, the rod of the wide head bolt 7 passes through the through hole 6 and is limited outside the combination of the front end cover 2 and the cylinder body 1; the head of the wide head bolt 7 comprises a connecting portion 701, a first narrow portion 702 and a second narrow portion 703, along the axial direction of the wide head bolt 7, the minimum thickness of the first narrow portion 702 and the minimum thickness of the second narrow portion 703 are respectively smaller than the minimum thickness of the connecting portion 701, the connecting portion 701 is located between the first narrow portion 702 and the second narrow portion 703 and is connected with the first narrow portion 702 and the second narrow portion 703 respectively; the connecting portion 701, the first narrow portion 702 and the second narrow portion 703 are respectively welded with the inner wall of the front end cover 2.

[0039] As Figure 3 shown, it is a structure schematic diagram of the prior art of the wide head bolt and the front end cover welding, in the prior art, the head of the wide head bolt is square, along the axial direction of the wide head bolt, the thickness of each part of the head is consistent, in the welding process of the head of the wide head bolt and the inner wall of the front end cover, the height of the gap between the head of the wide head bolt and the inner wall of the front end cover is equal to the thickness of the head of the wide head bolt, and usually the gap is very narrow, the welding rod cannot be inserted into the gap, only the welding rod can be heated at the upper opening of the gap, the melted welding rod flows into the gap and gradually fills the gap to complete the welding, this process usually lasts for 3-5s or even longer, which causes the part of the head of the wide head bolt in contact with the welding rod to be continuously subjected to high temperature, and this part will be overburned, causing the part to be damaged.

[0040] As Figure 4 , Figure 5 shown, in the embodiment, the head of the wide head bolt 7 comprises the connecting portion 701, the first narrow portion 702 and the second narrow portion 703 connected with each other, along the axial direction of the wide head bolt 7, the minimum thickness of the first narrow portion 702 and the minimum thickness of the second narrow portion 703 are respectively smaller than the minimum thickness of the connecting portion 701; in the embodiment, preferably, the minimum thickness of the first narrow portion 702 is equal to the minimum thickness of the second narrow portion 703.

[0041] In the thickness of the connecting portion 701, equal to the thickness of the head of the wide head bolt in the prior art, the minimum thickness of the first narrowed portion 702 and the minimum thickness of the second narrowed portion 703 are both smaller than the thickness of the head of the wide head bolt in the prior art; this results in that, in the process of welding the wide head bolt 7 and the front end cover 2 using the embodiment, the minimum height of the gap between the head of the wide head bolt 7 and the inner wall of the front end cover 2 is equal to the length of the minimum thickness of the first narrowed portion 702 or the length of the minimum thickness of the second narrowed portion 703, that is, in the embodiment, the minimum height of the gap between the head of the wide head bolt 7 and the inner wall of the front end cover 2 is smaller than that in the prior art, and when the welding rod is welded, the welding rod only needs to heat the gap for a short time, for example, about 1s, and the molten solder is enough to fill the gap with the minimum height between the head of the wide head bolt 7 and the inner wall of the front end cover 2, so compared with the prior art, the embodiment shortens the heating time of the welding rod in the process of welding the head of the wide head bolt 7 and the inner wall of the front end cover 2, and effectively avoids the phenomenon of overburning of the head of the wide head bolt.

[0042] Further, since the minimum height of the gap between the head of the wide head bolt 7 and the inner wall of the front end cover 2 in the embodiment is smaller than that in the prior art, the occurrence of the virtual welding condition can also be avoided.

[0043] Embodiment 2

[0044] The embodiment provides an automobile, which comprises the reinforced spring brake chamber mentioned in embodiment 1.

[0045] The above embodiments only express several implementation manners of the utility model, and the description is more specific and detailed, but it cannot be understood as the limitation of the patent range of the utility model. It should be pointed out that, for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which all belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A reinforced spring brake chamber characterized in that, The cylinder (1) and the front end cover (2), The cylinder (1) comprises a first annular wall body (101) and a second annular wall body (102) coaxially arranged, wherein the second annular wall body (102) is used for assembling and connecting with the front end cover (2); Along the radial direction of the cylinder (1), the wall thickness of the second annular wall body (102) is greater than the wall thickness of the first annular wall body (101), and the wall thickness of the second annular wall body (102) is configured to a preset thickness.

2. The reinforced spring brake chamber of claim 1, wherein, The second annular wall body (102) and the front end cover (2) are connected by pressure riveting; The inner wall diameter of the second annular wall body (102) is greater than the inner wall diameter of the first annular wall body (101); The cylinder (1) further comprises an annular stepped portion (103), the first annular wall body (101) and the second annular wall body (102) are connected through the annular stepped portion (103), and at least a part of the annular stepped portion (103) extends along the radial direction of the cylinder (1).

3. The reinforced spring brake chamber according to claim 1 or 2, characterized in that The front end cover (2) is provided with a through hole (6) at one end away from the cylinder (1), and further comprises a wide head bolt (7), the head of the wide head bolt (7) is inseparably limited in the space enclosed by the front end cover (2) and the cylinder (1), the rod of the wide head bolt (7) passes through the through hole (6) and is limited outside the combination of the front end cover (2) and the cylinder (1); The head of the wide head bolt (7) comprises a connecting portion (701), a first narrowing portion (702) and a second narrowing portion (703), along the axial direction of the wide head bolt (7), the minimum thickness of the first narrowing portion (702) and the minimum thickness of the second narrowing portion (703) are respectively less than the minimum thickness of the connecting portion (701), the connecting portion (701) is located between the first narrowing portion (702) and the second narrowing portion (703) and is connected with the first narrowing portion (702) and the second narrowing portion (703) respectively; The connecting portion (701), the first narrowing portion (702) and the second narrowing portion (703) are respectively welded with the inner wall of the front end cover (2).

4. An automobile characterized by comprising: The reinforced spring brake chamber comprises the reinforced spring brake chamber according to any one of claims 1-3. The reinforced spring brake chamber comprises the reinforced spring brake chamber according to any one of claims 1-3.

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