Electric power driven mold adjusting and forcing mechanism and vulcanizing machine

Abstract

The utility model discloses a kind of electric power drive mode-adjusting force-increasing mechanism and curing press, belong to curing press technical field, including base, crossbeam, mould locking assembly, force-increasing assembly and mode-adjusting assembly, mould locking assembly is used to lock up mould and lower mould, force-increasing assembly is used to provide mould closing pressure, force-increasing assembly includes fixedly installed in the cylinder of base lower part, and hollow telescopic sleeve is equipped in oil cavity inside;Telescopic sleeve lower part is fixedly connected with connecting shaft sleeve;Mode-adjusting assembly is used to adjust the relative position of the upper end of lock sleeve pull rod and base, including the drive motor and speed reducer of installation in connecting plate one side, and the output shaft of speed reducer is equipped with driving pulley, lock sleeve pull rod lower part is equipped with external thread and is threadedly connected with driven pulley, and driven pulley upper end is rotatably connected with connecting shaft sleeve.The utility model breaks away from the restriction of traditional hydraulic cylinder stroke to mould height, mode-adjusting range is big, and it is strong in versatility, and compact structure, transmission precision is high, can satisfy the vulcanization production demand of diversified specification tire.

Description

Technical Field

[0001] This utility model belongs to the field of vulcanizing machine technology, and specifically relates to an electrically driven mold adjustment and force-applying mechanism and a vulcanizing machine. Background Technology

[0002] Tire vulcanizing machines are key pieces of equipment in the tire manufacturing industry. Their function is to heat and pressurize pre-formed green tires in a mold, causing a vulcanization reaction to obtain a final tire product with specific patterns, structures, and superior performance. A typical tire vulcanizing machine mainly consists of a frame, an upper vulcanizing chamber (upper mold), a lower vulcanizing chamber (lower mold), a force-applying mechanism, a mold-adjusting mechanism, a mold-locking mechanism, a central mechanism, a base, and a crossbeam. Among these, the coordinated work of the force-applying mechanism and the mold-adjusting mechanism is crucial for achieving precise control of mold closing, mold locking, and vulcanization pressure.

[0003] Currently, most tire vulcanizing machines widely used in the industry employ hydraulic cylinders for force application and mold adjustment. The mold adjustment and force application mechanism uses an integrated design of a tie rod and a pressure-adjusting cylinder. Oil is supplied to the cylinder through a common main oil pipe, driving the piston rod to extend until the splined protrusion at the upper end of the piston rod inserts into the groove at the lower end of the tie rod. Then, a locking device drives a swing linkage to rotate the connecting plate and tie rod by a certain angle, completing the mold locking action. Subsequently, continuous oil supply increases the cylinder pressure, achieving force application after the upper and lower molds are closed, meeting the pressure requirements for tire vulcanization. This structure can meet basic usage needs within the conventional mold height range (i.e., the total mold height is less than the maximum stroke of the cylinder piston rod). However, in practical applications, with the diversification of tire specifications (such as large engineering tires and special tires), the size of the mold (total height of the upper and lower molds) continues to increase, and its technical limitations gradually become apparent, specifically in the following two aspects: 1. When the total height of the mold is high, in order to ensure that the spline protrusion at the upper end of the piston rod of the pressure adjusting cylinder can effectively insert into the groove at the lower end of the tie rod (this is a prerequisite for mold locking and subsequent force application), the extension stroke of the cylinder piston rod during the mold locking stage is large. On the one hand, the cylinder body needs to be designed with a longer cylinder length, resulting in an increase in the overall size of the mechanism, which goes against the trend of compact design of vulcanizing machines; on the other hand, the increased cylinder stroke means an increase in the demand for single oil supply. In order to ensure the stability of the hydraulic system's oil supply and the continuity of pressure, a larger hydraulic oil tank is required, which not only increases the equipment manufacturing cost, but also occupies more production workshop space.

[0004] 2. The mold height adaptability of the existing hydraulic mold adjustment and force application mechanism depends on the maximum stroke of the pressure adjustment cylinder: when the overall height of the mold does not exceed the maximum stroke of the cylinder piston rod, mold locking and force application can be achieved by adjusting the initial stroke of the piston rod; however, when the overall height of the mold exceeds the maximum stroke of the cylinder piston rod, even if the piston rod is fully extended, the spline protrusion at its upper end cannot reach the groove position at the lower end of the pull rod, resulting in the failure of the mold locking action, and subsequent force application cannot be carried out, which greatly limits the versatility and applicability of the equipment. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide an electrically driven mold adjustment and force application mechanism and a vulcanizing machine. This solves the problem that the mold adjustment and force application mechanism of the existing vulcanizing machine relies on the pressure adjustment cylinder for driving, and the mold height it can adapt to is limited by the stroke of the cylinder piston rod. As a result, the vulcanizing machine can only adapt to molds within a limited height range and cannot meet the vulcanizing needs of diverse tire specifications, leading to poor versatility of the vulcanizing machine.

[0006] To achieve the above objectives, according to one aspect of the present invention, an electrically driven mold adjustment and force application mechanism is provided, comprising: The base is used to mount the lower mold; The crossbeam is used to install the upper formwork; A locking assembly for locking the upper and lower molds includes several locking head rods circumferentially arranged on a crossbeam, with the locking head rods rotatably connected to the crossbeam. The lower end of each locking head rod has a splined protrusion. A locking sleeve rod corresponding to the locking head rod is provided on the base. The upper end of the locking sleeve rod has a splined groove that mates with the splined protrusion, and one side of the splined groove has a light hole to accommodate the splined protrusion. At least one guide key is provided on the base, and a guide groove that clearance-fits the guide key is provided on the locking sleeve rod to restrict its rotation. A drive mechanism is also provided on the crossbeam to drive the locking head rods to rotate. After the splined protrusion passes through the splined groove and enters the light hole, the drive mechanism drives the locking head rods to rotate by a certain angle, thereby locking and unlocking the locking head rods and the locking sleeve rods. The force-applying assembly, used to provide mold closing pressure, includes a cylinder fixedly installed at the bottom of the base. The cylinder has an oil chamber inside, and a hollow telescopic sleeve is provided inside the oil chamber. The locking sleeve rod is clearance-fitted with the telescopic sleeve. A piston is fixedly installed on the telescopic sleeve and is located inside the oil chamber. One end of the oil chamber has an oil inlet pipe and the other end has an oil return pipe. A coupling sleeve is fixedly connected to the lower part of the telescopic sleeve, and adjacent coupling sleeves are connected by a connecting plate. The mold adjustment assembly is used to adjust the relative position between the upper end of the locking sleeve pull rod and the base to adapt to the mold height. It includes a drive motor and a reducer installed on one side of the connecting plate. The output shaft of the reducer is provided with a drive pulley. The lower part of the locking sleeve pull rod is provided with an external thread and is threadedly connected to a driven pulley. The drive pulley and the driven pulley are connected by a transmission belt. The upper end of the driven pulley is rotatably connected to the connecting shaft sleeve.

[0007] Furthermore, both the driving pulley and the driven pulley are synchronous pulleys, and the transmission belt is a synchronous belt.

[0008] Furthermore, tensioning pulleys for tensioning the transmission belt are provided on both sides of the driving pulley and between adjacent driven pulleys.

[0009] Furthermore, the external thread is a rectangular thread or a trapezoidal thread.

[0010] Furthermore, the drive mechanism includes a fixed plate fixedly installed on the top of the lock cylinder lever, with transmission connecting rods pivotally connected to the ends of the two fixed plates on the same side, and an electric cylinder pivotally connected to the upper part of the crossbeam. The piston rod end of the electric cylinder is pivotally connected to the transmission connecting rod, which is used to drive the transmission connecting rod to swing, thereby using the fixed plate to drive the lock cylinder lever to rotate, so as to realize the locking and unlocking of the lock cylinder lever and the lock sleeve lever.

[0011] According to another aspect of the present invention, a vulcanizing machine is provided, including a frame, a crossbeam, a base, an upper mold installed on the lower part of the crossbeam and a lower mold installed on the upper part of the base, and also including the aforementioned electrically driven mold adjustment and force application mechanism.

[0012] The beneficial effects of this utility model are: (1) The present invention integrates the force-adding component on the locking sleeve tie rod, making the force-adding mechanism more compact. Furthermore, the mold-adjusting component of the present invention is realized by belt drive, which is not limited by the existing hydraulic cylinder piston rod, thus expanding the range of mold adjustment and enhancing the versatility of the vulcanizing machine.

[0013] (2) Both the driving pulley and the driven pulley are synchronous pulleys, and the transmission belt is a synchronous belt, which avoids slippage between the pulley and the transmission belt when the mold adjustment assembly is working. Moreover, compared with chain drive, the synchronous belt has the characteristic of high transmission accuracy, which ensures the accuracy of mold adjustment.

[0014] (3) By setting tensioning pulleys on both sides of the driving pulley and between adjacent driven pulleys, the wrap angle between the transmission belt and the driving and driven pulleys is increased, ensuring the transmission effect between the transmission belt and the driving or driven pulleys.

[0015] (4) The external thread at the bottom of the locking sleeve rod is a rectangular thread or a trapezoidal thread, which enhances the connection strength between the driven pulley and the locking sleeve rod. Attached Figure Description

[0016] Figure 1 This is a front view of an electrically driven mold adjustment and force application mechanism according to this utility model.

[0017] Figure 2 yes Figure 1 Sectional view of AA.

[0018] Figure 3 yes Figure 1 View from direction B in the middle.

[0019] Figure 4 yes Figure 2 Enlarged view of point C.

[0020] Figure 5 This is a three-dimensional view of an electrically driven mold adjustment and force-adding mechanism according to this utility model.

[0021] In the diagram: 1. Base; 2. Crossbeam; 3. Mold adjustment assembly; 31. Drive motor; 32. Driving pulley; 33. Driven pulley; 34. Transmission belt; 35. Tensioner; 36. Connecting plate; 4. Force application assembly; 41. Cylinder; 42. Telescopic sleeve; 43. Piston; 44. Oil inlet pipe; 45. Oil return pipe; 46. Coupling sleeve; 47. External thread; 5. Mold locking assembly; 51. Fixing plate; 52. Transmission connecting rod; 53. Lock head pull rod; 54. Splined protrusion; 55. Lock sleeve pull rod; 56. Splined groove; 57. Smooth hole; 58. Guide key. Detailed Implementation

[0022] The following will be combined with the appendix Figures 1-5 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] like Figure 1 As shown, an electrically driven mold adjustment and force-applying mechanism includes a base 1, a crossbeam 2, a mold locking assembly 5, a force-applying assembly 4, and a mold adjustment assembly 3.

[0025] The base 1 is installed at the bottom of the frame to support the lower mold, and the crossbeam 2 is installed at the top of the frame to install the upper mold. It is driven by the mold opening and closing cylinder (not shown in the figure) to move vertically on the frame.

[0026] like Figure 2 As shown, the mold locking assembly 5 is used to lock the upper mold and the lower mold, including several locking head rods 53 arranged circumferentially on the crossbeam 2, and the locking head rods 53 are rotatably connected to the crossbeam 2. The lower end of the locking head rod 53 is provided with a spline protrusion 54; the base 1 is provided with a locking sleeve rod 55 corresponding to the locking head rod 53, the upper end of the locking sleeve rod 55 is provided with a spline groove 56 that cooperates with the spline protrusion 54, and one side of the spline groove 56 is provided with a light hole 57 to accommodate the spline protrusion 54; Figure 4 As shown, the base 1 has at least one guide key 58, and the locking sleeve rod 55 has a guide groove that fits with the guide key 58 to restrict the rotation of the locking sleeve rod 55, so that the locking sleeve rod 55 can only move axially; the crossbeam 2 is also provided with a drive mechanism for driving the lock head rod 53 to rotate. After the spline protrusion 54 passes through the spline groove 56 and enters the light hole 57, the drive mechanism drives the lock head rod 53 to rotate a certain angle, thereby realizing the locking and unlocking of the lock head rod 53 and the locking sleeve rod 55.

[0027] like Figure 4 As shown, the force-applying component 4 is used to provide mold closing pressure. It includes a cylinder 41 fixedly installed on the lower part of the base 1. The cylinder 41 has an oil chamber inside, and a hollow telescopic sleeve 42 is provided inside the oil chamber. The locking sleeve rod 55 is intermittently installed inside the telescopic sleeve 42. A piston 43 is fixedly installed on the telescopic sleeve 42. The piston 43 is located in the oil chamber. One end of the oil chamber has an oil inlet pipe 44, and the other end has an oil return pipe 45. A coupling sleeve 46 is fixedly connected to the lower part of the telescopic sleeve 42. Adjacent coupling sleeves 46 are connected by a connecting plate 36. The coupling sleeve 46 ensures that the locking sleeve rod 55 and the driven pulley 33 are not separated axially, and allows the locking sleeve rod 55 to move up and down relative to the driven pulley 33 when the driven pulley 33 rotates. That is, the locking sleeve rod 55 moves up and down relative to the force-applying component 4 or the base 1, thereby realizing the force application after mold closing and the release of the mold closing force when the mold opens.

[0028] In this design, the hollow telescopic sleeve 42 directly transmits the hydraulic pressure on the piston 43 to the driven pulley 33 and the locking sleeve rod 55, effectively avoiding energy loss and structural deformation that may be caused by transmitting the pressure through additional connecting rods or indirect structures, thereby improving the force transmission efficiency and system rigidity.

[0029] like Figures 3-5As shown, the mold adjustment assembly 3 is used to adjust the relative position between the upper end of the locking sleeve tie rod 55 and the base 1 to adapt to the mold height. It includes a drive motor 31 and a reducer installed on one side of the connecting plate 36. When the connecting sleeve 46 moves in the vertical direction, the connecting plate 36 moves accordingly. The vertical displacement of the connecting plate 36 further drives the drive motor 31 and the reducer installed on it to move as a whole. The output shaft of the reducer is provided with a drive pulley 32. The lower part of the locking sleeve tie rod 55 is provided with an external thread 47 and a driven pulley 33 is threadedly connected. The drive pulley 32 and the driven pulley 33 are connected by a transmission belt 34. The upper end of the driven pulley 33 is rotatably connected to the connecting sleeve 46.

[0030] In this solution, the driven pulley 33 is first rotated to drive the locking sleeve rod 55 to move up and down, and the extension length of the locking sleeve rod is pre-adjusted. Then, the telescopic sleeve is used to drive the driven pulley 33 and the locking sleeve rod 55 to make fine adjustments as a whole, which reduces the working stroke required by the telescopic sleeve 42, so that the telescopic sleeve 42 only needs to have a small stroke to meet the usage requirements.

[0031] like Figure 5 As shown, both the driving pulley 32 and the driven pulley 33 are synchronous pulleys, and the transmission belt 34 is a synchronous belt. This avoids slippage between the pulley and the transmission belt 34 when the mold adjustment assembly 3 is working. Moreover, compared with chain drive, the synchronous belt has the characteristic of high transmission accuracy, which ensures the accuracy of mold adjustment.

[0032] like Figure 3 As shown, tensioning pulleys 35 for tensioning the transmission belt 34 are provided on both sides of the driving pulley 32 and between the adjacent driven pulleys 33, which increases the wrap angle between the transmission belt 34 and the driving pulley 32 and the driven pulleys 33, ensuring the effectiveness and stability of the transmission.

[0033] like Figure 4 As shown, the external thread 47 adopts a rectangular thread or a trapezoidal thread. Because the pressure is large when the mold is closed and pressure is applied, the rectangular thread or trapezoidal thread is used to enhance the connection strength between the driven pulley 33 and the locking sleeve rod 55 in order to withstand the pressure when the mold is closed and pressure is applied.

[0034] like Figure 5 As shown, the drive mechanism includes a fixed plate 51 fixedly installed on the top of the lock cylinder lever 53. The ends of the two fixed plates 51 on the same side are pivotally connected to the transmission connecting rods 52. An electric cylinder is pivotally connected to the upper part of the crossbeam 2. The end of the piston 43 rod of the electric cylinder is pivotally connected to the transmission connecting rods 52 to drive the transmission connecting rods 52 to swing, thereby using the fixed plate 51 to drive the lock cylinder lever 53 to rotate, so as to realize the locking and unlocking of the lock cylinder lever 53 and the lock sleeve lever 55.

[0035] A vulcanizing machine includes a frame, a crossbeam 2, a base 1, an upper mold installed on the lower part of the crossbeam 2, and a lower mold installed on the upper part of the base 1. It also includes the aforementioned electrically driven mold adjustment and force application mechanism. The electrically driven mold adjustment and force application mechanism is used to adjust the height of the locking sleeve tie rod 55 and the force application component 4 according to the height of the mold, so as to ensure the force after the upper mold and the lower mold are closed, and meet the pressure conditions required for tire vulcanization.

[0036] Working principle: When mold adjustment is required, the drive motor 31 is started, which drives the drive pulley 32 to rotate via the reducer. The drive pulley 32 drives the driven pulley 33 to rotate via the transmission belt 34. Since the locking sleeve rod 55 and the telescopic sleeve 42 are in clearance fit, and the driven pulley 33 is threadedly connected to the locking sleeve rod 55, the upper end of the locking sleeve rod 55 is connected to the base 1 via the guide key 58, so that the locking sleeve rod 55 can only extend and retract axially and cannot rotate, until the locking sleeve rod 55 extends and retracts to the height required for mold closing.

[0037] After the mold adjustment is completed, the mold opening and closing cylinder drives the crossbeam 2 and the upper mold to move downward until the upper mold and the lower mold are closed. Then the drive mechanism drives the transmission connecting rod 52 to swing, and the fixed plate 51 drives the locking head pull rod 53 to rotate, so that the spline protrusion 54 and the spline groove 56 are misaligned, locking the locking head pull rod 53 and the locking sleeve pull rod 55.

[0038] During the pressurization stage, hydraulic oil enters the oil chamber above the piston 43 from the oil inlet pipe 44, pressurizing the piston 43 downward, driving the piston 43, telescopic sleeve 42 and driven pulley 33 to move downward, thereby driving the locking sleeve rod 55 to move downward, thus pressurizing the mold after mold closing.

[0039] The above content is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the scope defined by the structure of the utility model, they should all fall within the protection scope of this utility model.

Claims

1. An electrically driven mold adjustment and force application mechanism, comprising: The base is used to mount the lower mold; The crossbeam is used to install the upper mold. A locking assembly for locking the upper and lower molds includes several locking head rods circumferentially arranged on a crossbeam, with the locking head rods rotatably connected to the crossbeam. The lower end of each locking head rod has a splined protrusion. A locking sleeve rod corresponding to the locking head rod is provided on the base. The upper end of the locking sleeve rod has a splined groove that mates with the splined protrusion, and one side of the splined groove has a light hole to accommodate the splined protrusion. At least one guide key is provided on the base, and a guide groove that clearance-fits the guide key is provided on the locking sleeve rod to restrict its rotation. A drive mechanism is also provided on the crossbeam to drive the locking head rods to rotate. After the splined protrusion passes through the splined groove and enters the light hole, the drive mechanism drives the locking head rods to rotate by a certain angle, thereby locking and unlocking the locking head rods and the locking sleeve rods. The feature is that it further includes a force-applying component for providing mold-closing pressure. The force-applying component includes a cylinder fixedly installed at the lower part of the base. The cylinder has an oil chamber inside, and a hollow telescopic sleeve is provided inside the oil chamber. A locking sleeve rod is clearance-fitted with the telescopic sleeve. A piston is fixedly installed on the telescopic sleeve and is located inside the oil chamber. One end of the oil chamber has an oil inlet pipe, and the other end has an oil return pipe. A coupling sleeve is fixedly connected to the lower part of the telescopic sleeve, and adjacent coupling sleeves are connected by a connecting plate. The mold adjustment assembly is used to adjust the relative position between the upper end of the locking sleeve pull rod and the base to adapt to the mold height. It includes a drive motor and a reducer installed on one side of the connecting plate. The output shaft of the reducer is provided with a drive pulley. The lower part of the locking sleeve pull rod is provided with an external thread and is threadedly connected to a driven pulley. The drive pulley and the driven pulley are connected by a transmission belt. The upper end of the driven pulley is rotatably connected to the connecting shaft sleeve.

2. The electrically driven mold adjustment and force application mechanism according to claim 1, characterized in that, Both the driving pulley and the driven pulley are synchronous pulleys, and the transmission belt is a synchronous belt.

3. The electrically driven mold adjustment and force application mechanism according to claim 2, characterized in that, Tensioning pulleys for tensioning the transmission belt are provided on both sides of the driving pulley and between adjacent driven pulleys.

4. The electrically driven mold adjustment and force application mechanism according to claim 1, characterized in that, The external thread is a rectangular thread or a trapezoidal thread.

5. The electrically driven mold adjustment and force application mechanism according to claim 1, characterized in that, The drive mechanism includes a fixed plate fixedly installed on the top of the lock cylinder lever. The ends of the two fixed plates on the same side are pivotally connected to a transmission link. An electric cylinder is pivotally connected to the upper part of the crossbeam. The piston rod end of the electric cylinder is pivotally connected to the transmission link to drive the transmission link to swing, thereby using the fixed plate to drive the lock cylinder lever to rotate, so as to realize the locking and unlocking of the lock cylinder lever and the lock sleeve lever.

6. A vulcanizing machine, comprising a frame, a crossbeam, a base, an upper mold mounted on the lower part of the crossbeam, and a lower mold mounted on the upper part of the base, characterized in that, It also includes the electric drive adjustment and force-adding mechanism as described in any one of claims 1-5.

Images