Rear plate spring support

Abstract

The utility model discloses a rear plate spring support which comprises a base and a wrapping shell arranged on the base, a plurality of support installation bosses are arranged on the base, a plurality of reinforcing ribs are arranged on the surface of the wrapping shell, and a pin shaft hole is formed in the lower portion of the wrapping shell. The base comprises a first plate component and a second plate component; the first plate component is positioned above the wrapping shell and is connected with the bracket mounting boss; the second plate component is positioned below the wrapping shell; the second plate component is bent towards the direction of the pin shaft hole from top to bottom, and a plate spring pin mounting boss coaxial with the pin shaft hole is arranged below the second plate component; the bottom of the second plate component is provided with a notch used for installing a plate spring pin installing boss. According to the utility model, the traditional structure that the base is fully wrapped by a boss is replaced by bending half-surrounded connection, and meanwhile, the cavity reinforcing ribs which transversely penetrate through the inner and outer pin shaft mounting bosses are additionally arranged in the wrapping shell, so that the strength is ensured while a redundant structure is removed.

Description

Technical Field

[0001] The utility model relates to a rear leaf spring bracket and belongs to the technical field of light truck parts. Background Art

[0002] Leaf spring brackets, as the fixing and force transmission medium of leaf springs, play an important role in leaf spring suspension systems. In the past, it was normal for light trucks to run overloaded. Leaf spring brackets, as key components that affect the driving safety of the entire vehicle, are often made larger in size and weight, which leads to unsatisfactory curb weight of the entire vehicle. However, with the increasingly stringent regulations on road freight transportation, the conditions of overload operation are gradually disappearing, the market is eager for lightweight vehicles, and the use of vehicles is also becoming more diversified. The entire vehicle must reduce weight while ensuring its load-bearing capacity, which places higher demands on chassis design and the design of truck suspension systems, especially those that widely use leaf springs.

[0003] The leaf spring bracket breaks mostly because of local stress concentration near the reinforcement ribs, high tensile stress level, low safety factor, and local design redundancy on the bracket, which makes the bracket heavy. The simplest and most effective way to lightweight the leaf spring bracket is to reduce the thickness and volume, while reducing the number of reinforcement ribs and fixing holes. However, doing so will increase the overall stress level of the bracket, and the local stress (at the reinforcement ribs) will be too concentrated, resulting in a reduced safety factor, a shortened fatigue life, and an increased risk of cracking in the later stage.

[0004] Chinese utility model patent CN209833283U discloses a novel rear leaf spring front bracket, which includes a base and a housing body, a plurality of mounting holes are arranged along the edge of the front side of the base, and the edges between the mounting holes are concave arc transitions, a boss is arranged on the front side of the base, a plurality of internal reinforcing ribs are arranged between the front side of the base and the outer surface of the boss, the inner end of the housing body is connected with the front side of the base as an integrated structure, the boss is located in the cavity of the housing body, the base, the top surface of the boss, and the outer end surface of the housing body are all provided with coaxial pin holes, a plurality of external reinforcing ribs are arranged between the front side of the base and the outer surface of the housing body, the external reinforcing ribs are distributed in a circle with the pin hole as the center, a root boss is added at the root of the external reinforcing rib where stress is concentrated, the connection between the external reinforcing rib and the root boss is an arc transition, and a plurality of weight-reducing holes are arranged on the surface of the housing body. The boss arranged on the base and the root boss arranged at the root of the reinforcing rib both increase the overall weight of the leaf spring bracket, and there is still a large part of redundant structure under the base, which increases the overall structural strength but increases the overall weight of the leaf spring bracket. Utility Model Content

[0005] The utility model aims to provide a rear leaf spring bracket to solve the technical problems of redundant structure and heavy weight of the existing rear leaf spring front bracket.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A rear leaf spring bracket comprises a base and a housing body arranged on the base, the base is provided with a plurality of bracket mounting bosses, and a pin shaft hole is arranged below the housing body. The base comprises a first plate component located above the housing body and connected to the bracket mounting bosses, and a second plate component located below the housing body; the second plate component is bent from top to bottom toward the pin shaft hole, and a leaf spring pin mounting boss is arranged coaxially with the pin shaft hole below the second plate component; a notch is provided at the bottom of the second plate component for mounting the leaf spring pin mounting boss.

[0008] Therefore, since the rear leaf spring bracket is subjected to large tensile stress at the connection between the leaf spring pin mounting boss and the base during use, the present rear leaf spring bracket changes the structure of the base to eliminate the structure in the prior art that the base fully wraps the leaf spring pin mounting boss. The leaf spring pin mounting boss is connected to the base through the notch below the second plate component, and the base semi-encloses the leaf spring pin mounting boss; the second plate component below the base is in an inwardly bent shape, which removes the redundant structure while ensuring the strength of the connection between the leaf spring pin mounting boss and the base.

[0009] According to the embodiments of the present invention, the present invention can be further optimized. The following is the technical solution formed after optimization:

[0010] In order to avoid stress concentration at the reinforcement rib position of the base, specifically, the surface of the enclosure shell is provided with end reinforcement ribs located at the port of the enclosure shell and top reinforcement ribs arranged on the upper surface of the enclosure shell; the top reinforcement rib extends from one end of the enclosure shell to the base, and an eight-shaped reinforcement rib is arranged at the root of the top reinforcement rib located at the base.

[0011] In a specific embodiment, the figure-eight reinforcing rib includes two ribs symmetrically arranged on both sides of the top reinforcing rib; the opening of the figure-eight reinforcing rib faces the bracket mounting boss.

[0012] In order to make the overall structure of the bracket more concise and remove redundant structures, in a specific embodiment, the bottom surface of the enclosure shell and the base are both in the shape of a fan that is wide at the top and narrow at the bottom.

[0013] In order to strengthen the strength between the mounting seat and the leaf spring pin mounting boss, in a specific embodiment, a cavity reinforcement rib is arranged between the leaf spring pin mounting boss and the second plate component; the cavity reinforcement rib is arranged on the inner side of the cavity of the package shell and in the middle of the second plate component, and the cavity reinforcement rib extends upward from the spring pin mounting boss to the inner top wall of the package shell along the height direction of the second plate component.

[0014] In a specific embodiment, two of the bracket mounting bosses are symmetrically arranged on both sides of the axis of the pin shaft hole in a group; each of the bracket mounting bosses is connected by an arc transition section.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The rear leaf spring bracket of the utility model adopts a symmetrically evenly distributed 4-point installation structure, and the connection between the installation and fixing bosses adopts a concave smooth arc transition, which removes redundant materials in the low stress area of ​​the base; the traditional base fully wrapped boss structure is cancelled and replaced with a bent semi-enclosed connection, and at the same time, cavity reinforcement ribs that cross the inner and outer pin shaft installation bosses are added inside the shell body to ensure strength while removing redundant structure; the fan-shaped shell body structure increases the movement space of the leaf spring ear, and the folded edge reinforcement ribs at both ends of the shell body and the high triangular reinforcement ribs in the middle are arranged, which greatly enhances the bending resistance of the bracket; the traditional straight reinforcement rib structure in the middle is cancelled and replaced with an eight-shaped oblique rib structure at the end, which reduces the local stress concentration on the reinforcement ribs and improves the fatigue life of the bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an isometric structural schematic diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the structure of the utility model;

[0019] Figure 3 yes Figure 2 Middle AA section view;

[0020] Figure 4 It is a top view of the utility model.

[0021] In the figure

[0022] 1-base; 11-first plate component; 12-second plate component; 13-notch; 101-arc transition section; 102-bracket mounting boss; 103-leaf spring pin mounting boss; 2-top reinforcement rib; 21-figure eight reinforcement rib; 3-shell body; 4-end reinforcement rib; 5-pin shaft hole; 6-cavity reinforcement rib. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following text, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0024] like Figure 1-Figure 4As shown, the rear leaf spring bracket of the present embodiment comprises a base 1 and a shell body 3 arranged on the base, the bottom surface of the shell body 3 and the base 1 are both in the shape of a fan that is wide at the top and narrow at the bottom; a pin shaft hole 5 is arranged at the bottom of the shell body 1; four bracket mounting bosses 102 are arranged on the base 1, and the bracket mounting bosses 102 are symmetrically arranged on both sides of the axis of the pin shaft hole 5 in a group of two; each of the bracket mounting bosses 102 is connected by an arc transition section 101.

[0025] A plurality of reinforcing ribs are arranged on the surface of the enclosure shell 3, and the reinforcing ribs on the surface of the enclosure shell 3 include end reinforcing ribs 4 arranged at the port of the enclosure shell 3 and top reinforcing ribs 2 arranged on the upper surface of the enclosure shell 3; the top reinforcing rib 2 extends from one end of the enclosure shell 3 to the base 1, and an eight-shaped reinforcing rib 21 is arranged at the root of the top reinforcing rib 2 located at the base 1; the eight-shaped reinforcing rib 21 includes two ribs symmetrically arranged on both sides of the top reinforcing rib 2; the opening of the eight-shaped reinforcing rib 21 faces the bracket mounting boss 102.

[0026] Compared with the rib reinforcement boss or straight rib in the prior art, the eight-shaped rib 21 of this embodiment improves the strength of the structure while avoiding stress concentration at the root of the rib, and at the same time reduces the overall weight to achieve lightweight support.

[0027] The base 1 includes a first plate component 11 located above the housing 3 and connected to the bracket mounting boss 102, and a second plate component 12 located below the housing; the second plate component 12 is bent from top to bottom toward the pin shaft hole 5, and a leaf spring pin mounting boss 103 is coaxially arranged below the second plate component 12 and the pin shaft hole 5; a notch 13 for mounting the leaf spring pin mounting boss 103 is provided at the bottom of the second plate component 12. Through the bending structure, the ability of the connection between the leaf spring pin mounting boss 103 and the base 1 of the rear leaf spring bracket to withstand tensile stress is improved during use, while reducing the overall weight and increasing the structural strength. The traditional fully wrapped boss structure of the base 1 is cancelled and replaced with a bent semi-enclosed connection. At the same time, a cavity reinforcement rib 6 is added inside the enclosure body 3 to cross the inner and outer pin shaft mounting bosses, thereby removing redundant structures while ensuring strength. The fan-shaped enclosure body 3 structure increases the movement space of the leaf spring lug, and the folded edge reinforcement ribs at both ends of the enclosure body and the high triangular reinforcement ribs in the middle are arranged, which greatly enhances the bending resistance of the bracket. The traditional straight reinforcement rib structure in the middle is cancelled and replaced with an eight-shaped oblique rib structure at the end, which reduces the local stress concentration on the reinforcement ribs and improves the fatigue life of the bracket.

[0028] A cavity reinforcement rib 6 is arranged between the leaf spring pin mounting boss 103 and the second plate component 12. The cavity reinforcement rib 6 is arranged on the inner side of the cavity of the enclosure body 3 and in the middle of the second plate component 12. The cavity reinforcement rib 6 extends upward from the spring pin mounting boss 103 to the inner top wall of the enclosure body 3 along the height direction of the second plate component 12.

[0029] The rear leaf spring bracket of this embodiment starts from three aspects: reducing the number of fixing points of the leaf spring bracket, increasing the bending structure of the part with greater tensile stress and optimizing the reinforcing rib structure, so as to achieve the purpose of avoiding stress concentration in the rear leaf spring bracket and reducing the overall weight of the rear leaf spring bracket.

[0030] 1. The redundant installation holes of the base are cancelled, and the arrangement relationship between the holes is adjusted. The traditional 7-point / 6-point / 5-point fixing method is changed to 4-point fixing. The edges between the installation holes are concave arc transitions, and the installation fixing points are all thickened boss structures; 2. The tensile stress at the connection between the leaf spring pin fixing boss and the base is large, and the traditional base full-wrapped boss structure is cancelled, and it is changed to a bending overlap, removing the redundant structure while ensuring strength; 3. The large arc shell structure increases the movement space of the leaf spring ear, and at the same time, through the entire reinforcing rib that crosses the inner and outer leaf spring pin fixing bosses, the flanging ribs are added at the ends, and two oblique ribs are symmetrically distributed along the installation fixing points in the middle. In addition, the external reinforcing ribs all start from the bracket installation point boss, which improves the bending resistance of the cantilever structure of the cavity; 4. The traditional straight reinforcing rib structure in the middle is cancelled and replaced with an eight-shaped oblique rib structure at the end, which reduces the situation of local stress concentration on the reinforcing ribs.

[0031] The above technical solution is further limited in that the multiple mounting holes on the base are all symmetrical structures with the leaf spring pin hole as the symmetry center, ensuring that the overall force of the bracket is uniform. The ductile iron casting material used in this bracket can be adjusted to cast steel material to further improve the overall performance; the low stress area at the top of the cavity can open a weight-reducing hole to further reduce the overall weight.

[0032] The contents explained in the above embodiments should be understood as these embodiments are only used to more clearly illustrate the present invention, and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art fall within the scope defined by the claims attached to this application.

Claims

1. A rear leaf spring bracket, comprising a base (1) and a housing (3) arranged on the base, the base (1) being provided with a plurality of bracket mounting bosses (102), a pin hole (5) being provided below the housing (3), characterized in that: The base (1) comprises a first plate component (11) located above the housing (3) and connected to the bracket mounting boss (102), and a second plate component (12) located below the housing; the second plate component (12) is bent from top to bottom in the direction of the pin shaft hole (5), and a leaf spring pin mounting boss (103) is provided coaxially with the pin shaft hole (5) below the second plate component (12); and a notch (13) for mounting the leaf spring pin mounting boss (103) is provided at the bottom of the second plate component (12).

2. The rear leaf spring bracket according to claim 1, characterized in that: The upper surface of the enclosure shell (3) is provided with an end reinforcement rib (4) located at the end of the enclosure shell (3) and a top reinforcement rib (2) provided on the upper surface of the enclosure shell (3); the top reinforcement rib (2) extends from one end of the enclosure shell (3) to the base (1), and an eight-shaped reinforcement rib (21) is provided at the root of the top reinforcement rib (2) located at the base (1).

3. The rear leaf spring bracket according to claim 2, characterized in that: The figure-eight reinforcing rib (21) comprises two ribs symmetrically arranged on both sides of the top reinforcing rib (2); the opening of the figure-eight reinforcing rib (21) faces the bracket mounting boss (102).

4. The rear leaf spring bracket according to claim 1, characterized in that: A cavity reinforcement rib (6) is provided between the leaf spring pin mounting boss (103) and the second plate component (12).

5. The rear leaf spring bracket according to claim 4, characterized in that: The cavity reinforcement rib (6) is arranged inside the cavity of the enclosure shell (3) and in the middle of the second plate component (12), and the cavity reinforcement rib (6) extends upward along the height direction of the second plate component (12) from the spring pin mounting boss (103) to the inner top wall of the enclosure shell (3).

6. The rear leaf spring bracket according to any one of claims 1 to 5, characterized in that: The bottom surface of the enclosure body (3) and the base (1) are both in the shape of a fan that is wide at the top and narrow at the bottom.

7. The rear leaf spring bracket according to any one of claims 1 to 5, characterized in that: The bracket mounting bosses (102) are arranged in groups of two and are symmetrically arranged on both sides of the axis of the pin shaft hole (5); each of the bracket mounting bosses (102) is connected via an arc transition section (101).

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