A rear suspension assembly lifting device

Abstract

The present invention provides a rear suspension assembly lifting device. A rear suspension assembly lifting device includes a suspended balancing assist mechanism and an operating mechanism, wherein the operating mechanism includes a frame, a hook, a power mechanism, a screw rod, a slider and a lifting structure, wherein the hook is located at the top of the frame, and the bottom of the frame is connected to the balancing assist mechanism, the screw rod and the power mechanism are connected via a universal joint transmission, the slider is connected to the screw rod via an internal thread, the slider is hinged to the lifting structure, the lifting structure is hinged to the frame, and the slider moves on the screw rod to drive the lifting of the lifting structure. The present invention adopts an operating mechanism with an ingenious structure, which is convenient for the operator to operate the equipment more flexibly, has a strong ergonomic operation, and helps to reduce the fatigue intensity of the operating personnel.

Description

Technical Field

[0001] The invention relates to the field of automobile manufacturing, and more specifically to a rear suspension assembly lifting device. Background Art

[0002] When the multi-link rear suspension assembly is assembled on the rear suspension sub-assembly line in the general assembly workshop, a special rear suspension 1G holding fixture needs to be installed on the rear suspension assembly to ensure that the rear suspension assembly remains in the 1G state and improve its passability when flowing on the main line (chassis line). After the vehicle passes the chassis line, it is necessary to use an external mechanism to compress the rear suspension coil spring again and keep the rear suspension assembly in the 1G state, so that the operator can remove the rear suspension 1G holding fixture conveniently.

[0003] At present, the main technical means are to use ground-based special lifting equipment with special hooks to maintain the 1G state of the multi-link rear suspension assembly. One end of the special hook is connected to the main body of the equipment, and the other end is hung on the crossbeam of the rear subframe welding assembly; or the lifting mechanism is set on both sides of the chassis assembly line roller bed to achieve left and right independent lifting control, and at the same time, the hook connected to the base plate of the assembly sled tray is used to limit the lifting height of the rear subframe, so as to achieve the compression of the rear subframe lower arm to 1G state while maintaining the horizontal posture of the rear subframe (body). However, there are defects such as poor operator ergonomics and high fatigue intensity during use; poor durability and frequent maintenance; large footprint and loss of one parking space; the equipment is relatively heavy, the operator ergonomics is poor, the alignment accuracy is difficult to control, and the operation is inconvenient, which makes the operator's fatigue intensity high; it has a great impact on the accuracy of the assembly sled base plate, thereby affecting the assembly accuracy; and poor production capacity of multiple models on the same line. Summary of the invention

[0004] The present invention provides a rear suspension assembly lifting device to overcome the defects of the equipment described in the above background technology, such as being relatively bulky, having poor ergonomics, inconvenient operation, and high fatigue strength. The present invention adopts an operating mechanism with an ingenious structure, which is convenient for operators to operate the equipment more flexibly, has strong ergonomics, and helps to reduce the fatigue strength of operators.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a rear suspension assembly lifting device, including an operating mechanism and a balancing assisting mechanism suspended on a workshop production line, the operating mechanism including a frame, a hook, a power mechanism, a screw rod, a slider and a lifting structure, the hook is located at the top of the frame, the top of the frame is connected to the balancing assisting mechanism, the screw rod and the power mechanism are connected through a universal joint transmission, the slider is connected to the screw rod through an internal thread, the slider is hinged to the lifting structure, the lifting structure is hinged to the frame, and the slider moves on the screw rod to drive the lifting structure to rise and fall. In this way, the balanced power-assist system of the suspension can provide a supporting force for the operating mechanism. The frame is the main frame structure of the operating mechanism, which is used to install the motor, the control switch panel, the hook, etc. The chassis of the frame is fixed on the balanced power-assist system, and a screw rod, a slider and a jacking structure are respectively arranged on both sides of the bracket. When working, the hook is hung on the sub-frame welding assembly crossbeam of the rear suspension assembly, and the power mechanism is started and controlled to drive the screw rod to drive, and the screw rod drives the slider to move. The ball screw structure composed of the screw rod and the slider can reduce resistance. The slider and the jacking structure are hinged, and the jacking structure and the frame are connected. The lifting mechanism is hinged, and the lead screw and the power mechanism are connected by a universal joint. This ingenious connection method enables the movement of the slider to drive the lifting of the jacking structure. The lifting part of the jacking structure is aligned with the lower swing arm of the rear suspension assembly. The lifting of the jacking structure can lift the lower swing arm in the rear suspension assembly from both sides, so that the rear suspension assembly reaches the 1G state, compressing the rear suspension coil spring to facilitate the operator to remove the rear suspension 1G holding clamp; the use of an ingeniously structured operating mechanism is convenient for the operator to operate the equipment more flexibly, the operation is highly ergonomic, and it helps to reduce the fatigue intensity of the operators.

[0006] Furthermore, the balancing assist mechanism includes a balancing cylinder and a balancing arm. The balancing cylinder is suspended on the main line of the general assembly workshop through the balancing arm, and the bottom of the frame is connected to the balancing cylinder. In this way, the balancing bar is generally a straight plate-type structure, the length of which is slightly larger than the width of the car, and the two ends are connected to the balancing arm. The balancing cylinder provides a working platform for the entire operating mechanism. The balancing bar can make the base of the operating mechanism in a horizontal position, so that the jacking structures on both sides can be in the same horizontal state when the rear suspension assembly reaches the 1G state, and the jacking effect is more stable; because the entire device is suspended and does not occupy a workstation, the staff can operate while standing without bending over, which reduces consumption;

[0007] Furthermore, the lifting structure includes a swing arm and a lifting block. The swing arm includes a first arm, a second arm and a third arm that are not in the same straight line. The two ends of the second arm are respectively fixedly connected to the first arm and the second arm. The end of the first arm away from the second arm is hinged to the slider. The end of the third arm away from the second arm is hinged to the rotating shaft provided on the frame. The lifting block is provided on the second arm. The lifting block is used to lift the rear suspension assembly of the car. In this way, the two ends of the swing arm can rotate on the slider and the frame respectively. When the slider moves, it takes the swing arm to make a "Z"-shaped movement. The distance position of the swing arm is set so that when the second arm is swung to a horizontal position, the lifting block is just aligned with the pressed position of the lower swing arm of the rear suspension assembly.

[0008] Furthermore, the lifting block is a cubic structure with a cylindrical platform on the top, and the bottom of the lifting block is connected to the second arm.

[0009] Preferably, the lifting block is made of nylon material. In this way, the nylon material can reduce friction and avoid external injuries to the lower swing arm parts during the lifting process, thereby increasing practical safety.

[0010] Furthermore, the second arm is provided with a guide rail for use with the jacking block, and limit structures are provided at both ends of the guide rail. The side of the jacking block is connected to the limit structure through a reset device. In this way, the design of the guide rail can realize the co-linear production of vehicle models with different wheelbases on the same platform, and prevent direct dry friction between the rear lower swing arm and the jacking block. During the pressing process between the jacking block and the lower swing arm of the rear suspension assembly, relative displacement will occur. When the operation is continuous, the position of the jacking block may deviate too much, so a reset device is added. When the jacking block is offset, the reset device will be elastically deformed. When the jacking block and the lower swing arm of the rear suspension assembly are released, the reset device will reset the jacking block.

[0011] Preferably, the resetting device is a spring.

[0012] Furthermore, the power mechanism includes a servo motor, a reducer and a control switch, the reducer and the servo motor are combined to use centralized power output, and the control switch controls the power output of the power mechanism. In this way, the servo motor outputs power, the reducer controls the output speed and transmission torque, and the control switch can control the start and stop of the power output of the power mechanism and the output size.

[0013] Furthermore, the swing arm is provided with an induction switch, which is connected to the control switch and controls its start and stop. In this way, the induction switch is generally set at the position where the swing arm is connected to the frame, and the induction switch can touch the induction bracket provided on the frame during the swing arm rotation process. When the swing arm reaches the position where the jacking block can make the rear suspension assembly reach the 1G state, the induction switch is activated, so that the control switch is closed, and the jacking structure no longer rises, thereby ensuring the safety of the operation.

[0014] Furthermore, the hook is made of alloy quenched and tempered steel. In this way, the hook material has better toughness and strength, and the design of the hook ensures that the lower arm moves relative to the subframe without lifting the entire vehicle body.

[0015] Compared with the prior art, the beneficial effects are:

[0016] 1. The use of a suspended balancer allows the operator to operate the equipment more flexibly, and the operator can just step on the ground without having to bend down to work, which helps reduce the fatigue intensity of the equipment. The equipment can be moved to the side of the main line through the balance arm without occupying the main line parking space, increasing the space for arranging other operations on the main line.

[0017] 2. The coordinated use of guide rails and sliders can realize the co-production of models with different wheelbases on the same platform, and prevent direct dry friction between the rear lower control arm and the jacking block.

[0018] 3. The lifting block is made of nylon, which can reduce friction and avoid external damage to the lower arm parts during the lifting process, increasing practical safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view structural schematic diagram of the operating mechanism in the present invention.

[0020] Figure 2 It is a rear view structural schematic diagram of the operating mechanism in the present invention.

[0021] Figure 3 It is a structural schematic diagram of the jacking block in the present invention.

[0022] Figure 4 It is a schematic diagram of the overall structure of the present invention in use. DETAILED DESCRIPTION

[0023] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0024] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0025] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0026] This embodiment provides a rear suspension assembly lifting device. Figure 1-4 As shown, a rear suspension assembly lifting device includes a balancing assist mechanism and an operating mechanism 11 suspended on the main line of the general assembly workshop. The operating mechanism 11 includes a frame 9, a hook 8, a power mechanism 1, a screw rod 2, a slider 3 and a lifting structure. The hook 8 is located at the top of the frame 9, and the top of the frame 9 is connected to the balancing assist mechanism. The power mechanism 1 is fixed to the frame 9. The screw rod 2 is connected to the power mechanism 1 through a universal joint transmission. The slider 3 is connected to the screw rod 2 through an internal thread. The slider 3 is hinged to the lifting structure, and the lifting structure is hinged to the frame 9. The slider 3 moves on the screw rod 2 to drive the lifting of the lifting structure. The hook 8 is made of alloy quenched and tempered steel; the power mechanism 1 includes a servo motor, a reducer and a control switch. The reducer and the servo motor are combined to use centralized power output, and the control switch controls the power output of the power mechanism 1.

[0027] In this embodiment, the balancing assist mechanism includes a balancing cylinder 22 and a balancing arm 21, the balancing cylinder 22 is suspended on the main line of the assembly workshop through the balancing arm 21, and the bottom of the frame 9 is connected to the balancing cylinder 22; the lifting structure includes a swing arm and a lifting block 6, the swing arm includes a first arm 4, a second arm 5 and a third arm 7 which are not in the same straight line, the two ends of the second arm 5 are respectively fixedly connected to one end of the first arm 4 and the second arm 5, the other end of the first arm 4 is hinged to the slider 3, the third arm 7 is hinged to the rotating shaft provided on the frame 9, and the second arm 5 is provided with the lifting block 6. The lifting block 6 is a cubic structure with a truncated cone on the top, and the bottom of the lifting block 6 is connected to the second arm 5. The lifting block 6 is made of nylon. The second arm 5 is provided with a guide rail 10 used in conjunction with the lifting block 6, and the two ends of the guide rail 10 are provided with a limiting structure, and the side wall of the lifting block 6 is connected to the limiting structure through a spring 12. The swing arm is provided with an induction switch, which is connected to the control switch and controls its start and stop. When the swing arm reaches a position where the lifting block 6 can make the rear suspension assembly reach the 1G state, the induction switch acts to close the control switch, and the lifting structure no longer rises, thereby ensuring the safety of the operation.

[0028] During the working process, the balance assist system of the suspension can provide a supporting force to the operating mechanism 11, because the screw rod 2, the slider 3 and the lifting structure are respectively arranged on both sides of the frame 9, and the rear suspension assembly of the car is lifted from both sides to achieve a balanced state. Before the operation, the hook 8 is hung on the sub-frame welding assembly crossbeam of the rear suspension assembly, the control switch is started and the power mechanism 1 is controlled to drive the screw rod 2 to transmit, and the screw rod 2 drives the slider 3 to move. A ball is added to the threaded connection between the screw rod 2 and the slider 3, so that the screw rod 2 and the slider 3 form a ball screw 2 type The structure can reduce resistance. The slider 3 is hinged to the lifting structure, the lifting structure is hinged to the frame 9, and the screw rod 2 is connected to the power mechanism 1 through a universal joint. This clever connection method allows the movement of the slider 3 to drive the movement of the lifting structure, so that the two ends of the swing arm in the lifting structure can rotate on the slider 3 and the frame 9 respectively, and the swing arm can do a "Z" movement. The distance position of the swing arm is set so that when the second arm 5 is swung to a horizontal position, it is just aligned with the pressed position of the lower swing arm of the rear suspension assembly. Aligning the truncated cone part of the lifting block 6 of the lifting structure with the lower swing arm of the rear suspension assembly can reduce the relative displacement of the rear suspension assembly. The lifting block 6 can lift the lower swing arm in the rear suspension assembly from both sides, so that the rear suspension assembly reaches the 1G state, compressing the rear suspension coil spring to facilitate the operator to remove the rear suspension 1G holding clamp.

[0029] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A rear suspension assembly lifting device, characterized in that: It includes an operating mechanism and a balancing assisting mechanism suspended on the main line of the general assembly workshop, the operating mechanism includes a frame, a hook, a power mechanism, a screw rod, a slider and a lifting structure, the hook is located at the top of the frame, the bottom of the frame is connected to the balancing assisting mechanism, the power mechanism is fixed to the frame, the screw rod and the power mechanism are connected through a universal joint transmission, the slider is connected to the screw rod through an internal thread, one end of the lifting structure is hinged to the slider, and the other end is hinged to the frame, and the slider moves on the screw rod to synchronously drive the lifting and lowering movement of the lifting structure.

2. The rear suspension assembly lifting device according to claim 1, characterized in that: The balancing assist mechanism comprises a balancing cylinder and a balancing arm. The balancing cylinder is suspended on the main line of the general assembly workshop through the balancing arm, and the bottom of the frame is connected to the balancing cylinder.

3. The rear suspension assembly lifting device according to claim 1, characterized in that: The jacking structure includes a swing arm and a jacking block. The swing arm includes a first arm, a second arm and a third arm that are not on the same straight line. The two ends of the second arm are respectively fixedly connected to the first arm and the second arm. The end of the first arm away from the second arm is hinged to the slider, and the end of the third arm away from the second arm is hinged to the rotating shaft provided on the frame. The jacking block is provided on the second arm, and the jacking block is used to jack up the rear suspension assembly of the car.

4. The rear suspension assembly lifting device according to claim 3 is characterized in that: The lifting block is a cubic structure with a cylindrical platform on the top, and the bottom surface of the lifting block is connected to the second arm.

5. The rear suspension assembly lifting device according to claim 3, characterized in that: The lifting block is made of nylon.

6. The rear suspension assembly lifting device according to claim 4, characterized in that: The second arm is provided with a guide rail used in conjunction with the lifting block, and limiting structures are provided at both ends of the guide rail. The lifting block is connected to the limiting structure via a reset device.

7. The rear suspension assembly lifting device according to claim 6, characterized in that: The reset device is a spring.

8. The rear suspension assembly lifting device according to claim 3, characterized in that: The power mechanism comprises a servo motor, a reducer and a control switch. The reducer and the servo motor are combined to achieve centralized power output, and the control switch controls the power output of the power mechanism.

9. The rear suspension assembly lifting device according to claim 8, characterized in that: The swing arm is provided with an induction switch, which is connected to the control switch and controls the start and stop of the control switch.

10. The rear suspension assembly lifting device according to claim 1, characterized in that: The hook is made of alloy quenched and tempered steel.

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