Main spring anti-disengagement structure for suspension

Abstract

The utility model discloses a main spring anti-disengagement structure for suspension, and relates to the technical field of vehicle suspension systems. Comprising a shell, a main spring piece and a cantilever, the main spring piece is fixedly installed on the shell, the cantilever is fixedly installed on the main spring piece, the main spring piece comprises a main spring body, an upper insert and a lower insert, the main spring body is formed by rubber vulcanization and wraps the upper insert and the lower insert, the lower insert is a sheet metal part, and the upper insert and the lower insert are fixedly installed on the shell. The sheet metal part is provided with an extension part, and the extension part is bent to form an inverted buckle part, so that the main spring part is prevented from being separated from the shell. According to the main spring anti-disengaging structure, after the main spring piece is pressed into the shell, fixing can be completed by bending the extension part once, additional assemblies are not needed, the machining cost is reduced, the production efficiency is improved, and the structure is simple and reliable and easy to operate; the inverted buckle piece is matched with the limiting groove in the bottom of the mounting groove, so that the anti-vibration performance is excellent; the sheet metal part is completely vulcanized in the rubber, and the surface does not need to be subjected to anti-corrosion treatment.

Description

TECHNICAL FIELD

[0001] The utility model relates to a vehicle suspension system technical field, concretely relates to a suspension is with main spring anti -disengagement structure. BACKGROUND

[0002] In the prior art vehicle suspension system, the main spring is usually fixed by being pressed into the shell. The conventional anti-disengagement structure is designed by using a hook or a buckle, for example, a metal hook or a complex buckle structure is used to limit the main spring. However, such a solution has the following defects:

[0003] Complex structure: the hook or the buckle needs to be additionally processed, which increases the assembly steps and cost;

[0004] Insufficient reliability: fatigue fracture or deformation is prone to occur under long-term vibration environment;

[0005] Corrosion prevention requirement: the metal part needs to be additionally treated for corrosion prevention when exposed to the external environment, which increases the process complexity. SUMMARY

[0006] The utility model discloses a suspension is with main spring anti -disengagement structure, and it is designed to solve at least one of the technical problems of the prior art.

[0007] To achieve the above-mentioned purpose, the utility model adopts the technical scheme as follows:

[0008] A suspension main spring anti-disengagement structure, comprising a shell, a main spring part and a cantilever, the main spring part is fixedly installed on the shell, the cantilever is fixedly installed on the main spring part, the main spring part includes a main spring body, an upper insert and a lower insert, the main spring body is vulcanized by rubber and covers the upper insert and the lower insert, the lower insert is a sheet metal part, the sheet metal part has an epitaxial part, a reverse buckle is formed by bending the epitaxial part to prevent the main spring part from disengaging from the shell.

[0009] As a further scheme of the utility model: a mounting groove matched with the main spring part is formed in the shell, and the main spring part is fixedly installed in the mounting groove.

[0010] As a further scheme of the utility model: a limiting groove matched with the reverse buckle is formed in the bottom of the mounting groove.

[0011] As a further scheme of the utility model: the sheet metal part includes a middle part and side edge parts symmetrically arranged on both sides of the middle part, the side edge parts and the middle part on both sides jointly form a W-shaped structure, and the epitaxial part is arranged on the front side of the middle part.

[0012] As a further scheme of the utility model: the installation groove left and right sides are equipped with inclined guide grooves respectively, the main spring piece left and right sides are clamped in the corresponding inclined guide grooves respectively.

[0013] As a further scheme of the utility model: the cantilever and the main spring piece are fixed together through interference fit.

[0014] As a further scheme of the utility model: the bending angle of the reverse buckle piece is 90°-120°.

[0015] As a further scheme of the utility model: the thickness of the lower insert is 1.5mm-2.5mm.

[0016] As a further scheme of the utility model: the rubber hardness of the main spring body is 40ShA-60ShA.

[0017] As a further scheme of the utility model: the upper insert and the lower insert surface are sandblasted, and the sandblasting roughness Ra is 4.0 μm-8.0 μm.

[0018] The utility model has the advantages of:

[0019] The main spring in the utility model is formed by vulcanizing the rubber vulcanization forming main spring body to cover the upper insert and the lower insert, the lower insert is a sheet metal part, the process is simple, the cost is low, the sheet metal part has an epitaxial part, the reverse buckle piece is formed by bending the epitaxial part, the reverse buckle piece and the shell are matched to prevent the main spring piece from being pulled out of the shell; without additional components, the processing cost is reduced, the main spring piece is fixed after single bending, the production efficiency is improved, and the structure is simple and reliable, easy to operate;

[0020] The reverse buckle piece and the limiting groove at the bottom of the installation groove are matched, and the anti-vibration performance is excellent;

[0021] The sheet metal part is vulcanized in the rubber, and the surface does not need to be treated. ACCURACY OF DRAWINGS

[0022] The utility model will be further described below with reference to the drawings.

[0023] Figure 1 It is a main spring anti-extrusion structure schematic diagram for suspension of the utility model;

[0024] Figure 2 It is an explosion schematic diagram of the main spring anti-extrusion structure for suspension of the utility model;

[0025] Figure 3 It is an upper insert and lower insert structure schematic diagram of the utility model;

[0026] Figure 4 It is a shell structure schematic diagram of the utility model.

[0027] Fig. 1, housing; 11, mounting groove; 12, limiting groove; 13, inclined guide groove; 2, main spring piece; 21, main spring body; 22, upper insert; 23, lower insert; 231, middle part; 232, side part; 24, outer extension; 3, cantilever. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0029] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, a particular orientation configuration and an operation, therefore, it should not be understood as a limitation on the present application.

[0030] In addition, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] Embodiment one

[0032] Please refer to Figures 1-4 The present application provides a main spring anti-disengagement structure for suspension, which comprises a housing 1, a main spring piece 2 and a cantilever 3. The main spring piece 2 is fixedly installed on the housing 1, please refer to Figure 4 The mounting groove 11 is formed on the housing 1 and is matched with the main spring piece 2. The main spring piece 2 is fixedly installed in the mounting groove 11 by pressing the end into the mounting groove 11, and the cantilever 3 is fixed together with the main spring piece 2 by interference fit. It is worth noting that, please refer to Figure 2 The main spring piece 2 comprises a main spring body 21, an upper insert 22 and a lower insert 23. The main spring body 21 is vulcanized from rubber and covers the upper insert 22 and the lower insert 23. The rubber hardness of the main spring body 21 is 40ShA-60ShA.

[0033] Please refer to Figure 3As shown, the thickness of the lower insert 23 is 1.5mm-2.5mm, the lower insert 23 is a sheet metal part, and the sheet metal part has an extension 24, and the extension 24 is bent to form a reverse buckle part, the reverse buckle part cooperates with the shell 1 to prevent the main spring part 2 from being pulled out of the shell 1, and the bending angle of the reverse buckle part is 90°-120°.

[0034] Preferably, the surfaces of the upper insert 22 and the lower insert 23 are sandblasted, and the sandblasting roughness Ra is 4.0μm-8.0μm, which can significantly increase the contact area between the rubber and the metal, and the bonding strength after vulcanization is increased by 30%, thereby avoiding separation between the insert and the rubber layer.

[0035] Example Two

[0036] As in Example One, the main spring anti-pulling-out structure for suspension provided in this example includes a shell 1, a main spring part 2, and a suspension arm 3. The main spring part 2 is fixedly installed on the shell 1, and the shell 1 is provided with an installation groove 11 adapted to the main spring part 2. The main spring part 2 is fixedly installed in the installation groove 11 by pressing the end part into the installation groove 11, and the suspension arm 3 is fixedly installed on the main spring part 2 by interference fit. The main spring part 2 includes a main spring body 21, an upper insert 22, and a lower insert 23, and the main spring body 21 is formed by vulcanization of rubber and covers the upper insert 22 and the lower insert 23. The lower insert 23 is a sheet metal part, and the sheet metal part has an extension 24, and the extension 24 is bent to form a reverse buckle part, and the reverse buckle part cooperates with the shell 1 to prevent the main spring part 2 from being pulled out of the shell 1.

[0037] Based on Example One, in this example, please refer to Figure 4 As shown, the bottom of the installation groove 11 is provided with a limiting groove 12 matched with the reverse buckle part, and after the main spring part 2 is pressed and fixed in the installation groove 11, the extension 24 of the lower insert 23 is bent by a tool to form a reverse buckle part, and the reverse buckle part is clamped in the limiting groove 12 at the bottom of the installation groove 11, thereby preventing the main spring part 2 from being pulled out of the shell 1.

[0038] Example Three

[0039] As in Example One or Example Two, the main spring anti-pulling-out structure for suspension provided in this example includes a shell 1, a main spring part 2, and a suspension arm 3. The main spring part 2 is fixedly installed on the shell 1, and the shell 1 is provided with an installation groove 11 adapted to the main spring part 2. The main spring part 2 is fixedly installed in the installation groove 11 by pressing the end part into the installation groove 11, and the suspension arm 3 is fixedly installed on the main spring part 2. The main spring part 2 includes a main spring body 21, an upper insert 22, and a lower insert 23, and the main spring body 21 is formed by vulcanization of rubber and covers the upper insert 22 and the lower insert 23. The lower insert 23 is a sheet metal part, and the sheet metal part has an extension 24, and the extension 24 is bent to form a reverse buckle part, and the reverse buckle part cooperates with the shell 1 to prevent the main spring part 2 from being pulled out of the shell 1.

[0040] In this embodiment, on the basis of Embodiment One or Embodiment Two, please refer to Figure 3 As shown in the figure, the sheet metal part includes a middle part 231 and side edge parts 232 symmetrically arranged on both sides of the middle part 231, and the two side edge parts 232 and the middle part 231 together form a W-shaped structure, and the outer extension part 24 is arranged on the front side of the middle part 231. In order to adapt to the sheet metal part with a W-shaped structure, the inclined guide groove 13 is arranged on the left and right sides of the mounting groove 11 of the shell 1, respectively. During installation, the left and right sides of the main spring part 2 are respectively clamped in the corresponding inclined guide groove 13, and through the cooperation of the inclined guide groove 13 and the undercut part, the main spring part 2 is firmly fixed and installed in the mounting groove 11 of the shell 1.

[0041] The anti-extrusion structure of the utility model is deformed by the outer extension part 24 of the sheet metal part to prevent extrusion, without additional components, reducing the processing cost, the main spring part 2 is pressed in and single bending can complete the fixation, improving the production efficiency, and the structure is simple and reliable, easy to operate. Through the cooperation of the undercut part and the limiting groove 12 at the bottom of the mounting groove 11, the vibration resistance is excellent, the lower embedded part 23 adopts a sheet metal part, the process is simple, and the cost is low. The sheet metal part is vulcanized in the rubber, and the surface does not need to be treated for corrosion prevention.

[0042] The above describes the preferred embodiments of the utility model in detail, which cannot be considered as limiting the scope of the utility model. Any equivalent changes and improvements within the scope of the utility model application shall still belong to the patent coverage of the utility model.

Claims

1. A main spring anti-extrusion structure for suspension, comprising a housing (1), a main spring member (2) and a cantilever (3), the main spring member (2) is fixedly installed on the housing (1), and the cantilever (3) is fixedly installed on the main spring member (2), characterized in that: The main spring piece (2) comprises a main spring body (21), an upper insert (22) and a lower insert (23), the main spring body (21) is vulcanized and formed by rubber and covers the upper insert (22) and the lower insert (23), the lower insert (23) is a sheet metal piece, the sheet metal piece is provided with an extension part (24), a reverse piece is formed by bending the extension part (24), and the main spring piece (2) is prevented from being pulled out of the shell (1).

2. The anti-extraction structure of a main spring for suspension according to claim 1, characterized in that: The shell (1) is provided with a mounting groove (11) matched with the main spring piece (2), and the main spring piece (2) is fixedly installed in the mounting groove (11).

3. The anti-extraction structure of a main spring for suspension according to claim 2, characterized in that: The bottom of the mounting groove (11) is provided with a limiting groove (12) matched with the reverse piece.

4. The anti-extraction structure of a main spring for suspension according to claim 3, characterized in that: The sheet metal piece comprises a middle part (231) and side edge parts (232) symmetrically arranged on both sides of the middle part (231), the side edge parts (232) and the middle part (231) on both sides jointly form a W-shaped structure, and the extension part (24) is arranged on the front side of the middle part (231).

5. The anti-extraction structure of a main spring for suspension according to claim 4, characterized in that: The mounting groove (11) is provided with inclined guide grooves (13) on the left and right sides, respectively, and the main spring piece (2) is clamped in the corresponding inclined guide grooves (13) on the left and right sides, respectively.

6. The anti-extraction structure of a main spring for suspension according to claim 1, characterized in that: The cantilever (3) and the main spring piece (2) are fixed together through interference fit.

7. The anti-extraction structure of a main spring for suspension according to claim 1, characterized in that: The bending angle of the reverse piece is 90°-120°.

8. The anti-extraction structure of a main spring for suspension according to claim 1, characterized in that: The thickness of the lower insert (23) is 1.5mm-2.5mm.

9. The anti-extraction structure of a main spring for suspension according to claim 1, characterized in that: The rubber hardness of the main spring body (21) is 40ShA-60ShA.

10. The anti-extraction structure of a main spring for suspension according to claim 1, characterized in that: The surfaces of the upper insert (22) and the lower insert (23) are subjected to sand blasting treatment, and the sand blasting roughness Ra is 4.0-8.0um.

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