Balance shaft end cover support and balance shaft assembly

Abstract

A balance shaft end cover support and a balance shaft assembly belong to the technical field of vehicle suspensions, the balance shaft end cover support comprises an installation fixing part and a supporting part which are fixedly connected, use is facilitated, a plurality of reinforcing ribs are fixedly arranged on the end face of the installation fixing part, the overall rigidity and deformation resistance of the installation fixing part can be enhanced, and the supporting part is of a hollow conical structure. The supporting part is arranged on the base, materials are saved, the overall weight is reduced, the stepped hole channel used for installing the balance shaft is formed in the supporting part, the requirement of the stepped hole channel for the machining precision of the hole diameter is low, and the installing and positioning precision and stability of the balance shaft are improved conveniently; vibration and impact generated in the running process of a vehicle can be conveniently absorbed and buffered through the conical rubber bearing, and the balance shaft end cover support is used for assisting the balance shaft in force transmission.

Description

Technical Field

[0001] This utility model relates to the field of vehicle suspension technology, and in particular to a balance shaft end cover bracket and balance shaft assembly. Background Technology

[0002] The articulated dump truck suspension system includes a balance beam and a balance shaft. The balance shaft is connected to the frame, and the balance beam is movably connected to the balance shaft. The two ends of the balance beam are connected to the front and rear axles. When the balance shaft and balance beam work together, the balance beam can swing around the balance shaft when the vehicle is driving on uneven roads or when the vehicle load changes, thereby ensuring the load balance between the two axles.

[0003] The balance shaft is generally connected to the longitudinal beam of the vehicle frame through a mounting bracket. The mounting bracket of the balance shaft consists of a fixed bracket and an end cap (such as publication number CN220281070U). The fixed bracket and the end cap are fixedly connected by bolts or welding. The balance shaft directly contacts the balance beam through a bearing, avoiding direct contact between the balance beam and the balance shaft, thereby reducing wear on the balance beam and the balance shaft.

[0004] Existing balance shaft mounting brackets have complex overall structures, are heavy, and are modular, making assembly and use inconvenient. They also have poor overall strength and rigidity. The brackets have through-hole structures, requiring high machining precision. Gaps can easily exist between the bracket and the balance shaft, compromising the stability of the connection between the balance shaft and the bracket. This makes the balance shaft prone to displacement or loosening during vehicle operation. Furthermore, the mounting brackets are mostly used individually, which cannot guarantee the even distribution of force on the balance shaft. The brackets are also prone to deformation and damage due to localized stress concentration. Utility Model Content

[0005] To address the technical problems of existing balance shaft mounting brackets being modular and inconvenient to install and use, and having poor overall strength and rigidity, this utility model provides a balance shaft end cap bracket.

[0006] The technical solution of this utility model is as follows:

[0007] This utility model provides a balance shaft end cover bracket, including a mounting and fixing part. The mounting and fixing part is a plate-shaped structure with several bolt holes, which facilitates connection to the vehicle frame via bolts. A support part is fixedly provided on one end face of the mounting and fixing part, and several reinforcing ribs are fixedly provided on the other end face of the mounting and fixing part, which can enhance the overall rigidity and deformation resistance of the mounting and fixing part, while optimizing the load distribution, reducing local stress concentration, and extending its service life. The support part is a hollow conical structure, which helps to save materials and reduce the overall weight. The interior of the support part has stepped channels for installing the balance shaft. The stepped channels have low requirements for the machining accuracy of the hole diameter, which facilitates the improvement of the installation positioning accuracy and stability of the balance shaft. The exterior of the support part has a first connecting surface for installing a conical rubber bearing, which facilitates the absorption and buffering of vibrations and impacts generated during vehicle operation by the conical rubber bearing. The balance shaft end cover bracket assists the balance shaft in force transmission, which improves the smoothness and driving comfort of the vehicle, while avoiding direct contact between the balance shaft and the balance beam, effectively protecting the balance shaft and improving its service life.

[0008] Preferably, the support and the mounting and fixing parts are coaxially arranged, which ensures the symmetry and stability of the components and makes the balance shaft more evenly stressed during operation. The mounting and fixing parts and the support are integrally formed, which not only facilitates use but also enhances the connection strength between the support and the mounting and fixing parts, reduces the risk of failure caused by loose connection parts, and improves the reliability of the overall structure.

[0009] Preferably, the mounting and fixing part has a first bolt hole at its center for mounting a center bolt, which facilitates the positioning and connection of the balance shaft and balance shaft end cover bracket by the center bolt, thereby enhancing the overall stability. The mounting and fixing part has several second bolt holes and third bolt holes on its periphery, which makes the connection between the mounting and fixing part and other components tighter and adaptable to different installation scenarios and stress requirements.

[0010] Preferably, the reinforcing ribs form an installation groove around the first bolt hole, which can provide space for the accessories of the center bolt (such as self-locking nuts and threaded plate blocks), play a role in positioning and protection, prevent the accessories from shifting or falling off during use, and also further strengthen the structure around the first bolt hole.

[0011] Preferably, the stepped channel includes a coaxial first shaft mounting hole and a second shaft mounting hole. The first shaft mounting hole is located at the open end of the support and has a circular hole structure. The second shaft mounting hole has a tapered hole structure, and the diameter of the second shaft mounting hole gradually decreases towards the mounting and fixing part. The circular hole structure of the first shaft mounting hole facilitates the insertion and initial positioning of one end of the balance shaft. The tapered hole structure of the second shaft mounting hole is adapted to the shape of the balance shaft, which can better hold and position the balance shaft, ensuring the accuracy and stability of the balance shaft installation and making the balance shaft less prone to shaking during operation.

[0012] Preferably, the diameter of the first shaft mounting hole is the same as the maximum diameter of the second shaft mounting hole, which ensures that the balance shaft can pass smoothly through the two shaft mounting holes during installation, avoiding installation difficulties caused by diameter differences. It also facilitates the transition and positioning of the balance shaft during installation, improving installation efficiency.

[0013] This utility model also provides a balance shaft assembly, including: a balance shaft and two balance shaft end cap brackets. The two balance shaft end cap brackets are arranged opposite each other and sleeved and fixed to the outside of the balance shaft. A central bolt connects the two first bolt holes, passing through the balance shaft. One end of the central bolt is threadedly connected to a self-locking nut, and the other end is threadedly connected to a threaded plate stop. A tapered rubber bearing is installed on the first connecting surface of each balance shaft end cap bracket, ensuring a tight connection and stability between the balance shaft body and the balance shaft end cap bracket. The paired balance shaft end cap brackets provide double support, distributing the load, reducing the pressure on a single bracket, and improving overall stability and durability. The mating structure allows the force on the balance shaft to be evenly distributed to the two balance shaft end cap brackets, avoiding local stress concentration and reducing the risk of deformation and damage to the balance shaft end cap brackets. Through the combination of the central bolt and the mating brackets (stepped hole mating), the balance shaft body is firmly fixed, preventing displacement or loosening during vehicle operation. The force from the balance shaft is evenly distributed to the vehicle frame, avoiding local stress concentration and improving the overall durability of the suspension system.

[0014] Preferably, the self-locking nut and the screw plate stop are placed in the mounting groove on the corresponding mounting and fixing part to play a positioning and protection role, preventing them from being displaced or falling off due to vibration or other reasons during vehicle operation, ensuring the stability of the center bolt connection, and thus ensuring the overall stability of the balance shaft assembly.

[0015] Preferably, there is a set gap between the two balance shaft end cap brackets, which can effectively avoid direct contact and friction between the two balance shaft end cap brackets, thereby reducing wear and extending service life. At the same time, the gap allows the two balance shaft end cap brackets to have sufficient freedom when under force, avoiding mutual interference and deformation.

[0016] As can be seen from the above technical solutions, the advantages of this utility model are:

[0017] 1. The mounting and fixing parts are fixedly connected as a single structure, which facilitates use. Several reinforcing ribs are fixed on the end face of the mounting and fixing parts, which can enhance the overall rigidity and deformation resistance of the mounting and fixing parts, while optimizing the load distribution, reducing local stress concentration, and extending its service life. The support part is a hollow conical structure, which helps to save materials and reduce the overall weight. The interior of the support part has stepped channels for installing the balance shaft. The stepped channels have low requirements for the machining accuracy of the hole diameter, which facilitates the improvement of the installation positioning accuracy and stability of the balance shaft. The exterior of the support part has a first connecting surface for installing tapered rubber bearings, which facilitates the absorption and buffering of vibrations and impacts generated during vehicle operation. The balance shaft end cover bracket assists the balance shaft in force transmission. While improving the smoothness and driving comfort of the vehicle, it also avoids direct contact between the balance shaft and the balance beam, effectively protecting the balance shaft and improving its service life.

[0018] 2. The stepped channel includes a coaxial first shaft mounting hole and a second shaft mounting hole. The first shaft mounting hole is located at the open end of the support and has a circular hole structure. The second shaft mounting hole has a tapered hole structure, and the diameter of the second shaft mounting hole gradually decreases towards the mounting and fixing part. The circular hole structure of the first shaft mounting hole facilitates the insertion and initial positioning of one end of the balance shaft. The tapered hole structure of the second shaft mounting hole is adapted to the shape of the balance shaft, which can better hold and position the balance shaft, ensuring the accuracy and stability of the balance shaft installation and making the balance shaft less prone to shaking during operation.

[0019] 3. The paired balance shaft end cap brackets provide dual support, distributing the load and reducing the pressure on a single bracket, thus improving overall stability and durability. The mating structure allows the force on the balance shaft to be evenly distributed across the two balance shaft end cap brackets, avoiding localized stress concentration and reducing the risk of deformation and damage to the balance shaft end cap brackets. Through the combination of the center bolt and the mating bracket (stepped hole mating), the balance shaft body is firmly fixed, preventing displacement or loosening during vehicle operation. This evenly distributes the force from the balance shaft onto the frame, avoiding localized stress concentration and improving the overall durability of the suspension system.

[0020] 4. There is a set gap between the two balance shaft end cover brackets, which can effectively avoid direct contact and friction between the two balance shaft end cover brackets, thereby reducing wear and extending service life. At the same time, the gap allows the two balance shaft end cover brackets to have sufficient freedom when under force, avoiding mutual interference and deformation. Attached Figure Description

[0021] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional structural diagram of the balance shaft end cap bracket according to one or more embodiments of the present invention. Figure 1 ;

[0023] Figure 2 This is a three-dimensional structural diagram of the balance shaft end cap bracket according to one or more embodiments of the present invention. Figure 2 ;

[0024] Figure 3 This is a cross-sectional structural diagram of the balance shaft assembly of the present invention in use according to one or more embodiments;

[0025] The components represented by the various reference numerals in the diagram are:

[0026] 1. Mounting and fixing part; 2. Reinforcing rib; 3. First bolt hole; 4. Second bolt hole; 5. Third bolt hole; 6. Support part; 7. First shaft mounting hole; 8. Second shaft mounting hole; 9. First connecting surface; 10. Second connecting surface; 11. Mounting groove; 12. Screw plate stop; 13. Balance shaft; 14. Self-locking nut; 15. Center bolt; 16. Tapered rubber bearing; 17. Balance beam; 18. Bushing. Detailed Implementation

[0027] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0028] Example 1

[0029] In a typical embodiment of this utility model, such as Figures 1-2As shown, a balance shaft end cap bracket is proposed, including: a mounting and fixing part 1 and a support part 6. The mounting and fixing part 1 is a plate-shaped structure with several bolt holes, which is fixedly connected to the balance beam support on the frame by bolts. The support part 6 is fixedly disposed on one end face of the mounting and fixing part 1. The support part 6 is coaxially arranged with the mounting and fixing part 1. The inside of the support part 6 is used to install the balance shaft 13, and the outside of the support part 6 is used to install the tapered rubber bearing 16, which is connected to the balance beam 17 by the tapered rubber bearing 16. In this embodiment, the mounting and fixing part 1 and the support part 6 are integrally formed casting structures, which do not require assembly and reduce the stress concentration problem that may occur during the welding process, thereby enhancing the overall strength and rigidity.

[0030] Specifically, such as Figure 1 As shown, the mounting and fixing part 1 is a plate-shaped structure. One end face of the mounting and fixing part 1 is fixedly connected to the support part 6. Several reinforcing ribs 2 are fixedly provided on the other end face of the mounting and fixing part 1 to significantly enhance the overall rigidity and deformation resistance of the mounting and fixing part 1, while optimizing the load distribution, reducing local stress concentration, and extending its service life. The mounting and fixing part 1 is provided with several bolt holes, which are divided into first bolt holes 3, second bolt holes 4, and third bolt holes 5. There is one first bolt hole 3, which is located at the center of the mounting and fixing part 1 and communicates with the interior of the support part 6 for the installation of the center bolt 15. There are several second bolt holes 4, which are distributed around the periphery of the mounting and fixing part 1 for the installation of fixing bolts. The fixing bolts are used to fix the part to the balance beam support on the frame. There are several third bolt holes 5, which are close to the second bolt holes 4 to reduce the stress near the second bolt holes 4 and avoid stress concentration and cracking.

[0031] The reinforcing ribs 2 on the end face of the mounting and fixing part 1 form a mounting groove 11 around the first bolt hole 3 for the installation of the self-locking nut 14 and the threaded plate stop 12, so as to protect the threaded plate stop 12 and the self-locking nut 14 from being exposed and damaged, thereby reducing maintenance costs.

[0032] like Figure 2As shown, the support part 6 is a hollow conical structure, which not only reduces the weight of the bracket but also optimizes the structural strength. The support part 6 has a stepped channel inside for installing and positioning the balance shaft 13. The stepped channel includes a first shaft mounting hole 7 and a second shaft mounting hole 8. The first shaft mounting hole 7 and the second shaft mounting hole 8 are coaxially arranged. The first shaft mounting hole 7 is located at the open end of the support part 6 (i.e., the end of the support part 6 away from the mounting and fixing part 1). The first shaft mounting hole 7 is a circular hole structure with a uniform arc surface. The second shaft mounting hole 8 is a conical hole structure with a tapered surface that varies in diameter. The diameter of the first shaft mounting hole 7 is the same as the maximum diameter of the second shaft mounting hole 8. The diameter of the second shaft mounting hole 8 gradually decreases towards the mounting and fixing part 1. The first shaft mounting hole 7 facilitates the installation of the balance shaft 13, and the setting of the second shaft mounting hole 8 ensures the installation accuracy of the balance shaft 13.

[0033] The outer wall of the support part 6 includes two connecting surfaces, namely a first connecting surface 9 and a second connecting surface 10. The first connecting surface 9 is a tapered surface for connecting with the tapered rubber shaft 16, and the second connecting surface 10 is a uniform arc-shaped surface for connecting with the balance beam support on the frame.

[0034] Example 2

[0035] In another typical embodiment of this utility model, such as Figure 3 As shown, a balance shaft assembly is proposed, including: a balance shaft 13 and two balance shaft end cap brackets. The two balance shaft end cap brackets are arranged opposite each other and are sleeved on the outside of the balance shaft 13. The balance shaft end cap brackets and the balance shaft 13 are transitionally fitted. The first bolt holes 3 on the two balance shaft end cap brackets are connected by a central bolt 15. The central bolt 15 passes through the inside of the balance shaft 13. One end of the central bolt 15 is threadedly connected to a self-locking nut 14, and the other end of the central bolt 15 is threadedly connected to a threaded plate stop 12, so as to achieve the limiting and fixing of the balance shaft 13 through the cooperation of the balance shaft end cap brackets and the central bolt 15. A tapered rubber bearing 16 is installed on the first connecting surface 9 of each balance shaft end cap bracket, so as to connect to the balance beam 17 through the tapered rubber bearing 16. The mounting and fixing part 1 is fixedly connected to the balance beam support on the frame by fixing bolts.

[0036] The balance shaft end cap brackets are used in pairs. The tapered first connecting surface 9 is used to install the tapered rubber bearing 16. Utilizing the elasticity and shock absorption characteristics of the rubber material, it can effectively absorb and buffer the vibration and impact generated during vehicle operation, which can greatly improve the smoothness and driving comfort of the vehicle. The tapered surface of the second shaft mounting hole 8 inside the balance shaft end cap bracket holds the balance shaft 13 shaft. The two balance shaft end cap brackets are fixed by docking. With the use of the center bolt 15, the loosening of the balance shaft 13 can be effectively restricted. During installation, there is a set gap between the two balance shaft end cap brackets, which can effectively avoid direct contact and friction between the two balance shaft end cap brackets, thereby reducing wear and extending service life. At the same time, the gap allows the two balance shaft end cap brackets to have sufficient freedom under force, avoiding mutual interference and deformation.

[0037] To improve service life, a bushing 18 is provided between the tapered rubber bearing 16 and the balance beam 17. The bushing 18 is fitted on the outside of the two tapered rubber bearings 16 to reduce the wear of the balance beam 17.

[0038] The self-locking nut 14 and the threaded plate stop 12 are both placed in the mounting groove 11 on the end face of the corresponding mounting and fixing part 1 to hide the threaded plate stop 12 and the self-locking nut 14, so as to prevent the threaded plate stop 12 and the self-locking nut 14 from being exposed and damaged.

[0039] In an articulated truck suspension system, the balance shaft 13 is connected to two mating balance shaft end cap brackets. A center bolt 15 secures the balance shaft 13 through the first bolt hole 3 on the mounting and fixing part 1. The balance shaft end cap brackets are used in pairs, installed on both sides of the vehicle frame. The two brackets are mated to form a single structure, clamping and fixing the balance shaft 13. The center bolt 15 passes through the balance shaft 13, firmly securing it to the balance shaft end cap brackets. This method ensures a tight connection and stability between the balance shaft 13 and the balance shaft end cap brackets. The paired balance shaft end cap brackets provide double support, distributing the load, reducing the pressure on a single bracket, and improving overall stability and durability. The mating structure allows the force on the balance shaft to be evenly distributed across the two balance shaft end cap brackets, avoiding localized stress concentration and reducing the risk of deformation and damage to the balance shaft end cap brackets. By combining the center bolt 15 and the docking bracket (stepped hole docking), the balance shaft 13 is firmly fixed, preventing displacement or loosening during vehicle operation. This distributes the force from the balance shaft 13 evenly onto the frame, avoiding localized stress concentration and improving the overall durability of the suspension system.

[0040] The balance shaft end cap bracket is bolted to the balance beam support of the vehicle frame, serving to connect the frame and the suspension system. This connection method uses bolts to firmly fix the balance shaft end cap bracket to the balance beam support of the frame, ensuring the stability and reliability of the balance shaft and suspension system. The balance shaft end cap bracket provides stable support for the balance shaft 13 and the suspension system, ensuring that they maintain the correct position during vehicle operation and do not shift or loosen. Through bolt fixing, the bracket evenly transmits the forces from the balance shaft 13 and the suspension system to the frame, ensuring uniform and stable stress distribution throughout the system. The balance shaft end cap bracket, connected to the balance beam support of the frame by bolts, serves to connect the frame and the suspension system, ensuring the normal operation of the suspension system. The balance shaft end cap bracket can disperse and reduce the transmission of impact forces, protecting the frame and other components of the suspension system.

[0041] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A balance shaft end cover bracket, comprising: The mounting and fixing part (1) is characterized in that the mounting and fixing part (1) is a plate-shaped structure provided with a plurality of bolt holes, a support part (6) is fixedly arranged on one end face of the mounting and fixing part (1), a plurality of reinforcing ribs (2) are fixedly arranged on the other end face of the mounting and fixing part (1), the support part (6) is a hollow conical structure, a stepped hole is arranged in the support part (6) and used for mounting a balance shaft (13), and a first connecting face (9) is arranged on the outside of the support part (6) and used for mounting a conical rubber bearing (16).

2. The balance shaft end cover bracket of claim 1, wherein, The support part (6) is coaxially arranged with the mounting and fixing part (1), and the mounting and fixing part (1) and the support part (6) are an integral molding structure.

3. The balance shaft end cover bracket of claim 2, wherein, A first bolt hole (3) used for mounting a center bolt (15) is arranged at the center position of the mounting and fixing part (1), and a plurality of second bolt holes (4) and third bolt holes (5) are arranged on the circumferential side of the mounting and fixing part (1).

4. The balance shaft end cover bracket of claim 3, wherein, The reinforcing ribs (2) surround the first bolt hole (3) to form a mounting groove (11).

5. The balance shaft end cover bracket of claim 1, wherein, The stepped hole includes coaxial first shaft body mounting holes (7) and second shaft body mounting holes (8), the first shaft body mounting holes (7) are located at the opening end of the support part (6), the first shaft body mounting holes (7) are circular hole structures, the second shaft body mounting holes (8) are conical hole structures, and the diameter of the second shaft body mounting holes (8) gradually decreases towards the direction close to the mounting and fixing part (1).

6. The balance shaft end cover bracket of claim 5, wherein, The diameter of the first shaft body mounting holes (7) is the same as the maximum diameter of the second shaft body mounting holes (8).

7. A balance shaft assembly characterized by, The balance shaft (13) and two balance shaft end cover supports according to any one of claims 1-6 are arranged in opposition and are fixedly sleeved on the outside of the balance shaft (13), the center bolt (15) is connected between the two first bolt holes (3) and passes through the balance shaft (13), one end of the center bolt (15) is threadedly connected with the self-locking nut (14), the other end of the center bolt (15) is threadedly connected with the wire plate stopper (12), and one conical rubber bearing is arranged on the first connecting face (9) of each balance shaft end cover support. The self-locking nut (14) and the wire plate stopper (12) are arranged in the mounting groove (11) on the corresponding mounting and fixing part (1).

8. The balance shaft assembly of claim 7, wherein, The two balance shaft end cover supports have a gap therebetween.

9. The balance shaft assembly of claim 7, wherein, ​

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