CN209505371U - Connecting bracket, front suspension bottom arm assembly and automotive suspension - Google Patents

Abstract

The utility model discloses connecting brackets, including rack body and fastening assembly, rack body includes mounting portion and the interconnecting piece on the lateral side of mounting portion, fastening assembly includes screw bolt and nut, it is formed with longitudinal hole on interconnecting piece and intersects at the vertical through holes of longitudinal hole, bolt is arranged in vertical through holes and cooperates with nut and rack body is lock on subframe；Also disclose front suspension bottom arm assembly, including swing arm ontology, front lining, back bush and aforementioned connecting bracket, front lining is for connecting subframe, and back bush is hydraulic bushing and interference is pressed on the mandrel of the rear end of swing arm ontology, and connecting bracket interference is pressed in the mounting hole of back bush；Also disclose automotive suspension, including subframe and aforementioned front suspension bottom arm assembly.The interconnecting piece of bolt and rack body cooperatively forms multiple power transmission chambers, not only realizes lightweight, but also increases power transmission path and realize the closed loop transmitting of power, guarantees that connecting bracket has enough strength and stiffness.

Description

Connecting bracket, front suspension lower arm assembly and automobile suspension

technical field

The utility model belongs to the field of automobiles, in particular to a connecting bracket, a lower swing arm assembly of a front suspension and an automobile suspension.

Background technique

Automobile lightweight technology has become a key research topic in the development of the automobile industry. The outstanding advantages brought by lightweight are energy saving, emission reduction, and cost reduction. The main method of lightweight is: optimize the design of the structure of auto parts or use new materials to reduce the weight of the auto product as much as possible under the premise of ensuring the comprehensive performance indicators of the car, so as to achieve weight reduction, consumption reduction, environmental protection, safety, etc. Comprehensive indicators.

Double wishbone, McPherson and other suspension structures have lower swing arms, which are generally triangular arm structures. The outer connection point at the outer end of the structure is connected to the steering knuckle and the wheel through a ball joint. The entire swing arm assembly acts as a guide and support, bears and transmits forces in various directions, and controls the trajectory of the wheels.

For the vehicle model where the bush at the rear connection point of the front lower arm adopts a hydraulic bush, since the rear bush is coaxial with the front bush and arranged along the longitudinal direction of the vehicle, it is necessary to vertically connect the rear bush to the subframe through a bracket . During the use of the vehicle, if the connection structure of the swing arm is unstable and the components are deformed, it will directly affect the positioning of the vehicle wheels and reduce the driving stability. If the connection structure is loose or broken, it will directly lead to loss of steering control and vehicle instability. The connecting structure of the swing arm must have sufficient strength and rigidity.

The existing hydraulic bush connection bracket mainly has steel structure and aluminum alloy structure; among them:

The steel structure is mostly 3mm-4mm sheet metal stamping and forming parts. Disadvantages: steel plates are tailor-welded, heavy, poor dimensional accuracy, many welds, low-grade quality, high cost of materials and molds;

The aluminum alloy structure is an extruded part. The common structure is a lateral hollow structure with openings on both the longitudinal sides and the transverse side. Disadvantages: Insufficient strength and rigidity. The subframe is clamped by the aluminum alloy plates on the vertical sides, occupying The space is large, and the horizontal dimension of the aluminum alloy plate is long, which further increases the occupied space, and some models have the problem of not being able to fit.

Contents of the invention

The technical problem to be solved by the utility model is to provide a connection bracket, a front suspension lower swing arm assembly and an automobile suspension for the existing connection brackets which are either heavy, poor in precision, or insufficient in strength and rigidity.

In order to solve the above-mentioned technical problems, the embodiment of the utility model provides a connecting bracket, which includes a bracket body and a fastening assembly. The mounting part is formed with a mounting hole for inserting the bushing, and the fastening assembly includes bolts and nuts; the connecting part is formed with a longitudinal through hole and a vertical through hole, and the longitudinal through hole runs through in the longitudinal direction The connecting portion, the vertical through hole vertically passes through the connecting portion, and the longitudinal through hole intersects with the vertical through hole; the bolt passes through the vertical through hole, the The nuts are used to cooperate with the bolts to lock the bracket body on the subframe.

Optionally, two longitudinal through holes are set at intervals along the vertical direction, and the vertical through holes intersect the two longitudinal through holes at the same time;

The two vertical through holes are set at intervals along the longitudinal direction, and each of the two vertical through holes corresponds to a group of the fastening components.

Optionally, the bolt avoids the lateral side wall of the longitudinal through hole.

Optionally, the surrounding wall of the longitudinal through hole is formed by sequentially connecting a first side wall, a second side wall, a third side wall and a fourth side wall, and the first side wall and the third side wall Located on both vertical sides of the longitudinal through hole and extending horizontally, the second side wall and the fourth side wall are located on both lateral sides of the longitudinal through hole, and the second side wall is located One side of the hole away from the installation part extends vertically, and the fourth side wall is located on the installation part and is an arc-shaped side wall;

The vertical through hole is a circular through hole.

Optionally, the bracket body is an aluminum alloy structure.

Optionally, the bracket body is an aluminum alloy structure, and the thickness of the first side wall, the second side wall and the third side wall of the longitudinal through hole is 4-6mm.

The embodiment of the utility model also provides a front suspension lower swing arm assembly, including a swing arm body, a front bush and a rear bush, and the inner end of the swing arm body is provided with a front bush, a rear bush and a The above connection bracket, the front bush is used to connect the subframe, the rear bush is a hydraulic bush, and the inner tube of the rear bush is press-fitted on the mandrel at the rear end of the swing arm body. The outer tube of the rear bush is press-fitted in the mounting hole of the connecting bracket with interference.

Optionally, the inner tube of the front bush is press-fitted on the mandrel at the front end of the swing arm body, and the outer tube of the front bush is press-fitted in the mounting hole of the connecting bracket.

The embodiment of the utility model also provides an automobile suspension, including a sub-frame and the above-mentioned lower swing arm assembly of the front suspension, the front bush is connected to the sub-frame, and the rear bush is connected to the sub-frame through the connection. The bracket is connected to the subframe.

Optionally, a fixing frame is provided on the sub-frame, and a mounting groove is provided on the fixing frame, the opening of the mounting groove is located on a lateral side of the fixing frame, and the connecting part is embedded in the mounting In the groove, the parts of the bolt protruding from the vertical through hole are respectively pierced on the vertical side walls of the installation groove, and the nut and the head of the bolt are respectively pressed against the fixing frame and squeeze the fixing frame to clamp the connecting part in the installation groove.

The connection bracket, the lower swing arm assembly of the front suspension and the automobile suspension provided by the embodiment of the utility model, starting from the lightweight design, combined with the topology optimization idea, set the vertical through hole and the vertical through hole on the bracket body, so that the connecting part Formed into a hollow structure, the bracket body is locked on the sub-frame through the cooperation of nuts and bolts passing through the vertical through holes, which not only realizes light weight, but also realizes closed-loop transmission of force. At the same time, the bolts divide the space of the vertical through holes into multiple A small space makes the connection between the bolt and the bracket body cooperate to form multiple force transmission chambers, increasing the force transmission path. Under the limited size and installation space, it ensures that the connection between the connection part and the subframe has sufficient strength and rigidity. Furthermore, crushing and deformation of the bracket body can be avoided, the reliability of the connection of the lower swing arm assembly of the front suspension can be ensured, and the guiding and load-bearing functions can be reliably realized.

Description of drawings

Fig. 1 is the exploded schematic view of the local structure of the automobile suspension provided by the embodiment of the utility model;

Fig. 2 is a partial front view structural schematic diagram of the automobile suspension provided by the embodiment of the present invention;

Fig. 3 is a partial top structural schematic diagram of the automobile suspension provided by the embodiment of the present invention.

The reference signs in the instructions are as follows:

1. Bracket body; 11. Installation part; 12. Connecting part; 121. Longitudinal through hole; 122. Vertical through hole; 123. First side wall; 124. Second side wall; 125. Third side wall; 126 , the fourth side wall;

2. Fastening components; 21. Bolts; 22. Nuts;

3. Swing arm body; 31. Mandrel;

4. Front bushing; 5. Rear bushing; 6. Ball hinge;

7, auxiliary frame; 71, fixed frame; 711, hole position.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects solved by the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Figures 1 to 3, the utility model embodiment provides a connecting bracket, including a bracket body 1 and a fastening assembly 2; The connecting part 12, the mounting part 11 is formed with a mounting hole for the embedded mounting bushing, the connecting part 12 is formed with a longitudinal through hole 121 and a vertical through hole 122, the longitudinal through hole 121 runs through the connecting part 12 in the longitudinal direction, vertically The through hole 122 vertically passes through the connecting portion 12, and the longitudinal through hole 121 intersects with the vertical through hole 122; the fastening assembly 2 includes a bolt 21 and a nut 22, the bolt 21 runs through the vertical through hole 122, and the nut 22 is used for matching Bolts 21 lock the bracket body 1 on the sub-frame 7 . In the present application, the transverse, longitudinal and vertical directions are consistent with the transverse, longitudinal and vertical directions of the vehicle body.

When assembling the lower swing arm assembly of the front suspension, the bushing is press-fitted in the installation hole of the bracket body 1, and the bushing is press-fitted to the mandrel 31 of the swing arm body 3 of the front suspension swing arm assembly, and the bracket One side of the main body 1 is connected with the subframe 7 through the fastening assembly 2 .

The connecting bracket provided by the embodiment of the present invention, starting from the lightweight design, combined with the idea of topology optimization, sets the vertical through hole 121 and the vertical through hole 122 on the bracket body 1, so that the connecting part 12 is formed as a hollow structure, and the nut 22 Cooperate with the bolts 21 penetrating the vertical through holes 122 to lock the bracket body 1 on the subframe 7, which not only realizes weight reduction, but also realizes the closed-loop transmission of force. At the same time, the bolts 21 divide the space of the vertical through holes 121 into multiple The small space makes the bolt 21 cooperate with the connecting part 12 of the bracket body 1 to form a plurality of force transmission cavities, increasing the force transmission path, and under the limited size and installation space, it is ensured that the connecting part 12 and the subframe 7 have sufficient space. Strength and rigidity, thereby avoiding the crushing and deformation of the bracket body 1, and ensuring the reliability of the connection of the lower swing arm assembly of the front suspension. Guiding and carrying functions simplify the structure of the connecting bracket.

The connecting bracket of the present application is suitable for the connection between the rear bush 5 and the subframe 7, especially for the vehicle type where the rear bush 5 is a hydraulic bush, and also for the connection between the front bush 4 and the subframe 7.

Preferably, the bracket body 1 is made of an aluminum alloy structure, and the aluminum alloy material is selected, which is beneficial to light weight, and can be processed through extrusion molding, machining, etc., with a low process waste rate, easy molding and high precision, and can ensure assembly Under the premise of unchanged size and reliability requirements, the interior is hollowed out, so that the bolts 21 cooperate with the connecting portion 12 of the bracket body 1 to form a connecting bracket with multiple force transmission chambers, and the bracket body 1 with sufficient strength and rigidity is obtained. Of course, the bracket body 1 can also choose other lightweight materials (lighter than steel) on the premise of satisfying the mechanical properties.

In one embodiment, as shown in FIG. 2 and FIG. 3 , there are two longitudinal through holes 121 arranged vertically at intervals, and the vertical through hole 122 intersects the two longitudinal through holes 121 at the same time, so that the bolt 21 and the The connecting part 12 is combined into a double-layer grid structure, so that the force is transmitted from the upper surface of the connecting part 12 through a circle, and finally transmitted to the lower surface of the connecting part 12 to form a closed loop. This structure is very stable and can provide greater vertical stiffness. Improve the strength and rigidity of the connecting bracket, avoid deformation, and achieve better weight and cost reduction effects under the premise of ensuring safety and reliability.

In one embodiment, as shown in FIG. 2 and FIG. 3 , two vertical through holes 122 are set at intervals along the longitudinal direction, and the two vertical through holes 122 each correspond to a set of fastening components 2, so that the bolt 21 and The connecting parts 12 are combined into a two-way double-layer intersecting grid structure, which further improves the strength and rigidity of the connecting bracket, reduces weight and cost, and has the same load-carrying capacity as the solid connecting part 12 .

Preferably, as shown in Figure 3, the bolt 21 avoids the lateral side wall of the longitudinal through hole 121, which is beneficial to the bolt 21 and the vertical side wall and lateral side wall of the longitudinal through hole 121 to form a small cavity closed around, increasing Force transmission path; the larger the size, the more favorable the life requirement, but it involves limited space. Under the limited size, the part of the connecting bracket used to connect the subframe 7 is divided into smaller grid units with better structural stability, increasing The force transmission path finally forms a closed loop to ensure strength, stiffness and reliability.

In one embodiment, as shown in Figures 1 to 3, the installation part 11 is an annular installation part. Since the bushing is in the shape of a ring, setting the installation part 11 as an annular installation part is beneficial to reduce the use of the installation part 11. The material and the volume of the mounting part 11.

In one embodiment, as shown in FIGS. 1 to 3 , the connecting portion 12 is a rectangular boss, which is convenient for connecting with the sub-frame 7 and has a good bearing capacity.

Preferably, as shown in FIG. 1 , the vertical through hole 122 is a circular through hole, and the circular through hole can limit the position of the bolt 21 to prevent the mounting part 11 from shaking relative to the subframe 7 horizontally.

Preferably, as shown in Figure 3, the longitudinal through hole 121 is a quadrangular through hole, which not only increases the hollow part corresponding to the longitudinal through hole 121, but also saves material and realizes light weight; of course, the longitudinal through hole 121 can also adopt other shapes, such as ellipse shape.

In one embodiment, as shown in FIG. 2 , the surrounding wall of the longitudinal through hole 121 is formed by sequentially connecting the first side wall 123 , the second side wall 124 , the third side wall 125 and the fourth side wall 126 . The side wall 123 and the third side wall 125 are located on the vertical sides of the longitudinal through hole and extend horizontally, the second side wall 124 and the fourth side wall 126 are located on the lateral sides of the longitudinal through hole, and the second side wall 124 is located on the vertical side of the longitudinal through hole. One side of the hole away from the installation part extends vertically, and the fourth side wall 126 is located on the installation part 11 and is an arc-shaped side wall, thus forming a quadrilateral through hole with an arc edge. The fourth side wall 126 of the longitudinal through hole 121 is a shared partial structure of the installation part 11 and the connection part 12, and the structure is more compact, and the longitudinal passage is increased without affecting the mechanical properties of the installation part 11 and the connection part 12. The hollow part of the hole 121, when two vertical through holes 122 and two longitudinal through holes 121 are provided, can also make the bolt 21 and the connecting part 12 combine into a two-way double-layer vertical intersection grid structure, further increasing the connection bracket. Strength, stiffness.

Preferably, as shown in FIG. 3 , when there are two longitudinal through holes 121 , the two longitudinal through holes 121 are symmetrical with respect to the horizontal plane.

Preferably, the two bolts 21 are located at the transverse middle of the connecting portion 12 and arranged symmetrically with respect to the longitudinal middle of the connecting portion 12, which increases structural symmetry and facilitates the distribution of stress.

In one embodiment, the bracket body 1 is an aluminum alloy structure and the longitudinal through hole 121 is a quadrilateral through hole (the surrounding wall including the aforementioned longitudinal through hole 121 is composed of the first side wall 123 , the second side wall 124 , the third side wall 125 and the fourth side wall 126 are connected in sequence): the thickness of the vertical side wall of the longitudinal through hole 121 and the side wall of the longitudinal through hole 121 away from the mounting part 11 is 4-6mm, ensuring enough Under the premise of mechanical performance, light weight is realized.

Preferably, when two longitudinal through holes 121 are provided, the thickness (preferably 6 mm) of the upper side wall of the upper longitudinal through hole 121 and the lower side wall of the lower longitudinal through hole 121 are respectively greater than that of the longitudinal through hole 121. The thickness of the side wall (preferably 5 mm) away from the side wall of the installation part 11, the thickness of the side wall of the side of the longitudinal through hole 121 away from the installation part 11 is greater than the longitudinal through hole 121 at the top and the longitudinal through hole at the bottom The thickness of the side wall shared by 121 (ie, the side wall is both the lower side wall of the upper longitudinal through hole 121 and the upper side wall of the lower longitudinal through hole 121 ) (preferably 4mm).

In a preferred embodiment of the present utility model, the bracket body 1 is an aluminum alloy structure, and has two longitudinal through holes 121 and two vertical through holes 122, so that the weight of the bracket body 1 is reduced relative to the steel bracket welded by sheet metal About 0.1kg, the weight loss of the whole vehicle is about 0.2kg. The car is composed of tens of thousands of parts, ranging from large assembly structural parts to small parts such as screws and nuts. Lightweight design is a way of thinking, and the product is small Cheng Duo's weight reduction will eventually effectively support the weight reduction and consumption reduction indicators of the whole vehicle. Although the raw material price of aluminum alloy is higher than that of steel, depending on the structure, the difficulty of forming and the cost of molds, the price of finished products may not be higher than that of aluminum products. For steel products, the bracket body 1 of the utility model has a certain price advantage compared with the steel bracket welded by sheet metal. Improve the market competitiveness of products.

As shown in Figures 1 to 3, the embodiment of the present utility model also provides a front suspension lower swing arm assembly, including the swing arm body 3, the front bushing 4, the rear bushing 5 and any of the aforementioned embodiments. The connecting bracket, the inner end of the swing arm body 3 is provided with a front bushing 4 and a rear bushing 5, the front bushing 4 is used to connect the subframe 7, the rear bushing 5 is a hydraulic bushing, and the rear bushing 5 The inner tube is press-fitted on the mandrel 31 at the rear end of the swing arm body 3, and the outer tube of the rear bush 5 is press-fitted into the mounting hole of the connecting bracket.

The connection bracket mentioned in the previous embodiment is used to connect the rear bushing 5 and the subframe 7, which not only realizes light weight, but also ensures that the connection between the swing arm body 3 and the subframe 7 has sufficient strength and rigidity, and ensures that the bolts 21 and The matching nut 22 tightens the support body 1 and the subframe 7 according to the specified torque without crushing and deformation of the rear support body 1, and reliably realizes the guiding and load-bearing functions of the lower swing arm assembly of the front suspension.

Specifically, as shown in Figure 1, there are three connection points on the swing arm body 3, which are respectively the outer connection point located at the outer end and the front connection point and rear connection point located at the inner end. Hinge 6 connects steering knuckle, front connection point is provided with front bushing 4 and can be fastened to subframe 7 by fastening bolts embedded in front bushing 4, rear connection point is provided with rear bushing 5 and can be locked by connecting bracket As for the sub-frame 7, this is a prior art and will not be repeated here.

Of course, the front bushing can also be connected to the subframe through the connecting bracket. Specifically, the inner tube of the front bushing can be press-fitted on the mandrel at the front end of the swing arm body, and the outer tube of the front bushing can be press-fitted on the Connect to the mounting hole of the bracket (not shown).

Specifically, the rear bushing 5 includes an inner tube, a rubber main spring sheathed on the inner tube, and an outer tube covering the rubber main spring. Enter the mandrel 31. Similarly, the front bush 4 also includes an inner tube, a rubber main spring and an outer tube.

As shown in Figure 1, the embodiment of the utility model also provides an automobile suspension, including a subframe 7 and the lower swing arm assembly of the front suspension mentioned in any of the foregoing embodiments, and the front bushing 4 is connected to the auxiliary vehicle frame 7, and the rear bushing 5 is connected to the subframe 7 through a connecting bracket.

In one embodiment, as shown in FIG. 1 to FIG. 3 , the auxiliary frame 7 is provided with a fixing frame 71, and the fixing frame 71 is provided with a mounting groove, and the opening of the mounting groove is located on one lateral side of the fixing frame 71. 12 is embedded in the installation groove, the parts where the bolts 21 protrude from the vertical through hole 122 are respectively pierced on the vertical side walls of the installation groove, and the heads of the nuts 22 and the bolts 21 are respectively pressed against the two sides of the fixing frame 71 and squeezed. Press the fixing frame 71 to clamp the connecting portion 12 in the installation groove. The connecting part 12 of the bracket body 1 is assembled in the fixing frame 71 of the sub-frame 7, which takes up less space, has a stable structure, and has a large vertical rigidity, which can ensure the connection reliability of the connecting bracket and the sub-frame 7. On the premise, the transverse length of the connecting portion 12 is reduced to further reduce space occupation.

Specifically, holes 711 corresponding to the vertical through holes 122 may be preset on the fixing frame 71 for passing the bolts 21 .

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model should be included in the utility model. within the scope of protection.

Claims (10)

1. a kind of connecting bracket, including rack body and fastening assembly, the rack body includes mounting portion and is convexly equipped in described The interconnecting piece of the lateral side of mounting portion is formed with the mounting hole for embedded installation bushing, the fastening on the mounting portion Component includes screw bolt and nut；It is characterized in that, being formed with longitudinal hole and vertical through holes on the interconnecting piece, the longitudinal direction is logical Hole penetrates through the interconnecting piece along longitudinal direction, and the vertical through holes vertically penetrate through the interconnecting piece, and the longitudinal hole with it is described Vertical through holes intersection；The bolt is arranged in the vertical through holes, and the nut is for cooperating the bolt by the bracket sheet Body is lock on subframe.

2. connecting bracket according to claim 1, which is characterized in that the longitudinal hole is set as two and is vertically spaced Setting, the vertical through holes intersect with two longitudinal holes simultaneously；

The vertical through holes are set as two and longitudinally spaced setting, two vertical through holes respectively correspond to one group described in fasten Component.

3. connecting bracket according to claim 1, which is characterized in that the bolt avoids the cross side of the longitudinal hole Wall.

4. connecting bracket according to claim 1, which is characterized in that the wall of the longitudinal hole is by the first side wall, Two side walls, third side wall and the 4th side wall are connected in sequence, and the first side wall and the third side wall are located at the longitudinal direction The vertical two sides of through-hole and horizontal extension, the second sidewall and the 4th side wall are located at laterally the two of the longitudinal hole Side, the second sidewall are located at the side far from the mounting portion of the longitudinal hole and vertically extending, the 4th side wall It on the mounting portion and is curved wall；

The vertical through holes are circular through hole.

5. connecting bracket according to claim 1-4, which is characterized in that the rack body is aluminum alloy junction Structure.

6. connecting bracket according to claim 4, which is characterized in that the rack body is aluminium alloy structure, described vertical To the first side wall of through-hole, second sidewall and third side wall with a thickness of 4-6mm.

7. a kind of front suspension bottom arm assembly, including swing arm ontology, front lining and back bush, set on the inner end of the swing arm ontology There are front lining and back bush, the back bush is hydraulic bushing, which is characterized in that further includes such as any one of claim 1-6 institute The connecting bracket stated, back bush inner tube interference press fitting is on the mandrel of swing arm ontology rear end, the back bush outer tube Interference is pressed in the mounting hole of the connecting bracket.

8. front suspension bottom arm assembly according to claim 7, which is characterized in that front lining inner tube interference press fitting in On the mandrel of swing arm ontology front end, the front lining outer tube interference press fitting is in the mounting hole of the connecting bracket.

9. a kind of automotive suspension, including subframe, which is characterized in that further include that front suspension lower swing arm as claimed in claim 7 is total At the front lining is connected to the subframe, and the back bush is connected to the subframe by the connecting bracket.

10. automotive suspension according to claim 9, which is characterized in that the subframe is equipped with fixed frame, the fixation The mounting groove that frame is equipped with, being open for the mounting groove are located at the lateral side of the fixed frame, described in the interconnecting piece insertion In mounting groove, the position for protruding from the vertical through holes of the bolt is arranged in the vertical two sidewalls of the mounting groove respectively, The head of the nut and the bolt pushes against the two sides in the fixed frame respectively and squeezes the fixed frame for the connection Portion is clamped in the mounting groove.