Digital meter counter resistant to large amplitude interference

Abstract

The invention relates to the technical field of length metering equipment, in particular to a digital meter counter resistant to large amplitude interference. According to the technical scheme, the device comprises a workbench, two control unit boxes are arranged at the top of the workbench, a sliding table is movably arranged at the top of the workbench, rolling wheels are movably arranged at the top of the sliding table, a supporting structure is arranged above the rolling wheels, the supporting structure comprises a bearing plate, a Hall position sensor is arranged at the top of the bearing plate, and the Hall position sensor is arranged at the top of the bearing plate. Through the arrangement of a first clamping plate, a second clamping plate, a lock head, a clamping block, a clamping groove, a threaded rod and a transverse plate, rapid replacement of a Hall position sensor can be achieved, the pre-tightening force can be adjusted according to the actual situation, and the situation that damping cannot be achieved due to the fact that the pre-tightening force is too large is prevented; and the phenomenon that the Hall position sensor bounces up and down in vibration due to too small pre-tightening force is avoided, and the metering precision of equipment is ensured.

Description

Technical Field

[0001] This invention relates to the field of length measuring equipment technology, and in particular to a digital meter counter that is resistant to large amplitude interference. Background Technology

[0002] A digital meter counter resistant to large amplitude interference is a measuring device that can accurately measure the length or displacement of an object in environments with large amplitude interference such as strong electromagnetic fields, mechanical vibrations, and voltage fluctuations. Its core advantage is that it suppresses the impact of interference signals on counting accuracy through hardware anti-interference and software filtering algorithms. It is widely used in industrial scenarios such as cable production, plate cutting, and pipe manufacturing. Large amplitude interference is often mechanical vibration, which can cause the Hall position sensor to shift, resulting in measurement errors. In order to reduce the amplitude, a shock-absorbing pad is usually placed between the Hall sensor and the mounting body.

[0003] Since Hall sensors are generally fixed to equipment by bolts, they are prone to excessive preload, which can lead to excessive compression of the rubber damping pads, or even complete loss of elasticity and vibration damping effect. In view of the above reasons, this application proposes a digital meter counter that is resistant to large amplitude interference. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a digital meter counter that is resistant to large amplitude interference.

[0005] The technical solution of the present invention: A digital meter counter resistant to large amplitude interference includes a worktable, two control unit boxes on the top of the worktable, a slide table movably mounted on the top of the worktable, rollers movably mounted on the top of the slide table, a support structure above the rollers, a load-bearing plate, a Hall position sensor on the top of the load-bearing plate, mounting brackets fixed on both sides of the load-bearing plate, a mounting box outside the mounting brackets, a fixing strip fixed at the bottom of the mounting box, and a pressing and fixing structure on the top of the load-bearing plate for positioning the Hall position sensor; The pressing and fixing structure includes two locking seats, each with a support plate engaged within it. A horizontal plate is movably mounted within each of the two support plates, and a pressure plate is fixed between the two horizontal plates. The pressure plate is used to press and fix the Hall position sensor. A rubber pad is provided at the bottom of the pressure plate. Threaded rods are movably mounted at the top of each of the two support plates, and pulleys are fixed on each of the two threaded rods. A rotating disk is fixed at the top of one of the threaded rods.

[0006] Optionally, each of the two support plates has a mounting groove on one side that is close to each other, the inner wall of the mounting groove has a sliding groove, and both sides of the cross plate have sliders, the sliders and the sliding grooves being movably connected.

[0007] Optionally, a through groove is provided on one side of the inner wall of the mounting groove, a connecting rod is fixedly provided on one end of the horizontal plate, a pointer is provided on one side of the connecting rod, and a scale line is provided on one side of the support plate. The combination of the pointer and the scale line can facilitate the operator to observe the pressing depth.

[0008] Optionally, the top inner wall of the mounting groove is provided with an internal threaded hole, the threaded rod is adapted to the internal threaded hole, the top of the horizontal plate is fixedly provided with a guide block, the top of the guide block is provided with a mounting hole, a bearing is fixedly provided in the mounting hole, and the inner ring of the bearing is fixedly sleeved on the threaded rod.

[0009] Optionally, a fixing plate is fixedly provided on one inner wall of the locking seat, a clamping plate one is movably provided on one side of the fixing plate, a clamping plate two is movably provided inside the clamping plate one, and a lock head is fixedly provided on one side of the two support plates, with the side of the lock head near the clamping plate one and the clamping plate two being arc-shaped.

[0010] Optionally, both clamping plate one and clamping plate two are fixedly provided with upright plates. A connecting block is movably provided on one side of the upright plate. A pull rope is fixedly provided on one side of the connecting block. A pull rod is fixedly provided at the end of the pull rope away from the connecting block. One end of the pull rod passes through the locking seat. A spring is sleeved on the pull rod. One end of the spring is in contact with the upright plate, and the other end of the spring is in contact with the fixed plate.

[0011] Optionally, the locking seat has slots on both the front and back inner walls, the slots being "L"-shaped, and the support plate has blocks fixedly installed on both the front and back, the blocks being compatible with the slots.

[0012] Optionally, the inner wall of one side of the mounting box is provided with a positioning hole, and the mounting bracket is provided with a storage hole on one side. A second spring is fixedly installed in the storage hole, and a guide plate is fixedly installed at one end of the second spring. The guide plate and the storage hole are movably connected. A positioning rod is fixedly installed on one side of the guide plate. The positioning rod is adapted to the positioning hole. The cooperation between the positioning hole and the positioning rod can realize the quick assembly and disassembly of the load-bearing plate. A pressing component is provided on one side of the positioning hole. The pressing component can press the positioning rod into the storage hole, reducing the difficulty of disassembling the load-bearing plate.

[0013] Optionally, the pressing assembly includes a limiting frame, which is fixedly connected to the mounting box. Multiple limiting rods are movably provided on the limiting frame. A pressure plate is fixedly provided at one end of each of the multiple limiting rods. A top rod is fixedly provided on one side of the pressure plate. A spring is sleeved on each of the multiple limiting rods.

[0014] Optionally, a rotating shaft is fixedly provided at the center of the roller, and a permanent magnet is provided on the top outer wall of the rotating shaft. A shock-absorbing pad is provided between the Hall position sensor and the load-bearing plate, and honeycomb holes are distributed in the shock-absorbing pad. A limiting plate is fixedly provided on the outside of the Hall position sensor, and a vertical rod is movably provided on the limiting plate. The vertical rod is fixedly connected to the load-bearing plate. The limiting plate and the vertical rod can prevent the Hall position sensor from lateral displacement.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects: 1. Through the configuration of clamp plate one, clamp plate two, lock head, card block, card slot, threaded rod and cross plate, the Hall position sensor can be quickly replaced, and the preload can be adjusted according to the actual situation to prevent excessive preload from causing failure to dampen vibration, and insufficient preload from causing the Hall position sensor to bounce up and down during vibration, thus ensuring the measurement accuracy of the equipment.

[0016] 2. The design of the storage hole, positioning rod, positioning hole, and guide plate enables quick disassembly of the load-bearing plate, facilitating subsequent maintenance of the permanent magnet.

[0017] 3. By setting up the pressing component, the operator can press the positioning rod into the storage hole during the process of disassembling the load-bearing plate, reducing the difficulty of disassembling the load-bearing plate.

[0018] 4. By setting up the limiting plate and the vertical plate, the relative position of the sensor and the permanent magnet can be prevented from shifting, which could cause pulse omission or miscounting, thus optimizing the measurement accuracy of the equipment. Attached Figure Description

[0019] Figure 1 A three-dimensional structural schematic diagram of the present invention is provided; Figure 2 A three-dimensional schematic diagram of the rotating shaft and permanent magnet in this invention is provided; Figure 3 A three-dimensional structural diagram of the support structure in this invention is provided; Figure 4 An exploded structural diagram of the support structure in this invention is provided; Figure 5 A three-dimensional structural schematic diagram of the pressing component in this invention is provided; Figure 6 A top-section schematic diagram of the shock-absorbing pad in the dustproof and waterproof structure of the present invention is provided; Figure 7 A three-dimensional schematic diagram of the pressing and fixing structure in this invention is provided; Figure 8 A front sectional view of the pressing and fixing structure in this invention is provided; Figure 9 A schematic diagram of the separation structure of the locking seat and the support plate in this invention is provided; Figure 10 A three-dimensional structural diagram of clamping plate one and clamping plate two in this invention is provided.

[0020] Figure label: 1. Workbench; 2. Control unit box; 3. Slide; 4. Rollers; 5. Shaft; 6. Permanent magnet; 7. Support structure; 701. Load-bearing plate; 702. Mounting box; 703. Mounting bracket; 704. Fixing strip; 705. Storage hole; 706. Spring 2; 707. Guide plate; 708. Positioning rod; 709. Positioning hole; 71. Pressing assembly; 711. Limiting bracket; 712. Limiting rod; 713. Pressure plate; 714. Spring 3; 715. Top rod; 8. Shock-absorbing pads; 9. Hall effect position sensor; 10. Limit plate; 11. Vertical pole; 12. Press-fixed structure; 121. Locking seat; 122. Support plate; 123. Fixing plate; 124. Clamping plate one; 125. Clamping plate two; 126. Vertical plate; 127. Spring one; 128. Pull rod; 129. Lock head; 1210. Mounting groove; 1211. Through groove; 1212. Horizontal plate; 1213. Connecting rod; 1214. Scale line; 1215. Threaded rod; 1216. Pressure plate; 1217. Rubber pad; 1218. Pulley; 1219. Rotating disc; 1220. Slot; 1221. Locking block. Detailed Implementation

[0021] The technical solutions of this disclosure will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments.

[0022] The components of the embodiments of this disclosure, which are typically described and shown in the accompanying drawings, can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of embodiments of this disclosure provided in the drawings is not intended to limit the scope of the claimed disclosure, but merely to illustrate selected embodiments of the disclosure.

[0023] Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this disclosure.

[0024] In the description of this disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0025] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0026] Example like Figure 1-10 As shown, the present invention proposes a digital meter counter resistant to large amplitude interference, comprising a worktable 1, two control unit boxes 2 on the top of the worktable 1, a slide 3 movably mounted on the top of the worktable 1, rollers 4 movably mounted on the top of the slide 3, a support structure 7 above the rollers 4, the support structure 7 including a load-bearing plate 701, a Hall position sensor 9 mounted on the top of the load-bearing plate 701, a limiting plate 10 fixedly mounted outside the Hall position sensor 9, a vertical rod 11 movably mounted on the limiting plate 10, the vertical rod 11 being fixedly connected to the load-bearing plate 701, and the limiting plate 10 and the vertical rod 11 being... To prevent the Hall position sensor 9 from shifting laterally, a rotating shaft 5 is fixedly installed at the center of the roller 4. A permanent magnet 6 is installed on the top outer wall of the rotating shaft 5. A shock-absorbing pad 8 is installed between the Hall position sensor 9 and the load-bearing plate 701. The shock-absorbing pad 8 has honeycomb holes distributed inside. Mounting brackets 703 are fixedly installed on both sides of the load-bearing plate 701. A mounting box 702 is installed on the outside of the mounting bracket 703. A fixing strip 704 is fixedly installed at the bottom of the mounting box 702. A pressing and fixing structure 12 is installed on the top of the load-bearing plate 701. The pressing and fixing structure 12 is used to position the Hall position sensor 9. Specifically, the pressing and fixing structure 12 includes two locking seats 121, with a support plate 122 snapped into each locking seat 121. A horizontal plate 1212 is movably mounted within each support plate 122. Each support plate 122 has a mounting groove 1210 on its adjacent side, with a sliding groove on the inner wall of the mounting groove 1210. Slider blocks are provided on both sides of the horizontal plate 1212, movably connected to the sliding groove. A through groove 1211 is provided on one inner wall of the mounting groove 1210, and one end of the horizontal plate 1212 is fixed. A connecting rod 1213 is fixedly provided, with a pointer on one side of the connecting rod 1213 and a scale line 1214 on one side of the support plate 122. The combination of the pointer and the scale line 1214 allows the operator to easily observe the pressing depth. A pressure plate 1216 is fixedly provided between the two horizontal plates 1212. The pressure plate 1216 is used to press and fix the Hall position sensor 9. A rubber pad 1217 is provided at the bottom of the pressure plate 1216. Threaded rods are movably provided on the top of both support plates 122. 1215, The top inner wall of the mounting groove 1210 is provided with an internal threaded hole, and the threaded rod 1215 is adapted to the internal threaded hole. A guide block is fixedly provided on the top of the horizontal plate 1212, and the top of the guide block is provided with a mounting hole. A bearing is fixedly provided in the mounting hole, and the inner ring of the bearing is fixedly sleeved on the threaded rod 1215. The top inner wall of the mounting groove 1210 is provided with an internal threaded hole, and the threaded rod 1215 is adapted to the internal threaded hole. A guide block is fixedly provided on the top of the horizontal plate 1212, and the top of the guide block is provided with a mounting hole. A bearing is fixedly installed in the mounting hole. The inner ring of the bearing is fixedly sleeved on the threaded rod 1215. Pulleys 1218 are fixedly installed on both threaded rods 1215. A rotating disk 1219 is fixedly installed at the top of one of the threaded rods 1215. The inner wall of the front and back of the locking seat 121 are provided with slots 1220. The slots 1220 are "L" shaped. Blocks 1221 are fixedly installed on the front and back of the support plate 122. The blocks 1221 and the slots 1220 are compatible. Specifically, a fixing plate 123 is fixedly installed on one inner wall of the locking seat 121. A clamping plate 124 is movably installed on one side of the fixing plate 123. A clamping plate 125 is movably installed inside the clamping plate 124. A lock head 129 is fixedly installed on one side of the two support plates 122. The side of the lock head 129 closest to the clamping plate 124 and the clamping plate 125 is arc-shaped. A vertical plate 126 is fixedly installed on both the clamping plate 124 and the clamping plate 125. A connecting block is movably installed on one side of the vertical plate 126. A pull rope is fixedly installed on one side of the connecting block. A pull rod 128 is fixedly installed at the end of the pull rope away from the connecting block. One end of the pull rod 128 passes through the locking seat 121. A spring is sleeved on the pull rod 128. Spring 127 has one end attached to the upright plate 126 and the other end attached to the fixing plate 123. When the sensor needs to be removed for replacement, first pull the two sets of pull rods 128 in opposite directions. The pull rods 128 drive the clamping plates 124 and 125, making their openings larger. Then, push the two support plates 122 to one side simultaneously. The support plates 122 drive the locking block 1221 to move within the slot 1220, and cause the lock head 129 to separate from the clamping plates 124 and 125. Then, pull the two support plates 122 upwards to separate the pressure plate 1216 from the sensor. To remove the sensor, pull it upwards. During installation, place the limiting plate 10 onto the vertical rod 11, then insert the support plate 122 into the locking seat 121, allowing the locking block 1221 to move within the slot 1220. When the support plate 122 can no longer move, move it to one side, causing the locking block 1221 to engage in the horizontal groove of the slot 1220. The movement of the support plate 122 will activate the locking head 129 on one side. The locking head 129 will open the openings of the clamping plates 124 and 125, causing them to rotate and compress the spring 127 on one side. When the locking head 129 enters between the two clamping plates, the spring... Spring 127 resets clamping plates 124 and 125, locking lock head 129 to achieve squeezing and positioning of sensor. After installation, the height of pressure plate 1216 can be adjusted according to actual conditions. Rotating rotating disk 1219 can drive one threaded rod 1215. Threaded rod 1215 drives another threaded rod 1215 through pulley 1218. The simultaneous rotation of the two threaded rods 1215 can drive horizontal plate 1212, which in turn drives pressure plate 1216, thus adjusting the preload. This effectively prevents excessive preload from causing failure to dampen vibration, and insufficient preload from causing Hall position sensor 9 to bounce up and down during vibration. Furthermore, a positioning hole 709 is provided on one inner wall of the mounting box 702, and a storage hole 705 is provided on one side of the mounting bracket 703. A second spring 706 is fixedly installed in the storage hole 705, and a guide plate 707 is fixedly installed at one end of the second spring 706. The guide plate 707 and the storage hole 705 are movably connected. A positioning rod 708 is fixedly installed on one side of the guide plate 707. The positioning rod 708 is adapted to the positioning hole 709. The cooperation between the positioning hole 709 and the positioning rod 708 can realize the quick assembly and disassembly of the load-bearing plate 701. A pressing component 71 is provided on one side of the positioning hole 709. The pressing component 71 can press the positioning rod 708 into the storage hole 705, reducing the difficulty of disassembling the load-bearing plate 701. Furthermore, the pressing assembly 71 includes a limiting frame 711, which is fixedly connected to the mounting box 702. Multiple limiting rods 712 are movably mounted on the limiting frame 711. A pressure plate 713 is fixedly mounted on one end of each limiting rod 712. A top rod 715 is fixedly mounted on one side of the pressure plate 713. Springs 714 are fitted onto each of the multiple limiting rods 712. When the permanent magnet 6 needs to be replaced, the pressure plate 713 is pressed inward, and the pressure plate 713 drives the top rod 715 to squeeze the positioning rod 708. After the positioning rod 708 retracts into the storage hole 705, the two mounting brackets 703 are pulled upward, and the load-bearing plate 701 can be removed as a whole. At this time, the permanent magnet 6 on the top outer wall of the rotating shaft 5 is exposed and can be replaced.

[0027] In this embodiment, the limiting plate 10 and the vertical rod 11 prevent the relative position of the sensor and the permanent magnet 6 from shifting, which could cause pulse omissions or miscalculations. When installing the Hall position sensor 9, the limiting plate 10 is placed on the vertical rod 11, and then the support plate 122 is inserted into the locking seat 121, causing the locking block 1221 to move within the slot 1220. When the support plate 122 can no longer move, it is moved to one side, causing the locking block 1221 to lock into the horizontal groove of the slot 1220. When the support plate 122 moves, it will drive the locking head 129 on one side, and the locking head 129 will lock the clamping plate 124 and... The open end of clamping plate 2 125 is opened, clamping plate 1 124 and clamping plate 2 125 rotate and compress spring 1 127 on one side. When the locking head 129 enters between the two clamping plates, spring 1 127 causes clamping plate 1 124 and clamping plate 2 125 to return to their original positions, locking the locking head 129 and achieving the compression positioning of the sensor. After installation, the height of pressure plate 1216 can be adjusted according to the actual situation. Rotating the rotating disk 1219 can drive one of the threaded rods 1215. Threaded rod 1215 drives the other threaded rod 1215 through pulley 1218. Both threaded rods 1215 rotate simultaneously. The movement can drive the horizontal plate 1212, which in turn drives the pressure plate 1216, thereby adjusting the preload. This effectively prevents excessive preload from causing insufficient vibration damping, and insufficient preload from causing the Hall position sensor 9 to bounce up and down during vibration. When disassembling the sensor, first pull the two sets of pull rods 128 in opposite directions. The pull rods 128 drive the clamping plates 124 and 125, making the openings of the clamping plates 124 and 125 larger. Then, push the two support plates 122 to one side simultaneously. The support plates 122 drive the locking block 1221 to move within the locking slot 1220. This causes the lock head 129 to separate from the clamping plate 124 and clamping plate 125. Then, the two support plates 122 are pulled upwards to separate the pressure plate 1216 from the sensor. The sensor is then lifted upwards to remove it. If the permanent magnet 6 is damaged and needs to be replaced, the pressure plate 713 is pressed inwards. The pressure plate 713 drives the top rod 715 to squeeze the positioning rod 708. When the positioning rod 708 is retracted into the storage hole 705, the two mounting brackets 703 are lifted upwards to remove the load-bearing plate 701 as a whole. At this time, the permanent magnet 6 on the top outer wall of the rotating shaft 5 is exposed and can be replaced.

[0028] The above specific embodiments are merely optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A digital meter counter resistant to large amplitude interference, comprising a worktable (1), characterized in that: The top of the workbench (1) is provided with two control unit boxes (2), the top of the workbench (1) is provided with a slide (3), the top of the slide (3) is provided with a roller (4), and a support structure (7) is provided above the roller (4). The support structure (7) includes a load-bearing plate (701), a Hall position sensor (9) is provided on the top of the load-bearing plate (701), mounting brackets (703) are fixed on both sides of the load-bearing plate (701), a mounting box (702) is provided on the outside of the mounting bracket (703), a fixing strip (704) is fixed on the bottom of the mounting box (702), and a pressing fixing structure (12) is provided on the top of the load-bearing plate (701), which is used to position the Hall position sensor (9). The pressing and fixing structure (12) includes two locking seats (121), a support plate (122) is snapped into the locking seat (121), a horizontal plate (1212) is movably provided in both support plates (122), and a pressure plate (1216) is fixed between the two horizontal plates (1212). The pressure plate (1216) is used to press and fix the Hall position sensor (9). A rubber pad (1217) is provided at the bottom of the pressure plate (1216). A threaded rod (1215) is movably provided at the top of both support plates (122), and a pulley (1218) is fixed on both threaded rods (1215). A rotating disk (1219) is fixed at the top of one of the threaded rods (1215).

2. The digital meter counter resistant to large amplitude interference according to claim 1, characterized in that, The two support plates (122) are provided with mounting grooves (1210) on their adjacent sides. The inner wall of the mounting groove (1210) is provided with a sliding groove. The two sides of the horizontal plate (1212) are provided with sliders, and the sliders and the sliding grooves are movably connected.

3. A digital meter counter resistant to large amplitude interference according to claim 2, characterized in that, The inner wall of one side of the mounting groove (1210) is provided with a through groove (1211), and a connecting rod (1213) is fixedly provided at one end of the horizontal plate (1212). A pointer is provided on one side of the connecting rod (1213), and a scale line (1214) is provided on one side of the support plate (122). The use of the pointer and the scale line (1214) together can facilitate the operator to observe the pressing depth.

4. A digital meter counter resistant to large amplitude interference according to claim 2, characterized in that, The top inner wall of the mounting groove (1210) is provided with an internal threaded hole. The threaded rod (1215) is adapted to the internal threaded hole. The top of the horizontal plate (1212) is fixedly provided with a guide block. The top of the guide block is provided with a mounting hole. A bearing is fixedly provided in the mounting hole. The inner ring of the bearing is fixedly sleeved on the threaded rod (1215).

5. A digital meter counter resistant to large amplitude interference according to claim 1, characterized in that, A fixing plate (123) is fixedly provided on one side of the inner wall of the locking seat (121). A clamping plate (124) is movably provided on one side of the fixing plate (123). A clamping plate (125) is movably provided inside the clamping plate (124). A lock head (129) is fixedly provided on one side of the two support plates (122). The side of the lock head (129) near the clamping plate (124) and the clamping plate (125) is arc-shaped.

6. A digital meter counter resistant to large amplitude interference according to claim 5, characterized in that, Both clamping plate one (124) and clamping plate two (125) are fixedly provided with upright plates (126). A connecting block is movably provided on one side of the upright plate (126). A pull rope is fixed on one side of the connecting block. A pull rod (128) is fixed at the end of the pull rope away from the connecting block. One end of the pull rod (128) passes through the locking seat (121). A spring one (127) is sleeved on the pull rod (128). One end of the spring one (127) is in contact with the upright plate (126), and the other end of the spring one (127) is in contact with the fixing plate (123).

7. A digital meter counter resistant to large amplitude interference according to claim 3, characterized in that, The locking seat (121) has a slot (1220) on both the front and back inner walls. The slot (1220) is L-shaped. The support plate (122) has a block (1221) fixed on both the front and back. The block (1221) and the slot (1220) are compatible.

8. A digital meter counter resistant to large amplitude interference according to claim 7, characterized in that, The mounting box (702) has a positioning hole (709) on one side of its inner wall, and the mounting bracket (703) has a storage hole (705) on one side. A second spring (706) is fixedly installed in the storage hole (705). A guide plate (707) is fixedly installed at one end of the second spring (706). The guide plate (707) and the storage hole (705) are movably connected. A positioning rod (708) is fixedly installed on one side of the guide plate (707). The positioning rod (708) and the positioning hole (709) are compatible. The cooperation between the positioning hole (709) and the positioning rod (708) can realize the quick assembly and disassembly of the load-bearing plate (701). A pressing component (71) is provided on one side of the positioning hole (709). The pressing component (71) can press the positioning rod (708) into the storage hole (705) to reduce the difficulty of disassembling the load-bearing plate (701).

9. A digital meter counter resistant to large amplitude interference according to claim 8, characterized in that, The pressing assembly (71) includes a limiting frame (711), which is fixedly connected to the mounting box (702). Multiple limiting rods (712) are movably provided on the limiting frame (711). A pressure plate (713) is fixedly provided at one end of each of the multiple limiting rods (712). A top rod (715) is fixedly provided on one side of the pressure plate (713). A spring three (714) is sleeved on each of the multiple limiting rods (712).

10. A digital meter counter resistant to large amplitude interference according to claim 1, characterized in that, A rotating shaft (5) is fixedly provided at the center of the roller (4). A permanent magnet (6) is provided on the top outer wall of the rotating shaft (5). A shock-absorbing pad (8) is provided between the Hall position sensor (9) and the load-bearing plate (701). The shock-absorbing pad (8) has honeycomb holes distributed inside. A limiting plate (10) is fixedly provided on the outside of the Hall position sensor (9). A vertical rod (11) is movably provided on the limiting plate (10). The vertical rod (11) is fixedly connected to the load-bearing plate (701). The limiting plate (10) and the vertical rod (11) can prevent the Hall position sensor (9) from lateral displacement.

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