Suspension system supporting frame and chassis assembling method

Abstract

The invention relates to a suspension system supporting frame and chassis assembling method, and the suspension system supporting frame and chassis assembling method comprises a support body which is used for bearing a suspension system; the supporting and positioning structure is arranged on the bracket body, is matched with an auxiliary frame of the suspension system and is used for positioning and supporting the auxiliary frame; the floating supporting structure is arranged on the support body and used for supporting a lower swing arm of the suspension system; when the upper end of a suspension spring of the suspension system is in a free state, the lower swing arm is in a balanced state under the support of the floating support structure; after the suspension spring is subjected to downward external force, the floating supporting structure swings downwards along with the lower swing arm, so that the jacking force needed by the jacking mechanism in the assembling process is reduced, and meanwhile the contact position of the suspension spring and a chassis is conveniently adjusted.

Description

Technical Field

[0001] The invention relates to the technical field of automobile assembly, in particular to a method for assembling a suspension system support frame and a chassis. Background Art

[0002] The suspension system is a general term for all the force-transmitting connection devices between the frame and the axle or wheel of a car. Its function is to transmit the force and torque acting between the wheel and the frame, and to buffer the impact force transmitted to the frame or body by the uneven road surface, and to attenuate the vibration caused thereby, so as to ensure the smooth driving of the car. The suspension system includes structures such as the subframe, suspension springs, upper swing arms and lower swing arms, among which the upper ends of the subframe and suspension springs need to be fixedly connected to the body.

[0003] In the field of automobile manufacturing, chassis assembly is an important link in the process of automobile automated production. During chassis assembly, during the assembly process of the chassis and suspension system, the suspension system is supported and positioned by the support frame. After the chassis and the suspension system are positioned up and down at the assembly station, the lifting mechanism lifts the support frame to make the connection between the suspension system and the chassis contact, and then assembly is carried out.

[0004] In the above chassis and suspension system assembly method, a large lifting driving force needs to be provided during the assembly process, the suspension spring is compressed to make the chassis and the subframe contact each other, and then the installation position is connected. On the one hand, the lifting mechanism needs to provide a large lifting force, and on the other hand, when the contact position between the suspension spring and the chassis is slightly offset, it does not change and adjust. Summary of the invention

[0005] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a suspension system support frame and chassis assembly method, thereby reducing the lifting force required by the lifting mechanism during the assembly of the chassis and the suspension system, and facilitating the adjustment of the contact position between the suspension spring and the chassis.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A suspension system support frame, comprising

[0008] A bracket body, the bracket body is used to carry the suspension system;

[0009] A support and positioning structure, arranged on the support body, cooperates with the sub-frame of the suspension system, and is used to position and support the sub-frame;

[0010] A floating support structure, disposed on the support body, for supporting a lower swing arm of the suspension system;

[0011] Among them, when the upper end of the suspension spring of the suspension system is in a free state, the lower swing arm is in a balanced state under the support of the floating support structure; after the suspension spring is subjected to a downward external force, the floating support structure swings downward with the lower swing arm.

[0012] As a further improvement of the above technical solution:

[0013] The structure of the floating support structure includes:

[0014] A support block, the support block is in contact with the lower surface of the middle portion of the lower swing arm;

[0015] A movable arm, one end of which is movably connected to the bracket body, and the other end of which is provided with the support block;

[0016] An elastic structure, one end of which is connected to the movable arm, and the other end of which is connected to the bracket body;

[0017] The elastic structure provides an upward elastic force to support the lower swing arm through the movable arm and the support block, and the elastic structure provides a compressive deformation amount so that when the lower swing arm swings downward under the action of an external force, the posture of the movable arm changes and the height of the support block changes.

[0018] It also includes an articulated seat arranged on the bracket body, one end of the movable arm is articulated to the articulated seat, one end of the elastic structure is articulated to the movable arm, and the other end of the elastic structure is articulated to the bracket body, the elastic structure provides an oblique upward elastic force, and when the lower swing arm swings downward under the action of an external force, the movable arm swings around the articulated seat;

[0019] A limiting structure can be detachably installed on the bracket body, and the limiting structure includes an upper limit block and a lower limit block. The upper limit block corresponds to the upper surface of the movable arm and is used to limit the upper limit position of the swing of the movable arm. The lower limit block corresponds to the lower surface of the movable arm and is used to limit the lower limit position of the swing of the movable arm.

[0020] The elastic structure comprises a connecting cylinder and a connecting rod, one end of the connecting cylinder is hinged to the bracket body, a movable cavity is arranged in the connecting cylinder, one end of the connecting rod is hinged to the movable arm, the other end of the connecting rod is slidably connected to the movable cavity, and a limit plate is arranged on the connecting rod;

[0021] A coil spring is sleeved on the connecting rod, one end of the coil spring abuts against the end of the connecting cylinder, and the other end of the coil spring abuts against the limit plate. A limit plug-in is provided on the connecting cylinder to cooperate with the connecting rod inside the active cavity, and the limit plug-in is used to put the coil spring in a compressed state.

[0022] A sliding part is provided at one end of the connecting rod, and the sliding part is slidably connected with the movable cavity. A limiting groove is axially provided on the sliding part, and a socket is provided on the movable cavity. The limiting plug-in is installed in the socket and its end is matched with the limiting groove.

[0023] An oil groove is arranged along the circumference of the outer wall of the sliding part, and an oil nozzle is arranged on the connecting cylinder. When the compression amount in the compression state is the smallest, the oil groove corresponds to the oil nozzle.

[0024] The lower surface of the movable arm is a plane, the portion of the lower limit block corresponding to the lower surface of the movable arm is a cylindrical surface, and the contact mode between the movable arm and the lower limit block is line contact.

[0025] The elastic structure further comprises a connecting frame detachably connected to the movable arm, and the connecting frame is hinged to the end of the connecting rod;

[0026] The floating support structure also includes a base plate, which is fixedly connected to the bracket body, and the hinge seat is fixedly connected to the base plate. The limiting structure includes a mounting frame, and the upper limit block and the lower limit block are both installed on the mounting frame. The mounting frame is detachably connected to the base plate via fasteners, and the support block is detachably connected to the movable arm via fasteners, and the connecting cylinder is hinged to the mounting frame.

[0027] The base plate is provided with a first connection hole corresponding to the mounting frame, the movable arm is provided with a second connection hole corresponding to the connecting frame, and the movable arm is provided with a third connection hole corresponding to the supporting block. The first connection hole and the second connection hole are used to change the positions of the elastic structure and the limiting structure relative to the base plate, and the third connection hole is used to change the position of the supporting block on the movable arm.

[0028] A chassis assembly method comprises the following steps:

[0029] The chassis arrives at the assembly station, and the suspension system support frame equipped with the suspension system is transported to the assembly station by the conveyor line. The subframe of the suspension system is supported by the floating support structure, and the connection position of the suspension spring and the vehicle body corresponds;

[0030] The lifting mechanism of the assembly station lifts the suspension system support frame, so that the suspension system moves upward and the suspension spring contacts the chassis;

[0031] After the suspension spring contacts the chassis, the lifting mechanism continues to work to fit the subframe of the suspension system to the chassis. During the process from the suspension spring contacts the vehicle body to the subframe fitting to the chassis, the suspension spring is subjected to a downward external force, and the floating support structure swings downward with the lower arm to reduce the deformation of the suspension spring.

[0032] The beneficial effects of the present invention are as follows:

[0033] The present invention has a compact and reasonable structure and is easy to operate. By arranging a floating support structure for a floating lower swing arm on a suspension system support frame, the state of the front suspension system is maintained by elastic force, and the positioning of the connection part is realized. During the assembly process of the suspension system and the chassis, the jacking structure lifts the suspension system to make the suspension spring contact and be subjected to force with the chassis, and then the floating support structure makes the lower swing arm swing, reducing the deformation of the suspension spring, thereby reducing the jacking force required by the jacking mechanism during the assembly process of the chassis and the suspension system, and at the same time facilitating the adjustment of the contact position between the suspension spring and the chassis.

[0034] At the same time, the present invention also has the following advantages:

[0035] (1) A dynamically deformable triangular linkage structure is formed by setting the connection structure between the movable arm, the elastic structure and the bracket body in the main structure of the floating support structure as a hinge, and the swing angle of the movable arm is changed by the deformation of the elastic structure. The longitudinal installation space occupied by the floating support structure is reduced when the swing condition of the lower swing arm remains unchanged. In addition, the swing trend of the movable arm is consistent with the swing trend of the lower swing arm, and conforms to the arc trajectory of the fulcrum on the lower swing arm, so that the displacement of the fulcrum on the support block is smoother, thereby avoiding the relative movement of the upper end of the suspension spring and the chassis during the swing of the lower swing arm.

[0036] (2) The floating support structure includes a base plate, and a first connection hole and a second connection hole for adjusting the position of the elastic structure are arranged on the base plate and the movable arm. In combination with the contact surface between the lower limit block and the movable arm being a cylindrical surface, the swing angle of the movable arm can be directly adjusted. Meanwhile, a third connection hole for adjusting the position of the support block is arranged on the movable arm, and the support position can be directly adjusted, so that the design of the floating support structure is modularized and can be applied to suspension systems of different specifications. The floating support structure can also be installed on the bracket body after being adjusted, thereby simplifying the design and assembly procedures. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic structural diagram of the assembly of a suspension system support frame and a suspension system according to an embodiment of the present invention (before chassis assembly).

[0038] Figure 2 It is a schematic structural diagram of the assembly of a suspension system support frame and a suspension system according to an embodiment of the present invention (after the chassis is assembled).

[0039] Figure 3 It is a schematic structural diagram of a suspension system support frame according to an embodiment of the present invention.

[0040] Figure 4 It is a schematic structural diagram of a suspension system support frame according to an embodiment of the present invention.

[0041] Figure 5 Schematic diagram of the structure of a suspension system support frame according to an embodiment of the present invention (another state).

[0042] Figure 6 The diagram is a front view of a suspension system support frame in two states according to an embodiment of the present invention.

[0043] Figure 7 It is a schematic structural diagram (axial cross-section view) of an elastic structure according to an embodiment of the present invention.

[0044] Figure 8 It is a structural schematic diagram (explosion diagram) of an elastic structure according to an embodiment of the present invention.

[0045] Fig. 9 It is a three-dimensional diagram of a limiting structure according to an embodiment of the present invention.

[0046] Fig.10 The figure is a schematic diagram of the assembly structure of a suspension system support frame according to an embodiment of the present invention.

[0047] in:

[0048] 1. Suspension system; 10. Upper support; 11. Suspension spring; 12. Upper swing arm; 13. Subframe; 14. Lower swing arm; 15. Brake disc;

[0049] 2. Bracket body; 3. Support positioning structure;

[0050] 4. floating support structure; 41. hinge seat; 42. movable arm; 420. third connection hole; 44. support block;

[0051] 43, elastic structure; 431, connecting frame; 432, limiting plate; 433, spiral spring; 434, connecting cylinder; 4341, movable cavity; 4342, oil hole; 4343, plug hole; 435, limiting plug-in; 436, connecting rod; 4361, sliding part; 4362, oil groove; 4363, limiting groove; 437, oil nozzle;

[0052] 45. Limiting structure; 451. Mounting frame; 452. Upper limit block; 453. Lower limit block;

[0053] 46. ​​Base plate; 460. First connection hole. DETAILED DESCRIPTION

[0054] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0055] Embodiment 1:

[0056] like Figure 1As shown, the suspension system support frame of this embodiment includes a support body 2, a support positioning structure 3 and a floating support structure 4.

[0057] The support body 2 is used to carry the suspension system 1;

[0058] The support and positioning structure 3 is arranged on the bracket body 2 and cooperates with the sub-frame 13 of the suspension system 1 to position and support the sub-frame 13;

[0059] The floating support structure 4 is disposed on the support body 2 and is used to support the lower swing arm 14 of the suspension system 1;

[0060] Among them, when the upper end of the suspension spring 11 of the suspension system 1 is in a free state, the lower swing arm 14 is in a balanced state under the support of the floating support structure 4; after the suspension spring 11 is subjected to a downward external force, the floating support structure 4 swings downward with the lower swing arm 14, providing space for the swing of the lower swing arm 14 and reducing the deformation of the suspension spring 11.

[0061] By arranging a floating support structure 4 for floatingly supporting the lower arm 14 on the suspension system support frame, the state of the front suspension system 1 is maintained by elastic force, and the positioning of the connection part is realized. During the assembly process of the suspension system 1 and the chassis, the jacking structure lifts the suspension system 1 so that the suspension spring 11 contacts the chassis and is subjected to force. Then, the floating support structure 4 causes the lower arm 14 to swing, reducing the deformation of the suspension spring 11, thereby reducing the jacking force required by the jacking mechanism during the assembly process of the chassis and the suspension system, and at the same time facilitating the adjustment of the contact position of the suspension spring 11 with the chassis.

[0062] The suspension system 1 is a double wishbone suspension system, or a suspension system 1 having a lower arm 14. The double wishbone suspension system has a structure as shown in FIG. Figure 1-Figure 3 As shown, the vehicle comprises a subframe 13, the subframe 13 is flexibly connected to the wheel hub through a lower swing arm 14, a brake disc 15 is installed on the wheel hub, a suspension spring 11 is connected to an upper swing arm 12, a shock absorber is also arranged at the lower end of the suspension spring 11, an upper support 10 is arranged at the upper end of the suspension spring 11, and the upper support 10 is used to connect with the chassis. During the driving process of the vehicle, when the extension and contraction state of the suspension spring 11 is different, the swing posture of the lower swing arm 14 is different, thereby achieving buffering of the wheel when the ground is uneven.

[0063] The above-mentioned free state refers to the state before the suspension spring 11 contacts the chassis during the assembly process. The floating support structure 4 supports the lower control arm 14, and limits the posture of the lower control arm 14 relative to the subframe 13 by supporting, so that the posture of the suspension spring 11 is restricted. Since the floating support structure 4 has a bearing capacity sufficient to support the lower control arm 14, when the suspension system 1 is placed on the support frame, the movable connection structure state of the suspension system 1 is fixed, that is, the lower control arm 14 is in a balanced state, and the position of the upper support 10 before assembly is positioned, which is convenient for the assembly of the suspension system 1 and the chassis.

[0064] In addition, the support body 2 is also provided with a guide positioning structure that cooperates with the chassis and is used for positioning the connection structure between the suspension system 1 and the chassis during the assembly process of the two.

[0065] like Figure 1-Figure 3 As shown, the structure of the floating support structure 4 includes a support block 44, a movable arm 42 and an elastic structure 43. The support block 44 contacts and cooperates with the lower surface of the middle part of the lower swing arm 14; one end of the movable arm 42 is movably connected to the support body 2, and the other end of the movable arm 42 is provided with the support block 44; one end of the elastic structure 43 is connected to the movable arm 42, and the other end of the elastic structure 43 is connected to the support body 2.

[0066] The elastic structure 43 provides an upward elastic force to support the lower swing arm 14 through the movable arm 42 and the support block 44, and the elastic structure 43 provides a compressive deformation amount, so that when the lower swing arm 14 swings downward under the action of an external force, the posture of the movable arm 42 changes and the height of the support block 44 changes.

[0067] The elastic force provided by the elastic structure 43 is sufficient to support the suspension system 1. The contact surface of the support block 44 with the lower surface of the lower swing arm 14 is a plane. In addition, in order to facilitate the positioning and placement of the suspension system 1 on the bracket body 2, stoppers are provided on both sides of the contact surface of the support block 44 to limit the lower swing arm 14 from the length direction of the chassis, that is, the contact surface of the stopper and the support block 44 forms a groove structure, such as Figure 4 , Figure 5 shown.

[0068] The specific structure of the floating support structure 4 can be in various forms, one of which is as follows: Figure 3 As shown, the movable arm 42 is slidably connected to the bracket body 2, so that the movable arm 42 can slide up and down relative to the bracket body 2, and the support block 44 is installed at the upper end of the movable arm 42. The elastic structure 43 is a gas spring. The pressure cylinder of the elastic structure 43 is fixedly installed on the bracket body 2. The piston rod end of the elastic structure 43 is connected to the movable arm 42. When the piston rod is in an extended state, it provides an upward elastic force so that the support block 44 supports the lower swing arm 14. When the suspension system 1 is subjected to external force, the piston rod is compressed, the lower swing arm 14 swings, and the support block 44 changes the position of supporting the lower swing arm 14, and lowers its own height as the lower swing arm 14 swings.

[0069] like Figure 3 As shown, the longitudinal structure of the floating support structure 4 occupies a larger space, so that the overall height of the bracket body 2 is relatively high.

[0070] Embodiment 2:

[0071] like Figure 1 , Figure 2 , Figure 4-Figure 6 As shown, the difference from the first embodiment is that this embodiment shows a floating support structure 4 of another specific structure.

[0072] The structure of the floating support structure 4 includes a support block 44, a movable arm 42 and an elastic structure 43. The support block 44 contacts and cooperates with the lower surface of the middle part of the lower swing arm 14; one end of the movable arm 42 is movably connected to the bracket body 2, and the other end of the movable arm 42 is provided with the support block 44; one end of the elastic structure 43 is connected to the movable arm 42, and the other end of the elastic structure 43 is connected to the bracket body 2.

[0073] The bracket body 2 further includes an articulated seat 41, one end of a movable arm 42 is articulated to the articulated seat 41, one end of an elastic structure 43 is articulated to the movable arm 42, and the other end of the elastic structure 43 is articulated to the bracket body 2. The elastic structure 43 provides an upward elastic force. When the lower swing arm 14 swings downward under the action of an external force, the movable arm 42 swings around the articulated seat 41.

[0074] A limiting structure 45 can be detachably installed on the bracket body 2, and the limiting structure 45 includes an upper limit block 452 and a lower limit block 453. The upper limit block 452 corresponds to the upper surface of the movable arm 42 and is used to limit the upper limit position of the swing of the movable arm 42. The lower limit block 453 corresponds to the lower surface of the movable arm 42 and is used to limit the lower limit position of the swing of the movable arm 42.

[0075] The three hinge positions of the hinge seat 41, the movable arm 42 and the elastic structure 43 form a triangle. Specifically, under the elastic force of the elastic structure 43 and the limiting structure 45, the movable arm 42 is in a horizontal or nearly horizontal state, which can be specifically set according to needs, such as Figure 6 Middle Figure (a). Since the rotation axis on the hinge seat 41 is higher than the hinge axis of the hinge position of the elastic structure 43 and the bracket body 2, the triangle is an inverted triangle, and the elastic force provided by the elastic structure 43 is the lower side of the triangle, and the direction of the elastic force is obliquely upward. The swing range angle α of the movable arm 42 is adjusted by setting the upper swing limit position and the lower swing limit position of the movable arm 42, as shown in FIG. Figure 6 Middle figure (b).

[0076] By setting the connection structure among the movable arm 42, the elastic structure 43 and the bracket body 2 in the main structure of the floating support structure 4 as a hinge, a dynamically deformable triangular linkage structure is formed, and the swing angle of the movable arm 42 is changed by the deformation of the elastic structure 43, so that the longitudinal installation space occupied by the floating support structure 4 is reduced when the swing condition of the lower swing arm 14 remains unchanged. In addition, the swing trend of the movable arm 42 is consistent with the swing trend of the lower swing arm 14, conforming to the arc trajectory of the fulcrum on the lower swing arm 14, so that the displacement of the fulcrum on the support block 44 is smoother, thereby avoiding the relative movement of the upper end of the suspension spring 11 and the chassis during the swing of the lower swing arm 14.

[0077] like Figure 6 As shown, the swing range angle of the movable arm 42 is α, which is smaller than the maximum angle of the lower swing arm 14 that can be freely swung downward from a balanced state, so that after the subframe 13 of the suspension system 1 contacts the chassis during the assembly process, the lower swing arm 14 is in a stable state, thereby preventing the force state of the upper end of the suspension spring 11 from being changed due to the activity or elastic vibration of the movable arm 42, thereby ensuring that the contact position of the suspension spring 11 with the chassis remains unchanged.

[0078] like Figure 4-Figure 8 As shown, the elastic structure 43 includes a connecting cylinder 434 and a connecting rod 436. One end of the connecting cylinder 434 is hinged to the bracket body 2. A movable cavity 4341 is provided in the connecting cylinder 434. One end of the connecting rod 436 is hinged to the movable arm 42. The other end of the connecting rod 436 is slidably connected to the movable cavity 4341. A limit plate 432 is provided on the connecting rod 436.

[0079] A coil spring 433 is sleeved on the connecting rod 436, one end of the coil spring 433 abuts against the end of the connecting cylinder 434, and the other end of the coil spring 433 abuts against the limit plate 432. The connecting cylinder 434 is provided with a limit plug-in 435 that cooperates with the connecting rod 436 inside the movable cavity 4341, and the limit plug-in 435 is used to put the coil spring 433 in a compressed state.

[0080] The assembly process of the floating support structure 4 is as follows:

[0081] First, the hinge seat 41 is installed on the bracket body 2, and the movable arm 42 provided with the support block 44 is hinged to the hinge seat 41;

[0082] Then, one end of the elastic structure 43 is hinged to the bracket body 2, and the other end of the elastic structure 43 is hinged to the movable arm 42;

[0083] Finally, the movable arm 42 is placed between the upper limit block 452 and the lower limit block 453 of the limiting structure 45 , and the movable arm 42 is adjusted downward during the process of connecting the limiting structure 45 with bolts to further compress the coil spring 433 in the elastic structure 43 .

[0084] The elastic structure 43 of this embodiment adopts a structure in which two relatively sliding parts cooperate with a coil spring 433. Under the action of external force, the positions of the two hinge points change, and the length of one side of the hinged triangle is changed to change the shape of the triangle, thereby realizing the swing of the movable arm 42. A limiting plug-in 435 is provided so that the elastic structure 43 itself has a preset spring compression amount, which is convenient for the installation of the elastic structure 43. At the same time, combined with the limiting effect of the upper limit block 452, the coil spring 433 is further compressed to ensure the supporting effect of the movable arm 42 and the longitudinal positioning accuracy.

[0085] like Figure 7 , Figure 8 As shown, a sliding portion 4361 is provided at one end of the connecting rod 436, and the sliding portion 4361 is slidably connected to the movable cavity 4341. A limiting groove 4363 is axially provided on the sliding portion 4361, and a socket 4343 is provided on the movable cavity 4341. The limiting plug-in 435 is installed in the socket 4343 and the end portion cooperates with the limiting groove 4363.

[0086] The upper limit block 452 and the lower limit block 453 are made of non-metallic materials, such as rubber, nylon and other non-metallic materials with high elasticity and high toughness. The limit plug 435 is a bolt structure, and the limit plug 435 is threadedly connected to the socket 4343. The length of the limit slot 4363 is related to the deformable amount of the coil spring 433 in the elastic structure 43 after assembly. The design stroke of the limit plug 435 in the limit slot 4363 is L. Figure 8 As shown, during the assembly process, the stroke of the limit plug 435 in the limit groove 4363 is less than the designed stroke L, and during the deformation of the elastic structure 43 during the assembly process, the limit plug 435 and the two ends of the limit groove 4363 are not in contact. The elastic structure 43 has good buffering properties during the overall elastic deformation process. Combined with the buffering and limiting effects of the upper limit block 452 and the lower limit block 453, the noise and flexibility of the swinging process of the movable arm 42 of the floating support structure 4 during the assembly process are better.

[0087] like Figure 7 , Figure 8 As shown, an oil groove 4362 is provided along the circumference of the outer wall of the sliding portion 4361, and an oil nozzle 437 is provided on the connecting cylinder 434. When the compression amount in the compression state is the smallest, the oil groove 4362 corresponds to the oil nozzle 437.

[0088] An oil hole 4342 is provided on the cylinder wall of the connecting cylinder 434 , an oil nozzle 437 is installed on the oil hole 4342 , and the oil hole 4342 connects the oil nozzle 437 with the movable chamber 4341 .

[0089] When the compression amount of the helical spring 433 in the compressed state is the minimum, Figure 7As shown, the limiting plug-in 435 contacts one end of the limiting groove 4363. At this time, the oil nozzle 437 corresponds to the oil groove 4362, which is convenient for adding sufficient oil into the oil groove 4362 to ensure smooth sliding connection between the connecting rod 436 and the movable cavity 4341.

[0090] like Figure 6 , Fig. 9 As shown, the lower surface of the movable arm 42 is a plane, the portion of the lower limit block 453 corresponding to the lower surface of the movable arm 42 is set as a cylindrical surface, and the contact mode between the movable arm 42 and the lower limit block 453 is line contact, which is convenient for the adaptation of the lower limit block 453 and the movable arm 42.

[0091] Embodiment three:

[0092] In order to further simplify the installation method and connection structure of the floating support structure 4, based on the second embodiment, as shown in FIG. Figure 4-Figure 6 As shown, the elastic structure 43 of this embodiment further includes a connecting frame 431 detachably connected to the movable arm 42, and the connecting frame 431 is hinged to the end of the connecting rod 436;

[0093] The floating support structure 4 also includes a base plate 46, which is fixedly connected to the bracket body 2. The limiting structure 45 includes a mounting frame 451, and the upper limit block 452 and the lower limit block 453 are both installed on the mounting frame 451. The mounting frame 451 and the base plate 46 are detachably connected by fasteners. The support block 44 is detachably connected to the movable arm 42 by fasteners, and the connecting cylinder 434 is hinged to the mounting frame 451.

[0094] like Fig.10 As shown, a first connecting hole 460 corresponding to the mounting frame 451 is provided on the base plate 46, a second connecting hole 460 corresponding to the connecting frame 431 is provided on the movable arm 42, and a third connecting hole 420 corresponding to the support block 44 is provided on the movable arm 42. The first connecting hole 460 and the second connecting hole are used to change the position of the elastic structure 43 and the limiting structure 45 relative to the base plate 46, and the third connecting hole 420 is used to change the position of the support block 44 on the movable arm 42.

[0095] Specifically, under the limiting action of the upper limit block 452, the initial state of the movable arm 42 is a horizontal state, or it can be other specific angles; the third connecting hole position 420 is used for the detachable installation support block 44, and the third connecting hole position 420 is a hole group or an oblong hole corresponding to the fastener, which is used to adjust the position of the support block 44 on the movable arm 42; the first connecting hole position 460 is used to fasten the mounting frame 451 to the base plate 46, and the second connecting hole position is used to fasten the connecting frame 431 to the movable arm 42. The first connecting hole position 460 and the second connecting hole position are both hole groups or oblong holes corresponding to the fastener, which is convenient for changing the installation position of the mounting frame 451 and the connecting frame 431 relative to the base plate 46. At the same time, the contact surface between the lower limit block 453 and the movable arm 42 is a cylindrical surface, so that the swing angle and support position of the movable arm 42 can be directly adjusted, so that the design of the floating support structure 4 is modular and can be suitable for suspension systems 1 of different specifications. The first connection hole position 460, the second connection hole position and the third connection hole position 420 preferably adopt a hole group structure, such as Fig.10 shown.

[0096] The assembly process of the floating support structure 4 of this embodiment is as follows:

[0097] First, the hinge seat 41 is installed on the base plate 46, and the movable arm 42 is hinged to the hinge seat 41;

[0098] One end of the elastic structure 43 is hinged to the mounting frame 451, and the other end of the elastic structure 43 is provided with a connecting frame 431;

[0099] Then, the installation positions of the elastic structure 43 and the limiting structure 45 are selected according to the swing angle of the lower swing arm 14, and the connecting frame 431 is connected to the corresponding position of the second connecting hole on the movable arm 42, and the movable arm 42 is placed between the upper limit block 452 and the lower limit block 453;

[0100] Finally, the mounting frame 451 is connected to the corresponding position of the first connecting hole 460 on the base plate 46 by bolts. During the process of tightening the bolts, the coil spring 433 in the elastic structure 43 is further compressed under the limit of the upper limit block 452. After the mounting frame 451 is installed, the movable arm 42 is in the initial state.

[0101] The position of the support block 44 on the movable arm 42 is selected according to the support position of the lower swing arm 14, the corresponding position of the third connection hole 420 is selected, and then bolt connection is adopted.

[0102] Finally, the base plate 46 is mounted on the bracket body 2 .

[0103] The floating support structure 4 of the present embodiment includes a base plate 46, on which a first connection hole 460 and a second connection hole for adjusting the position of the elastic structure 43 are arranged, and in combination with the contact surface between the lower limit block 453 and the movable arm 42 being a cylindrical surface, the swing angle of the movable arm 42 can be directly adjusted. Meanwhile, a third connection hole 420 for adjusting the position of the support block 44 is arranged on the movable arm 42, and the support position can be directly adjusted, so that the design of the floating support structure 4 is modularized and can be applied to suspension systems 1 of different specifications. The floating support structure 4 can also be installed on the bracket body 2 after being adjusted, thereby simplifying the design and assembly procedures.

[0104] Embodiment 4:

[0105] The chassis assembly method of this embodiment includes the following steps:

[0106] The chassis arrives at the assembly station, and at the same time, the suspension system support frame of any of the above-mentioned embodiments equipped with the suspension system 1 is transported to the assembly station by the conveyor line, the subframe 13 of the suspension system 1 is supported by the floating support structure 4, and the suspension spring 11 corresponds to the connection position of the vehicle body;

[0107] The lifting mechanism of the assembly station lifts the suspension system support frame, so that the suspension system 1 moves upward, and the suspension spring 11 contacts the chassis;

[0108] After the suspension spring 11 contacts the chassis, the lifting mechanism continues to work to fit the subframe 13 of the suspension system 1 with the chassis. During the process from the suspension spring 11 contacts the vehicle body to the subframe 13 fitting with the chassis, the suspension spring 11 is subjected to a downward external force, and the floating support structure 4 swings downward with the lower control arm 14, providing space for the swing of the lower control arm 14 and reducing the deformation of the suspension spring 11.

[0109] During the assembly of the suspension system 1 and the chassis, the guide positioning structure on the bracket body 2 cooperates with the chassis to position the rigid connection structure of the two.

[0110] By arranging a floating support structure 4 for floatingly supporting the lower arm 14 on the suspension system support frame, the state of the front suspension system 1 is maintained by elastic force, and the positioning of the connection part is realized. During the assembly process of the suspension system 1 and the chassis, the jacking structure lifts the suspension system 1 so that the suspension spring 11 contacts the chassis and is subjected to force. Then, the floating support structure 4 causes the lower arm 14 to swing, reducing the deformation of the suspension spring 11, thereby reducing the lifting force required by the jacking mechanism during the assembly process, and at the same time facilitating the adjustment of the contact position of the suspension spring 11 with the chassis.

[0111] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. A suspension system support frame, characterized in that: include A support body (2), the support body (2) being used to carry the suspension system (1); A support positioning structure (3) is arranged on the support body (2) and cooperates with the sub-frame (13) of the suspension system (1) to position and support the sub-frame (13); A floating support structure (4), arranged on the support body (2), and used for supporting a lower swing arm (14) of the suspension system (1); When the upper end of the suspension spring (11) of the suspension system (1) is in a free state, the lower swing arm (14) is in a balanced state under the support of the floating support structure (4); after the suspension spring (11) is subjected to a downward external force, the floating support structure (4) swings downward along with the lower swing arm (14).

2. The suspension system support frame according to claim 1, characterized in that: The structure of the floating support structure (4) comprises: A support block (44), the support block (44) being in contact with a lower surface of a middle portion of the lower swing arm (14); A movable arm (42), one end of the movable arm (42) being movably connected to the bracket body (2), and the other end of the movable arm (42) being provided with the supporting block (44); an elastic structure (43), one end of the elastic structure (43) being connected to the movable arm (42), and the other end of the elastic structure (43) being connected to the bracket body (2); The elastic structure (43) provides an upward elastic force to support the lower swing arm (14) through the movable arm (42) and the support block (44), and the elastic structure (43) provides a compressive deformation amount, so that when the lower swing arm (14) swings downward under the action of an external force, the posture of the movable arm (42) changes to change the height of the support block (44).

3. The suspension system support frame according to claim 2, characterized in that: It also includes an articulated seat (41) arranged on the support body (2), one end of the movable arm (42) is articulated to the articulated seat (41), one end of the elastic structure (43) is articulated to the movable arm (42), the other end of the elastic structure (43) is articulated to the support body (2), the elastic structure (43) provides an upward elastic force, and when the lower swing arm (14) swings downward under the action of an external force, the movable arm (42) swings around the articulated seat (41); A limiting structure (45) is detachably mounted on the bracket body (2), and the limiting structure (45) comprises an upper limit block (452) and a lower limit block (453). The upper limit block (452) corresponds to the upper surface of the movable arm (42) and is used to limit the upper limit position of the swing of the movable arm (42); the lower limit block (453) corresponds to the lower surface of the movable arm (42) and is used to limit the lower limit position of the swing of the movable arm (42).

4. The suspension system support frame according to claim 3, characterized in that: The elastic structure (43) comprises a connecting cylinder (434) and a connecting rod (436); one end of the connecting cylinder (434) is hinged to the bracket body (2); a movable chamber (4341) is provided in the connecting cylinder (434); one end of the connecting rod (436) is hinged to the movable arm (42); the other end of the connecting rod (436) is slidably connected to the movable chamber (4341); and a limiting plate (432) is provided on the connecting rod (436); A coil spring (433) is sleeved on the connecting rod (436), one end of the coil spring (433) abuts against the end of the connecting cylinder (434), and the other end of the coil spring (433) abuts against the limiting plate (432). The connecting cylinder (434) is provided with a limiting plug-in (435) that cooperates with the connecting rod (436) inside the movable chamber (4341), and the limiting plug-in (435) is used to put the coil spring (433) in a compressed state.

5. The suspension system support frame according to claim 4, characterized in that: A sliding portion (4361) is provided at one end of the connecting rod (436), and the sliding portion (4361) is slidably connected to the movable cavity (4341). A limiting groove (4363) is axially provided on the sliding portion (4361), and a socket (4343) is provided on the movable cavity (4341). The limiting plug-in (435) is installed in the socket (4343) and its end portion cooperates with the limiting groove (4363).

6. The suspension system support frame according to claim 5, characterized in that: An oil groove (4362) is circumferentially arranged along the outer wall of the sliding portion (4361), and an oil nozzle (437) is arranged on the connecting cylinder (434). When the compression amount in the compression state is minimum, the oil groove (4362) corresponds to the oil nozzle (437).

7. The suspension system support frame according to claim 3, characterized in that: The lower surface of the movable arm (42) is a plane, the portion of the lower limit block (453) corresponding to the lower surface of the movable arm (42) is set as a cylindrical surface, and the contact mode between the movable arm (42) and the lower limit block (453) is line contact.

8. The suspension system support frame according to claim 7, characterized in that: The elastic structure (43) further comprises a connecting frame (431) detachably connected to the movable arm (42), wherein the connecting frame (431) is hinged to the end of the connecting rod (436); The floating support structure (4) also includes a base plate (46), the base plate (46) is fixedly connected to the bracket body (2), the hinge seat (41) is fixedly connected to the base plate (46), the limiting structure (45) includes a mounting frame (451), the upper limit block (452) and the lower limit block (453) are both installed on the mounting frame (451), the mounting frame (451) and the base plate (46) are detachably connected via fasteners, the support block (44) is detachably connected to the movable arm (42) via fasteners, and the connecting cylinder (434) is hinged to the mounting frame (451).

9. The suspension system support frame according to claim 8, characterized in that: The base plate (46) is provided with a first connection hole position (460) corresponding to the mounting frame (451), the movable arm (42) is provided with a second connection hole position corresponding to the connecting frame (431), and the movable arm (42) is provided with a third connection hole position (420) corresponding to the supporting block (44), the first connection hole position (460) and the second connection hole position are used to change the position of the elastic structure (43) and the limiting structure (45) relative to the base plate (46), and the third connection hole position (420) is used to change the position of the supporting block (44) on the movable arm (42).

10. A chassis assembly method, characterized in that: The following steps are involved: The chassis arrives at the assembly station, and at the same time, the suspension system support frame equipped with the suspension system (1) is transported to the assembly station by the conveyor line, the subframe (13) of the suspension system (1) is supported by the floating support structure (4), and the suspension spring (11) corresponds to the connection position of the vehicle body; The lifting mechanism of the assembly station lifts the suspension system support frame, so that the suspension system (1) moves upward and the suspension spring (11) contacts the chassis; After the suspension spring (11) contacts the chassis, the lifting mechanism continues to work to fit the subframe (13) of the suspension system (1) to the chassis. During the process from the suspension spring (11) contacts the vehicle body to the subframe (13) fitting to the chassis, the suspension spring (11) is subjected to a downward external force, and the floating support structure (4) swings downward along with the lower swing arm (14), thereby reducing the deformation of the suspension spring (11).

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