High-strength special steel plate spring with heeling structure

Abstract

The utility model discloses a high-strength special steel plate spring with a heeling structure. Comprising a first steel plate spring hung on an automobile frame, a second steel plate spring, a third steel plate spring, a fourth steel plate spring, a fifth steel plate spring, a sixth steel plate spring and a locking bolt, wherein the second steel plate spring, the third steel plate spring, the fourth steel plate spring, the fifth steel plate spring and the sixth steel plate spring are stacked on the first steel plate spring; annular oil grooves are formed in the positions, corresponding to the circumferential sides of the locking bolts, of the top faces of the second steel plate spring, the third steel plate spring, the fourth steel plate spring, the fifth steel plate spring and the sixth steel plate spring, and a plurality of oil feeding grooves capable of independently communicating with the annular oil grooves in the steel plate springs are formed in the side walls of the locking bolts. A plurality of oil guide wire grooves communicated with the annular oil groove extend out of the outer side of the annular oil groove. The utility model has the characteristics that the occurrence of abnormal sound or noise is reduced, the abrasion of the steel plate spring is reduced, the service life of the steel plate spring is prolonged, and the automobile driving experience is improved.

Description

Technical Field

[0001] The utility model belongs to a leaf spring, and particularly relates to a high-strength special leaf spring with a roll structure. Background Art

[0002] A leaf spring is a widely used elastic element in an automobile suspension. It is an approximately equal-strength elastic beam composed of several spring leaves. When the leaf spring is installed in an automobile suspension and the vertical load it bears is positive, each spring leaf is deformed by force and has a tendency to arch upward. At this time, the axle and the vehicle frame approach each other. When the axle and the vehicle frame move away from each other, the positive vertical load and deformation borne by the leaf spring gradually decrease and sometimes even reverse, thus playing a good buffering role. However, during the working process of the leaf spring, relative friction between the leaf springs always exists. After years of use, the leaf springs rub against each other and wear, becoming relatively rough, causing abnormal noises or noises during the driving of the automobile. Achieving good lubrication between the leaf springs is not only a way to extend the service life of the leaf springs but also plays an important role in improving the driving experience of the automobile. Content of the Utility Model

[0003] The purpose of the utility model is to provide a high-strength special leaf spring with a roll structure, which solves the problems existing in the prior art and can not only extend the service life of the leaf spring but also improve the driving experience of the automobile.

[0004] The above technical purpose of the utility model is mainly solved by the following technical solution: A high-strength special leaf spring with a roll structure includes a first leaf spring suspended on an automobile vehicle frame, and a second leaf spring, a third leaf spring, a fourth leaf spring, a fifth leaf spring, and a sixth leaf spring that are stacked with the first leaf spring and have gradually shortened lengths, and a locking bolt that sequentially passes through all the leaf springs and is locked and fixed. Annular oil grooves are respectively arranged on the top surfaces of the second leaf spring, the third leaf spring, the fourth leaf spring, the fifth leaf spring, and the sixth leaf spring corresponding to the periphery of the locking bolt. A plurality of oil supply grooves that can be respectively and independently communicated with the annular oil grooves on each leaf spring are arranged on the side wall of the locking bolt. A plurality of oil guide wire grooves communicated with the annular oil grooves extend outside the annular oil grooves.

[0005] As a further preferred technical solution of the utility model; each of the oil supply grooves is arranged along the axial direction of the locking bolt.

[0006] As a further preferred technical solution of the utility model; the top openings of the oil supply grooves are exposed outside the top surface of the nut that is in threaded fit with the locking bolt.

[0007] As a further preferred technical solution of the present utility model; the lengths of the respective oil supply grooves are different and correspond to the positions of the leaf springs of each layer one by one.

[0008] As a further preferred technical solution of the present utility model; the oil guiding wire grooves extend along the length direction of each leaf spring and are distributed on both sides of the annular oil groove.

[0009] As a further preferred technical solution of the present utility model; the nut of the locking bolt abuts against the bottom surface of the sixth leaf spring, a rib is provided on the bottom surface of the sixth leaf spring, and a groove matching the rib is provided on the nut of the locking bolt.

[0010] Therefore, the present utility model has the characteristics of reducing the occurrence of abnormal noises or noises, reducing the wear of the leaf springs, prolonging the service life of the leaf springs, and improving the driving experience of the vehicle. Description of the Drawings

[0011] Figure 1 is a structural schematic diagram of the present utility model;

[0012] Figure 2 is Figure 1 a structural sectional view of the cooperation between the second leaf spring, the third leaf spring, the fourth leaf spring, the fifth leaf spring, the sixth leaf spring and the locking bolt in

[0013] Figure 3 is Figure 1 a structural distribution schematic diagram of the oil supply grooves, the annular oil groove and the oil guiding wire grooves in

[0014] Figure 4 is Figure 1 a three-dimensional structure diagram of the locking bolt in

[0015] Figure 5 is Figure 1 a structural schematic diagram of the cooperation between the locking bolt and the sixth leaf spring in Detailed Embodiments

[0016] The technical solutions of the present utility model will be further specifically described below through embodiments in conjunction with the drawings.

[0017] As shown in Figures 1-3As shown in the figure, a high-strength special steel leaf spring with a roll structure includes a first leaf spring 1 suspended on an automobile frame, and second, third, fourth, fifth, sixth, and seventh leaf springs 2, 3, 4, 5, 6, and 7 that are stacked with the first leaf spring 1 and have gradually decreasing lengths. A locking bolt 7 passes through all the leaf springs in sequence and is locked and fixed. The characteristics are as follows: annular oil grooves 21 are provided on the top surfaces of the second, third, fourth, fifth, and sixth leaf springs 2, 3, 4, 5, and 6 corresponding to the periphery of the locking bolt 7. A plurality of oil supply grooves 71 that can be independently communicated with the annular oil grooves 21 on each leaf spring are provided on the side wall of the locking bolt 7. A number of oil guiding wire grooves 22 communicated with the annular oil grooves 21 extend outside the annular oil grooves 21. The nut 73 of the locking bolt 7 abuts against the bottom surface of the sixth leaf spring 6. A rib 61 is provided on the bottom surface of the sixth leaf spring 6. A groove 731 cooperating with the rib 61 is provided on the nut 73 of the locking bolt 7. The structures of the above-mentioned first, second, third, fourth, fifth, and sixth leaf springs that are stacked with each other and have gradually decreasing lengths and the structure of being locked by passing through the locking bolt are the same as those in the prior art. It has a roll structure, plays a roll role, can stabilize the vehicle body, adjust the vehicle body posture, and is made of high-strength steel. The setting of the above-mentioned plurality of oil supply grooves enables the driver or maintenance worker to directly send lubricating oil into each oil supply groove from the outside, making the addition of lubricating oil more convenient. Each oil supply groove is respectively communicated with the annular oil groove of each leaf spring, so as to facilitate the separate delivery of lubricating oil to the top surface of the corresponding leaf spring, enabling the lubricating oil to enter the corresponding oil guiding wire groove through the annular oil groove, realizing the rapid delivery of lubricating oil, so that the lubricating oil can be quickly delivered between every two leaf springs, increasing the lubrication degree between every two leaf springs, thereby reducing the wear of the leaf springs, extending the service life of the leaf springs, and improving the driving experience of the vehicle.

[0018] The number of layers of the leaf springs set in this embodiment is not limited to six layers, and different numbers of layers can be set according to actual needs. The number of oil supply grooves provided is the same as the number of layers of the leaf springs. During actual operation, a certain amount of lubricating oil is sent into each oil supply groove through a thin tube. The lubricating oil flows into each annular oil groove along the oil supply grooves respectively. After filling the annular oil groove, it flows along the oil guiding wire groove until the oil guiding wire groove is filled with lubricating oil, so as to play a lubricating role between every two leaf springs, reduce the wear when the leaf springs act, and reduce the occurrence of abnormal noise or noise. At the same time, a groove is provided on the nut of the locking bolt, corresponding to the rib on the bottom surface of the sixth leaf spring, and they are mutually engaged to realize the circumferential positioning of the locking bolt, so as to accurately position each oil supply groove, enabling the oil supply groove to be respectively communicated with the annular oil grooves of each layer, and accurately delivering the flow of the lubricating oil.

[0019] Such as Figures 1-5As shown, each oil supply groove 71 is arranged along the axial direction of the locking bolt 7. The top opening of the oil supply groove 71 exposes outside the top surface of the nut 72 that is threadedly engaged with the locking bolt 7. The lengths of the oil supply grooves 71 are different and correspond to the positions of each layer of leaf springs one by one. The oil guiding grooves 22 extend along the length direction of each leaf spring and are distributed on both sides of the annular oil groove 21. The above-mentioned oil supply grooves are axially arranged and distributed on the side wall of the locking bolt to form a grooved structure, so that the lubricating oil can directly flow into the corresponding annular oil groove. The top opening of the oil supply groove exposes outside the top surface of the nut that is threadedly engaged with the locking bolt. After the nut is tightened on the screw rod of the locking bolt, it is convenient to directly send the lubricating oil into the oil supply groove from the outside, making it more convenient to add lubricating oil. In order to prevent dust and blockage, a semi-enclosed structure can be designed separately and a housing that is threadedly engaged with the exposed screw rod of the locking bolt can be used to cover and surround the exposed oil supply groove, which can prevent external impurities such as mud and dust from blocking the oil supply groove.

[0020] The sixth leaf spring in this embodiment is the last layer of leaf spring that contacts the nut. In fact, the last layer of leaf spring that contacts the nut is not limited to the sixth leaf spring. According to the number of layers, the last layer of leaf spring always remains in contact with the nut. The convex strip is always provided on the bottom surface of the last layer of leaf spring, not limited to the sixth leaf spring. The above-mentioned oil guiding grooves are evenly distributed on the top surface of each leaf spring and several are provided to play a guiding role in the flow of the lubricating oil and increase the limiting and accumulating ability of the lubricating oil, reduce the amount of lubricating oil seeping out between the leaf springs, and during the movement of the leaf spring, the lubricating oil accumulated in the oil guiding grooves can be continuously squeezed to the friction surface of the leaf spring, which can extend the lubrication time of the lubricating oil.

[0021] The above embodiments are the preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the technical solution is within the protection scope of the present invention.

Claims

1. A high-strength special steel leaf spring with a roll structure, comprising a first steel leaf spring (1) suspended on a vehicle frame, a second steel leaf spring (2), a third steel leaf spring (3), a fourth steel leaf spring (4), a fifth steel leaf spring (5), a sixth steel leaf spring (6) which are stacked and distributed with the first steel leaf spring (1) and have successively shorter lengths, and a locking bolt (7) which passes through all the steel leaf springs in sequence and is locked and fixed, characterized in that: An annular oil groove (21) is provided on the top surface of the second leaf spring (2), the third leaf spring (3), the fourth leaf spring (4), the fifth leaf spring (5) and the sixth leaf spring (6) corresponding to the circumference of the locking bolt (7); a plurality of oil delivery grooves (71) which can be independently connected to the annular oil groove (21) on each leaf spring are provided on the side wall of the locking bolt (7); and a plurality of oil guide grooves (22) which are connected to the annular oil groove (21) are extended outside the annular oil groove (21).

2. The high-strength special steel leaf spring with a tilting structure according to claim 1, characterized in that: Each of the oil delivery grooves (71) is arranged along the axial direction of the locking bolt (7).

3. The high-strength special steel leaf spring with a tilting structure according to claim 1 or 2, characterized in that: The top opening of the oil delivery groove (71) is exposed outside the top surface of a nut (72) threadably matched with the locking bolt (7).

4. The high-strength special steel leaf spring with a tilting structure according to claim 1 or 2, characterized in that: The lengths of the oil delivery grooves (71) are different and correspond one-to-one to the positions of the leaf springs of each layer.

5. The high-strength special steel leaf spring with a tilting structure according to claim 1, characterized in that: The oil guide grooves (22) are extended along the length direction of each leaf spring and are distributed on both sides of the annular oil groove (21).

6. The high-strength special steel leaf spring with a tilting structure according to claim 1, characterized in that: The nut (73) of the locking bolt (7) abuts against the bottom surface of the sixth steel leaf spring (6), a convex strip (61) is provided on the bottom surface of the sixth steel leaf spring (6), and a groove (731) matching the convex strip (61) is provided on the nut (73) of the locking bolt (7).

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