Transmission device and compression molding equipment

Abstract

The utility model discloses a transmission device and compression molding equipment, and the transmission device comprises a lower transmission mechanism which comprises a main shaft and a torque limiter; the main shaft is provided with a first end and a second end which are oppositely arranged; the torque limiter is installed at the first end of the main shaft and used for being in transmission connection with the main rotating disc through a synchronous belt. The upper transmission mechanism comprises a mounting frame, a driving gear, a driven gear and a driven shaft; the driving gear and the driven gear are rotatably arranged on the mounting frame, the driven gear is meshed with the driving gear, and the driven shaft is connected with the driven gear and used for driving the rotary load to rotate; the supporting mechanism is connected with the main shaft in a sleeving mode and supports the mounting frame. According to the transmission device, the torque limiter is arranged between the main shaft and the main rotating disc, when the transmission device meets an emergency situation and the torque at the rear end is increased, the torque limiter is rapidly disengaged, so that parts at the rear end are protected, and the problem that in the prior art, a synchronous belt is prone to tooth skipping or breakage is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of compression molding equipment, in particular to a transmission device and compression molding equipment. Background Art

[0002] With the development of the economy, domestic large-scale beverage companies have a strong demand for high-speed, efficient, and highly stable molding production equipment production lines. The existing injection molding process has become increasingly mature. For products with complex shapes, thick walls, and large sizes, the injection molding process still has its own advantages. For products with simple shapes and thin walls, the advantages of the compression molding process are reflected. Through the rotating circulation method, multiple single-structure molds are arranged in a circle, and it is relatively simple to replace the mold in the later stage. Compared with injection molding, its operating temperature is lower, so the energy consumption is relatively lower, and there is no injection port, and the product size and appearance are better, so the application scenarios of the compression molding process are increasing.

[0003] For the multi-cavity compression molding process, since the molds are arranged on the circumference of the turntable and a single mold needs to be opened and closed, the specific process is: the main turntable rotates with multiple molds, and at a specific position, the molds are opened in sequence. At this time, the molds are unloaded from the molds in sequence through the second rotating device, and the molten plastic particles are loaded into the molds. When the above two items are completed at the same time, the molds need to be quickly closed while the turntable rotates. After the rapid closure, the upper and lower molds need to provide a large relative pressure to promote the rapid molding of the molded products in the molds and rapid cooling at the same time. In terms of the handover between the second rotating device and the main turntable for the finished products that have been compression molded and the plastic particles to be compression molded, it is necessary to ensure that the same linear speed is achieved at the intersection of the two tangent circles and that the subsequent continuous handover molds and products are synchronized. In order to ensure the debugging of the machine and facilitate the maintenance of the second rotating device, the second rotating device needs to establish two positions, one for the exchange area of ​​normal startup, at which the second rotating frame enters the opening and closing area of ​​the main rotating frame. Under abnormal circumstances, the two rotating devices may interfere in the exchange area, resulting in mechanical collision, and then the machine or mold parts are damaged or scrapped. The other position is the shutdown and maintenance area, and the two rotating frames do not interfere with each other. From the above description, it can be seen that the main turntable and the second rotating device are synchronized, and the second rotating device must have two fixed switching positions. The original transmission method of the main turntable and the second rotating device is gear transmission, which is stable and reliable. However, as the number of cavities increases, the diameter of the main turntable increases, and the distance between the two rotation centers increases. Therefore, the moment of inertia of the gear transmission becomes larger and larger. Later, the change to belt transmission relatively solved this problem, but the second rotating device is easy to cause the synchronous belt to jump teeth or break due to the integrated discharge and feeding functions. In this way, the synchronous belt has a shorter life during normal operation, and if special circumstances occur, the synchronous belt also needs to be replaced. Both lead to the need to replace the synchronous belt frequently. Summary of the invention

[0004] The first object of the present invention is to provide a transmission device to solve the problems raised by the background technology.

[0005] The second object of the utility model is to provide a compression molding device.

[0006] To achieve the first objective, the utility model provides a transmission device, which is applied to a compression molding device, wherein the compression molding device includes a main turntable and a rotating load, including:

[0007] The lower transmission mechanism comprises a main shaft and a torque limiter; the main shaft has a first end and a second end arranged opposite to each other; the torque limiter is installed at the first end of the main shaft, and the torque limiter is used for transmission connection with the main turntable through a synchronous belt;

[0008] An upper transmission mechanism, the upper transmission mechanism comprises a mounting frame, a driving gear, a driven gear and a driven shaft; the driving gear and the driven gear are rotatably arranged on the mounting frame, the driving gear is connected to the second end of the main shaft, the driven gear meshes with the driving gear, the driven shaft is connected to the driven gear, and the driven shaft is used to drive the rotating load to rotate;

[0009] A supporting mechanism is sleeved on the main shaft and supports the mounting frame.

[0010] As a preferred solution, the support mechanism includes a support sleeve and a support member; the support sleeve is sleeved on the outer periphery of the main shaft and rotatably cooperates with the main shaft; the support member is arranged between the support sleeve and the mounting frame.

[0011] As a preferred solution, a supporting convex ring is provided on the outer wall of the supporting sleeve.

[0012] As a preferred solution, the support member includes a lower mounting plate, an upper mounting plate and an adjusting nut; the lower mounting plate is fixedly arranged at the upper end of the supporting sleeve; the upper mounting plate is connected to the mounting frame; the adjusting nut is arranged between the upper mounting plate and the lower mounting plate, and is used to adjust the distance between the upper mounting plate and the lower mounting plate.

[0013] As a preferred solution, the support member further comprises a plane roller bearing, and the plane roller bearing is installed between the upper mounting plate and the mounting frame and sleeved on the main shaft.

[0014] As a preferred solution, the support sleeve is rotatably matched with the main shaft through a self-aligning ball bearing.

[0015] As a preferred solution, it further comprises a proximity switch, which is connected to the supporting mechanism and arranged opposite to the torque limiter, and is used to detect whether the torque limiter is disengaged.

[0016] To achieve the second purpose, the utility model also proposes a compression molding device, which includes a main turntable, a rotating load and the above-mentioned transmission device, wherein the main turntable is connected to the torque limiter through a synchronous belt; the rotating load is driven and connected to the driven shaft.

[0017] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0018] In the utility model, the transmission device is provided with a torque limiter between the main shaft and the main turntable. When the main turntable rotates, the torque of the main turntable is not directly transmitted to the main shaft, but is transmitted through the torque limiter. When the transmission device encounters an emergency and the rear end torque increases, the torque limiter is quickly disengaged, so that the rear end parts can be protected, solving the problem of the synchronous belt being prone to tooth jumping or breaking in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the transmission device in the utility model;

[0021] Figure 2 It is a schematic diagram of the utility model installed in the compression molding equipment;

[0022] Figure 3 yes Figure 2 A partial enlarged view of

[0023] Description of Figure Numbers:

[0024] 1. Lower transmission mechanism; 11. Main shaft; 12. Self-aligning ball bearing; 13. Torque limiter; 2. Upper transmission mechanism; 21. Mounting frame; 22. Driving gear; 23. Driven gear; 24. Driven shaft; 3. Support mechanism; 31. Support sleeve; 311. Support convex ring; 32. Support member; 321. Lower mounting plate; 322. Upper mounting plate; 323. Adjusting nut; 324. Plane roller bearing; 4. Proximity switch; 101. Synchronous belt; 102. Support step; 103. Rotating load. DETAILED DESCRIPTION

[0025] In order to facilitate a better understanding of the purpose, structure, features and efficacy of the utility model, the utility model is further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that the features shown in the figures are not necessarily drawn to scale. In addition, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. Based on the described embodiments of the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

[0026] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the usual meanings understood by persons with ordinary skills in the field to which the present disclosure belongs. The words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right", "front", "back" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. In addition, in the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0027] See also Figure 1-2 This embodiment provides a transmission device, which is applied to a compression molding device. The compression molding device includes a main rotating disk (not shown) and a rotating load 103, and the transmission device is used to transmit the power of the main rotating disk to the rotating load.

[0028] The transmission device includes a lower transmission mechanism 1, an upper transmission mechanism 2 and a support mechanism 3. The lower transmission mechanism 1 includes a main shaft 11 and a torque limiter 13; the main shaft 11 has a first end and a second end arranged oppositely; the torque limiter 13 is installed at the first end of the main shaft 11, and the torque limiter 13 is used to be connected to the main turntable through a synchronous belt 101. In this embodiment, the main shaft 11 is vertically arranged, and its first end is located below the second end. The upper transmission mechanism 2 includes a mounting frame 21, a driving gear 22, a driven gear 23 and a driven shaft 24; the driving gear 22 and the driven gear 23 are rotatably arranged on the mounting frame 21, the driving gear 22 is fixedly connected to the second end of the main shaft 11, the driven gear 23 is meshed with the driving gear 22, the driven shaft 24 is connected to the driven gear 23, and the driven shaft 24 is used to drive the rotating load to rotate; the support mechanism 3, the support mechanism 3 is sleeved on the main shaft 11 and supports the mounting frame 21.

[0029] When the compression molding equipment is operating normally, the torque limiter 13 is in a closed state. The main turntable rotates and drives the main shaft 11 and the driving gear 22 to rotate through the torque limiter 13; the driving gear 22 drives the driven gear 23 and the driven shaft 24 to rotate, and finally drives the rotating load to rotate. By setting the torque limiter 13 between the main shaft 11 and the main turntable, the torque of the main turntable is not directly transmitted to the main shaft 11, but is transmitted through the torque limiter 13. When the transmission device encounters an emergency and the rear end torque increases, the torque limiter 13 is quickly disengaged, so that the rear end parts can be protected, which solves the problem that the synchronous belt 101 of the compression molding equipment in the prior art is prone to tooth jumping or breaking.

[0030] See also Figure 1-2 In a preferred embodiment, the support mechanism 3 includes a support sleeve 31 and a support member 32. The support sleeve 31 is sleeved on the outer periphery of the main shaft 11 and rotates with the main shaft 11; the support member 32 is fixedly arranged between the support sleeve 31 and the mounting frame. A support convex ring 311 is arranged on the outer wall of the support sleeve 31. In the compression molding device, the support convex ring 311 can be used to cooperate with the support step 102 of the compression molding device to fix the position of the transmission device in the compression molding device. By using an independent support mechanism 3 to support the upper transmission device, the main shaft 11 only needs to transmit the torque transmitted by the synchronous belt 101, and does not need to bear the weight load of the upper transmission mechanism 2. Compared with the existing equipment, the shaft diameter of the main shaft 11 can be set smaller, and its rotational inertia is reduced. In this embodiment, the support sleeve 31 is rotated with the main shaft 11 through the self-aligning ball bearing 12, which can reduce the friction coefficient compared with the existing solution of using a tapered roller bearing to cooperate with the main shaft 11. At the same time, the self-aligning ball bearing 12 supports self-lubrication, does not need lubrication, and reduces maintenance costs. In addition, compared with the tapered roller bearing, the self-aligning ball bearing 12 has a lower requirement on the coaxiality of the bearing installation position of the second rotating device main shaft 11, thereby reducing the processing difficulty and production cost of the parts.

[0031] See also Figure 2-3In a preferred embodiment, the support member 32 includes a lower mounting plate 321, an upper mounting plate 322 and an adjusting nut 323. The lower mounting plate 321 is fixedly mounted on the upper end of the support sleeve 31; the upper mounting plate 322 is located above the lower mounting plate 321 and connected to the mounting frame 21; the adjusting nut 323 is arranged between the upper mounting plate 322 and the lower mounting plate 321, and is used to adjust the distance between the upper mounting plate 322 and the lower mounting plate 321, that is, to adjust the relative height of the upper mounting plate 322 and the lower mounting plate 321. The support member 32 also includes a plane roller bearing 324, which is installed between the upper mounting plate 322 and the mounting frame 21 and sleeved with the main shaft 11. The axial load brought by the rotation load is first transmitted to the mounting frame 21 through the driven shaft 24, and then transmitted to the lower mounting plate 321 through the plane roller bearing 324 and the adjusting screw, and finally carried by the support step 102 of the compression molding device.

[0032] See also Figure 2-3 In a preferred embodiment, the transmission device further comprises a proximity switch 4, which is connected to the support mechanism 3 and arranged opposite to the torque limiter 13, and is used to detect whether the torque limiter 13 is disengaged. In this embodiment, the proximity switch 4 is connected to the lower end of the support sleeve 31 and is located on one side of the torque limiter 13 in the horizontal direction.

[0033] The proximity switch 4 is electrically connected to the main machine of the compression molding equipment. Once the torque limiter is detected to be disengaged, the main machine executes the shutdown-related actions. The transmission structure can effectively solve the damage of parts caused by unexpected situations. And it can timely and correctly execute the shutdown steps according to the occurrence of unexpected situations, greatly improving the operating safety of the compression molding equipment.

[0034] like Figure 2 The utility model also provides a compression molding device, which includes a main turntable, a rotating load and the above-mentioned transmission device, wherein the main turntable is connected to the torque limiter 13 through a synchronous belt 101; the rotating load is connected to the driven shaft 24. When the compression molding device is operating normally, the main turntable rotates and drives the main shaft 11 and the driving gear 22 to rotate through the torque limiter 13; the driving gear 22 drives the driven gear 23 and the driven shaft 24 to rotate, and finally drives the rotating load to rotate. By arranging the torque limiter 13 between the main shaft 11 and the main turntable, the torque of the main turntable is not directly transmitted to the main shaft 11, but is transmitted through the torque limiter 13. When the transmission device encounters an emergency and the rear end torque increases, the torque limiter is quickly disengaged, so that the rear end parts can be protected, which solves the problem that the synchronous belt 101 is prone to tooth jumping or breaking in the prior art.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A transmission device, applied to a compression molding device, the compression molding device comprising a main turntable and a rotating load, characterized in that: include: A lower transmission mechanism, the lower transmission mechanism comprising a main shaft and a torque limiter; The main shaft has a first end and a second end disposed opposite to each other; The torque limiter is mounted on the first end of the main shaft, and the torque limiter is used for transmission connection with the main turntable through a synchronous belt; An upper transmission mechanism, the upper transmission mechanism comprising a mounting frame, a driving gear, a driven gear and a driven shaft; The driving gear and the driven gear are rotatably arranged on the mounting frame, the driving gear is connected to the second end of the main shaft, the driven gear meshes with the driving gear, the driven shaft is connected to the driven gear, and the driven shaft is used to drive the rotating load to rotate; A supporting mechanism is sleeved on the main shaft and supports the mounting frame.

2. A transmission device according to claim 1, characterized in that: The support mechanism comprises a support sleeve and a support member; the support sleeve is sleeved on the outer periphery of the main shaft and rotatably cooperates with the main shaft; the support member is arranged between the support sleeve and the mounting frame.

3. A transmission device according to claim 2, characterized in that: A supporting convex ring is arranged on the outer wall of the supporting sleeve.

4. A transmission device according to claim 2, characterized in that: The support member includes a lower mounting plate, an upper mounting plate and an adjusting nut; the lower mounting plate is fixedly arranged at the upper end of the supporting sleeve; the upper mounting plate is connected to the mounting frame; the adjusting nut is arranged between the upper mounting plate and the lower mounting plate, and is used to adjust the distance between the upper mounting plate and the lower mounting plate.

5. A transmission device according to claim 4, characterized in that: The support member further comprises a plane roller bearing, which is installed between the upper mounting plate and the mounting frame and sleeved with the main shaft.

6. A transmission device according to claim 2, characterized in that: The supporting sleeve is rotatably matched with the main shaft through a self-aligning ball bearing.

7. A transmission device according to claim 1, characterized in that: It also includes a proximity switch, which is connected to the support mechanism and arranged opposite to the torque limiter to detect whether the torque limiter is disengaged.

8. A compression molding device, characterized in that: The compression molding equipment includes a main turntable and a rotating load and a transmission device as described in any one of claims 1 to 7, wherein the main turntable is connected to the torque limiter via a synchronous belt; and the rotating load is drivingly connected to the driven shaft.

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