Hot press and belt lifting mechanism thereof

Abstract

The utility model relates to a hot press and a belt lifting mechanism thereof. The belt lifting mechanism comprises a winding wheel, a belt and a pressing assembly. A locking groove extending in the radial direction is formed in the winding wheel, and the groove bottom of the locking groove is larger than a groove opening of the locking groove; one end of the belt is wound on the winding wheel, and the other end is connected with a to-be-lifted piece; the pressing assembly comprises a movable block movably arranged in the locking groove, the belt bypasses the movable block from the groove bottom of the locking groove, and the shape of the movable block is matched with that of the locking groove. When the belt provides lifting force, the belt applies outward force in the radial direction to the movable block so that the movable block can move outwards in the radial direction, meanwhile, due to the fact that the groove bottom of the locking groove is larger than the groove opening of the locking groove, the squeezing force between the movable block and the groove wall of the locking groove is larger when the movable block moves outwards in the radial direction, and finally the belt can be locked. And the belt is prevented from slipping on the winding wheel.

Description

Technical Field

[0001] This application relates to the field of hot press machinery manufacturing technology for printed circuit boards, and in particular to hot presses and their belt lifting mechanisms. Background Technology

[0002] Thermoforming is a crucial step in the printing circuit board (PCB) process. This step primarily involves using a hot press to press multiple layers of PCB material together under heated conditions to form the final PCB product. The hot press has a front door and a rear door. When the front and rear doors are closed, a sealed chamber is formed inside the hot press, where the multiple layers of PCB material are pressed and molded. The front door of the hot press is repeatedly opened and closed for loading and unloading materials.

[0003] In related technologies, the opening and closing mechanism of the front door includes a winding wheel and a belt wound on the winding wheel. One end of the belt is connected to the front door. When the winding wheel winds the belt, it can drive the front door to rise to open the sealed compartment. When the winding wheel releases the belt, it can drive the front door to fall and close the sealed compartment.

[0004] However, due to the belt not being properly pressed together, problems such as the belt slipping on the winding pulley or breaking can easily occur. Utility Model Content

[0005] Therefore, it is necessary to provide a hot press and its belt lifting mechanism to address the problem of belt slippage or breakage on the winding pulley.

[0006] A belt lifting mechanism, the belt lifting mechanism comprising:

[0007] A winding wheel, wherein the outer periphery of the winding wheel is provided with a locking groove that is recessed radially from the outside to the inside, and the bottom dimension of the locking groove is larger than the opening dimension of the locking groove;

[0008] The belt has one end wound around the winding wheel and the other end used to connect to the part to be lifted;

[0009] The clamping assembly includes a movable block movably disposed within the locking groove, the belt passing over the movable block from the bottom of the locking groove, the movable block engaging with the locking groove to lock the belt.

[0010] In one embodiment, the locking groove has two sidewalls spaced circumferentially along the winding wheel, at least one of the sidewalls being an inclined surface that slopes toward the movable block in a radially outward direction along the winding wheel.

[0011] In one embodiment, the clamping assembly further includes a fixing block, and the winding wheel has a radially extending groove, the groove opening size being greater than or equal to the groove bottom size;

[0012] The fixing block is fixed in the groove, and the fixing block and the inner wall of the groove together define the locking groove, and the inclined surface is located on the fixing block.

[0013] In one embodiment, the groove is a rectangular groove, and the movable block has a right-angled surface on the side away from the fixed block, the right-angled surface being used to mate with the inner wall of the rectangular groove.

[0014] In one embodiment, the surface of the fixing block away from the axis of the winding wheel is an arc surface.

[0015] In one embodiment, the radial dimension of the movable block is less than or equal to the depth of the locking groove.

[0016] In one embodiment, the movable block has a mating surface that engages with the inclined surface, and the inclined surface and / or the mating surface has a friction structure for increasing the friction between the movable block and the locking groove.

[0017] In one embodiment, the belt lifting mechanism includes a support base and a rotating shaft rotatably connected to the support base. At least one winding wheel is sleeved on the rotating shaft, and the winding wheel rotates synchronously with the rotating shaft.

[0018] In one embodiment, the two ends of the rotating shaft along the axial direction are respectively fitted with the winding wheels, the support seat further includes a bearing seat, the bearing seat has a support groove, the rotating shaft passes through the support groove and can rotate relative to the support groove, and the bearing seat is located between the two winding wheels.

[0019] A hot press includes a hot press chamber, a door, and a belt lifting mechanism. The door is located at one end of the hot press chamber, and the end of the belt away from the winding wheel is connected to the door. When the winding wheel winds the belt, the door opens, and when the winding wheel releases the belt, the door closes.

[0020] In the aforementioned hot press and its belt lifting mechanism, the movable block engages with the locking groove, and the movable block is movably positioned within the locking groove. Therefore, when the belt provides lifting force, the belt applies a radially outward force to the movable block, causing it to move radially outward. Simultaneously, because the bottom dimension of the locking groove is larger than the opening dimension, the further the movable block moves radially outward, the greater the clamping force between it and the groove wall. This ultimately locks the belt, preventing slippage on the winding pulley. Furthermore, locking the belt through the groove wall and the side wall of the movable block results in a larger force-bearing area for the belt, reducing the risk of belt breakage. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of the belt lifting mechanism from one perspective in one embodiment.

[0022] Figure 2 for Figure 1 A schematic diagram of the AA section.

[0023] Figure 3 for Figure 2 A schematic diagram of the structure at point B.

[0024] Figure 4 This is a schematic diagram of the winding wheel in one embodiment.

[0025] Figure 5 This is a schematic diagram of the belt lifting mechanism from another perspective in one embodiment.

[0026] Reference numerals: 10, press; 11, housing; 12, door; 100, winding wheel; 110, groove; 120, locking groove; 200, belt; 210, belt clamp; 300, clamping assembly; 310, moving block; 311, right angle surface; 312, mating surface; 320, fixing block; 321, arc surface; 322, inclined surface; 400, support base; 410, rotating shaft; 420, bearing housing; 430, motor. Detailed Implementation

[0027] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0028] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation of this application.

[0029] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0033] See Figures 1-4This application discloses a belt lifting mechanism in one embodiment. The belt lifting mechanism includes a winding wheel 100, a belt 200, and a clamping assembly 300. The outer periphery of the winding wheel 100 is provided with a locking groove 120 that is recessed radially from the outside to the inside. The bottom dimension of the locking groove 120 is larger than the opening dimension of the locking groove 120. One end of the belt 200 is wound around the winding wheel 100, and the other end is used to connect to the object to be lifted. The clamping assembly 300 includes a movable block 310 that is movably disposed in the locking groove 120. The belt 200 passes over the movable block 310 from the bottom of the locking groove 120. The movable block 310 cooperates with the locking groove 120 to lock the belt 200.

[0034] In this embodiment, the movable block 310 engages with the locking groove 120, and the movable block 310 is movably disposed within the locking groove 120. Therefore, when the belt 200 provides lifting force, the belt 200 applies a radially outward force to the movable block 310, causing the movable block 310 to move radially outward. Simultaneously, since the bottom dimension of the locking groove 120 is larger than the opening dimension, the more the movable block 310 moves radially outward, the greater the clamping force between it and the groove wall of the locking groove 120. Ultimately, this achieves locking of the belt 200, preventing the belt 200 from slipping on the winding pulley 100. Furthermore, by locking the belt 200 through the groove wall of the locking groove 120 and the side wall of the movable block 310, the force-bearing area of ​​the belt 200 is increased, reducing the risk of the belt 200 breaking.

[0035] Specifically, the dimension of the bottom of the locking groove 120 is greater than the dimension of the opening of the locking groove 120. This means that the dimension of the bottom of the locking groove 120 along the circumference of the winding wheel 100 is greater than the dimension of the opening of the locking groove 120 along the circumference of the winding wheel 100, or the dimension of the bottom of the locking groove 120 along the axial direction of the winding wheel 100 is greater than the dimension of the opening of the locking groove 120 along the axial direction of the winding wheel 100. Of course, it is also possible that the dimensions of the bottom of the locking groove 120 along both the axial and circumference of the winding wheel 100 are greater than the dimensions of the opening of the locking groove 120 along both the axial and circumference of the winding wheel 100.

[0036] In some embodiments, the locking groove 120 has two sidewalls spaced circumferentially along the winding wheel 100, at least one sidewall being an inclined surface 322 that slopes toward the movable block 310 in a radially outward direction along the winding wheel 100.

[0037] Specifically, one or both sidewalls may be inclined. The movable block 310 engages with the locking groove 120, thus the movable block 310 also has a mating surface 312 that engages with the inclined surface 322. When the belt 200 is used to provide lifting force, the movable block 310 can move upward along the inclined surface 322 to further increase the clamping force between the locking groove 120 and the movable block 310, thereby locking the belt 200.

[0038] Furthermore, the clamping assembly 300 also includes a fixing block 320. The winding wheel 100 has a radially extending groove 110. The groove opening size of the groove 110 is greater than or equal to the groove bottom size. The fixing block 320 is fixed in the groove 110. The fixing block 320 and the inner wall of the groove 110 together define the locking groove 120. The inclined surface 322 is located on the fixing block 320.

[0039] In this embodiment, because the bottom dimension of the locking groove 120 is larger than the opening dimension of the locking groove 120, the movable block 310 cannot be installed from the opening into the locking groove 120. Therefore, firstly, a radially extending groove 110 is formed on the winding wheel 100, and the opening of the groove 110 is greater than or equal to the bottom dimension of the groove 110. Then, the belt 200 is passed around the movable block 310. Finally, the fixed block 320 and the movable block 310 are simultaneously placed radially into the groove 110, and then the fixed block 320 is locked. This achieves the installation of the movable block 310, meaning that the movable block 310 is installed within the locking groove 120 defined by the fixed block 320 and the inner wall of the groove 110.

[0040] Wherein, the groove opening size of the groove 110 refers to the groove opening size along the axial direction or the groove opening size along the circumferential direction, and the groove bottom size of the groove 110 refers to the groove bottom size along the axial direction or the groove bottom size along the circumferential direction.

[0041] The movable block 310 can be fixed in the groove 110 by means of screws or welding.

[0042] Of course, a locking groove 120 can also be directly opened on the winding wheel 100, and the movable block 310 and the belt 200 can be inserted into the locking groove 120 along the axial direction.

[0043] Specifically, the groove 110 is a rectangular groove, and the movable block 310 has a right-angled surface 311 on the side away from the fixed block 320. The right-angled surface 311 is used to cooperate with the inner wall of the rectangular groove.

[0044] The groove 110 is a rectangular groove. The movable block 310 and the fixed block 320 each have a right-angled surface 311 on their opposite sides, so that the outer wall of the clamping assembly 300 fits into the rectangular groove, improving the structural stability of the clamping assembly 300. The movable block 310 abuts against the inner wall of the rectangular groove through the right-angled surface 311, further increasing the locking capability of the locking groove 120.

[0045] In some embodiments, the radial dimension of the movable block 310 is less than or equal to the groove depth of the locking groove 120.

[0046] After one end of the belt 200 is pressed into the locking groove 120 by the movable block 310, it is wound around the winding wheel 100 in multiple turns. Therefore, the belt 200 is wound around the outside of the locking groove 120, the movable block 310 is located inside the locking groove 120, and the radial dimension of the movable block 310 is less than or equal to the groove depth of the locking groove 120, in order to prevent the upper surface of the movable block 310 from protruding from the locking groove 120 and affecting the belt 200 outside the locking groove 120.

[0047] In some embodiments, the surface of the fixing block 320 away from the axis of the winding wheel 100 is an arc surface.

[0048] In this embodiment, the surface of the fixing block 320 away from the axis of the winding wheel 100 is an arc surface, which is used to adapt to the arc surface 321 of the winding wheel 100 so as to facilitate the winding of the belt 200.

[0049] In actual installation, firstly, the belt 200 is routed around the movable block 310. Then, the fixed block 320 and the movable block 310 are radially inserted into the groove 110, with a certain gap left between the fixed block 320 and the groove 110. Next, the fixed block 320 is pressed down and locked with bolts. The pressing and fixing of the fixed block 320 achieves a primary locking of the belt 200. When the belt 200 lifts the object to be lifted, it causes the movable block 310 to move slightly outward radially, increasing the pressure of the locking groove 120 on the movable block 310, thus achieving a secondary locking of the belt 200. In other words, after two locking maneuvers, slippage of the belt 200 can be effectively prevented.

[0050] Specifically, the movable block 310 has a mating surface 312 that mates with the inclined surface 322. The inclined surface 322 and / or the mating surface 312 have a friction structure, which is used to increase the friction between the movable block 310 and the locking groove 120.

[0051] The friction structure can be a wavy texture, an uneven surface, a diamond pattern, etc., as long as it can increase the friction between the movable block 310 and the locking groove 120. The friction structure can be on the inclined surface 322, or on the mating surface 312; alternatively, both the inclined surface 322 and the mating surface 312 can have friction structures.

[0052] Combination Figure 1 and Figure 5 In some embodiments, the belt lifting mechanism includes a support base 400 and a rotating shaft 410 rotatably connected to the support base 400. At least one winding wheel 100 is sleeved on the rotating shaft 410, and the winding wheel 100 rotates synchronously with the rotating shaft 410.

[0053] In this embodiment, a motor 430 is also provided on the support base 400. The motor 430 drives the rotating shaft 410 to rotate. When the rotating shaft 410 rotates, it drives at least one winding wheel 100 on it to rotate, thereby driving the object to be lifted or lowered through the belt 200. The synchronous rotation of the winding wheel 100 and the rotating shaft 410 can be achieved by the winding wheel 100 being connected to the rotating shaft 410 through a tightening sleeve, or by the rotating shaft 410 engaging with the winding wheel 100 through a keyway.

[0054] In some embodiments, the two ends of the rotating shaft 410 along the axial direction are respectively fitted with winding wheels 100, and the support base 400 further includes a bearing base 420. The bearing base 420 has a support groove, the rotating shaft 410 passes through the support groove and can rotate relative to the support groove, and the bearing base 420 is located between the two winding wheels 100.

[0055] In this embodiment, there are two winding wheels 100. The two winding wheels 100 are respectively connected to the two ends of the part to be lifted via belts 200 for lifting the part to be lifted. At the same time, the bearing seat 420 is disposed between the two winding wheels 100 to support the rotating shaft 410 and prevent the rotating shaft 410 from being bent and deformed due to the weight of the part to be lifted, which would eventually cause the belt 200 to derail.

[0056] One embodiment of this application provides a hot press 10, including a hot press chamber, a door 12, and a belt lifting mechanism. The door 12 is disposed at one end of the hot press chamber, and the end of the belt 200 away from the winding wheel 100 is connected to the door 12. When the winding wheel 100 winds the belt 200, the door 12 opens, and when the winding wheel 100 releases the belt 200, the door 12 closes.

[0057] In this embodiment, the component to be lifted is the door 12 of the hot press 10, specifically the front door or the rear door of the hot press 10. Taking the front door as an example, when the motor 430 drives the rotating shaft 410 to rotate, the rotating shaft 410 drives the two winding wheels 100 to rotate synchronously. When the two winding wheels 100 wind the belt 200, the belt 200 lifts the front door, thereby opening the front door, allowing materials to be loaded and unloaded into the hot press chamber. When the two winding wheels 100 release the belt 200, the belt 200 lowers the front door, thereby closing the front door, allowing materials to be pressed inside the hot press chamber.

[0058] Specifically, the motor 430 is located on the upper part of the hot press 10. Both ends of the rotating shaft 410 are rotatably connected to the support base 400 via rolling bearings, and the middle of the rotating shaft 410 is rotatably connected to the round hole of the bearing seat 420, thus achieving stable support for the rotating shaft 410. The support base 400 is bolted to the housing 11 of the hot press 10, and the front door is made of a flattened metal plate. The front door and the belt 200 are respectively fixed to the belt clamp 210 with bolts.

[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A belt lifting mechanism, characterized in that, The belt lifting mechanism includes: A winding wheel, wherein the outer periphery of the winding wheel is provided with a locking groove that is recessed radially from the outside to the inside, and the bottom dimension of the locking groove is larger than the opening dimension of the locking groove; The belt has one end wound around the winding wheel and the other end used to connect to the part to be lifted; The clamping assembly includes a movable block movably disposed within the locking groove, the belt passing over the movable block from the bottom of the locking groove, the movable block engaging with the locking groove to lock the belt.

2. The belt lifting mechanism according to claim 1, characterized in that, The locking groove has two sidewalls spaced apart circumferentially along the winding wheel, at least one of the sidewalls being an inclined surface that slopes toward the movable block in a radially outward direction along the winding wheel.

3. The belt lifting mechanism according to claim 2, characterized in that, The clamping assembly also includes a fixing block, and the winding wheel has a radially extending groove, the groove opening size being greater than or equal to the groove bottom size; The fixing block is fixed in the groove, and the fixing block and the inner wall of the groove together define the locking groove, and the inclined surface is located on the fixing block.

4. The belt lifting mechanism according to claim 3, characterized in that, The groove is a rectangular groove, and the movable block has a right-angled surface on the side away from the fixed block. The right-angled surface is used to mate with the inner wall of the rectangular groove.

5. The belt lifting mechanism according to claim 3, characterized in that, The surface of the fixing block away from the axis of the winding wheel is an arc surface.

6. The belt lifting mechanism according to claim 2, characterized in that, The radial dimension of the movable block is less than or equal to the depth of the locking groove.

7. The belt lifting mechanism according to claim 2, characterized in that, The movable block has a mating surface that engages with the inclined surface, and the inclined surface and / or the mating surface has a friction structure for increasing the friction between the movable block and the locking groove.

8. The belt lifting mechanism according to claim 1, characterized in that, The belt lifting mechanism includes a support base and a rotating shaft rotatably connected to the support base. At least one winding wheel is sleeved on the rotating shaft, and the winding wheel rotates synchronously with the rotating shaft.

9. The belt lifting mechanism according to claim 8, characterized in that, The two ends of the rotating shaft along the axial direction are respectively fitted with the winding wheels. The support seat also includes a bearing seat with a support groove. The rotating shaft passes through the support groove and can rotate relative to the support groove. The bearing seat is located between the two winding wheels.

10. A hot press, characterized in that, The device includes a hot press chamber, a door, and a belt lifting mechanism as described in any one of claims 1-9. The door is located at one end of the hot press chamber, and the end of the belt away from the winding wheel is connected to the door. When the winding wheel winds the belt, the door opens, and when the winding wheel releases the belt, the door closes.

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