Residue detection device of edge grinding machine

Abstract

The utility model discloses a margin detection device of an edge grinding machine, which comprises a detection seat provided with a first magnet. The detection mechanism comprises an angle detector, a detection wheel, a swing arm and a detection shaft, the detection wheel is rotatably connected to one end of the swing arm, and the other end of the swing arm is connected with the detection shaft; the angle detector is installed on the detection seat and used for detecting the rotation angle of the detection shaft. The detection shaft is provided with a second magnet, and the second magnet and the first magnet repel each other in magnetism. The detection wheel is used for making contact with glass in the glass conveying process so as to drive the swing arm to swing and is in linkage with the detection shaft to rotate in the first direction. The second magnet is used for approaching the first magnet after the detection shaft rotates around the first direction; the second magnet is used for receiving the repulsive force of the first magnet after approaching the first magnet so as to drive the detection shaft to rotate around the second direction and link the swing arm to reset. According to the utility model, the detection wheel on the swing arm can be reset through the first magnet and the second magnet which repel each other in magnetism.

Description

TECHNICAL FIELD

[0001] The utility model relates to an edge grinding machine technical field especially relates to an edge grinding machine's excess amount detection device. BACKGROUND

[0002] In the existing glass edge grinding machine, the excess amount detection device for detecting the width of glass generally adopts detection wheel detection, when the glass passes, the edge of glass contacts with the detection wheel, drives the detection wheel to move, thereby drives the swing arm to rotate, drives the encoder output shaft to rotate through the swing arm, then the encoder sends the excess amount data of glass to the control system, and after the glass passes completely, the reset of detection wheel is driven by reset spring to reset the rotating shaft, thereby drives the swing arm and detection wheel to reset, waits for the arrival of next piece of glass, repeats the above working process.

[0003] But, because the excess amount detection action is reciprocating, the reset spring is easy to sway under the action of external force, influences detection precision, in addition, the detection wheel reciprocates and resets in the working process, so that the reset spring is easy to stretch and deform in the long-term use process, the elastic force is poor after a long time, and it is not easy to reset, and the elastic force is weakened in the use process, which also affects the reset position of detection wheel and influences the detection precision of detection wheel. UTILITY MODEL CONTENTS

[0004] In order to overcome at least one of the defects of the prior art described above, the utility model provides an excess amount detection device of edge grinding machine, which can reset the detection wheel on the swing arm through the first magnet and the second magnet repelling each other.

[0005] The utility model discloses a technical scheme that is adopted to solve the problem:

[0006] An excess amount detection device of edge grinding machine, comprising,

[0007] The detection seat is provided with a first magnet;

[0008] The detection mechanism comprises an angle detector, a detection wheel, a swing arm and a detection shaft, the detection wheel is rotatably connected to one end of the swing arm, the other end of the swing arm is connected with the detection shaft, and the detection shaft is driven to rotate in the swing process, the detection shaft is rotatably connected to the detection seat, the angle detector is installed on the detection seat and is used for detecting the rotation angle of the detection shaft, the detection shaft is provided with a second magnet, and the second magnet repels the magnetism of the first magnet;

[0009] The detection wheel is used to contact with the glass in the glass conveying process to drive the swing arm to swing and drive the detection shaft to rotate around the first direction; the second magnet is used to approach the first magnet after the detection shaft rotates around the first direction; the second magnet is used to be repelled by the first magnet after approaching the first magnet to drive the detection shaft to rotate around the second direction and drive the swing arm to reset.

[0010] Further, the detection seat is further provided with a third magnet, the third magnet is arranged at intervals with the first magnet on the rotation track of the second magnet; the third magnet is attracted to the second magnet.

[0011] Further, the third magnet is arranged at intervals with the first magnet on both sides of the rotation track.

[0012] Further, the third magnet is provided with two, and the first magnet is arranged at intervals on both sides of the rotation track.

[0013] Further, the detection seat is provided with a bearing seat, the outer periphery of the detection shaft is provided with a detection disc, the detection shaft is rotatably connected to the bearing seat through a first bearing; the top end of the detection shaft extends out of the top end of the detection seat and forms a detection end; the detection end is connected with the angle detector; the detection disc is used to rotatably cover the bottom end of the bearing seat when the detection shaft is connected to the bearing seat; the first magnet is arranged in the bearing seat; the second magnet is arranged in the detection disc.

[0014] Further, the detection wheel is connected to the swing arm through a connecting shaft; one end of the connecting shaft is rotatably connected to the detection wheel through a second bearing; the other end of the connecting shaft is connected to the swing arm.

[0015] Further, the swing arm is provided with a flat hole; the outer periphery of the connecting shaft is provided with a flat surface, and the connecting shaft is connected to the flat hole so that the flat surface is limited to abut against the flat hole.

[0016] Further, it further includes a fixed seat, and the detection seat is slidably installed on the fixed seat.

[0017] Further, the fixed seat is provided with a sliding groove, and the detection seat is provided with an adjusting hole; a connecting bolt is slidably connected in the adjusting hole; the connecting bolt passes through the adjusting hole and is used for being screwed to the fixed seat to loosen or fix the detection seat.

[0018] Further, the fixed seat is provided with an adjusting screw, the adjusting screw is threadedly connected to the detection seat, and an end of the adjusting screw away from the detection seat is provided with an adjusting wheel, and the adjusting wheel is used to drive the adjusting screw to rotate.

[0019] In summary, the utility model has the following technical effects:

[0020] In the application, the magnetic repulsion between the first magnet and the second magnet is determined by the magnetism of the first magnet and the second magnet, so the force between them is stable compared with the elastic force provided by the spring in the prior art. Therefore, the detection shaft needs to overcome the magnetic repulsion to stabilize when the detection wheel detects the swing, so the swing angle of the detection shaft will not cause the detection result to be incorrect due to unstable elastic force, thereby improving the detection accuracy.

[0021] In addition, when the detection shaft is reset, the magnetic repulsion between the second magnet on the detection shaft and the first magnet on the detection seat achieves the reset action of the detection wheel, which is also stable compared with the elastic force provided by the spring. If the elastic force provided by the spring is used to achieve the reset, the elastic force will weaken during the reciprocating stretching and compression process, and the position after the reset will change over time, affecting the detection accuracy. Resetting by magnetic repulsion has stable force and accurate reset position, thereby improving the detection accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a sectional view of the residual amount detection device of the utility model;

[0023] Figure 2 is a schematic diagram of the overall structure of the residual amount detection device of the utility model;

[0024] Figure 3 is a partial sectional view of the residual amount detection device of the utility model;

[0025] Figure 4 is a partial structure schematic diagram of the residual amount detection device of the utility model;

[0026] Figure 5 is a structure schematic diagram of the detection wheel of the utility model.

[0027] Among them, the meaning of the reference signs is as follows: 10, detection seat; 11, first magnet; 12, bearing seat; 13, first bearing; 14, third magnet; 15, adjusting hole; 20, swing arm; 30, detection wheel; 31, connecting shaft; 311, flat surface; 32, second bearing; 40, detection shaft; 41, second magnet; 42, detection disc; 50, angle detector; 60, connecting bolt; 70, fixed seat; 80, adjusting screw; 81, adjusting wheel; 82, third bearing. DETAILED DESCRIPTION

[0028] In order to better understand and implement, the technical solutions in the embodiments of the utility model will be clearly and completely described below by combining the drawings in the embodiments of the utility model.

[0029] In the description of the utility model, it is explained that, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only used for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model.

[0030] 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 the utility model belongs. The terms used in the specification of the utility model are only for the purpose of describing specific embodiments and are not intended to limit the utility model.

[0031] Referring to Figures 1-5 The utility model discloses an excess detection device of edge grinding machine, including detection seat 10 and detection mechanism, be equipped with first magnet 11 on detection seat 10. Detection mechanism includes angle detector 50, detection wheel 30, swing arm 20 and detection shaft 40, the detection wheel 30 rotatable connection in one end of swing arm 20, the other end of swing arm 20 is connected with detection shaft 40, and detection shaft 40 rotatable installation is in detection seat 10, because detection shaft 40 is connected with swing arm 20, thus swing arm 20 can drive detection shaft 40 rotation in the swing process. Above-mentioned angle detector 50 is installed in detection seat 10 and is used to detect detection shaft 40 rotation angle, is equipped with second magnet 41 on this detection shaft 40, and second magnet 41 repels with the magnetism of first magnet 11.

[0032] Specifically, detection wheel 30 contacts with glass in the glass conveying process to drive swing arm 20 swing and drive detection shaft 40 rotation around the first direction; after detection shaft 40 rotates around the first direction, second magnet 41 can be close to first magnet 11, and second magnet 41 repels after being close to first magnet 11 by first magnet 11 repulsion, to drive detection shaft 40 rotation around the second direction, and drive swing arm 20 reset in linkage.

[0033] On the basis of the above structure, when the excess detection device of the utility model is used, the excess detection device is installed on the body of glass edge grinding machine and is located at the side of the conveying assembly of glass edge grinding machine:

[0034] When the glass is normally edged, the side edge of the glass needs to have a certain amount of excess. When the glass is conveyed to the edge position by the conveying assembly of the glass edging machine, if the excess of the side edge of the glass is equal to the set excess value of the machine body, the glass is tangent to the wheel surface of the detection wheel 30 when conveyed by the conveying assembly of the glass edging machine, the detection wheel 30 is in rolling cooperation with the side edge of the glass, and the glass is guided to the edge position.

[0035] If the excess of the side edge of the glass exceeds the set excess value of the machine body, when the glass is conveyed to the excess detection device position, the side edge of the glass is in close contact with the wheel surface of the detection wheel 30, and the detection wheel 30 will move together with the glass conveying assembly in the conveying direction in the process of conveying the glass, so that the detection wheel 30 will swing the swing arm 20, and after the swing arm 20 swings, the detection shaft 40 at the other end of the swing arm 20 will also rotate relative to the detection seat 10 under the action of the swing arm 20, so that the angle detector 50 can detect the rotation of the detection shaft 40, and the angle detection signal is sent after the rotation angle of the detection shaft 40 is detected, so as to play a role in detecting the excess of the side edge of the glass.

[0036] In the embodiment, the detection shaft 40 rotates in the first direction in the process of swinging the swing arm 20, so that the second magnet 41 on the detection shaft 40 can overcome the repulsive force between the first magnets 11 and move close to the first magnets 11. After the excess detection is completed, the detection wheel 30 needs to be reset for the next side edge excess detection of the glass, at this time, the detection wheel 30 is not affected by external force without the conveying force of the conveying assembly. The first magnet 11 on the detection seat 10 and the second magnet 41 on the detection shaft 40 repel each other magnetically, the second magnet 41 on the detection shaft 40 moves away from the first magnet 11 under the action of the magnetic repulsion, and then drives the detection shaft 40 to rotate in the second direction (opposite to the first direction) in reverse, so as to reset the swing arm 20 and then drive the detection wheel 30 to reset.

[0037] That is, in the present application, the magnetic repulsion force between the first magnet 11 and the second magnet 41 is determined by the magnetic properties of the first magnet 11 and the second magnet 41, so that the force between them is more stable than the elastic force provided by the spring in the prior art. Therefore, the detection shaft 40 needs to overcome the magnetic repulsion force to stabilize when the detection wheel 30 detects the swing, so that the swing angle of the detection shaft 40 will not be wrong due to the instability of the elastic force, thereby improving the detection accuracy.

[0038] Further, when the detection shaft 40 is reset, the magnetic repulsion force between the second magnet 41 on the detection shaft 40 and the first magnet 11 on the detection seat 10 realizes the reset action of the detection wheel 30, which is more stable than the elastic force provided by the spring. If the elastic force provided by the spring is used to realize the reset, the elastic force will weaken during the reciprocating stretching and compression process, and the position after the reset will change after long-term use, which will affect the detection accuracy. The reset by the magnetic repulsion force is stable in force and accurate in reset position, thereby improving the detection accuracy.

[0039] It should be noted that how to convert the swing angle of the swing arm 20 driven by the detection wheel 30 into the specific excess value of the glass is realized by the existing edge grinding machine control system, which does not belong to the content to be protected by the present application, and will not be described in detail here.

[0040] Further, in the embodiment, a third magnet 14 is further arranged on the detection seat 10, the third magnet 14 is arranged at intervals with the first magnet 11 on the rotation track of the second magnet 41, and the third magnet 14 is magnetically attracted to the second magnet 41. The position of the third magnet 14 is the starting position of the rotation of the detection shaft 40, that is, in the initial state of the excess detection device, the second magnet 41 on the detection shaft 40 can be magnetically attracted to the third magnet 14 on the detection seat 10, and the detection shaft 40 remains stationary under the action of the magnetic attraction, so that the swing starting position of the swing arm 20 is relatively stable and is not easy to swing under the action of external force.

[0041] When the side excess of the glass exceeds the excess value set by the machine body, the side of the glass is in close contact with the wheel surface of the detection wheel 30, and the glass can drive the detection wheel 30 to move together and drive the swing arm 20 to swing. After the swing arm 20 swings, the detection shaft 40 at the other end of the swing arm 20 will overcome the magnetic attraction between the third magnet 14 and the second magnet 41 under the action of the swing arm 20, and then the detection shaft 40 starts to rotate and overcome the magnetic repulsion between the first magnet 11 and the second magnet 41, and then moves towards the first magnet 11 on the rotation track. In this way, the angle detector 50 can detect the rotation of the detection shaft 40, and the angle detection signal can be sent after the rotation angle of the detection shaft 40 is detected, so as to realize the excess detection of the side of the glass.

[0042] After the detection action is completed, the second magnet 41 on the detection shaft 40 is reset by the magnetic repulsion force of the first magnet 11 on the detection seat 10 on the one hand, and the magnetic attraction force between the second magnet 41 and the third magnet 14 is superimposed, so that the reset action force of the second magnet 41 is faster, and fast reset can be realized. And after the detection shaft 40 is reset, the second magnet 41 is attracted by the third magnet 14 and will not rotate again, so that the reset rotation is not excessive. That is, the third magnet 14 can be used as a fixed point of the starting point position in addition to providing superimposed force to realize fast reset. The detection action of the detection shaft 40 can start from the position of the third magnet 14 each time, so that the detection result is more accurate.

[0043] Further, the first magnet 11 can be distributed on both sides of the third magnet 14 in the rotation track. The second magnet 41 of the detection shaft 40 can be magnetically matched with the third magnet 14 located in the middle position. In this way, the glass can move in one direction under the action of the conveying assembly, driving the swing arm 20 to rotate in one direction. The second magnet 41 can move away from the third magnet 14 and move towards the first magnet 11 on one side to realize reset by the magnetic repulsion force of the first magnet 11 on the side. If the glass moves in the opposite direction under the action of the conveying assembly, the swing arm 20 rotates in the opposite direction. The second magnet 41 can move away from the third magnet 14 and move towards the first magnet 11 on the other side to realize reset by the magnetic repulsion force of the first magnet 11 on the corresponding side. That is, by arranging two first magnets 11 on both sides of the third magnet 14, the glass edging machine can be suitable for glass conveying in different directions without the need for adjustment according to the conveying direction, and the application range is wider.

[0044] More specifically, the above-mentioned third magnet 14 is provided with two, and the third magnet 14 is distributed on the two sides of the detection shaft 40 rotation track circumference symmetrically, and the two third magnets 14 are distributed with first magnets 11 on both sides of the rotation track. And the second magnet 41 is arranged on both sides of the detection shaft 40 symmetrically, so that no matter which direction the detection wheel 30 swings, the second magnet 41 and the third magnet 14 and the first magnet 11 on both sides of the detection shaft 40 symmetrically act at the same time, so that the force is distributed uniformly, and the reset process and rotation detection process of the detection shaft 40 are more stable.

[0045] It should be noted that the above-mentioned first magnet 11, second magnet 41 and third magnet 14 can be selected as permanent magnets in the prior art, or selected as electromagnets in the prior art, and the specific selection is based on actual needs.

[0046] Further, since the excess amount detection is realized by the angle detector 50 detecting the rotation of the detection shaft 40 linked with the swing arm 20, the rotation process of the detection shaft 40 needs to be kept smooth, so the bearing seat 12 can be arranged on the detection seat 10, and the outer periphery of the detection shaft 40 is provided with the detection disc 42, and the detection shaft 40 is rotatably connected to the bearing seat 12 through the first bearing 13, so that the rotation of the detection shaft 40 is guided by the first bearing 13, and the rotation is smooth, the rotation process of the detection shaft 40 is smooth, and the detection result is more accurate.

[0047] Specifically, on the basis of the structure of the bearing seat 12, the top end of the detection shaft 40 extends out of the top end of the detection seat 10 and forms a detection end, and the detection end is connected with the angle detector 50, and the angle detector 50 is taken as an encoder, the detection end of the detection shaft 40 can be connected with the shaft of the encoder, so that the angle detection is realized by the encoder.

[0048] And the detection disc 42 is arranged on the detection shaft 40, and the detection disc 42 can rotate to cover the bottom end of the bearing seat 12 when the detection shaft 40 is connected to the bearing seat 12, and the detection disc 42 can be sealed and rotated with the bottom end of the bearing seat 12 through a sealing element, so that the sealing state of the inside of the bearing seat 12 can be maintained, and water and dust can be prevented.

[0049] On the basis of this structure, the first magnet 11 is arranged in the bearing seat 12, and the second magnet 41 is arranged in the detection disc 42.

[0050] Of course, a bearing cavity can be arranged in the bearing seat, and the part of the detection shaft connected to the bearing seat is rotatably connected to the bearing cavity through two first bearings distributed above and below, and the first magnet is arranged at the bottom end of the bearing cavity, and the detection disc covers the bottom end of the bearing cavity.

[0051] Further, in order to facilitate the installation of the detection wheel 30 and the swing arm 20, the detection wheel 30 is connected to the swing arm 20 through the connecting shaft 31; one end of the connecting shaft 31 is rotatably connected to the detection wheel 30 through the second bearing 32, and the other end of the connecting shaft 31 is connected to the swing arm 20. In this way, the detection wheel 30 can be pivotally connected with the connecting shaft 31 through the second bearing 32, and the rotation of the detection wheel 30 is smooth.

[0052] Further, a flat hole can also be arranged on the swing arm 20, and a flat surface 311 is arranged on the outer periphery of the connecting shaft 31, and when the detection wheel 30 is installed, the connecting shaft 31 is connected to the flat hole, so that the flat surface 311 is limited and abuts against the flat hole, and the flat surface 311 can prevent the connecting shaft 31 from rotating with the swing arm 20.

[0053] Further, the excess detection device of the edging machine in the embodiment further comprises a fixing base 70, the detection base 10 is slidably installed on the fixing base 70, the fixing base 70 can be installed on the body of the glass edging machine and located at the side of the conveying assembly, and the distance between the detection wheel 30 and the side of the conveying assembly is adjusted by the sliding of the detection base 10, when the required excess is large, the detection base 10 is slid away from the side of the conveying assembly, so that the distance is increased, and thus the side excess of the reserved glass can contact the detection wheel 30. When the required excess is small, the detection base 10 is slid close to the side of the conveying assembly, so that the distance is reduced, and thus the side excess of the reserved glass can contact the detection wheel 30 in the case of being small.

[0054] More specifically, the fixing base 70 is provided with a sliding groove, and the detection base 10 is provided with an adjusting hole 15 corresponding to the sliding groove, and a connecting bolt 60 is slidably inserted into the adjusting hole 15, and the connecting bolt 60 is screwed to the fixing base 70 through the adjusting hole 15 to loosen or fix the detection base 10.

[0055] When adjusting the position of the detection base 10, the connecting bolt 60 can be rotated to loosen the detection base 10 from the fixing base 70, and at this time, the stable sliding of the detection base 10 can be guided by the sliding fit of the connecting bolt 60 and the adjusting hole 15, and after the detection base 10 is adjusted to the right position, the connecting bolt 60 is rotated to tighten the detection base 10 on the fixing base 70 to realize stable assembly.

[0056] Specifically, a gasket can be arranged between the connecting bolt 60 and the end surface of the detection base 10 to increase the friction therebetween, so that the detection base 10 is not easy to loosen after being fixed.

[0057] Further, in order to facilitate the sliding of the detection base 10 on the fixing base 70, an adjusting screw 80 can also be arranged on the fixing base 70, the adjusting screw 80 is threadedly connected to the detection base 10, an adjusting wheel 81 is arranged on the end of the adjusting screw 80 away from the detection base 10, and the adjusting wheel 81 is used to drive the adjusting screw 80 to rotate. In this way, the adjusting screw 80 can be driven to rotate by rotating the adjusting wheel 81, the adjusting screw 80 is threadedly fitted with the detection base 10, and the sliding of the connecting bolt 60 and the adjusting hole 15 is also matched, so that the detection base 10 can move forward and backward to realize position adjustment.

[0058] Of course, the adjusting screw 80 and the detection base 10 can also be rotationally fitted through a third bearing 82, so that the rotation of the adjusting screw 80 is more smooth. In addition, in the case where the adjusting screw 80 is not arranged, the movement of the detection base 10 can also be driven by other power output structures such as air cylinders, oil cylinders or screw rod transmission structures.

[0059] The technical means disclosed by the utility model scheme are not limited to the technical means disclosed by the above-mentioned embodiments, and also include technical schemes composed of any combination of the above technical features. It should be noted that, for ordinary skilled persons in the art, without departing from the principles of the utility model, a number of improvements and refinements can be made, and these improvements and refinements are also considered within the protection scope of the utility model.

Claims

1. A margin detecting device of an edger, characterized by , including, The detection seat is provided with a first magnet; The detection mechanism includes an angle detector, a detection wheel, a swing arm and a detection shaft. The detection wheel is rotatably connected to one end of the swing arm. The other end of the swing arm is connected with the detection shaft and drives the detection shaft to rotate in the swing process. The detection shaft is rotatably connected to the detection seat. The angle detector is installed on the detection seat and is used for detecting the rotation angle of the detection shaft. The detection shaft is provided with a second magnet. The second magnet repels the first magnet. The detection wheel is used to contact the glass in the glass conveying process to drive the swing arm to swing and drive the detection shaft to rotate around the first direction. The second magnet is used to approach the first magnet after the detection shaft rotates around the first direction. The second magnet is used to repel the first magnet to drive the detection shaft to rotate around the second direction and drive the swing arm to reset.

2. The excess detection device of the edging machine according to claim 1, characterized in that, The detection seat is also provided with a third magnet. The third magnet is spaced apart from the first magnet on the rotation track of the second magnet. The third magnet is attracted to the second magnet.

3. The edger's excess detection device according to claim 2, characterized in that The third magnet is spaced apart from the first magnet on both sides of the rotation track.

4. The edger's excess amount detecting device according to claim 3, wherein The third magnet is provided with two third magnets. The first magnet is spaced apart from the third magnet on both sides of the rotation track.

5. The excess detection device of the edging machine according to any one of claims 1 to 4, characterized in that, The detection seat is provided with a bearing seat. The outer periphery of the detection shaft is provided with a detection disc. The detection shaft passes through the first bearing to be rotatably connected to the bearing seat. The top end of the detection shaft extends through the top end of the detection seat and forms a detection end. The detection end is connected with the angle detector. The detection disc is used to rotatably cover the bottom end of the bearing seat when the detection shaft passes through the bearing seat. The first magnet is arranged in the bearing seat. The second magnet is arranged in the detection disc.

6. The excess detection device of the edging machine according to any one of claims 1 to 4, characterized in that, The detection wheel is connected to the swing arm through a connecting shaft. One end of the connecting shaft is rotatably connected to the detection wheel through a second bearing. The other end of the connecting shaft is connected to the swing arm.

7. The edger's excess detection device according to claim 6, wherein The swing arm is provided with a flat hole. The outer periphery of the connecting shaft is provided with a flat surface. The connecting shaft is connected to the flat hole so that the flat surface is limited to abut against the flat hole.

8. The excess detection device of the edging machine according to any one of claims 1 to 4, characterized in that, It also includes a fixed seat. The detection seat is slidably installed on the fixed seat.

9. The edger's excess detection device according to claim 8, characterized in that, The fixed seat is provided with a sliding groove. The detection seat is provided with an adjusting hole. A connecting bolt is slidably connected in the adjusting hole. The connecting bolt passes through the adjusting hole and is used for screwing to the fixed seat to loosen or fix the detection seat.

10. The edger's excess detection device according to claim 9, wherein The fixed seat is provided with an adjusting screw. The adjusting screw is threadedly connected to the detection seat. The end of the adjusting screw away from the detection seat is provided with an adjusting wheel. The adjusting wheel is used to drive the adjusting screw to rotate.

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