Long-acting dustproof roller grinder measuring device

Abstract

The application relates to a long-term dustproof roll grinder measuring device, and belongs to the technical field of measuring devices. The device comprises two measuring rods and a driving mechanism connected with the two measuring rods, further comprises a protective shell mechanism, the protective shell mechanism comprises a protective box seat and a box cover detachably fixed with the protective box seat, the measuring rod driving mechanism is arranged in the protective shell mechanism, a parking slot for the two measuring rods to pass out and move is arranged at one side of the protective box seat close to the position of one end of the box cover, a dustproof mechanism is arranged at the parking slot, the dustproof mechanism comprises a dustproof belt, one end of the dustproof belt is detachably fixed with one end of the parking slot, a tensioning mechanism is arranged at the position of the other end of the parking slot, and the other end of the dustproof belt is detachably connected with the tensioning mechanism. The dustproof belt arranged at the parking slot is fixedly connected at one end and connected with the tensioning mechanism at the other end, so that the dustproof belt can always adhere to the parking slot, and the long-term operation reliability and service life of the measuring device are improved.

Description

Technical Field

[0001] This application relates to the field of measuring devices, and more particularly to a long-lasting dustproof measuring device for a roll grinding machine. Background Technology

[0002] Grinding machines are important supporting equipment in steel plate rolling production lines. During the production process, measuring devices are needed to measure the parameters of the rolls in order to control the precision machining of the rolls by the grinding machine.

[0003] To ensure the accuracy of parameter measurement for roll grinding machines, Chinese Patent No. CN202894994U discloses a measurement mechanism for CNC roll grinding machines. The mechanism includes a base that can move along a horizontal guide rail, a rotatable vertical shaft, a measuring arm panel with a vertical guide rail, and upper and lower measuring arms that can move along the vertical guide rail. The measuring arms are driven to move by a sprocket, chain, and linear motor, thus realizing online measurement functionality.

[0004] Regarding the aforementioned technical solution, the inventors believe that the transmission mechanism of the measuring arm, such as key components like sprockets, chains, and guide rails, is directly exposed on the fixed panel, lacking effective protection. This open structure is highly susceptible to impact damage in complex industrial environments and easily accumulates dust, oil, or moisture. Long-term use can lead to decreased transmission accuracy, accelerated wear of components, and even malfunctions, resulting in poor overall protection and severely impacting the lifespan and reliability of the measuring device. Furthermore, the sprocket and chain transmission mode obviously has low transmission accuracy, further affecting the device's measurement accuracy. Summary of the Invention

[0005] In order to improve the dustproof effect of the measuring device and thus ensure long-term measurement accuracy and service life, this application provides a long-lasting dustproof measuring device for roll grinding machines.

[0006] This application provides a long-lasting dustproof measuring device for a roll grinding machine, which adopts the following technical solution:

[0007] A long-lasting dustproof measuring device for a roll grinding machine includes two measuring rods and a drive mechanism connected to the two measuring rods. It also includes a protective cover mechanism, which includes a protective housing base and a cover detachably fixed to the protective housing base. The measuring rod drive mechanism is located within the protective cover mechanism. A clearance groove is provided on one side of the protective housing base near the cover, allowing the two measuring rods to pass through and move. A dustproof mechanism is provided at the clearance groove, including a dustproof belt. One end of the dustproof belt is detachably fixed to one end of the clearance groove, and a tensioning mechanism is provided at the other end of the clearance groove. The other end of the dustproof belt is detachably connected to the tensioning mechanism.

[0008] Optionally, the tensioning mechanism includes a tensioning roller and a central shaft assembly coaxially fixed to the tensioning roller. The central shaft assembly is rotatably connected to the protective housing base. The axial direction of the central shaft assembly is the same as the width direction of the dustproof belt. The tensioning roller is a hollow roller with a strip groove on its roller surface. One end of the dustproof belt passes through the strip groove and is fixed to the central shaft assembly.

[0009] Optionally, the central shaft assembly includes a fixed semi-circular shaft and a movable semi-circular shaft that can be spliced ​​together, as well as a clamping member for clamping the fixed semi-circular shaft and the movable semi-circular shaft. The fixed semi-circular shaft is coaxially fixed with the tension roller, and the movable semi-circular shaft is slidably connected to the tension roller in a direction perpendicular to the splicing surface of the central shaft assembly. Both ends of the tension roller are provided with clearance grooves for the movable semi-circular shaft to slide. Each of the fixed semi-circular shaft and the movable semi-circular shaft is provided with a pressing groove on its opposite side. The pressing groove is connected to the strip groove, and one end of the dustproof belt is pressed between the two pressing grooves.

[0010] Optionally, the clamping component includes a clamping nut and a clamping ring. The section of the central shaft assembly extending out of the tension roller and near the cover has an outwardly protruding external thread section. The clamping nut is threaded onto the external thread section. The protective housing has a through hole. The section of the central shaft assembly away from the cover passes through the through hole and connects to the clamping ring. The end of the clamping ring near the through hole abuts against the outer side of the protective housing.

[0011] Optionally, the clamping ring is provided with a ball bearing on the side near the through hole, and the ball bearing abuts against the outer side of the protective housing.

[0012] Optionally, both the fixed and movable semi-circular shafts have axial grooves on their outer sides away from the cover. The inner ring of the clamping ring has inner locking teeth that are adapted to the axial grooves. The outer section of the fixed and movable semi-circular shafts away from the cover has an arc-shaped locking groove extending circumferentially along the central shaft assembly. The arc-shaped locking groove is connected to the corresponding axial groove, and the inner locking teeth are engaged in the arc-shaped locking groove after passing through the axial groove.

[0013] Optionally, the end of the arc-shaped groove closest to the corresponding axial groove is its own inlet end, and the side of the inner locking tooth away from the inlet end of the corresponding arc-shaped groove is provided with a guide chamfer.

[0014] Optionally, the section of the central shaft assembly away from the cover is further provided with an angle locking mechanism for locking the tensioning mechanism at an angle after tensioning.

[0015] Optionally, the angle locking mechanism includes a ratchet, a pawl, and an elastic element that provides elastic force to the ratchet. The ratchet is sleeved on the section of the central shaft assembly away from the cover. The inner ring of the ratchet is provided with a limiting part that matches the axial groove. The circumferential side wall of the section of the central shaft assembly away from the cover is also provided with an annular groove. A retaining spring is provided in the annular groove. The ratchet is located between the clamping ring and the retaining spring. The pawl is rotatably connected to the protective box base, and the pawl's pawl is engaged in the ratchet teeth of the ratchet.

[0016] Optionally, the box cover has a positioning hole on the side near the protective box base, and the central shaft assembly is rotatably disposed in the positioning hole at one end near the box cover.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] 1. By setting up a protective casing mechanism and sealing the measuring rod drive mechanism inside, a sealed space isolated from the external environment is constructed, protecting the core transmission components from dust, oil, moisture, and accidental impacts. The dustproof belt installed at the clearance groove, combined with a fixed connection at one end and a tensioning mechanism at the other, forms an adjustable dynamic sealing interface. This basic structure ensures that the dustproof belt always fits snugly against the clearance groove, effectively blocking the main channels for contaminant intrusion, significantly reducing the risk of abnormal wear and corrosion of the transmission components, and greatly improving the long-term operational reliability, measurement accuracy stability, and overall service life of the measuring device in harsh industrial environments.

[0019] 2. By disassembling the central shaft assembly into two combinable semi-circular shafts—a fixed semi-circular shaft and a movable semi-circular shaft—and securing them with clamps, the installation and replacement process of the dustproof belt is simplified. During installation, simply place the end of the dustproof belt between the clamping grooves of the two semi-circular shafts, then slide the movable semi-circular shaft to align with the fixed semi-circular shaft, and finally tighten it with the clamps. This process is simple and can be completed without special tools. The clamping grooves on the two semi-circular shafts work together to generate a uniform and strong clamping force on the dustproof belt, preventing it from slipping off under tension. This combinable design solves the problem of the dustproof belt end being difficult to insert into a fixed position, improving the maintainability of the equipment.

[0020] 3. The angle locking mechanism provides a positive rotational limit for the tensioned central shaft assembly, preventing it from rotating in the opposite direction under external force or the rebound force of the dustproof belt. This means that once the dustproof belt tension is adjusted and locked by the angle locking mechanism, the set tension will be reliably maintained without relying on continuous friction. This fundamentally solves the problem of tension decay during the service life of the dustproof belt, ensuring the long-term stability of the dustproof sealing effect. Attached Figure Description

[0021] Figure 1 This is an exploded view of the overall structure of a long-lasting dustproof measuring device for a roll grinding machine according to an embodiment of this application.

[0022] Figure 2 This is a structural schematic diagram illustrating the dustproof mechanism and protective housing in the embodiments of this application.

[0023] Figure 3 This is an exploded view showing the connection relationship between the tensioning mechanism and the angle locking mechanism in the embodiments of this application.

[0024] Figure 4 This is a schematic diagram illustrating the structure of the box cover in the embodiments of this application.

[0025] Figure 5 This is a cross-sectional view illustrating the internal structure of the tension roller in the embodiments of this application.

[0026] Figure 6 This is an exploded view showing the assembly relationship between the central shaft assembly and the angle locking mechanism in the embodiments of this application.

[0027] Figure 7 This is a schematic diagram illustrating the structure of the protective box base in the embodiments of this application.

[0028] Figure 8 This is a schematic diagram illustrating the structure of the back side of the protective box in the embodiments of this application.

[0029] Figure 9 yes Figure 8 A magnified view of a portion of point A in the middle.

[0030] Figure 10 This is a schematic diagram illustrating the structure of the clamping ring in the embodiments of this application.

[0031] Figure 11 yes Figure 6 A magnified view of a portion of point B in the middle.

[0032] Explanation of reference numerals in the attached drawings: 1. Measuring rod; 2. Drive mechanism; 21. Moving seat; 3. Protective cover mechanism; 31. Protective housing base; 311. Clearance groove; 312. Through hole; 313. Mounting plate; 3131. Fixing plate; 32. Box cover; 321. Positioning hole; 4. Dustproof mechanism; 41. Dustproof belt; 42. Roller assembly; 421. Roller body; 5. Tensioning mechanism; 51. Tensioning roller; 511. Strip groove; 512. Clearance groove; 52. Central shaft assembly; 521. Fixed semi-circular shaft 522. Movable semi-circular shaft; 523. Clamping component; 5231. Clamping nut; 5232. Clamping ring; 5233. Ball bearing; 5234. Internal retaining tooth; 5235. Guide chamfer; 524. Pressing groove; 5241. Anti-slip surface; 525. External thread section; 526. Axial groove; 527. Arc-shaped retaining groove; 528. Annular groove; 5281. Snap ring; 6. Angle locking mechanism; 61. Ratchet; 611. Limiting part; 612. Rotating handle; 62. Pawl; 63. Elastic component. Detailed Implementation

[0033] The following combination Figures 1-11 This application will be described in further detail below. Example

[0034] This application discloses a long-lasting dustproof measuring device for a roll grinding machine. (Refer to...) Figure 1 A long-lasting dustproof measuring device for a roll grinding machine includes two measuring rods 1 and a drive mechanism 2 connected to the two measuring rods 1. It also includes a protective cover mechanism 3. The protective cover mechanism 3 includes a protective housing 31 and a cover 32 that is detachably fixed to the protective housing 31 by bolts / screws. The drive mechanism 2 is located inside the protective cover mechanism 3. A clearance groove 311 is provided on one side of the protective housing 31 and at one end near the cover 32, allowing the two measuring rods 1 to pass through and move.

[0035] Reference Figure 2 The drive mechanism 2 is a bidirectional lead screw drive module. Each of the two nuts on the bidirectional lead screw drive module has a movable seat 21 fixedly connected to it, and each measuring rod 1 is mounted on its corresponding movable seat 21. The bidirectional lead screw drive module can drive the two movable seats 21 to move synchronously towards or away from each other, thereby driving the two measuring rods 1 to move synchronously towards or away from each other, and thus adjusting the distance between the two measuring rods 1.

[0036] Reference Figure 1 and Figure 2To further enhance the protective effect of the measuring device, a dustproof mechanism 4 is provided at the clearance groove 311. The dustproof mechanism 4 includes a dustproof belt 41 and roller assemblies 42 respectively disposed on two movable seats 21. The dustproof belt 41 is located inside the clearance groove 311, and the width of the dustproof belt 41 is slightly larger than the width of the clearance groove 311. To facilitate the replacement or cleaning of the dustproof belt 41, one end of the dustproof belt 41 is detachably fixed to one end of the clearance groove 311, and a tensioning mechanism 5 is provided at the other end of the clearance groove 311. The other end of the dustproof belt 41 is detachably connected to the tensioning mechanism 5. In this embodiment, the detachable fixing method between the dustproof belt 41 and the end of the clearance groove 311 can be a fastener connection or a snap-fit ​​connection. The roller assembly 42 includes multiple roller bodies 421, which are rotatably connected to the side of the corresponding movable seat 21 near the box cover 32, and the multiple roller bodies 421 surround the outside of the rod segment of the corresponding measuring rod 1 located inside the protective box seat 31. Thus, the roller assembly 42 is used to tension and guide the dustproof belt 41 when the measuring rod 1 moves, ensuring that the dustproof belt 41 forms a dynamic shielding interface during the movement of the measuring rod 1, continuously and effectively blocking the largest contaminant intrusion channel, the clearance groove 311, ensuring the integrity of the overall protective effect of the protective cover mechanism 3, facilitating the isolation of the drive mechanism 2 from dust, moisture and possible accidental collisions in the external environment, improving the problems of decreased transmission accuracy, abnormal wear and corrosion of parts caused by contaminant intrusion, and enhancing the long-term operational reliability and service life of the measuring device.

[0037] Reference Figure 2 and Figure 3 The tensioning mechanism 5 includes a tensioning roller 51 and a central shaft assembly 52 coaxially fixed to the tensioning roller 51. The central shaft assembly 52 is rotatably connected to the protective housing 31, and its axial direction is the same as the width direction of the dustproof belt 41. The tensioning roller 51 is a hollow roller with a strip groove 511 on its surface. One end of the dustproof belt 41 passes through the strip groove 511 and is fixed to the central shaft assembly 52. ​​Since the tension belt may loosen after long-term use, the tensioning assembly can tension the dustproof belt 41, allowing the operator to adjust the tension of the dustproof belt 41 by rotating the central shaft assembly 52. ​​This avoids the loosening or over-tightening that may occur with traditional fixing methods, ensuring the long-term effectiveness of the dynamic seal.

[0038] Reference Figure 1 , Figure 3 and Figure 4The cover 32 has a positioning hole 321 on the side near the protective cover 31, and the end of the central shaft assembly 52 near the cover 32 is rotatably disposed in the positioning hole 321. Thus, the positioning hole 321 provides an additional rotational support point for one end of the central shaft assembly 52, making the rotation of the central shaft assembly 52 smoother and reducing eccentricity or wobbling. This helps maintain the parallelism of the tension roller 51, ensures uniform force on the dustproof belt 41, extends the service life of the dustproof belt 41, and improves the rigidity and operational stability of the overall structure.

[0039] Reference Figures 2-5 The central shaft assembly 52 includes a fixed semi-circular shaft 521 and a movable semi-circular shaft 522 that can be assembled, and a clamping member 523 for clamping the fixed semi-circular shaft 521 and the movable semi-circular shaft 522. The fixed semi-circular shaft 521 is coaxially fixed with the tension roller 51, and the movable semi-circular shaft 522 is slidably connected to the tension roller 51 in a direction perpendicular to the assembly surface of the central shaft assembly 52. ​​Both ends of the tension roller 51 are provided with clearance grooves 512 for the movable semi-circular shaft 522 to slide. Each of the fixed semi-circular shaft 521 and the movable semi-circular shaft 522 has a pressing groove 524 on its opposite side. The pressing groove 524 communicates with the strip groove 511, and one end of the dustproof belt 41 is pressed between the two pressing grooves 524. Thus, by disassembling the central shaft assembly 52 into a modular fixed semi-circular shaft 521 and a movable semi-circular shaft 522, and securing them with a clamping member 523, the installation and replacement process of the dustproof belt 41 is simplified. During installation, simply place the end of the dustproof belt 41 between the clamping grooves 524 of the two semi-circular shafts, then slide the movable semi-circular shaft 522 to align it with the fixed semi-circular shaft 521, and finally tighten it with the clamping member 523. This process is simple and can be completed without special tools. The clamping grooves 524 on the two semi-circular shafts work together to generate a uniform and strong clamping force on the dustproof belt 41, preventing it from slipping off under tension. This modular design solves the problem of the dustproof belt 41 being difficult to insert into a fixed position, improving the maintainability of the equipment.

[0040] Reference Figure 5 To further enhance the clamping and fixing effect on the end of the dustproof belt 41 and prevent the tension belt from slipping out of the clamping groove 524, an anti-slip surface 5241 is provided on the opposite side wall of the two clamping grooves 524. The anti-slip surface 5241 is one or a combination of two or more of the following: a frosted surface, a toothed surface, a raised dot matrix surface, or a grooved dot matrix surface.

[0041] Reference Figure 3 and Figures 6-9The clamping component 523 includes a clamping nut 5231 and a clamping ring 5232. The central shaft assembly 52 extends outward from the tension roller 51 and has an outwardly protruding external threaded section 525 near the cover 32. The clamping nut 5231 is threaded onto the external threaded section 525. A through hole 312 is provided on the protective housing 31. The section of the central shaft assembly 52 away from the cover 32 passes through the through hole 312 and connects to the clamping ring 5232. The end of the clamping ring 5232 near the through hole 312 abuts against the outer side of the protective housing 31. After the central shaft assembly 52 passes through the through hole 312 of the protective housing 31, the clamping nut 5231 engages with the external thread section 525 of the central shaft assembly 52, and the clamping ring 5232 abuts against the outside of the protective housing 31, realizing the rapid fastening and disassembly of the central shaft assembly 52. ​​It also forms a stable rotational support structure, preventing the central shaft assembly 52 from shaking or shifting during operation, and ensuring the durability and consistency of the tension.

[0042] Reference Figures 6-8 and Figure 10 The clamping ring 5232 has multiple balls 5233 arranged in a circumferential array on the side near the through hole 312, and the balls 5233 abut against the outer side of the protective housing 31. In this way, the sliding friction between the clamping ring 5232 and the housing can be transformed into rolling friction. When the operator rotates the central shaft assembly 52 to adjust the tension, the rolling of the balls 5233 greatly reduces the rotational resistance and wear on the contact surface, making the tensioning operation more effortless and smooth, and ensuring the stability of the clamping ring 5232 in axially limiting the central shaft assembly 52.

[0043] Reference Figure 1 , Figure 6 , Figure 10 and Figure 11Both the fixed semi-circular shaft 521 and the movable semi-circular shaft 522 have axial grooves 526 on their outer sides away from the cover 32. The inner ring of the clamping ring 5232 has an integrally formed inner retaining tooth 5234 that matches the axial groove 526. The outer section of the fixed semi-circular shaft 521 and the movable semi-circular shaft 522 away from the cover 32 has an arc-shaped retaining groove 527 extending circumferentially along the central shaft assembly 52, and the arc-shaped retaining groove 527 communicates with the corresponding axial groove 526. The thickness of the inner retaining tooth 5234 is slightly greater than the width of the arc-shaped retaining groove 527 to ensure a tight fit between the inner retaining tooth 5234 and the arc-shaped groove. After passing through the axial groove 526, the inner retaining tooth 5234 is engaged in the arc-shaped retaining groove 527. Through the design of the axial groove 526 and the arc-shaped retaining groove 527, and in conjunction with the inner retaining tooth 5234 of the clamping ring 5232, the central shaft assembly 52 can be quickly engaged and fixed. After the inner locking teeth 5234 are inserted along the axial groove 526, they rotate and lock into the arc-shaped groove 527, forming a mechanical interlock that ensures a firm connection and prevents accidental loosening. This snap-fit ​​structure simplifies the assembly process, improves the assembly efficiency of the central shaft assembly 52, and enhances the overall stability and safety of the tensioning mechanism 5.

[0044] Reference Figure 10 and Figure 11 The end of the arc-shaped groove 527 closest to the corresponding axial groove 526 is its own inlet end. The inner locking tooth 5234 has a guide chamfer 5235 on the side away from the inlet end of the corresponding arc-shaped groove 527, which realizes a more fault-tolerant guiding function. By setting the guide chamfer 5235, the inner locking tooth 5234 is more smoothly inserted into the arc-shaped groove 527, reducing resistance and impact during assembly and avoiding jamming or damage to parts.

[0045] Reference Figure 1 , Figure 6 , Figure 9 and Figure 11 The section of the central shaft assembly 52 away from the cover 32 is also provided with an angle locking mechanism 6 for locking the tensioning mechanism 5 at an angle after tensioning. The angle locking mechanism 6 includes a ratchet 61, a pawl 62, and an elastic element 63 that provides elastic force to the ratchet 61. The ratchet 61 is sleeved on the section of the central shaft assembly 52 away from the cover 32, and the inner ring of the ratchet 61 has an integrally formed limiting part 611 that matches the axial groove 526. An annular groove 528 is also provided on the circumferential side wall of the section of the central shaft assembly 52 away from the cover 32. A retaining spring 5281 is engaged in the annular groove 528, and the ratchet 61 is located between the clamping ring 5232 and the retaining spring 5281. The pawl 62 is rotatably connected to the protective box base 31, and the pawl part of the pawl 62 is engaged in the ratchet teeth of the ratchet 61.

[0046] Reference Figures 6-9A mounting plate 313 is detachably fixed to the protective box base 31 by bolts. A pawl 62 is rotatably mounted on the mounting plate 313. A fixing plate 3131 is fixed on the mounting plate 313. The elastic element 63 is a compression spring. One end of the compression spring is fixedly connected to the fixing plate 3131, and the other end of the compression spring is fixedly connected to the back of the pawl 62. The elastic force of the compression spring makes the pawl of the pawl 62 tend to press against the ratchet teeth of the ratchet wheel 61. A rotating handle 612 is fixedly connected to the side of the ratchet 61 away from the through hole 312. When the rotating handle 612 is rotated in the tensioning direction, the ratchet teeth of the ratchet 61 can overcome the elastic force of the compression spring and pass over the pawl 62. After the tension adjustment is completed and the handle is released, the pawl 62 instantly engages with the ratchet teeth of the ratchet 61 under the action of the elastic force, realizing the mechanical self-locking function of unidirectional rotation and reverse locking. This allows the tensioning mechanism 5 to be fixed at the angle after tensioning, preventing the central shaft assembly 52 from rotating accidentally under vibration or external force, which would lead to loss of tension. This ensures that the dustproof belt 41 maintains a proper tension for a long time, improving the durability of dust protection and the reliability of the device, avoiding the need for frequent adjustments due to tension slack, and reducing maintenance requirements.

[0047] The implementation principle of the long-lasting dustproof measuring device for a roll grinding machine according to this application embodiment is as follows: By setting a protective cover mechanism 3 and sealing the measuring rod 1 and drive mechanism 2 inside it, a sealed space isolated from the external environment is constructed, protecting the core transmission components from dust, oil, moisture, and accidental impacts. A dustproof strip 41 set at the clearance groove 311, combined with a fixed connection at one end and a tensioning mechanism 5 at the other end, forms an adjustable dynamic sealing interface. This basic structure ensures that the dustproof strip 41 always fits snugly against the clearance groove 311, effectively blocking the main channels for contaminant intrusion, significantly reducing the risk of abnormal wear and corrosion of the transmission components, and greatly improving the long-term operational reliability, measurement accuracy stability, and overall service life of the measuring device in harsh industrial environments.

[0048] By disassembling the central shaft assembly 52 into a modular fixed semi-circular shaft 521 and a movable semi-circular shaft 522, and securing them with a clamping member 523, the installation and replacement process of the dustproof belt 41 is simplified. During installation, simply place the end of the dustproof belt 41 between the clamping grooves 524 of the two semi-circular shafts, then slide the movable semi-circular shaft 522 to align it with the fixed semi-circular shaft 521, and finally tighten it with the clamping member 523. This process is simple and can be completed without special tools. The clamping grooves 524 on the two semi-circular shafts work together to generate a uniform and strong clamping force on the dustproof belt 41, preventing it from slipping off under tension. This modular design solves the problem of the dustproof belt 41 being difficult to insert into a fixed position, improving the maintainability of the equipment.

[0049] The angle locking mechanism 6 provides a positive rotational limit for the tensioned central shaft assembly 52, preventing it from rotating in the opposite direction under external force or the rebound force of the dustproof belt 41. This means that once the tension of the dustproof belt 41 is adjusted and locked by the angle locking mechanism 6, the set tension will be reliably maintained without relying on continuous friction. This fundamentally solves the problem of tension decay during the service life of the dustproof belt 41, ensuring the long-term stability of the dustproof sealing effect.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A long-lasting dustproof roll grinder measuring device comprising two measuring rods (1) and a driving mechanism (2) connected to the two measuring rods (1), characterized in that: It also includes a protective cover mechanism (3), which includes a protective box base (31) and a box cover (32) that is detachably fixed to the protective box base (31). The measuring rod (1) driving mechanism (2) is located inside the protective cover mechanism (3). A clearance groove (311) is provided on one side of the protective box base (31) near the end of the box cover (32) for two measuring rods (1) to pass through and move. A dustproof mechanism (4) is provided at the clearance groove (311). The dustproof mechanism (4) includes a dustproof belt (41). One end of the dustproof belt (41) is detachably fixed to one end of the clearance groove (311). A tensioning mechanism (5) is provided at the other end of the clearance groove (311). The other end of the dustproof belt (41) is detachably connected to the tensioning mechanism (5). The tensioning mechanism (5) includes a tensioning roller (51) and a central shaft assembly (52) coaxially fixed with the tensioning roller (51). The central shaft assembly (52) is rotatably connected to the protective housing base (31). The axial direction of the central shaft assembly (52) is the same as the width direction of the dustproof belt (41). The tensioning roller (51) is a hollow roller. The roller surface of the tensioning roller (51) is provided with a strip groove (511). One end of the dustproof belt (41) passes through the strip groove (511) and is fixed to the central shaft assembly (52). The central shaft assembly (52) includes a fixed semi-circular shaft (521) and a movable semi-circular shaft (522) that can be assembled, and a clamping member (523) for clamping the fixed semi-circular shaft (521) and the movable semi-circular shaft (522). The fixed semi-circular shaft (521) is coaxially fixed with the tension roller (51). The movable semi-circular shaft (522) is slidably connected to the tension roller (51) in a direction perpendicular to the assembly surface of the central shaft assembly (52). Both ends of the tension roller (51) are provided with clearance grooves (512) for the movable semi-circular shaft (522) to slide. The fixed semi-circular shaft (521) and the movable semi-circular shaft (522) are each provided with a pressing groove (524) on opposite sides. The pressing groove (524) is connected to the strip groove (511). One end of the dustproof belt (41) is pressed between the two pressing grooves (524).

2. The long-lasting dustproof roll grinder measuring device according to claim 1, characterized in that: The clamping component (523) includes a clamping nut (5231) and a clamping ring (5232). The central shaft assembly (52) extends out of the tension roller (51) and has an outwardly protruding external thread section (525) near the box cover (32). The clamping nut (5231) is threaded onto the external thread section (525). The protective box base (31) has a through hole (312). The central shaft assembly (52) extends out of the through hole (312) and connects to the clamping ring (5232). The end of the clamping ring (5232) near the through hole (312) abuts against the outer side of the protective box base (31).

3. A long-lasting dustproof roll grinder measuring device according to claim 2, characterized in that: The clamping ring (5232) has a ball bearing (5233) on the side near the through hole (312), and the ball bearing (5233) abuts against the outside of the protective box base (31).

4. The long-lasting dustproof roll grinder measuring device according to claim 2, characterized in that: Both the fixed semi-circular shaft (521) and the movable semi-circular shaft (522) have axial grooves (526) on their outer sides away from the cover (32). The inner ring of the clamping ring (5232) has inner locking teeth (5234) that are adapted to the axial grooves (526). The outer side of the fixed semi-circular shaft (521) and the movable semi-circular shaft (522) away from the cover (32) has an arc-shaped groove (527) that extends circumferentially along the central shaft assembly (52). The arc-shaped groove (527) is connected to the corresponding axial groove (526). The inner locking teeth (5234) are engaged in the arc-shaped groove (527) after passing through the axial groove (526).

5. A long-life dust protected roll grinder measuring device according to claim 4, characterized in that: The end of the arc-shaped groove (527) closest to the corresponding axial groove (526) is its own inlet end, and the inner tooth (5234) is provided with a guide chamfer (5235) on the side away from the inlet end of the corresponding arc-shaped groove (527).

6. The long-lasting dustproof roll grinder measuring device according to claim 2, characterized in that: The central shaft assembly (52) is further provided with an angle locking mechanism (6) for locking the tensioning mechanism (5) at an angle after tensioning.

7. The long-lasting dustproof measuring device for a roll grinding machine according to claim 6, characterized in that: The angle locking mechanism (6) includes a ratchet (61), a pawl (62), and an elastic element (63) that provides elastic force to the ratchet (61). The ratchet (61) is sleeved on a section of the central shaft assembly (52) away from the cover (32). The inner ring of the ratchet (61) is provided with a limiting part (611) that matches the axial groove (526). The circumferential side wall of the central shaft assembly (52) away from the cover (32) is also provided with an annular groove (528). A retaining ring (5281) is provided in the annular groove (528). The ratchet (61) is located between the clamping ring (5232) and the retaining ring (5281). The pawl (62) is rotatably connected to the protective box seat (31). The pawl part of the pawl (62) is engaged in the ratchet teeth of the ratchet (61).

8. The long-lasting dustproof measuring device for a roll grinding machine according to claim 1, characterized in that: The box cover (32) has a positioning hole (321) on the side near the protective box base (31), and the central shaft assembly (52) is rotatably disposed in the positioning hole (321) at one end near the box cover (32).

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