New energy heavy truck leaf spring

Abstract

The utility model discloses a new energy heavy truck plate spring, including a plurality of spring leaf and a plurality of gasket, a plurality of spring leaf and a plurality of gasket from bottom to top are alternately stacked and fixedly connected in proper order, form inverted trapezoid's new energy heavy truck plate spring, the upper and lower surface of each gasket is coated with lubricant, and each gasket is equipped with a plurality of oil storage holes respectively through its upper and lower surface, and each oil storage hole is filled with lubricant. The utility model discloses the gasket of different material with spring leaf is used for the isolation between spring leaf, and smears lubricant (lubricating grease + copper powder) on the upper and lower surface of gasket, avoids the direct friction between spring leaf and spring leaf on the basis of guaranteeing that plate spring stiffness performance does not change, and is by the friction between spring leaf and gasket, owing to the spring leaf and gasket belong to different material, add lubricant, can very good avoid the generation of abnormal sound, can very good satisfy the high demand of new energy heavy truck to the sound of plate spring.

Description

Technical Field

[0001] This utility model relates to the field of automotive leaf spring technology, specifically a leaf spring for a new energy heavy truck. Background Technology

[0002] Leaf springs, as the elastic element of the rear suspension of new energy heavy-duty trucks, have each leaf approximately 22-30 mm thick and 90 mm wide, with about 12 leaves in total. They are multi-leaf steel springs, possessing high load-bearing capacity and meeting the performance requirements of various harsh working conditions. However, due to the large number of leaves and the heavy load they bear, relative displacement occurs between the leaves, generating friction and causing significant abnormal noise. This problem is particularly noticeable in new energy heavy-duty trucks. Utility Model Content

[0003] The purpose of this utility model is to overcome the defects and deficiencies of the existing technology and provide a new energy heavy truck leaf spring. While ensuring that the stiffness performance of the leaf spring remains unchanged, it avoids direct friction between the leaf springs and avoids friction between the leaf springs and the washer. With the help of a lubricant, it avoids the generation of abnormal noise and meets the high requirements of new energy heavy trucks for leaf spring noise.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A new energy heavy truck leaf spring includes several spring leaves and several washer leaves. The leaf leaves and washer leaves are stacked alternately from bottom to top and fixedly connected to form an inverted trapezoidal new energy heavy truck leaf spring. The upper and lower surfaces of each washer are coated with lubricant, and each washer is provided with several oil storage holes penetrating its upper and lower surfaces. Each oil storage hole is filled with lubricant.

[0005] Furthermore, each spring is made of alloy spring steel with a hardness of HRC45; each gasket is made of Q235 galvanized sheet with a hardness of HRC21.

[0006] Furthermore, the plurality of oil storage holes are evenly distributed in a W-shape or M-shape along the length of the gasket.

[0007] Furthermore, the lubricant is composed of grease and copper powder mixed in a 1:1 mass ratio.

[0008] Furthermore, the middle portions of the plurality of spring sheets and the plurality of gaskets are respectively provided with through holes that are interconnected. A screw passes through all the through holes from top to bottom and extends out. A locking nut is screwed onto the extended end of the screw. Tightening the locking nut is used to fix and connect the plurality of spring sheets and the plurality of gaskets that are alternately stacked from bottom to top.

[0009] Furthermore, in the inverted trapezoidal leaf spring of the new energy heavy truck, both the uppermost and lowermost layers are spring sheets.

[0010] Compared with the prior art, the beneficial effects of this utility model are: This invention uses a gasket made of a different material than the leaf spring to isolate the leaf springs. Lubricant (grease + copper powder) is applied to the upper and lower surfaces of the gasket. While ensuring that the stiffness of the leaf spring remains unchanged, direct friction between the leaf springs is avoided. Instead, friction occurs between the leaf spring and the gasket. Since the leaf spring and the gasket are made of different materials and lubricant is applied, abnormal noise can be effectively avoided, which can well meet the high requirements of new energy heavy trucks for leaf spring noise. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the structure of a single gasket in this utility model. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] See Figure 1 , 2 A new energy heavy truck leaf spring includes several spring leaves 1 and several washer leaves 2. The spring leaves 1 and several washer leaves 2 are stacked alternately from bottom to top and fixedly connected to form an inverted trapezoidal new energy heavy truck leaf spring. The upper and lower surfaces of each washer 2 are coated with lubricant, and each washer 2 is provided with several oil storage holes 3 penetrating its upper and lower surfaces. Each oil storage hole 3 is filled with lubricant.

[0015] In this invention, each spring 1 is made of alloy spring steel with a hardness of HRC45; each gasket 2 is made of Q235 galvanized sheet with a hardness of HRC21.

[0016] Therefore, by the mutual friction between the spring 1 and the washer 2, which are made of two different materials, the probability of abnormal noise can be effectively reduced.

[0017] In this invention, several oil storage holes 3 are evenly distributed in a W-shape or M-shape along the length of the gasket 2.

[0018] Therefore, the oil storage holes 3 evenly distributed in W or M shapes on the gasket 2 can store lubricant, so that the spring 1 and the gasket 2 can still maintain smooth lubrication after a long period of friction, which is conducive to maintaining a state that reduces abnormal noise.

[0019] In this invention, the lubricant is a mixture of grease and copper powder in a 1:1 mass ratio, and is a paste at room temperature.

[0020] It should be noted that friction between the spring 1 and the washer 2 easily generates high temperatures, causing conventional grease to dry out and disappear. The lubricant used in this invention is a mixture of grease and copper powder in a 1:1 mass ratio, which enhances the lubrication effect, extends the lubrication working time, and meets the life requirements of the entire vehicle.

[0021] Specifically, copper powder can effectively delay the drying of lubricating grease at high temperatures, and its mechanism of action is mainly achieved through the following pathways: Physical protection: Copper powder (especially nano / micron grade) is deposited on the friction surface to form a self-healing film, reducing the loss and oxidation of the base oil in the grease.

[0022] Improved chemical stability: Copper powder, as an antioxidant, can inhibit the oxidative decomposition of base oil in grease at high temperatures.

[0023] Thermal conductivity optimization: Copper's high thermal conductivity is beneficial for heat dissipation, which can reduce local temperature and reduce grease evaporation.

[0024] Enhanced structural stability: Copper powder can improve the soap fiber structure of grease and delay oil separation and precipitation.

[0025] In this utility model, several spring sheets 1 and several gasket sheets 2 are respectively provided with through holes 6 that are interconnected in the middle part. A screw 4 passes through all the through holes 6 from top to bottom and extends out. A locking nut 5 is screwed onto the extended end of the screw 4.

[0026] Thus, by tightening the locking nut 5, which abuts against the bottom surface of the inverted trapezoidal new energy heavy truck leaf spring, and causing the nut end of the screw 4 to abut against the top surface of the inverted trapezoidal new energy heavy truck leaf spring, the several spring plates 1 and several washer plates 2, which are alternately stacked from bottom to top, are fixedly connected.

[0027] In this invention, the inverted trapezoidal leaf spring of the new energy heavy truck has spring sheets at the top and bottom, which can further ensure that the stiffness performance of the leaf spring does not change.

[0028] The present invention will be further described below with reference to the accompanying drawings: During assembly, lubricant is first applied to the upper and lower surfaces of each pad 2, and then several springs 1 and several pads 2 are stacked alternately from bottom to top.

[0029] It should be noted that after stacking each gasket 2 on the lower spring and before stacking other springs on it, lubricant needs to be filled into each oil reservoir 3 on the gasket 2.

[0030] Finally, the screw 4 is passed through all the through holes 6 from top to bottom and extended out. The locking nut 5 is screwed onto the extended end of the screw 4 and then the locking nut 5 is tightened. This fixes the several spring plates 1 and several washer plates 2 that are alternately stacked from bottom to top, and they can be assembled into an inverted trapezoidal leaf spring for new energy heavy trucks.

[0031] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0032] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A leaf spring for a new energy heavy-duty truck, comprising a plurality of spring leaves and a plurality of washer leaves, characterized in that: The aforementioned leaf springs and gaskets are stacked alternately from bottom to top and fixedly connected to form an inverted trapezoidal leaf spring for new energy heavy trucks. The upper and lower surfaces of each gasket are coated with lubricant, and each gasket has several oil storage holes penetrating its upper and lower surfaces, with each oil storage hole filled with lubricant.

2. The leaf spring for a new energy heavy-duty truck according to claim 1, characterized in that: Each spring is made of alloy spring steel with a hardness of HRC45; each gasket is made of Q235 galvanized sheet with a hardness of HRC21.

3. The leaf spring for a new energy heavy-duty truck according to claim 1, characterized in that: The aforementioned oil storage holes are evenly distributed in a W-shape or M-shape along the length of the gasket.

4. A leaf spring for a new energy heavy-duty truck according to claim 1, characterized in that: The middle portions of the plurality of spring sheets and the plurality of washers are respectively provided with through holes that pass through each other. A screw passes through all the through holes from top to bottom and extends out. A locking nut is screwed onto the extended end of the screw. Tightening the locking nut is used to fix the plurality of spring sheets and the plurality of washers that are alternately stacked from bottom to top together.

5. A leaf spring for a new energy heavy-duty truck according to claim 1 or 4, characterized in that: The inverted trapezoidal leaf spring of the new energy heavy truck has leaf springs on both the top and bottom layers.

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