An electric power steering pump bracket

Abstract

The utility model discloses a kind of electric power steering pump support, which belongs to the technical field of automobile steering system. It mainly includes electric power steering pump and longitudinal beam support, electric power steering pump is fixedly connected with longitudinal beam support by mounting bracket, mounting bracket includes U-shaped frame, support assembly is fixedly connected between the two sides of U-shaped frame, assembly hole for being connected with longitudinal beam support is opened on U-shaped frame, the upper part of the two sides of U-shaped frame is respectively provided with rigidity reinforcing rib, rigidity reinforcing rib is obliquely arranged to the side away from U-shaped frame, rigidity reinforcing rib and U-shaped frame middle part are respectively provided with power steering pump mounting hole for being connected with electric power steering pump. The utility model mounting bracket adopts U-shaped frame and rigidity reinforcing rib integrated, support assembly is locally reinforced, and stamping groove is matched to enhance torsional resistance, and the overall rigidity of mounting bracket is improved by multiple structures, effectively disperses force load, avoids stress concentration and bending deformation, and guarantees force transmission stability.

Description

Technical Field

[0001] This utility model belongs to the technical field of automotive steering systems, and more specifically, it relates to an electric power steering pump bracket. Background Technology

[0002] As a core power component of the automotive steering system, the electric power steering pump is primarily used to provide steering assistance, reducing the driver's hand strain. During use, the electric power steering pump is mainly fixed to the vehicle's frame or chassis via a mounting bracket. Therefore, the mounting bracket needs to be sufficiently robust to withstand the vibrations generated by the power steering pump during operation, thus providing fixation and bearing the corresponding vibrations. Currently, most brackets are cast structures. To ensure the rigidity and strength of the bracket, casting requires a large wall thickness, resulting in a heavy bracket and high cost. Furthermore, the overall molding of cast structures is complex, making development difficult and increasing mold costs.

[0003] Secondly, patent CN207481995U discloses a power steering pump mounting bracket for automobiles, including a bracket body longitudinally fixed to the vehicle body. The bracket body has a U-shaped cross-section. Two sets of U-shaped reinforcing support ribs with the same cross-sectional shape are fixed at intervals on the upper and lower sides of the inner side of the bracket body. A locking device mounting hole is opened on the side wall of the bracket body near one end of the U-shaped reinforcing support ribs. A locking device is installed in the locking device mounting hole. The locking device includes a pressure column that is movably engaged in the locking device mounting hole. The inner end of the pressure column extends inward between the two side walls of the bracket body, and a pressure head is vertically fixed to its end. A threaded through hole penetrating the pressure head is opened in the middle of the pressure column along its axial direction. This bracket has strong adaptability, realizing the installation and fixation of various types of power steering pumps, eliminating the installation gap of the power steering pump, and improving the NVH of the entire vehicle.

[0004] However, the above-mentioned bracket has the following shortcomings in use: 1. It relies on the moving clamping method of the pressure column and pressure head to adapt to different models of steering pumps. Among them, the square pressure head can only achieve unidirectional clamping and cannot restrict the rotation and radial offset of the steering pump in the plane, which can easily lead to the coaxiality deviation of the steering pump during operation, thus affecting the steering assist efficiency; 2. The structural strength and deformation resistance are insufficient. There is a lack of support between the U-shaped reinforcing support ribs, resulting in connection gaps and weak points. Under long-term stress, the support ribs are prone to fall off and the bracket body is prone to cracking; at the same time, during use, the bolt tightening force and the steering pump load are easily concentrated at the locking device mounting holes on the side wall of the bracket, which can easily cause the side wall to be squeezed and deformed. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an electric power steering pump bracket. The mounting bracket is integrally formed with a U-shaped frame and a rigidity reinforcing rib. The support component is locally reinforced with end semi-circular sleeves and middle circular tubes, and is combined with stamping grooves to enhance torsional resistance. The multi-structure synergy improves the overall rigidity of the mounting bracket, effectively disperses the force load, avoids stress concentration and bending deformation, and ensures stable force transmission.

[0006] The electric power steering pump bracket includes an electric power steering pump and a longitudinal beam bracket. The electric power steering pump is fixedly connected to the longitudinal beam bracket via a mounting bracket. The mounting bracket includes a U-shaped frame, and a support component is fixedly connected between the two sides of the U-shaped frame. The U-shaped frame has assembly holes for connecting with the longitudinal beam bracket. The upper parts of both sides of the U-shaped frame are respectively provided with stiffening ribs, which are inclined towards the side away from the U-shaped frame. The stiffening ribs and the middle part of the U-shaped frame are respectively provided with power steering pump mounting holes for connecting with the electric power steering pump.

[0007] Preferably, the U-shaped frame and the stiffening rib are integrally formed, and the side frame of the U-shaped frame and the corresponding stiffening rib are respectively provided with stamping grooves.

[0008] Preferably, the support assembly includes a first reinforcing sleeve and a second reinforcing sleeve. The first reinforcing sleeve has a semi-circular longitudinal section and is fixedly installed on the side frame of the U-shaped frame near the end. The second reinforcing sleeve has a circular tube structure and is fixedly installed on the side frame of the U-shaped frame near the middle.

[0009] Preferably, the assembly hole includes a bracket opening and a bracket mounting hole. The bracket opening penetrates the bottom of the U-shaped frame and corresponds to the first reinforcing sleeve, with the opening of the first reinforcing sleeve facing the bottom of the U-shaped frame. The bracket mounting hole is coaxially arranged with the second reinforcing sleeve.

[0010] Preferably, the U-shaped frame and stiffening ribs are formed by stamping 3.5-4mm aluminum alloy plates, and the support components are welded and fixed to the U-shaped frame.

[0011] Preferably, a rubber damping block and a power steering pump fixing bolt are provided between the electric power steering pump and the mounting bracket. The rubber damping block is set in the mounting hole of the power steering pump, and the power steering pump fixing bolt passes through the rubber damping block and the mounting bracket and is connected to the fixing seat bolt of the electric power steering pump.

[0012] Preferably, the mounting bracket is fixedly connected to the longitudinal beam bracket by bracket fixing bolts.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. The mounting bracket adopts a U-shaped frame and rigidity reinforcing ribs integrally formed. The support components are locally reinforced with end semi-circular sleeves and middle circular tubes, and are combined with stamping grooves to enhance torsional resistance. The multi-structure synergy improves the overall rigidity of the mounting bracket, effectively disperses the force load, avoids stress concentration and bending deformation, and ensures stable force transmission.

[0014] 2. The U-shaped frame and stiffening ribs are made of 3.5-4mm aluminum alloy sheet by stamping. While ensuring strength, the overall weight of the bracket is reduced, the vehicle load is reduced, and energy consumption is indirectly reduced, which meets the requirements of lightweight design. At the same time, the stiffening ribs enhance the dynamic stiffness of the mounting bracket in the main direction, avoid resonance, and improve the NVH performance of the bracket.

[0015] 3. The longitudinal beam bracket and the mounting bracket are positioned by double bolts. The bracket openings have dimensional tolerance to reduce assembly difficulty. The power booster pump adopts triangularly distributed mounting holes, combined with rubber shock absorbers to fill the gaps, which not only achieves rapid assembly, but also ensures the coaxiality of the power booster pump and the overall installation accuracy. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the disassembled structure of this utility model; Figure 3 A three-dimensional structural diagram of the mounting bracket; Figure 4 A schematic diagram of the bottom structure of the mounting bracket; Figure 5 This is a schematic diagram of the top structure for mounting the bracket.

[0017] In the diagram, 1. Electric power steering pump; 101. Power steering pump fixing bolt; 102. Rubber damping block; 2. Mounting bracket; 201. U-shaped frame; 2011. Stamping groove; 202. Bracket mounting hole; 203. Reinforcing sleeve one; 204. Bracket opening; 205. Rigidity reinforcing rib; 206. Power steering pump mounting hole; 207. Reinforcing sleeve two; 3. Longitudinal beam bracket; 4. Automobile longitudinal beam; 5. Bracket fixing bolt. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings: The directional terms used in the detailed description paragraphs are only for the convenience of those skilled in the art to understand the technical solutions described in this application based on the visual orientation shown in the accompanying drawings. Unless otherwise expressly specified and limited, the terms "setting," "installation," "connection," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] like Figures 1 to 5 As shown, an electric power steering pump bracket includes an electric power steering pump 1 and a longitudinal beam bracket 3. The electric power steering pump 1 is fixedly connected to the longitudinal beam bracket 3 via a mounting bracket 2. The electric power steering pump 1 is used to provide power assistance to the vehicle's steering system, reducing the driver's steering effort. In use, the longitudinal beam bracket 3 is fixedly connected to the vehicle's longitudinal beam 4 via bolts to provide a stable installation support reference. The mounting bracket 2 is a connecting transition piece, which adapts to the installation dimensions of the electric power steering pump 1 and the longitudinal beam bracket 3 to achieve precise docking and reliable fixation, ensuring the stability of the electric power steering pump 1 during vehicle operation.

[0020] like Figures 3 to 5 As shown, the mounting bracket 2 includes a U-shaped frame 201, which serves as the main frame of the entire mounting bracket 2, providing a mounting carrier for various components. The U-shaped structure also distributes stress, improving the overall stability of the mounting bracket 2. Support components are fixedly connected between the two sides of the U-shaped frame 201. These support components effectively prevent relative deformation of the two sides under stress or vibration, enhancing the torsional stiffness of the U-shaped frame 201. The U-shaped frame 201 has mounting holes for connecting with the longitudinal beam bracket 3. These mounting holes provide bolt insertion channels for the connection between the mounting bracket 2 and the longitudinal beam bracket 3, enabling detachable fixing of both. The upper portions of both sides of the U-shaped frame 201 are respectively provided with stiffening ribs 205. The stiffening ribs 205 are inclined away from the side of the U-shaped frame 201. By inclining, the stiffening ribs 205 enhance the dynamic stiffness of the mounting bracket 2 in the main direction, avoid resonance, and improve the NVH performance of the bracket. On the other hand, they can increase the force transmission area, effectively disperse the vibration and pressure generated by the electric power steering pump 1 during operation, and improve the local stiffness of the upper portions of both sides of the U-shaped frame 201, preventing the mounting bracket 2 from bending and deforming due to long-term stress. The stiffening ribs 205 and the middle portion of the U-shaped frame 201 are respectively provided with power steering pump mounting holes 206 for connecting with the electric power steering pump 1. That is, there are three power steering pump mounting holes 206, and the three power steering pump mounting holes 206 are distributed in a triangular position. The power steering pump mounting holes 206 provide a precise interface for fixing the electric power steering pump 1, ensuring the positioning accuracy of the electric power steering pump 1 and the mounting bracket 2. On the other hand, the triangular positioning ensures the installation reliability of the electric power steering pump 1, ensuring its coaxiality and stability during operation.

[0021] In this embodiment, the U-shaped frame 201 and the stiffening rib 205 are integrally formed, which facilitates processing and eliminates the connection gaps and weak points between the U-shaped frame 201 and the stiffening rib 205, thereby improving the overall structural strength and stability and reducing assembly errors. Furthermore, the side frames of the U-shaped frame 201 and the corresponding stiffening ribs 205 are respectively provided with stamping grooves 2011. The stamping grooves 2011 further enhance the local deformation resistance of the side frames of the U-shaped frame 201 and the stiffening ribs 205, improving their torsional and bending resistance.

[0022] During manufacturing, the U-shaped frame 201 and the stiffening rib 205 are formed by stamping from 3.5-4mm aluminum alloy plates. Using 3.5-4mm aluminum alloy plates ensures structural rigidity and strength while leveraging the lightweight properties of aluminum alloy to reduce the overall weight of the mounting bracket 2, thus lowering production costs while meeting usage requirements. Stamping ensures high dimensional accuracy and production efficiency, and further enhances the local strength of the material through the stamping process. The support components are welded and fixed to the U-shaped frame 201, achieving a rigid connection with high strength, preventing loosening of the support components during use, and ensuring the stable support provided by the support components to the U-shaped frame 201.

[0023] Specifically, the support components include reinforcing sleeve one 203 and reinforcing sleeve two 207. Reinforcing sleeve one 203 has a semi-circular longitudinal section and is fixedly installed near the end of the side frame of the U-shaped frame 201. Its function is to enhance the local load-bearing capacity of the end of the side frame of the U-shaped frame 201, distribute the pressure of the assembly bolts on the end of the side frame, and prevent cracking or deformation due to concentrated stress. The semi-circular structure also facilitates close fitting and fixing with the side frame of the U-shaped frame 201. Reinforcing sleeve two 207 has a circular tube structure and is fixedly installed near the middle of the side frame of the U-shaped frame 201. Its function is to utilize the uniform stress characteristics of a circular tube to enhance the compression and torsional stiffness of the middle part of the side frame of the U-shaped frame 201. Since the middle part is the core stress area of ​​the side frame, it can effectively withstand the weight and vibration transmitted by the electric power steering pump 1, preventing bending of the middle part of the side frame.

[0024] The assembly holes include a bracket opening 204 and a bracket mounting hole 202. The bracket opening 204 penetrates the bottom of the U-shaped frame 201, which reduces the precision requirements for assembly, improves assembly efficiency, and reduces production costs. The bracket opening 204 corresponds to the reinforcing sleeve 203, and the opening of the reinforcing sleeve 203 faces the bottom of the U-shaped frame 201, facilitating the insertion of bolts from the bottom of the U-shaped frame 201 to connect with the longitudinal beam bracket 3. The reinforcing sleeve 203 also provides support for the bolts, preventing damage to the bottom of the U-shaped frame 201 during bolt tightening. The bracket mounting hole 202 and the reinforcing sleeve 207 are coaxially aligned, ensuring coaxiality during bolt insertion and preventing uneven stress caused by bolt misalignment. The reinforcing sleeve 207 also extends the support length of the bolts, improving the stability and reliability of the connection.

[0025] A rubber damping block 102 and a power steering pump fixing bolt 101 are provided between the electric power steering pump 1 and the mounting bracket 2. The rubber damping block 102 is set inside the power steering pump mounting hole 206. It can absorb the vibration and noise generated by the electric power steering pump 1 during operation by utilizing the elastic properties of rubber, and prevent the vibration from being transmitted to the mounting bracket 2 and the longitudinal beam bracket 3, thereby improving driving comfort. At the same time, it reduces the hard impact between the electric power steering pump 1 and the mounting bracket 2, and extends the service life of both. During installation, the power steering pump fixing bolt 101 passes through the rubber damping block 102 and the mounting bracket 2, and is connected to the fixing seat bolt of the electric power steering pump 1. This tightly connects the electric power steering pump 1, the rubber damping block 102 and the mounting bracket 2, ensuring that the electric power steering pump 1 does not shift or loosen during vehicle operation, and ensuring the stability of the power steering function.

[0026] Mounting bracket 2 is fixedly connected to longitudinal beam bracket 3 by two bracket fixing bolts 5. During installation, mounting bracket 2 is located inside longitudinal beam bracket 3. One bracket fixing bolt 5 passes through the bracket opening 204 on both longitudinal beam bracket 3 and mounting bracket 2, fixing mounting bracket 2 to longitudinal beam bracket 3; the other bracket fixing bolt 5 passes through the bracket mounting hole 202 and reinforcing sleeve 207 on both longitudinal beam bracket 3 and mounting bracket 2, further fixing mounting bracket 2 to longitudinal beam bracket 3. The bracket fixing bolts 5 enable a detachable fixed connection between mounting bracket 2 and longitudinal beam bracket 3, ensuring reliable connection and facilitating subsequent maintenance and replacement. Simultaneously, it guarantees the installation accuracy of mounting bracket 2 and longitudinal beam bracket 3, preventing abnormal operation of electric power steering pump 1 due to connection deviation.

[0027] This utility model is used in conjunction with the automotive longitudinal beam 4 during installation. The longitudinal beam bracket 3 is rigidly connected to the automotive longitudinal beam 4 by multiple bolts, forming a stable reference surface based on the load-bearing strength of the automotive longitudinal beam 4. The mounting bracket 2 is embedded inside the longitudinal beam bracket 3, and dual positioning is achieved through two bracket fixing bolts 5. One bolt passes through the bracket opening 204 at the bottom of the longitudinal beam bracket 3 and the U-shaped frame 201. The dimensional tolerance of the bracket opening reduces the assembly precision requirements and quickly completes the initial fixing. The other bolt passes through the bracket mounting hole 202 of the longitudinal beam bracket 3 and the side frame of the U-shaped frame 201, as well as the coaxial reinforcing sleeve 207. The circular tube guidance of the reinforcing sleeve 207 ensures the coaxiality of the bolt and avoids skewed force, achieving precise positioning of the mounting bracket 2 and the longitudinal beam bracket 3, laying the foundation for the subsequent installation of the power steering pump.

[0028] The electric power steering pump 1 is connected to the mounting bracket 2 through three triangularly distributed power steering pump mounting holes 206. Utilizing the principle of triangular stability, the displacement and rotation of the electric power steering pump 1 in the plane are restricted, ensuring its coaxiality during installation. At the same time, the rubber damping block 102 inside the power steering pump mounting hole 206 first fits against the hole wall, and then the power steering pump fixing bolt 101 passes through the rubber damping block 102 and the mounting bracket 2 before being screwed to the fixing seat of the electric power steering pump 1. This achieves both rigid fixation of the electric power steering pump 1 through the bolt preload and flexible positioning of the electric power steering pump 1 and the mounting bracket 2 by filling the assembly gap through the elastic deformation of the rubber damping block 102.

[0029] When the electric power steering pump 1 is working, it generates high-frequency vibration. This vibration is transmitted to the power steering pump fixing bolt 101 through the fixing seat. It is first absorbed by the rubber damping block 102, cutting off the rigid transmission path of the vibration to the U-shaped frame 201. The remaining slight vibration is transmitted to the mounting bracket 2. The U-shaped structure of the U-shaped frame and the support components form an anti-vibration frame. The vibration amplitude is attenuated by the stiffness of the structure itself. Finally, the vibration transmitted to the longitudinal beam bracket 3 and the vehicle longitudinal beam 4 is greatly reduced. This not only avoids the bracket components from being damaged by long-term vibration fatigue, but also reduces the transmission of vibration noise to the cabin, thus improving driving comfort.

[0030] Finally, although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard 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.

Claims

1. An electric power steering pump bracket, comprising an electric power steering pump (1) and a longitudinal beam bracket (3), wherein the electric power steering pump (1) is fixedly connected to the longitudinal beam bracket (3) via a mounting bracket (2), characterized in that: The mounting bracket (2) includes a U-shaped frame (201). A support component is fixedly connected between the two sides of the U-shaped frame (201). The U-shaped frame (201) has an assembly hole for connecting with the longitudinal beam bracket (3). The upper part of both sides of the U-shaped frame (201) is provided with stiffness reinforcing ribs (205). The stiffness reinforcing ribs (205) are inclined to the side away from the U-shaped frame (201). The stiffness reinforcing ribs (205) and the middle part of the U-shaped frame (201) are respectively provided with power steering pump mounting holes (206) for connecting with the electric power steering pump (1).

2. The electric power steering pump bracket according to claim 1, characterized in that: The U-shaped frame (201) and the stiffening rib (205) are integrally formed, and the side frame of the U-shaped frame (201) and the corresponding stiffening rib (205) are respectively provided with stamping grooves (2011).

3. The electric power steering pump bracket according to claim 1, characterized in that: The support assembly includes a first reinforcing sleeve (203) and a second reinforcing sleeve (207). The first reinforcing sleeve (203) has a semi-circular longitudinal section and is fixedly installed on the side frame of the U-shaped frame (201) near the end. The second reinforcing sleeve (207) has a circular tube structure and is fixedly installed on the side frame of the U-shaped frame (201) near the middle.

4. The electric power steering pump bracket according to claim 3, characterized in that: The assembly holes include a bracket opening (204) and a bracket mounting hole (202). The bracket opening (204) penetrates the bottom of the U-shaped frame (201). The bracket opening (204) corresponds to the first reinforcing sleeve (203), and the opening of the first reinforcing sleeve (203) faces the bottom of the U-shaped frame (201). The bracket mounting hole (202) is coaxially arranged with the second reinforcing sleeve (207).

5. An electric power steering pump bracket according to any one of claims 1 to 4, characterized in that: The U-shaped frame (201) and the stiffening rib (205) are formed by stamping 3.5-4mm aluminum alloy plates, and the support components are welded and fixed to the U-shaped frame (201).

6. The electric power steering pump bracket according to claim 5, characterized in that: A rubber damping block (102) and a power steering pump fixing bolt (101) are provided between the electric power steering pump (1) and the mounting bracket (2). The rubber damping block (102) is set in the power steering pump mounting hole (206), and the power steering pump fixing bolt (101) passes through the rubber damping block (102) and the mounting bracket (2) and is connected to the fixing seat bolt of the electric power steering pump (1).

7. The electric power steering pump bracket according to claim 5, characterized in that: The mounting bracket (2) is fixedly connected to the longitudinal beam bracket (3) by bracket fixing bolts (5).

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