Electric lead screw adjusting device

Abstract

The utility model discloses an electric lead screw adjusting device, and relates to the technical field of packaging machinery. According to the electric screw rod adjusting device, a small direct-current motor can be used as a power source, the proximity switch I is used for sensing the initial position of the screw rod nut, then the proximity switch II is used for detecting the number of rotation turns of the fluted disc coaxially assembled with the screw rod, and the number of turns of the motor is converted according to the number of rotation turns of the fluted disc. The position of the lead screw nut can be obtained through conversion according to the number of turns and the screw pitch of the screw, the purpose of accurately adjusting the position of the lead screw nut through the small direct-current motor is achieved, the structure is stable, operation is stable, and cost is low.

Description

TECHNICAL FIELD

[0001] The utility model relates to packing machinery technical field more specifically, relate to a kind of electric screw rod adjusting device. BACKGROUND

[0002] In the field of packaging machinery, screw rod adjusting device is widely used, and is often used for adjusting the stroke of workpiece or the distance between two workpieces. For example, in the box opening machine equipment, screw rod adjusting device is used to adjust the width of the packaging box conveying channel; in the film packaging machine equipment, it is used to adjust the distance between two film supporting rollers; in the soft paper extraction packaging machine equipment, screw rod adjusting device can adjust the size of the opening on the rotating disc; in the conveying equipment, it can be used to adjust the height of the conveying equipment or the distance between the side plates on both sides of the conveying equipment, etc.

[0003] Screw rod adjusting device is suitable for various types of equipment, covering stroke adjustment, height adjustment and distance adjustment, etc. In most equipment, screw rod adjusting device adopts manual adjustment mode, i.e. the operator rotates the hand wheel to drive the screw rod to rotate, and through the thread cooperation between the screw rod and the screw nut, the corresponding adjustment purpose is achieved. However, this manual adjustment mode is low in efficiency, and in the adjustment process, it often needs to rely on the measurement of ruler or the experience judgment of the operator to make the position of the adjusted workpiece meet the requirements.

[0004] In the prior art, there is also a screw rod adjusting device driven by a servo motor. This kind of device can realize high-precision adjustment by precisely controlling the number of rotations of the servo motor and then precisely controlling the position of the screw nut. However, this electric adjustment mode relies on the servo motor, which is high in cost. When applied to various equipment such as racks, conveying equipment, box opening machines and film supporting devices, it will significantly increase the cost of the equipment, resulting in low cost performance.

[0005] In addition, there are also some screw rod adjusting devices driven by ordinary motors in the prior art. This kind of device needs to be controlled in combination with proximity switches, and can only realize adjustment at specified positions, and cannot meet the demand of adjustment at any position. For example, the utility model patent with the name of "packaging machine tray mechanism capable of automatically lifting" and the authorization announcement date of February 5, 2019 and the authorization announcement number of CN208470232U. The mechanism involved in this patent includes a tray, a slide rail arranged in the vertical direction, the tray being installed on the slide rail and being slidable in the vertical direction, a sliding screw nut fixedly connected with the tray, a screw rod arranged in the vertical direction and being rotatable around the vertical axis, the sliding screw nut cooperating with the screw rod, a speed reduction transmission mechanism for driving the screw rod to rotate in the forward / reverse rotation mode, a detection plate connected with the tray for indicating the height position of the tray, and a plurality of proximity switches arranged at different height positions in the vertical direction for sensing the position of the detection plate and outputting corresponding control information.

[0006] The above-mentioned packaging machine tray mechanism capable of automatically lifting is sensed by a plurality of proximity switches arranged at different height positions in the vertical direction to detect the position of the detection plate, so as to realize automatic adjustment. However, the electric adjustment mechanism has limitations, and a large number of proximity switches are required, and in fact, it is difficult to realize adjustment at any position. If a position is not provided with a proximity switch, it is difficult to accurately control the detection plate to move to the position. Content of the utility model

[0007] In order to overcome the defects and deficiencies existing in the prior art, the utility model provides a kind of electric screw rod adjusting device, the utility model aims at providing a kind of electric screw rod adjusting device with low cost, and the electric screw rod adjusting device can be accurately controlled to any position.The electric screw rod adjusting device of the utility model can use DC small motor as power source, the initial position of screw rod nut is sensed by a proximity switch I, then the number of turns of the gear disc coaxially assembled with the screw rod is detected by a proximity switch II, the number of turns of the motor is converted according to the number of turns of the gear disc, and the position of the screw rod nut can be converted by the number of turns and the pitch of the screw rod, so as to realize the purpose of accurately adjusting the position of the screw rod nut by DC small motor, and the structure is stable, the operation is stable and the cost is low.

[0008] In order to solve the problems existing in the prior art, the utility model is realized by the following technical scheme.

[0009] The utility model discloses a kind of electric screw rod adjusting device, including screw rod and screw rod nut, the screw rod is connected with drive motor, and screw rod is rotated by drive motor, and the screw rod nut is cooperated with screw thread;It further includes proximity switch I and proximity switch II, the proximity switch I is set in the initial position of screw rod nut, for detecting whether screw rod nut is located in initial position;The gear disc that rotates coaxially with screw rod is assembled on the screw rod, and the proximity switch II is used to detect the number of turns of the gear disc rotating coaxially with screw rod.

[0010] Further preferably, the drive motor is a DC motor.

[0011] Further preferably, the screw rod is a bidirectional screw rod, and two screw rod nuts are connected by screw thread.

[0012] Further preferably, the electric screw rod adjusting device further includes a first screw rod mounting seat and a second screw rod mounting seat, and the two ends of the screw rod are rotatably assembled on the first screw rod mounting seat and the second screw rod mounting seat, respectively.

[0013] More preferably, a guide shaft parallel to the screw rod is arranged between the first screw rod mounting seat and the second screw rod mounting seat, and the screw rod nut is slidably assembled on the guide shaft.

[0014] Further preferably, the lead screw nut is provided with an inductive sheet.

[0015] The utility model discloses a second aspect provides a kind of electric screw rod adjusting device, including screw rod and screw nut, the screw nut is connected with driving motor, and screw nut is rotated by driving motor driving, the screw nut is cooperated with screw rod thread;Further including proximity switch I and proximity switch II, the proximity switch I is arranged in the initial position of screw rod, for detecting whether screw rod is located initial position, the screw nut is equipped with the gear disc that rotates coaxially with screw nut, and the proximity switch II is used to detect the number of turns of the gear disc rotating coaxially with screw nut.

[0016] Further preferably, the electric screw rod adjusting device further includes a mounting seat, and the screw nut is rotatably assembled on the mounting seat.

[0017] More preferably, the driving motor is fixedly assembled on the mounting seat.

[0018] Further preferably, the driving motor is a DC motor.

[0019] Compared with the prior art, the utility model brings the beneficial technical effect in:

[0020] 1. Precise adjustment: the initial position of the lead screw nut (or lead screw) is sensed by the proximity switch I, the number of turns of the gear disc coaxially assembled with the lead screw (or lead screw nut) is detected by the proximity switch II, the number of turns of the motor is converted according to the transmission relationship between the gear disc and the motor, and the position of the lead screw nut is accurately calculated according to the lead screw pitch, so that precise adjustment of the position of the lead screw nut is realized, and the defects of manual adjustment depending on experience and ruler and ordinary motor drive being able to only adjust the specified position are overcome.

[0021] 2. Stable operation: whether the lead screw and the lead screw nut are driven to rotate by the driving motor or the lead screw nut is driven to rotate by the driving motor, a reasonable mounting structure is matched. For example, the lead screw is rotatably assembled on the first lead screw mounting seat and the second lead screw mounting seat at both ends, and some schemes further provide a guide shaft parallel to the lead screw, and the lead screw nut is slidingly assembled on the guide shaft, so that the entire device has stable structure and strong stability during operation.

[0022] 3. Cost reduction: a DC small motor is selected as the power source, compared with the lead screw adjusting device driven by a servo motor in the prior art, the cost is effectively reduced, and the cost performance is improved when applied to various equipment such as racks, conveying equipment, unpacking machines and film supporting devices.

[0023] 4. Flexible Design: This utility model provides two designs for electric lead screw adjustment devices. One design uses a drive motor to rotate the lead screw, with the lead screw nut engaging with the lead screw thread; the other design uses a drive motor to rotate the lead screw nut, which also engages with the lead screw thread. Both designs have their own optimized structural designs, such as a bidirectional threaded lead screw paired with two lead screw nuts, or the lead screw nut being rotatably mounted on a mounting base with the drive motor fixed to the mounting base, providing diverse options for applications in different scenarios.

[0024] 5. Convenient detection: The lead screw nut is equipped with a sensor plate, which, together with proximity switch I, can more easily and accurately detect the position of the lead screw nut, further improving the accuracy and convenience of adjustment. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the electric lead screw adjustment device of this utility model;

[0026] Figure 2 This is a schematic diagram of the main structure of the electric lead screw adjustment device of this utility model;

[0027] Reference numerals in the attached drawings: 1. Lead screw, 2. Lead screw nut, 3. Drive motor, 4. Proximity switch I, 5. Proximity switch II, 6. Gear disc, 7. Sensing plate, 8. First lead screw mounting base, 9. Second lead screw mounting base, 10. Guide shaft. Detailed Implementation

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

[0029] Example 1

[0030] As a preferred embodiment of this utility model, please refer to the appendix to the specification. Figure 1 and attached Figure 2 As shown, this embodiment discloses an electric lead screw 1 adjustment device, mainly used in frame height adjustment scenarios. The core components of the device include a lead screw 1 and a lead screw nut 2. The lead screw 1 is securely connected to a drive motor 3, and the lead screw 1 is driven to rotate by the power output from the drive motor 3. The lead screw nut 2 moves relative to the lead screw 1 through a precise thread engagement.

[0031] To achieve precise control, the device is also equipped with proximity switch I 4 and proximity switch II 5. Among them, the proximity switch I 4 is carefully set in the initial position of the screw nut 2, and its main function is to sensitively detect whether the screw nut 2 is in the initial position. On the screw rod 1, a toothed disc 6 is closely fitted and rotates coaxially with the screw rod 1, and the proximity switch II 5 is responsible for accurately detecting the number of turns of the toothed disc 6 rotating coaxially with the screw rod 1.

[0032] In actual application to rack height adjustment, the screw nut 2 is relatively fixed with the adjusted rack, and the movement of the screw nut 2 drives the movement of the rack, thereby realizing the adjustment of the rack height. The preparation work before initial use is very important. At this time, the screw nut 2 needs to be accurately adjusted to the initial position, and the setting of this initial position has flexibility and can be reasonably set according to the actual working conditions. For example, in some scenarios where there are strict requirements for the lower limit of the rack height, the initial position can be set to the lowest position that the screw nut 2 can reach, so that the adjustment of the rack height in the subsequent adjustment process starts from the lowest position as the reference; in some cases where the upper limit of the rack height is more concerned, the initial position can be set to the highest position of the screw nut 2; in addition, considering the end position of the screw nut 2 on the screw rod 1 is convenient for positioning and calculation, the initial position can also be set at the end position of the screw nut 2 on the screw rod 1. In short, the setting of the initial position can be flexibly adjusted according to the actual use conditions to meet different application requirements.

[0033] It is worth noting that in the actual installation process, the installation position of the proximity switch I 4 itself determines the initial position of the screw nut 2, and its installation range is limited within the movable stroke of the screw nut 2. Such design not only ensures that the proximity switch I 4 can effectively detect the initial position of the screw nut 2, but also avoids the problem of detection failure due to exceeding the stroke range.

[0034] The significance of setting the initial position is that it provides a clear starting reference point for the entire adjustment system, i.e. the zero position calculated for the drive motor 3, starting from the position where the screw nut 2 is in the initial position. From this initial position, no matter the screw rod 1 rotates forward or reversely, the number of turns can be accurately obtained by the proximity switch II 5 through detecting the number of turns of the toothed disc 6. Since the pitch of the screw rod 1 is a known and fixed parameter, by combining the detected number of turns of the toothed disc 6 with the pitch of the screw rod 1, the number of strokes that the screw nut 2 has moved from the initial position can be accurately calculated, thereby realizing precise control of the adjustment position of the screw nut 2 and ensuring that the rack height can be adjusted with the expected accuracy. This precise control mechanism effectively overcomes the inaccuracy of traditional manual adjustment which relies on the experience of the operator and the ruler measurement, and the limitation of ordinary motor drive which can only adjust to a specified position, greatly improving the efficiency and accuracy of the rack height adjustment.

[0035] As an example of the embodiment, the driving motor 3 is a direct current motor. The direct current motor is selected as the driving motor 3, which helps to reduce the cost and improve the overall cost performance under the premise of ensuring the performance of the device compared with some complex and expensive motor types.

[0036] Embodiment 2

[0037] As another preferred embodiment of the utility model, the embodiment is based on the above-mentioned embodiment 1, and the technical scheme of the utility model is further supplemented and described in detail, which aims to show the optimization design of the electric screw rod 1 adjusting device in different application scenarios.

[0038] In the embodiment, the screw rod 1 and related components are designed as shown in the accompanying drawings of the specification. Figure 1 and the accompanying drawings. Figure 2 The screw rod 1 described here is a bidirectional threaded screw rod 1, which is connected with two screw rod nuts 2 through a unique thread structure. This design enables the two screw rod nuts 2 to move relatively or in opposite directions along the axial direction of the screw rod 1 based on the characteristics of the bidirectional thread when the screw rod 1 rotates, laying a foundation for realizing specific adjustment functions.

[0039] To ensure stable rotation of the screw rod 1 and smooth movement of the screw rod nut 2, the electric screw rod 1 adjusting device is also equipped with a first screw rod mounting seat 8 and a second screw rod mounting seat 9, both ends of the screw rod 1 are precisely assembled on the two mounting seats in a rotatable manner, ensuring that the screw rod 1 maintains a stable axial position during operation. At the same time, a guide shaft 10 parallel to the screw rod 1 is arranged between the first screw rod mounting seat 8 and the second screw rod mounting seat 9, and the screw rod nut 2 is slidingly assembled on the guide shaft 10. The presence of the guide shaft 10 provides precise guidance for the movement of the screw rod nut 2, avoiding its deviation or shaking during movement, further improving the stability of the device operation and the accuracy of the adjustment.

[0040] A further preferred scheme is to provide an inductive sheet 7 on the screw rod nut 2. The inductive sheet 7 cooperates with the proximity switch I 4 mentioned in embodiment 1 to more accurately detect the position of the screw rod nut 2. Especially when the bidirectional threaded screw rod 1 drives the two screw rod nuts 2 to move relatively complexly, the inductive sheet 7 can help the proximity switch I 4 to capture the position information of the screw rod nut 2 more quickly and accurately, thereby providing more accurate data support for the entire adjustment system.

[0041] Based on such design, the electric screw rod 1 adjusting device of the bidirectional threaded screw rod 1 exhibits unique application advantages, especially suitable for the working conditions of spacing adjustment. For example, in the width adjustment scene of the packaging box conveying channel of the unpacking machine, by driving the motor 3 to rotate the bidirectional threaded screw rod 1, the two screw nuts 2 can move towards or away from each other according to actual needs, so as to accurately adjust the width of the packaging box conveying channel to adapt to the conveying requirements of packaging boxes of different sizes. Similarly, in the spacing adjustment between the two side plates of the conveying equipment, the device can also play an important role, by rotating the screw rod 1 to drive the screw nut 2 to move, thereby flexibly adjusting the spacing between the two side plates to meet the conveying requirements of different specifications of goods. Such design not only improves the accuracy and efficiency of adjustment, but also enhances the adaptability of the equipment to diversified production needs.

[0042] Embodiment 3

[0043] As another preferred embodiment of the utility model, the embodiment provides a unique electric screw rod 1 adjusting device (although not shown in the drawings, but the structure and principle are clear and explicit). The device focuses on meeting the needs of the screw rod 1 adjusting device in specific scenarios in terms of design concept, and optimizes the structure and function.

[0044] From the core structure, this electric screw rod 1 adjusting device contains a screw rod 1 and a screw nut 2, and its unique feature is the driving mode. The screw nut 2 is directly connected with the driving motor 3, and the driving motor 3 drives the screw nut 2 to rotate. The screw nut 2 and the screw rod 1 realize relative movement through thread cooperation. Compared with the traditional way of driving the screw rod 1 to rotate, this driving mode can more directly and efficiently achieve the adjustment purpose in some application scenarios.

[0045] In order to realize accurate position control, the device is also equipped with proximity switch I 4 and proximity switch II 5. The proximity switch I 4 is ingeniously arranged at the initial position of the screw rod 1, and undertakes the key task of detecting whether the screw rod 1 is at the initial position. At the same time, a toothed disc 6 coaxial with the screw nut 2 is closely assembled on the screw nut 2, and the proximity switch II 5 focuses on detecting the number of turns of the toothed disc 6 coaxial with the screw nut 2. Through the cooperative work of the two proximity switches, the device is like a pair of precise "eyes", which can obtain the position information of the screw rod 1 and the screw nut 2 in real time, so as to realize accurate control of the adjustment process.

[0046] To ensure the stability and reliability of the device as a whole, the electric screw rod 1 adjusting device is also carefully designed with a mounting structure. It is equipped with a mounting seat, and the screw rod nut 2 is precisely assembled on the mounting seat in a rotatable manner, ensuring that the screw rod nut 2 maintains a stable position and posture during rotation. At the same time, the driving motor 3 is firmly fixed and assembled on the mounting seat. This integrated mounting design not only makes the device structure compact, but also reduces errors that may be caused by loose or displaced parts, further improving the stability of the device operation.

[0047] It is worth mentioning that the driving motor 3 in this embodiment is a DC motor. The DC motor has many advantages, such as good speed regulation performance, which can accurately adjust the speed according to actual needs, thereby realizing precise control of the rotation speed of the screw rod nut 2, and further meeting the requirements of adjustment speed under different working conditions. At the same time, the starting torque of the DC motor is large, which can provide enough power at the starting moment to ensure that the screw rod nut 2 can start rotating quickly and smoothly. These characteristics make the electric screw rod 1 adjusting device using a DC motor as a driving source exhibit higher performance and reliability in actual application.

[0048] In summary, the electric screw rod 1 adjusting device of the present embodiment provides a high-efficiency and reliable solution for various application scenarios that require precise screw rod 1 adjustment, thanks to its unique driving method, precise position detection system, stable mounting structure, and excellent performance of the DC motor drive. For example, in some automated equipment that requires compact space layout and has high requirements for adjustment accuracy and speed, the device can fully utilize its advantages to achieve precise adjustment of the position of key components of the equipment, and help the equipment to run efficiently and stably.

[0049] Although the present inventive concept has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details can be made therein without departing from the spirit and scope of the present inventive concept as defined by the appended claims.

Claims

1. An electric screw rod adjusting device, comprising a screw rod (1) and a screw rod nut (2), the screw rod (1) is connected with a driving motor (3), the driving motor (3) drives the screw rod (1) to rotate, the screw rod nut (2) is threadedly matched with the screw rod (1); characterized in that: The electric screw rod adjusting device further comprises a first screw rod mounting base (8) and a second screw rod mounting base (9), and two ends of the screw rod (1) are rotatably assembled on the first screw rod mounting base (8) and the second screw rod mounting base (9) respectively.

2. An electric screw drive adjustment device as claimed in claim 1, characterized in that: The driving motor (3) is a direct current motor.

3. An electric screw drive adjustment device as defined in claim 1, wherein: The screw rod (1) is a bidirectional screw rod (1) with two screw rod nuts (2) connected by threads.

4. An electric screw drive adjustment device as claimed in any one of claims 1-3, characterized in that: The electric screw rod adjusting device further comprises a first screw rod mounting base (8) and a second screw rod mounting base (9), and two ends of the screw rod (1) are rotatably assembled on the first screw rod mounting base (8) and the second screw rod mounting base (9) respectively.

5. An electrically powered screw adjustment device as claimed in claim 4, characterized in that: The driving motor (3) is a direct current motor.

6. An electric screw drive adjustment device as claimed in any one of claims 1-3, characterized in that: The driving motor (3) is a direct current motor.

7. An electric screw rod adjusting device, comprising a screw rod (1) and a screw rod nut (2), the screw rod nut (2) is connected with a driving motor (3), the driving motor (3) drives the screw rod nut (2) to rotate, and the screw rod nut (2) is in threaded cooperation with the screw rod (1); characterized in that: ​ 8. An electrically powered screw adjustment device as claimed in claim 7, characterized in that: ​ 9. An electrically powered screw adjustment device as claimed in claim 8, characterized in that: ​ 10. An electric screw drive adjustment device as claimed in any one of claims 7-9, characterized in that: ​

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