Electrically-driven post-inflation device

Abstract

The invention discloses an electrically-driven post-inflation device, which belongs to the technical field of vulcanization equipment and comprises a fixed chuck, a movable chuck and a driving device, and the movable chuck moves close to or away from the fixed chuck under the control of the driving device; the driving device comprises a driving rod which is a lead screw; a height compensation device is arranged between the driving rod and the moving chuck, in the height compensation device, a flange plate is connected with the driving rod and a connecting shell, a floating cavity is formed in the connecting shell, a moving chuck connecting seat is connected with the moving chuck, and a part of the moving chuck connecting seat extends into the floating cavity; the movable chuck connecting base is connected with the connecting shell or the flange plate through a floating connecting structure, and the movable chuck is allowed to move away from the fixed chuck from the sealing position till reaching the shaping position of the movable chuck. The position precision of the moving chuck is high, the moving chuck can be accurately positioned when the tire is inflated, and the cooling and shaping size precision of the tire is high.

Description

Technical Field

[0001] This invention relates to the field of vulcanization equipment technology, and more specifically to an electrically driven post-inflation device. Background Art

[0002] The rear inflation unit is an important component of the tire vulcanizing machine, used to inflate, cool, and shape the tires that have reached a high temperature after vulcanization. During the tire inflation, cooling, and shaping process, the tire is first clamped and sealed by the two clamps of the rear inflation unit, and then air is inflated into the tire. The tire expands and cools during inflation, ultimately resulting in a tire with accurate dimensions and physical properties. Of the two clamps in the rear inflation unit, one is a fixed clamp and the other is a moving clamp. The fixed clamp is fixedly mounted on the rear inflation bracket, while the moving clamp moves towards or away from the fixed clamp under the action of the clamp drive device.

[0003] The existing vulcanizing machine's chuck drive device mostly adopts a hydraulic structure drive, which requires a matching hydraulic station and hydraulic pipeline, occupies a large space, and has high maintenance costs; moreover, the hydraulic cylinder is prone to oil leakage during use, which pollutes the environment and also affects the stability of equipment use; the control accuracy of the cylinder is affected by the temperature and pressure fluctuation of the hydraulic oil, and the positional accuracy of the moving chuck is low, which affects the cooling and shaping dimensional accuracy of the tire. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides an electrically driven rear inflation device with high positional accuracy of the moving chuck and precise positioning of the moving chuck during tire inflation, resulting in high dimensional accuracy of tire cooling and shaping.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: This invention provides an electrically driven rear-inflation device, including a rear-inflation bracket with inflation stations on it. Each inflation station is equipped with a fixed clamping plate, a movable clamping plate, and a driving device. The fixed clamping plate is mounted on the rear-inflation bracket, and the movable clamping plate moves closer to or away from the fixed clamping plate under the control of the driving device. The driving device includes a driving rod, which is a lead screw, and is connected to the movable clamping plate via a height compensation device. The height compensation device includes a flange, a connecting housing, and a movable clamping plate connecting seat. The flange connects the drive rod and the connecting housing; The connecting housing has a floating cavity inside, which opens on the side facing the fixed clamp; near the opening, the inner wall of the floating cavity forms a limiting surface facing the flange; The motion clamp connecting seat includes a clamp connecting body and a floating connecting body. The floating connecting body and the motion clamp are located on opposite sides of the clamp connecting body and are both fixedly connected to the clamp connecting body. The floating connecting body extends into the floating cavity, and a limiting platform is provided on the outer wall of the portion of the floating connecting body located inside the floating cavity. The limiting platform and the limiting surface cooperate to define the sealing position of the moving clamp; the floating connector is connected to the connecting shell or the flange through a floating connection structure, allowing the moving clamp to move away from the sealing position away from the fixed clamp until it reaches the fixed position of the moving clamp.

[0006] In the above-mentioned electrically driven rear inflation device, the clamp connector and the open end of the connecting housing cooperate to position the movable clamp in a fixed position. Alternatively, the end of the floating connector away from the clamp connector may cooperate with the connecting housing or the flange to position the moving clamp in a fixed position.

[0007] In the aforementioned electrically driven rear-inflation device, the floating connection structure includes a first elastic element, which applies an elastic force to the moving clamp connecting seat, causing the moving clamp connecting seat to tend to move toward the fixed clamp.

[0008] In the aforementioned electrically driven rear-inflation device, the floating connection structure includes two pull rods and a third elastic element; the two pull rods are combined in a V-shape, and the included angle between the two pull rods is adjustable, driving the moving clamp to move between a sealing position and a fixed position; the third elastic element connects the two pull rods and applies an elastic force to the two pull rods, causing the included angle between the two pull rods to tend to decrease.

[0009] In the above-mentioned electrically driven rear inflation device, the floating connection structure includes an adjustment cavity, the limiting platform and the connecting housing are slidably and sealingly engaged, and the adjustment cavity is formed on the side of the limiting platform away from the moving clamp; the adjustment cavity is connected to an air source.

[0010] In the above-mentioned electrically driven rear-inflation device, the floating connection structure includes a plurality of drive blocks, the drive blocks are located inside the connection housing, and the plurality of drive blocks are arranged around the upper end of the floating connection body; the drive blocks have axial extension portions and radial extension portions; The upper outer surface of the floating connector is a conical surface, and the side of the axial extension facing the floating connector is an inclined surface with the same inclination trend as the conical surface, and the inclined surface abuts against the conical surface of the floating connector. The connecting housing is provided with a plurality of radially extending adjustment channels. The radially extending portion extends into the adjustment channels. A second elastic element is provided between the radially extending portion and the connecting housing. The second elastic element applies a radially inward elastic force to the radially extending portion.

[0011] In the aforementioned electrically driven rear inflation device, a telescopic guide rod is provided at the outer end of the adjustment channel. The length of the telescopic guide rod extending into the adjustment channel is adjustable, thereby adjusting the outermost radial position of the radial extension.

[0012] In the aforementioned electrically driven rear-inflation device, the floating connection structure includes a first magnet and a second magnet, the first magnet and the second magnet having the same polarity; wherein, the first magnet is fixed on the connecting housing or the flange, and the second magnet is fixed on the moving clamp connecting seat.

[0013] In the aforementioned electrically driven rear inflation device, the second magnet is disposed at the end of the floating connector away from the moving clamp. And / or, the first magnet and the second magnet are electromagnets; And / or, the floating connector engages with the end of the connecting housing near the moving clamp to position the moving clamp in a fixed position.

[0014] In the aforementioned electrically driven rear inflation device, the rear inflation bracket has an upper inflation station and a lower inflation station arranged vertically; in the upper inflation station, the fixed clamp is located below the moving clamp; in the lower inflation station, the fixed clamp is located above the moving clamp. And / or, it also includes a tire pushing device for pushing the tire away from the fixed clamp or the moving clamp from top to bottom; And / or, the drive rod is a trapezoidal lead screw; And / or, it also includes a guiding device for guiding the movement of the moving chuck; And / or, the connecting housing includes two cylindrical bodies, each cylindrical body having a cylindrical shell, a first end plate and a second end plate, the first end plate and the second end plate being located at both ends of the cylindrical shell respectively, the first end plate being connected to the flange; after the two cylindrical bodies are joined together, the floating cavity is formed inside the cylindrical shell, the inner sides of the two second end plates form the opening of the floating cavity, and the sides of the two second end plates facing the flange form the limiting surface.

[0015] The beneficial effects of this invention are as follows: The electrically driven rear inflator utilizes a drive rod in conjunction with a height compensation device to ensure excellent sealing during the initial tire inflation stage and to position the moving chuck during tire inflation and cooling / shaping. This is achieved through a lead screw, particularly a trapezoidal lead screw, which offers high transmission control precision and allows for precise control of the flange and connecting housing positions within the height compensation device. The connecting housing engages with the moving chuck's connecting seat, giving the moving chuck two defined positions relative to the drive rod: a sealing position and a shaping position. In the sealing position, the moving chuck is closer to the fixed chuck than in the shaping position. This combination of the moving and fixed chucks effectively seals the tire, preventing air leakage during the initial inflation stage. As the tire inflates, the moving chuck is pushed from the sealing position to the shaping position. The distance between the moving and fixed chucks at this point corresponds to the tire's shaping axial dimension. Therefore, the shaping position of the moving chuck during tire inflation can be precisely controlled, resulting in high positional movement control accuracy, precise tire forming dimensions, and high quality.

[0016] During tire inflation, the height compensation device ensures that the moving and fixed chucks maintain an effective and reliable seal on the tire. The electrically driven rear inflation unit eliminates the need for a separate limit device for the moving chuck positioning, thus avoiding interference with the tire. Because the drive rod is a trapezoidal lead screw with a threaded connection structure that self-locks against the internal inflation pressure of the tire, the structure is simple and easy to maintain. The drive rod utilizes a motor to provide driving force, and closed-loop control ensures high positioning accuracy and reliable movement of the moving chucks, improving tire inflation and shaping quality and meeting green manufacturing requirements. The upper and lower inflation stations on the rear inflation bracket are rationally arranged, saving space. Attached Figure Description

[0017] Figure 1 Front view of the electrically driven rear inflation device; Figure 2 A three-dimensional structural diagram of an electrically driven rear inflation device; Figure 3 A partial enlarged view of the electrically driven rear inflation device; Figure 4 A schematic diagram of the first embodiment of the floating connection structure; Figure 5 This is a schematic diagram of the connecting shell in the first embodiment of the floating connection structure; Figure 6 A schematic diagram of the second embodiment of the floating connection structure; Figure 7 This is a schematic diagram of the third embodiment of the floating connection structure; Figure 8 This is a schematic diagram of the driving block in the third embodiment of the floating connection structure; Figure 9This is a schematic diagram of the fourth embodiment of the floating connection structure; Figure 10 This is a schematic diagram of the first structure of the connecting shell in the fourth embodiment of the floating connection structure; Figure 11 This is a schematic diagram of the second structure of the connecting shell in the fourth embodiment of the floating connection structure; Figure 12 This is a schematic diagram of the fifth embodiment of the floating connection structure; Figure 13 This is a schematic diagram of the sixth embodiment of the floating connection structure.

[0018] In the picture: 100 - Rear inflatable support; 200 - Fixed base; 300 - Fixed clamp; 400 - Moving clamp; 500 - Drive unit; 510 - Drive rod; 600 - Guide device; 610 - Guide shaft; 620 - Guide sleeve; 700 - Tire pusher; 800-Height compensation device; 810-Flange; 820-Connecting housing; 821-Column housing; 822-First end plate; 823-Second end plate; 824-Mounting groove; 825-Adjusting channel; 826-Closed cover plate; 830-Moving clamp connecting seat; 831-Floating connector; 832-Limiting platform; 833-Clamping connector; 834-Receiving groove; 850-Floating cavity; 860-Limiting surface; 910 - First elastic element; 921 - Drive block; 922 - Second elastic element; 923 - Telescopic guide rod; 924 - Inclined surface; 925 - Axial extension; 927 - Radial extension; 931 - Third elastic element; 932 - Pull rod; 933 - Limiting groove; 941 - First magnet; 942 - Second magnet; 951 - Adjustment cavity; 952 - Sealing ring. Detailed Implementation

[0019] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0020] Electrically driven rear inflation device such as Figures 1-4 As shown, the device includes a rear inflation bracket 100, on which inflation stations are provided. Each inflation station is equipped with a fixed clamping plate 300, a movable clamping plate 400, a drive device 500, a guide device 600, and a tire pushing device 700. The fixed clamping plate 300 and the movable clamping plate 400 are respectively arranged vertically. The fixed clamping plate 300 is mounted on the rear inflation bracket 100 via a fixed base 200. The movable clamping plate 400 is raised and lowered under the control of the drive device 500. The guide device 600 guides the raising and lowering movement of the movable clamping plate 400.

[0021] The rear inflation bracket 100 has at least one inflation station, or multiple stations can be arranged; preferably, such as Figure 1 , Figure 2 As shown, the rear inflation bracket 100 has two inflation stations, namely an upper inflation station and a lower inflation station, which are arranged vertically. In the upper inflation station, the fixed clamping plate 300 is located below the moving clamping plate 400; in the lower inflation station, the fixed clamping plate 300 is located above the moving clamping plate 400. The two fixed clamping plates 300 are located in the vertical middle of the rear inflation bracket 100, and the two moving clamping plates 400 are located at the upper and lower ends of the rear inflation bracket 100. The driving device 500 and the guiding device 600 that cooperate with the moving clamping plates 400 are also located at the upper and lower ends of the rear inflation bracket 100. The overall arrangement is compact and occupies little space.

[0022] To avoid the defects of existing hydraulically driven moving chuck 400, such as oil leakage and low motion accuracy, the drive device 500 includes a drive rod 510, which is a lead screw, with one end connected to the moving chuck 400. A motor and a nut sleeve are mounted on the rear inflation bracket 100. The motor's output shaft is connected to the nut sleeve via a coupling, reducer, or other transmission components. The nut sleeve is rotatably mounted on the rear inflation bracket 100 and threadedly connected to the drive rod 510. When the motor rotates, the drive rod 510 moves the moving chuck 400 closer to or away from the fixed chuck 300. The threaded connection between the drive rod 510 and the nut sleeve ensures that the position of the moving chuck 400 is controllable and highly accurate. The motor can be a servo motor or a standard three-phase asynchronous motor used with an external displacement sensor, with closed-loop control to ensure control accuracy.

[0023] It should be noted that the transmission structure and connection method between the motor and the nut sleeve, the control of the servo motor, and the use of the motor and the displacement sensor are all existing technologies and will not be elaborated here.

[0024] like Figure 3 As shown, the guide device 600 includes a guide shaft 610 and a guide sleeve 620. The guide sleeve 620 is fixed on the rear inflatable bracket 100. The guide shaft 610 and the guide sleeve 620 are slidably connected, and one end of the guide shaft 610 is connected to the moving clamp 400, allowing for synchronous lifting and lowering. It can be understood that the guide device 600 can also consist of a guide rail and a slider, one of which is connected to the rear inflatable bracket 100, and the other is connected to the moving clamp 400. The guide rail and the slider slide together to guide the movement of the moving clamp 400.

[0025] A height compensation device 800 is provided between the drive rod 510 and the moving chuck 400, such as Figure 4-13As shown, the height compensation device 800 includes a flange 810, a connecting housing 820, and a moving chuck connecting seat 830. The flange 810 and the moving chuck connecting seat 830 are respectively connected to the drive rod 510 and the moving chuck 400. The connecting housing 820 is located between the flange 810 and the moving chuck connecting seat 830, connecting the flange 810 and the moving chuck connecting seat 830.

[0026] Specifically, the flange 810 and the drive rod 510 are fixedly connected by welding or other methods. The connecting housing 820 is fixedly connected to the flange 810 and has a floating cavity 850 inside, which opens on the side facing the moving clamp 400. The moving clamp connecting seat 830 includes a clamp connecting body 833 and a floating connecting body 831. The floating connecting body 831 and the moving clamp 400 are located on opposite sides of the clamp connecting body 833 and are both fixedly connected to the clamp connecting body 833. The floating connecting body 831 extends into the floating cavity 850 from the opening of the floating cavity 850, and a limiting platform 832 is provided on the outer wall of the portion of the floating cavity 850 located inside the floating cavity 850. Near the opening, the inner wall of the floating cavity 850 forms a limiting surface 860 facing the flange 810. The limiting surface 860 and the limiting platform 832 cooperate, and when the two are in contact, the moving clamp 400 is in a sealed position.

[0027] The moving chuck connecting seat 830 is connected to the connecting housing 820 or flange 810 through a floating connection structure, which allows the moving chuck 400 to not only be in the sealing position, but also to move away from the sealing position away from the fixed chuck 300 until it reaches the shaping position. During the process of moving from the sealing position to the shaping position, the moving chuck 400 gradually increases the distance from the fixed chuck 300 to meet the sealing and tire shaping needs in the initial stage of tire inflation.

[0028] When the moving chuck 400 is working, it approaches the tire located on the fixed chuck 300 under the drive of the drive rod 510. During this process, the limiting surface 860 is in contact with the limiting platform 832, and the moving chuck 400 is in a sealed position before contacting the tire. After the moving chuck 400 contacts the tire, the tire begins to inflate and expand, the limiting surface 860 separates from the limiting platform 832, and the moving chuck 400 moves from the sealed position to the shaping position. After the moving chuck 400 reaches the shaping position, it remains in the shaping position to inflate, cool, and shape the tire until the tire cooling and shaping are complete. Because the shaping position of the moving chuck 400 is a fixed position, rather than using hydraulic control as in the prior art, the tire shaping effect is good and the precision is high.

[0029] like Figure 4 and Figure 5As shown, this is a first embodiment of the floating connection structure. The floating connection structure includes a first elastic element 910, which is a spring. One end of the spring abuts against the limiting platform 832. Depending on the structure of the connecting housing 820, the other end of the spring can abut against the connecting housing 820 or against the flange 810.

[0030] For example, the connecting housing 820 is assembled and joined together from two nearly semi-cylindrical cylindrical bodies; as Figure 5 As shown, each cylinder is a hollow structure, comprising a cylindrical shell 821, a first end plate 822, and a second end plate 823. The cylindrical shell 821 is arc-shaped, with its central angle preferably less than 180° to minimize interference when the two cylinders are joined. The first end plate 822 and the second end plate 823 are located at opposite ends of the cylindrical shell 821, and the three are fixedly connected, preferably as a single unit. Both the first end plate 822 and the flange 810 have mounting holes, and bolts, screws, and other fasteners are used to fix the first end plate 822 to the flange 810. The side of the second end plate 823 facing the flange 810 is part of the limiting surface 860. After the two cylinders are joined, a cylindrical floating cavity 850 is formed inside the cylindrical shell 821, and the inner sides of the two second end plates 823 form the opening of the floating cavity 850. The sides of the two second end plates 823 facing the flange 810 form the limiting surface 860. The spring rests against the first end plate 822, and the floating connector 831 extends partially into the spring, which can support and guide the deformation of the spring.

[0031] In this embodiment, the positioning of the moving clamp 400 can be achieved by the floating connector 831 cooperating with the connecting housing 820 or the flange 810. That is, after the end face of the floating connector 831 away from the clamp connector 833 contacts the connecting housing 820 or the flange 810, the moving clamp 400 can no longer move to the side away from the fixed clamp 300. When the second end plate 823 blocks the floating path of the floating connector 831, the floating connector 831 is pushed into the floating cavity 850 and cannot contact the flange 810, but only contacts the second end plate 823. At this time, the position of the floating connector 831 contacting the second end plate 823 is the fixed position of the moving clamp 400. If the second end plate 823 avoids the floating path of the floating connector 831, the floating connector 831 is pushed into the floating cavity 850 and cannot continue to move after contacting the flange 810. At this time, the position of the floating connector 831 contacting the flange 810 is the fixed position of the moving clamp 400.

[0032] The positioning of the moving chuck 400 can also be achieved by the chuck connector 833 cooperating with the second end plate 823. That is, after the chuck connector 833 is attached to the opening of the connecting housing 820, the moving chuck 400 can no longer move away from the fixed chuck 300.

[0033] The first elastic element 910 applies an elastic force to the moving clamp connecting seat 830. This elastic force tends to push the limiting platform 832 into contact with the limiting surface 860, thus maintaining the moving clamp 400 in the sealed position. Tire inflation applies a thrust to the moving clamp 400, pushing it away from the fixed clamp 300. At this time, the first elastic element 910 undergoes elastic deformation, and the moving clamp 400 moves away from the sealed position towards the fixed position until it reaches the fixed position.

[0034] When using it, take the above inflation station as an example: After the tire vulcanization is completed, the tire unloading operator places the tire on the fixed clamp 300; the control drive rod 510 descends, during which the first elastic element 910 pushes the moving clamp connecting seat 830 so that the limiting platform 832 contacts the limiting surface 860, and the moving clamp 400 is in the sealed position.

[0035] After the moving chuck 400 contacts the tire, it continues to move downward until it reaches the set position. During this process, the first elastic element 910 is compressed, the limiting platform 832 of the floating connector 831 separates from the limiting surface 860, and the moving chuck 400 is in a set position between the sealing position and the fixed position. Under the action of the first elastic element 910, the moving chuck 400 and the fixed chuck 300 are in close contact with the tire, and the moving chuck 400 and the fixed chuck 300 form a clamp at both ends of the tire's axial direction, thus forming a reliable seal for the tire.

[0036] During inflation, the tire pressure increases, exerting an upward force on the moving chuck 400. Due to the presence of the first elastic element 910, the moving chuck 400 can rise. The moving chuck 400 overcomes the action of the first elastic element 910 and moves upward from the sealing position to the shaping position until it reaches the shaping position. The distance between the moving chuck 400 and the fixed chuck 300 is the required shaping height of the tire. Based on the self-locking of the drive rod 510, the moving chuck 400 cannot move further upward during continued inflation. All inflation pressure acting on the moving chuck 400 is transmitted to the drive rod 510 through the moving chuck connecting seat 830, connecting housing 820, and flange 810. The reaction force provided by the drive rod 510 counteracts the inflation pressure, thus completing the entire inflation process.

[0037] like Figure 6 As shown, this is a second embodiment of the floating connection structure; the difference between the floating connection structure and the first embodiment is that the first elastic element 910 is an air spring.

[0038] Furthermore, the upper end surface of the floating connector 831 is provided with a receiving groove 834, and the air spring is located in the receiving groove 834 and extends upward and outward from the receiving groove 834; the receiving groove 834 can limit the expansion and contraction shape of the air spring.

[0039] like Figure 7 and Figure 8 The diagram shows a third embodiment of the floating connection structure. The floating connection structure includes multiple drive blocks 921 located within the connecting housing 820. The upper outer surface of the floating connector 831 is a conical surface, with the end of the conical surface near the limiting platform 832 being the larger end. The multiple drive blocks 921 are spaced apart around the conical surface. Each drive block 921 has an axial extension 925 and a radial extension 927. The side of the axial extension 925 facing the floating connector 831 is an inclined surface 924 with the same inclination as the conical surface. The inclined surface 924 is located at the end of the axial extension 925 facing the floating connector 831 and abuts against the conical surface of the floating connector 831.

[0040] The connecting housing 820 is provided with a plurality of radially extending adjustment channels 825. Radial extensions 927 extend into the adjustment channels 825 and can slide relative to each other. A second elastic element 922 is provided between the radial extensions 927 and the connecting housing 820. The second elastic element 922 applies a radially inward elastic force to the radial extensions 927, which tends to push the drive block 921 against the floating connector 831. For example, the second elastic element 922 is a spring. The radially outer opening of the adjustment channel 825 is closed by a sealing cover plate 826, which is fixed to the connecting housing 820 by bolts or the like. The two ends of the spring abut against the radial extensions 927 and the sealing cover plate 826, respectively.

[0041] Multiple drive blocks 921 are arranged in a ring. When the tire is not inflated, the second elastic element 922 pushes the drive blocks 921 radially inward and against the conical surface of the floating connector 831, pushing the floating connector 831 downward so that the moving clamp 400 is in the sealed position. When the tire is inflated, the drive blocks 921 are subjected to the force generated by the tire expansion. Due to the cooperation between the inclined surface 924 and the conical surface, this force is converted into a force that pushes the drive blocks 921 radially outward. The second elastic element 922 is compressed until the drive blocks 921 reach the outermost radial position, and the moving clamp 400 reaches the shaping position. At this time, the distance between the moving clamp 400 and the fixed clamp is the size required for tire shaping. The outermost radial position of the drive block 921 can be the position where the outer side of the axial extension 925 is in contact with the inner side of the connecting housing 820, or the position where the radial extension 927 is in contact with the closing cover plate 826.

[0042] Furthermore, the production of tires of different specifications can be accommodated by adjusting the outermost radial position of the drive block 921. For example, the cover plate 826 is adjustablely equipped with a telescopic guide rod 923, which is threadedly connected to the cover plate 826. The telescopic guide rod 923 extends into the adjustment channel 825, and a spring is fitted around its outer side. The outermost radial position of the radial extension 927 can be adjusted by changing the length of the telescopic guide rod 923 extending into the adjustment channel 825.

[0043] like Figure 9 , Figure 10 and Figure 11 The diagram shows a fourth embodiment of the floating connection structure. The floating connection structure includes two tie rods 932 and a third elastic element 931. The two tie rods 932 are combined in a V-shape with an adjustable angle. The two tie rods 932 are respectively connected to the third elastic element 931, and the third elastic element 931 applies an elastic force to the two tie rods 932, causing the angle between the two tie rods 932 to tend to decrease.

[0044] The two tie rods 932 are configured such that one end of each other is a hinged end, and the other end is a sliding end. The hinged end of the tie rod 932 can be rotatably connected to the floating connector 831, while the sliding end can be slidably connected to the first end plate 822 or the flange 810. To limit the movement path of the sliding end of the tie rod 932, a guide structure is provided on the first end plate 822 or the flange 810, for example... Figure 10 and 11 The limiting groove 933 shown can also adopt a guide structure commonly used in existing technologies, such as a guide rail. Understandably, the hinged end of the tie rod 932 can also be rotatably mounted on the first end plate 822 or the flange 810. In this case, a guide structure needs to be set on the floating connector 831 to guide the movement of the sliding end of the tie rod 932.

[0045] Figure 9-11 An embodiment is shown in which a limiting groove 933 is disposed on a first end plate 822, wherein the limiting groove 933 extends radially and can be as follows: Figure 10 As shown, a mounting groove 824 is formed in the middle of the first end plate 822, and a limiting groove 933 is provided on the side wall opposite to the mounting groove 824; or, as Figure 11 As shown, the limiting groove 933 is provided on the mating plane of the first end plate 822. The hinged end of the pull rod 932 is connected to the floating connector 831, and the sliding end is engaged with and slidably connected to the limiting groove 933.

[0046] As the angle between the two tie rods 932 changes, the floating connector 831 has a vertical floating range. When the angle between the two tie rods 932 is at its minimum, the limiting platform 832 of the floating connector 831 contacts the limiting surface 860, and the moving clamp 400 is in the sealed position. When the tire expands and applies force to the floating connector 831, the third elastic element 931 is elastically stretched, and the angle between the two tie rods 932 is at its maximum. Until the angle between the two tie rods 932 is at its maximum, the moving clamp 400 reaches the fixed position.

[0047] In this embodiment, the positioning groove 933 can be used to position the moving clamp 400. That is, when the angle between the two pull rods 932 is at its maximum, the pull rod 932 is at one end of the positioning groove 933, and the clamp connecting body 833 and the connecting housing 820 do not interfere with each other. Alternatively, the floating connecting body 831 can be used in conjunction with the connecting housing 820 to position the moving clamp 400. That is, the clamp connecting body 833 and the connecting housing 820 are used to limit the positioning of the moving clamp 400. In this case, the length of the positioning groove 933 can be greater than or equal to the sliding stroke of the pull rod 932 within the positioning groove 933.

[0048] like Figure 12 The diagram shows a fifth embodiment of the floating connection structure. The floating connection structure includes a first magnet 941 and a second magnet 942, which have the same polarity and repel each other. The first magnet 941 is fixed to the connecting housing 820 or the flange 810, and the second magnet 942 is fixed to the moving clamp connecting seat 830, preferably disposed on the floating connector 831, located within the connecting housing 820.

[0049] The first magnet 941 and the second magnet 942 are preferably electromagnets, which can control and change the magnitude of the magnetic force.

[0050] The mutual repulsion between the first magnet 941 and the second magnet 942 causes the limiting platform 832 to tend to approach the limiting surface 860. When the limiting platform 832 contacts the limiting surface 860, the moving clamp 400 is in a sealed position. When the tire is inflated, the moving clamp 400 drives the second magnet 942 to overcome the repulsive force and move closer to the first magnet 941. To avoid rigid contact between the first magnet 941 and the second magnet 942, the clamp connector 833 and the connecting housing 820 can be used to position the moving clamp 400.

[0051] like Figure 13The diagram shows a sixth embodiment of the floating connection structure. The floating connection structure includes an adjustment cavity 951, a limiting platform 832 that slides in contact with the connecting housing 820, and a sealing ring 952 on the limiting platform 832. A sealed adjustment cavity 951 is formed on the side of the limiting platform 832 facing away from the moving clamp 400. The adjustment cavity 951 is connected to an air source. During use, gas at a certain pressure is pumped into the adjustment cavity 951 to cause the moving clamp 400 to be in the sealed position. The fixed position of the moving clamp 400 can be positioned by the cooperation of the floating connection part 831 and the connecting housing 820, that is, the clamp connecting body 833 and the second end plate 823 of the connecting housing 820 cooperate to position the fixed position of the moving clamp 400. During the movement of the moving clamp 400 from the sealed position to the fixed position, the adjustment cavity 951 maintains a certain pressure, ensuring a good seal between the moving clamp 400 and the tire.

[0052] After the tire has cooled and set, the tire is pushed away from the moving clamp 400 or the fixed clamp 300 by the tire pushing device 700. For example, the moving clamp 400 of the upper inflation station is equipped with the tire pushing device 700, and the fixed clamp 300 of the lower inflation station is equipped with the tire pushing device 700. The tire pushing device 700 consists of a cylinder and a tire pushing block. The cylinder can push the tire pushing block to move up and down. After inflation and setting are completed, the tire pushing device 700 is used to detach the tire from the moving clamp 400 or the fixed clamp 300 from top to bottom.

[0053] The vulcanizing machine using the above-mentioned electrically driven rear inflation device can adapt to different tire sizes by adjusting the drive rod 510 and setting the first and second limit positions. For tires with the same float, the production of tires of different sizes can be achieved simply by controlling the drive rod. The moving chuck 400 has high positional accuracy, so there is no need to adjust the fixed chuck 300.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An electrically driven rear-inflation device, comprising a rear-inflation bracket (100), wherein an inflation station is provided on the rear-inflation bracket (100), each inflation station being provided with a fixed clamping plate (300), a movable clamping plate (400), and a driving device (500), wherein the fixed clamping plate (300) is mounted on the rear-inflation bracket (100), and the movable clamping plate (400) moves toward or away from the fixed clamping plate (300) under the control of the driving device (500); characterized in that, The drive device (500) includes a drive rod (510), which is a lead screw and is connected to the motion chuck (400) through a height compensation device (800); the height compensation device (800) includes a flange (810), a connecting housing (820), and a motion chuck connecting seat (830). The flange (810) connects the drive rod (510) and the connecting housing (820). The connecting housing (820) has a floating cavity (850) inside, which opens on the side facing the fixed clamp (300); near the opening, the inner wall of the floating cavity (850) forms a limiting surface (860) facing the flange (810). The motion clamp connecting seat (830) includes a clamp connecting body (833) and a floating connecting body (831). The floating connecting body (831) and the motion clamp (400) are located on opposite sides of the clamp connecting body (833) and are both fixedly connected to the clamp connecting body (833). The floating connecting body (831) extends into the floating cavity (850), and a limiting platform (832) is provided on the outer wall of the portion of the floating connecting body (850) located inside the floating cavity (850). The limiting platform (832) cooperates with the limiting surface (860) to define the sealing position of the moving clamp (400); the floating connector (831) is connected to the connecting housing (820) or the flange (810) through a floating connection structure, allowing the moving clamp (400) to move away from the sealing position away from the fixed clamp (300) until it reaches the fixed position of the moving clamp (400).

2. The electrically driven rear-inflation device according to claim 1, characterized in that, The clamp connector (833) and the open end of the connecting housing (820) cooperate to position the moving clamp (400) in a fixed position; Alternatively, the end of the floating connector (831) away from the clamp connector (833) may cooperate with the connecting housing (820) or the flange (810) to position the moving clamp (400).

3. The electrically driven rear-inflation device according to claim 1, characterized in that, The floating connection structure includes a first elastic element (910) that applies an elastic force to the moving chuck connecting seat (830), causing the moving chuck connecting seat (830) to tend to move toward the fixed chuck (300).

4. The electrically driven rear-inflation device according to claim 1, characterized in that, The floating connection structure includes two tie rods (932) and a third elastic element (931); the two tie rods (932) are combined into a V-shape, and the included angle between the two tie rods (932) is adjustable, driving the motion clamp (400) to move between the sealing position and the fixed position; the third elastic element (931) connects the two tie rods (932) and applies an elastic force to the two tie rods (932), so that the included angle between the two tie rods (932) tends to decrease.

5. The electrically driven rear-inflation device according to claim 1, characterized in that, The floating connection structure includes an adjustment cavity (951), the limiting platform (832) and the connecting housing (820) slide and seal together, and the adjustment cavity (951) is formed on the side of the limiting platform (832) away from the moving clamp (400); the adjustment cavity (951) is connected to an air source.

6. The electrically driven rear-inflation device according to claim 1, characterized in that, The floating connection structure includes a plurality of drive blocks (921), which are located inside the connection housing (820) and are arranged around the upper end of the floating connection body (831); the drive blocks (921) have an axial extension (925) and a radial extension (927). The upper outer surface of the floating connector (831) is a conical surface, and the side of the axial extension (925) facing the floating connector (831) is an inclined surface (924) with the same inclination trend as the conical surface. The inclined surface (924) abuts against the conical surface of the floating connector (831). The connecting housing (820) is provided with a plurality of radially extending adjustment channels (825), the radial extension (927) extends into the adjustment channels (825), and a second elastic element (922) is provided between the radial extension (927) and the connecting housing (820). The second elastic element (922) applies a radially inward elastic force to the radial extension (927).

7. The electrically driven rear-inflation device according to claim 6, characterized in that, The outer end of the adjustment channel (825) is provided with a telescopic guide rod (923), the length of which the telescopic guide rod (923) extends into the adjustment channel (825) is adjustable, thereby adjusting the outermost radial position of the radial extension (927).

8. The electrically driven rear-inflation device according to claim 1, characterized in that, The floating connection structure includes a first magnet (941) and a second magnet (942), the first magnet (941) and the second magnet (942) having the same polarity; wherein, the first magnet (941) is fixed on the connecting housing (820) or the flange (810), and the second magnet (942) is fixed on the moving chuck connecting seat (830).

9. The electrically driven rear-inflation device according to claim 8, characterized in that, The second magnet (942) is disposed at one end of the floating connector (831) away from the moving chuck (400); And / or, the first magnet (941) and the second magnet (942) are electromagnets; And / or, the floating connector (831) and the connecting housing (820) cooperate to position the motion chuck (400) at one end near the motion chuck (400).

10. An electrically driven rear-inflation device according to any one of claims 1-9, characterized in that, The rear inflation bracket (100) has an upper inflation station and a lower inflation station arranged vertically; in the upper inflation station, the fixed clamp (300) is located below the moving clamp (400); in the lower inflation station, the fixed clamp (300) is located above the moving clamp (400). And / or, it also includes a tire pusher (700) for pushing the tire away from the fixed chuck (300) or the moving chuck (400) from top to bottom. And / or, the drive rod (510) is a trapezoidal lead screw; And / or, it also includes a guide device (600) for guiding the movement of the motion chuck (400); And / or, the connecting housing (820) includes two cylindrical bodies, each of which has a cylindrical shell (821), a first end plate (822) and a second end plate (823), the first end plate (822) and the second end plate (823) being located at both ends of the cylindrical shell (821), the first end plate (822) being connected to the flange (810); after the two cylindrical bodies are joined together, the floating cavity (850) is formed inside the cylindrical shell (821), the inner sides of the two second end plates (823) form the opening of the floating cavity (850), and the sides of the two second end plates (823) facing the flange (810) form the limiting surface (860).

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