A lifting mold mechanism driven by an oil cylinder and synchronized by a gear

Abstract

The utility model discloses a kind of lifting mould mechanism of gear synchronization driven by oil cylinder, including a mounting frame, and upper mould mechanism is equipped on mounting frame, and the upper mould mechanism includes oil cylinder driving assembly arranged on mounting frame, upper seat lifting assembly arranged on the output end of oil cylinder driving assembly and upper synchronization component arranged on mounting frame, and the upper synchronization component is drivenly connected with upper seat lifting assembly by an upper gear component;The utility model improves equipment operation stability and production safety through upper mould mechanism;Through the lower die unit expansion equipment to the applicable range of complex mould, satisfy diversified production demand, further improve the reliability and production efficiency of equipment operation.

Description

Technical Field

[0001] This utility model relates to the technical field of lifting and hoisting mold devices, and specifically to a lifting and hoisting mold mechanism driven by a hydraulic cylinder and synchronized by gears. Background Technology

[0002] During rubber injection hot press molding, the upper mold plate is typically fixed to the upper hanging mold slot, and the lower mold plate is fixed to the lower heating plate of the molding machine. When opening the mold, the upper mold needs to separate from the nozzle, and it stops descending to a certain height. Conventional hanging mold slot designs only thicken the hanging mold rods, and the lifting and lowering of the hanging mold slot is not powered, relying solely on gravity and the main cylinder to drive the lifting and lowering movement. Because each hanging mold rod is independent, uneven load jamming often occurs during the lifting and lowering movement, which can easily damage the mold and affect production safety. At the same time, because this mechanism has no powered part, its applicable range is limited, and it may not be able to meet the production requirements of some complex molds. The lifting and lowering of the hanging mold slot lacks a synchronous mechanism, and during operation, due to the uneven force on each hanging mold rod, uneven load jamming often occurs during operation, affecting production and endangering the safety of operators. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a hydraulic cylinder-driven and gear-synchronized lifting mold mechanism. The hydraulic cylinder drive assembly provides active driving force to drive the upper lifting assembly. Combined with the upper synchronization assembly and the upper gear assembly, the keyless gears at both ends of the transmission shaft mesh with the racks of the first / third and second / fourth upper lifting mold rods, respectively, to achieve synchronous lifting of the four upper lifting mold rods through the rigid frame structure formed by the first / second upper lifting mold connecting rods and the upper lifting mold connecting plate. This solves the problem of uneven load jamming caused by the independent lifting mold rods and lack of lifting power, avoids the risk of mold damage, and improves the stability of equipment operation and production safety. Through the coordinated operation of the top mold hydraulic cylinder assembly, the middle seat lifting assembly, the middle synchronization assembly, and the middle gear assembly of the lower top mold unit, synchronous lifting is achieved by the meshing of the second keyless gears at both ends of the second transmission shaft with the upper racks of the lower top mold rods. This, in conjunction with the upper lifting mold mechanism, completes the precise opening and closing of the middle and upper plates of the mold, expanding the applicability of the equipment to complex molds, meeting diverse production needs, and further improving the reliability and production efficiency of the equipment.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A hydraulic cylinder-driven, gear-synchronized lifting mold mechanism includes a mounting frame for connecting the lifting mold mechanism to a rubber injection thermoforming machine. The mounting frame has an upper lifting mold mechanism for opening and closing the upper mold plate and the mold via a lifting action. The upper lifting mold mechanism includes a hydraulic cylinder drive assembly mounted on the mounting frame, an upper lifting assembly located at the output end of the hydraulic cylinder drive assembly, and an upper synchronization assembly mounted on the mounting frame. The upper synchronization assembly is connected to the upper lifting assembly via an upper gear assembly. The upper lifting assembly includes a first upper lifting mold rod passing through the mounting frame via an oil-free bearing, a second upper lifting mold rod passing through the mounting frame and connected to the first upper lifting mold rod via a first upper lifting mold connecting rod, a third upper lifting mold rod passing through the mounting frame on one side relative to the first and second upper lifting mold rods, and a fourth upper lifting mold rod passing through the mounting frame and connected to the third upper lifting mold rod via a second upper lifting mold connecting rod. The first upper lifting mold connecting rod... The rod and the second upper hanging mold connecting rod are connected by at least one upper hanging mold connecting plate; the upper synchronization assembly includes a drive shaft passing through the mounting frame, a bearing seat at each end of the drive shaft, and a deep groove ball bearing embedded in the bearing seat; the upper gear assembly includes a keyless gear at each end of the drive shaft through a drive shaft sleeve, a side cover at the end of the drive shaft, a gear protective cover on one side of the bearing seat, and an adjusting component on one side of the bearing seat; a first upper hanging mold strip is connected below the first upper hanging mold rod and the third upper hanging mold rod, and a second upper hanging mold strip is connected below the second upper hanging mold rod and the fourth upper hanging mold rod, and the first upper hanging mold strip and the second upper hanging mold strip are used to connect with the upper plate of the mold; the hydraulic cylinder drive assembly is used to drive the upper seat lifting assembly to lift and lower, the upper seat lifting assembly is used to drive the upper plate of the mold connected to the first upper hanging mold strip and the second upper hanging mold strip to lift and lower, and the upper synchronization assembly is used to make the first upper hanging mold rod, the second upper hanging mold rod, the third upper hanging mold rod and the fourth upper hanging mold rod lift and lower synchronously.

[0006] The keyless gears at both ends of the transmission shaft are respectively engaged with the spur racks on the first and third upper hanging mold rods.

[0007] The keyless gears at both ends of the transmission shaft are respectively engaged with the spur racks on the second and fourth upper hanging mold rods.

[0008] The hydraulic cylinder drive assembly includes an upper mold cylinder, an upper mold cylinder fixing block that mounts the upper mold cylinder on one side of the mounting frame, and a cylinder connecting shaft located at the output end of the upper mold cylinder.

[0009] It also includes a lower top mold unit, which is used to cooperate with the hydraulic cylinder driven and gear-synchronized lifting mold mechanism to open and close the middle plate and the upper plate of the mold. The lower top mold unit includes a top mold mounting base, a top mold hydraulic cylinder assembly on the top mold mounting base, a middle seat lifting assembly on the output end of the top mold hydraulic cylinder assembly, and a middle synchronization assembly on the top mold mounting base. The middle synchronization assembly and the middle seat lifting assembly are connected by a middle gear assembly. The top mold mounting base is used to connect the lower top mold unit to the rubber injection hot press molding machine. The top mold hydraulic cylinder assembly is used to drive the middle seat lifting assembly to lift and lower. The middle seat lifting assembly is used to drive the middle plate of the mold to lift and lower. The middle synchronization assembly is used to make the middle seat lifting assembly lift and lower synchronously.

[0010] The top mold cylinder assembly includes a top mold cylinder, a top mold cylinder mounting base on a top mold mounting seat, and a cylinder drive shaft located at the output end of the top mold cylinder.

[0011] The middle seat lifting assembly includes a first lower ejector rod that passes through the top mold mounting base via an oil-free bearing, a second lower ejector rod that passes through the top mold mounting base, a third lower ejector rod that passes through the top mold mounting base on one side relative to the first and second lower ejector rods, and a fourth lower ejector rod that passes through the top mold mounting base.

[0012] The intermediate synchronization component includes a second drive shaft, a second bearing housing at each end of the second drive shaft, and a second deep groove ball bearing embedded in the second bearing housing.

[0013] The gear assembly includes a second keyless gear at each end of the transmission shaft via a second transmission shaft sleeve, a second side cover at the end of the second transmission shaft, and a second gear protective cover on one side of the second bearing seat; the second keyless gears at both ends of the second transmission shaft are respectively meshed with the racks on the first and second lower ejector rods and / or the second keyless gears at both ends of the second transmission shaft are respectively meshed with the racks on the third and fourth lower ejector rods.

[0014] The top of the first lower ejector rod and the top of the third lower ejector rod are connected to a first lower ejector strip, and the top of the second lower ejector rod and the top of the fourth lower ejector rod are connected to a second lower ejector strip. The first lower ejector strip and the second lower ejector strip are used to connect to the middle plate of the mold.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. The upper lifting assembly is driven by the hydraulic cylinder drive assembly. Combined with the upper synchronization assembly and the upper gear assembly, the keyless gears at both ends of the transmission shaft mesh with the racks of the first / third and second / fourth upper lifting mold rods respectively. This enables the four upper lifting mold rods to lift synchronously through the rigid frame structure formed by the first / second upper lifting mold connecting rod and the upper lifting mold connecting plate. This avoids the risk of mold damage and improves the stability of equipment operation and production safety.

[0017] 2. Through the coordinated operation of the top mold cylinder assembly, middle seat lifting assembly, middle synchronization assembly, and middle gear assembly of the lower top mold unit, synchronous lifting is achieved by utilizing the meshing transmission between the second keyless gears at both ends of the second transmission shaft and the spur rack on the lower top mold rod. This, combined with the upper lifting mold mechanism, completes the precise opening and closing of the middle plate and the upper plate of the mold, expanding the applicability of the equipment to complex molds, meeting diverse production needs, and further improving the reliability and production efficiency of the equipment. Attached Figure Description

[0018] Figure 1 This is the front view of the upper lifting mold mechanism of this utility model.

[0019] Figure 2 This is a left view of the lifting mold mechanism of this utility model.

[0020] Figure 3 This is a rear view of the upper lifting mold mechanism of this utility model.

[0021] Figure 4 This is a right view of the upper lifting mold mechanism of this utility model.

[0022] Figure 5 This is a partial schematic diagram of the lifting mold mechanism of this utility model. Figure 1 .

[0023] Figure 6 This is a partial schematic diagram of the lifting mold mechanism of this utility model. Figure 2 .

[0024] Figure 7 This is the front view of the top mold unit of this utility model.

[0025] Figure 8 This is a left view of the top mold unit of this utility model.

[0026] Figure 9 This is a partial rear view of the top mold unit of this utility model.

[0027] Figure 10 This is a right view of the top mold unit of this utility model.

[0028] Explanation of icon numbers:

[0029] 1-Mounting bracket; 2-Lifting mold mechanism; 20-Hydraulic cylinder drive assembly; 200-Lifting mold cylinder; 201-Lifting mold cylinder fixing block; 202-Cylinder connecting shaft; 21-Upper seat lifting assembly; 210-First lifting mold rod; 211-First lifting mold connecting rod; 212-Second lifting mold rod; 213-Third lifting mold rod; 214-Second lifting mold connecting rod; 215-Fourth lifting mold rod; 216-Lifting mold connecting plate; 22-Upper synchronization assembly; 220-Drive shaft; 221-Bearing seat; 222-Deep groove ball bearing; 23-Upper gear assembly; 230-Drive shaft sleeve; 231-Keyless gear; 232-Side cover; 233-Gear protective cover; 234-Adjusting component; 24-First lifting mold strip; 240-First lifting mold groove; 25-Second lifting mold strip. 250-Second lifting mold slot, 3-Oil-free bearing, 4-Lower ejector unit, 40-Ejector mounting base, 41-Ejector cylinder assembly, 410-Ejector cylinder, 411-Ejector cylinder fixing seat, 412-Cylinder drive shaft, 42-Middle seat lifting assembly, 420-First lower ejector rod, 421-Second lower ejector rod, 422-Third lower ejector rod, 423-Fourth lower ejector rod, 43-Middle synchronization assembly, 430-Second transmission shaft, 431-Second bearing seat, 432-Second deep groove ball bearing, 44-Middle gear assembly, 440-Second transmission shaft sleeve, 441-Second keyless gear, 442-Second side cover, 443-Second gear protective cover, 45-First lower ejector strip, 450-First ejector connecting slot, 46-Second lower ejector strip, 460-Second ejector connecting slot. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings:

[0031] Example 1:

[0032] like Figure 1-6As shown, this utility model relates to a hydraulic cylinder-driven and gear-synchronized lifting mold mechanism, including a mounting frame 1 for connecting the lifting mold mechanism to a rubber injection hot press molding machine. The mounting frame 1 has an upper mold lifting mechanism 2, which is used to open and close the upper platen of the mold through a lifting action. The upper mold lifting mechanism 2 includes a hydraulic cylinder drive assembly 20 mounted on the mounting frame 1, an upper seat lifting assembly 21 located at the output end of the hydraulic cylinder drive assembly 20, and an upper synchronization assembly 22 mounted on the mounting frame 1. The upper synchronization assembly 22 is connected to the upper seat lifting assembly 21 via an upper gear assembly 23. The upper seat lifting assembly 21 includes a first upper mold lifting rod 210 that passes through the mounting frame 1 via an oil-free bearing 3, and a... The mounting frame 1 includes a second upper lifting mold rod 212 connected to the first upper lifting mold rod 210 via a first upper lifting mold connecting rod 211, a third upper lifting mold rod 213 passing through the mounting frame 1 on one side relative to the first upper lifting mold rod 210 and the second upper lifting mold rod 212, and a fourth upper lifting mold rod 215 passing through the mounting frame 1 and connected to the third upper lifting mold rod 213 via a second upper lifting mold connecting rod 214. The first upper lifting mold connecting rod 211 and the second upper lifting mold connecting rod 214 are connected by at least one upper lifting mold connecting plate 216. The upper synchronization assembly 22 includes a drive shaft 220 passing through the mounting frame 1, a bearing seat 221 at each end of the drive shaft 220, and a deep groove ball bearing 222 embedded in the bearing seat 221. The upper gear assembly 23 includes a keyless gear 231 at each end of the transmission shaft 220 via a transmission shaft sleeve 230, a side cover 232 at the end of the transmission shaft 220, a gear protective cover 233 on one side of the bearing seat 221, and an adjusting member 234 on one side of the bearing seat 221; a first upper lifting mold bar 24 is connected below the first upper lifting mold rod 210 and the third upper lifting mold rod 213, and a second upper lifting mold bar 25 is connected below the second upper lifting mold rod 212 and the fourth upper lifting mold rod 215. The first upper lifting mold bar 24 and the second upper lifting mold bar 25 are used to connect to the upper plate of the mold; the hydraulic cylinder drive assembly 20 is used to drive the upper seat lifting assembly 21 to lift and lower, and the upper seat lifting assembly 21 is used to drive the first upper lifting mold bar 24 and the second upper lifting mold bar. The upper plate of the mold connected to the 25 phases is raised and lowered. The upper synchronization component 22 is used to make the first upper mold rod 210, the second upper mold rod 212, the third upper mold rod 213 and the fourth upper mold rod 215 rise and fall synchronously. The keyless gears 231 at both ends of one drive shaft 220 are respectively connected to the racks on the first upper mold rod 210 and the third upper mold rod 213. The keyless gears 231 at both ends of the other drive shaft 220 are respectively connected to the racks on the second upper mold rod 212 and the fourth upper mold rod 215. The hydraulic cylinder drive component 20 includes an upper mold cylinder 200, an upper mold cylinder fixing block 201 on one side of the mounting frame 1, and a cylinder connecting shaft 202 located at the output end of the upper mold cylinder 200.

[0033] During assembly, firstly, based on the mounting frame 1, it is fixedly connected to the rubber injection hot press molding machine to ensure overall stability. Then, the upper mold lifting mechanism 2 is assembled on the mounting frame 1. The hydraulic cylinder drive assembly 20 has two sets. One set of upper mold lifting cylinders 200 is mounted on one side of the mounting frame 1 via an upper mold lifting cylinder fixing block 201. Its output end is equipped with a cylinder connecting shaft 202, which is mechanically connected to the first upper mold lifting connecting rod 211 via a limit nut to transmit power. The other set of upper mold lifting cylinders 200 is mounted on the other side of the mounting frame 1 via the upper mold lifting cylinder fixing block 201. Its output end is equipped with a cylinder connecting shaft 202. The connecting shaft 202 is mechanically connected to the second upper lifting mold connecting rod 214 via a limiting nut to transmit power. The upper seat lifting assembly 21 consists of four upper lifting mold rods passing through the mounting frame 1 and supported by oil-free bearings 3: a first upper lifting mold rod 210, a second upper lifting mold rod 212, a third upper lifting mold rod 213, and a fourth upper lifting mold rod 215. The first upper lifting mold rod 210 and the second upper lifting mold rod 212 are connected via a first upper lifting mold connecting rod 211, and the third upper lifting mold rod 213 and the fourth upper lifting mold rod 215 are connected via a second upper lifting mold connecting rod 214. The two sets of connecting rods are connected by... At least one upper lifting mold connecting plate 216 is fixedly connected to form a rigid frame structure; the first upper lifting mold rod 210 and the third upper lifting mold rod 213 are connected together to the lower part of the first upper lifting mold strip 24, which is provided with a first lifting mold groove 240 for connecting the upper plate of the mold; the second upper lifting mold rod 212 and the fourth upper lifting mold rod 215 are connected together to the lower part of the second upper lifting mold strip 25, which is provided with a second lifting mold groove 250 for connecting the upper plate of the mold; the two ends of the drive shaft 220 are embedded in the bearing seat 221 through deep groove ball bearings 222 to reduce rotational friction; the bearing seat 221... 21 is fixed on the mounting bracket 1, adjacent to each upper hanging mold rod, and equipped with a side cover 232, a gear protective cover 233 and an adjusting part 234 to protect the internal gears and adjust the clearance; keyless gears 231 are installed at both ends of the transmission shaft 220 through the transmission shaft sleeve 230 to form an upper gear assembly 23, wherein two gear assemblies 23 are respectively meshed with the spur racks on the first upper hanging mold rod 210 and the third upper hanging mold rod 213, and the other two gear assemblies 23 are respectively meshed with the spur racks on the second upper hanging mold rod 212 and the fourth upper hanging mold rod 215, forming a gear and rack transmission pair motion relationship.

[0034] Working principle: When the hydraulic cylinder drive assembly 20 is started, the hydraulic cylinders 200 on both sides of the upper lifting mold move synchronously. The hydraulic cylinder connecting shaft 202 at its output end applies a pushing or pulling force to the first upper lifting mold connecting rod 211 and the second upper lifting mold connecting rod 214 simultaneously through the limit nut, driving the upper seat lifting assembly 21 to move as a whole. At this time, the four upper lifting mold rods (first upper lifting mold rod 210, second upper lifting mold rod 212, third upper lifting mold rod 213, and fourth upper lifting mold rod 215) move synchronously along the guide hole on the mounting bracket 1 under the guidance of the oilless bearing 3. The first upper lifting mold rod 210 and the third upper lifting mold rod 213 are rigidly connected through the first upper lifting mold connecting rod 211, and the second upper lifting mold rod 212 and the fourth upper lifting mold rod 215 are rigidly connected through the second upper lifting mold connecting rod 214. The two sets of connecting rods are also rigidly connected laterally through at least one upper lifting mold connecting plate 216 to ensure that the four lifting mold rods remain parallel during the lifting process. When each upper lifting mold rod moves upward... During lifting, the first and second upper lifting mold bars 24 and 25 move upward, driving the upper mold plate to rise synchronously through their lifting grooves, thus separating from the lower mold. During this process, the keyless gears 231 in the two gear assemblies 23 mesh with the racks on the first and third upper lifting mold bars 210 and 213, respectively, while the keyless gears 231 in the other two gear assemblies 23 mesh with the racks on the second and fourth upper lifting mold bars 212 and 215, respectively. When one of the upper lifting mold bars moves, its rack drives the corresponding keyless gear 231 to rotate. The keyless gear 231 transmits the rotational motion synchronously to the keyless gear 231 on the other side through the transmission shaft 220. The transmission shaft 220 rotates in the bearing seat 221 through the deep groove ball bearing 222, thus synchronizing with the rack on the other side, ensuring that the lifting speed and displacement of the four upper lifting mold bars are completely consistent, and avoiding skewing or jamming caused by uneven force on one side.

[0035] Example 2:

[0036] like Figure 7-10As shown, a hydraulic cylinder-driven and gear-synchronized lifting mold mechanism further includes a lower top mold unit 4. This lower top mold unit 4 is used to cooperate with the hydraulic cylinder-driven and gear-synchronized lifting mold mechanism in Embodiment 1 to open and close the middle plate and upper plate of the mold. The lower top mold unit 4 includes a top mold mounting base 40, a top mold hydraulic cylinder assembly 41 mounted on the top mold mounting base 40, a middle seat lifting assembly 42 located at the output end of the top mold hydraulic cylinder assembly 41, and a middle synchronization assembly 43 mounted on the top mold mounting base 40. The middle synchronization assembly 43 is connected to the middle seat lifting assembly 42 via a middle gear assembly 44. The top mold mounting base 40 is used to connect the lower top mold unit 4 to the rubber... The system is connected to a hot press injection molding machine. The top mold cylinder assembly 41 drives the middle seat lifting assembly 42 to rise and fall. The middle seat lifting assembly 42 drives the middle plate of the mold to rise and fall. The middle synchronization assembly 43 enables the middle seat lifting assembly 42 to rise and fall synchronously. The top mold cylinder assembly 41 includes a top mold cylinder 410, a top mold cylinder fixing seat 411 mounted on a top mold mounting base 40, and a cylinder drive shaft 412 located at the output end of the top mold cylinder 410. The middle seat lifting assembly 42 includes a first lower ejector rod 420 passing through a lubricated bearing 3 on the top mold mounting base 40, a second lower ejector rod 421 passing through the top mold mounting base 40, and a relative... The first lower ejector rod 420 and the second lower ejector rod 421 are located on one side of the ejector rod 420 and pass through the ejector mounting base 40, and the fourth lower ejector rod 423 passes through the ejector mounting base 40; the intermediate synchronization assembly 43 includes a second drive shaft 430, a second bearing seat 431 at each end of the second drive shaft 430, and a second deep groove ball bearing 432 embedded in the second bearing seat 431; the intermediate gear assembly 44 includes a second keyless gear 441 at each end of the second drive shaft 430 via a second drive shaft sleeve 440, a second side cover 442 at the end of the second drive shaft 430, and a gear located on one side of the second bearing seat 431. The second gear protective cover 443; wherein the second keyless gears 441 at both ends of one second drive shaft 430 are respectively engaged with the spur racks on the first lower ejector rod 420 and the second lower ejector rod 421 and / or the second keyless gears 441 at both ends of another second drive shaft 430 are respectively engaged with the spur racks on the third lower ejector rod 422 and the fourth lower ejector rod 423; a first lower ejector strip 45 is connected to the top of the first lower ejector rod 420 and the third lower ejector rod 422, and a second lower ejector strip 46 is connected to the top of the second lower ejector rod 421 and the fourth lower ejector rod 423, and the first lower ejector strip 45 and the second lower ejector strip 46 are used to connect with the middle plate of the mold.

[0037] Specifically, the first lower ejector strip 45 is provided with a first ejector connecting groove 450 for connecting with the middle plate of the mold, and the second lower ejector strip 46 is provided with a second ejector connecting groove 460 for connecting with the middle plate of the mold. During assembly, the ejector mounting base 40 is first fixed with the rubber injection hot press molding machine. The ejector cylinder assembly 41 is provided with two sets, one of which is securely installed on the lower side of the mounting base through the ejector cylinder fixing seat 411. The cylinder drive shaft 412 at the output end of the cylinder is connected to the first... The lower ejector plate 45 is connected by bolts, and another set is securely installed on the other side of the mounting base via the ejector cylinder fixing seat 411. The cylinder drive shaft 412 at the cylinder output end is connected to the second lower ejector plate 46 by bolts. The middle seat lifting assembly 42 includes four lower ejector rods (the first lower ejector rod 420, the second lower ejector rod 421, the third lower ejector rod 422, and the fourth lower ejector rod 423) that pass through the ejector mounting base 40 and are supported by oilless bearings 3. The top mold rod achieves low-friction sliding support through the oilless bearing 3. Its top is laterally connected to the first lower mold strip 45 and the second lower mold strip 46 to form a lifting frame. The two lower mold strips are respectively provided with the first mold connecting groove 450 and the second mold connecting groove 460 for connection with the middle plate of the mold. The movement of the middle synchronization component 43 and the middle gear component 44 is synchronized. The two ends of the second transmission shaft 430 are rotatably supported by the second deep groove ball bearings 432 in the second bearing seat 431. The two ends of the shaft are fitted with the second keyless gears 441 and positioned by the second transmission shaft sleeve 440. The gear protective cover 443 and the second side cover 442 provide movement protection. There are four sets of second keyless gears 441. Two sets of second keyless gears 441 respectively mesh with the racks on the first lower mold rod 420 and the second lower mold rod 421. The other two sets of second keyless gears 441 also mesh with the racks on the third lower mold rod 422 and the fourth lower mold rod 423 respectively.

[0038] Working principle: When the top mold cylinder assembly 41 is started, the two sets of top mold cylinders 410 are securely installed on both sides of the bottom of the top mold mounting base 40 through the top mold cylinder fixing seat 411. The output cylinder drive shaft 412 is mechanically connected to the first lower mold strip 45 and the second lower mold strip 46 through bolts. When the two top mold cylinders 410 move synchronously, the cylinder drive shaft 412 applies a pushing or pulling force to the corresponding (first and second) lower mold strips, driving the middle seat lifting assembly 42 to move as a whole; the tops of the four lower mold rods are connected through... The first lower ejector strip 45 and the second lower ejector strip 46 are laterally connected to form the left and right lifting frames. The first lower ejector strip 45 and the second lower ejector strip 46 are respectively provided with a first ejector connecting groove 450 and a second ejector connecting groove 460 to connect to the middle plate of the mold. The ejector cylinder 410 drives the first and second lower ejector strips to drive the four lower ejector rods to move up and down synchronously along the guide hole of the mounting seat. During this process, the second drive shaft 430 of the middle synchronization component 43 is embedded in the second bearing seat 431 through the second deep groove ball bearing 432. The low-friction rotating support has a second bearing seat 431 fixed on the top mold mounting base 40 adjacent to each lower mold rod, and is equipped with a second side cover 442 and a second gear protective cover 443 to protect the gears; the middle gear assembly 44 installs second keyless gears 441 at both ends of the second transmission shaft 430 through the second transmission shaft sleeve 440, forming four sets of gear transmission pairs, of which two sets of second keyless gears 441 are respectively meshed with the spur racks on the first lower mold rod 420 and the second lower mold rod 421, and the other two sets are connected to the racks. The second keyless gear 441 is meshed with the racks on the third lower ejector rod 422 and the fourth lower ejector rod 423 respectively. When one of the lower ejector rods (first and third) moves, its rack drives the corresponding second keyless gear 441 to rotate. The second keyless gear 441 transmits the rotational motion synchronously to the second keyless gear 441 on the other side through the second transmission shaft 430, and then synchronizes the movement of the rack on the other side, ensuring that the lifting speed and displacement of the four (first to fourth) lower ejector rods are completely consistent.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model. Therefore, without departing from the design spirit of the present utility model, any equivalent changes or modifications made by those skilled in the art to the structure, features and principles of the present utility model should fall within the protection scope of the patent application of the present utility model.

Claims

1. A hydraulic cylinder-driven, gear-synchronized lifting mold mechanism, comprising a mounting frame for connecting the lifting mold mechanism to a rubber injection hot press molding machine, characterized in that: The mounting frame is equipped with an upper lifting mold mechanism, which is used to open and close the upper plate of the mold and the mold through a lifting action. The upper lifting mold mechanism includes a hydraulic cylinder drive assembly on the mounting frame, an upper seat lifting assembly at the output end of the hydraulic cylinder drive assembly, and an upper synchronization assembly on the mounting frame. The upper synchronization assembly is connected to the upper seat lifting assembly via an upper gear assembly. The upper seat lifting assembly includes a first upper lifting mold rod that passes through the mounting frame via an oil-free bearing, a second upper lifting mold rod that passes through the mounting frame and is connected to the first upper lifting mold rod via a first upper lifting mold connecting rod, a third upper lifting mold rod that passes through the mounting frame on one side relative to the first and second upper lifting mold rods, and a fourth upper lifting mold rod that passes through the mounting frame and is connected to the third upper lifting mold rod via a second upper lifting mold connecting rod. The first upper lifting mold connecting rod and the second upper lifting mold connecting rod are connected by at least one upper lifting mold connecting plate. The upper synchronization assembly includes a drive shaft passing through the mounting frame, a bearing housing at each end of the drive shaft, and a deep groove ball bearing embedded in the bearing housing; the upper gear assembly includes a keyless gear at each end of the drive shaft via a drive shaft sleeve, a side cover at the end of the drive shaft, a gear protective cover on one side of the bearing housing, and an adjustment component on one side of the bearing housing; a first upper lifting mold bar is connected below the first and third upper lifting mold rods, and a second upper lifting mold bar is connected below the second and fourth upper lifting mold rods, the first and second upper lifting mold bars being used to connect to the upper plate of the mold; the hydraulic cylinder drive assembly is used to drive the upper seat lifting assembly to lift and lower, the upper seat lifting assembly is used to drive the upper plate of the mold connected to the first and second upper lifting mold bars to lift and lower, and the upper synchronization assembly is used to make the first, second, third, and fourth upper lifting mold rods lift and lower synchronously.

2. The hydraulic cylinder-driven and gear-synchronized lifting and hoisting mechanism according to claim 1, characterized in that: The keyless gears at both ends of the transmission shaft are respectively engaged with the spur racks on the first and third upper hanging mold rods.

3. The hydraulic cylinder-driven and gear-synchronized lifting and hoisting mechanism according to claim 1, characterized in that: The keyless gears at both ends of the transmission shaft are respectively engaged with the spur racks on the second and fourth upper hanging mold rods.

4. The hydraulic cylinder-driven and gear-synchronized lifting and hoisting mechanism according to claim 1, characterized in that: The hydraulic cylinder drive assembly includes an upper mold cylinder, an upper mold cylinder fixing block that mounts the upper mold cylinder on one side of the mounting frame, and a cylinder connecting shaft located at the output end of the upper mold cylinder.

5. A hydraulic cylinder-driven, gear-synchronized lifting mold mechanism according to any one of claims 1-4, further comprising a lower ejector mold unit, the lower ejector mold unit being used to cooperate with the lifting mold mechanism to open and close the mold middle plate and the mold upper plate, characterized in that: The lower mold unit includes a mold mounting base, a mold cylinder assembly mounted on the mold mounting base, a middle seat lifting assembly located at the output end of the mold cylinder assembly, and a middle synchronization assembly mounted on the mold mounting base. The middle synchronization assembly and the middle seat lifting assembly are connected by a gear assembly. The mold mounting base is used to connect the lower mold unit to a rubber injection hot press molding machine. The mold cylinder assembly is used to drive the middle seat lifting assembly to move up and down. The middle seat lifting assembly is used to drive the mold plate to move up and down. The middle synchronization assembly is used to make the middle seat lifting assembly move up and down synchronously.

6. The hydraulic cylinder-driven and gear-synchronized lifting and hoisting mechanism according to claim 5, characterized in that: The top mold cylinder assembly includes a top mold cylinder, a top mold cylinder mounting base on a top mold mounting seat, and a cylinder drive shaft located at the output end of the top mold cylinder.

7. A hydraulic cylinder-driven, gear-synchronized lifting and hoisting mechanism for molds according to claim 6, characterized in that: The middle seat lifting assembly includes a first lower ejector rod that passes through the top mold mounting base via an oil-free bearing, a second lower ejector rod that passes through the top mold mounting base, a third lower ejector rod that passes through the top mold mounting base on one side relative to the first and second lower ejector rods, and a fourth lower ejector rod that passes through the top mold mounting base.

8. The hydraulic cylinder-driven and gear-synchronized lifting and hoisting mechanism according to claim 7, characterized in that: The intermediate synchronization component includes a second drive shaft, a second bearing housing at each end of the second drive shaft, and a second deep groove ball bearing embedded in the second bearing housing.

9. A hydraulic cylinder-driven, gear-synchronized lifting and hoisting mechanism for molds according to claim 8, characterized in that: The gear assembly includes a second keyless gear at each end of the transmission shaft via a second transmission shaft sleeve, a second side cover at the end of the second transmission shaft, and a second gear protective cover on one side of the second bearing seat; the second keyless gears at both ends of the second transmission shaft are respectively meshed with the racks on the first and second lower ejector rods and / or the second keyless gears at both ends of the second transmission shaft are respectively meshed with the racks on the third and fourth lower ejector rods.

10. A hydraulic cylinder-driven, gear-synchronized lifting and hoisting mechanism for molds according to claim 9, characterized in that: The top of the first lower ejector rod and the top of the third lower ejector rod are connected to a first lower ejector strip, and the top of the second lower ejector rod and the top of the fourth lower ejector rod are connected to a second lower ejector strip. The first lower ejector strip and the second lower ejector strip are used to connect to the middle plate of the mold.

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