A double-layer telescopic push rod mechanism for automatic feeding and discharging

Abstract

The utility model provides a kind of double-layer telescopic push rod mechanism for automatic feeding and feeding, including upper roof, middle plate and lower bottom plate which are arranged in sequence and can slide horizontally between each other, wherein: first synchronous wheel and second synchronous wheel between the left and right ends of middle plate are connected using synchronous belt, and the upper and lower edges of synchronous belt are fixed to upper roof and lower bottom plate respectively;And transmission rack is provided on middle plate, and transmission rack is engagedly connected with main drive gear.The double-layer telescopic push rod mechanism of the utility model changes traditional long single slide rail gear rack into double-layer short slide rail gear rack, and is combined with synchronous belt drive, eliminates the protruding part of equipment, without expanding clean area, improves compactness and motion stability.

Description

Technical Field

[0001] This utility model relates to the field of pharmaceutical equipment technology, and in particular to a double-layer telescopic push rod mechanism for automatic feeding and discharging. Background Technology

[0002] In the pharmaceutical industry, filling and freeze-drying feeding areas require a strict Class A clean environment. The size of these areas directly affects the construction and maintenance costs of the pharmaceutical plant. Traditional feeding and discharging push rod mechanisms typically use a long rack to drive a long slide rail in a telescopic motion to achieve automatic material feeding and discharging. However, this design has significant drawbacks: the long rack and slide rail protrude a certain distance from the equipment (usually the length of the push rod stroke). To accommodate this protrusion, the clean area must be expanded, leading to a substantial increase in construction costs (such as air conditioning systems and purification facilities) and maintenance costs (such as cleaning and energy consumption). Furthermore, the long rack and slide rail structure occupies a large space, has poor overall aesthetics, and is prone to vibration or jamming due to insufficient rigidity after long-term use, affecting reliability.

[0003] To address the aforementioned issues, our company has developed this utility model of a double-layer telescopic push rod mechanism. By replacing the long single slide rail gear rack with a double-layer short slide rail gear rack and combining it with synchronous belt drive, the protruding parts of the equipment are eliminated, eliminating the need to expand the clean area, while improving the structural compactness and smoothness of movement. Utility Model Content

[0004] This invention addresses the problem of large space occupation and high cleanroom costs caused by long rack and pinion push rod mechanisms in existing technologies. It provides a double-layer telescopic push rod mechanism for automatic feeding and unloading, which has a compact structure, smooth movement, and can effectively reduce the space occupied by the equipment and lower the maintenance costs of the cleanroom.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution:

[0006] A double-layer telescopic push rod mechanism for automatic feeding and unloading includes an upper top plate, a middle plate, and a lower bottom plate arranged vertically and horizontally sliding between each other. The first and second synchronous pulleys at the left and right ends of the middle plate are connected by a synchronous belt, and the upper and lower edges of the synchronous belt are fixed to the upper top plate and the lower bottom plate, respectively. A transmission rack is provided on the middle plate, and the transmission rack meshes with the main drive gear.

[0007] Preferably, the top plate, middle plate, and bottom plate are all elongated plate structures, arranged in parallel intervals between each other, and the width of the middle plate is smaller than the width of the middle plate and the bottom plate, so as to form a clearance area between one side end of the middle plate and the bottom plate for installing the first synchronous pulley, the second synchronous pulley, and the synchronous belt.

[0008] Preferably, the top plate and the middle plate are arranged parallel to each other vertically and at intervals, and are slidably connected by a first guide rail assembly arranged along their length.

[0009] Preferably, the intermediate plate and the lower base plate are arranged parallel to each other vertically and at intervals, and are slidably connected by a second guide rail assembly arranged along their length.

[0010] Preferably, the lower base plate and the main drive gear are fixedly installed on a fixed frame in the clean area, and the main drive gear is connected to a drive motor.

[0011] Preferably, the first and second synchronous pulleys are fixedly installed at both ends of the front sidewall of the intermediate plate using wheel axles, and the transmission rack is fixedly installed at the bottom of the rear sidewall of the intermediate plate.

[0012] Preferably, the downlink belt of the synchronous belt is fixedly installed on the top of the lower base plate by screws through the first synchronous belt pressure plate, and its uplink belt is fixedly installed on the bottom of the upper top plate by screws through the second synchronous belt pressure plate.

[0013] More preferably, the two fixed points formed by the first synchronous belt pressure plate and the second synchronous belt pressure plate are arranged in a staggered left-right arrangement or in a central arrangement at their initial positions.

[0014] Preferably, the first timing belt pressure plate is arranged close to the first timing pulley in its initial position, and the second timing belt pressure plate is arranged close to the second timing pulley in its initial position, with the two arranged diagonally.

[0015] Preferably, the transmission rack is fixedly installed on the bottom plate position at one end of the middle plate along the extension and retraction direction of the middle plate, and its left or right end is meshed with the main drive gear in the initial position.

[0016] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0017] (1) Space saving: By adopting the double-layer telescopic design of the top plate and middle plate with the bottom plate as the installation base, the overall length of the push rod mechanism is shortened by more than 50%, eliminating the protruding parts of the equipment, eliminating the need to expand the clean area, and significantly reducing the construction and maintenance costs of the pharmaceutical plant.

[0018] (2) Structural optimization: The design adopts two short slide rail assemblies and a set of synchronous belt drive to connect the top plate, middle plate and bottom plate into a whole. The structure is compact, lightweight, aesthetically pleasing and easy to integrate into existing equipment.

[0019] (3) Smooth movement: It adopts a dual transmission of synchronous belt and gear rack, which synchronously drives the upper plate and the middle plate to move synchronously. It has high motion synchronization and low vibration, and is suitable for high-precision filling and freeze-drying processes.

[0020] (4) High reliability: Each structural component adopts a modular design, which makes installation and disassembly simple and maintenance convenient; and the timing belt and each slide rail are made of wear-resistant materials, with a long service life, ensuring the overall reliability during operation;

[0021] (5) Wide applicability: This double-layer telescopic push rod mechanism is not only suitable for the pharmaceutical industry, but also for automatic feeding and discharging scenarios that require a clean environment, such as food and electronics. It has a wide range of applications and is highly practical. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of a double-layer telescopic push rod mechanism for automatic feeding and unloading of materials, before it is unfolded.

[0023] Figure 2 This is a schematic diagram of the main structure of a double-layer telescopic push rod mechanism for automatic feeding and unloading of materials, before it is unfolded.

[0024] Figure 3 This is a three-dimensional structural diagram of a double-layer telescopic push rod mechanism for automatic feeding and unloading according to the present invention.

[0025] Figure 4 This is a schematic diagram of the unfolded main structure of a double-layer telescopic push rod mechanism for automatic feeding and discharging according to this utility model.

[0026] The accompanying figures are labeled as follows:

[0027] 1-Top plate, 2-First slide rail, 3-Intermediate plate, 4-Second slide rail, 5-Lower base plate, 6-First synchronous pulley, 7-First synchronous belt pressure plate, 8-Synchronous belt, 9-Second synchronous belt pressure plate, 10-Second synchronous belt, 11-Main drive gear, 12-Transmission rack. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0029] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] In some embodiments, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a double-layer telescopic push rod mechanism for automatic feeding is provided, which is applied at the junction of the filling and freeze-drying feeding areas. The mechanism mainly includes an upper top plate 1, a middle plate 3 and a lower bottom plate 5, which are arranged in parallel intervals and are horizontally relative to each other through a guide rail assembly.

[0031] Specifically, a first synchronous pulley 6 and a second synchronous pulley 10 are installed at the left and right ends of the intermediate plate 3, and a synchronous belt 8 surrounds the two pulleys to form a closed loop. The upper belt body of the synchronous belt 8 is fixed to the upper top plate 1, and the lower belt body is fixed to the lower bottom plate 5. A transmission rack 11 is fixed on the intermediate plate 3, which meshes with the main drive gear 12; the main drive gear 12 is driven by a drive motor, and drives the intermediate plate 3 to move through the rack transmission.

[0032] The core of this double-layer telescopic push rod mechanism lies in its double-layer sliding structure consisting of a top plate 1, a middle plate 3, and a bottom plate 4, combined with synchronous belt transmission 8 and gear and rack drive, to achieve synchronous extension and retraction of the top plate 1 and the middle plate 3 as push rods. Specifically, the middle plate 3 moves via gear and rack drive, and simultaneously moves in conjunction with the top plate 1 via synchronous belt, causing the top plate 1 and the middle plate 3 to extend and retract synchronously relative to the bottom plate 5, thereby shortening the overall length of the push rod mechanism and preventing the equipment from protruding.

[0033] In some of these embodiments, such as Figure 2 , Figure 3 and Figure 4 As shown, the top plate 1, the middle plate 3, and the bottom plate 5 are all long strip-shaped plate structures, all made of stainless steel or aluminum alloy, preferably SUS304 stainless steel. SUS304 stainless steel has excellent high temperature resistance and corrosion resistance, and its surface finish meets GMP requirements. It is easy to clean and disinfect, and is suitable for the harsh environment of the pharmaceutical industry.

[0034] It is worth noting that the width of the intermediate plate 3 is smaller than that of the upper top plate 1 and the lower bottom plate 5, thus forming a clearance area on one side of the intermediate plate 3 and the lower bottom plate 5 for installing the timing pulley and timing belt. The clearance area design avoids interference between the transmission components and the plates, optimizes space utilization, makes the overall structure more compact, lightweight and aesthetically pleasing, and easy to integrate into existing equipment.

[0035] In some of these embodiments, such as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the upper top plate 1 and the middle plate 3 are slidably connected by a first guide rail assembly 2. This guide rail assembly includes a rail fixed to the middle plate 3 by bolts and a slider fixed to the upper top plate 1, arranged along the length of the plates. Specifically, the first guide rail assembly 2 uses a linear guide rail or a ball bearing rail to ensure that the upper top plate 1 slides smoothly relative to the middle plate 3, reducing friction and noise.

[0036] Similarly, the middle plate 3 and the lower base plate 5 are slidably connected by the second guide rail assembly 4, similar to the first guide rail assembly 2. This assembly includes a rail fixed to the middle plate 3 by bolts and a slider fixed to the lower base plate 5, arranged along the length of the plates. The second guide rail assembly 4 is arranged in an upward corresponding manner to the first assembly, ensuring the overall rigidity of the mechanism. The length of the upper and lower rail assemblies is shorter than in traditional designs, greatly reducing the space occupied.

[0037] It is worth noting that, to ensure the installation and stable operation of this double-layer telescopic push rod mechanism, the lower base plate 5 is bolted to the frame in the clean area, providing a stable mounting foundation for the entire mechanism. The main drive gear 12 is also fixed to the frame and connected to the drive motor. The drive motor is a servo motor, used to drive the main drive gear to rotate forward and backward, achieving the telescopic purpose of the push rod. If needed, the drive motor can be integrated with a conventional encoder to achieve precise control of the push rod stroke. By fixing the lower base plate 5 to the equipment frame, the stability of the mechanism is enhanced, allowing it to adapt to high-frequency operation.

[0038] In some of these embodiments, such as Figure 1 and Figure 3 As shown, the first synchronous pulley 6 and the second synchronous pulley 10 are both mounted on the two ends of the front side wall of the intermediate plate 3 using wheel axles. Each synchronous pulley is supported by bearings to reduce rotational resistance. The transmission rack 11 is fixed to the bottom of the rear end of the intermediate plate 3 by screws. By arranging the transmission rack 11 at the bottom of the rear end, the whole is arranged in a spaced manner to avoid interference with the synchronous belt and improve transmission efficiency.

[0039] In some of these embodiments, such as Figure 1 , Figure 3 and Figure 4 As shown, the synchronous belt 8 is mechanically fixed to the upper top plate 1 and the lower bottom plate 5 using fasteners, forming two fixed points. The downward belt body of the synchronous belt 8 is fixed to the top of the lower bottom plate 5 by the first synchronous belt pressure plate 7, and the upward belt body is fixed to the bottom of the upper top plate 1 by the second synchronous belt pressure plate 9, both using screws for fastening.

[0040] Specifically, both the first synchronous belt pressure plate 7 and the second synchronous belt pressure plate 9 can adopt a convex-shaped pressure plate or a flat plate structure, and the belt body is evenly pressed by multiple screws to prevent slippage; and the installation positions of the first synchronous belt pressure plate 7 and the second synchronous belt pressure plate 9 on the upper top plate 1 and the lower bottom plate 5 can be flexibly adjusted as needed to meet the production requirements of different telescopic strokes.

[0041] In terms of materials, the synchronous belt 8 can be made of high-strength rubber or polyurethane, with tooth profile matching the synchronous pulley to ensure transmission accuracy; the upper top plate 1, middle plate 3 and lower bottom plate 5 are all made of aluminum alloy or stainless steel to reduce weight and resist corrosion.

[0042] Depending on the actual application requirements, the two fixed points formed by the first synchronous belt pressure plate 7 and the second synchronous belt pressure plate 9 can be arranged in a staggered manner or centrally in their initial positions. A staggered arrangement of the two fixed points, such as a diagonal arrangement, can balance the synchronous belt tension and improve motion stability; while a central arrangement is suitable for symmetrical load scenarios and simplifies the design.

[0043] As one of the preferred embodiments, such as Figure 1 and Figure 2 As shown, the first synchronous belt pressure plate 7 is initially positioned close to the first synchronous pulley 6, and the second synchronous belt pressure plate 9 is positioned close to the second synchronous pulley 10; the two are arranged diagonally. This diagonal arrangement ensures that the synchronous belt 8 maintains uniform tension during operation, extends its service life, and reduces vibration.

[0044] In some of these embodiments, such as Figure 1 and Figure 2 As shown, the transmission rack 11 is fixed to the bottom of one side end of the intermediate plate 3 along its extension and retraction direction. In its initial position, its left or right end meshes with the main drive gear 12. Specifically, the installation position of the transmission rack 11 is designed according to the push rod stroke, and the rack length is shorter than that of the traditional design, reducing processing costs. Preferably, as shown... Figure 1 and Figure 2 As shown, in the initial position of the mechanism, the left end of the transmission rack 11 is engaged with the main drive gear 12 to maximize the extension and retraction stroke of the upper top plate 1.

[0045] Combination Figures 1 to 4 As shown, taking the extension action as an example, the working process of this double-layer telescopic push rod mechanism for automatic feeding is as follows:

[0046] Initial state: Top plate 1, middle plate 3, and bottom plate 5 are in the contracted position, and timing belt 8 is taut. Figure 1 and Figure 2 As shown.

[0047] Drive phase: The drive motor drives the main drive gear 12 to rotate counterclockwise, meshing with the transmission rack 11, pushing the intermediate plate 3 forward, specifically as shown in the figure, moving to the left. As the intermediate plate 3 moves, the first synchronous pulley 6 and the second synchronous pulley 10 fixed on it move forward accordingly.

[0048] Synchronous belt drive stage: The downward belt of synchronous belt 8 is fixed to the lower base plate 5 by the first synchronous belt pressure plate 7. Therefore, when the middle plate 3 moves, synchronous belt 8 moves backward relative to the middle plate 3, as shown in the figure, such as moving to the right. This forces the upward belt of synchronous belt 8 to drive the upper top plate 1 forward through the second synchronous belt pressure plate 9.

[0049] Extension stage: The middle plate 3 and the upper top plate 1 move forward simultaneously, but through the synchronous belt 8, the upper top plate 1 moves twice the distance of the middle plate 3. Due to the relative motion of the synchronous belt 8 at a fixed point, the push rod achieves double-layer extension and retraction. Finally, the push rod mechanism extends as a whole, as shown... Figure 3 and Figure 4 As shown.

[0050] Retraction phase: Control the main drive gear 12 to rotate clockwise, and in the reverse process, the mechanism retracts to its original position. Throughout the entire process, each guide rail assembly ensures smooth movement, and the synchronous belt 8 ensures synchronicity.

[0051] In summary, this double-layer telescopic push rod mechanism achieves the telescopic movement of the slide rail by replacing the original long single-slide rail gear rack with a double-layer short slide rail gear rack, and by adding two synchronous pulleys and a synchronous belt. The synchronous belt has two fixed points: one stationary and one follower. When the synchronous pulleys rotate, they move the synchronous belt. The stationary point on the synchronous belt remains stationary, while the follower moves forward or backward with the movement of the synchronous belt, thus completing the overall telescopic movement of the mechanism.

[0052] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0053] Secondly, the accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0054] Finally, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A double-layer telescopic push rod mechanism for automatic feeding and unloading, characterized in that, It includes an upper top plate (1), a middle plate (3) and a lower bottom plate (5) arranged vertically and horizontally sliding between each other. The first synchronous pulley (6) and the second synchronous pulley (10) at the left and right ends of the middle plate (3) are connected by a synchronous belt (8). The upper and lower edges of the synchronous belt (8) are fixed to the upper top plate (1) and the lower bottom plate (5) respectively. A transmission rack (11) is provided on the middle plate (3), and the transmission rack (11) is meshed with the main drive gear (12).

2. The double-layer telescopic push rod mechanism according to claim 1, characterized in that, The top plate (1), middle plate (3) and bottom plate (5) are all long strip plate structures, arranged in parallel intervals between the top and bottom. The width of the middle plate (3) is smaller than the width of the middle plate (3) and the bottom plate (5) to form a clearance area between one side end of the middle plate (3) and the bottom plate (5) for installing the first synchronous pulley (6), the second synchronous pulley (10) and the synchronous belt (8).

3. The double-layer telescopic push rod mechanism according to claim 1, characterized in that, The top plate (1) and the middle plate (3) are arranged parallel to each other and spaced apart, and are slidably connected by a first guide rail assembly (2) arranged along their length.

4. The double-layer telescopic push rod mechanism according to claim 1, characterized in that, The intermediate plate (3) and the lower base plate (5) are arranged parallel to each other vertically and at intervals, and are slidably connected by a second guide rail assembly (4) arranged along their length.

5. The double-layer telescopic push rod mechanism according to claim 1, characterized in that, The lower base plate (5) and the main drive gear (12) are fixedly installed on the frame fixed in the clean area, and the main drive gear (12) is connected to the drive motor.

6. The double-layer telescopic push rod mechanism according to claim 1, characterized in that, The first synchronous pulley (6) and the second synchronous pulley (10) are respectively fixedly installed at both ends of the front side wall of the intermediate plate (3) by means of wheel axles, and the transmission rack (11) is fixedly installed at the bottom of the rear side of the intermediate plate (3).

7. The double-layer telescopic push rod mechanism according to claim 1, characterized in that, The downlink belt of the synchronous belt (8) is fixedly installed on the top of the lower base plate (5) by screws through the first synchronous belt pressure plate (7), and its uplink belt is fixedly installed on the bottom of the upper top plate (1) by screws through the second synchronous belt pressure plate (9).

8. The double-layer telescopic push rod mechanism according to claim 7, characterized in that, The two fixed points formed by the first synchronous belt pressure plate (7) and the second synchronous belt pressure plate (9) are either staggered to the left and right or centered at their initial positions.

9. The double-layer telescopic push rod mechanism according to claim 8, characterized in that, The first synchronous belt pressure plate (7) is arranged close to the first synchronous pulley (6) in the initial position, and the second synchronous belt pressure plate (9) is arranged close to the second synchronous pulley (10) in the initial position, and the two are arranged diagonally.

10. The double-layer telescopic push rod mechanism according to claim 1, characterized in that, The transmission rack (11) is fixedly installed on the bottom plate position of one side end of the intermediate plate (3) along the extension and retraction direction of the intermediate plate (3), and its left or right end is meshed with the main drive gear (12) in the initial position.

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