Cam up-and-down automatic adjusting mechanism and rotary press

Abstract

The utility model discloses a cam up-down automatic adjusting mechanism and a rotary press, which comprise a cam mounting seat, a worm mounting seat, a pressure adjusting worm, a cam driving device, an eccentric shaft, a cam, an eccentric shaft gear, a bearing component and the like. An output shaft of the cam driving device penetrates through one side of the worm mounting base, is in transmission connection with one end of the worm rotating shaft and can drive the pressure adjusting worm to rotate, the two ends of the eccentric shaft are rotationally arranged on the cam mounting base in a penetrating mode, and the eccentric shaft is fixedly sleeved with the cam through a bearing assembly; the cam is located in a bottom groove of the cam installation base and extends out of the cam installation base, the eccentric shaft gear is fixedly connected with one end of the eccentric shaft, and the tooth position of the eccentric shaft gear is meshed with the tooth position of the pressure adjusting worm. The cam driving device drives the pressure regulating worm to rotate and simultaneously drives the eccentric shaft gear meshed with the pressure regulating worm to rotate, so that the rotary motion of the eccentric shaft is converted into the radial displacement action of the cam, the position of the cam is automatically adjusted up and down, and the precision is high.

Description

Technical Field

[0001] This utility model relates to the field of automation equipment technology, and more specifically, to an automatic cam up-and-down adjustment mechanism and a rotary press. Background Technology

[0002] A powder forming press is a device that presses metal or ceramic powder into a fixed shape (such as a block). Existing powder forming presses can be divided into top-and-bottom pressing powder forming presses and rotary powder forming presses. Traditional rotary powder forming presses generally use a cam-driven device where a cam abuts against an upper and lower pressure bar that rotates above or below it, causing the upper and lower pressure bars to simultaneously extend into the forming mold for powder forming and pressing. However, this cam-driven device usually uses a manual cam lifter to manually adjust the cam's position. Each adjustment requires stopping the machine and manual calibration, resulting in low production efficiency. Manual adjustment makes it difficult to ensure the accuracy of the cam position and the contact point between the pressure bar and the cam, which can easily lead to uneven product density or cracking, seriously affecting the consistency and quality of the formed products. Utility Model Content

[0003] The purpose of this invention is to overcome the above-mentioned defects in the prior art and provide an automatic cam up-and-down adjustment mechanism and rotary press that can convert the rotational motion through the eccentric shaft into the radial displacement action of the cam, with a high degree of automation and high adjustment accuracy.

[0004] To achieve the above objectives, the first aspect of this utility model provides an automatic cam up-and-down adjustment mechanism, including a cam mounting seat, a worm gear mounting seat, a pressure adjusting worm, a cam drive device, an eccentric shaft, a cam, an eccentric shaft gear, a bearing assembly, a first cam seat bushing, and a second cam seat bushing. The cam drive device is fixed on one side of the front of the cam mounting seat. The worm gear mounting seat is fixedly connected to the front of the cam mounting seat. The two ends of the pressure adjusting worm are rotatably disposed between the two inner side walls of the worm gear mounting seat via a worm shaft. The output shaft of the cam drive device passes through one side of the worm gear mounting seat and is connected to one end of the worm shaft, thereby driving the pressure adjusting worm to rotate. The front and rear ends of the eccentric shaft are rotatably disposed on the cam mounting seat via the first cam seat bushing and the second cam seat bushing, respectively. The cam is fixedly sleeved on the eccentric shaft via a bearing assembly. The cam is located in the bottom groove of the cam mounting seat and extends out of the cam mounting seat. The eccentric shaft gear is fixedly connected to the end of the eccentric shaft extending out of the front of the cam mounting seat, and the teeth of the eccentric shaft gear mesh with the teeth of the pressure adjusting worm.

[0005] Preferably, the cam drive device includes a cam drive motor, a motor mounting plate, a reducer, and a coupling. The cam drive motor is fixedly mounted on one side of the front of the cam mounting seat via the motor mounting plate. The output shaft of the cam drive motor is connected to the reducer. The drive shaft of the reducer is connected to one end of the worm gear shaft via the coupling.

[0006] Preferably, the bearing assembly includes a cam bearing and a cam-side bearing. The cam bearing is sleeved on the eccentric shaft, the cam is fixedly sleeved on the cam bearing, and the cam-side bearing is sleeved on the eccentric shaft and located between the cam bearing and the first cam seat bushing.

[0007] Preferably, the device also includes a first cam cover and a second cam cover, which are respectively embedded on the front and back surfaces of the cam mounting seat. The back surface of the first cam cover is provided with a cover positioning groove for mounting the cam side bearing.

[0008] Preferably, the cam bearing is a deep groove ball bearing, and the cam-side bearing is a roller bearing.

[0009] Preferably, the eccentric shaft key and eccentric shaft washer are also included. A first keyway is provided on the inner hole of the eccentric shaft gear, and a second keyway is provided on the outer wall of the eccentric shaft corresponding to the first keyway. The eccentric shaft key is snapped between the first keyway and the second keyway. The eccentric shaft washer is fixedly connected to the end of the eccentric shaft by a locking screw and is located on the front of the eccentric shaft gear.

[0010] Preferably, the cam mounting seat includes a cam seat and two support plates. The bottom surface of the cam seat has parallel first semicircular grooves on both sides. The support plates have second semicircular grooves corresponding to the first semicircular grooves. The first and second semicircular grooves are combined to form an annular structure for placing the tube part of the first cam seat bushing and the tube part of the second cam seat bushing. The support plates are fixedly connected to both sides of the bottom surface of the cam seat.

[0011] The second aspect of this utility model provides a rotary press, including a frame, a main shaft, an upper rotary table, a die plate, a lower rotary table, a plurality of upper punches, and a plurality of lower punches. The main shaft is longitudinally mounted on the frame. The upper rotary table, the die plate, and the lower rotary table are connected sequentially from top to bottom and can rotate together around the main shaft via a rotary drive device. The upper punches and lower punches are respectively provided and arranged in a ring and can be movably inserted into the corresponding holes of the upper and lower rotary tables. The press also includes the cam automatic adjustment mechanism described in the above technical solution. The cam automatic adjustment mechanism is fixedly installed at the bottom of the top plate of the frame and the top of the worktable of the frame. The cams of the cam automatic adjustment mechanism are located above the upper punches and below the lower punches.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This utility model features a novel structure and reasonable design. A cam drive device rotates the pressure-adjusting worm gear, which in turn drives the meshing eccentric shaft gear. This converts the rotational motion of the eccentric shaft into the radial displacement of the cam, achieving automatic up-and-down adjustment of the cam's position with high precision. During the pressing process of the rotary press, the initial position of the cam can be adjusted according to the pressing pressure requirements of different products. The pressing depth applied to the upper and lower punches will change accordingly, thus adjusting the pressure and time for pressing different products. It has a wide range of applications. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a front view structural schematic diagram of an automatic cam up-and-down adjustment mechanism provided in Embodiment 1 of this utility model;

[0016] Figure 2 This is a bottom view of the automatic cam up-down adjustment mechanism provided in Embodiment 1 of this utility model;

[0017] Figure 3 This is an exploded view of an automatic cam up-and-down adjustment mechanism provided in Embodiment 1 of this utility model;

[0018] Figure 4 This is an exploded view of the eccentric shaft and eccentric shaft gear provided in Embodiment 1 of this utility model;

[0019] Figure 5 This is an exploded view of the cam and bearing assembly provided in Embodiment 1 of this utility model;

[0020] Figure 6 This is a schematic diagram of the rotary press provided in Embodiment 2 of this utility model;

[0021] Figure 7 This is a partial structural schematic diagram of the rotary press provided in Embodiment 2 of this utility model;

[0022] Figure 8 This is an enlarged schematic diagram of the rotary press at the upper punch rod provided in Embodiment 2 of this utility model. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] Please refer to Figure 1 Embodiment 1 of this utility model provides an automatic cam up-and-down adjustment mechanism, including a cam mounting seat 1, a worm gear mounting seat 2, a pressure adjusting worm gear 3, a cam drive device 4, an eccentric shaft 5, a cam 6, an eccentric shaft gear 7, a bearing assembly 8, a first cam seat bushing 91, and a second cam seat bushing 92, etc. The various components of this embodiment will be described in detail below with reference to the accompanying drawings.

[0025] like Figures 1 to 3 As shown, the cam drive device 4 can be fixed on one side of the front of the cam mounting seat 1. The worm mounting seat 2 is fixedly connected to the front of the cam mounting seat 1. The two ends of the pressure adjusting worm 3 are rotatably set between the two inner side walls of the worm mounting seat 2 through the worm shaft 31. The output shaft of the cam drive device 4 passes through one side of the worm mounting seat 2 and is connected to one end of the worm shaft 31, which can drive the pressure adjusting worm 3 to rotate. The front and rear ends of the eccentric shaft 5 are rotatably mounted on the cam mounting seat 1 through the first cam seat bushing 91 and the second cam seat bushing 92, respectively. The cam 6 is fixedly sleeved on the eccentric shaft 5 through the bearing assembly 8. The cam 6 is located in the bottom groove of the cam mounting seat 1 and extends out of the cam mounting seat 1. The eccentric shaft gear 7 is fixedly connected to one end of the eccentric shaft 5 that extends out of the front of the cam mounting seat 1. The tooth position of the eccentric shaft gear 7 meshes with the tooth position of the pressure adjusting worm 3.

[0026] Among them, the worm shaft 31 meshes with the pressure regulating worm 3 and has a reverse self-locking characteristic, which prevents the eccentric shaft 5 from being displaced during operation and ensures operational stability.

[0027] Preferably, the worm gear mounting base 2 can be configured as an inverted structure.

[0028] like Figure 4As shown, specifically, it may also include an eccentric shaft key 51 and an eccentric shaft washer 71. A first keyway 70 is formed on the inner hole of the eccentric shaft gear 7, and a second keyway 50 is formed on the outer wall of the eccentric shaft 5 corresponding to the first keyway 70. The eccentric shaft key 51 is engaged between the first keyway 70 and the second keyway 50. The eccentric shaft washer 71 is fixedly connected to the end of the eccentric shaft 5 by a locking screw and is located on the front side of the eccentric shaft gear 7. The eccentric shaft gear 7 achieves axial and radial locking through the first keyway 70 and the second keyway 50, in conjunction with the washer 71. The eccentric shaft key 51 also ensures that the eccentric shaft gear 7 and the cam 6 are in phase synchronization.

[0029] Preferably, the cam drive device 4 may include a cam drive motor 41, a motor mounting plate 42, a reducer 43, and a coupling 44. The cam drive motor 41 is fixedly mounted on one side of the front of the cam mounting seat 1 through the motor mounting plate 42. The output shaft of the cam drive motor 41 is connected to the reducer 43. The drive shaft of the reducer 43 is connected to one end of the worm shaft 31 through the coupling 44.

[0030] In practice, the cam drive motor 41 can drive one end of the worm shaft 31 to rotate through the reducer 43 and the coupling 44. The pressure adjusting worm 3 is fixedly sleeved on the worm shaft 31, thereby driving the eccentric shaft gear 7 that meshes with the pressure adjusting worm 3 to rotate synchronously.

[0031] like Figure 5 As shown, the bearing assembly 8 may include a cam bearing 81 and a cam side bearing 82. The cam bearing 81 is sleeved on the eccentric shaft 5, the cam 6 is fixedly sleeved on the cam bearing 81, and the cam side bearing 82 is sleeved on the eccentric shaft 5 and located between the cam bearing 81 and the first cam seat bushing 91.

[0032] In this embodiment, the cam bearing 81 can be a deep groove ball bearing, and the cam-side bearing 82 can be a roller bearing. Of course, in other embodiments, the cam bearing 81 and the cam-side bearing 82 can also be other types of bearings.

[0033] Furthermore, it may also include a first cam cover 61 and a second cam cover 62, which are respectively embedded on the front and back surfaces of the cam mounting base 1. The back surface of the first cam cover 61 is provided with a cover positioning groove 611 for mounting the cam-side bearing 82. The first cam cover 61 and the second cam cover 62 can prevent impurities from entering the bearing assembly 8 and reduce wear.

[0034] Preferably, the cam mounting base 1 may include a cam seat 11 and two supporting pressure plates 12. The bottom surface of the cam seat 11 has parallel first semi-circular grooves 110 formed on both sides of its bottom edge. The supporting pressure plates 12 each have corresponding second semi-circular grooves 120. The first semi-circular grooves 110 and the second semi-circular grooves 120 combine to form an annular structure for placing the tube portion of the first cam seat bushing 91 and the tube portion of the second cam seat bushing 92. The supporting pressure plates 12 are fixedly connected to both sides of the bottom surface of the cam seat 11. The cam seat 11 and the two supporting pressure plates 12 can support and fix the bushing tube, reducing eccentric vibration during pressing. Example

[0035] Embodiment 2 of this utility model provides a rotary press, such as Figure 6 and Figure 7 As shown, the assembly may include a frame 100, a main shaft 10, an upper rotary table 101, a punching die plate 103, a lower rotary table 102, a plurality of upper punch rods 111 and a plurality of lower punch rods 112. The main shaft 10 is longitudinally mounted on the frame 100. The upper rotary table 101, the punching die plate 103 and the lower rotary table 102 are connected sequentially from top to bottom and can rotate together around the main shaft via a rotary drive device. The upper punch rods 111 and the lower punch rods 112 are respectively provided and arranged in a ring and can be inserted into the holes of their respective upper rotary table 101 and lower rotary table 102, and the assembly also includes the cam up and down automatic adjustment mechanism of the above embodiment. The cam up and down automatic adjustment mechanism is fixedly installed at the bottom of the top plate 104 of the frame 100 and the top of the worktable 105 of the frame 100, respectively. The cams 6 of the cam up and down automatic adjustment mechanism are located above the upper punch rods 111 and below the lower punch rods 112, respectively.

[0036] like Figure 8 As shown, during operation, the cam drive device 4 can drive the corresponding cams 6 to move up and down and make the cams 6 abut against the upper punch 111 and lower punch 112 that are rotated above or below them, thereby realizing the simultaneous insertion of the upper punch 111 and lower punch 112 into the female mold on the die plate 103 to press and form the powder.

[0037] In summary, this invention uses a cam drive device to rotate the pressure adjusting worm gear and simultaneously drive the eccentric shaft gear meshing with it, thereby converting the rotational motion of the eccentric shaft into the radial displacement action of the cam. This achieves automatic up-and-down adjustment of the cam position with high precision. During the pressing process of the rotary press, the initial position of the cam can also be adjusted according to the pressing pressure requirements of different products, and the pressing depth of the upper and lower punches will change accordingly, thus realizing the adjustment of the pressure and time for pressing different products. It has a wide range of applications.

[0038] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A cam automatic up-and-down adjustment mechanism, characterized in that: The device includes a cam mounting base, a worm gear mounting base, a pressure adjusting worm gear, a cam drive device, an eccentric shaft, a cam, an eccentric shaft gear, a bearing assembly, a first cam seat bushing, and a second cam seat bushing. The cam drive device is fixed to one side of the front of the cam mounting base. The worm gear mounting base is fixedly connected to the front of the cam mounting base. The two ends of the pressure adjusting worm gear are rotatably disposed between the two inner side walls of the worm gear mounting base via a worm gear shaft. The output shaft of the cam drive device passes through one side of the worm gear mounting base and is connected to one end of the worm gear shaft, driving the pressure adjusting worm gear to rotate. The front and rear ends of the eccentric shaft are rotatably mounted on the cam mounting base via the first cam seat bushing and the second cam seat bushing, respectively. The cam is fixedly sleeved on the eccentric shaft via a bearing assembly. The cam is located in the bottom groove of the cam mounting base and extends out of the cam mounting base. The eccentric shaft gear is fixedly connected to the end of the eccentric shaft extending out of the front of the cam mounting base, and the teeth of the eccentric shaft gear mesh with the teeth of the pressure adjusting worm gear.

2. The automatic cam up-and-down adjustment mechanism according to claim 1, characterized in that: The cam drive device includes a cam drive motor, a motor mounting plate, a reducer, and a coupling. The cam drive motor is fixedly mounted on one side of the front of the cam mounting seat via the motor mounting plate. The output shaft of the cam drive motor is connected to the reducer. The drive shaft of the reducer is connected to one end of the worm gear shaft via the coupling.

3. The automatic up-and-down adjustment mechanism for a cam according to claim 1, characterized in that: The bearing assembly includes a cam bearing and a cam-side bearing. The cam bearing is sleeved on the eccentric shaft, the cam is fixedly sleeved on the cam bearing, and the cam-side bearing is sleeved on the eccentric shaft and located between the cam bearing and the first cam seat bushing.

4. The automatic cam up-and-down adjustment mechanism according to claim 3, characterized in that: It also includes a first cam cover and a second cam cover, which are respectively embedded on the front and back surfaces of the cam mounting seat. The back of the first cam cover is provided with a cover positioning groove for mounting the cam side bearing.

5. The automatic up-and-down adjustment mechanism for a cam according to claim 3, characterized in that: The cam bearing is configured as a deep groove ball bearing, and the cam-side bearing is configured as a roller bearing.

6. The automatic cam up-and-down adjustment mechanism according to claim 1, characterized in that: It also includes an eccentric shaft key and an eccentric shaft washer. The inner hole of the eccentric shaft gear is provided with a first keyway, and the outer wall of the eccentric shaft is provided with a second keyway corresponding to the first keyway. The eccentric shaft key is snapped between the first keyway and the second keyway. The eccentric shaft washer is fixedly connected to the end of the eccentric shaft by a locking screw and is located on the front of the eccentric shaft gear.

7. The automatic cam up-and-down adjustment mechanism according to claim 1, characterized in that: The cam mounting base includes a cam seat and two support plates. The bottom surface of the cam seat has parallel semicircular grooves on both sides. The support plates have corresponding second semicircular grooves. The first and second semicircular grooves are combined to form an annular structure for placing the tube part of the first cam seat bushing and the tube part of the second cam seat bushing. The support plates are fixedly connected to both sides of the bottom surface of the cam seat.

8. A rotary press, comprising a frame, a main shaft, an upper rotary table, a die plate, a lower rotary table, a plurality of upper punches, and a plurality of lower punches, wherein the main shaft is longitudinally mounted on the frame, the upper rotary table, the die plate, and the lower rotary table are sequentially connected from top to bottom and are capable of rotating together around the main shaft via a rotary drive device, and the upper and lower punches are respectively provided and arranged in a ring and are movably inserted into their respective holes on the upper and lower rotary tables, characterized in that: It also includes the cam up-down automatic adjustment mechanism as described in any one of claims 1 to 7, wherein the cam up-down automatic adjustment mechanism is fixedly installed at the bottom of the top plate of the machine frame and the top of the worktable of the machine frame, and the cams of the cam up-down automatic adjustment mechanism are respectively located above the upper punch and below the lower punch.

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