A doctor blade wear compensation device

Abstract

The utility model relates to auxiliary frock technical field of silk production line, disclose a scraper wear compensation device, include: be used for the scraper assembly of cleaning the surface of carrier roller, still be equipped with at least one spring buffer for the scraper wear compensation between scraper seat and connecting plate, be used for the compensation mechanism of spring buffer lost elasticity compensation, and the compensation mechanism includes first force arm and second force arm, one end of first force arm is fixedly connected with connecting plate, and the other end is equipped with first gear, one end of second force arm is equipped with second gear, and the other end is used for the counterweight assembly that can provide the tension along the vertical direction, first gear and second gear all rotate and connect on fixed support, and interlock, make first force arm and second force arm synchronous relative rotation and connect, the bottom of counterweight assembly is equipped with the tension spring for adjusting the tension of counterweight assembly. Solve the problem that the compensation effect of scraper is weakened after the scraper wear in the prior art, and the scraping effect is influenced simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary tooling technology for silk production lines, and in particular to a scraper wear compensation device. Background Technology

[0002] Electronic belt scales are widely used in cigarette manufacturing production lines for material measurement and control to ensure accuracy and timeliness at each stage of production. Idler rollers and scraper assemblies are crucial components of electronic belt scales. During production and conveying, the idler rollers come into contact with the belt surface, and dust or materials from the belt easily adhere to the idler roller surface. The scraper assembly is used to remove the material and dust adhering to the idler roller surface.

[0003] Traditional scraper assemblies are generally fixed scrapers. When the scraper is worn, a gap is created between it and the roller, which greatly reduces the scraping effect. It is necessary to re-sharpen the scraper or adjust the gap, which is time-consuming and labor-intensive and also affects the normal production of the yarn production line.

[0004] The prior art provides a device that uses a spring to compensate for the wear of the scraper. However, as the scraper wears, the spring gradually loosens, weakening the compensation effect. The loosened spring makes it impossible for the scraper to stick stably to the roller, affecting the scraping effect. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a scraper wear compensation device to solve the problem in the prior art where the compensation effect of scraper wear is weakened, affecting the scraping effect.

[0006] This utility model solves the above-mentioned technical problems through the following technical means: a scraper wear compensation device, installed on a fixed bracket of a belt scale frame, comprising:

[0007] A scraper assembly for cleaning the surface of an idler roller includes a connecting plate, a scraper seat, and a scraper that abuts against the idler roller. A guide rod is fixedly connected to one side of the connecting plate, and a sleeve is fixedly connected to the scraper seat. The guide rod is movably inserted into the sleeve. At least one spring damper is also provided between the scraper seat and the connecting plate to compensate for scraper wear.

[0008] A compensation mechanism for compensating for the loss of elastic force in a spring buffer includes a first lever arm and a second lever arm. One end of the first lever arm is fixedly connected to the connecting plate, and the other end is provided with a first gear. One end of the second lever arm is provided with a second gear, and the other end is used to configure a counterweight assembly that can provide tension in the vertical direction. The first gear and the second gear are both rotatably connected to the fixed bracket and mesh with each other, so that the first lever arm and the second lever arm rotate synchronously relative to each other.

[0009] Optionally, the spring damper includes a piston rod for connecting to the scraper seat, a cylinder for connecting to the connecting plate, and a spring assembly disposed in the cylinder for driving the piston rod. The piston rod is slidably engaged with the cylinder, and the spring assembly provides a preset elastic force.

[0010] Optionally, two spring buffers are provided, symmetrically distributed on both sides of the scraper assembly, to ensure the smoothness of scraper clamping.

[0011] Optionally, the counterweight component is a tension spring, one end of which is connected to the second lever arm, and the other end is connected to the fixed bracket. Directly using a tension spring as the counterweight component to compensate for the spring force loss of the balancing scraper results in a simple structure.

[0012] Optionally, the counterweight assembly includes a guide rail vertically fixed to the side of the fixed bracket. The guide rail is equipped with a counterweight slider, and the top of the counterweight slider is equipped with a vertical rod connected to the end of the first lever arm. The counterweight slider provides a constant tension to the compensation mechanism, which is converted into a supporting force for the spring buffer through the lever structure of the compensation mechanism, and finally transmitted to the scraper to ensure the stability of the scraper's contact with the idler roller. Configuring a vertically sliding counterweight slider as a counterweight assembly can provide a constant compensating tension.

[0013] Optionally, the end of the second lever arm is provided with a through groove, and a pin connected to the vertical rod is movably disposed in the through groove. This arrangement allows the rotation of the second lever arm and the raising and lowering of the vertical rod to be achieved simultaneously.

[0014] Optionally, the counterweight assembly further includes a tension spring, one end of which is connected to the bottom of the counterweight slider, and the other end is connected to the fixed bracket. By providing a tension spring at the bottom of the counterweight slider, the constant compensating tension provided by the vertically sliding counterweight slider dynamically compensates for the spring force lost by the spring buffer.

[0015] Optionally, one end of the tension spring is connected to an adjusting screw, which is threadedly connected to the fixed bracket. Rotating the adjusting screw changes the length of the tension spring, thereby adjusting the preset tension and thus adjusting the counterweight assembly.

[0016] Optionally, the cylinder is a transparent cylinder with graduated lines, allowing for visual indication of the scraper's wear and compensation status.

[0017] The beneficial effects of this utility model are:

[0018] This invention utilizes a spring buffer and a compensation mechanism. The spring buffer is positioned between the first lever arm and the scraper assembly. When the scraper wears down, the gap between the scraper assembly and the idler roller increases. The piston rod inside the spring buffer moves towards the idler roller, causing the spring assembly to extend and release a preset elastic force. This spring assembly becomes somewhat relaxed, disrupting the original balance with the compensation mechanism. The first lever arm rotates clockwise to compensate for the elastic force in the spring assembly, while the corresponding second lever arm rotates counterclockwise. This causes the counterweight slider mounted on the second lever arm to move upward, re-establishing a new balance. This completes the elastic force compensation of the spring assembly by the compensation mechanism, achieving precise compensation for wear. This ensures that the scraper and the idler roller surface remain in constant contact, maintaining a relatively constant pressure against the idler roller, thus guaranteeing the effective cleaning of materials or dust from the idler roller surface. This solves the problem of conventional spring-compensated scrapers where the spring becomes relaxed and the scraping effect deteriorates after scraper wear, ultimately improving the stability and reliability of the electronic belt scale. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a cross-sectional schematic diagram of the present invention;

[0021] Figure 3 yes Figure 2 A magnified view of a portion of point M in the middle.

[0022] Among them, 1-fixed bracket,

[0023] 21-Scraper holder, 22-Scraper, 23-Connecting plate;

[0024] 31 - First lever arm, 32 - Second lever arm

[0025] 4-Spring damper, 41-Piston rod, 42-Cylinder, 421-Scale mark, 43-Spring assembly

[0026] 51-Guide rail, 52-Counterweight slider, 53-Vertical rod, 54-Tension spring, 55-Adjusting screw. Detailed Implementation

[0027] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are for illustrative purposes only and represent schematic diagrams, not actual pictures. They should not be construed as limiting the utility model. To better illustrate the embodiments of this utility model, some components in the figures may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable that some well-known structures and their descriptions may be omitted in the figures for those skilled in the art.

[0028] In the figures of this utility model embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figure, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe the positional relationship in the figure are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above-mentioned terms can be understood according to the specific circumstances.

[0029] like Figures 1-3 As shown, this utility model discloses a scraper wear compensation device, which is installed on the fixed bracket 1 of the belt scale frame. It includes a scraper assembly for cleaning the surface of the idler roller. The scraper assembly includes a connecting plate 23, a scraper seat 21, and a scraper that abuts against the idler roller. A guide rod is fixedly connected to one side of the connecting plate 23. A sleeve is fixedly connected to the scraper seat 21. The guide rod is movably inserted into the sleeve. At least one spring buffer 4 is provided between the scraper seat 21 and the connecting plate 23 for compensating for scraper wear.

[0030] In this embodiment, the compensation device includes a compensation mechanism for compensating for the loss of elastic force of the spring buffer 4. The compensation mechanism includes a first lever arm 31 and a second lever arm 32. One end of the first lever arm 31 is fixedly connected to the connecting plate 23, and the other end is provided with a first gear. One end of the second lever arm is provided with a second gear, and the other end is used to configure a counterweight assembly that can provide tension in the vertical direction. In this embodiment, it is a downward tension. The first gear and the second gear are both rotatably connected to the fixed bracket 1 and mesh with each other, so that the first lever arm 31 and the second lever arm 32 are synchronously rotated relative to each other.

[0031] In this embodiment, the spring buffer 4 includes a piston rod 41 for connection to the scraper assembly, a cylinder 42 for connection to the second lever arm 32, and a spring assembly 43 disposed within the cylinder 42 for driving the piston rod 41. The piston rod 41 is slidably engaged with the cylinder 42, and the installation length of the spring assembly 43 is less than its initial length, thereby providing a preset elastic force. To ensure the stability of the scraper 22 pressing against the idler roller, two spring buffers 4 are provided, symmetrically distributed on both sides of the scraper assembly. To visually indicate the wear condition of the scraper 22, the cylinder 42 is a transparent cylinder 42 with scale lines 421, allowing the operator to intuitively reflect the scraper wear compensation status through the positional change of the piston head of the piston rod 41.

[0032] In this embodiment, the counterweight component is a tension spring 54. One end of the tension spring 54 is connected to the second lever arm 32, and the other end is connected to the fixed bracket. The tension spring is directly set as a counterweight component to compensate for the elasticity loss of the spring group of the balance scraper, which is simple in structure.

[0033] In practice, the counterweight assembly can also be configured as a guide rail 51 vertically fixed to the side of the fixed bracket 1. The guide rail 51 is equipped with a counterweight slider 52, and the top of the counterweight slider 52 is equipped with a vertical rod, which is connected to the end of the first lever arm. It also includes a tension spring 54, one end of which is connected to the bottom of the counterweight slider 52, and the other end is connected to the fixed bracket 1. The other end of the tension spring 54 can also be connected to an adjusting screw 55, which is threadedly connected to the support of the fixed bracket 1.

[0034] For example, the vertical rod can be connected to the end of the first lever arm in the following way: the end of the second lever arm is provided with a through groove, and a pin connected to the vertical rod is movably provided in the through groove. For example, the through groove is a long slot, and the pin can slide along the long slot. Or, as in this embodiment, the through groove is a through hole with a diameter larger than the diameter of the pin, so that the pin can move in the through hole, thereby enabling the rotation of the second lever arm and the raising and lowering of the vertical rod to be realized simultaneously.

[0035] In fact, the counterweight assembly can also be other existing devices that provide tension, such as an elastic band with a downward-facing end of the second lever arm, with several vertically arranged positioning holes below it, and a positioning rod at the end of the elastic band. By fixing different positioning holes with the positioning rod, the effective length of the elastic band can be changed, thereby adjusting the tension.

[0036] The working principle of this utility model is as follows:

[0037] This utility model adds a scraper wear compensation device without significantly altering the original structure of the electronic belt scale. When the scraper 22 wears, the gap between the scraper 22 and the idler roller increases. At this time, the piston rod 41 inside the spring buffer 4 moves to the side of the idler roller, and the spring assembly 43 extends to release a certain preset elastic force. As a result, the spring assembly 43 becomes relaxed to a certain extent, which disrupts the original balance of the compensation mechanism.

[0038] Subsequently, the second lever arm 32 rotates clockwise to compensate for the elastic force of the spring assembly 43, and the corresponding first lever arm 31 rotates counterclockwise. As a result, the counterweight slider 52 configured on the first lever arm 31 moves upward. The displacement of the counterweight slider 52 can be reduced by setting the lever ratio, and a new equilibrium state is formed, thus completing the compensation mechanism's elastic force compensation for the spring assembly 43.

[0039] The wear is precisely compensated by the spring buffer 4 and the compensation mechanism, ensuring that the scraper 22 always keeps in close contact with the idler roller surface and maintains a relatively constant pressure against the idler roller, thus guaranteeing the effectiveness of cleaning materials or dust from the idler roller surface. This solves the problem of conventional spring-compensated scrapers where the spring loses elasticity and the scraping effect deteriorates after the scraper wears, ultimately improving the stability and reliability of the electronic belt scale operation.

[0040] In addition, the dual compensation device of spring buffer 4 and compensation mechanism can also buffer the overload of the scraper. For example, when a hard object (such as a metal impurity) suddenly gets stuck between the idler roller and the scraper 22, the scraper 22 can be retracted and avoided under the action of spring buffer 4 and compensation mechanism to avoid hard damage to the idler roller and the scraper 22. Then, under the action of the gravity of the counterweight slider 52 (if a tension spring is provided, it also includes tension), the scraper 22 is restored to press against the idler roller.

[0041] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model. Technologies, shapes, and structural parts not described in detail in this utility model are all known technologies.

Claims

1. A doctor blade wear compensation device, arranged on a fixed support (1) of a belt scale machine frame, characterized in that, include: A scraper assembly for cleaning the surface of the idler roller includes a connecting plate (23), a scraper seat (21), and a scraper that abuts against the idler roller. A guide rod is fixedly connected to one side of the connecting plate (23), and a sleeve is fixedly connected to the scraper seat (21). The guide rod is movably inserted into the sleeve. At least one spring buffer (4) for compensating for scraper wear is also provided between the scraper seat (21) and the connecting plate (23). A compensation mechanism for compensating for the loss of elastic force in the spring buffer (4) includes a first lever arm (31) and a second lever arm (32). One end of the first lever arm (31) is fixedly connected to the connecting plate (23), and the other end is provided with a first gear. One end of the second lever arm (32) is provided with a second gear, and the other end is used to configure a counterweight assembly that can provide tension in the vertical direction. The first gear and the second gear are both rotatably connected to the fixed bracket (1) and mesh with each other, so that the first lever arm (31) and the second lever arm (32) are synchronously rotated relative to each other.

2. The doctor wear compensation device of claim 1, wherein: The spring buffer (4) includes a piston rod (41) for connecting to the scraper seat (21), a cylinder (42) for connecting to the connecting plate (23), and a spring assembly (43) disposed in the cylinder (42) for driving the piston rod (41). The piston rod (41) slides with the cylinder (42), and the spring assembly (43) provides a preset elastic force.

3. The doctor wear compensation device of claim 1, wherein: The number of spring buffers (4) is two, symmetrically distributed on both sides of the scraper assembly.

4. The doctor wear compensation device of claim 1, wherein: The counterweight assembly is a tension spring (54), one end of which is connected to the second lever arm (32), and the other end is connected to the fixed bracket (1).

5. The doctor wear compensation device of claim 1, wherein: The counterweight assembly includes a guide rail (51) vertically fixed to the side of the fixed bracket (1), the guide rail (51) is provided with a counterweight slider (52), the top of the counterweight slider (52) is provided with a vertical rod (53), and the vertical rod (53) is connected to the end of the second lever arm (32).

6. The doctor wear compensation device of claim 5, wherein: The end of the second lever arm (32) is provided with a through groove, and a pin connected to the vertical rod (53) is movably provided in the through groove.

7. The doctor wear compensation device of claim 5, wherein: The counterweight assembly also includes a tension spring (54), one end of which is connected to the bottom of the counterweight slider (52), and the other end is connected to the fixed bracket (1).

8. The doctor wear compensation device of claim 7, wherein: The other end of the tension spring (54) is connected to an adjusting screw (55), which is threadedly connected to the fixed bracket (1).

9. The scraper wear compensation device according to claim 2, characterized in that: The cylinder (42) is a transparent cylinder (42) with scale lines (421).

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