A power driven rear inflator device

Abstract

The application discloses a power-driven rear inflation device, which belongs to the technical field of vulcanization equipment and comprises a fixed chuck, a movable chuck and a driving device. 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, and the driving rod is a screw rod. A height compensation device is arranged between the driving rod and the movable chuck. In the height compensation device, a flange plate is connected with the driving rod and a connecting shell. The connecting shell is internally provided with a floating cavity. A movable chuck connecting seat is connected with the movable chuck and partially extends into the floating cavity. A limiting table and a limiting surface are used to limit the sealing position of the movable chuck. The movable chuck connecting seat and the connecting shell or the flange plate are connected through a floating connection structure, so that the movable chuck is allowed to move away from the fixed chuck from the sealing position to a shaping position of the movable chuck. The position accuracy of the movable chuck is high, the movable chuck can be accurately positioned when the tire is inflated, and the tire cooling shaping size accuracy 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 Technology

[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:

[0006] 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.

[0007] The flange connects the drive rod and the connecting housing;

[0008] 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;

[0009] The moving chuck connecting seat comprises a chuck connecting body and a floating connecting body, the floating connecting body is located on the opposite sides of the chuck connecting body respectively, and is fixedly connected with the chuck connecting body; the floating connecting body extends into the floating cavity, and a limiting table is arranged on the outer side wall of the floating cavity;

[0010] The limiting table cooperates with the limiting face to limit the sealing position of the moving chuck; the floating connecting body is connected with the connecting shell or the flange plate through a floating connecting structure, allowing the moving chuck to move away from the fixed chuck until reaching the shaping position of the moving chuck.

[0011] In the above-mentioned power-driven rear inflation device, the chuck connecting body cooperates with the opening end of the connecting shell to position the shaping position of the moving chuck;

[0012] Alternatively, the end of the floating connecting body away from the chuck connecting body cooperates with the connecting shell or the flange plate to position the shaping position of the moving chuck.

[0013] In the above-mentioned power-driven rear inflation device, the floating connecting structure comprises a first elastic element, the first elastic element exerts an elastic force on the moving chuck connecting seat, so that the moving chuck connecting seat has a tendency to move towards the fixed chuck.

[0014] In the above-mentioned power-driven rear inflation device, the floating connecting structure comprises 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 chuck to move between the sealing position and the shaping position; the third elastic element is connected between the two pull rods, and exerts an elastic force on the two pull rods, so that the included angle between the two pull rods has a tendency to decrease.

[0015] In the above-mentioned power-driven rear inflation device, the floating connecting structure comprises an adjusting cavity, the limiting table and the connecting shell are in sliding and sealing cooperation, and the adjusting cavity is formed on the side of the limiting table away from the moving chuck; the adjusting cavity is communicated with a gas source.

[0016] In the above-mentioned power-driven rear inflation device, the floating connecting structure comprises a plurality of driving blocks, the driving blocks are located in the connecting shell, and the driving blocks are arranged around the upper end of the floating connecting body; the driving block has an axial extension and a radial extension;

[0017] The outer side surface of the upper end of the floating connecting body is a tapered surface, the side surface of the axial extension towards the floating connecting body is a bevel surface with the same inclination tendency as the tapered surface, and the bevel surface abuts against the tapered surface of the floating connecting body;

[0018] The connecting housing is provided with several radially extending adjustment channels, the radial extension extends into the adjustment channel, and a second elastic element is arranged between the radial extension and the connecting housing, which exerts an elastic force radially inward on the radial extension.

[0019] In the above-mentioned power-driven rear inflation device, the outer end of the adjustment channel is provided with a telescopic guide rod, the telescopic guide rod extends into the adjustment channel with adjustable length, thereby adjusting the radially outermost position of the radial extension.

[0020] In the above-mentioned power-driven rear inflation device, the floating connection structure includes a first magnet and a second magnet, the first magnet and the second magnet have the same polarity; wherein the first magnet is fixed on the connecting housing or the flange plate, and the second magnet is fixed on the moving chuck connecting seat.

[0021] In the above-mentioned power-driven rear inflation device, the second magnet is arranged at the end of the floating connecting body away from the moving chuck;

[0022] And / or, the first magnet and the second magnet are electromagnets;

[0023] And / or, the floating connecting body and the connecting housing cooperate to position the moving chuck at the end close to the moving chuck.

[0024] In the above-mentioned power-driven rear inflation device, the rear inflation support has an upper inflation station and a lower inflation station arranged vertically; in the upper inflation station, the fixed chuck is located below the moving chuck; in the lower inflation station, the fixed chuck is located above the moving chuck;

[0025] And / or, further comprising a tire pushing device for pushing the tire away from the fixed chuck or the moving chuck from top to bottom;

[0026] And / or, the drive rod is a trapezoidal screw;

[0027] And / or, further comprising a guide device for guiding the movement of the moving chuck;

[0028] And / or, the connecting housing includes two cylinders, each of which has a cylindrical shell, a first end plate and a second end plate, the first end plate and the second end plate are respectively located at both ends of the cylindrical shell, and the first end plate is connected with the flange plate; after the two cylinders are connected, the floating cavity is formed inside the cylindrical shell, the inside of the two second end plates forms the opening of the floating cavity, and the side faces of the two second end plates towards the flange plate constitute the limiting surface.

[0029] The beneficial effects of the present application are reflected in:

[0030] The power-driven rear inflation device cooperates with the height compensation device through the driving rod, which not only ensures good sealing of the tire in the initial stage of inflation, but also positions the position of the moving clamp during tire inflation, cooling and shaping; in that the driving rod adopts a screw rod, especially a trapezoidal screw rod, which has high transmission control precision and can accurately control the position of the flange plate and the connecting shell in the height compensation device; the connecting shell cooperates with the moving clamp connecting seat, so that the moving clamp has two determined positions relative to the driving rod, i.e. the sealing position and the shaping position. Compared with the shaping position, the moving clamp is closer to the fixed clamp when it is in the sealing position. At this time, the moving clamp and the fixed clamp cooperate to form effective sealing of the tire, avoiding air leakage in the initial stage of inflation. The tire inflation expands the moving clamp from the sealing position to the shaping position. At this time, the distance between the moving clamp and the fixed clamp corresponds to the axial size of the tire shaping, so the shaping position of the moving clamp during tire inflation can be accurately controlled, the position movement control precision is high, the tire shaping size is accurate, and the quality is high.

[0031] During the tire inflation process, the height compensation device also ensures that the moving clamp and the fixed clamp maintain effective and reliable sealing of the tire at all times. The power-driven rear inflation device does not need to separately set a limiting device for positioning the moving clamp, and also avoids interference with the tire. Since the driving rod is a trapezoidal screw rod, the threaded connection structure can be self-locked against the internal inflation pressure of the tire, the structure is simple, and maintenance is convenient; the driving rod uses a motor to provide driving force, and closed-loop control ensures high positioning accuracy, reliable movement of the moving clamp, which can improve the quality of tire inflation and shaping, and meet the requirements of green manufacturing; the upper inflation station and the lower inflation station on the rear inflation support are reasonably arranged, saving space. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a front view of the power-driven rear inflation device;

[0033] Figure 2 It is a perspective structural schematic view of the power-driven rear inflation device;

[0034] Figure 3 It is a local enlarged view of the power-driven rear inflation device;

[0035] Figure 4 It is a structural schematic view of the first embodiment of the floating connection structure;

[0036] Figure 5 It is a structural schematic view of the connecting shell in the first embodiment of the floating connection structure;

[0037] Figure 6 It is a structural schematic view of the second embodiment of the floating connection structure;

[0038] Figure 7 Structure diagram of the third embodiment of the floating connection structure;

[0039] Figure 8 Structure diagram of the driving block in the third embodiment of the floating connection structure;

[0040] Figure 9 Structure diagram of the fourth embodiment of the floating connection structure;

[0041] Figure 10 Structure diagram of the first structure of the connecting housing in the fourth embodiment of the floating connection structure;

[0042] Figure 11 Structure diagram of the second structure of the connecting housing in the fourth embodiment of the floating connection structure;

[0043] Figure 12 Structure diagram of the fifth embodiment of the floating connection structure;

[0044] Figure 13 Structure diagram of the sixth embodiment of the floating connection structure.

[0045] In the drawings:

[0046] 100 - rear inflation support; 200 - fixed seat; 300 - fixed chuck; 400 - moving chuck;

[0047] 500 - driving device; 510 - driving rod;

[0048] 600 - guiding device; 610 - guiding shaft; 620 - guiding sleeve;

[0049] 700 - tire pushing device;

[0050] 800 - height compensation device; 810 - flange; 820 - connecting housing; 821 - column shell; 822 - first end plate; 823 - second end plate; 824 - mounting groove; 825 - adjusting channel; 826 - closing cover plate; 830 - moving chuck connecting seat; 831 - floating connecting body; 832 - limiting table; 833 - chuck connecting body; 834 - containing groove; 850 - floating cavity; 860 - limiting surface;

[0051] 910 - first elastic element; 921 - driving block; 922 - second elastic element; 923 - telescopic guiding 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 - adjusting cavity; 952 - sealing ring. DETAILED DESCRIPTION

[0052] In order to facilitate the understanding of those skilled in the art, the present application is further described below in conjunction with the drawings.

[0053] The power-driven rear tire inflation device, as shown in Figures 1-4 includes a rear tire inflation support 100, on which tire inflation stations are arranged. Each tire inflation station is provided with a fixed chuck 300, a movable chuck 400, a driving device 500, a guide device 600 and a tire pushing device 700; wherein the fixed chuck 300 and the movable chuck 400 are arranged above and below respectively, the fixed chuck 300 is installed on the rear tire inflation support 100 through a fixed seat 200, the movable chuck 400 is lifted under the control of the driving device 500, and the guide device 600 guides the lifting movement of the movable chuck 400.

[0054] The rear tire inflation support 100 is provided with at least one tire inflation station, and a plurality of tire inflation stations can also be arranged; preferably, as shown in Figure 1 , Figure 2 The rear tire inflation support 100 is provided with two tire inflation stations, which are an upper tire inflation station and a lower tire inflation station arranged above and below respectively. In the upper tire inflation station, the fixed chuck 300 is located at the lower side of the movable chuck 400; in the lower tire inflation station, the fixed chuck 300 is located at the upper side of the movable chuck 400; the two fixed chucks 300 are located at the vertical middle part of the rear tire inflation support 100, the two movable chucks 400 are located at the upper and lower end parts of the rear tire inflation support 100, and the driving device 500 and the guide device 600 cooperating with the movable chuck 400 are also located at the upper and lower end parts of the rear tire inflation support 100, so that the overall arrangement structure is compact and occupies small space.

[0055] In order to avoid the defects such as oil leakage and low movement precision of the hydraulic driving movable chuck 400 in the prior art, the driving device 500 includes a driving rod 510, which is a lead screw and is connected to the movable chuck 400 at one end. A motor and a nut sleeve are arranged on the rear tire inflation support 100, the output shaft of the motor is drivingly connected to the nut sleeve by using transmission elements such as a shaft coupling and a speed reducer, and the nut sleeve is rotatably installed on the rear tire inflation support 100 and is threadedly connected to the driving rod 510. When the motor rotates, the driving rod 510 moves the movable chuck 400 close to or away from the fixed chuck 300. The threadedly connected mode of the driving rod 510 and the nut sleeve makes the position of the movable chuck 400 controllable and high in position precision; the motor can be a servo motor, or a common three-phase asynchronous motor can be used in cooperation with an external displacement sensor, and closed-loop control is used to ensure control precision.

[0056] It should be noted that the transmission structure and transmission connection mode of the motor and the nut sleeve, the control of the servo motor and the cooperation of the motor and the displacement sensor are all prior art, which will not be described here.

[0057] As shown in Figure 3As shown, the guiding device 600 comprises a guiding shaft 610 and a guiding sleeve 620, the guiding sleeve 620 is fixed on the rear pneumatic support 100, the guiding shaft 610 and the guiding sleeve 620 are in sliding connection and the guiding shaft 610 is connected with the moving chuck 400 at one end and synchronously lifts and lowers. It can be understood that the guiding device 600 can also be composed of a guide rail and a sliding block, one of which is connected with the rear pneumatic support 100 and the other is connected with the moving chuck 400, and the guide rail and the sliding block are in sliding fit to guide the movement of the moving chuck 400.

[0058] The driving rod 510 and the moving chuck 400 are provided with a height compensation device 800, as shown in the figure. Figures 4-13 As shown, the height compensation device 800 comprises a flange plate 810, a connecting shell 820 and a moving chuck connecting seat 830. The flange plate 810 and the moving chuck connecting seat 830 are connected with the driving rod 510 and the moving chuck 400 respectively, the connecting shell 820 is located between the flange plate 810 and the moving chuck connecting seat 830 and connects the flange plate 810 and the moving chuck connecting seat 830.

[0059] Specifically, the flange plate 810 is fixedly connected with the driving rod 510 by welding or the like. The connecting shell 820 is fixedly connected with the flange plate 810 and has a floating cavity 850 in the inside, the floating cavity 850 is open at the side facing the moving chuck 400. The moving chuck connecting seat 830 comprises a chuck connecting body 833 and a floating connecting body 831, the floating connecting body 831 is located at the opposite sides of the chuck connecting body 833 respectively and is fixedly connected with the chuck 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 arranged on the outer side wall of the part of the floating connecting body 831 located in the floating cavity 850. Near the opening, the inner wall of the floating cavity 850 forms a limiting surface 860 facing the flange plate 810, the limiting surface 860 cooperates with the limiting platform 832, when the two are in close contact, the moving chuck 400 is in a sealed position.

[0060] The moving chuck connecting seat 830 is connected with the connecting shell 820 or the flange plate 810 through the floating connecting structure, so as to allow the moving chuck 400 not only to be in the sealed position, but also to move away from the fixed chuck 300 from the sealed position to a setting position. The distance between the moving chuck 400 and the fixed chuck 300 gradually increases during the movement of the moving chuck 400 from the sealed position to the setting position, so as to meet the needs of sealing in the initial stage of tire inflation and tire setting.

[0061] When the movable chuck 400 works, the movable chuck 400 is driven by the driving rod 510 to approach the tire on the fixed chuck 300. In this process, the limiting surface 860 is in contact with the limiting platform 832, and the movable chuck 400 is in the sealing position before contacting the tire. After the movable chuck 400 contacts the tire, the tire starts to inflate and expand, the limiting surface 860 is separated from the limiting platform 832, and the movable chuck 400 moves from the sealing position to the shaping position. After the movable chuck 400 reaches the shaping position, the movable chuck 400 is maintained in the shaping position to inflate, cool and shape the tire until the cooling and shaping of the tire are completed. Since the shaping position of the movable chuck 400 is a fixed position, rather than being controlled by hydraulic pressure in the prior art, the tire shaping effect is good and the precision is high.

[0062] As shown in Figure 4 and Figure 5 , it is the first embodiment of the floating connection structure; the floating connection structure includes a first elastic element 910, which is a spring, one end of which abuts against the limiting platform 832, and based on the different structures of the connecting shell 820, the other end of the spring can abut against the connecting shell 820 or the flange plate 810.

[0063] Exemplarily, the connecting shell 820 is composed of two approximately semi-cylindrical barrels which are butted together; as shown in Figure 5 , each barrel is a hollow structure with a cylindrical shell 821, a first end plate 822 and a second end plate 823. The cylindrical shell 821 is arc-shaped with a central angle preferably less than 180°, so that the two barrels are not easy to interfere when butted together. The first end plate 822 and the second end plate 823 are respectively located at both ends of the cylindrical shell 821 and are fixedly connected, preferably in an integrated structure. The first end plate 822 and the flange plate 810 are both provided with mounting holes, and the first end plate 822 and the flange plate 810 are fixedly connected by connecting members such as bolts and screws. The side of the second end plate 823 facing the flange plate 810 is one component of the limiting surface 860. After the two barrels are butted together, the cylindrical floating cavity 850 is formed inside the cylindrical shell 821, the openings of the floating cavity 850 are surrounded by the inner sides of the two second end plates 823, and the sides of the two second end plates 823 facing the flange plate 810 constitute the limiting surface 860. The spring abuts against the first end plate 822, and the floating connecting body 831 partially extends into the spring, which can support and guide the deformation of the spring.

[0064] In this embodiment, the setting position of the movable chuck 400 can be positioned by the floating connector 831 cooperating with the connecting shell 820 or the flange plate 810, that is, when the end face of the floating connector 831 away from the chuck connector 833 is in contact with the connecting shell 820 or the flange plate 810, the movable chuck 400 cannot continue to move away from the fixed chuck 300. When the second end plate 823 blocks the floating path of the floating connector 831, the floating connector 831 cannot contact the flange plate 810 when pushed into the floating cavity 850, and only contacts the second end plate 823. At this time, the position where the floating connector 831 contacts the second end plate 823 is the setting position of the movable chuck 400. If the second end plate 823 avoids the floating path of the floating connector 831, the floating connector 831 cannot continue to move after being pushed into the floating cavity 850 and contacting the flange plate 810. At this time, the position where the floating connector 831 contacts the flange plate 810 is the setting position of the movable chuck 400.

[0065] The setting position of the movable chuck 400 can also be positioned 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 shell 820, the movable chuck 400 cannot continue to move away from the fixed chuck 300.

[0066] The first elastic element 910 exerts an elastic force on the movable chuck connector 830, which has a tendency to push the limiting table 832 into contact with the limiting face 860, that is, to maintain the movable chuck 400 in the sealing position. The inflation of the tire will exert a pushing force on the movable chuck 400, pushing the movable chuck 400 to move away from the fixed chuck 300. At this time, the first elastic element 910 is elastically deformed, and the movable chuck 400 moves away from the sealing position to the setting position until the movable chuck 400 reaches the setting position.

[0067] In use, the above inflation station is taken as an example:

[0068] After the vulcanization of the tire is completed, the tire is placed on the fixed chuck 300 by the tire unloading hand; the drive rod 510 is controlled to descend. During this process, the first elastic element 910 pushes the movable chuck connector 830 so that the limiting table 832 is in contact with the limiting face 860, and the movable chuck 400 is in the sealing position.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] The two pull rods 932 have a hinged end and a sliding end. The hinged end of the pull rod 932 is rotatably connected to the floating connecting body 831, and the sliding end is slidably connected to the first end plate 822 or the flange plate 810. In order to limit the movement path of the sliding end of the pull rod 932, a guide structure is arranged on the first end plate 822 or the flange plate 810, such as the limiting slot 933 shown in Figure 10 and 11 The guide structure can also be a guide rail or other conventional guide structure. It can be understood that the hinged end of the pull rod 932 can also be rotatably installed on the first end plate 822 or the flange plate 810, and a guide structure is arranged on the floating connecting body 831 to guide the movement of the sliding end of the pull rod 932.

[0079] Figures 9-11 The limiting slot 933 is arranged on the first end plate 822, and the limiting slot 933 extends radially. As shown in Figure 10 , an installation slot 824 is formed in the middle of the first end plate 822, and the limiting slot 933 is arranged on the side wall opposite to the installation slot 824; or as shown in Figure 11 , the limiting slot 933 is arranged on the abutting plane of the first end plate 822. The hinged end of the pull rod 932 is connected to the floating connecting body 831, and the sliding end is slidably connected to the limiting slot 933.

[0080] With the change of the included angle between the two pull rods 932, the floating connecting body 831 has an up and down floating amount. When the included angle between the two pull rods 932 is the smallest, the limiting table 832 of the floating connecting body 831 is in contact with the limiting surface 860, and at this time, the movable chuck 400 is in a sealing position; when the tire is inflated and exerts a force on the floating connecting body 831, the third elastic element 931 is elastically stretched, and the included angle between the two pull rods 932 is the largest, and the movable chuck 400 reaches a setting position.

[0081] In this embodiment, the limiting slot 933 can be used to position the setting position of the movable chuck 400, that is, when the included angle between the two pull rods 932 is the largest, the pull rod 932 is located at one end of the limiting slot 933, and the chuck connecting body 833 and the connecting housing 820 do not interfere. The floating connecting body 831 and the connecting housing 820 can also be used to position the setting position of the movable chuck 400, that is, the chuck connecting body 833 and the connecting housing 820 are used to limit the setting position of the movable chuck 400, and at this time, the length of the limiting slot 933 can be greater than or equal to the sliding stroke of the pull rod 932 in the limiting slot 933.

[0082] As shown in Figure 12The 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.

[0083] The first magnet 941 and the second magnet 942 are preferably electromagnets, which can control and change the magnitude of the magnetic force.

[0084] 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.

[0085] like Figure 13 The 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.

[0086] 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.

[0087] The vulcanizing machine using the above power-driven rear inflation device can be adjusted by adjusting the driving rod 510 and setting the first limit position and the second limit position to adapt to different sizes of tires; for tires with the same floating amount, only by controlling the driving rod, the production of different size tires can be realized, and the moving position of the movable clamp 400 has high precision, so it is not necessary to adjust the fixed clamp 300.

[0088] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

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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