A pressure roller adjusting mechanism for a carton slotter

Abstract

The application discloses a pressure wheel adjusting mechanism of a carton slotting machine and belongs to the technical field of carton processing equipment. The mechanism comprises a push plate, a pre-pressing wheel assembly, a forming press wheel assembly and a cutter assembly arranged on the push plate. The pre-pressing wheel assembly and the forming press wheel assembly are connected to the push plate through adjusting assemblies respectively. The adjusting assembly comprises a rocker arm, an eccentric wheel, a transmission wheel and a power wheel. The eccentric wheel is coaxially installed with the transmission wheel, one end of the rocker arm is matched with the outer edge of the eccentric wheel, and the other end is hingedly connected with the press wheel assembly. The power wheel is engaged with the transmission wheel and is driven by a motor. During work, the motor drives the eccentric wheel to rotate, the circular motion of the eccentric wheel is converted into the accurate lifting motion of the press wheel through the rocker arm, so that the depth of the pressure mark is adjusted. The application adopts mechanical linkage adjustment, has the advantages of high adjusting precision, stable transmission and compact structure, and solves the problems of low precision, slow response and poor synchronism of traditional pneumatic or direct driving modes.

Description

Technical Field

[0001] This invention relates to the field of cardboard box processing technology, and in particular to a pressure roller adjustment mechanism for a cardboard box slotting machine. Background Technology

[0002] In the carton production process, slotting and creasing are key processing steps. Traditional slotting equipment usually uses separate creasing and grooving devices, with the height adjusted by directly driving the pressure rollers or cutters through cylinders or motors. However, this adjustment method often suffers from problems such as low precision, slow response, complex structure, and large space occupation.

[0003] For example, a grooving device disclosed in existing patent publication number CN220429482U uses a first lifting mechanism and a second lifting mechanism to drive the grooving knife and the indentation wheel for height adjustment. Although this device achieves flexible adjustment of the grooving length, its adjustment mechanism relies on cylinders for lifting, and the adjustment accuracy is affected by the stability of air pressure. Furthermore, when multiple sets of pressure wheels work together, the synchronization is poor, making it difficult to meet the needs of high-precision carton processing.

[0004] Traditional grooving machines typically use a rotating shaft as a support. The shaft's core has poor rigidity, making it difficult to control the accuracy and depth of the indentation during operation, resulting in inconsistent indentation depth. In addition, in traditional devices, the pressure roller and drive components are often rigidly connected or have simple gear transmission. Adjusting the height of the pressure roller can easily lead to transmission failure or poor meshing, affecting processing quality and equipment reliability.

[0005] Therefore, it is necessary to provide a pressure roller adjustment mechanism with high adjustment accuracy, stable transmission, and compact structure to adapt to high-speed and high-precision carton slotting processing. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the purpose of this invention is to provide a pressure roller adjustment mechanism for a carton slotting machine to solve the problems of low pressure roller adjustment accuracy, unstable transmission, and poor synchronization.

[0007] A pressure roller adjustment mechanism for a carton slotting machine includes a push plate vertically mounted on the slotting machine frame, and a pre-pressure roller assembly, a forming pressure roller assembly, and a cutter assembly disposed on the push plate; the pre-pressure roller assembly and the forming pressure roller assembly are respectively connected to the push plate through two sets of adjustment assemblies with identical structures; The adjustment assembly includes a rocker arm, an eccentric wheel, a transmission wheel, and a power wheel; the eccentric wheel and the transmission wheel are coaxially connected and rotatably mounted on the push plate; one end of the rocker arm engages with the outer edge of the eccentric wheel, and the other end is hinged to the corresponding pressure wheel assembly; the power wheel is rotatably mounted on the push plate and meshes with the transmission wheel for transmission.

[0008] In this invention, the pressure roller assembly includes a connecting shaft, a pressure roller, and a pressure gear; the connecting shaft is rotatably mounted on the end of the rocker arm via a bearing; the pressure roller is fixed to one end of the connecting shaft, and the pressure gear is fixed to the other end of the connecting shaft.

[0009] Furthermore, the tool assembly includes two sets of tool slot seats, each tool slot seat having a mounting portion for mounting a grooving tool, and a grooving gear on its back side; the grooving gear engages with a corresponding pressure gear via an intermediate gear.

[0010] Furthermore, a connecting arm is provided between the intermediate gear and the pressure gear; one end of the connecting arm is rotatably sleeved on the gear shaft of the intermediate gear, and the other end is rotatably sleeved on the connecting shaft of the corresponding pressure roller assembly.

[0011] In this invention, the eccentric wheel is rotatably mounted on the push plate via a fixed shaft, and its center is offset from the center of the fixed shaft by a certain distance.

[0012] In this invention, the number of teeth on the power wheel is less than the number of teeth on the transmission wheel.

[0013] Furthermore, the surface of the pressure roller in the pre-pressure roller assembly is provided with shallow embossing or an arc surface, and the surface of the pressure roller in the forming pressure roller assembly is provided with indentation protrusions.

[0014] In this invention, the eccentric wheel includes an integrally formed connecting part and a rotating part; the connecting part is coaxially and fixedly connected to the transmission wheel; one end of the rocker arm is sleeved on the rotating part, and the center of the rotating part is offset from the rotation axis of the eccentric wheel.

[0015] Furthermore, the transmission wheel has a connecting cavity on the side facing the eccentric wheel, and the connecting cavity is used to accommodate the connecting part of the eccentric wheel.

[0016] Furthermore, the transmission wheel is provided with a connection hole for connecting with the connection part of the eccentric wheel, and the connection hole is at least three arc-shaped holes extending arc-shaped around the axis of the transmission wheel.

[0017] The beneficial effects of this invention are: The pressure roller adjustment mechanism of this invention replaces the traditional cylinder or direct motor drive method with a precision mechanical linkage system composed of a motor-driven gear and an eccentric wheel. It accurately converts the rotation angle of the motor into the linear lifting and lowering displacement of the pressure roller, realizing high-precision, digital adjustment of the indentation depth. At the same time, the connecting arm and meshing gear system ensure the continuity and stability of the transmission chain when the height of the pressure roller changes, avoiding transmission failure. The entire mechanism is integrated on the push plate, with a compact structure, fast response, and good synchronization. It effectively overcomes the defects of traditional equipment such as low adjustment accuracy, poor stability, complex structure, and large space occupation, meeting the needs of high-speed, high-precision carton slotting processing. In addition, this structure does not rely on a rotating shaft for pressure support for indentation, so there will be no inconsistency in indentation depth, optimizing the indentation effect, facilitating box bending, and improving the pass rate of subsequent gluing processes. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a perspective view of the pressure roller adjustment mechanism in this embodiment; Figure 2 This is a front view of the pressure roller adjustment mechanism in this embodiment; Figure 3 This is a rear view of the pressure roller adjustment mechanism in this embodiment; Figure 4 This is a schematic diagram of the adjustment component in this embodiment; Figure 5 This is a schematic diagram of the connecting arm in this embodiment; Figure 6 This is a schematic diagram of the eccentric wheel and the transmission wheel in this embodiment; The attached figures are labeled as follows: 1-Push plate; 2-Pre-pressure roller assembly; 21-Pre-pressure roller; 22-Pre-pressure gear; 23-Connecting shaft; 3-Forming roller assembly; 31-Forming roller; 32-Forming gear; 4-Cut tool assembly; 41-Cut groove seat; 42-Cut tool gear; 5-Adjusting assembly; 51-Rocker arm; 52-Eccentric wheel; 521-Connecting part; 522-Rotating part; 53-Transmission wheel; 531-Connecting cavity; 532-Connecting hole; 54-Power wheel; 55-Fixed shaft; 6-Intermediate gear; 61-Gear shaft; 7-Connecting arm. Detailed Implementation

[0019] This invention provides a pressure roller adjustment mechanism for a carton slotting machine. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention.

[0020] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0021] Please see Figures 1 to 6 : This embodiment discloses a pressure roller adjustment mechanism for a carton slotting machine, including a push plate 1 vertically mounted on the slotting machine frame. A pre-pressure roller assembly 2, a cutter assembly 4, and a forming pressure roller assembly 3 are sequentially arranged on the push plate 1 along the paperboard traveling direction. The pre-pressure roller assembly 2 and the forming pressure roller assembly 3 are respectively connected to the push plate 1 through two sets of adjustment components 5 with identical structures and symmetrical arrangement. The adjustment components 5 are used to independently adjust the height of the corresponding pressure roller assembly. The cutter assembly 4 is disposed between the pre-pressure roller assembly 2 and the forming pressure roller assembly 3.

[0022] The adjustment assembly 5 includes a rocker arm 51, an eccentric wheel 52, a transmission wheel 53, and a power wheel 54. The eccentric wheel 52 and the transmission wheel 53 are coaxially connected and rotatably mounted on the push plate 1. One end of the rocker arm 51 engages with the outer edge of the eccentric wheel 52, and the other end is hinged to the corresponding pre-pressure wheel assembly 2 or forming pressure wheel assembly 3. The power wheel 54 is rotatably mounted on the push plate 1 and meshes with the transmission wheel 53 for transmission. The center of the power wheel 54 is provided with a spline hole for connecting to the output shaft of the drive motor.

[0023] Both the pre-pressing roller assembly 2 and the forming roller assembly 3 include a connecting shaft 23, a creasing roller, and a creasing gear. In the pre-pressing roller assembly 2, these are referred to as the pre-creasing roller 21 and the pre-creasing gear 22, and in the forming roller assembly 3, they are referred to as the forming creasing roller 31 and the forming creasing gear 32. The connecting shaft 23 is rotatably mounted on the end of the rocker arm 51 via a bearing. The creasing roller is fixed to one end of the connecting shaft 23 and is used to creasing the cardboard. The creasing gear is fixed to the other end of the connecting shaft 23 and is used to transmit power.

[0024] The tool assembly 4 includes two sets of tool slot seats 41, which are located inside the pre-pressing roller 21 and the forming pressing roller 31, respectively. The tool slot seat 41 is provided with a mounting part for mounting the grooving tool, and a grooving gear 42 is provided on its back. The grooving gear 42 is meshed with the corresponding pressing gear through an intermediate gear 6 so that the tool slot seat 41 and the corresponding pressing roller rotate synchronously.

[0025] Furthermore, the intermediate gear 6 is rotatably mounted on the push plate 1 via a gear shaft 61; a connecting arm 7 is also provided between the intermediate gear 6 and the pressure gear, one end of the connecting arm 7 is rotatably sleeved on the gear shaft 61 of the intermediate gear 6, and the other end is rotatably sleeved on the connecting shaft 23 of the corresponding pressure roller assembly, so as to ensure that the intermediate gear 6 always maintains a meshing state with the pressure gear when adjusting the height of the pressure roller.

[0026] Furthermore, such as Figure 4 As shown, the eccentric wheel 52 is rotatably mounted on the push plate 1 via a fixed shaft 55 and a pressure cap. When the drive motor drives the power wheel 54 to rotate, the transmission wheel 53 rotates synchronously with the eccentric wheel 52. Specifically, as... Figure 6 As shown, the eccentric wheel 52 comprises an integrally formed connecting part 521 and a rotating part 522 with a through hole in the middle. The through hole in the middle is used to rotatably mount the eccentric wheel 55. The connecting part 521 is coaxially and fixedly connected to the transmission wheel 53. The center of the rotating part 522 is offset from the axis of the fixed shaft 55, and the rocker arm 51 is rotatably mounted on the rotating part 522. Since the center of the rotating part 522 is offset from the center of the fixed shaft 55 by a certain distance (eccentricity e), its outer edge pushes the upper end of the rocker arm 51 to make a circular motion, forcing the rocker arm 51 to swing with the lower hinge point as the fulcrum, thereby driving the pressing wheel to move up and down in the vertical direction. The relationship between the adjustment height h and the rotation angle θ of the eccentric wheel 52 is approximately: h≈e·(1 The depth of the indentation can be precisely controlled by controlling the rotation angle of the motor (cosθ).

[0027] Furthermore, the number of teeth on the drive wheel 54 is less than the number of teeth on the transmission wheel 53, forming a reduction and torque-increasing transmission pair to improve the adjustment torque and accuracy. Additionally, as... Figure 6As shown, the transmission wheel 53 also has a connecting cavity 531 on the side facing the eccentric wheel 52. The connecting cavity 531 is used to cover the connecting part 521 of the eccentric wheel 52. The depth of the connecting cavity 531 is 3 / 5 to 4 / 5 of the thickness of the connecting part 521. By setting the connecting cavity 531, the axial distance between the transmission wheel 53 and the rotating part 522 of the eccentric wheel 52 can be reduced, thereby reducing the lever arm length and avoiding an excessively long lever arm that would increase the burden on the fastener. Furthermore, the transmission wheel 53 also has connecting holes 532 for connecting with the connecting part 521. The connecting holes 532 are at least three arc-shaped holes extending in an arc around the axis of the transmission wheel 53. The fastener passes through the arc-shaped connecting holes 532 and is then fastened to the connecting part 521. In this way, when the transmission wheel 53 rotates, it will rotate a certain distance relative to the eccentric wheel 52 before it can drive the eccentric wheel 52 to rotate. This distance is the arc length of the connecting hole 532. This setting is used during the debugging phase to optimize the pressing timing and stroke curve of the creasing wheel by adjusting the relative position of the eccentric wheel 52 and the transmission wheel 53, so as to better match it with the paperboard travel speed and the knife action, thereby improving the quality of slotting and creasing.

[0028] Furthermore, the surface of the pre-pressing roller 21 in the pre-pressing roller assembly 2 is provided with shallow embossing or arc surface, which is used to pre-press the crease position of the cardboard; the surface of the forming crease roller 31 in the forming roller assembly 3 is provided with crease protrusion matching the final crease, which is used to accurately press out the crease.

[0029] Furthermore, the tool slot seat 41 is provided with a spline seat for direct connection to the spline output shaft of the drive motor; or, the tool slot seat 41 is connected to an external transmission shaft through a spline sleeve to realize the active rotation drive of the tool.

[0030] The working process of this invention is as follows: The cardboard first passes through the pre-pressing roller assembly 2, where the pre-pressing roller 21 initially presses the cardboard at the crease position; then the cardboard enters the area of ​​the cutting tool assembly 4, where the grooving tool cuts grooves on the cardboard; finally, the cardboard passes through the forming pressure roller assembly 3, where the forming crease roller 31 precisely presses out creases at the grooved position.

[0031] When the indentation depth needs adjustment, the drive motor drives the power wheel 54 to rotate via the splined shaft. The power wheel 54 drives the transmission wheel 53 and the eccentric wheel 52 to rotate synchronously. The eccentric motion of the eccentric wheel 52 is converted into linear movement of the pressure roller assembly in the vertical direction through the rocker arm 51, thereby achieving precise adjustment of the pressure roller height. Due to the use of a gear transmission and crank-connecting rod combination mechanism, the adjustment process is smooth and highly accurate, and different adjustment ranges can be achieved by replacing the eccentric wheel 52 with different eccentricities.

[0032] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of the present invention.

Claims

1. A pressure roller adjustment mechanism for a carton slotting machine, characterized in that, It includes a push plate vertically mounted on the frame of the grooving machine, and a pre-pressure roller assembly, a forming pressure roller assembly, and a cutter assembly set on the push plate; the pre-pressure roller assembly and the forming pressure roller assembly are respectively connected to the push plate through two sets of adjustment assemblies with identical structures; The adjustment assembly includes a rocker arm, an eccentric wheel, a transmission wheel, and a power wheel; the eccentric wheel and the transmission wheel are coaxially connected and rotatably mounted on the push plate; one end of the rocker arm engages with the outer edge of the eccentric wheel, and the other end is hinged to the corresponding pressure wheel assembly; the power wheel is rotatably mounted on the push plate and meshes with the transmission wheel for transmission.

2. The pressure roller adjusting mechanism according to claim 1, characterized in that, The pressure roller assembly includes a connecting shaft, a pressure roller, and a pressure gear; the connecting shaft is rotatably mounted on the end of the rocker arm via a bearing; the pressure roller is fixed to one end of the connecting shaft, and the pressure gear is fixed to the other end of the connecting shaft.

3. The pressure roller adjusting mechanism according to claim 2, characterized in that, The tool assembly includes two sets of tool slot seats, each with a mounting portion for mounting a grooving tool and a grooving gear on its back; the grooving gear engages with a corresponding pressure gear via an intermediate gear.

4. The pressure roller adjusting mechanism according to claim 3, characterized in that, A connecting arm is provided between the intermediate gear and the pressure gear; one end of the connecting arm is rotatably sleeved on the gear shaft of the intermediate gear, and the other end is rotatably sleeved on the connecting shaft of the corresponding pressure roller assembly.

5. The pressure roller adjusting mechanism according to claim 1, characterized in that, The eccentric wheel is rotatably mounted on the push plate via a fixed shaft, and its center is offset from the center of the fixed shaft by a certain distance.

6. The pressure roller adjusting mechanism according to claim 1, characterized in that, The number of teeth on the drive wheel is less than the number of teeth on the transmission wheel.

7. The pressure roller adjusting mechanism according to claim 2, characterized in that, The surface of the pressure roller in the pre-pressure roller assembly is provided with shallow embossing or a rounded surface, and the surface of the pressure roller in the forming pressure roller assembly is provided with indentation protrusions.

8. The pressure roller adjusting mechanism according to claim 1, characterized in that, The eccentric wheel includes an integrally formed connecting part and a rotating part; the connecting part is coaxially and fixedly connected to the transmission wheel; one end of the rocker arm is sleeved on the rotating part, and the center of the rotating part is offset from the rotation axis of the eccentric wheel.

9. The pressure roller adjusting mechanism according to claim 8, characterized in that, The transmission wheel has a connecting cavity on the side facing the eccentric wheel, and the connecting cavity is used to accommodate the connecting part of the eccentric wheel.

10. The pressure roller adjusting mechanism according to claim 9, characterized in that, The transmission wheel is provided with a connection hole for connecting with the connection part of the eccentric wheel. The connection hole is at least three arc-shaped holes that extend in an arc around the axis of the transmission wheel.

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