A detection device and method for easily adjustable passive roller linear speed.

Abstract

This invention relates to the technical field of roller linear speed detection devices, providing an easily adjustable passive roller linear speed detection device and method, comprising: a positioning and clamping mechanism, which includes a worm gear ring driven by a worm, a gear ring, and multiple circumferentially evenly distributed clamping components. Its coupling pushes the outer sleeve of the linkage component, which in turn drives the worm to rotate via the gear plate and linkage gear. The worm drives the worm gear ring and gear ring to rotate, ultimately synchronously driving the racks of all clamping components to move radially inward, so that the triangular inserts at their ends precisely engage with the clamping cavities on the coupling, while the positioning rod inserts into the positioning hole, achieving automatic centering and secure clamping. Precise centering and multi-point secure clamping between the encoder and the roller can be automatically completed through a single linear propulsion action, avoiding the cumbersome centering adjustments and potential misalignment problems in traditional installation, significantly improving installation efficiency and reliability, and providing a stable mechanical connection for contact speed measurement.

Description

Technical Field

[0001] This invention belongs to the technical field of roller speed detection devices, and particularly relates to a passive roller speed detection device and detection method that is easy to adjust. Background Technology

[0002] In industrial production, especially in fields involving the continuous conveying and processing of strip materials (such as films, paper, and metal strips), accurate detection of the linear speed of passive rollers in conveyor belts is crucial. Accurate linear speed data is the foundation for tension control, synchronous drive, length measurement, and quality control, directly affecting the stability of the production process and the quality of the final product. Currently, there are two main technical solutions for detecting the linear speed of passive rollers: contact speed measurement and non-contact speed measurement.

[0003] Non-contact speed measurement solutions typically involve mounting a detection block (such as a metal protrusion) on the end face or circumference of the roller, and correspondingly installing a proximity switch or photoelectric sensor on a fixed frame. When the roller rotates, the sensor calculates the rotational speed by sensing the frequency of pulses passing through the detection block. The advantage of this method is its relatively simple installation and the absence of mechanical contact with the roller, thus eliminating wear issues. However, its disadvantages are also significant: firstly, the detection accuracy is easily affected by environmental interference (such as the influence of dust and oil on the photoelectric sensor, or electromagnetic interference on the proximity switch); secondly, at low or extremely high speeds, the pulse signal may be lost or distorted, leading to inaccurate measurements.

[0004] Contact-type speed measurement solutions primarily employ a direct connection between the encoder and the driven roller shaft via a coupling. Theoretically, this method offers higher measurement accuracy and response speed. In existing technologies, encoders are typically connected via simple rigid couplings or friction wheel mechanisms, requiring meticulous manual alignment during installation to ensure perfect concentricity between the encoder shaft and the roller shaft. Any minute misalignment will generate additional stress during operation, leading to coupling wear, encoder shaft damage, and, more seriously, slippage at the connection point. This prevents the encoder from accurately reflecting the actual roller speed, resulting in severely inaccurate measurement data. Furthermore, this installation method is time-consuming and labor-intensive to adjust, and extremely inconvenient when maintenance or encoder replacement is needed.

[0005] In summary, the existing passive roller linear speed detection devices have the following significant shortcomings:

[0006] Inconvenient installation and adjustment, and difficulty in ensuring alignment accuracy: In contact speed measurement, the reliable connection between the encoder and the roller shaft depends heavily on the precise adjustment by skilled workers, which is inefficient and makes it difficult to guarantee the alignment accuracy of each installation, thus creating hidden dangers for measurement errors and equipment failures.

[0007] Low reliability of single measurement mode: Whether it is contact or non-contact, the measurement results of a single sensor cannot be self-verified. Once a fault occurs, the system will not know it and it is easy to cause production accidents.

[0008] Therefore, there is an urgent need for a passive roller linear speed detection device that can effectively solve the above problems and integrates rapid installation, precise alignment, reliable connection and dual verification. Summary of the Invention

[0009] This invention provides an easily adjustable detection device and method for passive roller linear speed, aiming to solve the problems of inconvenient installation and adjustment, difficulty in ensuring centering accuracy, and low reliability of single measurement mode in current passive roller linear speed detection devices.

[0010] The present invention is implemented as follows: a passive roller linear speed detection device that is easy to adjust includes a frame and a rotating roller rotatably connected to the frame. A non-contact speed measuring component is provided on one side of the frame for detecting the rotation speed of the rotating roller.

[0011] A contact speed measuring component is provided on one side of the frame. The contact speed measuring component is connected to one end of the rotating roller through a positioning and clamping mechanism. The contact speed measuring component and the positioning and clamping mechanism are used to further detect the rotation speed of the rotating roller.

[0012] The positioning and clamping mechanism includes a linkage component, an outer frame, a transmission component, several fixing plates, and several clamping assemblies. The outer frame is disposed on one side of the frame, and the fixing plates are disposed between the outer frame and the frame to support the outer frame. Several clamping assemblies are arranged in a circular array on the outer frame. The transmission component is rotatably disposed on the outer frame, and the linkage component is disposed on one side of the transmission component to drive the transmission component to rotate, thereby enabling the transmission component to synchronously drive several clamping assemblies.

[0013] The outer frame includes a bottom ring plate fixedly connected to a fixed plate, and an outer ring plate is provided on one side of the bottom ring plate. A guide rail cavity is formed between the outer ring plate and the bottom ring plate, and the bottom ring plate and the outer ring plate are fixedly connected by a connector.

[0014] The transmission component includes a rotating ring rotatably sleeved inside the guide rail cavity. A worm gear ring is fixedly connected to the outer circumference of the rotating ring, and a gear ring is fixedly connected to the inner circumference of the rotating ring. A plurality of gear columns are meshed and connected to the inner side of the gear ring, and the gear columns are rotatably connected to the outer wall of the bottom ring plate.

[0015] The number of clamping components is consistent with the number of gear columns and corresponds one-to-one. Each clamping component includes a rack that slides through the inner part of the outer ring plate. The rack meshes with the gear columns, and a triangular insert is fixedly connected to one end of the rack.

[0016] The linkage component includes a bracket fixed to the outer wall of one of the fixed plates. A worm gear meshing with the worm ring is rotatably connected to the inner side of the bracket. A linkage gear is provided on both sides of the bracket. The linkage gear is coaxially fixed to the worm gear. A toothed plate is meshed on the upper side of both linkage gears. A vertical rod is fixed to one end of the toothed plate. A T-shaped block is fixed to one side of the vertical rod. T-shaped grooves are opened on both sides of the fixed plate. The T-shaped grooves and the T-shaped blocks are slidably fitted together.

[0017] The linkage component further includes an inner column and an outer sleeve that is slidably fitted on the outer wall of the inner column. A spring is connected between the outer sleeve and the inner column. A plurality of positioning holes are opened at one end of the outer sleeve. The inner column is fixedly connected to the fixing plate by a reinforcing plate. The upright is fixedly connected to the outer sleeve.

[0018] The contact speed measuring component includes a fixed frame fixed to the side wall of the frame, a bracket fixed to the top of the fixed frame, a movable platform slidably disposed on the upper side of the bracket, a guide rod and a screw slidably disposed through the inner side of the movable platform, the screw being threadedly connected to the movable platform, the guide rod being slidably connected to the movable platform, the screw being rotatably connected to the bracket, and the guide rod being fixed to the bracket;

[0019] An encoder is mounted on the upper side of the mobile platform. Several positioning rods that cooperate with the positioning holes are fixed to the end of the coupling on the encoder. Several cavities that cooperate with the triangular inserts are opened on the outer wall of the coupling.

[0020] The non-contact speed measuring component includes a detection block installed on the outer wall of one end of the roller, and a proximity switch installed on the side wall of the frame is provided on one side of the detection block.

[0021] The detection method for the easily adjustable passive roller linear speed using a detection device includes the following steps:

[0022] Step 1: Fix the detection block to one side wall of the rotating roller by welding or bolting, and install the proximity switch on the side wall of the frame. The rotating roller drives the detection block to revolve. Whenever the detection block passes the sensing surface of the proximity switch, it will enter its effective detection range.

[0023] Step 2: Fix the mounting bracket to the side wall of the frame with bolts so that the encoder can be stably placed on one side of the frame. Fix several mounting plates to the end of the roller with bolts so that the positioning and clamping mechanism can be stably placed on one side of the roller.

[0024] Step 3: Connect the coupling on the encoder to the clamping component on the positioning and clamping mechanism, move the encoder closer to the positioning and clamping mechanism, and push the outer sleeve through the coupling on the encoder so that the outer sleeve slides on the outer wall of the inner column;

[0025] Step 4: While the outer sleeve slides along the outer wall of the inner column, the toothed plate moves linearly through the upright rod, and the transmission components are driven by the worm gear and the linkage gear.

[0026] Step 5: During the process of the transmission component being driven, the transmission component can also drive several clamping components synchronously. When several clamping components approach each other synchronously, they can clamp and limit the coupling on the encoder through the triangular plug at their ends.

[0027] Step Six: During the rotation of the roller, the positioning and clamping mechanism can drive the coupling to rotate, and the speed of the roller can be detected by the encoder.

[0028] Compared with related technologies, the passive roller linear speed detection device and detection method provided by the present invention have the following advantages:

[0029] 1. The linkage-type positioning and clamping mechanism achieves rapid and precise docking and synchronous drive. This device utilizes a mechanical linkage system to connect the contact speed measuring component (encoder) and the end of the driven roller. The positioning and clamping mechanism includes a worm gear ring driven by a worm, a gear ring, and multiple circumferentially evenly distributed clamping components. When the encoder is pushed forward by the screw, its coupling pushes the outer sleeve of the linkage component, which in turn drives the worm to rotate through the gear plate and linkage gear. The worm drives the worm gear ring and gear ring to rotate, ultimately synchronously driving the racks of all clamping components to move radially inward, so that the triangular inserts at their ends precisely engage with the clamping cavities on the coupling. Simultaneously, the positioning rod inserts into the positioning hole, achieving automatic centering and secure clamping. This linkage design simplifies the installation and debugging process. A single linear pushing action can automatically complete the precise centering and multi-point secure clamping of the encoder and the rotating roller, avoiding the cumbersome centering and debugging and potential misalignment problems in traditional installation. This significantly improves installation efficiency and reliability, providing a stable mechanical connection for contact speed measurement and fundamentally reducing measurement errors or slippage caused by poor connection.

[0030] 2. Dual-mode speed measurement technology integration and redundancy verification enhance system reliability. This device integrates both non-contact and contact speed measurement methods. The non-contact speed measurement component consists of a detection block mounted on the end face of the roller and a proximity switch fixed to the frame, measuring speed through pulse counting. The contact speed measurement component is directly connected to the end of the roller via the aforementioned linkage clamping mechanism, measuring the rotational speed through an encoder. Both methods independently measure the rotational speed of the same passive roller: operators can compare the speed values ​​measured by the two systems; if the results are consistent, they mutually verify the accuracy of the measurement; if significant differences occur (e.g., contact measurement becomes inaccurate due to accidental slippage), the system can promptly issue an alarm, indicating maintenance needs. This effectively avoids misjudgments or monitoring blind spots caused by a single sensor failure or malfunction, greatly improving the reliability and trustworthiness of the entire speed monitoring system, providing dual protection for preventing equipment failure and ensuring product quality. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of the contact speed measuring component of the present invention;

[0033] Figure 3 This is a schematic diagram of the assembly structure of the positioning and clamping mechanism of the present invention;

[0034] Figure 4 This is a schematic diagram of the coupling and triangular insert assembly structure of the present invention;

[0035] Figure 5 This is a schematic diagram of the structure of the linkage component of the present invention;

[0036] Figure 6 This is a schematic diagram of the internal structure of the outer casing of the present invention;

[0037] Figure 7 This is a partial cross-sectional view of the outer frame of the present invention;

[0038] Figure 8 This is a three-dimensional structural diagram of the transmission component of the present invention.

[0039] In the diagram: 1. Rotary roller; 2. Frame; 3. Non-contact speed measuring component; 31. Detection block; 32. Proximity switch; 4. Contact speed measuring component; 41. Fixed frame; 42. Bracket; 43. Moving stage; 44. Screw; 45. Guide rod; 46. Encoder; 461. Coupling; 462. Positioning rod; 463. Clamping cavity; 5. Positioning and clamping mechanism; 51. Clamping component; 511. Rack; 512. Triangular insert; 52. Outer frame; 521. Bottom ring plate 522. Outer ring plate; 523. Connector; 524. Guide rail cavity; 53. Transmission component; 531. Rotating ring; 532. Worm gear ring; 533. Gear ring; 534. Gear column; 54. Fixing plate; 55. Linkage component; 551. Reinforcing plate; 552. Inner column; 553. Outer sleeve; 5531. Positioning hole; 554. T-slot; 555. Upright pole; 556. Bracket; 557. Worm; 558. Gear plate; 559. Linkage gear. Detailed Implementation

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0041] 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. Example 1

[0042] A preferred embodiment of the easily adjustable passive roller linear speed detection device and detection method provided by the present invention is as follows: Figure 1 As shown: The device includes a frame 2 and a rotating roller 1 rotatably connected to the frame 2. A non-contact speed measuring component 3 is provided on one side of the frame 2 for detecting the rotation speed of the rotating roller 1. The non-contact speed measuring component 3 includes a detection block 31 installed on the outer wall of one end of the rotating roller 1, and a proximity switch 32 installed on the side wall of the frame 2 is provided on one side of the detection block 31.

[0043] In this embodiment, the detection block 31 is fixedly installed on one side wall of the rotating roller 1 by welding or bolting, and the proximity switch 32 is installed on the side wall of the frame 2. The rotating roller 1 drives the detection block 31 to revolve. Whenever the detection block 31 passes the sensing surface of the proximity switch 32, it enters its effective detection range. The high-frequency magnetic field generated by the oscillator inside the proximity switch 32 induces eddy current effects in the metal detection block 31, causing the oscillation to decay or stop. This change is captured and converted by the subsequent circuit, outputting a clear pulse signal. The pulse signal generated by the proximity switch 32 is sent to the high-speed counter input point of the PLC (Programmable Logic Controller). The PLC program accurately counts the number of pulses received within a fixed time interval (e.g., 1 second). The number of pulses per unit time is equal to the number of rotations of the roller multiplied by the number of pulses per rotation, thus obtaining the rotational speed of the roller 1. This is prior art in the field and will not be described in detail here. Example 2

[0044] Based on Example 1, a preferred embodiment of the passive roller linear speed detection device and detection method that is easy to adjust provided by the present invention is as follows: Figures 1 to 8 As shown: A contact speed measuring component 4 is provided on one side of the frame 2. The contact speed measuring component 4 is connected to one end of the rotating roller 1 through a positioning and clamping mechanism 5. The contact speed measuring component 4 and the positioning and clamping mechanism 5 are used to further detect the rotation speed of the rotating roller 1. The positioning and clamping mechanism 5 includes a linkage component 55, an outer frame 52, a transmission component 53, several fixing plates 54, and several clamping components 51. The outer frame 52 is located on one side of the frame 2. The fixing plates 54 are located between the outer frame 52 and the frame 2 to support the outer frame 52. Several clamping components 51 are distributed in a circular array on the outer frame 52. The transmission component 53 is rotatably mounted on the outer frame 52. The linkage component 55 is located on one side of the transmission component 53 to rotate the transmission component 53, thereby enabling the transmission component 53 to synchronously drive the several clamping components 51.

[0045] Specifically, the outer frame 52 includes a bottom ring plate 521 fixedly connected to the fixed plate 54. An outer ring plate 522 is provided on one side of the bottom ring plate 521. A guide cavity 524 is formed between the outer ring plate 522 and the bottom ring plate 521. The bottom ring plate 521 and the outer ring plate 522 are fixedly connected by a connector 523.

[0046] Specifically, the transmission component 53 includes a rotating ring 531 rotatably sleeved inside the guide rail cavity 524, a worm gear ring 532 fixedly connected to the outer circumference of the rotating ring 531, a gear ring 533 fixedly connected to the inner circumference of the rotating ring 531, and a plurality of gear columns 534 meshingly connected to the inner side of the gear ring 533, and the gear columns 534 rotatably connected to the outer wall of the bottom ring plate 521.

[0047] Specifically, the number of clamping components 51 is the same as the number of gear columns 534 and they correspond one-to-one. The clamping component 51 includes a rack 511 that slides through the inner ring plate 522. The rack 511 meshes with the gear column 534, and a triangular insert 512 is fixedly connected to one end of the rack 511.

[0048] Specifically, the linkage component 55 includes a bracket 556 fixed to the outer wall of one of the fixed plates 54. A worm 557 that meshes with the worm gear ring 532 is rotatably connected to the inner side of the bracket 556. A linkage gear 559 is provided on both sides of the bracket 556. The linkage gear 559 is coaxially fixed to the worm 557. A toothed plate 558 is meshed on the upper side of both linkage gears 559. A vertical rod 555 is fixed to one end of the toothed plate 558. A T-shaped block is fixed to one side of the vertical rod 555. T-slots 554 are opened on both sides of the fixed plate 54. The T-slots 554 and the T-shaped blocks are slidably fitted together. The linkage component 55 also includes an inner column 552 and an outer sleeve 553 that is slidably sleeved on the outer wall of the inner column 552. A spring is connected between the outer sleeve 553 and the inner column 552. A number of positioning holes 5531 are opened at one end of the outer sleeve 553. The inner column 552 is fixedly connected to the fixing plate 54 through a reinforcing plate 551. The upright 555 is fixedly connected to the outer sleeve 553.

[0049] Specifically, the contact speed measuring component 4 includes a fixed frame 41 fixed to the side wall of the frame 2. A bracket 42 is fixed to the top of the fixed frame 41. A movable platform 43 is slidably arranged on the upper side of the bracket 42. A guide rod 45 and a screw 44 are slidably arranged through the inner side of the movable platform 43. The screw 44 is threadedly connected to the movable platform 43, the guide rod 45 is slidably connected to the movable platform 43, the screw 44 is rotatably connected to the bracket 42, and the guide rod 45 is fixed to the bracket 42. An encoder 46 is installed on the upper side of the movable platform 43. Several positioning rods 462 that cooperate with positioning holes 5531 are fixed to the end of the coupling 461 on the encoder 46. Several retaining cavities 463 that cooperate with triangular inserts 512 are opened on the outer wall of the coupling 461.

[0050] In this embodiment, the fixing frame 41 is fixedly installed on the side wall of the frame 2 by bolts, so that the encoder 46 can be stably placed on one side of the frame 2. Several fixing plates 54 are fixed to the end of the rotating roller 1 by bolts, so that the positioning clamping mechanism 5 can be stably placed on one side of the rotating roller 1. The coupling 461 on the encoder 46 is connected to the clamping component 51 on the positioning clamping mechanism 5. The screw 44 is rotated, so that the moving stage 43 slides along the outer wall of the guide rod 45, and the encoder 46 is moved closer to the positioning clamping mechanism 5. The positioning rod 462 at the end of the coupling 461 is inserted into the positioning hole 5531 at the end of the outer sleeve 553. The outer sleeve 553 is pushed by the coupling 461 on the encoder 46, so that the outer sleeve 553 slides on the outer wall of the inner column 552, and the spring on the inner side of the outer sleeve 553 is compressed.

[0051] In this embodiment, while the outer sleeve 553 slides along the outer wall of the inner column 552, the toothed plate 558 can move linearly via the upright rod 555. The toothed plate 558 rotates the linkage gear 559, which in turn drives the worm gear 557 to rotate. The worm gear 557 drives the worm wheel ring 532, causing the rotating ring 531 to rotate inside the guide rail cavity 524. The rotating ring 531 drives the gear ring 533 to rotate, and the gear ring 533 drives several gear columns 534 to rotate synchronously. Since the gear columns 534 mesh with the rack 511, the gear columns 534 can push the rack 511 during rotation, allowing several racks 511 to move synchronously and approach each other. The triangular insert 512 at the end of the rack 511 can be inserted into the retaining cavity 463 opened on the outer wall of the coupling 461, so that the triangular insert 512 and the retaining cavity 463 are pressed and fitted together. This allows the rotating roller 1 to drive the positioning and clamping mechanism 5 to rotate during its rotation, and the positioning and clamping mechanism 5 to drive the coupling 461 to rotate, thereby enabling the encoder 46 to detect the rotation speed of the rotating roller 1.

[0052] It is worth noting that the circuits, electronic components, and modules involved in this invention are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this invention does not involve improvements to the software and methods.

[0053] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units described above is only a logical functional division for a passive roller speed detection device and method that facilitates adjustment. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. A passive roller linear speed detection device that is easy to adjust, comprising a frame (2) and a rotating roller (1) rotatably connected to the frame (2), characterized in that, A non-contact speed measuring component (3) is provided on one side of the frame (2) for detecting the rotation speed of the roller (1); A contact speed measuring component (4) is provided on one side of the frame (2). The contact speed measuring component (4) is connected to one end of the rotating roller (1) through a positioning clamping mechanism (5). The contact speed measuring component (4) and the positioning clamping mechanism (5) are used to further detect the rotation speed of the rotating roller (1). The positioning and clamping mechanism (5) includes a linkage component (55), an outer frame (52), a transmission component (53), several fixing plates (54), and several clamping assemblies (51). The outer frame (52) is disposed on one side of the frame (2). The fixing plates (54) are disposed between the outer frame (52) and the frame (2) to support the outer frame (52). Several clamping assemblies (51) are arranged in a circular array on the outer frame (52). The transmission component (53) is rotatably disposed on the outer frame (52). The linkage component (55) is disposed on one side of the transmission component (53) to drive the transmission component (53) to rotate, thereby enabling the transmission component (53) to synchronously drive the several clamping assemblies (51). The outer frame (52) includes a bottom ring plate (521) fixedly connected to the fixing plate (54). An outer ring plate (522) is provided on one side of the bottom ring plate (521). A guide cavity (524) is formed between the outer ring plate (522) and the bottom ring plate (521). The bottom ring plate (521) and the outer ring plate (522) are fixedly connected by a connector (523). The transmission component (53) includes a rotating ring (531) rotatably sleeved inside the guide rail cavity (524), a worm gear ring (532) fixedly connected to the outer circumference of the rotating ring (531), a gear ring (533) fixedly connected to the inner circumference of the rotating ring (531), and a plurality of gear columns (534) meshingly connected to the inner side of the gear ring (533), and the gear columns (534) rotatably connected to the outer wall of the bottom ring plate (521); The number of clamping components (51) is the same as the number of gear columns (534) and they correspond one-to-one. Each clamping component (51) includes a rack (511) that slides through the inner part of the outer ring plate (522). The rack (511) meshes with the gear column (534), and a triangular insert (512) is fixedly connected to one end of the rack (511). The linkage component (55) includes a bracket (556) fixed to the outer wall of one of the fixed plates (54). A worm (557) meshing with the worm gear ring (532) is rotatably connected to the inner side of the bracket (556). A linkage gear (559) is provided on both sides of the bracket (556). The linkage gear (559) is coaxially fixed to the worm (557). A toothed plate (558) is meshed on the upper side of both linkage gears (559). A vertical rod (555) is fixed to one end of the toothed plate (558). A T-shaped block is fixed to one side of the vertical rod (555). T-shaped grooves (554) are opened on both sides of the fixed plate (54). The T-shaped grooves (554) are slidably fitted to the T-shaped block. The linkage component (55) further includes an inner column (552) and an outer sleeve (553) that is slidably sleeved on the outer wall of the inner column (552). A spring is connected between the outer sleeve (553) and the inner column (552). A plurality of positioning holes (5531) are opened at one end of the outer sleeve (553). The inner column (552) is fixedly connected to the fixing plate (54) through a reinforcing plate (551). The upright (555) is fixedly connected to the outer sleeve (553). The contact speed measuring assembly (4) includes a fixed frame (41) fixed to the side wall of the frame (2), a bracket (42) fixed to the top of the fixed frame (41), a movable platform (43) slidably disposed on the upper side of the bracket (42), a guide rod (45) and a screw (44) slidably disposed through the inner side of the movable platform (43), the screw (44) being threadedly connected to the movable platform (43), the guide rod (45) being slidably connected to the movable platform (43), the screw (44) being rotatably connected to the bracket (42), and the guide rod (45) being fixedly disposed to the bracket (42). An encoder (46) is installed on the upper side of the mobile stage (43). The end of the coupling (461) on the encoder (46) is fixed with several positioning rods (462) that cooperate with the positioning hole (5531). Several cavities (463) that cooperate with the triangular insert (512) are opened on the outer wall of the coupling (461).

2. The detection device for the easily adjustable passive roller linear speed as described in claim 1, characterized in that, The non-contact speed measuring component (3) includes a detection block (31) installed on the outer wall of one end of the rotating roller (1), and a proximity switch (32) installed on the side wall of the frame (2) is provided on one side of the detection block (31).

3. The detection method of the detection device for the easily adjustable passive roller linear speed as described in claim 2, characterized in that, Includes the following steps: Step 1: Fix the detection block (31) to one side wall of the rotating roller (1) by welding or bolting, and install the proximity switch (32) on the side wall of the frame (2). The rotating roller (1) drives the detection block (31) to revolve. Whenever the detection block (31) passes the sensing surface of the proximity switch (32), it will enter its effective detection range. Step 2: Fix the fixing frame (41) to the side wall of the frame (2) with bolts so that the encoder (46) can be stably placed on one side of the frame (2), and fix several fixing plates (54) to the end of the roller (1) with bolts so that the positioning clamping mechanism (5) can be stably placed on one side of the roller (1); Step 3: Connect the coupling (461) on the encoder (46) to the clamping assembly (51) on the positioning and clamping mechanism (5), move the encoder (46) closer to the positioning and clamping mechanism (5), and push the outer sleeve (553) through the coupling (461) on the encoder (46) so that the outer sleeve (553) slides on the outer wall of the inner column (552); Step 4: While the outer sleeve (553) slides along the outer wall of the inner column (552), the toothed plate (558) moves linearly through the upright (555), and the transmission component (53) is driven by the worm gear (557) and the linkage gear (559). Step 5: During the process of the transmission component (53) being driven, the transmission component (53) can also drive several clamping components (51) synchronously. When several clamping components (51) approach each other synchronously, they can clamp and limit the coupling (461) on the encoder (46) through the triangular plug (512) at their ends. Step 6: During the rotation of the roller (1), the coupling (461) can be driven to rotate by the positioning clamping mechanism (5), and the speed of the roller (1) can be detected by the encoder (46).

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