Reciprocating lifting mechanism for upper die of forming machine

Abstract

The utility model relates to the technical field of forming machine accessories, and particularly discloses a forming machine upper die reciprocating lifting mechanism which comprises a rack, an upper die mounting frame and an ejector block. The top of the upper die mounting frame is connected with a connecting column, the top of the connecting column is rotationally connected with a lower positioning seat, the top of the lower positioning seat is connected with an upper positioning seat through a bolt, an eccentric wheel is arranged between the lower positioning seat and the upper positioning seat, and a center rod is fixedly connected to the eccentric position of the eccentric wheel and rotationally mounted on the rack; one side of the rack is rotationally connected with a positioning shaft, the first driven wheel is in transmission connection with the positioning shaft through a linkage piece, and the end, away from the rack, of the positioning shaft is connected with a shifting wheel; according to the utility model, the lifting of the upper die and the ejection of a formed part are simultaneously controlled by a set of driving system, the synchronism among actions is ensured, the energy consumption and the cost are reduced, and a plurality of structures are convenient to disassemble, so that the replacement of parts with corresponding sizes for use is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of molding machine accessories, in particular to a molding machine upper mold reciprocating lifting mechanism. Background Art

[0002] During the graphite carbon brush molding process, the reciprocating movement of the upper die (which may refer to the packing device or other components associated with the upper die) is key to achieving the pressing and holding pressure processes. This reciprocating movement is typically achieved through a hydraulic system or mechanical transmission system. When the upper die presses downward, it ensures that the graphite carbon brush is evenly compressed during the molding process, thereby achieving the desired molding effect.

[0003] In existing molding machines, especially graphite carbon brush molding machines, after powder feeding, downward pressure molding is required, followed by ejection of the molded part. The upper mold is driven and the ejection of the molded part is driven separately. Multiple drives need to be controlled separately, increasing costs. Furthermore, the need to install a corresponding drive at each position may increase the equipment's footprint, necessitating improvements. To address these issues, a reciprocating upper mold lifting mechanism for a molding machine is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a reciprocating lifting mechanism for an upper mold of a molding machine to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A reciprocating lifting mechanism for an upper die of a molding machine, comprising a frame, an upper die mounting frame and a top block;

[0007] The top of the upper mold mounting frame is connected to the connecting column, the top of the connecting column is rotatably connected to the lower positioning seat, the top of the lower positioning seat is connected to the upper positioning seat by bolts, an eccentric wheel is provided between the lower positioning seat and the upper positioning seat, the eccentric part of the eccentric wheel is fixedly connected to the center rod, and the center rod is rotatably mounted on the frame;

[0008] The end of the central rod is connected to the first driven wheel, one side of the frame is rotatably connected to the positioning shaft, the first driven wheel is connected to the positioning shaft through a linkage, and the end of the positioning shaft away from the frame is connected to the driving wheel;

[0009] The top block is rotatably connected to the top rod, the top rod is connected to a rotating shaft, the rotating shaft is movably connected to a shift rod at one end away from the top block, the shift wheel is movably connected to the shift rod at an eccentric position away from the positioning shaft, and one side of the frame is connected to a support shaft for limiting the movement of the shift rod.

[0010] In an optional solution: the shift lever is provided with a strip groove corresponding to the support shaft.

[0011] In an optional solution: a motor is installed on the top of the frame, an output shaft of the power output end of the motor is connected to a first driving wheel, and the first driving wheel is connected to a first driven wheel through a first synchronous belt transmission.

[0012] In an optional solution: the linkage member includes a second driving wheel and a second driven wheel, the second driving wheel is connected to one side of the first driven wheel, the second driving wheel is connected to the second driven wheel through a second synchronous belt transmission, and the second driven wheel is installed on the positioning shaft.

[0013] In an optional solution: the annular outer wall of the eccentric wheel is fixedly connected to a limiting ring, and the inner walls of the lower positioning seat and the upper positioning seat are both provided with arc grooves that cooperate with the limiting ring.

[0014] In an optional solution: the upper mold mounting frame is connected to the connecting column via bolts.

[0015] In an optional solution: a mounting hole is provided on the top block.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The mechanism of the utility model can be installed in a molding machine for use. When the first driven wheel is driven to rotate, the center rod can be driven to rotate, thereby driving the eccentric wheel to rotate around the axis of the center rod. The connecting column can be driven to rise and fall through the lower positioning seat, and the upper mold mounting frame can be raised and lowered. The upper mold mounting frame can be installed on the upper mold mounting frame, which can be used for pressing processing in graphite carbon brush molding. When the upper mold mounting frame is lifted and lowered, the linkage part drives the positioning shaft to rotate, and the toggle wheel rotates. Through the transmission of the toggle rod, the ejector rod can be driven to swing, and the ejector block can be driven to rise and fall, and the molded part can be ejected in cooperation with the ejector. The lifting and lowering of the upper mold and the ejection of the molded part are simultaneously controlled by a set of driving systems, thereby ensuring the synchronization between the various actions, reducing energy consumption and costs, and the multiple structures are easy to disassemble, which is conducive to replacing components of corresponding sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the present utility model.

[0019] Figure 2 It is a schematic diagram of the local structure of the utility model.

[0020] Figure 3 This is a schematic diagram of the partially split structure of the utility model.

[0021] In the figure: 11, frame; 12, upper mold mounting frame; 13, motor; 14, first driving wheel; 15, first driven wheel; 16, second driving wheel; 17, second driven wheel; 18, support shaft; 19, toggle wheel; 20, toggle lever; 21, strip groove; 22, ejector rod; 23, rotating shaft; 24, ejector block; 25, connecting column; 26, lower positioning seat; 27, eccentric wheel; 28, center rod; 29, upper positioning seat; 30, limit ring; 31, arc groove. DETAILED DESCRIPTION

[0022] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1-Figure 3 In this embodiment, a reciprocating lifting mechanism of an upper mold of a molding machine includes a frame 11, an upper mold mounting frame 12, and a top block 24; an ejector for ejecting a molded part can be mounted on the top block 24. In actual arrangement, the length of the ejector should be greater than the length of the graphite carbon brush molding cavity;

[0025] The top of the upper mold mounting frame 12 is connected to the connecting column 25. In actual use, a chamber or structure for guiding the connecting column 25 to rise and fall can be set in the molding machine. The top of the connecting column 25 is rotatably connected to the lower positioning seat 26. The top of the lower positioning seat 26 is connected to the upper positioning seat 29 by bolts. An eccentric wheel 27 is provided between the lower positioning seat 26 and the upper positioning seat 29. The eccentric portion of the eccentric wheel 27 is fixedly connected to the center rod 28. The center rod 28 is rotatably mounted on the frame 11.

[0026] The end of the center rod 28 is connected to the first driven wheel 15, and one side of the frame 11 is rotatably connected to the positioning shaft. The first driven wheel 15 is connected to the positioning shaft through a linkage, and the end of the positioning shaft away from the frame 11 is connected to the driving wheel 19;

[0027] The ejector block 24 is rotatably connected to the ejector rod 22, and the ejector rod 22 is connected to a rotating shaft 23. In actual use, the rotating shaft 23 can be rotatably installed in the molding machine. The rotating shaft 23 is movably connected to the lever 20 at one end away from the ejector block 24. The eccentric portion of the side of the toggle wheel 19 away from the positioning axis is movably connected to the lever 20. A support shaft 18 for limiting the movable position of the lever 20 is connected to one side of the frame 11.

[0028] In this embodiment, the mechanism can be installed in a molding machine for use. When the first driven wheel 15 is driven to rotate, the center rod 28 can be driven to rotate, thereby driving the eccentric wheel 27 to rotate around the axis of the center rod 28. The connecting column 25 can be driven to move up and down through the lower positioning seat 26, and the upper mold mounting frame 12 can be raised and lowered. The upper mold mounting frame 12 can be installed on the upper mold mounting frame 12, which can be used for pressing processing in graphite carbon brush molding;

[0029] When the upper mold mounting frame 12 is lifted or lowered, the linkage member drives the positioning shaft to rotate, and the toggle wheel 19 rotates. Through the transmission of the toggle rod 20, the ejector rod 22 can be driven to swing, and the ejector block 24 can be driven to lift or lower, and cooperate with the ejector to eject the molded part.

[0030] In another embodiment, the shift lever 20 is provided with a strip groove 21 corresponding to the support shaft 18; when the shift lever 20 moves up and down and swings with the shift wheel 19, the support shaft 18 moves in the strip groove 21, which can limit the shift lever 20, so that the shift lever 20 can move up and down and swing stably. The connection between the shift lever 20 and the push rod 22 can be a universal joint connection. When the shift lever 20 switches position with the shift wheel 19, it drives the push rod 22 to swing around the axis of the rotating shaft 23. In actual use, a chamber for guiding the up and down movement of the push block 24 is provided in the molding machine.

[0031] In another embodiment, a motor 13 is mounted on the top of the frame 11, and an output shaft of the power output end of the motor 13 is connected to a first drive wheel 14, and the first drive wheel 14 is connected to a first driven wheel 15 via a first synchronous belt transmission; the motor 13 is a driving component, and in actual use, a corresponding motor and reducer can be selected, or a motor and coupling can be selected as the motor 13;

[0032] The motor 13 drives the first driving wheel 14 to rotate, and through the rotation of the first synchronous belt, drives the first driven wheel 15 to rotate, thereby driving the center rod 28 to rotate.

[0033] In another embodiment, the linkage includes a second driving wheel 16 and a second driven wheel 17, the second driving wheel 16 is connected to one side of the first driven wheel 15, the second driving wheel 16 is connected to the second driven wheel 17 through a second synchronous belt transmission, and the second driven wheel 17 is installed on the positioning shaft; when the first driven wheel 15 rotates, it can drive the second driving wheel 16 to rotate, and through the rotation of the second synchronous belt, the second driven wheel 17 is driven to rotate, and the positioning shaft can drive the toggle wheel 19 to rotate.

[0034] In another embodiment, the annular outer wall of the eccentric wheel 27 is fixedly connected to the limiting ring 30, and the inner walls of the lower positioning seat 26 and the upper positioning seat 29 are both provided with an arc groove 31 that cooperates with the limiting ring 30; the size of the eccentric wheel 27 can be replaced.

[0035] In another embodiment, the upper mold mounting frame 12 is connected to the connecting column 25 via bolts; the connecting column 25 can be replaced to a target length for use.

[0036] In another embodiment, the top block 24 is provided with a mounting hole for mounting a ejector or other components.

[0037] The working principle of the utility model is as follows: the mechanism can be installed in a molding machine for use, the motor 13 drives the first driving wheel 14 to rotate, and the first driven wheel 15 is driven to rotate by the rotation of the first synchronous belt, thereby driving the center rod 28 to rotate, thereby driving the eccentric wheel 27 to rotate around the axis of the center rod 28, and the connecting column 25 can be driven to rise and fall by the lower positioning seat 26, and the upper mold mounting frame 12 can be raised and lowered. The upper mold mounting frame 12 can be installed on the upper mold mounting frame, which can be used for pressing processing in graphite carbon brush molding;

[0038] When the upper mold mounting frame 12 is raised or lowered, it can drive the second driving wheel 16 to rotate, and through the rotation of the second synchronous belt, it can drive the second driven wheel 17 to rotate. The positioning shaft can drive the shifting wheel 19 to rotate, and through the transmission of the shifting rod 20, it can drive the ejector rod 22 to swing, drive the ejector block 24 to rise and fall, and cooperate with the ejector to eject the molded part;

[0039] In actual use, the position of the upper mold reciprocating lifting mechanism is arranged according to the position of other mechanisms in the molding machine, and the size of each component is set according to actual needs. This application is only for reference in the drawings, and in the actual setting in this application, when the center rod 28 is connected to the top of one side of the eccentric wheel 27, the toggle rod 20 is connected to the bottom of one side of the toggle wheel 19, that is, when the upper mold mounting frame 12 drives the upper mold to rise, the top block 24 moves up and cooperates with the ejector to eject the molded part. After that, when the upper mold mounting frame 12 is lowered but not pressed, the top block 24 descends partially to make the ejector separate from the molding cavity. When the upper mold is performing pressing processing, the ejector is in a state of being separated from the molding cavity. Later, when the upper mold is away, the ejector can cooperate to eject the molded part. The ejector is not an improved structure of this application and is not actually drawn. In the actual setting, it can be set according to the mold in the molding machine, or it can be a hydraulic telescopic structure, installed on the top block 24 for use, and cooperate with the up and down movement of the top block 24 to reduce the space occupied by the structure.

[0040] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A reciprocating lifting mechanism for an upper mold of a molding machine, comprising a frame (11), an upper mold mounting frame (12) and a top block (24); Its characteristics are: The top of the upper mold mounting frame (12) is connected to a connecting column (25), the top of the connecting column (25) is rotatably connected to a lower positioning seat (26), the top of the lower positioning seat (26) is connected to an upper positioning seat (29) by bolts, an eccentric wheel (27) is provided between the lower positioning seat (26) and the upper positioning seat (29), the eccentric portion of the eccentric wheel (27) is fixedly connected to a center rod (28), and the center rod (28) is rotatably mounted on the frame (11); The end of the center rod (28) is connected to the first driven wheel (15), one side of the frame (11) is rotatably connected to the positioning shaft, the first driven wheel (15) is connected to the positioning shaft through a linkage, and the end of the positioning shaft away from the frame (11) is connected to the toggle wheel (19); The top block (24) is rotatably connected to the top rod (22), the top rod (22) is connected to a rotating shaft (23), the rotating shaft (23) is movably connected to the shifting rod (20) at one end away from the top block (24), the shifting wheel (19) is movably connected to the shifting rod (20) at an eccentric position away from the positioning axis, and a support shaft (18) for movably limiting the shifting rod (20) is connected to one side of the frame (11).

2. The reciprocating lifting mechanism for the upper mold of a molding machine according to claim 1, characterized in that: The shifting rod (20) is provided with a strip groove (21) corresponding to the supporting shaft (18).

3. The upper mold reciprocating lifting mechanism of a molding machine according to claim 1, characterized in that: A motor (13) is installed on the top of the frame (11); an output shaft of a power output end of the motor (13) is connected to a first driving wheel (14); and the first driving wheel (14) is connected to a first driven wheel (15) via a first synchronous belt transmission.

4. The reciprocating lifting mechanism for the upper mold of a molding machine according to claim 1, characterized in that: The linkage member comprises a second driving wheel (16) and a second driven wheel (17), wherein the second driving wheel (16) is connected to one side of the first driven wheel (15), the second driving wheel (16) is connected to the second driven wheel (17) through a second synchronous belt transmission, and the second driven wheel (17) is installed on the positioning shaft.

5. The upper mold reciprocating lifting mechanism of a molding machine according to claim 1, characterized in that: The annular outer wall of the eccentric wheel (27) is fixedly connected to the limiting ring (30), and the inner walls of the lower positioning seat (26) and the upper positioning seat (29) are both provided with an arc groove (31) that cooperates with the limiting ring (30).

6. The reciprocating lifting mechanism for the upper mold of a molding machine according to claim 1, characterized in that: The upper die mounting frame (12) is connected to the connecting column (25) via bolts.

7. The upper mold reciprocating lifting mechanism of a molding machine according to claim 1, characterized in that: The top block (24) is provided with a mounting hole.

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