Loosening prevention device for hopper valve plate of tablet press

Abstract

The utility model discloses an anti-loosening device for a hopper valve plate of a tablet press, which comprises a handle, a handle shaft, a support and a ball plunger, and the handle shaft is connected with the handle; a handle shaft axial limiting groove, a valve plate maximum opening limiting conical groove and a valve plate complete closing limiting conical groove are formed in the side wall of the handle shaft; the support is provided with a valve plate opening maximum limiting pin, a valve plate complete closing limiting pin and a handle shaft axial limiting pin. The handle shaft is rotationally connected with the support, and the handle shaft axial limiting pin is arranged in the handle shaft axial limiting groove; the handle is arranged between the valve plate opening maximum limit pin and the valve plate closing state limit pin; the ball head plunger is arranged on the support; when the valve plate is opened to the maximum degree, the handle makes contact with the valve plate opening maximum limiting pin, and the ball head of the ball head plunger is located in the valve plate opening maximum limiting conical groove. When the valve plate is completely closed, the handle makes contact with the valve plate complete closing limiting pin, and the ball head is located in the valve plate complete closing limiting conical groove. And the valve plate can be positioned in a self-locking manner when being completely closed and opened to the maximum extent.

Description

Technical Field

[0001] The present application relates to the technical field of tablet presses, and in particular to a tablet press hopper valve plate anti-loosening device. Background Art

[0002] The hopper is the feeding component of the tablet press. When the existing manual valve plate device of the tablet press hopper is working, the material is added from the upper entrance of the hopper, the handle is pushed upward, the handle shaft rotates, and the hopper valve plate is driven to open, and the material enters the tablet press from the lower entrance of the hopper. The tablet press press presses the material into tablets; when the tablet press finishes working or stops, the handle is pulled downward, the handle shaft rotates, and the hopper valve plate is driven to close to prevent the material from falling into the tablet press.

[0003] The existing handle shaft can only be positioned in the open and closed positions by the friction when the handle shaft is rotated, and cannot limit the erroneous rotation of the valve plate due to looseness; that is, the handle shaft cannot be positioned in the open and closed positions of the valve plate, resulting in the valve plate position being easily changed during the operation of the tablet press; especially when the valve plate is in the open state, after a period of operation, due to the vibration of the tablet press and the impact of uneven material flow, the valve plate cannot maintain the maximum open state and may even be in the closed state again, resulting in the material being unable to be discharged smoothly, affecting the material supply and the quality of the tablet product; and when the tablet press stops production and the hopper needs to be removed, the valve plate cannot be positioned in the closed state, resulting in material leakage. Utility Model Content

[0004] In view of at least one of the above-mentioned problems existing in the safety belt in the prior art, the present invention aims to provide a tablet press hopper valve plate anti-loosening device to solve the problem of the manual valve plate loosening during the operation of the tablet press, so that when the tablet press is in operation, the valve plate can self-lock in both the fully closed and fully opened states to maintain the maximum open or closed state.

[0005] To this end, the utility model provides a tablet press hopper valve plate anti-loosening device, comprising a handle, a handle shaft, a support and a ball plunger, wherein the handle shaft is connected to the handle and is used to connect the valve plate; the side wall of the handle shaft is provided with an annular groove-shaped handle shaft axial limit groove, a valve plate maximum opening limit conical groove and a valve plate fully closed limit conical groove; the support is used to be arranged at the bottom of the tablet press hopper; the support is provided with a valve plate maximum opening limit pin, a valve plate fully closed limit pin and a handle shaft axial limit pin; the handle shaft is rotatably connected to the support The axial limit pin of the handle shaft is arranged in the axial limit groove of the handle shaft; the handle is arranged between the maximum opening limit pin of the valve plate and the limit pin of the valve plate closing state; the ball plunger is arranged on the support; when the valve plate is opened to the maximum, the handle contacts the maximum opening limit pin of the valve plate, and the ball head of the ball plunger is located in the maximum opening limit conical groove of the valve plate; when the valve plate is fully closed, the handle contacts the fully closed limit pin of the valve plate, and the ball head is located in the fully closed limit conical groove of the valve plate.

[0006] The tablet press hopper valve plate anti-loosening device of the utility model is configured with the ball plunger arranged between the support and the handle shaft. When the handle drives the handle shaft and the valve plate to rotate, the ball plunger is clamped in the conical groove to limit the position of the valve plate.

[0007] Preferably, a valve plate partially open limit conical groove is set between the valve plate maximum opening limit conical groove and the valve plate fully closed limit conical groove, and the valve plate partially open limit conical groove, the valve plate maximum opening limit conical groove and the valve plate fully closed limit conical groove are set on the same circumference, and the central axis of the circumference coincides with the rotation axis of the handle shaft.

[0008] Preferably, the ball plunger comprises the ball head, a spring and a cylindrical shell, the spring is arranged in the shell, and the shell is connected to the support; the ball head part is arranged in the opening of the shell and is connected to the spring.

[0009] Preferably, the support is provided with a valve plate maximum opening limit pin hole, a valve plate fully closed limit pin hole, a handle shaft axial limit pin hole and a ball plunger hole, and the valve plate maximum opening limit pin, the valve plate fully closed limit pin, the handle shaft axial limit pin and the housing of the ball plunger are respectively connected to the valve plate maximum opening limit pin hole, the valve plate fully closed limit pin hole, the handle shaft axial limit pin hole and the ball plunger hole; two handle shaft axial limit pin holes and two handle shaft axial limit pins are each provided, and are symmetrically distributed and perpendicular to the first support shaft hole.

[0010] Preferably, the support is arranged at the bottom of the tablet press hopper, and the valve plate is rotatably arranged in the lower end hole of the tablet press hopper; the handle shaft is connected to one end of the first support shaft, and the axial limit groove of the handle shaft is arranged on the outer wall of one end of the first support shaft; the other end of the first support shaft is connected to one end of the valve plate.

[0011] Preferably, the support and the bottom of the tablet press hopper are both provided with a first support shaft hole, and the other end of the first support shaft passes through the first support shaft hole and is connected to one end of the valve plate.

[0012] Preferably, the other end of the valve plate is connected to a second support shaft; and the second support shaft is rotatably arranged at the bottom of the tablet press hopper.

[0013] Preferably, a support shaft axial limit pin is provided at the bottom of the tablet press hopper, and the support shaft axial limit pin is in contact with the other end of the second support shaft.

[0014] Preferably, a second support shaft hole and a support shaft axial limit pin hole are provided at the bottom of the tablet press hopper, and the second support shaft is rotatably arranged in the second support shaft hole; one end of the support shaft axial limit pin is connected to the support shaft axial limit pin hole, and a pin head is provided at the other end; the other end of the second support shaft is engaged with the pin head.

[0015] Preferably, the handle shaft is provided with a handle hole, and the handle is configured as an L-shaped curved rod, with one end connected to the handle hole.

[0016] The tablet press hopper valve plate anti-loosening device of the present application can achieve the following beneficial effects:

[0017] The tablet press hopper valve plate anti-loosening device of the present application installs a ball plunger on a support and provides a corresponding tapered groove on the end face of the handle shaft, so that the ball plunger can cooperate with the tapered groove to limit the position of the valve plate and prevent the valve plate from changing its position. It can solve the problem of the manual valve plate loosening during the operation of the tablet press, so that when the tablet press is in operation, the valve plate can self-lock in position in both the fully closed state and the fully opened state, thereby maintaining the fully opened or closed state. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1 This is a schematic diagram of the exploded structure of the tablet press hopper valve plate anti-loosening device of this application.

[0020] Figure 2This is a cross-sectional view of the exploded structure of the tablet press hopper valve plate anti-loosening device of the present application.

[0021] Figure 3 This is a schematic structural diagram of the tablet press hopper valve plate anti-loosening device of the present application.

[0022] Figure 4 This is a cross-sectional view of the tablet press hopper valve plate anti-loosening device of the present application in the maximum open state of the valve plate.

[0023] Figure 5 This is a left view of the tablet press hopper valve plate anti-loosening device of the present application in the maximum open state of the valve plate.

[0024] Figure 6 This is a cross-sectional view of the tablet press hopper valve plate anti-loosening device of the present application in a fully closed state.

[0025] Figure 7 This is a left view of the tablet press hopper valve plate anti-loosening device of the present application in a fully closed state of the valve plate.

[0026] Figure 8 This is a schematic structural diagram of the handle shaft of the tablet press hopper valve plate anti-loosening device of the present application.

[0027] Figure 9 This is a structural schematic diagram of the support of the tablet press hopper valve plate anti-loosening device of this application.

[0028] Figure 10 This is a structural cross-sectional view of the ball plunger of the tablet press hopper valve plate anti-loosening device of the present application.

[0029] Reference numerals in the figure: 100 is a tablet press hopper, 101 is a valve plate, 102 is a first support shaft, 103 is a second support shaft, 104 is a support shaft axial limit pin, 105 is a second support shaft hole, 106 is a support shaft axial limit pin hole, 107 is a hopper bottom tube, 1 is a handle, 2 is a handle shaft, 210 is an axial limit groove of the handle shaft, 221 is a valve plate maximum limit conical groove, 222 is a valve plate fully closed limit conical groove, 223 is a valve plate partially open limit conical groove, 230 is Handle hole, 240 is the handle fixing pin, 241 is the handle fixing pin hole; 3 is the support, 310 is the maximum limit pin for the valve plate to open, 311 is the maximum limit pin hole for the valve plate to open, 320 is the limit pin for the valve plate to be completely closed, 321 is the limit pin hole for the valve plate to be completely closed, 330 is the axial limit pin of the handle shaft, 331 is the axial limit pin hole of the handle shaft, 341 is the ball head plunger hole, 351 is the first support shaft hole, 4 is the ball head plunger, 410 is the ball head, 420 is the spring, and 430 is the shell. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the specific embodiments of this application and the corresponding drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0031] The following describes in detail the technical solutions provided by various embodiments of the present application in conjunction with the accompanying drawings.

[0032] Example

[0033] Please refer to Figures 1 to 10 , this embodiment provides a tablet press hopper valve plate anti-loosening device, including a handle 1, a handle shaft 2, a support 3 and a ball plunger 4, the handle shaft 2 is connected to the handle 1, and is used to connect the valve plate 101; the side wall of the handle shaft 2 is provided with an annular groove-shaped handle shaft axial limit groove 210, a valve plate maximum opening limit conical groove 221 and a valve plate fully closed limit conical groove 222; the support 3 is used to be set at the bottom of the tablet press hopper 100; the support 3 is provided with a valve plate maximum opening limit pin 310, a valve plate fully closed limit pin 320 and a handle shaft axial limit pin 330; the handle shaft 2 and the support are connected. 3 rotation connection, the handle shaft axial limit pin 330 is set in the handle shaft axial limit groove 210; the handle 1 is set between the valve plate maximum opening limit pin 310 and the valve plate closed state limit pin 320; the ball plunger 4 is set on the support 3; when the valve plate 101 is fully opened, the handle 1 contacts the valve plate maximum opening limit pin 310, and the ball head 410 of the ball plunger 4 is located in the valve plate maximum opening limit conical groove 221; when the valve plate 101 is fully closed, the handle 1 contacts the valve plate fully closed limit pin 320, and the ball head 410 is located in the valve plate fully closed limit conical groove 222.

[0034] The anti-loosening device for the valve plate of the tablet press hopper of this embodiment is as follows: when in use, the support 3 is set at the bottom of the tablet press hopper 100, and the valve plate 101 is rotated in the lower end hole of the tablet press hopper 100; the handle shaft 2 is connected to the valve plate 101; the handle 1 is rotated so that the handle 1 drives the handle shaft 2 and the valve plate 101 to rotate; when the valve plate 101 is rotated to be fully closed, the lower end hole of the tablet press hopper 100 is completely blocked by the valve plate 101, and at this time, the handle 1 contacts the limit pin 320 of the valve plate when it is fully closed, and the ball head 410 slides to the valve The plate is fully closed in the limiting conical groove 222, thereby limiting the handle shaft 2 and the valve plate 101 when the valve plate 101 is fully closed; when the valve plate 101 rotates to the maximum opening, the lower end hole of the tablet press hopper 100 is fully opened. At this time, the handle 1 contacts the valve plate maximum opening limiting pin 310, and the ball head 410 slides into the valve plate maximum opening limiting conical groove 221, thereby limiting the handle shaft 2 and the valve plate 101 when the valve plate 101 is fully opened, thereby preventing the handle shaft 2 and the valve plate 101 from rotating and loosening.

[0035] Specifically, the ball plunger 4 adopts a product of the existing technology.

[0036] like Figure 10 As shown, the ball plunger 4 includes a ball 410, a spring 420, and a cylindrical housing 430. The spring 420 is disposed in the housing 430, and the housing 430 is connected to the support 3. The ball 410 is partially disposed in the opening of the housing 430 and is connected to the spring 420. When the handle shaft 2 drives the valve plate 101 to rotate relative to the support 3, when the ball 410 is not in any of the tapered grooves, the spring 420 is compressed, and the portion of the ball 410 that is contracted in the housing 430 increases. As the handle shaft 2 and the support 3 rotate relative to each other, when the ball 410 slides into a tapered groove, the spring 420 extends under the action of the compression force, thereby squeezing the ball 410 into the tapered groove, thereby fixing the position of the valve plate 101 in this state.

[0037] like Figure 1 As shown, the handle shaft 2 opens a handle hole 230, and the handle 1 is configured as an L-shaped curved rod, with one end connected to the handle hole 230. This facilitates the rotation of the L-shaped handle 1 and also facilitates the fixed connection of the handle 1 to the handle shaft 2.

[0038] For example, the handle 1 and the handle shaft 2 are both provided with a handle fixing pin hole 241 , and the two are fixedly connected via a handle fixing pin 240 disposed in the handle fixing pin hole 241 .

[0039] like Figure 8As shown, in some embodiments, a partially open conical groove 223 is provided between the maximum valve plate opening conical groove 221 and the fully closed conical groove 222. The partially open conical groove 223, the maximum valve plate opening conical groove 221, and the fully closed conical groove 222 are arranged on the same circumference, and the central axis of the circumference coincides with the rotation axis of the handle shaft 2. This facilitates adjustment of the valve plate 101 to multiple rotational positions, thereby adjusting the valve plate 101 and the lower end hole of the tablet press hopper 100 to different opening degrees.

[0040] Please refer to Figures 1 to 10 In some embodiments, a valve plate maximum opening limit pin hole 311, a valve plate fully closed limit pin hole 321, a handle shaft axial limit pin hole 331 and a ball plunger hole 341 are provided on the support 3, and the valve plate maximum opening limit pin 310, the valve plate fully closed limit pin 320, the handle shaft axial limit pin 330 and the housing 430 of the ball plunger 4 are respectively connected to the valve plate maximum opening limit pin hole 311, the valve plate fully closed limit pin hole 321, the handle shaft axial limit pin hole 331 and the ball plunger hole 341; two handle shaft axial limit pin holes 331 and two handle shaft axial limit pins 330 are each provided, and are symmetrically distributed, and are both perpendicular to the first support shaft hole 351.

[0041] The handle shaft 2 is connected to one end of the first support shaft 102 , and the handle shaft axial limiting groove 210 is provided on the outer wall of one end of the first support shaft 102 ; the other end of the first support shaft 102 is connected to one end of the valve plate 101 .

[0042] The support 3 and the bottom of the tablet press hopper 100 are both provided with a first support shaft hole 351 , and the other end of the first support shaft 102 passes through the first support shaft hole 351 and is connected to one end of the valve plate 101 .

[0043] The support 3 is configured to be tubular, and the inner hole of the support 3 forms its first support shaft hole 351 .

[0044] Please refer to Figures 1 to 7 In some embodiments, the other end of the valve plate 101 is connected to the second support shaft 103; the second support shaft 103 is rotatably disposed at the bottom of the tablet press hopper 100.

[0045] A support shaft axial limiting pin 104 is provided at the bottom of the tablet press hopper 100 , and the support shaft axial limiting pin 104 contacts the other end of the second support shaft 103 .

[0046] Specifically, a second support shaft hole 105 and a support shaft axial limit pin hole 106 are provided at the bottom of the tablet press hopper 100, and the second support shaft 103 is rotatably arranged in the second support shaft hole 105; one end of the support shaft axial limit pin 104 is connected to the support shaft axial limit pin hole 106, and a pin head is provided at the other end; the other end of the second support shaft 103 is engaged with the pin head.

[0047] The central axis of the first support shaft 102 coincides with the central axis of the second support shaft 103 , which serves as the rotation axis of the valve plate 101 .

[0048] like Figure 8 and Figure 9 As shown, each tapered groove is configured as a conical groove and is provided on the end surface of the handle shaft 2 adjacent to the support 3. The ball plunger hole 341 is provided on the end surface of the support 3 adjacent to the handle shaft 2.

[0049] Please refer to Figures 1 to 10 The bottom of the tablet press hopper 100 is set as a hopper bottom tube 107, and the inner hole of the hopper bottom tube 107 forms the lower end hole of the tablet press hopper 100. The support 3 is set at the hopper bottom tube 107. The valve plate 101 is rotatably set in the hopper bottom tube 107. A first support shaft hole 351 is opened on one side wall of the hopper bottom tube 107, and a second support shaft hole 105 and a support shaft axial limit pin hole 106 are opened on the other side wall; the first support shaft 102 is rotatably set in the first support shaft hole 351, the second support shaft 103 is rotatably set in the second support shaft hole 105, and the support shaft axial limit pin 104 is fixedly connected in the support shaft axial limit pin hole 106.

[0050] A slot is formed at one end of the first support shaft 102 and the second support shaft 103 connected to the valve plate 101 , and both ends of the valve plate 101 are respectively connected to the slot.

[0051] The fulcrum axial limit pin hole 106, the handle fixing pin hole 241, the valve plate maximum opening limit pin hole 311, the valve plate fully closed limit pin hole 321 and the handle shaft axial limit pin hole 331 are all set as screw holes, and the fulcrum axial limit pin 104, the handle fixing pin 240, the valve plate maximum opening limit pin hole 310, the valve plate fully closed limit pin hole 320 and the handle shaft axial limit pin 330 are all set as bolts. The valve plate maximum opening limit pin 310, the valve plate fully closed limit pin 320, the handle shaft axial limit pin 330 and the housing 430 of the ball plunger 4 are respectively screwed in the valve plate maximum opening limit pin hole 311, the valve plate fully closed limit pin hole 321, the handle shaft axial limit pin hole 331 and the ball plunger hole 341.

[0052] When installing the tablet press hopper valve plate anti-loosening device of this embodiment, the valve plate 101 can be placed in the lower end hole of the tablet press hopper 100 first, and then the second support shaft 103 can be installed in the second support shaft hole 105 at the right end of the support 3. After the end of the valve plate 101 is clamped into the clamping groove of the second support shaft 103, the support shaft axial limit pin 104 is screwed into the support shaft axial limit pin hole 106 to limit the axial movement of the second support shaft 103; then the ball plunger 4 is placed in the ball plunger hole 341 on the left end surface of the support 3, and the handle shaft 2 is connected to the first support shaft 102 and passed through the first support shaft from the left end of the support 3. The shaft hole 351 allows the right end face of the handle shaft 2 to press the ball plunger 4, and at the same time, the left end of the valve plate 101 is engaged and connected to the groove at the right end of the first support shaft 102; then the handle shaft axial limit pin 330 is screwed into the handle shaft axial limit pin hole 331, and the end of the handle shaft axial limit pin 330 is movably set in the handle shaft axial limit groove 210 to limit the axial movement of the handle shaft 2; finally, the valve plate maximum opening limit pin 310 and the valve plate fully closed limit pin 320 are screwed into the valve plate maximum opening limit pin hole 311 and the valve plate fully closed limit pin hole 321 respectively.

[0053] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A tablet press hopper valve plate anti-loosening device, characterized in that: include: handle, A handle shaft is connected to the handle and is used to connect to the valve plate; the side wall of the handle shaft is provided with an annular groove-shaped handle shaft axial limit groove, a valve plate maximum opening limit conical groove, and a valve plate fully closed limit conical groove; A support is provided at the bottom of the tablet press hopper; the support is provided with a valve plate maximum opening limit pin, a valve plate fully closed limit pin, and a handle shaft axial limit pin; the handle shaft is rotatably connected to the support, and the handle shaft axial limit pin is provided in the handle shaft axial limit groove; the handle is provided between the valve plate maximum opening limit pin and the valve plate closed state limit pin; The ball plunger is arranged on the support; when the valve plate is opened to the maximum, the handle contacts the valve plate maximum opening limit pin, and the ball head of the ball plunger is located in the valve plate maximum opening limit conical groove; when the valve plate is completely closed, the handle contacts the valve plate complete closing limit pin, and the ball head is located in the valve plate complete closing limit conical groove.

2. The tablet press hopper valve plate anti-loosening device according to claim 1, characterized in that: A valve plate partially open limit conical groove is set between the valve plate maximum opening limit conical groove and the valve plate fully closed limit conical groove. The valve plate partially open limit conical groove and the valve plate maximum opening limit conical groove and the valve plate fully closed limit conical groove are set on the same circumference, and the central axis of the circumference coincides with the rotation axis of the handle shaft.

3. The tablet press hopper valve plate anti-loosening device according to claim 1, characterized in that: The ball plunger comprises the ball head, a spring and a cylindrical shell, wherein the spring is arranged in the shell, and the shell is connected to the support; the ball head portion is arranged in the opening of the shell and is connected to the spring.

4. The tablet press hopper valve plate anti-loosening device according to claim 3, characterized in that: The support is provided with a valve plate maximum opening limit pin hole, a valve plate complete closing limit pin hole, a handle shaft axial limit pin hole and a ball plunger hole. The valve plate maximum opening limit pin, the valve plate complete closing limit pin, the handle shaft axial limit pin and the housing of the ball plunger are respectively connected to the valve plate maximum opening limit pin hole, the valve plate complete closing limit pin hole, the handle shaft axial limit pin hole and the ball plunger hole; two handle shaft axial limit pin holes and two handle shaft axial limit pins are each provided, and are symmetrically distributed and perpendicular to the first support shaft hole.

5. The tablet press hopper valve plate anti-loosening device according to claim 4, characterized in that: The support is arranged at the bottom of the tablet press hopper, and the valve plate is rotatably arranged in the lower end hole of the tablet press hopper; the handle shaft is connected to one end of the first support shaft, and the axial limit groove of the handle shaft is arranged on the outer wall of one end of the first support shaft; the other end of the first support shaft is connected to one end of the valve plate.

6. The tablet press hopper valve plate anti-loosening device according to claim 5, characterized in that: The support and the bottom of the tablet press hopper are both provided with a first support shaft hole, and the other end of the first support shaft passes through the first support shaft hole and is connected to one end of the valve plate.

7. The tablet press hopper valve plate anti-loosening device according to claim 5, characterized in that: The other end of the valve plate is connected to a second support shaft; the second support shaft is rotatably arranged at the bottom of the tablet press hopper.

8. The tablet press hopper valve plate anti-loosening device according to claim 7, characterized in that: A support shaft axial limiting pin is provided at the bottom of the tablet press hopper, and the support shaft axial limiting pin is in contact with the other end of the second support shaft.

9. The tablet press hopper valve plate anti-loosening device according to claim 8, characterized in that: A second support shaft hole and a support shaft axial limit pin hole are provided at the bottom of the tablet press hopper, and the second support shaft is rotatably arranged in the second support shaft hole; one end of the support shaft axial limit pin is connected to the support shaft axial limit pin hole, and a pin head is provided at the other end; the other end of the second support shaft is engaged with the pin head.

10. The tablet press hopper valve plate anti-loosening device according to any one of claims 1 to 9, characterized in that: The handle shaft is provided with a handle hole, and the handle is configured as an L-shaped curved rod, with one end connected to the handle hole.

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