A leather-tanning rotary drum horizontal automatic door

Abstract

A horizontal automatic door for leather tanning with a rotary drum includes a door frame, a drum door, rollers, an eccentric shaft, and a sealing strip. The rollers are mounted on the drum door and cooperate with guide rails on the door frame. The sealing strip is located below the drum door. The eccentric shaft is mounted on the drum door. The door also includes a drive assembly, a transmission assembly, an elastic element, and a limiting element. The drive assembly is mounted on the door frame. The transmission assembly is connected to both the drive assembly and the eccentric shaft. The elastic element is sleeved on the eccentric shaft and cooperates with both the transmission assembly and the drum door. The limiting element is mounted on the door frame to limit the movement of the drum door.

Description

Technical Field

[0001] This utility model relates to the technical field of leather processing equipment, and in particular to a horizontal automatic door for a leather tanning drum. Background Technology

[0002] In the leather processing process, the leather tanning drum is a key piece of equipment, and the drum gate, as an important component of the drum, directly affects the working efficiency and performance of the drum.

[0003] Currently, most leather tanning drums use horizontal manual doors. These doors consist of a frame and a door itself. The door is equipped with rollers and can move along guide rails on the frame. Two eccentric shafts are mounted on the door, and a sealing strip is installed at the bottom. Each eccentric shaft has a handle and hooks at both ends, which can be hooked onto the bottom of the door frame. To close the drum door, the eccentric shafts are manually rotated, applying force through the handles to rotate the shafts and press the door against the frame, achieving a seal using the sealing strip. To open, the eccentric shafts are rotated in the opposite direction to separate the door from the frame, and then the door is pushed along the guide rails to open.

[0004] However, this type of manual door has obvious shortcomings: on the one hand, manually opening and closing the door consumes a lot of the worker's physical strength and increases labor intensity; on the other hand, with the development of industrial automation, the automatic operation of the drum has become a trend, and manual opening and closing the door cannot meet the requirements of automation, thus restricting the improvement of production efficiency. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a rotary drum horizontal automatic door with a high degree of mechanization.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A horizontal automatic door for leather tanning with a rotary drum includes a door frame, a drum door, rollers, an eccentric shaft, and a sealing strip. The rollers are mounted on the drum door and cooperate with guide rails on the door frame. The sealing strip is located below the drum door. The eccentric shaft is mounted on the drum door. The door also includes a drive assembly, a transmission assembly, an elastic element, and a limiting element. The drive assembly is mounted on the door frame. The transmission assembly is connected to both the drive assembly and the eccentric shaft. The elastic element is sleeved on the eccentric shaft and cooperates with both the transmission assembly and the drum door. The limiting element is mounted on the door frame to limit the movement of the drum door.

[0008] Furthermore, the drive assembly includes a cylinder mounted on the side of the door frame.

[0009] Furthermore, there are two cylinders, which are installed on the upper and lower sides of the door frame, respectively.

[0010] Furthermore, the cylinder is fixed to a bracket on the side of the door frame by a mounting seat.

[0011] Furthermore, the transmission assembly includes a crank and a connecting rod, one end of the connecting rod being connected to the drive assembly, the other end of the connecting rod being connected to one end of the crank, and the other end of the crank being connected to an eccentric shaft.

[0012] Furthermore, the number of cranks and connecting rods corresponds one-to-one with the number of drive components.

[0013] Furthermore, one end of the connecting rod is hinged to the piston rod of the drive assembly.

[0014] Furthermore, the other end of the connecting rod is hinged to one end of the crank, and the other end of the crank is connected to the eccentric shaft.

[0015] Furthermore, the elastic element is a torsion spring, which is sleeved on the eccentric shaft, with one end of the torsion spring connected to the transmission assembly and the other end connected to the drum.

[0016] Furthermore, the limiting member is a limiting block, which is installed at the end of the door frame to limit the movement of the drum door.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Through automated operation, there is no need for manual opening and closing of doors, reducing the labor intensity of workers.

[0019] 2. It can be used in conjunction with the automatic water filling, drainage, and operation systems of the drum to automate the drum's operation process and reduce manual intervention.

[0020] 3. It saves manual operation time, and one person can supervise more drums, improving overall production efficiency and having good economic and social benefits. Attached Figure Description

[0021] Figure 1 This is one of the three-dimensional views of this utility model.

[0022] Figure 2 This is the second perspective view of the present utility model.

[0023] Figure 3 This is a top view of the present invention.

[0024] Figure 4 This is a bottom view of the present invention.

[0025] Figure 5 This is the left view of the present invention.

[0026] Figure 6 This is the right view of the present invention.

[0027] In the diagram: 1. Door frame, 2. Drum door, 3. Roller, 4. Eccentric shaft, 5. Sealing strip, 6. Cylinder, 7. Crank, 8. Connecting rod, 9. Torsion spring, 10. Limit block. Detailed Implementation

[0028] To make the objectives, technical solutions, and beneficial effects of the embodiments in this disclosure clearer, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0029] like Figure 1-5 As shown, the leather tanning drum horizontal automatic door of this embodiment, while retaining the basic structure of the door frame 1, drum door 2, roller 3, eccentric shaft 4 and sealing strip 5 in the prior art, achieves automated control by adding a drive assembly, transmission assembly, elastic element and limiting element. The specific settings and cooperation relationships of each component are as follows:

[0030] I. Basic Structure and Coordination

[0031] Door frame 1: As the installation base of the entire automatic door, two parallel guide rails are set on the inner side along the horizontal direction. The length of the guide rails is adapted to the moving stroke of the drum door 2, providing sliding support for the rollers 3.

[0032] Drum door 2: The whole is a rectangular plate structure, and its size matches the opening size of the door frame 1, so that it can completely cover the opening of the door frame 1. Rollers 3 are symmetrically installed on both sides of the drum door 2. The wheels of the rollers 3 are embedded in the guide rails of the door frame 1, and can roll smoothly along the guide rails, so that the drum door 2 can move left and right in the horizontal direction.

[0033] Eccentric shaft 4: Made of stainless steel, it is installed parallel to the upper edges of the drum gate 2. Both ends are rotatably connected to the drum gate 2 via bearings, and it can rotate freely around its own axis. There is an eccentricity between the axis of eccentric shaft 4 and the geometric center of the shaft body, which provides the structural basis for the raising and lowering of the drum gate 2.

[0034] Sealing strip 5: Made of wear-resistant and corrosion-resistant rubber, it is a long strip fixed to the lower edge of the drum door 2, with a length consistent with the width of the drum door 2. When the drum door 2 is closed, the sealing strip 5 can fit tightly against the bottom edge of the door frame 1, achieving a seal through compression deformation.

[0035] In traditional structures, the axis of the eccentric shaft does not coincide with the geometric center of the shaft body, resulting in a certain eccentricity. When the eccentric shaft rotates, the part connecting it to the door will undergo displacement. Therefore, the worker applies force by rotating the handle on the eccentric shaft, causing it to rotate around its own axis. Since the eccentric shaft is mounted on the door, and the hooks at both ends are attached to the bottom of the door frame, when the eccentric shaft rotates, its eccentric characteristic creates a downward pressure on the door (or causes the door to move towards the door frame). This force pulls the entire door closer to the door frame, ultimately pressing the door firmly against it. Simultaneously, the sealing strip at the bottom of the door is compressed, thus achieving a sealing effect.

[0036] Therefore, based on the above principles, electrifying and automating the aforementioned structure can greatly improve work efficiency and reduce labor costs.

[0037] II. Setting up and coordinating new components

[0038] Drive Components: A cylinder 6 is used as the drive source. Its working principle is to convert the pressure energy of compressed gas into mechanical energy, thereby achieving the linear reciprocating motion of the piston rod. Specifically, a piston is installed inside the cylinder 6, dividing the cylinder into two chambers. When compressed gas enters from the rodless chamber, it pushes the piston towards the rod chamber, causing the piston rod to extend; when it enters from the rod chamber, it pushes the piston towards the rodless chamber, causing the piston rod to retract. The cylinder 6 is fixed to the external brackets on both sides of the door frame 1 by bolts. The piston rod extends horizontally towards the drum 2 and is connected to an external air source device (such as an air compressor) via an air pipe. A solenoid valve is installed on the air pipe. By controlling the on / off state and reversal of the solenoid valve, the extension and retraction of the piston rod and its movement speed are precisely controlled, providing stable power for the movement and pressing of the drum 2.

[0039] The transmission assembly consists of a crank 7 and a connecting rod 8. The crank 7 is a metal rod-shaped structure, with one end fixed to the end of the eccentric shaft 4 via a key, rotating synchronously with the eccentric shaft 4; the other end is hinged to one end of the connecting rod 8 via a pin, allowing it to rotate relative to the connecting rod 8. The connecting rod 8 is also a metal rod-shaped structure, with its other end hinged to the end of the piston rod of the cylinder 6 via a pin, allowing it to rotate relative to the piston rod. Through the hinged connection between the crank 7 and the connecting rod 8, the linear extension and retraction motion of the piston rod of the cylinder 6 is converted into the rotational motion of the eccentric shaft 4.

[0040] Elastic component: A torsion spring 9 is used, which is sleeved on an eccentric shaft 4 near the right side of the door frame 1. One end of the torsion spring 9 is connected to the middle of the crank 7 via a hook, and the other end is fixed in position by a limiting block. In its natural state, the torsion spring 9 is in a pre-tensioned state, applying a counterclockwise torque to the crank 7, keeping the crank 7 at a specific angle (corresponding to the state where the door 2 is raised and the sealing strip 5 is removed from the door frame 1).

[0041] Limiting component: A metal limiting block 10 is bolted to the inner wall of the left end of the door frame 1, and its installation height is adapted to the side of the drum door 2. When the drum door 2 moves to the left to the closed position, its left edge will contact the limiting block 10 and be blocked from moving, thus limiting the maximum leftward movement of the drum door 2.

[0042] III. Component Interaction During Operation

[0043] Opening process:

[0044] In the initial state, the drum door 2 is in the closed position, the piston rod of the cylinder 6 is in the extended state, the crank 7 and the connecting rod 8 are in the position to press the eccentric shaft 4 against the drum door 2, and the sealing strip 5 is tightly fitted with the door frame 1.

[0045] When the door needs to be opened, the solenoid valve is switched, and compressed gas enters the rod chamber of cylinder 6, pushing the piston rod to retract. The piston rod drives the crank 7 to rotate counterclockwise around the axis of the eccentric shaft 4 via the connecting rod 8. At this time, the torsion spring 9 further releases some torque as the crank 7 rotates, and the eccentric shaft 4 rotates synchronously with the crank 7. Due to its eccentric characteristics, the drum door 2 is lifted upward, and the sealing strip 5 is disengaged from the door frame 1.

[0046] The piston rod of cylinder 6 continues to retract, and connecting rod 8 and crank 7 drive the entire drum door 2 to move to the right along the guide rail. Roller 3 rolls within the guide rail until the drum door 2 is completely removed from the opening range of door frame 1. At this point, the solenoid valve closes, cylinder 6 stops operating, and the door is opened. During this process, the preload of torsion spring 9 keeps crank 7 at a specific angle, ensuring that the drum door 2 is always in an elevated state, preventing the sealing strip 5 from rubbing against door frame 1.

[0047] Closing process:

[0048] In the initial state, the drum 2 is in the open position, the piston rod of the cylinder 6 is in the retracted state, and the crank 7 is held in the position that raises the drum 2 under the action of the torsion spring 9.

[0049] When the door needs to be closed, the solenoid valve is switched, and compressed gas enters the rodless chamber of cylinder 6, pushing the piston rod to extend. This pushes the connecting rod 8 and crank 7 to move the drum door 2 to the left along the guide rail. Due to the action of the torsion spring 9, the crank 7 does not rotate, and the drum door 2 remains in the raised state, with the sealing strip 5 remaining detached from the door frame 1.

[0050] When the drum 2 moves to the left and its left edge contacts the limiting block 10, it stops moving. The piston rod of the cylinder 6 continues to extend, and the connecting rod 8 applies a thrust to the crank 7, causing the crank 7 to rotate clockwise against the torque of the torsion spring 9, which in turn drives the eccentric shaft 4 to rotate synchronously.

[0051] During the rotation of the eccentric shaft 4, its eccentric structure causes the drum door 2 to gradually descend until the sealing strip 5 on the lower end face of the drum door 2 is tightly pressed against the bottom edge of the door frame 1. The solenoid valve closes, the cylinder 6 stops operating, and the door is closed and sealed.

[0052] Through the coordinated operation of the above-mentioned components, the automatic horizontal door of the leather tanning drum in this embodiment can realize the automatic opening, closing and sealing of the drum door 2 without manual intervention, effectively improving the automation level of the drum.

Claims

1. A leather tanning drum horizontal automatic door comprising a door frame (1), a drum door (2), a roller (3), an eccentric shaft (4) and a sealing strip (5), the roller (3) is installed on the drum door (2) and matched with a guide rail on the door frame (1), the sealing strip (5) is arranged below the drum door (2), and the eccentric shaft (4) is installed on the drum door (2), characterized in that: It also includes a drive assembly, a transmission assembly, an elastic element and a limiting element; the drive assembly is installed on the door frame (1), the transmission assembly is connected to the drive assembly and the eccentric shaft (4) respectively, the elastic element is sleeved on the eccentric shaft (4) and cooperates with the transmission assembly and the drum door (2) respectively, and the limiting element is installed on the door frame (1) to limit the movement of the drum door (2).

2. The leather tanning drum horizontal automatic door according to claim 1, characterized in that: The drive assembly includes a cylinder (6) mounted on the side of the door frame (1).

3. The leather tanning drum horizontal automatic door according to claim 2, characterized in that: The number of cylinders (6) is two, which are installed on the upper and lower sides of the door frame (1) respectively.

4. The leather tanning drum horizontal automatic door according to claim 2, characterized in that: The cylinder (6) is fixed to the bracket on the side of the door frame (1) by a mounting seat.

5. The automatic horizontal door for leather tanning drums according to claim 1, characterized in that: The transmission assembly includes a crank (7) and a connecting rod (8). One end of the connecting rod (8) is connected to the drive assembly, and the other end of the connecting rod (8) is connected to one end of the crank (7). The other end of the crank (7) is connected to the eccentric shaft (4).

6. The leather tanning drum horizontal automatic door according to claim 5, characterized in that: The number of cranks (7) and connecting rods (8) corresponds one-to-one with the number of drive components.

7. The leather tanning drum horizontal automatic door according to claim 5, characterized in that: One end of the connecting rod (8) is hinged to the piston rod of the drive assembly.

8. The leather tanning drum horizontal automatic door according to claim 5, characterized in that: The other end of the connecting rod (8) is hinged to one end of the crank (7), and the other end of the crank (7) is connected to the eccentric shaft (4).

9. The leather tanning drum horizontal automatic door according to claim 1, characterized in that: The elastic element is a torsion spring (9), which is sleeved on the eccentric shaft (4). One end of the torsion spring (9) is connected to the transmission assembly, and the other end is connected to the drum (2).

10. The leather tanning drum horizontal automatic door according to claim 1, characterized in that: The limiting component is a limiting block (10), which is installed at the end of the door frame (1) to limit the movement of the drum door (2).

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