Automobile undercoating lifting device

Abstract

The present application relates to the field of automobile primer, and particularly relates to a kind of automobile primer lifting appliance.The automobile primer lifting appliance includes lifting appliance framework, first lifting appliance assembly and second lifting appliance assembly are installed adjacently along transverse direction below the lifting appliance framework, the collinear production of pickup cab and pickup truck box can be realized by using two lifting appliance assemblies, the second lifting appliance assembly includes two groups of lifting arm block assembly arranged oppositely along longitudinal direction, each group of lifting arm block assembly is arranged in multiple lifting arm block assemblies in transverse direction, the second lifting appliance assembly supports pickup truck box through lifting arm block assembly, the second lifting appliance assembly switches between avoiding position and working position by opening and overturning two states, when producing car or SUV model, the second lifting appliance assembly is adjusted to avoiding position, at this time, car or SUV model can enter lifting appliance and be lifted by first lifting appliance assembly to carry out primer, the collinear production of pickup model and car or SUV model is realized.

Description

Technical Field

[0001] This invention relates to the field of automotive primer coating, and more specifically to an automotive primer coating hanger. Background Technology

[0002] Primer coating is a very important part of the production process in the painting workshop of an automobile factory. In the primer coating process, the car body needs to be lifted to a certain height and then the bottom of the car body is processed. Usually, primer lifting equipment is used as the carrier of the car body for operation.

[0003] Currently, mainstream automakers offer diversified products. Besides sedans and SUVs, pickup truck sales are showing a year-on-year upward trend, indicating strong market demand. When applying primer to sedans and SUVs, a primer hanger is typically used to support the bottom of the vehicle body, suspending it in the air for subsequent primer application. Sedan and SUV models can share a single carrier hanger for co-production. However, pickup trucks, with their separate cab and cargo bed structures, require separate support for each. The current method typically involves using a primer hanger to support the bottom of the pickup cab and using supports to hold the bottom skirt of the cargo bed, suspending the pickup truck in the air for subsequent primer application.

[0004] Currently, when applying primer to pickup trucks, many automakers produce the cab and cargo box on two separate carriers or on a single carrier. This production method results in a slow overall production cycle, low output, and is not conducive to automated production. Furthermore, primer carriers designed for pickup trucks are difficult to share with those used for sedans and SUVs, necessitating the construction of special production lines for pickup trucks, which significantly increases production costs. Summary of the Invention

[0005] The present invention provides an automotive undercoating hanger to solve the technical problems of existing automotive undercoating hangers being unable to achieve co-production of pickup trucks, sedans and SUVs, and having a slow production cycle.

[0006] To achieve the above objectives, the technical solution of the automotive undercoating lifting device of the present invention is as follows: It includes a lifting device frame, and below the lifting device frame is a first lifting device assembly capable of supporting a pickup truck cab, a sedan body, or an SUV body. The first lifting device assembly has at least two pairs of support legs arranged laterally, and each pair of support legs is arranged opposite each other longitudinally. Below the lifting device frame, a second lifting device assembly is arranged parallel to the first lifting device assembly. The second lifting device assembly includes two sets of boom support block assemblies arranged opposite each other longitudinally. Each set of boom support block assemblies includes at least two boom support block assemblies, and the at least two boom support block assemblies in the same set are arranged laterally at intervals. Each set of boom support block assemblies is flipped around a laterally extending axis. By flipping, the two sets of boom support block assemblies can be opened and overturned to allow the second lifting device assembly to switch between a clearance position for avoiding a pickup truck cab, a sedan body, or an SUV body and a working position for supporting a pickup truck bed.

[0007] Beneficial Effects: The above design features a first primer spreader supporting pickup truck cabs, sedan bodies, or SUV bodies, and a second spreader assembly supporting pickup truck beds, installed laterally adjacent to each other below the spreader frame. These two spreader assemblies enable co-line production of the pickup truck cab and cargo box, eliminating the need to produce them on separate spreaders during primer application. This improves production cycle time and efficiency, increasing output per unit time and thus saving costs and increasing company profits. Furthermore, the two sets of boom support blocks in the second spreader assembly can be opened and tilted, allowing for switching between clearance and working positions, ensuring the support of pickup trucks, sedan bodies, or SUV bodies. Co-production of vehicle bodies eliminates the need for separate production lines designed for pickup trucks, further improving production efficiency and saving costs. Furthermore, when primer coating is required for pickup trucks, the second primer coating hanger can switch between a clearance position and a working position, preventing interference between the second hanger assembly and the first hanger assembly supporting the pickup truck cab, thus improving the overall applicability of the hanger. Simultaneously, the flipping mechanism allows for switching between the clearance and working positions, utilizing the hanger's own space as its flipping operating area, improving overall space utilization. In summary, the automotive primer coating hanger of this invention solves the technical problems of existing automotive primer coating hangers being unable to achieve co-production of multiple vehicle models and having a slow production cycle.

[0008] Furthermore, the boom support block assembly is generally hook-shaped, and the hook-shaped openings of the two sets of boom support block assemblies are arranged opposite each other in the longitudinal direction. When moving from the avoidance position to the working position, the two sets of boom support block assemblies flip down from top to bottom and move closer to each other. The two sets of boom support block assemblies in the working position are used to support the pickup truck bed from the inside. When moving from the working position to the avoidance position, the two sets of boom support block assemblies flip up from bottom to top and move away from each other. A avoidance passage is formed between the two sets of boom support block assemblies to allow the pickup truck cab, car body or SUV body to pass.

[0009] Beneficial effects: Through the above design, in the working position, the boom support block assembly can support the pickup truck bed by supporting the inner folded edge of the pickup truck bed, thus avoiding supporting the softer side skirt and preventing the side skirt from deforming under stress during the support process, which would affect the overall vehicle weight. In the avoidance position, the two sets of boom support block assemblies can open away from each other to form an avoidance channel for pickup truck cabs, car bodies, or SUV bodies to enter the first lifting device assembly, avoiding interference with pickup truck cabs, car bodies, or SUV bodies. The overall structure is compact.

[0010] Furthermore, the second lifting device assembly includes a pair of support beams arranged opposite each other in the longitudinal direction. A rotating shaft is rotatably mounted on the support beams and the axis of the rotating shaft extends laterally. Each set of boom support block assemblies is anti-rotatingly engaged with the rotating shaft on its corresponding side. Thus, by rotating the two rotating shafts arranged opposite each other in the longitudinal direction, the boom support block assembly can be switched between the avoidance position and the working position.

[0011] Beneficial effects: Through the above design, each set of boom support block assemblies is anti-rotated and installed on a rotating shaft. The rotating shaft can directly drive the two sets of boom support block assemblies to switch between working positions and avoidance positions, making the boom support block assemblies more stable when switching working states.

[0012] Furthermore, one end of the boom support block assembly is anti-rotatingly mounted on the rotating shaft, and the other end extends toward another set of boom support block assemblies. The extended end is used to support the pickup truck bed. A boom support assembly is provided on the support beam between the extended end of the boom support block assembly and the end that is anti-rotatingly mounted on the rotating shaft. The boom support assembly is used to support the boom support block assembly in the working position.

[0013] Beneficial effects: The boom support assembly can support the boom support block assembly in the working position, preventing the pickup truck bed from falling off due to stress and causing production accidents. On the other hand, the boom support assembly is located between the cantilevered end of the boom support block assembly and the end that is fitted with the anti-rotation assembly of the rotating shaft. This reduces the lever arm when the boom support block assembly is in the working position and supporting the pickup truck bed, thereby reducing the torque and improving the stability of the support.

[0014] Furthermore, the center of gravity of the boom support block assembly in the avoidance position is located on the side of the rotating shaft opposite to the working position. A support is installed at one end of the boom support block assembly and the anti-rotation assembly of the rotating shaft. The support is used to abut against the boom support assembly when the boom support block assembly is in the avoidance position, so as to provide position support and position retention for the boom support block assembly in the avoidance position.

[0015] Beneficial effects: Through the above design, the support member can be used to support the boom block assembly in the avoidance position, and the support member abuts against the boom support assembly when in the avoidance position, which can further simplify the structure and make the overall structure more compact.

[0016] Furthermore, the second spreader assembly includes a damping component, which is used to increase the damping effect when the second spreader assembly changes between the working position and the avoidance position.

[0017] Beneficial effects: Through the above design, the damping component can increase the damping effect of the second spreader assembly during the transition between the working position and the avoidance position, ensuring the stability of the second spreader assembly when switching between the working position and the avoidance position. At the same time, when the second spreader assembly is in the working position and the avoidance position, the damping component can also maintain the state of the second spreader assembly, further improving the overall stability of the spreader.

[0018] Furthermore, the damping assembly includes a leaf spring fixedly mounted on the support beam and located in a vertical plane. A plane on the rotating shaft is adapted to the side of the leaf spring facing the rotating shaft. When the rotating shaft drives the boom support assembly to rotate to the clearance position and / or working position, the plane on the rotating shaft is in contact with the side of the leaf spring facing the rotating shaft and is located in a vertical plane.

[0019] Beneficial effects: Through the above design, by utilizing the elastic force of the leaf spring, the rotating shaft of the second lifting device assembly will be subjected to the elastic force of the leaf spring during the switching between the working position and the avoidance position, thereby providing a damping effect for the second lifting device assembly when switching states, improving the stability during state switching. At the same time, the damping effect is increased by utilizing the leaf spring and the plane of the rotating shaft that it is adapted to. The overall structure is simple and easy to operate.

[0020] Furthermore, the second spreader assembly includes a buffer assembly for providing cushioning when the boom block assembly switches from the clearance position to the working position.

[0021] Beneficial effects: Through the above design, the buffer component can absorb the impact and vibration generated when the second spreader component switches from the avoidance position to the working position, ensuring a smooth and low-noise switching process. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the overall structure of an embodiment 1 of the automotive undercoating hanger of the present invention;

[0023] Figure 2 This is a partial structural schematic diagram of the second lifting device assembly of an embodiment 1 of the present invention for an automotive undercoating lifting device;

[0024] Figure 3 This is a schematic diagram of the second lifting assembly of an embodiment 1 of the present invention, in the avoidance position and the working position;

[0025] Figure 4 This is a schematic diagram of the shock absorber assembly of an embodiment 1 of the automotive undercoating hanger of the present invention.

[0026] Figure 5 yes Figure 2 Enlarged view of point A in the middle.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Lifting glove frame; 2. First lifting glove assembly; 21. Intermediate connecting beam; 22. Upper connecting beam; 23. Lower connecting beam; 24. Support pin; 25. Fixed crossbeam; 26. Support pin mounting seat; 3. Second lifting glove assembly; 31. Rotating shaft assembly; 3101. Rotating shaft; 3102. Plane; 3103. Bearing with seat; 3104. Fixed seat; 3105. Fine-tuning bolt; 3106. Anti-rotation key block; 32. Boom support block assembly; 3201. Horizontal extension section; 3202. Vertical extension section; 3203. Support block connecting plate; 3204. Support block; 3205. Bushing; 3 206. Support plate; 3207. Reinforcing rib; 33. Push rod assembly; 3301. Push rod; 3302. Connecting sleeve; 34. Boom support assembly; 3401. Connecting plate; 3402. Support block; 3403. Rib plate; 3404. Vertical section; 35. Leaf spring assembly; 3501. Connecting section; 3502. Leaf spring mounting plate; 3503. Leaf spring; 3601. Support beam; 3602. Mounting plate; 37. Buffer assembly; 3701. Buffer assembly connecting plate; 3702. Spring mounting seat; 3703. Spring; 3704. Buffer block; 3705. Guide rod. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, and not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0031] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] The terms “up,” “down,” “front,” “back,” “left,” “right,” etc., indicate assumed orientations or positional relationships and are used only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0033] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0034] Specific embodiment 1 of the automotive undercoating hanger of the present invention: as follows Figure 1 As shown, the primer spreader includes a spreader frame 1. A first spreader assembly 2 and a second spreader assembly 3 are installed laterally adjacent to each other below the spreader frame 1. The first spreader assembly 2 is used to support the cab of a pickup truck, the body of a car, or the body of an SUV during primer application, and the second spreader assembly 3 is used to support the truck bed during primer application.

[0035] The first lifting device assembly 2 includes multiple pairs of support legs arranged laterally at intervals, each pair of support legs being arranged opposite each other longitudinally. Each support leg includes an upper connecting beam 22, a middle connecting beam 21, and a lower connecting beam 23. One end of the upper connecting beam 22 is fixed to the lifting device frame 1, and the other end extends outward longitudinally. The middle connecting beam 21 extends vertically up and down, with its upper end fixedly connected to the outward longitudinal end of the upper connecting beam 22 and its lower end fixedly connected to one end of the lower connecting beam 23. The other end of the lower connecting beam 23 extends longitudinally inward and a support pin mounting seat 26 is fixedly installed at that end. A support pin 24 extending vertically is fixedly installed on the upper surface of the support pin mounting seat 26. In this embodiment, the first lifting device assembly 2 includes three pairs of support legs. Two fixed crossbeams 25 are fixedly installed on the three support legs on the same side in the longitudinal direction, and each fixed crossbeam 25 is located between two adjacent support legs. The fixed crossbeams 25 can improve the stability between the support legs and prevent the first lifting device assembly 2 from shaking with each other during the support process, which could cause production failure.

[0036] Using three pairs of support legs, the first lifting assembly 2 can be used for lifting and supporting various vehicle types, such as existing pickup truck cabs, sedans, and SUVs, which can improve the overall applicability of the base coat lifting device. In other embodiments, the number of support legs of the first lifting assembly 2 can be adjusted as needed, such as 2 pairs, 4 pairs, 5 pairs, etc.

[0037] Preferably, such as Figure 1 , 2 As shown, the second lifting device assembly 3 includes a pair of support beams 3601 arranged longitudinally opposite each other. Mounting plates 3602 are installed at both ends of the support beams 3601. One end of the support beam is fixedly installed on the intermediate connecting beam 21 of one of the support legs of the adjacent first lifting device assembly 2 via the mounting plate 3602, and the other end is fixedly installed on the vertical beam of the lifting device frame 1 via the mounting plate 3602. This achieves the fixed installation of the support beams 3601 on the lifting device frame 1, and then the fixed installation of the second lifting device assembly 3 on the boom frame.

[0038] A rotating shaft assembly 31 is fixedly installed on the supporting crossbeam 3601. The rotating shaft assembly 31 includes a rotating shaft 3101, a seated bearing 3103, and a fixed seat 3104. A fixed seat 3104 is fixedly installed at each end of the supporting crossbeam 3601 and is fixedly installed on the upper side of the supporting crossbeam 3601. A seated bearing 3103 is fixedly installed on each fixed seat 3104 and the axes of the two seated bearings 3103 are arranged coaxially. The two ends of the rotating shaft 3101 are rotatably engaged with the two seated bearings 3103 respectively.

[0039] like Figure 5As shown, a pair of upwardly extending bosses are provided at the upper end of the fixed base 3104. The two bosses are arranged opposite each other along the longitudinal direction. Threaded through holes extending longitudinally are provided on the longitudinal side of the bosses. A fine-adjusting bolt 3105 is screwed into the threaded through hole. Screwing the fine-adjusting bolt 3105 inward can press the head of the bolt against the longitudinal side of the bearing 3103. By adjusting the fine-adjusting bolt 3105, the longitudinal position of the bearing 3103 can be finely adjusted and fixed, ensuring that the axes of the bearings 3103 at both ends of the supporting beam 3601 are always coaxially arranged, allowing the rotating shaft 3101 to rotate flexibly during rotation.

[0040] The second lifting device assembly 3 includes two sets of boom support block assemblies 32 arranged longitudinally opposite each other. Each set of boom support block assemblies 32 includes three boom support block assemblies 32 arranged laterally at intervals. Each boom support block assembly 32 includes a horizontal extension section 3201, a vertical extension section 3202, a support block connecting plate 3203, and a support block 3204.

[0041] In this embodiment, each group of boom support block assemblies 32 includes three boom support block assemblies 32 arranged laterally at intervals. It can lift various pickup truck bed models, including single-cab and double-cab pickup trucks, for subsequent base coating work. In other embodiments, the number of boom support block assemblies 32 in each group of boom support block assemblies 32 can be adjusted according to actual needs, such as 2, 5, 6, etc.

[0042] One end of the horizontal extension section 3201 is fixedly installed with a bushing 3205. The bushing 3205 is fixedly installed on the rotating shaft 3101 by an anti-rotation key block 3106, thereby realizing the anti-rotation cooperation between the boom support block assembly 32 and the rotating shaft 3101. The other end of the horizontal extension section 3201 extends inward along the longitudinal direction and is fixedly connected to the upper end of the vertical extension section 3202 at this end. The other end of the vertical extension section 3202 extends vertically downward and is fixedly connected to the support block connecting plate 3203 at its lower end. The other end of the support block connecting plate 3203 extends outward along the longitudinal direction and a support block 3204 is fixedly installed on its upper surface. That is, the support block 3204 is arranged below the horizontal extension section 3201.

[0043] Therefore, as Figure 2 As shown, the entire boom support block assembly 32 is hook-shaped, and the support block 3204 of the boom support block assembly 32 forms the hook tip. When moving from the avoidance position to the working position, the two sets of boom support block assemblies flip from top to bottom and move closer to each other between the two support beams. The two sets of boom support block assemblies in the working position are used to support the pickup truck bed from the inside. When moving from the working position to the avoidance position, the two sets of boom support block assemblies flip from bottom to top and move away from each other. A passage is formed between the two sets of boom support block assemblies to allow the pickup truck cab, car body or SUV body to pass.

[0044] like Figure 3 As shown, when lifting a pickup truck bed that requires primer, the second lifting assembly 3 can use the hook-shaped support block 3204 to insert into the gap of the inner fold of the pickup truck bed. This allows the inner fold of the harder material of the pickup truck bed to be supported when it is lifted, instead of using the support block 3204 or support pin 24 to support the softer bottom skirt of the pickup truck bed as in existing lifting methods. This avoids deformation of the bottom skirt due to stress, which would affect the overall vehicle weight. At the same time, inserting the support block 3204 into the gap of the inner fold also improves the stability of the boom support block assembly 32 in supporting the pickup truck bed.

[0045] In the vertical direction, the second lifting assembly 3 is positioned above the support position of the first lifting assembly 2 used to support the pickup truck cab, sedan body, or SUV body. That is, the height of the support block 3204 is higher than the height of the support pin 24. This arrangement ensures that when the pickup truck is lifted using the primer lifting tool, the height difference between the pickup truck cab lifted by the first lifting assembly 2 and the pickup truck bed lifted by the second lifting assembly 3 is consistent with the actual height difference between the pickup truck cab and the pickup truck bed during assembly. This allows the primer coating range of the pickup truck bed and pickup truck cab to be consistent with the required primer coating range of the assembled pickup truck cab and pickup truck bed. On the one hand, it avoids primer coating dead spots, further improving the primer coating effect; on the other hand, it avoids primer coating in unnecessary areas, saving costs.

[0046] like Figure 2 As shown, a push rod assembly 33 is fixedly installed on the rotating shaft 3101. The push rod assembly 33 includes a connecting sleeve 3302 that is mounted on the rotating shaft 3101 to prevent rotation and a push rod 3301 that is fixedly mounted on the circumferential surface of the connecting sleeve 3302.

[0047] By pushing the push rod 3301, the rotating shaft 3101 can be driven to rotate. In this embodiment, for example... Figure 3 As shown, when the push rod assembly 33 drives the rotating shaft 3101 to rotate and the two sets of boom support blocks assemblies 32 arranged longitudinally opposite each other approach each other, the second lifting device assembly 3 adjusts to the working position of the working state. When the push rod assembly 33 drives the rotating shaft 3101 to rotate and the two sets of boom support blocks assemblies 32 arranged longitudinally opposite each other move away from each other, the second lifting device assembly 3 adjusts to the open clearance position. One end of the push rod is connected to a thrust station (not shown in the figure), and the thrust station drives the rotating shaft to rotate by pushing the push rod.

[0048] Preferably, a boom support assembly 34 is fixedly installed on the support beam 3601, and a boom support assembly 34 is fixedly installed below each boom support block assembly 32 in the working position. The boom support assembly 34 includes a connecting plate 3401, a support block 3402, a stiffening plate 3403, and a vertical section 3404. One end of the connecting plate 3401 is fixedly installed on the support beam 3601, and a stiffening plate 3403 is welded between the connecting plate 3401 and the support beam 3601 to strengthen the support strength of the connecting plate 3401. The other end of the connecting plate 3401 extends longitudinally inward and is fixedly connected to the lower end of the vertical section 3404. The support block 3402 is fixedly installed on the upper end of the vertical section 3404, and the height of the upper end of the support block 3402 is the same as the height of the lower end face of the horizontal extension section 3201 of the boom support block assembly 32 in the working position.

[0049] With the above configuration, when the boom support block assembly 32 is in the working position, the boom support block assembly 32 can be supported on the support block 3402 through the horizontal extension section 3201. That is, the boom support assembly 34 can support the boom support block assembly 32 in the working position, and the support block 3402 of the boom support assembly 34 is located on the horizontal extension section 3201 of the boom support block assembly 32. By using the support block 3402 as a support point, the lever arm of the boom support block assembly 21 acting on the boom support block assembly 32 due to the weight of the pickup truck box can be reduced when lifting the pickup truck box. This reduces the torque generated by the weight of the pickup truck box acting on the boom support block assembly 32, thereby improving the stability of the boom support block assembly 32 when supporting the pickup truck box. At the same time, using the boom support assembly 34 to support the lower end of the boom support block assembly 32 can also improve the overall strength of the boom support block assembly 32, further improving the stability when lifting the pickup truck box.

[0050] In this embodiment, as Figure 3 As shown, the center of gravity of the boom support block assembly 32 in the avoidance position is located on the side of the support beam 3601 facing away from the working position. Preferably, the second lifting device assembly 3 includes a support member for maintaining and supporting the position of the boom support block assembly 32 in the avoidance position. In this embodiment, the support member is a support plate 3206, and the support plate 3206 is fixedly installed on the circumferential surface of the bushing 3205 facing away from the support block 3204. When the second lifting device assembly 3 is in the avoidance position, the support plate 3206 can abut against the side wall of the vertical section 3404 of the boom support assembly 34 facing the support plate 3206, thereby supporting the boom support block assembly 32. This arrangement, while providing support, makes the overall structure more compact and easier to operate.

[0051] A reinforcing rib 3207 is fixedly installed between the support plate 3206 and the bushing 3205 to strengthen the strength between them.

[0052] In this embodiment, the boom support assembly 34 is installed below the boom support block assembly 32. During installation, the position of the boom support block assembly 32 is first determined according to actual needs, and then the installation position of the boom support assembly 34 is determined. Finally, the boom support assembly 34 is fixed on the support beam 3601 according to the installation position to complete the fixed installation of the boom support assembly 34.

[0053] Preferably, a damping assembly is fixedly installed on the supporting beam 3601. In this embodiment, the damping assembly is a leaf spring assembly 35. The leaf spring assembly 35 includes a connecting section 3501, a leaf spring mounting plate 3502, and a pair of leaf springs 3503 in a vertical plane. The lower end of the connecting section 3501 is fixedly installed on the upper end surface of the supporting beam 3601, and the upper end of the connecting section 3501 is fixedly connected to the lower end surface of the leaf spring mounting plate 3502. The leaf spring mounting plate 3502 is located on both sides of the rotating shaft 3101 in the longitudinal direction. The two leaf springs 3503 are fixedly installed on the upper end surface of the leaf spring mounting plate 3502 and are arranged on both sides of the rotating shaft 3101 in the longitudinal direction. The distance between the two leaf springs 3503 in the longitudinal direction is less than the diameter of the rotating shaft 3101. Four planes 3102 adapted to the opposite surfaces of leaf springs 3503 are arranged circumferentially on the rotating shaft 3101. The four planes 3102 are arranged in pairs opposite each other. When the rotating shaft 3101 drives the boom support block assembly 32 to rotate to the working position, two of the opposite planes 3102 are respectively attached to the opposite surfaces of the two leaf springs 3503 and the planes are in the vertical plane. When the rotating shaft 3101 drives the boom support block assembly 32 to the clearance position, the other two opposite planes 3102 are respectively attached to the opposite surfaces of the two leaf springs 3503 and the planes attached to the leaf springs 3503 are in the vertical plane. With this arrangement, when the rotating shaft 3101 is in the working position or the clearance position, it is not subject to the elastic force of the leaf springs 3503 and can hinder the rotation of the rotating shaft 3101, thereby maintaining the position of the rotating shaft 3503.

[0054] Therefore, by utilizing the elastic force of the leaf spring 3503, during the switching between the working position and the avoidance position of the second lifting device assembly 3, the leaf spring 3503 is always in contact with the two planes 3102 of the rotating shaft 3101. On the one hand, it can always provide a damping effect when the second lifting device assembly 3 switches states, improving the stability during state switching. On the other hand, when in the working position or the avoidance position, the leaf spring 3503 can also provide a damping effect to maintain the position of the second lifting device assembly 3, improving the stability of the second lifting device assembly 3 in the working position or the avoidance position.

[0055] Preferred, such as Figure 3 , 4As shown, the second lifting device assembly 3 includes a buffer assembly 37, which includes a buffer assembly connecting plate 3701, a spring mounting seat 3702, a guide rod 3705, and a buffer block 3704. The spring mounting seat 3702 is cylindrical and has external threads on its outer circumference. One end of the buffer assembly connecting plate 3701 is fixedly installed on the side of the boom support assembly 34 facing the working position, and the other end extends longitudinally towards the working position and has a through hole in the vertical direction. Two nuts are screwed onto the outer circumference of the spring mounting seat 3702. The connecting piece is positioned between the two nuts in the vertical direction and is clamped onto the spring mounting seat 3702 by the two nuts.

[0056] An upwardly extending inner cavity is provided at the bottom of the spring mounting base 3702, the top of which is lower than the top of the spring mounting base 3702. A through hole is provided at the top of the spring mounting base 3702, penetrating the inner cavity, and the diameter of the inner cavity is larger than the diameter of the through hole. One end of the guide rod 3705 is an adapter section that fits into the through hole, and the other end is a large-diameter section that fits into the inner cavity. The adapter section of the guide rod 3705 extends out of the through hole from bottom to top and has external threads at the exit end. The spring 3703 is fitted onto the exit end of the guide rod 3705 through the through hole. The bottom surface of the buffer block 3704 has an upwardly extending threaded hole, and the buffer block 3704 is threadedly connected to the exit end of the guide rod 3705 through the threaded hole.

[0057] With this configuration, the buffer assembly 37 can absorb the impact and vibration generated when the second lifting device assembly 3 switches from the avoidance position to the open working position, ensuring a smooth and low-noise switching process. Since the buffer block 3704 is threaded onto the guide rod 3705 and the buffer assembly connecting plate 3701 is fixedly mounted on the spring mounting seat 3702 by two nuts, the position of the buffer block 3704 can be adjusted up and down, thereby adjusting the buffer size of the buffer assembly and adapting to boom support block assemblies 32 of different heights.

[0058] The working process of the automotive primer hanger of the present invention is as follows: When a sedan or SUV needs primer treatment, the thrust station is first started. The thrust station pushes the push rod 3301 and then rotates the shaft 3101, which drives the boom support block assembly 32 to rotate until the support plate 3206 abuts against the side wall of the vertical section 3404 of the boom support assembly 34 facing the support plate 3206. At this time, the second hanger assembly 3 is in the open clearance position, providing a channel for the sedan or SUV body to enter the primer hanger from the primer inlet. Then, the conveying system is used to transport the sedan or SUV body to the primer inlet of the primer hanger.

[0059] In the vertical direction, the car body or SUV body is located in the space between the bottom end of the lifting frame 1 and the top end of the support pin 24 of the first lifting assembly 2. The car body or SUV body is transported from the primer inlet to the first lifting assembly 2 using a conveying system until the bottom edge of the car body or SUV body is above at least two pairs of horizontally spaced support pins 24. Then, the height of the car body or SUV body is lowered so that the bottom edge of the car body or SUV body is supported on at least two pairs of horizontally spaced support pins 24, so that the car body or SUV body is reliably supported on the support pins 24 of the first lifting assembly 2. At this point, the lifting of the car body or SUV body is completed, and the subsequent primer coating process can be carried out.

[0060] When a pickup truck needs to be primed, the same steps as above are followed: the pusher station is used to push the push rod 3301 to rotate the rotating shaft 3101 until the second spreader assembly 3 is in the clearance position. Then, the pickup truck cab is transported to the primed entry point of the primed spreader using the conveying system. In the vertical direction, the pickup truck cab is located in the space between the bottom end of the spreader frame 1 and the top end of the support pin 24 of the first spreader assembly 2.

[0061] The pickup truck cab is transported from the primer spreader inlet to the first spreader assembly 2 using a conveying system until the end of the pickup truck cab facing the primer spreader inlet passes the end of the second spreader assembly 3 away from the primer spreader inlet. At this point, the pickup truck cab is completely detached from the second primer spreader in the lateral direction, and the bottom edge of the pickup truck cab is above at least two pairs of support pins 24 arranged laterally at intervals. Then, the height of the pickup truck cab is lowered until the bottom edge of the pickup truck cab is supported on at least two pairs of support pins 24 arranged laterally at intervals, so as to reliably support the pickup truck cab on the support pins 24 of the first spreader assembly 2. At this point, the lifting of the pickup truck cab is completed.

[0062] Then, the thrust station is used to drive the rotating shaft 3101 to rotate in the opposite direction. During the rotation of the rotating shaft 3101, the spring plate assembly 35 provides a damping effect for the rotation of the rotating shaft 3101. During the reverse rotation of the rotating shaft 3101, the horizontal extension section 3201 of the boom support block assembly 32 will improve stability and noise reduction under the buffering effect of the buffer assembly. When the lower end face of the boom support block assembly 32 abuts against the upper end face of the support block 3402 of the boom support assembly 34, the second lifting device assembly 3 is adjusted to the working position.

[0063] Furthermore, the pickup truck bed is transported to the primer inlet using a conveyor system. At this point, the folded edge of the pickup truck is vertically positioned between the top of the support block 3204 of the second lifting assembly 3 and the bottom surface of the horizontal extension 3201. During the transport process, the support block 3204 remains within the folded edge. When the folded edge is positioned on at least two support blocks 3204 spaced laterally, the height of the pickup truck bed is lowered until the folded edge is supported by the support blocks 3204, completing the lifting of the pickup truck bed. At this point, the height difference between the pickup truck cab and the pickup truck bed matches the actual height difference between the pickup truck cab and the pickup truck bed during vehicle assembly. This ensures that the primer coverage area of ​​the finished pickup truck bed and pickup truck cab matches the required primer coverage area for the assembled pickup truck cab and pickup truck bed, avoiding primer dead zones and further improving the primer effect.

[0064] This completes the hoisting of the entire pickup truck bed, allowing for subsequent primer application.

[0065] Embodiment 2 of the automotive undercoating lifting device of the present invention: The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the second lifting device assembly includes a pair of support beams arranged opposite each other along the longitudinal direction, and a rotating shaft with its axis extending laterally is rotatably mounted on the support beams. The rotating shaft on the corresponding side of each set of boom support block assemblies is anti-rotating, and the two sets of boom support block assemblies can be moved closer and further apart by rotating the rotating shaft. In this embodiment, the second lifting device assembly includes two sets of inverted L-shaped vertical beams arranged opposite each other along the longitudinal direction. The number and position of each set of inverted L-shaped vertical beams correspond to the number and position of the set of boom support block assemblies on the corresponding side. In a one-to-one correspondence, the upper ends of the two sets of vertical beams extend towards each other and are fixed to the spreader frame. One end of the horizontal extension of each boom support block assembly is hinged to the lower part of the vertical section of the corresponding "inverted L" shaped vertical beam. By rotating the boom support block assemblies in sequence, the second spreader assembly can be switched between the clearance position and the working position. Each boom support block assembly has a support plate at its lower end. One end of the support plate is fixedly installed on the "inverted L" shaped vertical beam. The support plate supports the boom support block assembly in the working position. The size of the support plate does not affect the entry of pickup truck cabs, car bodies, and SUV bodies into the first spreader assembly.

[0066] Embodiment 3 of the automotive undercoating hanger of the present invention: The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the support member is a support plate, while in this embodiment, the support member is a support block. The support block can increase the contact area between the entire support member and the side of the vertical section of the hanger support assembly when it is in the avoidance position, thereby improving the support effect.

[0067] Embodiment 4 of the automotive undercoating lifting device of the present invention: The difference between this embodiment and Embodiment 1 is that, in Embodiment 1, the boom support block assembly is hook-shaped as a whole. When moving from the clearance position to the working position, the two sets of boom support block assemblies flip from top to bottom and move closer to each other between the two supporting crossbeams. The two sets of boom support block assemblies in the working position are used to support the pickup truck bed from the inside. When moving from the working position to the clearance position, the two sets of boom support block assemblies flip from bottom to top and move away from each other, forming a clearance passage between the two sets of boom support block assemblies for passing through the pickup truck cab, sedan body, or SUV body. In this embodiment... The overall shape of the boom support block assembly is similar to that of the first lifting device assembly, that is, the support block is directly fixed to the upper end face of the horizontal extension section. At this time, the support block is used to support the side skirt of the pickup truck bed and thus lift the pickup truck bed. In order to avoid damage to the soft side skirt, a cushioning pad is installed on the support block. When moving from the clearance position to the working position, the boom support block assembly flips from bottom to top between the two support beams. When moving from the working position to the clearance position, the boom support block assembly flips from top to bottom and moves away from each other. When the boom support block assembly is in the working position, the rotating shaft can be locked on the seated bearing to maintain the working position.

[0068] Embodiment 5 of the automotive undercoating hanger of the present invention: The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the rotation of the boom support block assembly is achieved by using a rotating shaft. In this embodiment, the horizontal extension section of each boom support block assembly is directly and rotatably mounted on the support beam by a hinge. The boom support block assembly is switched between the clearance position and the working position by rotating the boom support block assembly in sequence.

[0069] Embodiment 6 of the automotive undercoating hanger of the present invention: The difference between this embodiment and Embodiment 1 is that in Embodiment 1, the damping component includes a leaf spring, and the damping effect provided by the leaf spring is achieved by using the leaf spring and a plane on the rotating shaft that is adapted to the leaf spring. In this embodiment, an elastic block facing the rotating shaft is provided on the supporting beam, and a cam surface is provided at the position of the elastic block on the rotating shaft. The damping effect on the rotating shaft is achieved by the cooperation between the cam surface and the elastic block.

[0070] Embodiment 7 of the automotive undercoating hanger of the present invention: The difference between this embodiment and Embodiment 1 is that in Embodiment 1, one end of the boom support block assembly is mounted on the rotating shaft by a bushing to prevent rotation, and the other end extends toward the working position. In this embodiment, a through hole is provided in the middle of the horizontal extension section of the boom support block assembly. The horizontal extension section is mounted on the rotating shaft by means of the through hole and fixed to the rotating shaft by welding. At this time, the end of the horizontal extension section facing away from the working position is exposed on the outside of the hanger frame. When the boom support block assembly is in the avoidance position, the exposed part of the horizontal extension section abuts against the boom support assembly, thereby realizing the maintenance of the avoidance position and the support of the boom support block assembly.

[0071] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A car undercoating lifting device, comprising a lifting device frame (1), and a first lifting device assembly (2) installed below the lifting device frame (1) for supporting a pickup truck cab, a sedan body, or an SUV body, wherein the first lifting device assembly (2) has at least two pairs of support legs spaced laterally, and each pair of support legs is arranged opposite to each other longitudinally, characterized in that, A second lifting assembly (3) is installed horizontally below the lifting frame (1) and arranged parallel to the first lifting assembly (2). The second lifting assembly (3) includes two sets of boom support blocks (32) arranged longitudinally opposite each other. Each set of boom support blocks (32) includes at least two boom support blocks (32), and the at least two boom support blocks (32) in the same set are spaced apart horizontally. Each set of boom support blocks (32) is flipped around a horizontally extending axis. The flipping enables the opening and overturning of the two sets of boom support blocks (32) so that the second lifting assembly (3) is in a clearance position for avoiding pickup truck cabs, car bodies, or SUV bodies and for... When switching between working positions supporting the pickup truck bed, the boom block assembly (32) is hook-shaped as a whole, and the hook-shaped openings of the two sets of boom block assemblies (32) are arranged opposite each other in the longitudinal direction. When moving from the avoidance position to the working position, the two sets of boom block assemblies (32) flip down from top to bottom and move closer to each other. The two sets of boom block assemblies (32) in the working position are used to support the inner fold of the pickup truck bed from the inside. When moving from the working position to the avoidance position, the two sets of boom block assemblies (32) flip up from bottom to top and move away from each other. A passage is formed between the two sets of boom block assemblies (32) to allow the pickup truck cab, car body or SUV body to pass.

2. The automotive undercoating lifting tool according to claim 1, characterized in that, The second lifting device assembly (3) includes a pair of support beams (3601) arranged opposite each other in the longitudinal direction. A rotating shaft (3101) is rotatably mounted on the support beams (3601) and the axis of the rotating shaft (3101) extends in the transverse direction. Each set of boom support block assembly (32) is anti-rotatingly engaged with the rotating shaft (3101) on its corresponding side. Thus, by rotating the two rotating shafts (3101) arranged opposite each other in the longitudinal direction, the boom support block assembly (32) can switch between the avoidance position and the working position.

3. The automotive undercoating lifting tool according to claim 2, characterized in that, One end of the boom support block assembly (32) is anti-rotationally mounted on the rotating shaft (3101), and the other end extends toward another set of boom support block assemblies (32). The extended end is used to support the pickup truck bed. A boom support assembly (34) is provided on the support beam (3601) between the extended end of the boom support block assembly (32) and the end anti-rotationally mounted on the rotating shaft (3101). The boom support assembly (34) is used to support the boom support block assembly (32) in the working position.

4. The automotive undercoating lifting tool according to claim 3, characterized in that, The center of gravity of the boom block assembly (32) in the avoidance position is located on the side of the rotating shaft (3101) away from the working position. A support is installed at one end of the boom block assembly (32) and the rotating shaft (3101) anti-rotation assembly. The support is used to abut against the boom support assembly (34) when the boom block assembly (32) is in the avoidance position, so as to provide position support and position retention for the boom block assembly (32) in the avoidance position.

5. The automotive undercoating lifting tool according to claim 3 or 4, characterized in that, The second spreader assembly (3) includes a damping component, which is used to increase the damping effect when the second spreader assembly (3) changes between the working position and the avoidance position.

6. The automotive undercoating lifting tool according to claim 5, characterized in that, The damping assembly includes a leaf spring (3503) fixedly installed on the support beam (3601) and located in the vertical plane (3102). The rotating shaft (3101) is provided with a plane (3102) that is adapted to the side of the leaf spring (3503) facing the rotating shaft (3101). When the rotating shaft (3101) drives the boom block assembly (32) to rotate to the clearance position and / or the working position, the plane (3102) on the rotating shaft (3101) is in contact with the side of the leaf spring (3503) facing the rotating shaft (3101) and is located in the vertical plane (3102).

7. The automotive undercoating lifting device according to any one of claims 1-4, characterized in that, The second spreader assembly (3) includes a buffer assembly (37) for providing cushioning when the boom block assembly (32) switches from the clearance position to the working position.

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