A post-inflation device and curing press

Abstract

The application discloses a post-inflation device and a vulcanizing machine, and belongs to the technical field of tire vulcanizing equipment. The post-inflation device comprises a moving clamp plate, a fixed clamp plate and a post-inflation frame. Two end plates of the post-inflation frame are arranged in an upper-lower interval, and a partition plate is arranged between the two end plates. Two moving clamp plates are respectively arranged on the two end plates, and a moving clamp plate driving device is arranged on the end plate and used for driving the moving clamp plate to move. Two fixed clamp plates are respectively arranged on the upper side and the lower side of the partition plate. A fixed clamp plate adjusting device is arranged on the partition plate and comprises a regulating shaft, a transmission rod and a transmission cylinder. The regulating shaft is rotatably arranged on the partition plate, and the regulating shaft is provided with a first thread and a second thread. The rotation directions of the first thread and the second thread are opposite. The transmission rod and the transmission cylinder are respectively connected with the two fixed clamp plates. The transmission cylinder is in transmission through the third thread and the second thread. The transmission rod is in transmission through the fourth thread and the first thread. The rotating of the regulating shaft can simultaneously drive the two fixed clamp plates to synchronously approach or leave the partition plate, and the operation efficiency is high.

Description

Technical Field

[0001] This invention relates to the field of tire vulcanization equipment technology, specifically to a rear inflation device and a vulcanizing machine. Background Technology

[0002] The rear inflation unit is an important component of the tire vulcanizing machine, used to inflate, cool, and shape the vulcanized, high-temperature tires. Currently, most existing rear inflation units have a fixed clamping plate and a moving clamping plate. Driven by a drive mechanism, the moving clamping plate separates from or approaches the fixed clamping plate, enabling tire loading and unloading. During the inflation, cooling, and shaping process, the tire is held and positioned by the fixed and moving clamping plates, inflating and controlling the tire's expansion. The distance between the fixed and moving clamping plates directly affects the accuracy of the tire's dimensions and its physical properties.

[0003] The moving chuck is mostly driven by a hydraulic structure, requiring a hydraulic station and hydraulic pipelines, which occupies a large space and has high maintenance costs. In order to accommodate different tire sizes, when changing tire sizes, the rear inflation device usually needs to adjust the fixed chuck to control the distance between the moving chuck and the fixed chuck during tire inflation to meet production requirements. Existing fixed chucks are inconvenient to adjust. Hydraulic drive structures have low moving chuck accuracy due to the influence of hydraulic oil temperature and pressure fluctuations on the control precision of the cylinder. Controlling the moving chuck to meet the production of different tire sizes results in poor reliability. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a rear inflation device and a vulcanizing machine, which can quickly adjust the set distance between the fixed chuck and the moving chuck during tire inflation, to meet the production needs of tires of different specifications, and with high position control accuracy.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] This invention provides a rear-inflation device, including a moving clamp, a fixed clamp, and a rear-inflation frame. The rear-inflation frame has two end plates and a partition, with the two end plates spaced vertically apart and the partition located between the two end plates. There are two moving clamps and two fixed clamps, each mounted on one of the end plates facing the partition. Each end plate has a moving clamp drive device for driving the two moving clamps. The two fixed clamps are located on the upper and lower sides of the partition. The partition has a fixed clamp adjustment device, which includes an adjustment shaft and a transmission rod. The control shaft is rotatably mounted on the partition plate, and a transmission component is fixed on the outer wall of the control shaft for transmitting power to the drive assembly, thereby driving the control shaft to rotate. The control shaft is provided with a first thread and a second thread, the first thread and the second thread having opposite directions of rotation. The transmission rod and the transmission cylinder are respectively connected to the two fixed clamping plates. The transmission cylinder is provided with a third thread, the third thread engaging with the second thread for transmission. The transmission rod is provided with a fourth thread, the fourth thread engaging with the first thread for transmission. The rotation of the control shaft can simultaneously drive the transmission rod and the transmission cylinder to move axially, thereby causing the two fixed clamping plates to synchronously approach or move away from the partition plate.

[0007] In the aforementioned rear inflation device, the control shaft has a first inner hole, which is open at least on one end face of the control shaft; the first thread is disposed on the inner wall of the first inner hole, and the second thread is disposed on the outer wall of the control shaft.

[0008] The transmission cylinder has a second inner hole, and the third thread is disposed on the inner wall of the second inner hole;

[0009] The fourth thread is disposed on the outer wall of the end of the transmission rod away from the fixed clamp.

[0010] In the aforementioned post-inflation device, the control shaft has a first inner hole that penetrates both ends of the control shaft; the first thread and the second thread are located at the two ends of the first inner hole, respectively.

[0011] The third thread is provided on the outer wall of the transmission cylinder, and the transmission cylinder has a second inner hole, which opens on the end face of the transmission cylinder away from the fixed clamp.

[0012] The fourth thread is disposed on the outer wall of the end of the transmission rod away from the fixed clamp, and the transmission rod can extend into the second inner hole, with the transmission rod and the second inner hole having a clearance fit.

[0013] In the aforementioned post-inflation device, the first thread and the second thread are located on the inner wall of the first inner hole;

[0014] Alternatively, a first connecting sleeve and a second connecting sleeve are fixed inside the first inner hole, with the first connecting sleeve and the second connecting sleeve located at opposite ends of the first inner hole; the first thread is provided on the inner wall of the first connecting sleeve, and the second thread is provided on the inner wall of the second connecting sleeve.

[0015] In one of the above-mentioned rear inflation devices, a tire pushing device is also included, which is used to push the tire downward to disengage the tire from the moving clamp or the fixed clamp.

[0016] And / or, the transmission component is a gear, pulley, or sprocket;

[0017] And / or, the transmission rod, the transmission cylinder, and the fixed clamp are coaxial;

[0018] And / or, the first thread, the second thread, the third thread, and the fourth thread are all trapezoidal threads;

[0019] And / or, the drive assembly includes a motor mounted on the partition; the motor is connected to the control shaft via a drive shaft;

[0020] And / or, a housing is provided on the partition, the housing and the transmission component are located on the same side of the partition; the housing covers the outside of the transmission component and the drive assembly.

[0021] In the aforementioned rear inflation device, an upper guide rod and a lower guide rod are slidably provided on the partition plate, and both the upper guide rod and the lower guide rod can slide up and down relative to the partition plate; the upper end of the upper guide rod is fixedly connected to the fixed clamp located on the upper side of the partition plate, and the lower end of the lower guide rod is fixedly connected to the fixed clamp located on the lower side of the partition plate.

[0022] In one of the above-mentioned rear inflation devices, the motion chuck drive device includes a lifting drive element, a pressure-bearing guide rod, a translation drive element, and a limiting slider;

[0023] The lifting drive element is fixedly mounted on the end plate and can drive the moving clamp to move closer to or away from the fixed clamp.

[0024] One end of the pressure-bearing guide rod is fixedly connected to the moving clamp, and the other end extends freely toward the end plate and is slidably connected to the end plate.

[0025] The translation drive element is mounted on the end plate. Under the push and pull of the translation drive element, the limiting slider can avoid the vertical movement path of the pressure-bearing guide rod, or it can block the movement path of the pressure-bearing guide rod.

[0026] In the above-mentioned rear inflation device, a guide rail is fixedly provided on the end plate, and guide holes are provided at the positions of the guide rail and the end plate corresponding to the position of the pressure-bearing guide rod. The pressure-bearing guide rod is slidably disposed in the guide hole. The limiting slider is slidably disposed in the guide rail, and can slide to block the guide hole or avoid the guide hole.

[0027] In the above-mentioned rear inflation device, the guide rail is provided with a T-shaped groove, and the limiting slider is a T-shaped block;

[0028] And / or, a limiting block is fixedly provided inside the guide rail, and the limiting block and the limiting slider are respectively located on both sides of the guide hole;

[0029] And / or, the number of the pressure-bearing guide rods is two, the number of the limiting sliders is also two, and the translation drive element pushes the two limiting sliders simultaneously through the slider connecting plate;

[0030] And / or, a wear-resistant plate is provided between the limiting slider and the guide rail.

[0031] A vulcanizing machine includes the aforementioned post-inflation device.

[0032] The beneficial effects of this invention are as follows:

[0033] The rear inflation device utilizes a combination of adjusting shaft, transmission rod and transmission cylinder to simultaneously adjust the distance between two fixed clamps and partitions, meeting the needs of different tire specifications. It can adjust two positions at once, resulting in high operating efficiency.

[0034] The control shaft, transmission rod, and transmission cylinder are sequentially assembled. Whether the control shaft is assembled on the outside of the transmission rod or on the outside of the transmission cylinder and transmission rod, it satisfies the requirement of external drive components for the control shaft while also ensuring a compact structure, simple overall structure, and convenient maintenance. The mutually assembled structure allows the fixed chuck to have a larger adjustment range in the vertical direction, that is, the fixed chuck has a larger adjustment stroke, thus meeting the production needs of tires of different specifications.

[0035] The transmission rod and the control shaft, as well as the transmission cylinder and the control shaft, are connected by trapezoidal threads. During tire inflation, the threads of the control shaft, transmission rod, and transmission cylinder form a self-locking mechanism, which can counteract the force exerted on the fixed chuck by the tire inflation. The fixed chuck adjustment device has good load-bearing capacity and stable and reliable performance. At the same time, the pressure-bearing guide rod and the limit slider cooperate to counteract the force exerted on the moving chuck by the tire inflation, resulting in high positioning accuracy of the moving chuck. This can improve the dimensional accuracy and physical properties of the tire during cooling and shaping.

[0036] The fixed chuck adjustment device only operates when changing tire specifications, with low movement frequency, slow wear, and long service life; the power is provided by a motor, which is a servo motor, and closed-loop control ensures high positioning accuracy and reliable movement, which can not only improve the tire inflation and shaping quality of the vulcanizing machine, but also meet the requirements of green manufacturing.

[0037] The motion chuck drive device no longer uses hydraulic drive, but instead uses pneumatic cylinders, electric cylinders, etc., eliminating the risks associated with hydraulic oil; the lifting drive element only drives the motion chuck to rise and fall, and the pressure guide rod and the limit slider work together to lock the position of the moving chuck, resulting in high positional accuracy;

[0038] Tires produced by vulcanizing machines using this post-inflation device are of high quality, and the vulcanizing machines are energy-saving, environmentally friendly, and have a long service life. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the rear inflation device;

[0040] Figure 2 A cross-sectional view of the fixed clamp adjustment device in the first embodiment of the rear inflation device;

[0041] Figure 3 This is a cross-sectional view of the assembly structure of the moving chuck and the moving chuck drive device in the first embodiment of the rear inflation device.

[0042] Figure 4 In the first embodiment of the post-inflation device, Figure 1 A partial enlarged view of the motion chuck drive device;

[0043] Figure 5 This is a schematic diagram of the overall structure of the second embodiment of the rear inflation device;

[0044] Figure 6 A partial enlarged view of the fixed clamp and the fixed clamp adjustment device in the second embodiment of the rear inflation device;

[0045] Figure 7 This is a cross-sectional view of the fixed clamp adjustment device in the second embodiment of the rear inflation device.

[0046] In the picture:

[0047] 100 - Rear inflatable frame; 110 - End plate; 120 - Support column; 130 - Partition plate;

[0048] 200 - Exercise clamp disc; 210 - Exercise clamp disc base; 220 - Exercise clamp disc body;

[0049] 300-Motion chuck drive device; 310-Lifting drive element; 320-Translation drive element; 330-Limit fixing block; 340-Limit slider; 350-Wear-resistant plate; 360-Pressure-bearing guide rod; 370-Guide rail; 380-Slider connecting plate;

[0050] 400 - Fixed clamping plate; 410 - Fixed clamping plate body; 420 - Fixed clamping plate base;

[0051] 500-Fixed clamp adjustment device; 510-Motor; 520-Drive shaft; 530-Adjustment shaft; 531-First inner hole; 532-Transmission component; 533-First connecting sleeve; 534-Second connecting sleeve;

[0052] 540 - Transmission rod; 550 - Transmission cylinder; 551 - Second inner hole; 560 - Lower guide rod; 570 - Upper guide rod; 580 - Housing;

[0053] 600 - Tire pushing device; 610 - Push-pull element; 620 - Tire pushing block. Detailed Implementation

[0054] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0055] Please refer to Figures 1-7 The rear inflation device includes a moving clamp 200, a fixed clamp 400, and a rear inflation frame 100. The rear inflation frame 100 has two end plates 110 and a partition 130. The two end plates 110 are spaced apart vertically, and the partition 130 is located between the two end plates 110. The end plates 110 and the partition 130 are fixed and connected into a whole by multiple support columns 120, providing support for the installation of the moving clamp 200 and the fixed clamp 400. The end plates 110 and the partition 130 are not limited to... Figure 1-7 The plate-like structure in the frame can also be a frame structure composed of a suitable number of rods, as long as it can realize the installation and support of the moving clamp 200 and the fixed clamp 400. The number of support columns 120 can be two or more; the connection between the support columns 120 and the end plate 110 and the partition plate 130 can be achieved by welding, detachable connection, or other methods. Depending on the needs, other detection elements can also be installed on the rear inflation frame 100, such as sensors for detecting the position of the moving clamp 200 and the fixed clamp 400.

[0056] There are two moving clamps 200 and two fixed clamps 400. The two moving clamps 200 are respectively mounted on the two end plates 110 and are located on the side of the two end plates 110 facing the partition 130. The two fixed clamps 400 are located on the upper and lower sides of the partition 130, respectively. That is, an upper inflation station and a lower inflation station are respectively set in the space above and below the partition 130. The upper inflation station and the lower inflation station each have one moving clamp 200 and one fixed clamp 400. The fixed clamp 400 and the moving clamp 200 in the same station cooperate to achieve the clamping and positioning of the tire in this station.

[0057] A fixed clamp adjustment device 500 is provided on the partition plate 130, which can simultaneously adjust the vertical position of the fixed clamp 400 of the upper inflation station and the lower inflation station; when vulcanizing tires of different specifications, the height of the fixed clamp 400 can be adjusted by the fixed clamp adjustment device 500. Specifically, the fixed clamp adjustment device 500 includes an adjustment shaft 530, a transmission rod 540, and a transmission cylinder 550. The adjustment shaft 530 is rotatably mounted on the partition plate 130, and the transmission rod 540 and the transmission cylinder 550 are respectively connected to two fixed clamps 400. The adjustment shaft 530 is provided with a first thread and a second thread, which are used to connect and transmit power to the transmission rod 540 and the transmission cylinder 550 respectively. The first thread and the second thread have opposite directions of rotation. When the adjustment shaft 530 rotates, the transmission rod 540 and the transmission cylinder 550 move synchronously. The amount of movement is the same but the direction is opposite. That is, when the adjustment shaft 530 rotates, the transmission rod 540 and the transmission cylinder 550 move synchronously, thereby causing the two fixed clamps 400 to move synchronously closer to the partition plate 130 or synchronously away from the partition plate 130.

[0058] like Figure 1 , Figure 2 The diagram shows a first embodiment of the rear inflation device; wherein the control shaft 530 is a hollow structure with a first inner hole 531, which extends along the axial direction (or length direction) of the control shaft 530 and is open at least on one end face of the control shaft 530. A first thread is provided on the inner wall of the first inner hole 531, and a second thread is provided on the outer wall of the control shaft 530.

[0059] The transmission cylinder 550 is hollow inside and has a second inner hole 551. The second inner hole 551 extends axially along the transmission cylinder 550 and is open at one end. The other end of the transmission cylinder 550 is fixedly connected to the fixed clamping plate 400. Of course, the second inner hole 551 can also be open on both ends of the transmission cylinder 550 without affecting the connection between the transmission cylinder 550 and the fixed clamping plate 400. The transmission cylinder 550 is provided with a third thread, which is set on the inner sidewall of the second inner hole 551. One end of the adjusting shaft 530 extends into the second inner hole 551, and the second thread and the third thread are screwed together to realize the connection and transmission between the transmission cylinder 550 and the adjusting shaft 530.

[0060] One end of the transmission rod 540 extends into the first inner hole 531. The outer wall of the transmission rod 540 is provided with a fourth thread. The fourth thread cooperates with the first thread to realize the threaded connection and transmission between the transmission rod 540 and the control shaft 530. The other end of the transmission rod 540 is located outside the control shaft 530 and is fixedly connected to the fixed clamp 400.

[0061] Preferably, the first inner hole 531 passes through the upper and lower end faces of the control shaft 530, and the transmission rod 540 can extend into the transmission cylinder 550 through the first inner hole 531. This can increase the vertical movement of the transmission rod 540 to a certain extent and facilitate the control of the overall axial dimensions of the control shaft 530, the transmission rod 540, and the transmission cylinder 550.

[0062] Depending on the requirements, the transmission rod 540 can be connected to the fixed clamping plate 400 located on the upper side of the partition 130, and the transmission cylinder 550 can be connected to the fixed clamping plate 400 located on the lower side of the partition 130. Alternatively, the transmission cylinder 550 can be connected to the fixed clamping plate 400 located on the upper side of the partition 130, and the transmission rod 540 can be connected to the fixed clamping plate 400 located on the lower side of the partition 130. Since the adjustment assembly consisting of the control shaft 530, the transmission rod 540, and the transmission cylinder 550 needs to be connected to the fixed clamping plates 400 located on the upper and lower sides of the partition 130, a center hole is provided at the corresponding position of the partition 130 and the control shaft 530, and the center hole penetrates the partition 130. One or more of the transmission rod 540, the transmission cylinder 550, and the control shaft 530 can pass through the center hole as needed.

[0063] Taking the connection between the transmission rod 540 and the fixed clamp 400 located on the upper side of the partition plate 130, and the connection between the transmission cylinder 550 and the fixed clamp 400 located on the lower side of the partition plate 130 as an example, Figure 2 As shown, the control shaft 530 extends through the central hole to the upper and lower sides of the partition 130; the transmission cylinder 550 is sleeved on the outside of the control shaft 530 from bottom to top, and the third thread is screwed into and connected to the second thread; the transmission rod 540 extends from top to bottom into the first inner hole 531, and is screwed into and connected to the first thread through the fourth thread. It can be understood that the control shaft 530 can also be located entirely on the lower side of the partition 130, in which case the transmission rod 540 passes through the central hole from bottom to bottom and is screwed into and connected to the first thread; or, the control shaft 530 can also be located entirely on the upper side of the partition 130, in which case the transmission cylinder 550 passes through the central hole from bottom to top and is screwed into and connected to the second thread.

[0064] Please refer to Figures 5-7This is a second embodiment of the post-inflation device, differing from the first embodiment only in the transmission method of the control shaft 530, transmission rod 540, and transmission cylinder 550. Specifically, a first connecting sleeve 533 and a second connecting sleeve 534 are fixedly installed in the first inner hole 531 of the control shaft 530, with the first connecting sleeve 533 and the second connecting sleeve 534 located at opposite ends of the first inner hole 531. A first thread is provided on the inner wall of the first connecting sleeve 533, and the outer wall of the first connecting sleeve 533 is press-fitted with the first inner hole 531. A second thread is provided on the inner wall of the second connecting sleeve 534, and the outer wall of the second connecting sleeve 534 is press-fitted with the first inner hole 531. The transmission cylinder 550 extends into the first inner hole 531 from the end of the control shaft 530 with the second thread, and a third thread is provided on the outer wall of the transmission cylinder 550, engaging with the second thread for transmission. The transmission rod 540 extends into the first inner hole 531 from the end of the control shaft 530 with the first thread.

[0065] Understandably, the first connecting sleeve 533 and the second connecting sleeve 534 can also be fixed to the regulating shaft 530 by welding or other methods, allowing them to rotate synchronously. Alternatively, the first connecting sleeve 533 and the second connecting sleeve 534 can be integrated with the regulating shaft 530 into a single unit, forming an integral structure, with the first thread and the second thread directly machined onto the inner wall of the first inner hole 531. The design of the first connecting sleeve 533 and the second connecting sleeve 534 can achieve localized wear resistance, increased connection strength, and reduced material and manufacturing costs.

[0066] Preferably, the transmission rod 540 can extend into the second inner hole 551 of the transmission cylinder 550. The transmission rod 540 and the second inner hole 551 are clearance-fitted, which does not affect the lifting and lowering of the transmission rod 540 itself. The fourth thread on the outer wall of the transmission rod 540 is screwed into and connected to the first thread for transmission. Preferably, the outer diameter of the transmission cylinder 550 is adapted to the inner diameter of the second connecting sleeve 534, and preferably, the inner diameter of the second connecting sleeve 534 is larger than the inner diameter of the first connecting sleeve 533. This helps ensure the strength of the transmission cylinder 550 and results in a compact structure. Similarly, if the first connecting sleeve 533 and the second connecting sleeve 534 are integrally formed with the adjusting shaft 530, the first inner hole 531 can be set as a stepped hole with different diameters at both ends. The end connected to the transmission rod 540 has a smaller inner diameter, and the end connected to the transmission cylinder 550 has a larger inner diameter, creating conditions for the transmission rod 540 to extend into the second inner hole 551.

[0067] In the two embodiments described above, the transmission rod 540 and the transmission cylinder 550 are respectively connected to the first thread and the second thread of the control shaft 530. At the same time, the transmission rod 540 and the transmission cylinder 550 are respectively connected to two fixed clamping plates 400. When the control shaft 530 rotates, it is necessary to control the transmission rod 540 and the transmission cylinder 550 to move synchronously, moving the two fixed clamping plates 400 closer to or away from the partition plate 130. Therefore, the fixed clamping plates 400 also need to be used with a guide device to realize the conversion of the rotation of the control shaft 530 into the vertical movement of the transmission rod 540, the transmission cylinder 550, and the two fixed clamping plates 400.

[0068] For example, the guiding device includes an upper guide rod 570 and a lower guide rod 560; both the upper guide rod 570 and the lower guide rod 560 are slidably connected to the partition 130 and can be raised and lowered relative to the partition 130. The upper end of the upper guide rod 570 is fixedly connected to a fixed clamping plate seat 420 located on the upper side of the partition 130, and the lower end of the lower guide rod 560 is fixedly connected to a fixed clamping plate seat 420 located on the lower side of the partition 130. When the regulating shaft 530 rotates, the upper guide rod 570 and the lower guide rod 560 guide the vertical movement of the two fixed clamping plates 400, respectively, thus converting the rotation of the regulating shaft 530 into the vertical movement of the transmission rod 540, the transmission cylinder 550, and the two fixed clamping plates 400.

[0069] Furthermore, a limiting flange is provided at the upper end of the lower guide rod 560. The limiting flange is located on the upper side of the partition 130. The outer diameter of the limiting flange is larger than the diameter of the through hole on the partition 130, which can prevent the fixed clamp 400 located on the lower side of the partition 130 from falling off.

[0070] The transmission rod 540 and the regulating shaft 530, as well as the transmission cylinder 550 and the regulating shaft 530, are all connected by trapezoidal threads, providing good self-locking and centering. The transmission rod 540, transmission cylinder 550, and regulating shaft 530 are sequentially fitted from the outside in, resulting in a compact structure with a large adjustable stroke, expanding the applicability of the vulcanizing machine. The coaxial arrangement of the regulating shaft 530, transmission rod 540, and transmission cylinder 550 ensures good force transmission performance.

[0071] A transmission component 532 is provided on the outer wall of the control shaft 530 for connecting an external drive assembly to drive the control shaft 530 to rotate when needed. Preferably, the transmission component 532 is located at one end of the control shaft 530, and except for the part that mates with the transmission component 532, the other parts of the outer wall of the control shaft 530 are covered by a second thread. The second thread has a maximum axial length, achieving the maximum height adjustment of the fixed clamp 400 within a limited space. Exemplarily, the transmission component 532 is located at the upper end of the control shaft 530, above the partition 130.

[0072] Depending on actual needs, the transmission component 532 can be a gear, pulley, sprocket, etc. The transmission component 532 can be integrally machined with the control shaft 530, or it can be assembled as a single unit. For example, such as... Figure 2 As shown, the transmission component 532 is a gear, and the drive assembly includes a motor 510, which is mounted on the partition 130. The output shaft of the motor 510 is connected to a drive shaft 520, which is rotatably mounted on the partition 130. The drive shaft 520 has a drive gear integrally machined on it, which meshes with the transmission component 532 for transmission.

[0073] Furthermore, a housing 580 is provided on the partition 130, and the housing 580 and the transmission component 532 are located on the same side of the partition 130. The housing 580 covers the outside of the transmission component 532 and the drive assembly connected to it, not only providing protection but also providing support points for the rotational installation of the transmission shaft 520 and the control shaft 530. This is reflected in, for example... Figure 2 As shown, the control shaft 530 is supported by bearings at the partition 130 and the housing 580 respectively. Adaptively, the housing 580 needs to be provided with through holes for the transmission rod 540 or the transmission cylinder 550 to pass through. Preferably, the motor 510 and the housing 580 are located on the upper and lower sides of the partition 130 respectively, which simplifies the installation structure of the motor 510. The motor 510 is directly fixed on the partition 130. The partition 130 is provided with vertically extending mounting holes corresponding to the position of the output shaft of the motor 510. One end of the transmission shaft 520 is rotatably connected to the mounting hole through a bearing, that is, the mounting hole forms a support point for the transmission shaft 520; the other end of the transmission shaft 520 is supported at the housing 580 by a bearing, thereby stably mounting the transmission shaft 520 on the partition 130.

[0074] The fixed clamp 400 includes a fixed clamp seat 420 and a fixed clamp body 410. The fixed clamp body 410 is used to match and contact the tire to achieve clamping. The fixed clamp seat 420 connects and fixes the fixed clamp body 410 to the transmission cylinder 550 or the transmission rod 540. Preferably, the transmission rod 540, the transmission cylinder 550 and the fixed clamp 400 are coaxial, which provides good force stability.

[0075] The motion chuck 200 includes a motion chuck base 210 and a motion chuck body 220, which are connected as one unit and move synchronously. Each of the two end plates 110 is equipped with a motion chuck drive device 300, used to drive the motion chuck 200 corresponding to its position.

[0076] The motion chuck drive device 300 includes a lifting drive element 310 and a pressure-bearing guide rod 360. The lifting drive element 310 is fixedly mounted on the end plate 110 and can drive the motion chuck 200 to move closer to or away from the fixed chuck 400. During the movement of the motion chuck 200, the pressure-bearing guide rod 360 cooperates with the guide sleeve fixed on the end plate 110 for guidance. For example, the lifting drive element 310 can be a cylinder, with the cylinder body fixed on the end plate 110 and the cylinder rod connected to the motion chuck 200. One end of the pressure-bearing guide rod 360 is fixedly connected to the motion chuck seat 210, and the other end extends freely toward the end plate 110; the pressure-bearing guide rod 360 extends through the end plate 110 and is slidably connected to the end plate 110.

[0077] Furthermore, the motion chuck drive device 300 also includes a translation drive element 320 and a limiting slider 340. The translation drive element 320 is fixedly mounted on the end plate 110. Under the push and pull of the translation drive element 320, the limiting slider 340 can avoid the vertical movement path of the pressure guide rod 360, or it can block the movement path of the pressure guide rod 360. When the motion chuck 200 moves upward to separate from the fixed chuck 400, i.e., in the upper inflation position, the limiting slider 340 can prevent the upward movement of the pressure guide rod 360; and when the motion chuck 200 moves downward to separate from the fixed chuck 400, i.e., in the lower inflation position, the limiting slider 340 can prevent the downward movement of the pressure guide rod 360. The translation drive element 320 can be a cylinder, with the cylinder body fixed on the end plate 110 and the cylinder rod connected to the limiting slider 340.

[0078] During use, because the newly vulcanized tire is relatively soft, the distance between the moving clamp 200 and the fixed clamp 400 after clamping is shorter than the actual distance during tire shaping to ensure better sealing before inflation. During tire inflation, the moving clamp 200 will move away from the fixed clamp 400 under the tire expansion pressure. When the pressure-bearing guide rod 360 is blocked by the limiting slider 340 and cannot continue to retract, this is the actual distance between the moving clamp 200 and the fixed clamp 400 during tire shaping. For the moving clamp 200, the internal pressure of the tire is offset by the combination of the limiting slider 340 and the pressure-bearing guide rod 360. The distance between the moving clamp 200 and the fixed clamp 400 during tire shaping is controllable and has high control precision.

[0079] Preferably, a guide rail 370 is fixedly installed on the side of the end plate 110 away from the moving clamp 200, and a limiting slider 340 is slidably disposed within the guide rail 370; the guide rail 370 serves as a guide and limiter for the sliding of the limiting slider 340. Corresponding to the position of the pressure-bearing guide rod 360, the guide rail 370 and the end plate 110 are respectively provided with guide holes, and the pressure-bearing guide rod 360 is slidably disposed within the guide holes; when the pressure-bearing guide rod 360 moves up and down, its two ends can be located on the upper and lower sides of the limiting slider 340 respectively, or simultaneously on the same side of the limiting slider 340. The limiting slider 340 can slide to block or avoid the guide hole. When both ends of the pressure-bearing guide rod 360 are located on the same side of the limiting slider 340, the moving clamp 200 approaches and clamps the tire with the fixed clamp 400; the limiting slider 340 can slide to block the guide hole, and when the tire is inflated, the pressure-bearing guide rod 360 abuts against the limiting slider 340.

[0080] Preferably, the guide rail 370 is provided with a T-shaped groove, and the limiting slider 340 is a T-shaped block. The limiting slider 340 slides inside the guide rail 370. The guide rail 370 not only guides the translation of the limiting slider 340, but also limits the vertical movement of the limiting slider 340. A limiting fixing block 330 is also fixedly provided inside the guide rail 370. The limiting fixing block 330 and the limiting slider 340 are respectively located on both sides of the guide hole. When the limiting slider 340 moves to the path of the pressure-bearing guide rod 360, the limiting fixing block 330 positions and limits it.

[0081] There are two pressure-bearing guide rods 360, and correspondingly two guide rails 370 and two limiting sliders 340. One translation drive element 320 can be provided, which simultaneously pushes the two limiting sliders 340 through the slider connecting plate 380. During long-term use, the limiting sliders 340 and the guide rails 370 will experience wear. The guide rails 370 are equipped with wear-resistant plates 350 in the T-shaped grooves, and the wear-resistant plates 350 slide in contact with the limiting sliders 340.

[0082] A tire pushing device 600 is also installed on the moving chuck seat 210 of the moving chuck 200 of the upper inflation station and the fixed chuck seat 420 of the fixed chuck 400 of the lower inflation station. The tire pushing device 600 consists of a push-pull element 610 and a tire pushing block 620. The push-pull element 610 can push the tire pushing block 620 up and down. After inflation and shaping are completed, the tire pushing device 600 is used to push the tire downward so that the tire is disengaged from the moving chuck 200 or the fixed chuck 400.

[0083] When using the vulcanizing machine with the above-mentioned post-inflation device, before vulcanizing the tire, the height of the fixed clamps 400 at the upper and lower positions is adjusted according to the specifications of the tire to be vulcanized. The adjustment process is as follows: the motor 510 rotates, driving the transmission shaft 520 and the adjustment shaft 530 to rotate. Since the adjustment shaft 530 is connected and driven by the transmission rod 540 and the transmission cylinder 550 through threads, and the two thread pairs have the same lead and opposite rotation direction, both being self-locking trapezoidal threads, the fixed clamps 400 at the upper and lower positions will move in opposite directions at the same speed. That is, the fixed clamp 400 at the upper inflation position moves upward and the fixed clamp 400 at the lower inflation position moves downward.

[0084] After the tires are vulcanized, the tire removal operator places the tires on the fixed clamp 400.

[0085] After the tire is placed in position, in the upper inflation station, the lifting drive element 310 pushes the moving chuck 200 down. At this time, the upper end of the pressure guide rod 360 is lower than the lower end face of the limit slider 340 by a certain distance. This distance is the distance that the moving chuck 200 needs to move backward during the inflation process. In the lower inflation station, the lifting drive element 310 pushes the moving chuck 200 up. At this time, the lower end of the pressure guide rod 360 is higher than the upper end face of the limit slider 340 by a certain distance.

[0086] After the moving clamp 200 and fixed clamp 400 in the upper and lower inflation stations clamp and position the tire, the translation drive element 320 pushes the limiting slider 340 to move horizontally and enter the path of the pressure guide rod 360 moving up and down. The tire is inflated, and the air pressure inside the tire increases, pushing the moving clamp 200 backward until the pressure guide rod 360 contacts the limiting slider 340, and inflation continues. At this time, all inflation pressure is applied to the pressure guide rod 360, the transmission rod 540, and the transmission cylinder 550, thus completing the entire inflation process.

[0087] The lifting drive element 310, the translation drive element 320, and the push-pull element 610 can be not only the aforementioned cylinders, but also electric cylinders or a screw-nut combination, with the screw-nut combination powered by a motor, reducer, etc.

[0088] 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. A rear-inflation device, comprising a moving clamp (200), a fixed clamp (400), and a rear-inflation frame (100); the rear-inflation frame (100) is provided with two end plates (110) and a partition (130), the two end plates (110) being spaced apart vertically, and the partition (130) being located between the two end plates (110); the number of the moving clamp (200) and the fixed clamp (400) are both two, the two moving clamps (200) being respectively mounted on the two end plates (110) and located on the side of the end plates (110) facing the partition (130); each of the two end plates (110) is provided with a moving clamp driving device (300) for driving the two moving clamps (200) to move respectively; the two fixed clamps (400) are respectively located on the upper and lower sides of the partition (130); characterized in that, A fixed clamp adjustment device (500) is provided on the partition plate (130). The fixed clamp adjustment device (500) includes an adjustment shaft (530), a transmission rod (540), and a transmission cylinder (550). The adjustment shaft (530) is rotatably mounted on the partition plate (130). A transmission component (532) is fixed on the outer wall of the adjustment shaft (530) for transmitting and connecting the drive assembly to drive the adjustment shaft (530) to rotate. The adjustment shaft (530) is provided with a first thread and a second thread, and the first thread and the second thread have opposite directions of rotation. The transmission rod (540) and the transmission cylinder (550) are respectively connected to the two fixed clamps (400). The transmission cylinder (550) is provided with a third thread, which engages with the second thread for transmission. The transmission rod (540) is provided with a fourth thread, which engages with the first thread for transmission. The rotation of the control shaft (530) can simultaneously drive the transmission rod (540) and the transmission cylinder (550) to move axially, thereby causing the two fixed clamps (400) to move closer to or further away from the partition (130) synchronously. The control shaft (530) has a first inner hole (531), which is open at least on one end face of the control shaft (530); the first thread is provided on the inner wall of the first inner hole (531), and the second thread is provided on the outer wall of the control shaft (530); The transmission cylinder (550) has a second inner hole (551), which is open on one end face of the transmission cylinder (550) away from the fixed chuck (400), and the third thread is provided on the inner wall of the second inner hole (551). The fourth thread is disposed on the outer wall of the transmission rod (540) at the end away from the fixed clamp (400).

2. A rear-inflation device, comprising a moving clamp (200), a fixed clamp (400), and a rear-inflation frame (100); the rear-inflation frame (100) is provided with two end plates (110) and a partition (130), the two end plates (110) being spaced apart vertically, and the partition (130) being located between the two end plates (110); the number of the moving clamp (200) and the fixed clamp (400) are both two, the two moving clamps (200) being respectively mounted on the two end plates (110) and located on the side of the end plates (110) facing the partition (130); each of the two end plates (110) is provided with a moving clamp driving device (300) for driving the two moving clamps (200) to move respectively; the two fixed clamps (400) are respectively located on the upper and lower sides of the partition (130); characterized in that, A fixed clamp adjustment device (500) is provided on the partition plate (130). The fixed clamp adjustment device (500) includes an adjustment shaft (530), a transmission rod (540), and a transmission cylinder (550). The adjustment shaft (530) is rotatably mounted on the partition plate (130). A transmission component (532) is fixed on the outer wall of the adjustment shaft (530) for transmitting and connecting the drive assembly to drive the adjustment shaft (530) to rotate. The adjustment shaft (530) is provided with a first thread and a second thread, and the first thread and the second thread have opposite directions of rotation. The transmission rod (540) and the transmission cylinder (550) are respectively connected to the two fixed clamps (400). The transmission cylinder (550) is provided with a third thread, which engages with the second thread for transmission. The transmission rod (540) is provided with a fourth thread, which engages with the first thread for transmission. The rotation of the control shaft (530) can simultaneously drive the transmission rod (540) and the transmission cylinder (550) to move axially, thereby causing the two fixed clamps (400) to move closer to or further away from the partition (130) synchronously. The control shaft (530) has a first inner hole (531) that penetrates both ends of the control shaft (530); the first thread and the second thread are located at the two ends of the first inner hole (531), respectively. The third thread is provided on the outer wall of the transmission cylinder (550), and the transmission cylinder (550) has a second inner hole (551), which opens on the end face of the transmission cylinder (550) away from the fixed chuck (400). The fourth thread is disposed on the outer wall of the transmission rod (540) at the end away from the fixed chuck (400). The transmission rod (540) can extend into the second inner hole (551), and the transmission rod (540) is clearance-fitted with the second inner hole (551).

3. The rear inflation device according to claim 2, characterized in that, A first connecting sleeve (533) and a second connecting sleeve (534) are fixed inside the first inner hole (531). The first connecting sleeve (533) and the second connecting sleeve (534) are integrated with the adjustment shaft (530). The first thread and the second thread are located on the inner wall of the first inner hole (531). Alternatively, a first connecting sleeve (533) and a second connecting sleeve (534) are fixed inside the first inner hole (531), with the first connecting sleeve (533) and the second connecting sleeve (534) located at both ends of the first inner hole (531); the first thread is provided on the inner wall of the first connecting sleeve (533), and the second thread is provided on the inner wall of the second connecting sleeve (534).

4. A post-inflation device according to claim 1 or 2, characterized in that, It also includes a tire pusher (600) for pushing the tire downward to disengage the tire from the moving chuck (200) or the fixed chuck (400). And / or, the transmission component (532) is a gear, pulley, or sprocket; And / or, the transmission rod (540), the transmission cylinder (550), and the fixed clamp (400) are coaxial; And / or, the first thread, the second thread, the third thread, and the fourth thread are all trapezoidal threads; And / or, the drive assembly includes a motor (510) mounted on the partition (130); the motor (510) is connected to the control shaft (530) via a drive shaft (520); And / or, a housing (580) is provided on the partition (130), the housing (580) and the transmission component (532) are located on the same side of the partition (130); the housing (580) covers the outside of the transmission component (532) and the drive assembly.

5. A rear-inflation device according to claim 1 or 2, characterized in that, An upper guide rod (570) and a lower guide rod (560) are slidably provided on the partition (130). Both the upper guide rod (570) and the lower guide rod (560) can slide up and down relative to the partition (130). The upper end of the upper guide rod (570) is fixedly connected to the fixed clamping plate (400) located on the upper side of the partition (130), and the lower end of the lower guide rod (560) is fixedly connected to the fixed clamping plate (400) located on the lower side of the partition (130).

6. A rear-inflation device according to claim 1 or 2, characterized in that, The motion chuck drive device (300) includes a lifting drive element (310), a pressure-bearing guide rod (360), a translation drive element (320), and a limiting slider (340). The lifting drive element (310) is fixedly installed on the end plate (110) and can drive the moving chuck (200) to move closer to or away from the fixed chuck (400). One end of the pressure-bearing guide rod (360) is fixedly connected to the moving clamp (200), and the other end extends freely toward the end plate (110) and is slidably connected to the end plate (110); The translation drive element (320) is mounted on the end plate (110). Under the push and pull of the translation drive element (320), the limiting slider (340) can avoid the up and down movement path of the pressure guide rod (360) or block the movement path of the pressure guide rod (360).

7. A rear-inflation device according to claim 6, characterized in that, A guide rail (370) is fixedly provided on the end plate (110). Guide holes are provided at the positions of the guide rail (370) and the end plate (110) corresponding to the position of the pressure-bearing guide rod (360). The pressure-bearing guide rod (360) is slidably disposed in the guide hole. The limiting slider (340) is slidably disposed in the guide rail (370) and can slide to block or avoid the guide hole.

8. A rear-inflation device according to claim 7, characterized in that, The guide rail (370) is provided with a T-shaped groove, and the limiting slider (340) is a T-shaped block; And / or, a limiting fixing block (330) is fixedly provided inside the guide rail (370), and the limiting fixing block (330) and the limiting slider (340) are respectively located on both sides of the guide hole; And / or, the number of the pressure-bearing guide rods (360) is two, the number of the limiting sliders (340) is also two, and the translation drive element (320) pushes the two limiting sliders (340) simultaneously through the slider connecting plate (380). And / or, a wear-resistant plate (350) is provided between the limiting slider (340) and the guide rail (370).

9. A vulcanizing machine, characterized in that, Includes the post-inflation device as described in claim 1 or 2.

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