Automobile suspension welding device

Abstract

The invention provides an automobile suspension welding device. The automobile suspension welding device comprises a rack, a sleeve positioning mechanism, a body clamping mechanism and a welding mechanism. The sleeve positioning mechanism comprises a base, a centering assembly, an axial pressing assembly, a triggering assembly and a driving assembly. The body clamping mechanism clamps a control arm body on the automobile suspension and controls the control arm body to abut against the positioned sleeve. The welding mechanism is used for welding the joint of the control arm body and the sleeve; according to the device, radial self-adaptive positioning, axial precise limiting and stable butt joint of the sleeve and the control arm body are achieved in the whole process, a positioning expansion pin does not need to be customized, the device can be rapidly matched with the sleeves with different pipe diameters and different length specifications, the accessory cost is greatly reduced, the replacement time is greatly shortened, and the production efficiency and welding precision of control arm sleeve welding are improved; the technical problems that a traditional welding device is poor in universality, positioning parts need to be replaced when the traditional welding device is matched with sleeves of different specifications, and production efficiency is low are solved.

Description

Technical Field

[0001] This invention relates to the field of automotive suspension welding technology, and more specifically to an automotive suspension welding apparatus. Background Technology

[0002] The automotive suspension is the core force transmission and guidance device connecting the vehicle body and the wheels. It is used to buffer road impacts, transmit vertical, longitudinal and lateral loads, and constrain the wheel movement trajectory to ensure vehicle driving stability, handling and ride comfort. Its structural performance directly determines the working quality of the vehicle chassis. As a key guiding and force transmission component in the suspension system, the control arm connects to the wheel steering knuckle through the bushing of the vehicle body or subframe on one end. It undertakes the core role of transmitting wheel forces, limiting wheel movement patterns and maintaining wheel alignment parameters. It is a key component for the suspension to achieve mechanical transmission and motion control.

[0003] In the production process of control arms for automotive suspensions, it is usually necessary to weld sleeves onto the control arm body. For example, patent CN114769821B discloses a welding fixture for automotive control arm sleeves, including an upper fixture and a lower fixture. The lower fixture includes a first angle adjustment component, a second angle adjustment component, and a fixing component. The fixing component is connected to the first angle adjustment component through the second angle adjustment component. The first angle adjustment component includes a fixed support frame, a first angle adjustment plate, and a first angle adjustment device. The fixed support frame can be fixed on a worktable, and the first angle adjustment plate is mounted on the fixed support frame through the first angle adjustment device. The second angle adjustment component includes a main mounting plate and a second angle adjustment device. The main mounting plate is mounted on the first angle adjustment plate through the second angle adjustment device. The fixing component is mounted on the main mounting plate and is used to connect with the upper fixture to clamp the control arm sleeve.

[0004] However, when such welding equipment is used to position the sleeve, the positioning expansion pin is a customized structural design. When the control arm sleeve with different pipe diameters and lengths is processed and replaced, the matching positioning expansion pin must be replaced simultaneously. This makes it impossible to quickly adapt to different specifications of sleeves, resulting in poor versatility. This not only increases the time and cost of replacement and parts, but also reduces the overall welding production efficiency of the control arm sleeve. Summary of the Invention

[0005] In view of the above-mentioned problems in the existing technology, the technical problem to be solved by the present invention is that: when the existing welding device performs positioning operation on the sleeve, its positioning expansion pin is a customized structural design. When processing and changing to control arm sleeves with different pipe diameters and lengths, the matching positioning expansion pins need to be replaced simultaneously. This cannot achieve rapid adaptation to different specifications of sleeves, resulting in poor versatility. This not only increases the time cost and parts cost of replacement, but also reduces the overall welding production efficiency of control arm sleeves.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an automotive suspension welding device, comprising: frame; A sleeve positioning mechanism includes: a base, a centering assembly, an axial clamping assembly, a triggering assembly, and a driving assembly; the base is mounted on a frame; the centering assembly includes multiple circumferentially distributed positioning units, each positioning unit including a slider and a positioning rod; the slider is slidably mounted on the base along the radial direction of the centering assembly; the positioning rod is slidably mounted on the slider along the sliding direction of the slider, and the positioning rod is perpendicular to the base; the axial clamping assembly is slidably mounted on multiple positioning rods along the length direction of the positioning rods; the driving assembly drives multiple sliders to slide synchronously; after multiple positioning rods abut against the inner wall of the sleeve, and the positioning rod slides to its limit position on the slider, the triggering assembly triggers the axial clamping assembly to clamp the sleeve; The main body clamping mechanism clamps the control arm body on the vehicle suspension and controls the control arm body to abut against the positioned sleeve; and The welding mechanism welds the connection between the control arm body and the sleeve.

[0007] Preferably, the axial clamping assembly includes: a lower pressure sleeve, a transmission arm, a mounting base, and a tension spring; the lower pressure sleeve and the transmission arm are respectively arranged in a one-to-one correspondence with the positioning rod; the lower pressure sleeve is slidably sleeved on the positioning rod and one end of the transmission arm is hinged to the lower pressure sleeve; the lower end of the tension spring is fixed on the base, the upper end of the tension spring is fixed to the mounting base, and the other ends of the plurality of transmission arms away from the lower pressure sleeve are hinged to the mounting base; the triggering assembly controls the fixing and separation of the lower pressure sleeve and the positioning rod.

[0008] Preferably, the triggering assembly includes multiple triggering units corresponding one-to-one with the positioning rods. Each triggering unit includes: a limiting block, a return spring, a gear, a rotating shaft, a pull rope, a rack, a first piston, a second piston, and a limiting spring. One end of the limiting block is slidably inserted into the positioning rod along the sliding direction of the slider. The lower edge of the other end of the limiting block is provided with a slope, and a limiting groove that mates with the other end of the limiting block is formed on the inner wall of the lower pressure sleeve. The return spring applies an outward elastic force to the limiting block. The rotating shaft is rotatably mounted on the positioning rod, and the gear is coaxially fixed with the rotating shaft. One end of the pull rope is fixed to the rotating shaft, and the pull rope... The other end is fixed to one end of the inner side of the limiting block to pull the limiting block inward; the rack is slidably mounted on the positioning rod in the vertical direction, and the rack and the gear are meshed with each other; the positioning rod has a first cavity and a second cavity that are interconnected; one end of the first piston is slidably mounted in the first cavity along the sliding direction of the slider, and the other end of the first piston is fixed on the side of the positioning rod away from the center of the centering assembly; the limiting spring applies a spring force to the first piston that slides away from the positioning rod; the second piston is slidably mounted in the second cavity, and the second piston is fixedly connected to the rack.

[0009] Preferably, the drive assembly includes: a lead screw, a nut seat, a connecting arm, and a motor; the lead screw is vertically and rotatably mounted on the base; the nut seat is threadedly connected to the lead screw; the connecting arm is configured to correspond one-to-one with the slider, one end of the connecting arm is hinged to the corresponding slider, and the other end of the connecting arm is hinged to the nut seat; the motor drives the lead screw to rotate.

[0010] Preferably, both ends of the positioning rod are provided with a slider, a lead screw, a nut seat and a connecting arm; and the two connecting arms are coaxially fixed.

[0011] Preferably, the body clamping mechanism includes: a gripper and a telescopic member; the gripper is mounted on the frame via the telescopic member, and the telescopic member extends and retracts in the direction of the sleeve positioning mechanism.

[0012] Preferably, it also includes a lifting assembly and a laser rangefinder; the body clamping mechanism is mounted on the frame via the lifting assembly, and the laser rangefinder is mounted on the base to measure the sliding distance of the lower sleeve to adjust the height of the body clamping mechanism on the lifting assembly, so that the control arm body on the body clamping mechanism is aligned with the sleeve in the height direction.

[0013] Preferably, the welding mechanism includes a robotic arm and a welding torch mounted on the robotic arm.

[0014] Compared with the prior art, the present invention has at least the following advantages: 1. In this invention, the entire process achieves radial adaptive positioning of the sleeve, precise axial limiting, and stable docking with the control arm body. No customized positioning expansion pins are required. It can quickly adapt to sleeves of different diameters and lengths, significantly reducing accessory costs and replacement time, improving the production efficiency and welding accuracy of control arm sleeve welding, and solving the technical problems of poor versatility of traditional welding devices, the need to replace positioning components when adapting to different sleeve specifications, and low production efficiency.

[0015] 2. In this invention, the driving component drives multiple circumferentially distributed sliders to slide synchronously along the radial direction of the base, causing the positioning rods to move synchronously away from the center until the multiple positioning rods are tightly abutted against the inner wall of the sleeve. The positioning rods slide to their limit positions on the sliders. At this time, the trigger component controls the lower pressure sleeve to be fixed to the positioning rods. The transmission arm stretches the tension spring under the action of the positioning rods, so that the tension spring is in a stored state. Then, the control component triggers an action to release the constraint on the mounting seat. The mounting seat slides downward under the elastic restoring force of the tension spring. The mounting seat drives the multiple transmission arms hinged to it to rotate synchronously. The transmission arms push the corresponding lower pressure sleeves to slide synchronously towards the base along the positioning rods. The multiple lower pressure sleeves synchronously abut against the end of the sleeve, axially limiting and accurately positioning the sleeve, ensuring that the welding reference of sleeves of different specifications is uniform and avoiding axial deviation. The storage and restoring action of the tension spring realizes the smooth sliding of the lower pressure sleeve. Its elastic force can make the axial pressing force of the lower pressure sleeve on the sleeve gentle and stable, preventing damage to the sleeve surface. At the same time, it can adapt to sleeves of different lengths without additional adjustment.

[0016] 3. In this invention, the triggering unit relies on pure mechanical linkage to achieve initial self-locking, precise radial positioning unlocking, and reset self-locking. It does not require external electrical control or sensors, and can be adapted to the positioning of sleeves with different inner diameter specifications, significantly improving the versatility of the device and the welding positioning accuracy, and effectively improving production efficiency.

[0017] 4. In this invention, the laser rangefinder sensor detects the sliding distance of the upper and lower pressure sleeves of the base in real time, accurately obtains the axial positioning height information of the sleeve, and feeds back the detection data to the lifting assembly. The lifting assembly adaptively adjusts the installation height of the main body clamping mechanism according to the actual sliding distance of the lower pressure sleeve, so that the control arm body clamped on the main body clamping mechanism is automatically aligned with the sleeve in the height direction, ensuring that the coaxiality and height position of the control arm body and the sleeve are accurately matched when they are docked, avoiding height deviation, misalignment or uneven gap, and effectively improving the welding and assembly accuracy.

[0018] 5. In this invention, the robotic arm can flexibly adjust its posture and position, driving the welding torch installed at its end to move precisely to the connection between the control arm body and the sleeve. With high-precision motion control, the robotic arm can achieve uniform and stable movement of the welding torch along the connection, ensuring that the welding trajectory is regular and the weld is uniform and full. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0020] Figure 1 This is a perspective view of an automotive suspension welding device provided in an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of the sleeve positioning mechanism provided in an embodiment of the present invention.

[0022] Figure 3 This is a partial structural diagram of the triggering component provided in an embodiment of the present invention.

[0023] Figure 4 This is a partial structural diagram of the triggering component provided in an embodiment of the present invention.

[0024] Reference numerals: 1. Frame; 2. Base; 3. Centering assembly; 31. Slider; 32. Positioning rod; 33. First cavity; 34. Second cavity; 4. Axial clamping assembly; 41. Lower pressure sleeve; 42. Transmission arm; 43. Mounting seat; 44. Tension spring; 5. Trigger assembly; 51. Limit block; 52. Return spring; 53. Gear; 54. Rotating shaft; 55. Pull rope; 56. Rack; 57. First piston; 58. Second piston; 59. Limit spring; 6. Drive assembly; 61. Lead screw; 62. Nut seat; 63. Connecting arm; 64. Motor; 7. Body clamping mechanism; 71. Gripper; 72. Telescopic component; 73. Lifting assembly; 74. Laser rangefinder sensor; 8. Welding mechanism; 81. Robotic arm; 82. Welding torch. Detailed Implementation

[0025] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0026] In this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] See Figures 1-4 The present invention provides an embodiment of an automotive suspension welding device, comprising: a frame 1, a sleeve positioning mechanism, a body clamping mechanism 7, and a welding mechanism 8; the sleeve positioning mechanism comprises: a base 2, a centering assembly 3, an axial pressing assembly 4, a triggering assembly 5, and a driving assembly 6; the base 2 is mounted on the frame 1; the centering assembly 3 comprises a plurality of circumferentially distributed positioning units, each positioning unit comprising: a slider 31 and a positioning rod 32; the slider 31 is slidably mounted on the base 2 along the radial direction of the centering assembly 3; the positioning rod 32 is slidably mounted on the slider 31 along the sliding direction of the slider 31. The positioning rod 32 is perpendicular to the base 2; the axial pressing assembly 4 is slidably installed on multiple positioning rods 32 along the length of the positioning rods 32; the driving assembly 6 drives multiple sliders 31 to slide synchronously; after multiple positioning rods 32 abut against the inner wall of the sleeve and the positioning rods 32 slide to the limit position on the sliders 31, the trigger assembly 5 triggers the axial pressing assembly 4 to press the sleeve; the body clamping mechanism 7 clamps the control arm body on the vehicle suspension and controls the control arm body to abut against the positioned sleeve; the welding mechanism 8 welds the connection between the control arm body and the sleeve.

[0029] In practice, the sleeve is fitted onto multiple positioning rods 32. Then, the drive assembly 6 drives multiple circumferentially distributed sliders 31 to slide synchronously along the radial direction of the base 2, causing the positioning rods 32 to move away from the center until the multiple positioning rods 32 are tightly abutted against the inner wall of the sleeve. The positioning rods 32 slide to their limit positions on the sliders 31, achieving automatic centering and radial adaptive positioning of the sleeve. This allows for adaptation to sleeves of different inner diameters without replacing the positioning components, effectively improving the device's versatility. Subsequently, the trigger assembly 5 triggers the axial clamping assembly 4 to perform axial limiting and precise positioning of the sleeve, ensuring accurate and uniform welding positions. The main body is then clamped. Mechanism 7 clamps the control arm body and drives the control arm body to stably abut against the positioned sleeve, ensuring a tight fit and no gaps or misalignment. Finally, welding mechanism 8 performs welding operations at the connection between the control arm body and the sleeve. The entire process achieves radial adaptive positioning of the sleeve, precise axial limiting, and stable docking with the control arm body. No customized positioning expansion pins are required, and it can quickly adapt to sleeves of different diameters and lengths, significantly reducing accessory costs and replacement time, improving the production efficiency and welding accuracy of control arm sleeve welding, and solving the technical problems of poor versatility of traditional welding devices, the need to replace positioning components when adapting to different sleeve specifications, and low production efficiency.

[0030] See Figures 1-4 In other embodiments, the axial pressing assembly 4 includes: a lower pressing sleeve 41, a transmission arm 42, a mounting base 43, and a tension spring 44; the lower pressing sleeve 41 and the transmission arm 42 are respectively arranged in a one-to-one correspondence with the positioning rod 32; the lower pressing sleeve 41 is slidably sleeved on the positioning rod 32 and one end of the transmission arm 42 is hinged to the lower pressing sleeve 41; the lower end of the tension spring 44 is fixed on the base 2, the upper end of the tension spring 44 is fixed to the mounting base 43, and the other end of the plurality of transmission arms 42 away from the lower pressing sleeve 41 is hinged to the mounting base 43; the trigger assembly 5 controls the fixing and separation of the lower pressing sleeve 41 and the positioning rod 32.

[0031] In practice, the sleeve is fitted onto multiple positioning rods 32. The drive assembly 6 drives multiple circumferentially distributed sliders 31 to slide synchronously along the radial direction of the base 2, causing the positioning rods 32 to move away from the center synchronously until the multiple positioning rods 32 are tightly abutted against the inner wall of the sleeve. The positioning rods 32 slide to their limit positions on the sliders 31. At this time, the trigger assembly 5 controls the lowering sleeve 41 to be fixed to the positioning rods 32. The transmission arm 42 stretches the tension spring 44 under the action of the positioning rods 32, so that the tension spring 44 is in a stored state. Then, the control assembly triggers the action to release the constraint on the mounting base 43. The mounting base 43 returns to its elastic restoring state under the action of the tension spring 44. When the mounting base 43 slides downwards (towards base 2), it drives the multiple transmission arms 42 hinged to it to rotate synchronously. The transmission arms 42 push the corresponding lower pressure sleeves 41 to slide synchronously towards base 2 along the positioning rod 32. The multiple lower pressure sleeves 41 simultaneously abut against the end of the sleeve, axially limiting and precisely positioning the sleeve, ensuring that the welding reference of sleeves of different specifications is uniform and avoiding axial deviation. The storage and reset action of the tension spring 44 realizes the smooth sliding of the lower pressure sleeve 41. Its elastic force can make the axial pressing force of the lower pressure sleeve 41 on the sleeve gentle and stable, preventing damage to the sleeve surface. At the same time, it can adapt to sleeves of different lengths without additional adjustment.

[0032] See Figures 1-4 In other embodiments, the trigger assembly 5 includes multiple trigger units corresponding one-to-one with the positioning rod 32. Each trigger unit includes: a limiting block 51, a return spring 52, a gear 53, a rotating shaft 54, a pull rope 55, a rack 56, a first piston 57, a second piston 58, and a limiting spring 59. One end of the limiting block 51 is slidably inserted into the positioning rod 32 along the sliding direction of the slider 31. The lower edge of the other end of the limiting block 51 is provided with a slope, and a limiting groove that mates with the other end of the limiting block 51 is opened on the inner wall of the lower pressure sleeve 41. The return spring 52 applies an outward elastic force to the limiting block 51. The rotating shaft 54 ​​is rotatably mounted on the positioning rod 32, and the gear 53 is coaxially fixed with the rotating shaft 54. One end of the pull rope 55 is connected to the rotating shaft... 54 is fixed, and the other end of the pull rope 55 is fixed to one end of the inner side of the limiting block 51 to pull the limiting block 51 to slide inward; the rack 56 is slidably mounted on the positioning rod 32 in the vertical direction, and the rack 56 and the gear 53 are meshed with each other; the positioning rod 32 has a first cavity 33 and a second cavity 34 that are interconnected; one end of the first piston 57 is slidably mounted in the first cavity 33 along the sliding direction of the slider 31, and the other end of the first piston 57 is fixed on the side of the positioning rod 32 away from the center of the centering assembly 3; the limiting spring 59 applies a spring force to the first piston 57 to slide away from the positioning rod 32; the second piston 58 is slidably mounted in the second cavity 34, and the second piston 58 is fixedly connected to the rack 56.

[0033] In specific implementation, the trigger component 5 is in an initial fixed state. The limiting block 51 extends outward under the elastic force of the return spring 52 and is inserted into the limiting groove on the inner wall of the lower pressure sleeve 41, so that the lower pressure sleeve 41 and the positioning rod 32 are reliably locked, preventing loosening and displacement during the sleeve feeding process and improving the stability of the feeding positioning. The positioning rod 32 is subjected to the radial support of the inner wall of the sleeve, causing the first piston 57 to slide in the first cavity 33 and compress the limiting spring 59. The medium in the first cavity 33 is pressurized and enters the second cavity 34, pushing the second piston 58 to move upward. The second piston 58 drives the rack 56 to slide vertically upward and mesh with the gear 53, driving the gear 53 and the rotating shaft 54 ​​to rotate synchronously. The rotating shaft 54 ​​winds up the pull rope 55, and the pull rope 55 pulls the limiting block 51 to slide inward against the elastic force of the return spring 52. When the positioning rod 32 slides to the limit position on the slider 31, the positioning rod 32 slides inward. When the sliding lock on block 31 stops, the limiting block 51 and the limiting groove on the inner wall of the lower pressure sleeve 41 are completely disengaged, releasing the limiting lock on the lower pressure sleeve 41. This achieves precise linkage of automatic unlocking and axial positioning after radial expansion and tightening, avoiding premature unlocking that could lead to positioning deviation. When the external force disappears, the limiting spring 59 pushes the first piston 57 to reset, and the medium backflow drives the second piston 58 and rack 56 to reset downwards. The gear 53 reverses to release the pull rope 55, and the limiting block 51 extends outwards and resets under the action of the reset spring 52, re-engaging into the limiting groove to restore the initial fixed state, completing the automatic reset and self-locking, which is convenient for the next cycle of material feeding and positioning. This triggering unit relies on pure mechanical linkage to achieve initial self-locking, precise unlocking in radial positioning, and reset self-locking. It does not require external electrical control or sensors and can be adapted to the positioning of sleeves with different inner diameters, significantly improving the versatility of the device and the welding positioning accuracy, and effectively improving production efficiency.

[0034] See Figures 1-4 In other embodiments, the drive assembly 6 includes: a lead screw 61, a nut seat 62, a connecting arm 63, and a motor 64; the lead screw 61 is vertically and rotatably mounted on the base 2; the nut seat 62 is threadedly connected to the lead screw 61; the connecting arm 63 is configured to correspond one-to-one with the slider 31, one end of the connecting arm 63 is hinged to the corresponding slider 31, and the other end of the connecting arm 63 is hinged to the nut seat 62; the motor 64 drives the lead screw 61 to rotate.

[0035] In practical implementation, motor 64 drives lead screw 61 to rotate around its own axis. Lead screw 61 drives nut seat 62 to move linearly along the axial direction through threaded transmission. Nut seat 62 synchronously drives multiple connecting arms 63 to move in linkage. Multiple connecting arms 63 convert axial movement into radial thrust, which drives multiple circumferentially distributed sliders 31 to slide outward synchronously and equidistantly along the radial direction of base 2, so that each positioning rod 32 uniformly tightens the inner wall of the sleeve, realizing automatic centering and radial adaptive positioning. The drive assembly 6 adopts a synchronous transmission structure of single motor 64, lead screw 61, nut seat 62 and multiple connecting arms 63. The power is concentrated and the transmission is smooth. It can ensure that all sliders 31 move synchronously and in the same direction, effectively avoiding sleeve eccentricity and uneven force. It can be adapted to sleeves with different inner diameters without replacing parts, improving the versatility and positioning accuracy of the device. At the same time, the structure is compact and the response is fast, improving welding and assembly efficiency.

[0036] Furthermore, both ends of the positioning rod 32 are provided with sliders 31, lead screws 61, nut seats 62, and connecting arms 63; and the two connecting arms 63 are coaxially fixed. Both ends of the positioning rod 32 are correspondingly provided with sliders 31, lead screws 61, nut seats 62, and connecting arms 63, and the connecting arms 63 at both ends are coaxially fixed, realizing synchronous linkage of the driving structures at both ends. The motor 64 drives the lead screw 61 at one end to rotate, and drives the corresponding nut seat 62 to slide axially through the threaded transmission. The nut seat 62 drives the coaxially fixed connecting arms 63 at both ends to rotate synchronously. The connecting arms 63 at both ends push their respective corresponding sliders 31 to slide outward synchronously and equidistantly along the radial direction of the base 2, thereby driving the positioning rod 32 to synchronously tighten the inner wall of the sleeve at both ends. This symmetrical driving structure at both ends can make the positioning rod 32 more evenly stressed and tighten more smoothly, effectively avoiding the positioning rod 32 from tilting or deforming due to unilateral stress, and further improving the centering accuracy and radial positioning stability of the sleeve.

[0037] See Figures 1-4 In other embodiments, the body clamping mechanism 7 includes a gripper 71 and a telescopic member 72. The gripper 71 is mounted on the frame 1 via the telescopic member 72, which extends and retracts in the direction of the sleeve positioning mechanism. Specifically, the telescopic member 72 drives the gripper 71 to extend and retract in the direction of the sleeve positioning mechanism. The gripper 71 first precisely clamps the control arm body on the vehicle suspension, ensuring a firm grip without loosening or shifting, thus guaranteeing subsequent docking accuracy. Then, the telescopic member 72 extends, pushing the gripper 71 to smoothly approach and precisely abut against the positioned sleeve, ensuring a tight fit and no gaps or misalignments at the connection between the control arm body and the sleeve, providing a stable docking reference for welding operations. Specifically, the telescopic member 72 can be a structure capable of linear movement, such as a cylinder, hydraulic cylinder, or electric push rod.

[0038] See Figures 1-4In other embodiments, a lifting assembly 73 and a laser rangefinder 74 are also included; the body clamping mechanism 7 is mounted on the frame 1 via the lifting assembly 73, and the laser rangefinder 74 is mounted on the base 2 to measure the sliding distance of the lower pressure sleeve 41 to adjust the height of the body clamping mechanism 7 on the lifting assembly 73 so that the control arm body on the body clamping mechanism 7 is aligned with the sleeve in the height direction.

[0039] In practice, the laser rangefinder 74 detects the sliding distance of the upper and lower pressure sleeves 41 of the base 2 in real time, accurately obtains the axial positioning height information of the sleeve, and feeds the detection data back to the lifting assembly 73. The lifting assembly 73 adaptively adjusts the installation height of the main body clamping mechanism 7 according to the actual sliding distance of the lower pressure sleeve 41, so that the control arm body clamped on the main body clamping mechanism 7 is automatically aligned with the sleeve in the height direction. This ensures that the coaxiality and height position of the control arm body and the sleeve are accurately matched when they are docked, avoiding height deviation, misalignment, or uneven gaps, and effectively improving the welding and assembly accuracy. Specifically, the lifting assembly 73 can be a structure capable of linear movement, such as a cylinder, hydraulic cylinder, or electric push rod.

[0040] See Figures 1-4 In another embodiment, the welding mechanism 8 includes a robotic arm 81 and a welding torch 82 mounted on the robotic arm 81. The robotic arm 81 can flexibly adjust its posture and position to drive the welding torch 82 mounted at its end to move precisely to the connection between the control arm body and the sleeve. With high-precision motion control, the robotic arm 81 can realize the uniform and smooth movement of the welding torch 82 along the connection, ensuring that the welding trajectory is regular and the weld is uniform and full.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A welding device for automobile suspension, characterized in that, include: frame; A sleeve positioning mechanism includes: a base, a centering assembly, an axial clamping assembly, a triggering assembly, and a driving assembly; the base is mounted on a frame; the centering assembly includes multiple circumferentially distributed positioning units, each positioning unit including a slider and a positioning rod; the slider is slidably mounted on the base along the radial direction of the centering assembly; the positioning rod is slidably mounted on the slider along the sliding direction of the slider, and the positioning rod is perpendicular to the base; the axial clamping assembly is slidably mounted on multiple positioning rods along the length direction of the positioning rods; the driving assembly drives multiple sliders to slide synchronously; after multiple positioning rods abut against the inner wall of the sleeve, and the positioning rod slides to its limit position on the slider, the triggering assembly triggers the axial clamping assembly to clamp the sleeve; The main body clamping mechanism clamps the control arm body on the vehicle suspension and controls the control arm body to abut against the positioned sleeve; and The welding mechanism welds the connection between the control arm body and the sleeve.

2. The automotive suspension welding device according to claim 1, characterized in that, The axial clamping assembly includes: a lower pressure sleeve, a transmission arm, a mounting base, and a tension spring; the lower pressure sleeve and the transmission arm are respectively arranged in a one-to-one correspondence with the positioning rod; the lower pressure sleeve is slidably sleeved on the positioning rod and one end of the transmission arm is hinged to the lower pressure sleeve; the lower end of the tension spring is fixed on the base, the upper end of the tension spring is fixed to the mounting base, and the other ends of the plurality of transmission arms away from the lower pressure sleeve are hinged to the mounting base; the triggering assembly controls the fixing and separation of the lower pressure sleeve and the positioning rod.

3. The automotive suspension welding device according to claim 2, characterized in that, The triggering assembly includes multiple triggering units corresponding one-to-one with the positioning rods. Each triggering unit includes: a limiting block, a return spring, a gear, a rotating shaft, a pull rope, a rack, a first piston, a second piston, and a limiting spring. One end of the limiting block is slidably inserted into the positioning rod along the sliding direction of the slider. The lower edge of the other end of the limiting block has a bevel, and a limiting groove that mates with the other end of the limiting block is formed on the inner wall of the lower pressure sleeve. The return spring applies an outward elastic force to the limiting block. The rotating shaft is rotatably mounted on the positioning rod, and the gear is coaxially fixed with the rotating shaft. One end of the pull rope is fixed to the rotating shaft, and the other end of the pull rope... One end is fixed to the inner side of the limiting block to pull the limiting block inward; the rack is slidably mounted on the positioning rod in the vertical direction, and the rack is meshed with the gear; the positioning rod has a first cavity and a second cavity that are interconnected; one end of the first piston is slidably mounted in the first cavity along the sliding direction of the slider, and the other end of the first piston is fixed on the side of the positioning rod away from the center of the centering assembly; the limiting spring applies a spring force to the first piston to slide away from the positioning rod; the second piston is slidably mounted in the second cavity, and the second piston is fixedly connected to the rack.

4. The automotive suspension welding device according to claim 1, characterized in that, The drive assembly includes: a lead screw, a nut seat, a connecting arm, and a motor; the lead screw is vertically and rotatably mounted on the base; the nut seat is threadedly connected to the lead screw; the connecting arm is configured to correspond one-to-one with the slider, one end of the connecting arm is hinged to the corresponding slider, and the other end of the connecting arm is hinged to the nut seat; the motor drives the lead screw to rotate.

5. The automotive suspension welding device according to claim 4, characterized in that, Both ends of the positioning rod are provided with sliders, lead screws, nut seats and connecting arms; and the two connecting arms are coaxially fixed.

6. The automotive suspension welding device according to claim 1, characterized in that, The main body clamping mechanism includes: a gripper and a telescopic member; the gripper is mounted on the frame via the telescopic member, which extends and retracts toward the sleeve positioning mechanism.

7. The automotive suspension welding device according to claim 2, characterized in that, It also includes a lifting assembly and a laser rangefinder; the main body clamping mechanism is mounted on the frame via the lifting assembly, and the laser rangefinder is mounted on the base to measure the sliding distance of the lower sleeve to adjust the height of the main body clamping mechanism on the lifting assembly, so that the control arm body on the main body clamping mechanism is aligned with the sleeve in the height direction.

8. The automotive suspension welding device according to claim 1, characterized in that, The welding mechanism includes a robotic arm and a welding torch mounted on the robotic arm.

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