Precise rotating mechanism and pad printing machine applying same

Abstract

The utility model discloses a precise rotating mechanism and a pad printing machine applying the same, the precise rotating mechanism comprises a driving part and a rotating shaft driven by the driving part to rotate, the rotating shaft is sequentially sleeved with a thrust roller bearing, a cylindrical roller bearing and a locking nut, and the cylindrical roller bearing abuts against the locking nut; the precise rotating mechanism further comprises a supporting base and an unpowered roller installed on the supporting base, one end of the rotating shaft is placed on the supporting base, and the rotating shaft and the unpowered roller are arranged adjacently. According to the precise rotating mechanism and the pad printing machine applying the precise rotating mechanism, the purpose that the rotating shaft is gapless in the axial direction, a product is driven to precisely rotate at any angle, and jumping and displacement of the product during rotation are limited is achieved, so that the product consistency needed by the production technology is achieved, and the production requirement is met.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, and in particular to a precision rotating mechanism and a pad printing machine using the same. Background Technology

[0002] Currently, most cantilever shaft rotation mechanisms on the market are installed within deep groove ball bearings. This results in axial clearance (0.1-0.3mm) and axial runout of approximately 0.3mm, making it impossible to guarantee the horizontal consistency of the product during rotation. Pad printing machines are printing equipment suitable for plastics, toys, glass, metals, ceramics, electronics, IC packaging, etc. Pad printing is an indirect, concave pad printing technology and has become a primary method for printing and decorating various object surfaces. During pad printing, the product to be printed needs to be precisely rotated to improve printing accuracy and quality. If the product's rotation is inconsistent before printing, the yield rate of the printed products cannot be guaranteed. Utility Model Content

[0003] The main technical problem solved by this utility model is to provide a precision rotating mechanism and a pad printing machine using the same, which limits the jumping and displacement of the product during rotation and avoids all or some of the above-mentioned defects.

[0004] To solve the above-mentioned technical problems, the present invention adopts a technical solution as follows: a precision rotating mechanism is provided, including a driving component and a rotating shaft driven by the driving component. A thrust roller bearing, a cylindrical roller bearing and a locking nut are sequentially sleeved on the rotating shaft, and the cylindrical roller bearing abuts against the locking nut.

[0005] The precision rotating mechanism also includes a support base and a non-powered roller mounted on the support base. One end of the rotating shaft is placed on the support base, and the rotating shaft and the non-powered roller are arranged adjacent to each other.

[0006] The precision rotating mechanism further includes a bearing mounting plate, and the outer circumferences of both the thrust roller bearing and the cylindrical roller bearing are fixed to the bearing mounting plate.

[0007] The precision rotating mechanism further includes a cylinder, the output shaft of which is connected to the bottom of the support base.

[0008] The number of thrust roller bearings and cylindrical roller bearings are both two, with the two cylindrical roller bearings arranged adjacent to each other and the two thrust roller bearings respectively located at both ends of the two cylindrical roller bearings.

[0009] The support base is provided with a groove that matches the outer diameter of the rotating shaft, and the rotating shaft is placed in the groove.

[0010] The number of the unpowered rollers is two, and the two unpowered rollers are respectively arranged on different sides of the rotating shaft.

[0011] The number of the rotating shafts is multiple, and the multiple rotating shafts are arranged in parallel.

[0012] The driving component includes a motor, a synchronous pulley, and a synchronous belt. The motor drives the synchronous belt to move. The synchronous belt is wrapped around the outer circumference of the synchronous pulley, and the synchronous pulley is mounted on the end of the rotating shaft.

[0013] The drive unit also includes a speed reducer, which is located between the motor and the synchronous belt.

[0014] To solve the technical problem, this utility model also provides a pad printing machine, which includes a precision rotating mechanism as described in any of the above claims.

[0015] Compared with the prior art, the advantages of the precision rotating mechanism of this utility model and the pad printing machine using it are: achieving zero axial clearance of the rotating shaft, driving the product to rotate precisely at any angle, limiting the product's jump and displacement during rotation, thereby achieving product consistency required by the production process and meeting production needs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the precision rotating mechanism of this utility model after removing the driving component and the cylinder;

[0018] Figure 2 This is a top view of the precision rotating mechanism of this utility model;

[0019] Figure 3 This is a side structural diagram of the precision rotating mechanism of this utility model. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] In this embodiment of the invention, all directional indicators (such as up, down, left, right, front, back, etc.) are only used to explain the relative positional relationship and movement of the components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indicator will also change accordingly. The terms "first," "second," etc., used in this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0022] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] Please see Figures 1 to 3 , Figure 1 This is a schematic diagram of the structure of the precision rotating mechanism of this utility model after removing the drive component and cylinder, showing the remaining components. The precision rotating mechanism is used to drive the product 100 to rotate precisely. In one embodiment, the product 100 can be a production part fixed on a pad printing machine awaiting printing. The product 100 is sleeved on the rotating shaft 1 and rotates with the rotation of the rotating shaft 1. In this application, the precision rotating mechanism includes a drive component and a rotating shaft 1 driven by the drive component. A thrust roller bearing 2, a cylindrical roller bearing 3, and a locking nut 4 are sequentially sleeved on the rotating shaft 1, with the cylindrical roller bearing 3 abutting against the locking nut 4. The rotating shaft 1 is a cylindrical solid shaft. For ease of understanding, the two ends of the rotating shaft 1 in the axial direction are defined as the first end and the second end. The thrust roller bearing 2, the cylindrical roller bearing 3, and the lock nut 4 are all located in the middle section between the first end and the second end of the rotating shaft 1. The thrust roller bearing 2 is adjacent to the cylindrical roller bearing 3, the cylindrical roller bearing 3 is adjacent to the lock nut 4, and the cylindrical roller bearing 3 is located between the thrust roller bearing 2 and the lock nut 4.

[0024] The thrust roller bearing 2 is used to bear combined axial and radial loads, primarily axial loads. Compared to other bearings, this type of bearing has a lower coefficient of friction, higher rotational speed, and self-aligning properties. Therefore, in this application, a thrust roller bearing 2 is provided on the rotating shaft 1 to bear the axial load generated during the rotation of the rotating shaft 1 and reduce axial runout. The cylindrical roller bearing 3 is typically guided by two flanges of a bearing ring. The cage, rollers, and guide ring form an assembly, which is generally a separable type of bearing. This type of bearing is generally only used to bear radial loads. Only single-row bearings with flanges on both the inner and outer rings can bear small axial loads or large intermittent axial loads. Compared to deep groove ball bearings of the same dimensions, this type of bearing has a larger radial load capacity. Therefore, in this application, a cylindrical roller bearing 3 is provided at the end away from the lock nut 4 to bear the radial load generated during the rotation of the rotating shaft 1 and reduce radial movement. This application also includes a lock nut 4 to achieve axial locking of the thrust roller bearing 2 and the cylindrical roller bearing 3. With the above configuration, when the rotating shaft 1 drives the product 100 to rotate, the axial load and radial load are respectively borne by the thrust roller bearing 2 and the cylindrical roller bearing 3. At the same time, the thrust roller bearing 2 and the cylindrical roller bearing 3 are locked by the lock nut 4, thereby avoiding radial and axial runout of the rotating shaft 1 during rotation and achieving precise rotational positioning of the product 100 before printing.

[0025] The precision rotating mechanism also includes a support base 5 and a non-powered roller 6 mounted on the support base 5. One end of the rotating shaft 1 is placed on the support base 5, and the rotating shaft 1 and the non-powered roller 6 are arranged adjacent to each other. In one embodiment, the first end of the rotating shaft 1 is connected to the driving component, and the second end is suspended for mounting the product 100. In this application, a support base 5 is added to the second end of the rotating shaft 1, i.e., the cantilever end, to prevent deformation of the rotating shaft 1 and increase its load-bearing capacity. A non-powered roller 6 is added below the product 100. The non-powered roller 6 supports the product 100 and, by rotating itself, prevents friction with the product 100, thus avoiding defects in the appearance of the product 100. The axial direction of the non-powered roller 6 is the same as that of the rotating shaft 1, and both ends are mounted on the support base 5.

[0026] The non-powered roller 6 consists of the following components: a cylinder body, an inner shaft, end caps, and bearings. The cylinder body is generally made of round tubing, commonly steel or plastic; high-precision and high-strength versions can be made of round steel. The inner shaft is also generally made of round steel; smaller diameter shafts can be made of cold-drawn round steel, while larger diameter shafts with high precision can be machined. The end caps are generally made of carbon steel; smaller diameter shafts with lower load caps can be stamped, while larger diameter shafts or shafts with higher load caps are machined. Appropriate standard bearings are selected based on the cylinder body and end caps.

[0027] Through the above-described configuration of the precision rotating mechanism of this application, the axial clearance of the rotating shaft 1 is eliminated, driving the product 100 to rotate precisely to any angle, limiting the runout and displacement of the product 100 during rotation, ensuring that the axial runout amplitude of the product 100 during rotation is within 0.05mm, and ensuring that the horizontal consistency of the product 100 during rotation is within 0.05mm, thereby achieving the product consistency required by the production process and meeting production needs.

[0028] The precision rotating mechanism in this application also includes a bearing mounting plate 7, on which the outer peripheries of the thrust roller bearing 2 and the cylindrical roller bearing 3 are fixed. The bearing mounting plate 7 serves to withstand axial and radial pressure, preventing excessive deformation and swaying during operation, thus maintaining the stability and safety of the equipment. It also reduces runout and displacement of the rotating shaft 1 during rotation, ensuring precise rotation of the rotating shaft 1 and the product 100. Furthermore, the bearing mounting plate 7 reduces equipment vibration, especially at high speeds, effectively reducing resonance effects caused by inertial and centrifugal forces, preventing resonance damage, and improving equipment operating efficiency and lifespan. The bearing mounting plate 7 is typically made of materials such as steel plate, cast iron, or aluminum alloy, which possess good strength and stability, capable of withstanding the weight of the equipment and pressure from various directions.

[0029] The precision rotating mechanism in this application also includes a cylinder 8, the output shaft of which is connected to the bottom of the support base 5. The support base 5 can move up and down; when it moves down, it creates space to place the product 100 at the end of the rotating shaft 1. After placement, the support base 5 is moved up, and the rotating shaft 1 and the product 100 are supported by the support base 5 and the unpowered rollers 6 located on it. The moving distance can be set according to different needs to accommodate products 100 of different sizes. The cylinder 8 is mounted on the overall frame and is used to drive the support base 5 to move up and down.

[0030] In this application, there are two thrust roller bearings 2 and two cylindrical roller bearings 3. The two cylindrical roller bearings 3 are arranged adjacent to each other, and the two thrust roller bearings 2 are respectively located at both ends of the two cylindrical roller bearings 3. By setting multiple thrust roller bearings 2 and cylindrical roller bearings 3, the axial and radial loads generated when the rotating shaft 1 rotates can be better borne, the error can be minimized, and the rotation accuracy can be increased.

[0031] In this application, the support base 5 is provided with a groove 51 that matches the outer diameter of the rotating shaft 1. The rotating shaft 1 is placed in the groove 51, which can also limit the vibration displacement when the rotating shaft 1 rotates. The center of the groove 51 is higher than the axis of the unpowered roller 6, so that the unpowered roller 6 is located below the product 100 and supports the product 100.

[0032] In this application, there are two unpowered rollers 6, which are respectively set on different sides of the rotating shaft 1, so as to protect more surfaces of the product 100 as much as possible.

[0033] In this application, there are multiple rotating shafts 1, and the multiple rotating shafts 1 are arranged in parallel. One driving component drives multiple rotating shafts 1 to move synchronously, thereby improving production efficiency.

[0034] The driving components in this application include a motor 9, a synchronous pulley 10, and a synchronous belt 11. The motor 9 drives the synchronous belt 11 to move. The synchronous belt 11 is wound around the outer circumference of the synchronous pulley 10, which is mounted on the end of the rotating shaft 1. The motor 9 can be a servo motor, which is the engine that controls the operation of mechanical components in a servo system and is a type of auxiliary motor indirect speed change device. A servo motor can control speed with very high positional accuracy and can convert voltage signals into torque and speed to drive the controlled object, facilitating precise control of the rotation of the rotating shaft 1. The synchronous belt 11 can drive multiple parallel rotating shafts 1 to rotate synchronously, improving production efficiency.

[0035] In this application, the drive unit also includes a speed reducer 12, which is located between the motor 9 and the synchronous belt 11. The speed reducer 12 is an independent component consisting of gear transmission, worm transmission, or gear-worm transmission enclosed in a rigid housing. It is used for speed reduction of the motor 9, with the purpose of reducing the speed and increasing the torque.

[0036] To address the technical problem, this application also provides a pad printing machine, which includes the aforementioned precision rotating mechanism. During pad printing, the product to be printed needs to be precisely rotated to a predetermined direction to improve printing accuracy and quality. If the product rotation is inconsistent before printing, the yield rate of the printed products cannot be guaranteed. Applying a precision rotating mechanism can achieve the product consistency required by the production process, thus meeting production needs.

[0037] Using the precision rotating mechanism of this utility model and the pad printing machine that applies it, the axial gap of the rotating shaft is eliminated, driving the product to rotate precisely at any angle, limiting the product's jump and displacement during rotation, thereby achieving the product consistency required by the production process and meeting production needs.

[0038] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A precision rotating mechanism, characterized in that, The precision rotating mechanism includes a driving component and a rotating shaft driven by the driving component. A thrust roller bearing, a cylindrical roller bearing, and a locking nut are sequentially sleeved on the rotating shaft, with the cylindrical roller bearing abutting against the locking nut. The precision rotating mechanism also includes a support base and a non-powered roller mounted on the support base. One end of the rotating shaft is placed on the support base, and the rotating shaft and the non-powered roller are arranged adjacent to each other.

2. The precision rotating mechanism according to claim 1, characterized in that, The precision rotating mechanism also includes a bearing mounting plate, on which the outer peripheries of the thrust roller bearing and the cylindrical roller bearing are fixed.

3. The precision rotating mechanism according to claim 2, characterized in that, The precision rotating mechanism also includes a cylinder, the output shaft of which is connected to the bottom of the support base.

4. The precision rotating mechanism according to claim 1, characterized in that, The number of thrust roller bearings and cylindrical roller bearings are both two, with the two cylindrical roller bearings arranged adjacent to each other, and the two thrust roller bearings respectively located at both ends of the two cylindrical roller bearings.

5. The precision rotating mechanism according to claim 1, characterized in that, The support base is provided with a groove that matches the outer diameter of the rotating shaft, and the rotating shaft is placed in the groove.

6. The precision rotating mechanism according to claim 1, characterized in that, The number of the non-powered rollers is two, and the two non-powered rollers are respectively arranged on different sides of the rotating shaft.

7. The precision rotating mechanism according to claim 1, characterized in that, The number of the rotating shafts is multiple, and the multiple rotating shafts are arranged in parallel.

8. The precision rotating mechanism according to claim 7, characterized in that, The driving component includes a motor, a synchronous pulley, and a synchronous belt. The motor drives the synchronous belt to move. The synchronous belt is wrapped around the outer circumference of the synchronous pulley, and the synchronous pulley is mounted on the end of the rotating shaft.

9. The precision rotating mechanism according to claim 8, characterized in that, The drive unit also includes a speed reducer, which is located between the motor and the synchronous belt.

10. A pad printing machine, characterized in that, The pad printing machine includes a precision rotating mechanism as described in any one of claims 1-9.

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