A lift structure for automotive painting

Abstract

The present invention relates to the technical field of automotive lifts, and discloses a lift structure for automotive painting, including: a column assembly, a lifting drive assembly is connected to the top of the column assembly, and a belt is connected to the output end of the lifting drive assembly; a lifting frame, the lifting frame is slidably arranged on the front side of the column assembly, the top of the lifting frame is connected to one end of the belt, and the lifting frame is used to support the vehicle body; a balance assembly, the balance assembly is connected to the bottom end of the lifting frame, and a movable counterweight wheel is arranged on the balance assembly, and the balance assembly is used to maintain the balance state of the lifting frame. The present invention effectively realizes the lifting operation of the vehicle body, and transports the vehicle body or automotive parts from one working area to another working area; a balance assembly is arranged on the lifting frame, and the center of gravity of the lifting frame is adjusted through the position-adjustable counterweight wheel, so that it always maintains a balanced state during the lifting process, maintains the stability of the vehicle body or automotive parts, and improves the safety performance of the lift structure.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive lifts, and more specifically, to a lift structure for automotive painting. Background Art

[0002] In an automotive painting production line, a belt lift is one of the very important devices. Its main function is to transport automotive parts from one working area to another, and it can also realize the up and down movement of the parts. The motor converts the rotational movement into the rotational movement of the drum through components such as a reducer, a coupling, and a chain drive device, and drives the lifting frame to move up and down through the action of transmission parts such as a belt, realizing the up and down transportation function of the lift.

[0003] In the prior art, for example, the utility model patent with the application number CN202222028240.5 discloses a lift for an automotive interior painting line, including a base; there are two groups of the bases, and movable components are arranged on the tops of both bases. A fixing unit is arranged on the side wall of the movable component, and the fixing unit is fixedly connected to the top of the base through the movable component. The movable component includes a fixing plate, and grooves are formed in the inner wall of the fixing plate. There are several grooves, and the grooves are symmetrically formed on the side wall of the fixing plate. A fixing seat is arranged on the top of the fixing plate. There are two groups of the fixing seats, and the bottoms of both fixing seats are fixedly connected to the top of the fixing plate. Counterweights and limit blocks are arranged at both ends of the chain. This device avoids deviation of the movable plate during movement and improves the movement stability through the setting of counterweights; however, in actual use, due to factors such as the weight of the load and the placement position, the center of gravity deviation of the movable plate is more significant, easily leading to an unbalanced state of the movable plate and potential safety hazards such as tipping.

[0004] Therefore, it is necessary to propose a lift structure for automotive painting to at least partially solve the problems existing in the prior art. Summary of the Invention

[0005] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further elaborated in the Detailed Description section. The Summary of the Invention section of the present invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0006] To at least partially solve the above problems, the present invention provides a lift structure for automotive painting, including:

[0007] A column assembly, with a lifting drive assembly connected to the top of the column assembly, and a belt connected to the output end of the lifting drive assembly;

[0008] The lifting frame is slidably arranged on the front side of the column assembly. The top end of the lifting frame is connected to one end of the belt, and the lifting frame is used to support the vehicle body.

[0009] The balance assembly is connected to the bottom end of the lifting frame. A movable counterweight wheel is arranged on the balance assembly, and the balance assembly is used to maintain the balance state of the lifting frame.

[0010] Preferably, the lifting and lowering drive assembly includes a drive motor, a roller, a belt connecting frame, and a counterweight frame. The drive motor is connected to the top end of the column assembly. The output ends of the two drive motors are simultaneously connected to the central roller. The belt connecting frame is connected to the top end of the lifting frame. The counterweight frame is slidably connected to the rear side of the column assembly. The belt is arranged in a double layer. The top of the belt surrounds the roller. One end of the belt located on the front side of the column assembly is connected to the belt connecting frame, and one end of the belt located on the rear side of the column assembly is connected to the counterweight frame. A plurality of counterweight blocks are connected to the counterweight frame.

[0011] Preferably, a maintenance and transfer frame is connected to the rear side of the column assembly, which is used to transfer the elevator to the maintenance workshop for repair and maintenance.

[0012] Preferably, the lifting frame is arranged in a bent structure, including a horizontal part of the lifting frame and a vertical part of the lifting frame. The vertical part of the lifting frame is slidably connected to the front side of the column assembly. The horizontal part of the lifting frame is connected to the bottom end of the vertical part of the lifting frame. A semi-closed belt-type roller bed is connected above the horizontal part of the lifting frame, and the semi-closed belt-type roller bed is used to convey and clamp the vehicle body.

[0013] Preferably, the balance assembly is connected to the rear side of the vertical part of the lifting frame. The balance assembly includes:

[0014] A balance box, which is connected to the bottom end of the rear side of the vertical part of the lifting frame;

[0015] A counterweight wheel slide rail, which is connected to the bottom end of the balance box and is arranged in an arc shape;

[0016] A counterweight wheel, which is slidably connected to the counterweight wheel slide rail and is used to adjust the balance state of the lifting frame.

[0017] Preferably, the balance assembly further includes: a balance pressure plate, which is connected to both sides of the balance box through an elastic telescopic rod. The balance pressure plate is slidably connected to the inner wall of the vertical rod of the column assembly. A pressure sensor is connected to the balance pressure plate, which is used to detect the pressure exerted by the balance pressure plate on the vertical rod.

[0018] Preferably, the balance assembly further includes a first leveling unit. The first leveling unit includes:

[0019] A gear disk, which is rotatably connected to the center of the inner wall of the balance box. The rotating shaft of the gear disk is connected to the output end of the motor, and the motor is installed on the side wall of the balance box;

[0020] Driven gears, two driven gears are rotatably connected to the inner wall of the balance box and meshingly connected to both sides of the toothed disc. A wire reel is coaxially connected to the rotating shaft of the driven gear;

[0021] Guide wheel, the guide wheel is rotatably connected to the balance box and arranged close to the side wall of the balance box;

[0022] Balance rope, one end of the balance rope is wound around the wire reel on one side. After the balance rope sequentially surrounds the guide wheel on one side, the counterweight wheel, and the guide wheel on the other side, it is wound around the wire reel on the other side.

[0023] Preferably, the balance assembly further includes a second leveling unit, and the second leveling unit includes:

[0024] Adjusting rod, the adjusting rod is eccentrically connected to the toothed disc. When in the balanced position, the adjusting rod is vertically arranged at the center of the toothed disc;

[0025] Sliding sleeve, the sliding sleeve is hinged to the center of the inner wall of the balance box and located below the toothed disc. The lower part of the adjusting rod is slidably arranged in the sliding sleeve;

[0026] Counterweight ball, the counterweight ball is connected to the bottom end of the adjusting rod.

[0027] Preferably, a descent control unit is provided on the balance box, and the descent control unit includes:

[0028] Support frames, two support frames are symmetrically connected to the bottom end of the balance box and are arranged obliquely;

[0029] Descent control brackets, the bottom ends of two descent control brackets are hinged to the support frames;

[0030] Descent control plate, the descent control plate is connected to the inner side of the vertical rod of the column assembly. A vertical chute is provided on the descent control plate, and the width of the vertical chute is greater than the width when the descent control brackets are retracted and less than the width when the descent control brackets are deployed. On the part of the descent control plate on both sides of the vertical chute, descent control toothed plates are provided, and the descent control brackets are in contact with the descent control toothed plates when deployed.

[0031] Preferably, the descent control unit further includes:

[0032] Guide sliding sleeve, the guide sliding sleeve is connected to both sides of the balance box;

[0033] First connecting rod, the first connecting rod is slidably connected in the guide sliding sleeve and is vertically arranged;

[0034] Second connecting rods, two second connecting rods are hinged to the bottom end of the first connecting rod, and the bottom ends of the two second connecting rods are respectively hinged to the middle parts of the two descent control brackets;

[0035] Third connecting rod, both ends of the third connecting rod are respectively hinged to the top end of the first connecting rod and the inner side of the balance pressing plate.

[0036] Preferably, a safety protection unit is provided on the balance box, and the safety protection unit includes:

[0037] Arc-shaped buffer plate, which is arranged below the balance box, and the height of the arc-shaped buffer plate is lower than that of the support frame;

[0038] Elastic members, and a plurality of elastic members are evenly connected between the arc-shaped buffer plate and the balance box.

[0039] Preferably, the safety protection unit further includes:

[0040] Protective airbag, which is connected between the arc-shaped buffer plate and the balance box;

[0041] Safety box, which is connected to the bottom end of the balance box and is located above the arc-shaped buffer plate;

[0042] Safety slider, the safety slider includes a conical section at the lower part and a vertical section at the upper part. Limiting block grooves are arranged on both sides of the vertical section of the safety slider, and limiting blocks are connected in the limiting block grooves through springs. A conical groove adapted to the conical section is arranged at the bottom of the safety box, a sliding groove for the safety slider to slide is opened at the center of the safety box, and limiting holes are arranged on both sides of the sliding groove;

[0043] Transmission grooves, which are symmetrically opened in the safety box and are located on both sides of the conical groove;

[0044] First transmission rod, the first transmission rod is slidably connected in the horizontal section of the transmission groove, a spring is connected between the first transmission rod and the end of the transmission groove, and one end of the first transmission rod extends into the conical groove to slide relatively with the conical section of the safety slider;

[0045] Second transmission rod, the second transmission rod includes an upper rod section, a connecting column and a lower rod section connected in sequence from top to bottom. A wedge-shaped surface is arranged at the bottom end of the lower rod section, and the wedge-shaped surface of the lower rod section slides relatively with the end of the first transmission rod. The second transmission rod is slidably arranged in the vertical section of the transmission groove. A first position sensor and a second position sensor are arranged on the transmission groove from bottom to top in sequence. The first position sensor is located at the connecting column, the second position sensor is located above the upper rod section, and the distance between the first position sensor and the end of the lower rod section is less than the distance between the second position sensor and the end of the upper rod section;

[0046] Inflatable tube, which is connected to the top end of the safety box and is used to inflate the protective airbag.

[0047] Compared with the prior art, the present invention has at least the following beneficial effects:

[0048] A lift structure for automobile painting provided by the present invention effectively realizes the lifting operation of the vehicle body, and transports the vehicle body or automobile parts from one working area to another. A balance component is arranged on the lifting frame, and the center of gravity of the lifting frame is adjusted through a counterweight wheel with adjustable position, so that it always maintains a balanced state during the lifting process, keeps the stability of the vehicle body or automobile parts, and improves the safety performance of the lift structure.

[0049] A lift structure for automobile painting according to the present invention. Other advantages, objectives and features of the present invention will be partially reflected by the following description, and will also be understood by those skilled in the art through the research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention. In the drawings:

[0051] Figure 1 is a schematic structural diagram of the present invention;

[0052] Figure 2 is a schematic structural diagram of the lifting frame in the present invention;

[0053] Figure 3 is a schematic structural diagram of the drive motor in the present invention;

[0054] Figure 4 is a schematic structural diagram of the belt connecting frame in the present invention;

[0055] Figure 5 is a schematic structural diagram of the balance box in the present invention (when the slow descent bracket is retracted);

[0056] Figure 6 is a schematic structural diagram of the balance box in the present invention (when the slow descent bracket is deployed);

[0057] Figure 7 is the present invention Figure 5 is a partial enlarged structural diagram of part A in the present invention;

[0058] Figure 8 is the present invention Figure 5 is a partial enlarged structural diagram of part B in the present invention;

[0059] Figure 9 is a schematic installation structure diagram of the slow descent plate in the present invention;

[0060] Figure 10 is a schematic sectional structure diagram of the safety box in the present invention;

[0061] Figure 11 is a schematic sectional structure diagram of the safety slider in the present invention;

[0062] Figure 12 This is a schematic structural view of the second transmission rod in the present invention.

[0063] In the figure: 1. Column assembly; 2. Lifting drive assembly; 3. Belt; 4. Lifting frame; 5. Maintenance transfer frame; 21. Drive motor; 22. Drum; 23. Belt connection frame; 24. Counterweight frame; 41. Horizontal part of the lifting frame; 42. Vertical part of the lifting frame; 51. Balance box; 52. Counterweight wheel slide rail; 53. Counterweight wheel; 54. Balance pressure plate; 55. Elastic telescopic rod; 56. Tooth disc; 57. Driven gear; 58. Thread wheel; 59. Guide wheel; 61. Balance rope; 62. Adjusting rod; 63. Sliding sleeve; 64. Counterweight ball; 65. Support frame; 66. Descent control bracket; 67. Descent control plate; 68. Vertical chute; 69. Descent control tooth plate; 71. Guide sliding sleeve; 72. First connecting rod; 73. Second connecting rod; 74. Third connecting rod; 81. Arc buffer plate; 82. Elastic member; 83. Protection airbag; 84. Safety box; 85. Safety slider; 86. Limit block groove; 87. Limit block; 88. Conical groove; 89. Chute; 90. Inflatable tube; 91. Limit hole; 92. Transmission groove; 93. First transmission rod; 94. Second transmission rod; 95. Upper rod section; 96. Connection column; 97. Lower rod section; 98. First position sensor; 99. Second position sensor. Detailed implementation manners

[0064] The following further elaborates on the present invention in conjunction with the accompanying drawings and embodiments, enabling those skilled in the art to implement it with reference to the description in the specification.

[0065] It should be understood that terms such as "having", "including", and "comprising" as used herein do not exclude the presence or addition of one or more other elements or their combinations.

[0066] Embodiment 1:

[0067] As Figures 1-4 shown, the present invention provides a lift structure for automobile painting, including:

[0068] Column assembly 1, the top of the column assembly 1 is connected with a lifting drive assembly 2, and the output end of the lifting drive assembly 2 is connected with a belt 3;

[0069] Lifting frame 4, the lifting frame 4 is slidably arranged on the front side of the column assembly 1, the top of the lifting frame 4 is connected with one end of the belt 3, and the lifting frame 4 is used to support the vehicle body;

[0070] Balance assembly, the balance assembly is connected to the bottom end of the lifting frame 4, and a movable counterweight wheel 53 is arranged on the balance assembly, and the balance assembly is used to maintain the balance state of the lifting frame 4.

[0071] The working principle and beneficial effects of the above technical solution are as follows:

[0072] A lift structure for automobile painting. When in use, the body structure to be lifted is clamped on the lifting frame 4, and the lifting drive assembly 2 is started to wind the drive belt 3. As the length of the belt 3 above the lifting frame 4 shortens, the lifting frame 4 is pulled upward to achieve the lifting of the body structure; a balance assembly is provided at the bottom end of the lifting frame 4. When the body is in a left-right imbalance state during the lifting process, the position of the counterweight wheel 53 on the balance assembly is adjusted to make the center of gravity of the lifting frame 4 move closer to the center of the column assembly 1 again, restoring the balance state of the lifting frame 4 and maintaining the stability of the body.

[0073] Through the above structural design, a lift structure for automobile painting is provided, which effectively realizes the lifting operation of the body, transporting the body or automobile parts from one working area to another; a balance assembly is provided on the lifting frame 4, and the center of gravity of the lifting frame 4 is adjusted by the position-adjustable counterweight wheel 53, so that it always maintains a balanced state during the lifting process, maintaining the stability of the body or automobile parts and improving the safety performance of the lift structure.

[0074] Embodiment 2:

[0075] As Figures 1-4 shown, on the basis of the above Embodiment 1, the lifting drive assembly 2 includes a drive motor 21, a drum 22, a belt connecting frame 23 and a counterweight frame 24. The drive motor 21 is connected to the top end of the column assembly 1, the output ends of the two drive motors 21 are simultaneously connected to the central drum 22, the belt connecting frame 23 is connected to the top end of the lifting frame 4, the counterweight frame 24 is slidably connected to the rear side of the column assembly 1, the belt 3 is arranged in a double layer, the top of the belt 3 surrounds the drum 22, one end of the belt 3 in front of the column assembly 1 is connected to the belt connecting frame 23, one end of the belt 3 behind the column assembly 1 is connected to the counterweight frame 24, and a plurality of counterweight blocks are connected to the counterweight frame 24.

[0076] The working principle and beneficial effects of the above technical solution are as follows:

[0077] When the lifting drive assembly 2 is in use, start the drive motors 21 on both sides to rotate forward synchronously, drive the roller 22 in the center to rotate forward. When the roller 22 rotates, it winds up the belt 3 on the front side of the column assembly 1. The belt 3 pulls the lifting frame 4 upward through the belt pulley connecting frame 23 to achieve the lifting of the vehicle body. Start the drive motors 21 on both sides to rotate reversely synchronously, drive the roller 22 to rotate reversely. When the roller 22 rotates, it releases the belt 3 on the front side of the column assembly 1, and the lifting frame 4 moves downward under the action of gravity to achieve the lowering of the vehicle body. Connect a counterweight frame 24 to one end of the belt 3 located at the rear side of the column assembly 1. Under the action of the counterweight, the weights of the vehicle body and the lifting frame 4 are balanced, ensuring balanced force during the lifting process and improving the stability of the vehicle body during the lifting and lowering process. The double-layer belt drive method is adopted, which has a high load-bearing capacity and transportation efficiency.

[0078] Wherein, a maintenance transfer frame 5 is connected to the rear side of the column assembly 1, which is used to transfer the lift to the maintenance workshop for maintenance and upkeep.

[0079] The lifting frame 4 is set as a bent structure, including a horizontal part 41 of the lifting frame and a vertical part 42 of the lifting frame. The vertical part 42 of the lifting frame is slidably connected to the front side of the column assembly 1. The horizontal part 41 of the lifting frame is connected to the bottom end of the vertical part 42 of the lifting frame. A semi-closed belt type roller bed 6 is connected above the horizontal part 41 of the lifting frame. The semi-closed belt type roller bed 6 is used to convey and clamp the vehicle body or automotive parts, and transfer the vehicle body or automotive parts from the previous station to the horizontal part 41 of the lifting frame.

[0080] Embodiment 3:

[0081] As Figure 5 、 6 shown, on the basis of the above Embodiment 2, the balance assembly is connected to the rear side of the vertical part 42 of the lifting frame. The balance assembly includes:

[0082] A balance box 51, which is connected to the bottom end of the rear side of the vertical part 42 of the lifting frame;

[0083] A counterweight wheel slide rail 52, which is connected to the bottom end of the balance box 51, and the counterweight wheel slide rail 52 is arranged in an arc shape;

[0084] A counterweight wheel 53, which is slidably connected to the counterweight wheel slide rail 52 and is used to adjust the balance state of the lifting frame 4.

[0085] The working principle and beneficial effects of the above technical solutions are:

[0086] When the balance component is in use, when the lifting frame 4 tilts to the left, that is, the center of gravity of the lifting frame 4 shifts to the left, the position of the counterweight wheel 53 is adjusted so that it moves to the right along the counterweight wheel slide rail 52, increasing the weight on the right side of the lifting frame 4 and making its center of gravity return to the central position again; when the lifting frame 4 tilts to the right, that is, the center of gravity of the lifting frame 4 shifts to the right, the position of the counterweight wheel 53 is adjusted so that it moves to the left along the counterweight wheel slide rail 52, increasing the weight on the left side of the lifting frame 4 and making its center of gravity return to the central position again, thereby realizing the balance adjustment of the lifting frame 4.

[0087] Embodiment 4:

[0088] As Figure 5 、 6 shown, on the basis of the above Embodiment 3, the balance component further includes: a balance pressing plate 54, the balance pressing plate 54 is connected to both sides of the balance box 51 through an elastic telescopic rod 55, the balance pressing plate 54 is slidably connected to the inner wall of the vertical rod 11 of the column assembly 1, and a pressure sensor is connected to the balance pressing plate 54 for detecting the pressure exerted by the balance pressing plate 54 on the vertical rod 11.

[0089] The working principle and beneficial effects of the above technical solution are as follows:

[0090] Balance pressing plates 54 are arranged on both sides of the balance box 51, and the balance pressing plates 54 slide relative to the vertical rod 11 of the column assembly 1. Through the arrangement of the elastic telescopic rod 55, under the elastic action, the balance pressing plates 51 on both sides are pressed tightly against the vertical rod 11, which helps to maintain the neutral position of the balance box 51 and the lifting frame 4; the extrusion force of the vertical rod 11 on the balance pressing plate 54 is detected by the pressure sensor on the balance pressing plate 54. When the difference between the extrusion forces on both sides is within the preset range, it indicates that the lifting frame 4 is in a balanced state; when the difference between the extrusion forces on both sides exceeds the preset range, it indicates that the lifting frame 4 tilts to the side with a larger pressure value, and the lifting frame 4 has a tendency to lose balance.

[0091] Embodiment 5:

[0092] As Figures 5-7 shown, on the basis of the above Embodiment 4, the balance component further includes a first leveling unit, and the first leveling unit includes:

[0093] A toothed disk 56, the toothed disk 56 is rotatably connected to the center of the inner wall of the balance box 51, the rotating shaft of the toothed disk 56 is connected to the output end of the motor, and the motor is installed on the side wall of the balance box 51;

[0094] Driven gears 57, two driven gears 57 are rotatably connected to the inner wall of the balance box 51 and are meshed with both sides of the toothed disk 56, and a wire wheel 58 is coaxially connected to the rotating shaft of the driven gear 57;

[0095] A guide wheel 59, the guide wheel 59 is rotatably connected to the balance box 51 and is arranged close to the side wall of the balance box 51;

[0096] The balance rope 61 has one end wound around the wire wheel 58 on one side. After the balance rope 61 successively surrounds the guide wheel 59 on one side, the counterweight wheel 53, and the guide wheel 59 on the other side, it is wound around the wire wheel 58 on the other side. The balance rope 61 is relatively fixed to the counterweight wheel 53.

[0097] The working principle and beneficial effects of the above technical solution are as follows:

[0098] When the first leveling unit is in use, when the lifting frame 4 has a tendency to tilt to the right, the motor is started to drive the gear disk 56 to rotate clockwise. The gear disk 56 meshes with the two driven gears 57 for transmission, driving the two transmission gears 57 to rotate counterclockwise. The transmission gears 57 drive the wire wheels 58 to rotate synchronously. When the left wire wheel 58 rotates counterclockwise, the balance rope 61 is wound around the left wire wheel 58. When the right wire wheel 58 rotates counterclockwise, the balance rope 61 on the right wire wheel 58 is relaxed. Then, under the traction of the balance rope 61, the counterweight wheel 53 slides to the left along the counterweight wheel slide rail 52, moving the center of gravity of the balance box 51 to the left, and adjusting the lifting frame 4 from the state of tilting to the right to the balanced state.

[0099] When the lifting frame 4 has a tendency to tilt to the left, the motor is started to drive the gear disk 56 to rotate counterclockwise. The gear disk 56 meshes with the two driven gears 57 for transmission, driving the two transmission gears 57 to rotate clockwise. The transmission gears 57 drive the wire wheels 58 to rotate synchronously. When the left wire wheel 58 rotates clockwise, the balance rope 61 on the left wire wheel 58 is relaxed. When the right wire wheel 58 rotates clockwise, the balance rope 61 is wound around the right wire wheel 58. Then, under the traction of the balance rope 61, the counterweight wheel 53 slides to the right along the counterweight wheel slide rail 52, moving the center of gravity of the balance box 51 to the right, and adjusting the lifting frame 4 from the state of tilting to the left to the balanced state.

[0100] Through the above structural design, according to the pressure data collected by the pressure sensor, the tilting trend of the lifting frame 4 is evaluated, the rotation direction of the starting motor is adapted, the counterweight wheel 53 is moved in the direction opposite to the tilting trend, and then the center of gravity of the lifting frame 4 moves towards the center, readjusting the tilting state of the lifting frame 4 to the balanced state. By simultaneously pulling and relaxing the balance ropes 61 on both sides, the stability of the movement of the counterweight wheel 53 is maintained, and the accuracy of the center of gravity adjustment is improved.

[0101] Embodiment 6:

[0102] As Figures 5-8 shown, on the basis of the above Embodiment 5, the balance assembly further includes a second leveling unit. The second leveling unit includes:

[0103] The adjusting rod 62 is eccentrically connected to the gear disk 56. When in the balanced position, the adjusting rod 62 is vertically arranged at the center of the gear disk 56;

[0104] The sliding sleeve 63 is hinged to the center of the inner wall of the balance box 51 and is located below the gear disk 56. The lower part of the adjusting rod 62 is slidably arranged in the sliding sleeve 63;

[0105] The counterweight ball 64 is connected to the bottom end of the adjusting rod 62.

[0106] The working principle and beneficial effects of the above technical solution are as follows:

[0107] When the second leveling unit is in use, when the lifting frame 4 has a tendency to tilt to the right, the motor is started to drive the gear disk 56 to rotate clockwise. The gear disk 56 drives the upper part of the adjusting rod 62 to rotate to the right. The lower part of the adjusting rod 62 slides along the sliding sleeve 63 and rotates to the left, driving the counterweight ball 64 to move towards the lower left direction, so that the center of gravity of the lifting frame 4 moves towards the lower left direction; when the lifting frame 4 has a tendency to tilt to the left, the motor is started to drive the gear disk 56 to rotate counterclockwise. The gear disk 56 drives the upper part of the adjusting rod 62 to rotate to the left. The lower part of the adjusting rod 62 slides along the sliding sleeve 63 and rotates to the right, driving the counterweight ball 64 to move towards the lower left direction, so that the center of gravity of the lifting frame 4 moves towards the lower right direction.

[0108] Through the setting of the second leveling unit, the range of center adjustment can be further improved. At the same time, when the counterweight wheel 53 moves along the arc-shaped counterweight wheel slide rail 52, the problem of the center of gravity moving upward can be solved. While effectively realizing the left and right center of gravity adjustment, the problem of the center deviation in the vertical direction is reduced, and the balance adjustment effect is improved.

[0109] Embodiment 7:

[0110] As shown in Figure 5 、 6 、9, on the basis of the above Embodiment 2, a descending speed control unit is arranged on the balance box 51. The descending speed control unit includes:

[0111] The support frames 65, two support frames 65 are symmetrically connected to the bottom end of the balance box 51 and are arranged obliquely;

[0112] The descending speed control brackets 66, the bottom ends of two descending speed control brackets 66 are hinged to the support frames 65;

[0113] The descending speed control plate 67 is connected to the inner side of the vertical rod 11 of the column assembly 1. A vertical chute 68 is formed on the descending speed control plate 67. The width of the vertical chute 68 is greater than the width of the descending speed control bracket 66 when it is folded and less than the width of the descending speed control bracket 66 when it is unfolded. On the part of the descending speed control plate 67 on both sides of the vertical chute 68, descending speed control tooth plates 69 are arranged, and the descending speed control bracket 66 contacts the descending speed control tooth plates 69 when it is unfolded;

[0114] The guiding sliding sleeves 71 are connected to both sides of the balance box 51;

[0115] The first connecting rod 72 is slidably connected within the guiding sliding sleeve 71 and is vertically arranged.

[0116] The second connecting rods 73, two second connecting rods 73 are hinged to the bottom end of the first connecting rod 72, and the bottom ends of the two second connecting rods 73 are respectively hinged to the middle parts of the two buffer lowering brackets 66.

[0117] The third connecting rod 74, both ends of the third connecting rod 74 are respectively hinged to the top end of the first connecting rod 72 and the inner side of the balance pressing plate 54.

[0118] The working principle and beneficial effects of the above technical solution are as follows:

[0119] When the buffer lowering unit is in use, when the buffer lowering brackets 66 are not unfolded, they can move in front of the vertical sliding groove 68 of the buffer lowering plate 67 and do not come into contact with the buffer lowering toothed plate 69, without hindering the movement of the lifting frame 4; when the lifting frame 4 has a tendency to tilt to the right, the balance pressing plate 54 on the right side is compressed towards the direction close to the adjustment box 21, the elastic telescopic rod 55 is compressed with a shorter length, the balance pressing plate 54 drives the third connecting rod 74 to rotate, pushes the first connecting rod 72 to slide down along the guiding sliding sleeve 71, and through the two first connecting rods 73, pushes the two buffer lowering brackets 66 to unfold; after the buffer lowering brackets 66 are unfolded, they come into contact with the buffer lowering toothed plate 69 on the right side, and the buffer lowering toothed plate 69 provides auxiliary support for the buffer lowering brackets 66 on the right side, helping to reduce the tendency of tilting and falling on the right side, and improving the safety of the device. When the lifting frame 4 returns to balance, under the action of the elastic telescopic rod 55, the balance pressing plate 54 resets, and drives the first connecting rod 72, the second connecting rod 73 and the third connecting rod 74 to reset, so that the buffer lowering brackets 66 return to the retracted state.

[0120] Embodiment 8:

[0121] As Figure 5 、 6 shown, on the basis of the above Embodiment 3, a safety protection unit is provided on the balance box 51, and the safety protection unit includes:

[0122] The arc-shaped buffer plate 81, the arc-shaped buffer plate 81 is arranged below the balance box 51, and the height of the arc-shaped buffer plate 81 is lower than the height of the support frame 65.

[0123] The elastic members 82, a plurality of elastic members 82 are evenly connected between the arc-shaped buffer plate 81 and the balance box 51.

[0124] The working principle and beneficial effects of the above technical solution are as follows:

[0125] A safety protection unit is provided on the balance box 51. When the lifting frame 4 descends to the ground, the arc-shaped buffer plate 81 first contacts the ground, and the impact received above the lifting frame 4 is reduced through the arrangement of the elastic members 82, ensuring the stability during the transfer of the vehicle body and avoiding structural damage.

[0126] Example 9:

[0127] As Figure 5 、 6 shown in FIGS. 10 and 11, on the basis of the above Example 8, the safety protection unit further includes:

[0128] An airbag 83, which is connected between the arc-shaped buffer plate 81 and the balance box 51;

[0129] A safety box 84, which is connected to the bottom end of the balance box 51 and is located above the arc-shaped buffer plate 81;

[0130] A safety slider 85, the safety slider 85 includes a conical section at the lower part and a vertical section at the upper part. Limiting block grooves 86 are provided on both sides of the vertical section of the safety slider 85. Limiting blocks 87 are connected in the limiting block grooves 86 through springs. A conical groove 88 adapted to the conical section is provided at the bottom of the safety box 84. A sliding groove 89 for the safety slider 84 to slide is opened at the center of the safety box 84, and limiting holes 91 are provided on both sides of the sliding groove 89;

[0131] A transmission groove 92, which is symmetrically opened in the safety box 84 and is located on both sides of the conical groove 88;

[0132] A first transmission rod 93, the first transmission rod 93 is slidably connected in the horizontal section of the transmission groove 92. A spring is connected between the first transmission rod 93 and the end of the transmission groove 93. One end of the first transmission rod 93 extends into the conical groove 88 and slides relatively with the conical section of the safety slider 85;

[0133] A second transmission rod 94, the second transmission rod 94 includes an upper rod section 95, a connecting column 96 and a lower rod section 97 connected in sequence from top to bottom. A wedge-shaped surface is provided at the bottom end of the lower rod section 97. The wedge-shaped surface of the lower rod section 97 slides relatively with the end of the first transmission rod 93. The second transmission rod 94 is slidably arranged in the vertical section of the transmission groove 92. A first position sensor 98 and a second position sensor 99 are arranged on the transmission groove 92 from bottom to top in sequence. The first position sensor 98 is located at the connecting column 96, and the second position sensor 99 is located above the upper rod section 95. And the distance between the first position sensor 99 and the end of the lower rod section 97 is less than the distance between the second position sensor 99 and the end of the upper rod section 95;

[0134] An air charging pipe 90, which is connected to the top end of the safety box 84 and is used for inflating the airbag 83.

[0135] The working principle and beneficial effects of the above technical solution are:

[0136] When the safety protection unit is in use, when the lifting frame 4 is in a normal descending state, after the arc-shaped buffer plate 81 contacts the ground, it is pressed upward and moves closer to the balance box 51. The arc-shaped buffer plate 51 contacts the safety slider 85 and presses the safety slider 85 upward. The diameter of the tapered section of the safety slider 85 gradually decreases from bottom to top. The tapered section presses the first transmission rod 92 and moves away from the limit block groove 86. The other end of the first transmission rod 92 slides relative to the wedge-shaped surface of the lower rod section 97 of the second transmission rod 94, pressing the second transmission rod 94 to move upward. The lower rod section 97 contacts the first position sensor 98, indicating that the lifting frame 4 is at the lowest lifting position. The controller receives the in-place signal from the first sensor 98 and controls the motor to stop operating. At this time, the upper rod section 95 does not contact the second position sensor 99.

[0137] When the lifting frame 4 is in a falling state, the motor drive fails, further pressing the second transmission rod 94 to move upward. After the lower rod section 97 contacts the first position sensor 98, it continues to move until the upper rod section 95 contacts the second position sensor 99. The controller receives the in-place signal from the second position sensor 99 and starts the air pump to quickly inflate and expand the protective airbag 83 through the air filling pipe 90, increasing the distance between the arc-shaped buffer plate 81 and the balance box 51, and realizing buffering under the action of the protective airbag 83 and the elastic member 82. When the safety slider 85 is pressed and moves to the limit position, the safety slider 85 slides along the chute 89. The limit blocks 87 on both sides of the safety slider 85 are aligned with the limit holes 91 and are engaged with them, keeping the position of the safety slider 85 stable and making the in-place signal of the second position sensor 99 also in a stable state. After the maintenance is completed, manually separate the limit block 87 from the limit hole 91.

[0138] Through the above structural design, by adopting the safety protection unit, it can automatically identify the normal descending and falling states. When the lifting frame 4 is descending normally, the controller receives the in-place signal from the first sensor 98 and controls the motor to stop operating. The protective airbag 83 is in an uninflated state, avoiding excessive elastic force and height between the arc-shaped buffer plate 81 and the balance box 51, which may affect the descent of the lifting frame 4. When the lifting frame 4 is in a falling state, the controller receives the in-place signal from the second position sensor 99 and starts the air pump to quickly inflate and expand the protective airbag 83 through the air filling pipe 90, realizing buffering under the action of the protective airbag 83 and the elastic member 82, and further improving the protection effect against the fall of the lifting frame 4.

[0139] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0140] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communicable with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0141] Although the embodiments of the present invention have been disclosed as above, it is not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the examples shown and described herein.

Claims

1. A lifting structure for automobile painting, characterized in that: include: A column assembly (1), the top end of the column assembly (1) is connected to a lifting drive assembly (2), and the output end of the lifting drive assembly (2) is connected to a belt (3); A lifting frame (4), the lifting frame (4) is slidably arranged on the front side of the column assembly (1), the top end of the lifting frame (4) is connected to one end of the belt (3), and the lifting frame (4) is used to support the vehicle body; A balancing component, the balancing component is connected to the bottom end of the lifting frame (4), a movable counterweight wheel (53) is provided on the balancing component, and the balancing component is used to maintain a balanced state of the lifting frame (4); The lifting frame (4) is configured as a bent structure, comprising a lifting frame horizontal portion (41) and a lifting frame vertical portion (42), wherein the lifting frame vertical portion (42) is slidably connected to the front side of the column assembly (1), the lifting frame horizontal portion (41) is connected to the bottom end of the lifting frame vertical portion (42), and a semi-enclosed belt roller bed (6) is connected above the lifting frame horizontal portion (41), and the semi-enclosed belt roller bed (6) is used for conveying and clamping the vehicle body; The balancing assembly is connected to the rear side of the vertical portion (42) of the lifting frame, and the balancing assembly includes: A balance box (51), the balance box (51) is connected to the rear bottom end of the vertical portion (42) of the lifting frame; A counterweight wheel slide rail (52), the counterweight wheel slide rail (52) is connected to the bottom end of the balance box (51), and the counterweight wheel slide rail (52) is arranged in an arc shape; A counterweight wheel (53), the counterweight wheel (53) is slidably connected to the counterweight wheel slide rail (52) and is used to adjust the balance state of the lifting frame (4); A balancing pressure plate (54), the balancing pressure plate (54) is connected to both sides of the balancing box (51) through an elastic telescopic rod (55), the balancing pressure plate (54) is slidably connected to the inner wall of the vertical rod (11) of the column assembly (1), and a pressure sensor is connected to the balancing pressure plate (54) for detecting the pressure of the balancing pressure plate (54) acting on the vertical rod (11); The balancing assembly further includes a first leveling unit, the first leveling unit including: A toothed disc (56), the toothed disc (56) is rotatably connected to the center of the inner wall of the balance box (51), the rotating shaft of the toothed disc (56) is connected to the output end of the motor, and the motor is installed on the side wall of the balance box (51); Driven gears (57), two driven gears (57) are rotatably connected to the inner wall of the balance box (51), and meshingly connected to both sides of the toothed disc (56), and a wire wheel (58) is coaxially connected to the rotating shaft of the driven gear (57); A guide wheel (59), the guide wheel (59) is rotatably connected to the balance box (51) and is disposed close to a side wall of the balance box (51); A balancing rope (61), one end of which is wound around a wire wheel (58) on one side, and the balancing rope (61) is wound around a guide wheel (59) on one side, a counterweight wheel (53), and a guide wheel (59) on the other side in sequence, and then wound around a wire wheel (58) on the other side; The balancing assembly further includes a second leveling unit, the second leveling unit including: An adjusting rod (62), the adjusting rod (62) is eccentrically connected to the toothed disc (56), and when in a balanced position, the adjusting rod (62) is vertically arranged at the center of the toothed disc (56); A sliding sleeve (63) is hinged to the center of the inner wall of the balance box (51) and is located below the toothed disc (56). The lower part of the adjustment rod (62) is slidably arranged in the sliding sleeve (63); A counterweight ball (64), the counterweight ball (64) is connected to the bottom end of the adjustment rod (62); The balance box (51) is provided with a slow-down unit, which includes: Support frames (65), two support frames (65) are symmetrically connected to the bottom end of the balance box (51) and arranged obliquely; Slow-down brackets (66), the bottom ends of the two slow-down brackets (66) are hinged on the support frame (65); A slow-descent plate (67), the slow-descent plate (67) is connected to the inner side of the vertical rod (11) of the column assembly (1), a vertical slide groove (68) is provided on the slow-descent plate (67), the width of the vertical slide groove (68) is greater than the width of the slow-descent bracket (66) when it is folded, and less than the width of the slow-descent bracket (66) when it is unfolded, and a slow-descent tooth plate (69) is provided on the part of the slow-descent plate (67) located on both sides of the vertical slide groove (68), and the slow-descent bracket (66) contacts the slow-descent tooth plate (69) when it is unfolded; A guide sleeve (71), the guide sleeve (71) is connected to both sides of the balance box (51); A first connecting rod (72), the first connecting rod (72) is slidably connected to the guide sleeve (71) and is arranged vertically; A second connecting rod (73), wherein the two second connecting rods (73) are hinged to the bottom end of the first connecting rod (72), and the bottom ends of the two second connecting rods (73) are respectively hinged to the middle parts of the two slow-descent brackets (66); The third connecting rod (74) has two ends which are respectively hinged to the top end of the first connecting rod (72) and the inner side of the balance pressure plate (54).

2. The lifting structure for automobile painting according to claim 1, characterized in that: The lifting drive assembly (2) comprises a driving motor (21), a roller (22), a belt connecting frame (23) and a counterweight frame (24); the driving motor (21) is connected to the top of the column assembly (1); the output ends of the two driving motors (21) are simultaneously connected to the central roller (22); the belt connecting frame (23) is connected to the top of the lifting frame (4); the counterweight frame (24) is slidably connected to the rear side of the column assembly (1); the belt (3) is arranged in a double layer; the top of the belt (3) surrounds the roller (22); one end of the belt (3) located on the front side of the column assembly (1) is connected to the belt connecting frame (23); one end of the belt (3) located on the rear side of the column assembly (1) is connected to the counterweight frame (24); and a plurality of counterweight blocks are connected to the counterweight frame (24).

3. The lifting structure for automobile painting according to claim 1, characterized in that: The rear side of the column assembly (1) is connected to a maintenance transfer frame (5) for transferring the lift to a maintenance workshop for repair and maintenance.

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