Height adjustment device and pre-sealing machine

Abstract

The utility model provides a kind of height adjusting device and pre-sealing machine, it is related to product pre-sealing technical field, above-mentioned height adjusting device includes support frame, driving assembly, driven assembly, transmission part, enter jar rack and jar rack;Driving assembly and driven assembly are rotatably installed in support frame, transmission part is located above support frame and is transmissionally connected between driving assembly and driven assembly, for making driving assembly and driven assembly synchronous rotation;Enter jar rack is located below support frame and is transmissionally connected with driving assembly, driving assembly is used to drive enter jar rack to do lifting motion;Jar rack is located below support frame and is transmissionally connected with driven assembly, the bottom surface of jar rack is flush with the bottom surface of enter jar rack, driven assembly is used to drive jar rack to do lifting motion with enter jar rack synchronously. Above-mentioned height adjusting device can ensure that the height of enter jar, jar rack is more accurate matching, levelness is consistent, guarantees product quality, reduces the rate of defective product and production cost.

Description

Technical Field

[0001] This utility model relates to the field of pre-sealing technology for hearing products, and in particular to a height adjustment device and a pre-sealing machine. Background Technology

[0002] In the production process of pre-sealing machines, when it is necessary to switch product specifications (different specifications correspond to different height requirements), the height of the frame needs to be adjusted to match the product. Currently, the common practice in the industry is for operators to adjust the height of the frame at a single point. However, this single-point adjustment method has obvious drawbacks: because force is applied to adjust only a single point, it is difficult to ensure the overall levelness of the frame. If the adjustment is not done properly, the various parts of the frame will not be on the same horizontal plane.

[0003] When the machine frame becomes unbalanced, the stability of the equipment operation will be severely impacted, leading to frequent malfunctions and shutdowns. In extreme cases, it may even cause the equipment to malfunction completely. Furthermore, if the height adjustment of the inlet and outlet frames is mismatched, it can further cause mismatch issues between the pre-sealed cans (the components that carry the product in the pre-sealing process) and the bottom caps, resulting in caps falling off or cans getting stuck. These equipment malfunctions will ultimately affect the product end, causing scratches, dents, and other damage during the production process. This significantly slows down the production pace, reduces production efficiency, and seriously affects product quality, increasing the defect rate and production costs. Utility Model Content

[0004] The purpose of this invention is to provide a height adjustment device that ensures more precise matching and consistent levelness of the height of the can-in and can-out racks, thereby guaranteeing product quality and reducing defect rates and production costs. Additionally, a pre-sealing machine incorporating the aforementioned height adjustment device is also provided.

[0005] To achieve the above objectives, this utility model provides the following technical solution: In a first aspect, this utility model provides a height adjustment device, including a support frame, an active component, a driven component, a transmission component, an inlet frame, and an outlet frame; Both the active component and the driven component are rotatably mounted on the support frame. The transmission component is located above the support frame and is drively connected between the active component and the driven component, so as to make the active component and the driven component rotate synchronously. The can-discharging frame is located below the support frame and is connected to the drive component for transmission. The drive component is used to drive the can-discharging frame to perform lifting and lowering movements. The can-feeding frame is located below the support frame and is connected to the driven component for transmission. The bottom surface of the can-feeding frame is flush with the bottom surface of the can-discharging frame. The driven component is used to drive the can-feeding frame to perform a lifting and lowering movement synchronously with the can-discharging frame.

[0006] In an optional implementation, the active component includes a handwheel, a drive wheel, and a first lead screw; The first lead screw is rotatably connected to the support frame; The can-dispensing frame is threadedly engaged with the first lead screw, and the can-dispensing frame is slidably engaged with the support frame in the vertical direction; The drive wheel is located above the support frame, and both the drive wheel and the handwheel are fixedly connected to the first lead screw.

[0007] In an optional embodiment, the driven assembly includes a first driven wheel, a second driven wheel, a second lead screw, and a third lead screw; Both the second lead screw and the third lead screw are rotatably connected to the support frame; The can-feeding frame is threadedly fitted to the second lead screw and the third lead screw; The first driven wheel is located above the support frame and is fixedly connected to the second lead screw, and the second driven wheel is located above the support frame and is fixedly connected to the third lead screw.

[0008] In an optional embodiment, a first guide assembly is sleeved on the outside of both the second lead screw and the third lead screw. The first guide assembly includes a first guide structure and a second guide structure that slides in cooperation with the first guide structure in the vertical direction. The second guide structure is connected to the inlet frame and has a scale in the vertical direction. The first guide structure is connected to the support frame and has a pointer that aligns with the scale.

[0009] In an optional embodiment, the transmission component includes a belt connecting the driving component and the driven component.

[0010] In an optional embodiment, the height adjustment device further includes a tensioning mechanism, which includes a tensioning wheel and an operating component. The tensioning wheel is slidably engaged with the support frame and abuts against the transmission member. The operating component is connected between the support frame and the tensioning wheel to adjust the position of the tensioning wheel relative to the support frame.

[0011] In an optional embodiment, the tensioning mechanism further includes a pressure sensor connected to the tensioning wheel or the operating component, the pressure sensor being used to detect the thrust information given to the tensioning wheel by the transmission component.

[0012] In an optional embodiment, the operating component includes a drive connected between the support frame and the tension wheel, and the height adjustment device further includes a controller. Both the drive and the pressure sensor are connected to the controller, which controls the operation of the drive based on the thrust information.

[0013] In an optional embodiment, the can-in frame and the can-out frame are equipped with sensor assemblies for detecting the height of the bottom surface of the can-in frame and the bottom surface of the can-out frame.

[0014] Secondly, this utility model provides a pre-sealing machine, including a height adjustment device as described in any of the foregoing embodiments.

[0015] The height adjustment device and pre-sealing machine provided by this utility model can produce the following beneficial effects: When the height adjustment device provided in the first aspect of this utility model is in use, the active component is rotated, which drives the can-discharging frame to move up and down. At the same time, the driven component rotates synchronously with the active component under the drive of the transmission component above the support frame, and the driven component drives the can-in frame to move up and down synchronously with the can-discharging frame.

[0016] Compared with the prior art, the height adjustment device provided by the first aspect of this utility model can ensure that the can-out machine frame and the can-in machine frame under the support frame move up and down synchronously, ensuring that the height of the can-in and can-out machine frames is more accurately matched and the level is consistent, solving the problem of "poor single-point adjustment accuracy and high coordination difficulty", ensuring product quality, and reducing the defect rate and production cost.

[0017] The pre-sealing machine provided in the second aspect of this utility model has the height adjustment device provided in the first aspect of this utility model, and thus has all the beneficial effects of the height adjustment device provided in the first aspect of this utility model. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 Right side view of the height adjustment device provided in this embodiment of the utility model; Figure 2 A left-side view of the height adjustment device provided in an embodiment of this utility model; Figure 3 A top view of the height adjustment device provided in an embodiment of this utility model; Figure 4 A block diagram illustrating the control principle of the height adjustment device provided in this embodiment of the utility model.

[0020] Icons: 1-Support frame; 11-Third guide structure; 2-Active component; 21-Handwheel; 22-Drive wheel; 23-First lead screw; 3-Driven component; 31-First driven wheel; 32-Second driven wheel; 33-Second lead screw; 34-Third lead screw; 4-Transmission component; 5-Inlet frame; 6-Outlet frame; 61-Fourth guide structure; 7-First guide component; 71-First guide structure; 711-Pointer; 72-Second guide structure; 721-Scale; 8-Tensioning mechanism; 81-Tensioning wheel; 82-Operating component; 821-Driver; 83-Pressure sensor; 9-Controller; 10-Sensor assembly; 101-First sensor; 102-Second sensor. Detailed Implementation

[0021] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. 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.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0025] The first aspect of this utility model provides a height adjustment device, such as... Figure 1 and Figure 2 As shown, it includes a support frame 1, an active component 2, a driven component 3, a transmission component 4, an inlet frame 5, and an outlet frame 6; Both the active component 2 and the driven component 3 are rotatably mounted on the support frame 1. The transmission component 4 is located above the support frame 1 and is connected to the active component 2 and the driven component 3 for synchronous rotation. The can-discharging frame 6 is located below the support frame 1 and is connected to the drive component 2 for transmission. The drive component 2 is used to drive the can-discharging frame 6 to perform lifting and lowering movements. The inlet frame 5 is located below the support frame 1 and is connected to the driven component 3. The bottom surface of the inlet frame 5 is flush with the bottom surface of the outlet frame 6. The driven component 3 is used to drive the inlet frame 5 to make a lifting and lowering motion synchronized with the outlet frame 6.

[0026] When in use, rotating the active component 2 causes the can-discharging frame 6 to move up and down. At the same time, driven by the transmission component 4 above the support frame 1, the driven component 3 rotates synchronously with the active component 2, and the driven component 3 causes the can-in frame 5 to move up and down synchronously with the can-discharging frame 6.

[0027] The aforementioned height adjustment device ensures that the can-exit frame 6 and the can-in frame 5 below the support frame 1 move up and down synchronously, ensuring that the height of the can-in and can-exit frames is more accurately matched and the level is consistent. This solves the problems of "poor precision in single-point adjustment and difficulty in coordination", ensuring product quality and reducing the defect rate and production costs.

[0028] In alternative implementations, such as Figure 2 and Figure 3 As shown, the active component 2 includes a handwheel 21, an active wheel 22, and a first lead screw 23.

[0029] The first lead screw 23 is vertically oriented and rotatably mounted on the support frame 1 via a bearing structure, achieving a rotatable connection with the support frame 1. The can-dispensing frame 6 is provided with a threaded hole that matches the first lead screw 23, allowing the can-dispensing frame 6 to be threadedly fitted onto the first lead screw 23. Simultaneously, the can-dispensing frame 6 also slides vertically with the support frame 1 via a second guide component, such as a guide post or slide rail, thereby converting the rotational motion into axial linear lifting motion when the first lead screw 23 rotates, achieving precise height adjustment of the can-dispensing frame 6.

[0030] Among them, such as Figure 2 As shown, the second guide assembly includes a third guide structure 11 and a fourth guide structure 61 that slides in a vertical direction with the third guide structure 11. The fourth guide structure 61 is fixedly connected to the can-discharging frame 6, and the third guide structure 11 is fixedly connected to the support frame 1.

[0031] Specifically, the fourth guide structure 61 may include a slide rod, and the third guide structure 11 includes a guide sleeve, with the slide rod extending into the guide sleeve and slidingly engaging with it.

[0032] Furthermore, the drive wheel 22 is fixedly sleeved on the portion of the first lead screw 23 located above the support frame 1, and is coaxially fixedly connected to the first lead screw 23 to ensure synchronous rotation. The handwheel 21 is also fixedly connected to the top of the first lead screw 23. Operators can manually rotate the handwheel 21 to drive the first lead screw 23 to rotate, thereby raising and lowering the can-discharging frame 6. This manual adjustment method has advantages such as simple structure, intuitive operation, and high adjustment precision. Ordinary operators can learn to use it after simple training, solving the problem of "narrow personnel adaptability due to technical barriers."

[0033] Furthermore, the drive wheel 22, serving as the power input end of the transmission component 4, is connected to the driven component 3 via a belt, chain, or gear transmission method, forming a synchronous transmission system. When the handwheel 21 is rotated, the power is transmitted sequentially through the first lead screw 23, the drive wheel 22, and the transmission component 4 to the driven component 3, thereby driving the can-feeding frame 5 to rise and fall synchronously. This ensures that the can-feeding frame 5 and the can-discharging frame 6 always maintain a flush bottom surface and synchronized movement, effectively preventing lid drop and can jamming caused by height discrepancies.

[0034] In alternative implementations, such as Figures 1 to 3 As shown, the driven assembly 3 includes a first driven wheel 31, a second driven wheel 32, a second lead screw 33, and a third lead screw 34.

[0035] The second lead screw 33 and the third lead screw 34 are both vertically arranged and rotatably mounted on the support frame 1 through bearings, so as to achieve a rotatable connection with the support frame 1.

[0036] The can-feeding frame 5 is equipped with threaded holes or nut structures that match the second lead screw 33 and the third lead screw 34, so that the can-feeding frame 5 is connected to the second lead screw 33 and the third lead screw 34 through threaded engagement. While the second lead screw 33 and the third lead screw 34 are threadedly engaged with the can-feeding frame 5, they can also limit the rotation of the can-feeding frame 5. Thus, when the second lead screw 33 and the third lead screw 34 rotate, the can-feeding frame 5 can smoothly rise and fall in the vertical direction under the action of threaded transmission, and maintain a stable posture during the movement, avoiding deflection or jamming.

[0037] Furthermore, the first driven wheel 31 is fixedly sleeved on the upper end of the second lead screw 33 and located above the support frame 1; the second driven wheel 32 is fixedly sleeved on the upper end of the third lead screw 34, also located above the support frame 1. The first driven wheel 31 and the second driven wheel 32 are pulleys or gears, and they are circumferentially fixed to the second lead screw 33 and the third lead screw 34 by means of key connection, interference fit or welding, etc., to ensure reliable torque transmission.

[0038] During operation, the operator manually rotates the handwheel 21 to drive the drive wheel 22 to rotate. This rotation is transmitted to the first driven wheel 31 and the second driven wheel 32 via the transmission component 4, which in turn drives the second lead screw 33 and the third lead screw 34 to rotate synchronously. Since the can-feeding frame 5 and the two lead screws form a threaded transmission pair, the can-feeding frame 5 achieves smooth and synchronous lifting and lowering movements under the action of the synchronous rotation of the two lead screws.

[0039] The above-described embodiment employs a dual-screw (second screw 33 and third screw 34) drive structure, which, in conjunction with two driven wheels (first driven wheel 31 and second driven wheel 32), synchronously receives transmission power. This effectively improves the levelness maintenance capability and overall rigidity of the tank loading frame 5 during lifting and lowering, preventing tilting or swaying caused by single-point force. Furthermore, by positioning the driven wheels above the support frame 1 and linking them to the active component 2 via the transmission component 4, the power layout of the entire height adjustment device becomes more rational, facilitating maintenance and adjustment.

[0040] In an optional embodiment, the driving wheel 22, the first driven wheel 31, and the second driven wheel 32 are all pulleys. The outer surface of the pulley is provided with a first tooth structure. The transmission component 4 is a belt. The inner surface of the belt is provided with a second tooth structure that meshes with the tooth structure to ensure rotational stability.

[0041] Of course, the driving wheel 22, the first driven wheel 31 and the second driven wheel 32 can also be sprockets or gears, and the transmission component 4 can be a chain or transmission gear.

[0042] In alternative implementations, such as Figure 2 As shown, in order to improve the motion stability and height adjustment visualization accuracy of the inlet frame 5 during the lifting process, the second lead screw 33 and the third lead screw 34 are both equipped with a first guide component 7. The first guide component 7 is used to guide and limit the vertical lifting motion of the inlet frame 5, and at the same time provide an intuitive height position indication function.

[0043] like Figure 1 and Figure 2 As shown, the first guide assembly 7 includes a fixedly mounted first guide structure 71 and a slidable second guide structure 72. The first guide structure 71 can be a guide sleeve extending vertically, securely mounted to the support frame 1 by welding or bolting to ensure stable positioning and no deformation during use. The second guide structure 72 is slidably embedded inside the first guide structure 71, forming a linear sliding pair. Its sliding direction is parallel to the vertical axis to ensure guiding accuracy.

[0044] The lower end of the second guide structure 72 is fixedly connected to the can-feeding frame 5, so that when the can-feeding frame 5 is raised and lowered under the synchronous thread drive of the second lead screw 33 and the third lead screw 34, it can achieve smooth and non-deflection linear movement along the first guide structure 71. To further improve the intuitiveness of operation and adjustment accuracy, the side of the second guide structure 72 is provided with a scale 721 along its length. The scale 721 is uniformly marked in millimeters or other suitable units, covering the specification height range required for pre-sealing machine production (such as 10mm - 110mm, etc., depending on actual production needs), and can be used to read the specific height position of the can-feeding frame 5.

[0045] Correspondingly, a pointer 711 is provided on the outer surface of the first guide structure 71. The pointer 711 faces and is directly aligned with the scale 721 on the second guide structure 72. The scale 721 can be directly machined onto the surface of the second guide structure 72 by laser engraving or mechanical scribing, ensuring that it will not wear out or become blurred over long-term use. The pointer 711 can be a metal strip structure, fixed to the first guide structure 71 and remaining in the same position. When the can-feeding frame 5 moves up and down with the second guide structure 72, the operator can observe the value of the scale 721 pointed to by the pointer 711 to grasp the height position of the can-feeding frame 5 in real time, achieving precise height matching and leveling.

[0046] In summary, this guide assembly not only enhances the rigidity and straightness of the inlet frame 5 during its lifting and lowering process, but also achieves visualized and quantitative control of height adjustment through a "scale + pointer" design. This facilitates operators in quickly and accurately aligning the inlet frame 5 with the outlet frame 6, further improving the equipment's adjustment efficiency and operational consistency. Furthermore, because the first guide structure 71 and the second guide structure 72 are fitted onto the corresponding lead screws, the structure between the first guide assembly 7 and the driven assembly 3 is more compact.

[0047] In alternative implementations, such as Figure 2 and Figure 3 As shown, the height adjustment device also includes a tensioning mechanism 8, which is used to apply and adjust the preload to the transmission component 4 to ensure the transmission stability between the active component 2 and the driven component 3, and to prevent the synchronization accuracy from decreasing or the phenomenon of jumping or slipping caused by the loosening of the transmission component 4.

[0048] The tensioning mechanism 8 includes a tensioning wheel 81 and an operating component 82. The tensioning wheel 81 includes a wheel body and a sliding seat. The wheel body is rotatably mounted on the sliding seat via a rotating shaft. The sliding seat is slidably engaged with the support frame 1, allowing the wheel body to move relative to the support frame 1 in a set direction. Specifically, the wheel body is located above the support frame 1 and abuts against the outer surface of the transmission component 4, thereby applying external pressure to tension the transmission component 4.

[0049] The operating component 82 is connected between the support frame 1 and the tension wheel 81, and is used to drive or adjust the relative position of the tension wheel 81 on the support frame 1, thereby controlling the pressure it exerts on the transmission component 4.

[0050] In an optional embodiment, the operating component 82 includes an adjusting screw that passes through a mounting hole in the support frame 1 and is threadedly connected to the support frame 1; one end of the adjusting screw is connected to a sliding seat, and the other end protrudes from the support frame 1 for manual adjustment. By rotating the adjusting screw, the tension wheel 81 can be pushed or pulled back, changing its depth into the transmission path.

[0051] Furthermore, the support frame 1 is provided with a guide structure to guide the tensioning wheel 81 to slide smoothly in a direction that is conducive to the application of tension force, so as to avoid jamming or uneven loading.

[0052] In an optional embodiment, the tensioning mechanism 8 further includes a pressure sensor 83, which is connected to the tensioning wheel 81 or the operating component 82. The pressure sensor 83 is used to detect the thrust information given by the tensioning wheel 81 to the transmission component 4.

[0053] Specifically, the pressure sensor 83 can be fixedly connected to the end of the shaft of the tensioning wheel 81 or to the sliding seat, and indirectly contact the transmission component 4 to sense the pressure it receives. When the tensioning wheel 81 applies a radial thrust to the transmission component 4, the thrust is mechanically transmitted to the pressure sensor 83, causing it to generate a corresponding electrical signal output.

[0054] In an optional embodiment, the operating component 82 can also be automatically adjusted. The operating component 82 includes a driver 821, which is connected between the support frame 1 and the tension wheel 81. The driver 821 is used to adjust the position of the tension wheel 81 relative to the support frame 1, thereby changing the amount of pressure it applies to the transmission component 4.

[0055] The driver 821 can be an actuator capable of precise displacement control, such as an electric linear actuator, pneumatic cylinder, hydraulic cylinder, or stepper motor with a lead screw mechanism. The movement of the driver 821 drives the tension wheel 81 to slide, thereby achieving automatic adjustment of the tension force.

[0056] In addition, such as Figure 4As shown, the height adjustment device also includes a controller 9, which is electrically connected to the driver 821 and the pressure sensor 83, forming a closed-loop control system. The controller 9 receives real-time thrust information from the pressure sensor 83 and compares this signal with a preset target tension threshold. If the actual thrust is detected to be lower than the set range, the controller 9 outputs a control command to start the driver 821, pushing the tension wheel 81 to move towards the transmission component 4 to increase the clamping force; conversely, if the thrust is too large, the controller 9 controls the driver 821 to retract, releasing part of the tension force to prevent the transmission component 4 from being over-tightened, which could lead to increased wear or increased running resistance.

[0057] The above implementation method can achieve dynamic tension compensation, ensuring that the belt maintains "no slippage and high-precision transmission" during long-term operation and under complex working conditions (such as workshop temperature changes and continuous high-frequency switching), thus extending the belt life.

[0058] In a preferred embodiment, the controller 9 is also equipped with an alarm module and a human-machine interface. When the pressure sensor 83 continuously detects abnormal fluctuations in tension or exceeds the safe range, the controller 9 can prompt the user to perform maintenance through audible and visual alarms, and at the same time display the current tension status and suggested operations on the operation interface.

[0059] In an optional embodiment, the inlet frame 5 and the outlet frame 6 are equipped with sensor assemblies 10, which are used to detect the height of the bottom surface of the inlet frame 5 and the bottom surface of the outlet frame 6.

[0060] Specifically, the sensor assembly 10 includes a first sensor 101 and a second sensor 102. The first sensor 101 is installed on the inlet frame 5 and is used to detect the height of the inlet frame 5, and the second sensor 102 is installed on the outlet frame 6 and is used to detect the height of the outlet frame 6.

[0061] The first sensor 101 and the second sensor 102 can be non-contact displacement sensors, such as laser displacement sensors or inductive displacement sensors, to ensure high measurement accuracy, fast response speed, and immunity to mechanical vibration interference. The sensor installation positions are calibrated to ensure that their probes are perpendicularly pointed to a fixed reference plane, such as the ground or the reference line of the equipment base, to obtain accurate vertical displacement data.

[0062] Specifically, the first sensor 101 and the second sensor 102 can communicate with the controller 9 via a signal transmission line, and transmit the collected height data synchronously to the digital display screen on the operation panel in real time. Operators can visually view the "actual height values" of the inlet frame 5 and the outlet frame 6 on this digital display screen. Optionally, the controller 9 automatically calculates the difference between the two, i.e., the "levelness deviation value." Compared to the traditional method of relying solely on rulers or pointers for manual visual judgment, this solution achieves digital and visual monitoring, significantly improving the accuracy and operability of the adjustment process.

[0063] Optionally, the system presets an allowable error threshold, such as 0.5mm. When the controller 9 determines that the levelness deviation exceeds the preset threshold, it immediately triggers an audible and visual alarm to alert the operator. At the same time, the control system can automatically lock the manual adjustment mechanism or issue a correction command to force readjustment until the deviation returns to the allowable range.

[0064] Through the above structural design, this embodiment not only realizes real-time and accurate detection of the height of the can inlet frame and the can outlet frame, but also constructs a closed-loop control mechanism of "detection-display-early warning-correction", compressing the height adjustment error from "±1mm of visual scale" to ±0.2mm, adapting to higher precision pre-sealing processes, and allowing "zero-experience personnel" to ensure adjustment accuracy.

[0065] The controller 9 mentioned above can be a microcontroller or a programmable logic controller.

[0066] The following specific embodiment illustrates the selection of various structures in the height adjustment device and its usage process: The height adjustment device is used in pre-sealing machines for the pre-sealing process of metal / tinplate cans such as infant formula cans and food cans. When changing product specifications (e.g., can height from 90mm to 130mm), adjust the height of the inlet frame 5 and the outlet frame 6 to ensure the pre-sealed can and bottom cover are compatible. Basic equipment parameters: The pre-sealing machine has a maximum load capacity of 500kg, and the adjustable height of the frame ranges from 50mm to 300mm (covering common can type requirements).

[0067] Core components and parameter configuration: 1. The diameter of the first driven wheel 31 and the second driven wheel 32 are both in the range of 8-12cm.

[0068] Example 1: The diameter of the first driven wheel 31 and the second driven wheel 32 is 8cm. The above value is the lower limit of the diameter, which is suitable for fine adjustment of small tanks. Example 2): The diameter of the first driven wheel 31 and the second driven wheel 32 is 10cm. The above value is the middle value of the diameter, which can balance the adaptability and transmission efficiency. Example 3: The diameter of the first driven wheel 31 and the second driven wheel 32 is 12cm. The above value is the upper limit of the diameter, which is suitable for large tank-type heavy-duty transmission.

[0069] The material can be 45# steel with surface carburizing treatment (hardness HRC50-55) to ensure wear resistance and transmission rigidity.

[0070] 2. The diameter of the drive wheel 22 ranges from 15 to 21 cm.

[0071] Example 1: The diameter of the driving wheel 22 is 15cm. The above value is the lower limit of the diameter. It is adapted to the first driven wheel 31 and the second driven wheel 32 with a diameter of 8cm. Example 2: The diameter of the driving wheel 22 is 18cm. The above value is the median value of the diameter, which is compatible with the first driven wheel 31 and the second driven wheel 32 with a diameter of 10cm. Example 3: The diameter of the driving wheel 22 is 21cm. The above value is the upper limit of the diameter. It is adapted to the first driven wheel 31 and the second driven wheel 32 with a diameter of 12cm.

[0072] The material can be 45# steel with surface carburizing treatment (hardness HRC50-55) to ensure wear resistance and transmission rigidity.

[0073] 3. The belt length ranges from 1.6 to 2.1 m.

[0074] Example 1: The belt is 1.6m long (the above value is the lower limit of the length, suitable for compact rack layouts). Example 2: The belt is 1.85m long. The above value is the median of the length, which is suitable for conventional rack layouts. Example 3: The belt is 2.1m long. The above value is the upper limit of the length, which is suitable for wide frame layouts.

[0075] 4. Selection of tensioning mechanism 8: It includes a spring-loaded automatic tensioning structure with a tension adjustment range of 50-200N (covering different belt lengths and load requirements).

[0076] 5. The value range of scale 721: The scale 721 has a range of 50mm-300mm (consistent with the adjustable height range of the frame), with a minimum scale accuracy of 1mm (to ensure precise adjustment).

[0077] 6. Material selection for pointer 711: The pointer 711 can be made of aluminum alloy and is rigidly connected to the frame lifting assembly, moving synchronously with the height adjustment.

[0078] 7. Material selection for handwheel 21: The handwheel 21 can be made of engineering plastic with a rubber coating (diameter can be 12cm) and equipped with a worm gear reduction structure (reduction ratio can be 1:20) to achieve "small force fine adjustment and precise control".

[0079] The implementation process and operation verification process of the above-mentioned height adjustment device are explained in detail using two specific embodiments: Example 1: The tank height is switched from 90mm to 130mm. In this first embodiment, the diameter of the first driven wheel 31 and the second driven wheel 32 is 8cm, the diameter of the driving wheel 22 is 15cm, and the length of the belt is 1.6m.

[0080] 1. Preparation stage: Confirm that the equipment is shut down and the pre-sealing machine is in a state of no tank and no operation; Check belt tension: Through the tensioner observation window, confirm that the tension value is 80N (tension value range is 50-200N) and that the belt is not loose or worn.

[0081] 2. Adjustment Phase: The operator turns handwheel 21 to drive the belt drive. Because the reduction ratio is 1:20, each turn of the handwheel adjusts the frame height by 5mm (the handwheel circumference is 37.7cm, one turn corresponds to a belt movement of 37.7cm, which is converted into frame lifting and lowering through gear reduction). The target height is 120mm, the current height is 80mm, and an adjustment of 40mm is needed, which means turning the handwheel 8 times. Observe the scale pointer: When pointer 711 moves from the 80mm mark to the 120mm mark, stop turning the handwheel.

[0082] 3. Verification Phase: Levelness inspection: A laser level is used to measure the horizontal deviation of the inlet and outlet frames. A deviation value ≤ 0.5mm meets the production requirements. No-load test run: Start the equipment and run it under no-load for 2 minutes. Check that the frame does not shake and the belt does not slip or make any abnormal noise. Confirm that the adjustment is effective.

[0083] Example 2: The tank height is switched from 120mm to 160mm. In this second embodiment, the diameter of the first driven wheel 31 and the second driven wheel 32 is 10cm, the diameter of the driving wheel 22 is 18cm, and the length of the belt is 1.85m.

[0084] 1. Preparation stage: The equipment was shut down, and the remaining tank body and waste were cleaned up. Check belt tension: tension value 120N, suitable for 1.85m belt, tension pulley spring compression is normal.

[0085] 2. Adjustment Phase: The target height difference is 40mm, and the handwheel is turned 8 times. Auxiliary verification: Simultaneously observe the digital display to confirm that the value jumps from 120mm to 160mm, matching the pointer.

[0086] 3. Verification Phase: Levelness test: The laser level showed a deviation of 0.3mm, which meets the requirements; Trial production under load: Ten 120mm can body simulation parts were put into use. The pre-sealed cans and bottom covers fit well, with no can jamming or lid falling off.

[0087] A second aspect of this utility model provides a pre-sealing machine, which includes the aforementioned height adjustment device.

[0088] The pre-sealing machine provided in the second aspect of this utility model has the height adjustment device provided in the first aspect of this utility model, thereby having all the beneficial effects of the height adjustment device provided in the first aspect of this utility model.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A height adjustment device, characterized in that, It includes a support frame (1), an active component (2), a driven component (3), a transmission component (4), an inlet frame (5), and an outlet frame (6). The active component (2) and the driven component (3) are both rotatably mounted on the support frame (1). The transmission component (4) is located above the support frame (1) and is connected to the active component (2) and the driven component (3) for synchronous rotation of the active component (2) and the driven component (3). The can-dispensing frame (6) is located below the support frame (1) and is connected to the active component (2) for transmission. The active component (2) is used to drive the can-dispensing frame (6) to perform lifting and lowering movements. The can-feeding frame (5) is located below the support frame (1) and is connected to the driven component (3) for transmission. The bottom surface of the can-feeding frame (5) is flush with the bottom surface of the can-discharging frame (6). The driven component (3) is used to drive the can-feeding frame (5) to make a lifting and lowering movement synchronous with the can-discharging frame (6).

2. The height adjustment device according to claim 1, characterized in that, The active component (2) includes a handwheel (21), an active wheel (22), and a first lead screw (23); The first lead screw (23) is rotatably connected to the support frame (1); The can-dispensing frame (6) is threadedly engaged with the first lead screw (23), and the can-dispensing frame (6) is slidably engaged with the support frame (1) in the vertical direction; The drive wheel (22) is located above the support frame (1), and both the drive wheel (22) and the handwheel (21) are fixedly connected to the first lead screw (23).

3. The height adjustment device according to claim 1, characterized in that, The driven assembly (3) includes a first driven wheel (31), a second driven wheel (32), a second lead screw (33), and a third lead screw (34). The second lead screw (33) and the third lead screw (34) are both rotatably connected to the support frame (1); The can-feeding frame (5) is threadedly fitted to the second lead screw (33) and the third lead screw (34). The first driven wheel (31) is located above the support frame (1) and is fixedly connected to the second lead screw (33), and the second driven wheel (32) is located above the support frame (1) and is fixedly connected to the third lead screw (34).

4. The height adjustment device according to claim 3, characterized in that, The second lead screw (33) and the third lead screw (34) are both fitted with a first guide assembly (7). The first guide assembly (7) includes a first guide structure (71) and a second guide structure (72) that slides in the vertical direction with the first guide structure (71). The second guide structure (72) is connected to the inlet frame (5) and has a scale (721) in the vertical direction. The first guide structure (71) is connected to the support frame (1) and has a pointer (711) that aligns with the scale (721).

5. The height adjustment device according to claim 1, characterized in that, The transmission component (4) includes a belt connected between the driving component (2) and the driven component (3).

6. The height adjustment device according to any one of claims 1-5, characterized in that, The height adjustment device further includes a tensioning mechanism (8), which includes a tensioning wheel (81) and an operating component (82). The tensioning wheel (81) slides with the support frame (1) and abuts against the transmission component (4). The operating component (82) is connected between the support frame (1) and the tensioning wheel (81) to adjust the position of the tensioning wheel (81) relative to the support frame (1).

7. The height adjustment device according to claim 6, characterized in that, The tensioning mechanism (8) further includes a pressure sensor (83), which is connected to the tensioning wheel (81) or the operating component (82). The pressure sensor (83) is used to detect the thrust information given to the tensioning wheel (81) by the transmission component (4).

8. The height adjustment device according to claim 7, characterized in that, The operating component (82) includes a driver (821) connected between the support frame (1) and the tension wheel (81). The height adjustment device also includes a controller (9). The driver (821) and the pressure sensor (83) are both connected to the controller (9). The controller (9) is used to control the operation of the driver (821) according to the thrust information.

9. The height adjustment device according to any one of claims 1-5, characterized in that, The can-in frame (5) and the can-out frame (6) are equipped with sensor assemblies (10), which are used to detect the height of the bottom surface of the can-in frame (5) and the bottom surface of the can-out frame (6).

10. A pre-sealing machine, characterized in that, Includes the height adjustment device as described in any one of claims 1-9.

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