Auxiliary battery supporting cushion assembly and auxiliary battery system thereof

Abstract

The utility model relates to the field of heavy truck auxiliary battery assembly systems, in particular to an auxiliary battery supporting cushion assembly which comprises a connecting support and a main body rubber vibration reduction unit installed in the connecting support, and the main body rubber vibration reduction unit comprises inner cores arranged on the two sides respectively. The outer edge of the inner core is provided with a stop part and a bearing part extending from outside to inside; a cavity for containing the bearing bushings is formed between the inner core and the connecting support, the bearing bushings are arranged in a split and opposite mode, the axial rigidity of the suspension assembly can be improved, and the bearing capacity of a system is improved. Through the design of the connecting bracket and the main body rubber vibration reduction unit mounted in the connecting bracket, on one hand, the battery assembly is connected with the frame girder; on the other hand, the suspended rubber main body structure can effectively attenuate vibration and impact transmitted by the road surface; the battery system is protected to run perfectly under various road conditions; and meanwhile, the suspension system has excellent reliability.

Description

Technical Field

[0001] The utility model relates to the field of heavy truck auxiliary battery assembly systems, in particular to an auxiliary battery support cushion assembly and an auxiliary battery system thereof. Background Art

[0002] With the development of new energy vehicles, some heavy-duty trucks are now using battery systems as a power source. The battery system for the power battery and other components is now split into two parts. Both the power battery and the auxiliary battery require specialized vibration damping assembly components. The patents retrieved primarily address the large size of batteries in traditional fuel vehicles by designing a main support frame, but lack a vibration damping unit or employ software designed for transmission engine mounts to support the battery system. These designs utilize specialized adapter brackets to connect to the battery system, without specialized rubber vibration damping components designed for heavy-duty truck battery systems. Consequently, both the vibration damping performance and the reliability of the mount itself are poor.

[0003] Currently, most of the suspension structure designs for new energy heavy-duty truck battery systems are based on conventional battery suspension system solutions for fuel vehicles.

[0004] A search of CN21720942502.5 found a flexible structure connecting a battery box and a vehicle frame. The rubber body is a block structure with a simple structure. To protect the rubber body from damage, the utility model is designed with multiple metal protection mechanisms. The structure is complex to assemble, has insufficient reliability, and is only suitable for transmission battery structures.

[0005] CN22020636511.3 proposes a flexible anti-torsion device for power batteries, which uses the traditional engine suspension as a vibration reduction structure and connects it to the vehicle frame through an adapter bracket. This solution is not suitable for large-tonnage power battery systems, otherwise the vibration reduction structure will easily fail prematurely.

[0006] CN22122369993.8 proposes a battery bracket solution that is simple to assemble and easy to implement modularly, but does not match the corresponding suspension vibration reduction elements.

[0007] Therefore, it is necessary to design a dedicated connection and support solution for the auxiliary battery, which is not only easy to install but also can effectively improve the vibration attenuation of the battery system, filling the gap in the suspension support technology of the auxiliary battery system of heavy trucks. Utility Model Content

[0008] In view of the shortcomings of the existing technology, the auxiliary battery system of heavy-duty trucks is currently rarely used in the existing technology, and no dedicated suspension support system is designed, or the transmission engine suspension is used as a substitute; therefore, the entire battery system has a poor effect on attenuating vibrations transmitted from the ground, and even the suspension breaks and fails prematurely; it cannot play an effective role in connection and limiting protection. The utility model discloses an auxiliary battery support cushion assembly, which connects the battery assembly and the frame beam through the design of a connecting bracket and a main rubber vibration reduction unit installed inside the connecting bracket; on the other hand, the suspended rubber main structure can effectively attenuate vibrations and impacts transmitted from the road surface; protect the battery system from operating properly under various road conditions; and at the same time, the suspension system itself has excellent reliability. This structure can achieve lifelong maintenance-free, eliminating the need for the driver to perform regular maintenance.

[0009] The technical means adopted by the present invention to solve the above problems are:

[0010] Disclosed is an auxiliary battery support cushion assembly, comprising a connecting bracket and a main rubber vibration damping unit installed inside the connecting bracket. The main rubber vibration damping unit includes an inner core disposed on both sides, wherein the outer edge of the inner core is provided with a stop portion and a load-bearing portion extending from the outside to the inside; a cavity for accommodating a support bushing is formed between the inner core and the connecting bracket, and the support bushings are disposed separately and in pairs, which can increase the axial stiffness of the suspension assembly and improve the load-bearing capacity of the system.

[0011] The auxiliary battery support cushion assembly of this utility model can realize the connection between the auxiliary battery and the vehicle frame, and is easy to install and operate. By connecting multiple cushion assemblies together to form a vibration reduction system, it can effectively attenuate the vibration and impact transmitted to the battery by the road surface.

[0012] Furthermore, the support bushing is interference-pressed into the connecting bracket. The support bushing comprises a rubber body and an outer sleeve. The outer sleeve is in contact with the inner wall of the connecting bracket, and the rubber body is engaged with the outer edge of the inner core. The auxiliary battery support cushion assembly of this utility model interference-presses the support bushing into the connecting bracket. The two support bushings are paired together to increase the axial stiffness of the suspension assembly and improve the system's load-bearing capacity. During actual operation, the two bushings communicate with each other to provide mutual limiting protection, preventing the rubber from being damaged by extreme axial pulling forces.

[0013] Furthermore, the inner core comprises an upper connecting inner core and a lower connecting inner core, the bearing portions of which are provided with concave and convex joint surfaces, thereby splicing the upper and lower connecting inner cores into a single piece. The inner core is composed of two separate upper and lower connecting inner cores, which are respectively interference-pressed into the supporting bushing. The top of the inner core has a protrusion that can lock the rubber together, not only achieving a tight fit with the rubber to prevent deformation caused by pulling after pressing in, but also improving the resistance of the rubber to radial deformation, thereby increasing the radial stiffness of the product.

[0014] Furthermore, the connecting bracket includes an internal accommodating hole and a fixed surface set in the center, and the fixed surface supports the internal accommodating hole; the internal accommodating hole includes a top arm enclosed on the outside of the internal accommodating hole and consistent with the arc bending direction of the internal accommodating hole, and the top arm extends to both sides along the cross-sectional direction of the internal accommodating hole, and is integrated with the fixed surface.

[0015] Furthermore, the stop portion is a circular wall plate with a thickness gradually changing from the bearing portion to both sides, and the outer diameter of the circular wall plate is larger than the diameter of the internal accommodating hole of the connecting bracket.

[0016] Furthermore, the bearing portion includes end face 1 connected to the stop portion by a transition arc; end face 2 of the bearing portion away from one end of the stop portion, and a bearing portion body connecting end face 1 and end face 2; the outer diameter of end face 2 is larger than the outer diameter of the bearing portion body.

[0017] Furthermore, the concave-convex mating surfaces at the two end faces are positioned to form a projection and groove, and the upper and lower connecting cores are locked and connected via elastic pins. Pressing the elastic pins into the upper and lower connecting cores, respectively, secures the relative position of the two cores, preventing them from shifting during the press-in process and preventing them from coming apart before vehicle assembly. Locating pins and holes are provided on each core to ensure mutual positioning during assembly.

[0018] Furthermore, a weight-reducing mounting hole is provided on the side arm surface of the connecting bracket; and a weight-reducing groove concave inward from the surface is provided on the connecting bracket.

[0019] Furthermore, the connecting bracket and the inner core are made of any one of 45 steel, 40Cr carbon steel or YL112 aluminum alloy; the supporting bushing is made of stamping steel or aluminum.

[0020] Another object of the present utility model is to disclose an auxiliary battery system using the above-mentioned auxiliary battery support cushion assembly, wherein the fixing surface of the connecting bracket is connected to the auxiliary battery assembly and is respectively arranged between the frame beam and the frame crossbeam and the auxiliary battery assembly.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] This utility model proposes an auxiliary battery support cushion assembly. Based on the fact that pure electric heavy-duty truck battery systems are generally divided into two systems: the power battery and the auxiliary battery, this utility model innovatively proposes a dedicated vibration-damping cushion structure based on the structural characteristics of the auxiliary battery system. This cushion structure not only connects the vehicle frame and the auxiliary battery, but also has the following functions:

[0023] The reliability of the suspension system itself is improved. The support bushings are installed in pairs, which can effectively bear impacts in all directions. The rubber is mainly deformed by compression. At the same time, the support bushings and the connecting inner core adopt an interference fit instead of vulcanization. The rubber can withstand a larger deformation range, further improving the service life of the product.

[0024] Improved vibration isolation characteristics of the battery system. Designed stiffness based on the weight and structural characteristics of the auxiliary battery effectively attenuates impact damage to the power battery and protects efficient battery operation.

[0025] Each part of the product can be disassembled and replaced. If a part fails, it can be directly disassembled and replaced with a new part, which is convenient for assembly and improves the utilization rate of the whole part.

[0026] In summary, the vibration reduction system for the auxiliary battery of the present invention is specially designed and matched for the new energy auxiliary battery system, has high reliability and is easy to assemble; and has broad market prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the overall structure of the auxiliary battery support cushion assembly described in the present utility model.

[0028] Figure 2 This is a schematic diagram of the assembly of the auxiliary battery support cushion assembly described in the present utility model.

[0029] Figure 3 This is a schematic structural diagram of the inner core of the auxiliary battery support cushion assembly described in the present utility model.

[0030] Figure 4 This is a schematic diagram of the assembly structure of the inner core of the auxiliary battery support cushion assembly described in the present invention.

[0031] Figure 5 This is a structural schematic diagram of the AA direction cross section of the auxiliary battery support cushion assembly described in the present invention.

[0032] Figure 6 This is a structural schematic diagram of the auxiliary battery system of the auxiliary battery support cushion assembly described in the present utility model.

[0033] Among them, 1-connecting bracket, 11-internal accommodating hole, 12-fixing surface, 121-top arm, 122-side arm surface, 123-weight reduction mounting hole, 2-upper connecting inner core, 21-stop part, 22-bearing part, 23-transition arc, 24-through hole 1, 25-center hole, 3-support bushing, 31-rubber body, 32-outer jacket, 4-lower connecting inner core, 5-elastic pin, 6-auxiliary battery assembly, 7-frame beam, 8-frame crossbeam. DETAILED DESCRIPTION

[0034] The present invention is further described below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are schematic, not actual, representations. They should not be construed as limiting this patent. To better illustrate the embodiments of the present invention, some components may be omitted, enlarged, or reduced in size, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted from the accompanying drawings. Example 1

[0035] like Figures 1-6 As shown, the auxiliary battery support cushion assembly in this embodiment includes a connecting bracket 1 and a main rubber vibration damping unit installed inside the connecting bracket 1. The main rubber vibration damping unit includes an inner core disposed on both sides. The inner core includes an upper connecting inner core 2 and a lower connecting inner core 4. The bearing parts of the upper connecting inner core 2 and the lower connecting inner core 4 are provided with concave and convex joint surfaces, so that the upper connecting inner core 2 and the lower connecting inner core 4 are spliced ​​into one.

[0036] The outer edge of the inner core is provided with a stopper 21 and a load-bearing portion 22 extending inward from the outside. A cavity is formed between the inner core and the connecting bracket 1 to accommodate a support bushing 3. The support bushing 3 is installed separately and is interference-pressed into the connecting bracket 1. The support bushing 3 comprises a rubber body 31 and an outer sleeve 32. The outer sleeve 32 is in contact with the inner wall of the connecting bracket 1, and the rubber body 31 is engaged with the outer edge of the inner core. This improves the axial stiffness of the suspension assembly and enhances the load-bearing capacity of the system. The support bushing 3 forms an undercut fit with the lower connecting inner core 4 and the upper connecting inner core 2 via a convex circle.

[0037] The connecting bracket 1 in this embodiment includes a centrally located internal receiving hole 11 and a fixing surface 12, which supports the internal receiving hole 11. The internal receiving hole 11 includes a top arm 121 that surrounds the external portion of the internal receiving hole 11 and aligns with the internal receiving hole's curved shape. Side arm surfaces 122 extend from the top arm 121 along the cross-sectional plane of the internal receiving hole 11, forming a single unit that encloses the fixing surface 12. The top of the connecting bracket 1 is designed to be curved, aligning with the shape of the main rubber vibration damping unit within, effectively securing the internal structure and optimizing the overall assembly's material usage, resulting in high space utilization during assembly. The fixing surface 12 is narrow at the top and wide at the bottom, enhancing installation stability. The connecting bracket 1 in this embodiment has a triangular structure. To fully consider the overall performance of the auxiliary battery support cushion assembly, reinforcing ribs are provided at the two bottom corners of the triangle. Weight-reducing grooves, recessed inward from the surface, are located on either side of the ribs. The side arm surfaces 122 of the connecting bracket 1 are provided with weight-reducing mounting holes 123, which allow the entire connecting bracket 1 to be mounted on the auxiliary battery assembly 6.

[0038] like Figure 5As shown, the stopper 21 is a circular wall with a gradually decreasing thickness from the support portion 22 to the sides. The outer diameter of the circular wall is larger than the diameter of the internal receiving hole 11 of the connecting bracket 1. The support portion 22 includes an end face 1 connected to the stopper 21 by a transition arc 23; an end face 2 of the support portion 22 at one end away from the stopper 21; and a support portion body connecting the end faces 1 and 2. The outer diameter of the end face 2 is larger than the outer diameter of the support portion body. The concave-convex joint surface at the end face 2 is a convex-convex joint that fits the locating block and groove. The upper connecting core 2 and the lower connecting core 4 are locked and fixed together by an elastic pin 5.

[0039] In this embodiment, the connecting bracket 1 and the inner core are made of any one of 45 steel, 40Cr carbon steel or YL112 aluminum alloy; the supporting bushing 3 is made of stamping steel or aluminum.

[0040] like Figure 6 The auxiliary battery system of the auxiliary battery support cushion assembly shown is connected to the auxiliary battery assembly 6 by the connecting bracket 1 during assembly, and is respectively arranged between the frame beam 7 and the frame cross beam 8 and the auxiliary battery assembly 6, totaling three-point connection; according to the layout requirements of the battery system, it can also be directly connected between the frame beam 7 and the auxiliary battery, with a four-point connection; the elastic pin 5 realizes the locking and fixing connection of the upper connecting core 2 and the lower connecting core 4 to form a whole; further, the upper connecting core 2 and the lower connecting core 4 communicate with each other and are connected to the frame end.

[0041] In this embodiment, the upper connecting core 2 and the lower connecting core 4 are provided with a central hole 25 for receiving an elastic pin 5 in the center. A pair of larger through-holes 1 24 are symmetrically arranged around the central hole, with their centers coinciding, to secure the upper connecting core 2 and the lower connecting core 4 together. Furthermore, a pair of smaller through-holes 2 are provided in the connecting core 2 or the lower connecting core 4, and a pair of corresponding raised locating pins are provided in the lower connecting core 4 or the connecting core 2, thereby forming a relatively secure internal fit between the concave and convex joints.

[0042] As another implementation method, connection with different hole positions can be achieved by designing different bracket structures, such as connecting bracket 1 to 4 mounting holes or changing the distance between the holes to fine-tune the external structure; the hole position of the inner core can also be changed to one hole or multiple holes.

[0043] As another implementation method, a partition is added in the middle of the rubber body 2 or the thickness of the rubber body is increased or decreased, which can also be used for different car models.

[0044] As another implementation method, the inner core structure may be changed, for example, to an elliptical structure.

[0045] The utility model proposes an auxiliary battery support cushion assembly. Based on the fact that the battery system of a pure electric heavy truck is generally divided into two systems, namely the power battery and the auxiliary battery, the utility model innovatively proposes a special vibration-damping cushion structure in response to the structural characteristics of the auxiliary battery system. The structure can connect the vehicle frame and the auxiliary battery, thereby improving the reliability of the suspension system itself. The structure adopts a supporting bushing pairing method, which can effectively bear impacts in all directions, and the rubber is mainly deformed by compression. At the same time, the supporting bushing and the connecting inner core adopt an interference fit rather than vulcanization, so the rubber can withstand a larger deformation range, further improving the service life of the product. The vibration isolation characteristics of the battery system are improved, and the design stiffness is configured according to the weight and structural characteristics of the auxiliary battery, which can effectively attenuate the impact damage to the power battery and protect the efficient operation of the battery. The various parts of the product can be disassembled and replaced. In the event of local failure, it can be directly disassembled and replaced with a new part, which is convenient for assembly and improves the utilization rate of the entire part.

[0046] The above is only an embodiment of the present invention. The present invention is not limited to the field involved in this implementation case. Common knowledge such as the specific structure and characteristics of the scheme is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the content of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An auxiliary battery support cushion assembly, comprising a connecting bracket (1) and a main rubber vibration damping unit installed inside the connecting bracket (1), characterized in that: The main rubber vibration damping unit comprises an inner core disposed on both sides, wherein the outer edge of the inner core is provided with a stop portion (21) and a bearing portion (22) extending from the outside to the inside; a cavity for accommodating a supporting bushing (3) is formed between the inner core and the connecting bracket (1), and the supporting bushing (3) is disposed in pairs, thereby increasing the axial stiffness of the suspension assembly and improving the bearing capacity of the system.

2. The auxiliary battery support cushion assembly according to claim 1, characterized in that: The supporting bushing (3) is interference-pressed into the connecting bracket (1). The supporting bushing (3) comprises a rubber body (31) and an outer sleeve (32). The outer sleeve (32) fits the inner wall of the connecting bracket (1), and the rubber body (31) fits the outer edge of the inner core.

3. The auxiliary battery support cushion assembly according to claim 1, characterized in that: The inner core comprises an upper connecting inner core (2) and a lower connecting inner core (4); the bearing parts of the upper connecting inner core (2) and the lower connecting inner core (4) are provided with concave and convex joint surfaces, so that the upper connecting inner core (2) and the lower connecting inner core (4) are spliced ​​into one body.

4. The auxiliary battery support cushion assembly according to claim 3, characterized in that: The connecting bracket (1) comprises an internal accommodating hole (11) and a fixing surface (12) arranged in the center, wherein the fixing surface supports the internal accommodating hole (11); the internal accommodating hole (11) comprises a top arm (121) enclosed outside the internal accommodating hole (11) and in the same direction as the arc curvature of the internal accommodating hole; the top arm (121) extends to both sides along the direction of the cross section of the internal accommodating hole (11) to form a whole with side arm surfaces (122) enclosing the fixing surface (12).

5. The auxiliary battery support cushion assembly according to claim 4, characterized in that: The stop portion (21) is a circular wall plate with a thickness gradually changing from the bearing portion (22) to both sides, and the outer diameter of the circular wall plate is larger than the diameter of the internal accommodating hole (11) of the connecting bracket (1).

6. The auxiliary battery support cushion assembly according to claim 5, characterized in that: The bearing portion (22) comprises an end face 1 connected to the stop portion (21) by a transition arc (23); an end face 2 of the bearing portion (22) away from one end of the stop portion (21); and a bearing portion body connecting the end face 1 and the end face 2; the outer diameter of the end face 2 is greater than the outer diameter of the bearing portion body.

7. The auxiliary battery support cushion assembly according to claim 6, characterized in that: The concave-convex joint surfaces at the two end faces are positioned and matched with a convex block and a concave groove, and the upper connecting inner core (2) and the lower connecting inner core (4) are locked and fixedly connected via an elastic pin (5).

8. The auxiliary battery support cushion assembly according to claim 6, characterized in that: The side arm surface (122) of the connecting bracket (1) is provided with a weight-reducing mounting hole (123); and the connecting bracket (1) is provided with a weight-reducing groove that is concave inward from the surface.

9. The auxiliary battery support cushion assembly according to any one of claims 1 to 8, characterized in that: The connecting bracket (1) and the inner core are made of any one of 45 steel, 40Cr carbon steel or YL112 aluminum alloy; the supporting bushing (3) is made of stamping steel or aluminum.

10. An auxiliary battery system using the auxiliary battery support cushion assembly according to any one of claims 1 to 8, characterized in that: The fixing surface (12) of the connecting bracket (1) is connected to the auxiliary battery assembly (6) and is respectively arranged between the vehicle frame beam (7) and the vehicle frame cross beam (8) and the auxiliary battery assembly (6).

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