Drop rod detection device and window cleaning machine

Abstract

The present application discloses a drop rod detection device and a window cleaning machine. The drop rod detection device comprises: a fixed bracket, an elastic member, and a drop rod; the fixed bracket is mounted on the front stop structure of the window cleaning machine; the drop rod is movably inserted into the fixed bracket; one end of the drop rod that movably extends from the fixed bracket toward the surface to be cleaned is provided with a head; the other end that extends from the fixed bracket away from the surface to be cleaned is provided with a limiter that movably contacts the fixed bracket; the head is provided with a stopper and a guide; the stopper contacts a side wall of a gap along the travel direction of the window cleaning machine; the guide slides in contact with a frameless edge and the upper edge of the other side wall of the gap; the elastic member is used to apply a force to the drop rod toward the surface to be cleaned. The device can be used to accurately detect gaps, frameless edges, etc., thereby enabling the window cleaning machine to avoid the occurrence of pressure relief that would cause the window cleaning machine to fall, thereby ensuring overall operating efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of window cleaning machines, and in particular to a drop rod detection device and a window cleaning machine. Background Art

[0002] As intelligent tools for cleaning windows and exterior walls of buildings and structures, safety is a key consideration. Current window cleaning machines still have some shortcomings, such as inaccurate and timely detection of gaps and unframed edges on windows and exterior walls. This can easily lead to over-cleaning of gaps and unframed edges, which can cause the machine to lose pressure and lose contact with the glass or exterior wall, requiring repositioning before operation can resume, reducing overall efficiency. Summary of the Invention

[0003] In view of this, the first purpose of this application is to provide a drop rod detection device that can be used to accurately detect gaps, borderless edges, etc., so that the window cleaning machine can avoid them in time and avoid pressure relief that may cause the window cleaning machine to fall, thereby ensuring overall operating efficiency.

[0004] The second object of this application is to provide a window cleaning machine.

[0005] To achieve the above technical objectives, the present application provides a drop rod detection device, comprising: a fixed bracket, an elastic member, and a drop rod;

[0006] The fixing bracket is installed on the front barrier structure of the window cleaning machine;

[0007] The drop rod is movably provided on the fixed bracket, and one end of the drop rod that is movably extended from the fixed bracket toward the surface to be cleaned is provided with a head, and the other end that is extended from the fixed bracket away from the surface to be cleaned is provided with a limiting portion that is movably in contact with the fixed bracket;

[0008] The head is provided with a stopper and a guide;

[0009] The stopping portion contacts a side wall of the gap along the traveling direction of the window cleaning machine;

[0010] The guide portion is in sliding contact with the edge without a frame and the upper edge of the other side wall of the gap;

[0011] The elastic member is used to apply a force to the drop rod toward the surface to be cleaned.

[0012] Furthermore, the head is specifically a quarter-sphere structure;

[0013] The head has a plumb surface and an arc surface;

[0014] The vertical plane forms the stop portion and is perpendicular to the travel direction of the window cleaning machine and the surface to be cleaned respectively;

[0015] The arc surface forms the guide portion.

[0016] Furthermore, the fixing bracket includes a bracket plate portion and a first cylindrical portion;

[0017] The first column portion is vertically connected to the bottom of the bracket plate portion;

[0018] The first column portion is provided with a through cavity which penetrates the bracket plate portion and allows the drop rod to movably pass through.

[0019] Furthermore, the fixing bracket further includes at least two second cylindrical parts;

[0020] The two second cylindrical portions are vertically connected to the two side ends of the bracket plate portion and are symmetrically arranged relative to the bracket plate portion;

[0021] A mounting hole for fixing is provided in the second cylindrical portion.

[0022] Furthermore, the plumb plane of the head coincides with a center line on one end surface of the drop rod.

[0023] Furthermore, a connecting sleeve portion is sleeved on one end of the drop rod;

[0024] The head is arranged on the outer end surface of the connecting sleeve and has the same diameter as the connecting sleeve;

[0025] The arc surface of the head portion is smoothly connected to the cylindrical surface of the connecting sleeve portion.

[0026] Furthermore, the elastic member is specifically a compression spring;

[0027] The elastic member is sleeved on the drop rod, and one end of the elastic member contacts and abuts against the inner end wall of the through cavity of the first cylindrical portion, and the other end contacts and abuts against the connecting sleeve portion.

[0028] Furthermore, the outer peripheral wall of the drop rod is provided with reinforcing ribs arranged along its own length direction.

[0029] Furthermore, it also includes rollers corresponding one to one with the drop rod detection devices;

[0030] The roller is sleeved on the fixing bracket.

[0031] A window cleaning machine, comprising a window cleaning machine body and the drop rod detection device;

[0032] The drop rod detection device is installed on the front barrier structure of the window cleaning machine body.

[0033] Furthermore, the drop rod detection device is installed at a corner position of the front stop structure.

[0034] As can be seen from the above technical solutions, the present application provides a drop bar detection device for use in the front stop structure of a window cleaning machine. The elastic member is configured to apply a force to the drop bar toward the surface to be cleaned. This allows the window cleaning machine, under the action of the spring, to move toward the surface of the window / exterior wall, triggering a sensing element in the drop bar. This feedback is then provided to the window cleaning machine, enabling the machine to promptly control its retreat to avoid the edge / gap. Furthermore, the head of the drop bar is designed to include not only a guide portion for convenient retreat guidance but also a stop portion that contacts a side wall of the gap along the direction of travel of the window cleaning machine. This stop portion design accommodates smaller gaps. Even if the drop bar head fails to move into position due to a small gap and fails to trigger the sensing element, the stop portion allows the head to contact the gap along the travel direction, thereby compressing the front stop structure and triggering it. The front stop structure then acquires gap information, allowing the machine to reverse and avoid the gap. In summary, the provided drop rod detection device not only has a detection function, but can also be flexibly used in combination with the front barrier structure. By triggering the front barrier structure to detect gap conditions, it can accurately detect gaps, borderless edges, etc., so that the window cleaning machine can avoid driving in time and avoid pressure relief that causes the window cleaning machine to fall, thereby ensuring overall operating efficiency.

[0035] It can be seen from the above technical solutions that the present application also provides a window cleaning machine, including a window cleaning machine body and the above-mentioned drop rod detection device, which has the function of accurately detecting gaps, edges without borders, etc., can accurately avoid obstacles, avoid pressure relief and cause falling, and ensure overall operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0037] Figure 1 This is an overall cross-sectional view of a drop rod detection device provided in this application;

[0038] Figure 2 A cross-sectional view of a drop bar of a drop bar detection device provided in this application;

[0039] Figure 3This is an axonometric diagram of a drop rod detection device provided in this application;

[0040] Figure 4 A schematic diagram of a drop rod detection device provided in this application cooperating with a front stop structure;

[0041] Figure 5 This is a schematic diagram of an explosion in which a drop rod detection device provided in this application is in cooperation with a front stop structure;

[0042] Figure 6 This is a schematic diagram of the overall structure of a window cleaning machine provided in this application;

[0043] Figure 7 a is a partial schematic diagram of a window cleaning machine provided in the present application before it reaches a frameless edge;

[0044] Figure 7 b is a partial schematic diagram of a window cleaning machine provided in the present application, in which the drop rod is completely dropped when the window cleaning machine reaches the edge of the frameless frame;

[0045] Figure 8 a is a partial schematic diagram of a window cleaning machine provided in the present application before it reaches the leading edge of a gap;

[0046] Figure 8 b is a partial schematic diagram of a window cleaning machine provided in the present application, showing a state where the drop bar is completely dropped when the window cleaning machine reaches the front edge of the gap;

[0047] Figure 8 c is a partial schematic diagram of a window cleaning machine provided in the present application showing a partially fallen state of a drop rod when the window cleaning machine reaches the front edge of a gap;

[0048] In the figure: 1. Fixed bracket; 11. Bracket plate; 12. First column; 13. Second column; 2. Drop rod; 21. Limiting part; 22. Head; 221. Vertical plane; 222. Arc surface; 23. Connecting sleeve; 24. Reinforcing rib; 3. Elastic member; 4. Ball; 100. Main structure; 200. Adsorption device; 300. Traveling device; 400. Cleaning assembly; 500. Front block structure; 501. Third column. DETAILED DESCRIPTION

[0049] The following will clearly and completely describe the technical solutions of the embodiments of the present application in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present application, not all of them. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the embodiments of the present application.

[0050] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0051] In the description of the embodiments of the present application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, replaceable connections, or integral connections. They can also refer to mechanical connections or electrical connections. They can also refer to direct connections or indirect connections through an intermediate medium. They can also refer to internal connections between two components. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0052] The embodiments of the present application disclose a drop rod detection device and a window cleaning machine.

[0053] See also Figures 1 to 5 As shown, an embodiment of a drop rod detection device provided in the embodiments of the present application includes:

[0054] A fixed bracket 1, an elastic member 3 and a drop rod 2; the fixed bracket 1 is installed on the front stop structure 500 of the window cleaning machine; the drop rod 2 is movably inserted into the fixed bracket 1, and one end of the drop rod 2 that is movably extended from the fixed bracket 1 toward the surface to be cleaned is provided with a head 22, and the other end that is extended from the fixed bracket 1 away from the surface to be cleaned is provided with a limiting portion 21 that is movably in contact with the fixed bracket 1; the head 22 is provided with a stop portion and a guide portion; the stop portion is in stop contact with one side wall of the gap along the moving direction of the window cleaning machine; the guide portion is in sliding contact with the frameless edge and the upper edge of the other side wall of the gap; the elastic member 3 is used to apply a force to the drop rod 2 toward the surface to be cleaned.

[0055] Specifically, the drop bar 2 can be equipped with a sensing element for sensing the complete drop of the drop bar 2 and providing feedback to the window cleaning robot. The sensing element can be built-in, such as a multi-axis acceleration sensor. Of course, the sensing element can also be installed at the bottom of the limiter 21. When the drop bar 2 falls into place, the limiter 21 contacts the fixed bracket 1, thereby triggering the sensing element. In this design, the sensing element can be a proximity switch or other sensor. Of course, the sensing element can also be a photoelectric sensor for detecting the displacement of the limiter to determine whether the drop bar has fallen into place, such as an optical coupler detection sensor. Those skilled in the art can make appropriate modifications based on the above application, and the specific details are not limited. The surface to be cleaned specifically refers to the window / exterior wall surface. When the window cleaning machine moves to the point where the head 22 of the drop bar 2 completely or partially falls into the gap, the stopper can contact a side wall of the gap, thereby effectively limiting and blocking the window cleaning machine from continuing to move forward, thereby squeezing the front block structure 500, thereby triggering the collision sensor of the front block structure 500 to provide feedback to the window cleaning machine, allowing the window cleaning machine to retreat and avoid.

[0056] In general, the present application provides a drop bar detection device, which is applied to the front stop structure 500 of a window cleaning machine. The elastic member 3 provided can be used to apply a force to the drop bar 2 toward the white surface to be cleaned, so that when the window cleaning machine reaches a gap or a frameless edge, the drop bar 2 can move toward the surface of the window / exterior wall under the action of the spring, thereby triggering the sensing element in the drop bar 2, which is then fed back to the window cleaning machine, and the window cleaning machine can promptly control itself to retreat to avoid the frameless edge / gap. In addition, the head 22 of the drop bar 2 is designed to have not only a guide portion for convenient retreat guidance, but also a stop portion that contacts the side wall of the gap along the direction of travel of the window cleaning machine. The design of the stopper can adapt to the situation where some gaps are small. In this way, even if the head 22 of the drop rod 2 cannot move into place due to the small gap and cannot trigger the sensing element, under the action of the stopper, the head 22 can contact and resist the gap along the direction of travel, thereby squeezing the front block structure 500, and then triggering the front block structure 500. The gap information is obtained by using the front block structure 500, so that the gap can be avoided by backing up. In summary, the drop rod detection device provided not only has a detection function, but can also be flexibly used in combination with the front block structure 500. By triggering the front block structure 500 to detect the gap situation, it can accurately detect gaps, borderless edges, etc., so that the window cleaning machine can avoid the movement in time, and avoid the pressure relief that causes the window cleaning machine to fall, thereby ensuring overall operation efficiency.

[0057] The above is the first embodiment of a drop rod detection device provided by the embodiment of the present application. The following is the second embodiment of a drop rod detection device provided by the embodiment of the present application. For details, please refer to Figures 1 to 5 as well as Figures 7 and 8 .

[0058] A drop rod detection device comprises: a fixed bracket 1, an elastic member 3 and a drop rod 2; the fixed bracket 1 is mounted on the front stop structure 500 of a window cleaning machine; the drop rod 2 is movably arranged through the fixed bracket 1, and one end of the drop rod 2 that is movably extended from the fixed bracket 1 toward the surface to be cleaned is provided with a head 22, and the other end that is extended from the fixed bracket 1 away from the surface to be cleaned is provided with a limiting portion 21 that is movably in contact with the fixed bracket 1; the head 22 is provided with a stop portion and a guide portion; the stop portion is in stop contact with a side wall of a gap along the traveling direction of the window cleaning machine; the guide portion is in sliding contact with a frameless edge and an upper edge of the other side wall of the gap; the elastic member 3 is used to apply a force to the drop rod 2 toward the surface to be cleaned.

[0059] Furthermore, the head 22 can specifically be a quarter-sphere structure; the head 22 has a vertical surface 221 and a circular arc surface 222; the vertical surface 221 forms the stop portion, and is respectively perpendicular to the travel direction of the window cleaning machine and the surface to be cleaned; the circular arc surface 222 forms the guide portion. Of course, it can also be a right-angled triangular prism structure, wherein the vertical surface of the right-angled triangular prism structure perpendicular to the end of the drop rod 2 can also serve as a stop portion, and the inclined surface opposite to the vertical surface can serve as a guide portion. Of course, it can also be a quarter-cylinder structure, wherein the vertical surface of the semi-cylinder structure perpendicular to the end of the drop rod 2 can also serve as a stop portion, and the cylindrical surface opposite to the vertical surface can serve as a guide portion. Of course, it can also be other structures that can meet the above functions, and those skilled in the art can make appropriate changes based on this, and there is no specific limitation.

[0060] The specific application process of this application can be as follows:

[0061] Take the head as a quarter sphere structure as an example, Figure 7 As shown in a-7b, the window cleaning machine moves along direction A to Figure 7 At the edge position without a frame as shown in a, the drop rod 2 gradually exceeds the edge position under the action of the elastic member 3 and the arc surface 222, and finally Figure 7 As shown in b, it falls completely and triggers the sensing element to feedback to the window cleaning machine. After the window cleaning machine receives the feedback information, it can stop moving and retreat. During the retreat process, the arc surface 222 can play a guiding role, thereby squeezing the falling rod 2 back into the fixed bracket 1, and then performing cleaning operations on other paths.

[0062] like Figure 8 As shown in a-8b-8c, the window cleaning machine moves along direction A to Figure 7 The gap position shown in a is Figure 8 As an example, if the gap of b can completely accommodate the head 22 of the drop rod 2, the drop rod 2 gradually falls into the gap under the action of the elastic member 3 and the arc surface 222, and finally Figure 8b) completely falls, at this time, the sensor element of the drop bar 2 is triggered first to feedback the window cleaning machine, and the window cleaning machine retreats to avoid the gap. If the sensor element is damaged, the window cleaning machine will continue to move, but it will be blocked by the gap due to the action of the plumb line 221 and squeeze the front block structure 500 to trigger the collision sensor of the front block structure 500, thereby feedback to the window cleaning machine, and the window cleaning machine retreats to avoid the gap. Of course, if the gap is not enough to make the drop bar 2 fall completely, it can make the drop bar 2 as shown in FIG. Figure 8 The shown part falls, and at this time the sensing element of the drop rod 2 is not triggered, but the collision sensor of the front block structure 500 can be triggered normally, thereby improving the accuracy of detection.

[0063] Furthermore, if Figure 1 、 3 As shown in Figure 4, the fixed bracket 1 may include a bracket plate portion 11 and a first column portion 12; the first column portion 12 is vertically connected to the bottom of the bracket plate portion 11; the first column portion 12 is provided with a through cavity that passes through the bracket plate portion 11 and allows the drop rod 2 to move through. Specifically, the bracket plate portion 11 and the first column portion 12 may be integrally formed to improve processing convenience. The through cavity opened in the first column portion 12 facilitates the installation and fixation of the drop rod 2 and the elastic member 3, and a fixing hole may be directly provided on the bracket plate portion 11 to facilitate fixation to the front block structure 500. Of course, the fixed bracket 1 may also include at least two second column portions 13; the two second column portions 13 are vertically connected to the two side ends of the bracket plate portion 11, and are symmetrically arranged relative to the bracket plate portion 11; the second column portion 13 is provided with a mounting hole for fixation. As shown in FIG. Figure 3 or Figure 4 Taking the installation at the corner position of the front block structure 500 as an example, the structure of the bracket plate portion 11 can be a triangular structure to adapt to the installation at the corner position of the front block structure 500. The second column portion 13 and the bracket plate portion 11 can also be integrally formed, and its layout direction can be opposite to that of the first column portion 12, that is, extending toward the top direction of the bracket plate portion 11, so that it can extend into the front block structure 500, conveniently cooperating with the third column portion 501 in the front block structure 500. The third column portion 501 is also provided with a corresponding mounting hole that cooperates with the second column portion 13, and can be fastened and connected by fasteners such as screws. In this embodiment, the side of the bracket plate portion 11 facing the surface to be cleaned is the bottom, and the side facing away from the surface to be cleaned is the top. The description of the orientation is only for better description and is not a limitation of this application.

[0064] Furthermore, the vertical plane 221 of the head 22 coincides with the center line of one end surface of the drop bar 2. That is, the head 22 is distributed in the other half of the area of ​​one end surface of the drop bar 2, and the distribution is more reasonable. Figure 1 as well as Figure 2As shown, the head 22 can be integrally formed with the drop bar 2. To facilitate providing a support area for the elastic member 3, a connecting sleeve 23 can be sleeved onto one end of the drop bar 2. The head 22 is disposed on the outer end surface of the connecting sleeve 23 and has the same diameter as the connecting sleeve 23. The arc surface 222 of the head 22 smoothly connects with the cylindrical surface of the connecting sleeve 23. Similarly, for ease of processing, the connecting sleeve 23, the head 22, and the drop bar 2 can be integrally formed, and the connecting sleeve 23 and the head 22 can be smoothly connected. This is not a specific limitation.

[0065] Furthermore, if Figure 1 As shown, the elastic member 3 can be specifically a compression spring, which is easy to install and can provide stable elastic force; the elastic member 3 is sleeved on the drop rod 2, and one end contacts and abuts against the inner end wall of the through cavity of the first cylindrical portion 12, and the other end contacts and abuts against the connecting sleeve portion 23.

[0066] Furthermore, a reinforcing rib 24 is provided along the length direction of the drop bar 2 on the outer peripheral wall thereof. The reinforcing rib 24 can make the drop bar 2 have better structural strength, so that the drop bar 2 is not easy to collide with the inner wall of the gap and bend and deform.

[0067] Further, taking the case where the fixing bracket 1 is arranged at the corner position of the front block structure 500 as an example, Figures 1 to 5 As shown, the window cleaning machine may further include rollers 4 corresponding to the drop rod detection devices; the rollers 4 are sleeved on the fixed bracket 1. The radius of the rollers 4 is larger than the corner radius of the front stop structure 500, which can improve the stability of the window cleaning machine when moving along the edge and reduce friction when moving along the edge. The rollers can be structured such as ball bearings, and the specific structure is not limited.

[0068] The present application also discloses a window cleaning machine, comprising a window cleaning machine body and a drop rod detection device; the drop rod detection device is installed on the front barrier structure 500 of the window cleaning machine body.

[0069] Specifically, if Figure 6 As shown, the window cleaning machine may include a main structure 100, an adsorption device 200, a running device 300, a cleaning assembly 400, and a front block structure 500. The main structure 100 may include a housing, an internal controller, etc. The adsorption device 200 is used to generate negative pressure to enable the window cleaning machine to adhere to the surface of the window exterior wall to be cleaned. The running device 300 may be a crawler device, etc., allowing the window cleaning machine to travel across the surface to be cleaned. The cleaning assembly 400 may include a cleaning cloth, a water supply tank, etc. The components of the above-mentioned devices can be designed with reference to the structures of commercially available window cleaning machines and are not limited to specific ones.

[0070] Furthermore, the drop rod detection device is installed at the corner position of the front block structure 500, that is, each front block structure 500 is equipped with two drop rod detection devices. The setting of the corner position can make the installation of the drop rod 2 more convenient and the combination with the front block structure 500 more compact. There is no specific restriction.

[0071] The above is a detailed introduction to a drop rod detection device and a window cleaning machine provided by the present application. For a person skilled in the art, according to the ideas of the embodiments of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A drop rod detection device, characterized in that: include: fixing brackets, elastic members and drop bars; The fixing bracket is installed on the front baffle structure of the window cleaning machine; The drop rod is movably provided on the fixed bracket, and one end of the drop rod that is movably extended from the fixed bracket toward the surface to be cleaned is provided with a head, and the other end that is extended from the fixed bracket away from the surface to be cleaned is provided with a limiting portion that is movably in contact with the fixed bracket; The head is provided with a stopper and a guide; The stopping portion contacts a side wall of the gap along the traveling direction of the window cleaning machine; The guide portion is in sliding contact with the edge without a frame and the upper edge of the other side wall of the gap; The elastic member is used to apply a force to the drop rod toward the surface to be cleaned; The head is specifically a quarter-sphere structure; the head has a vertical surface and an arc surface; the vertical surface forms the stop portion and is perpendicular to the travel direction of the window cleaning machine and the surface to be cleaned, respectively; the arc surface forms the guide portion; The outer peripheral wall of the drop rod is provided with reinforcing ribs arranged along the length direction of the drop rod.

2. A drop rod detection device according to claim 1, characterized in that: The fixing bracket includes a bracket plate portion and a first cylindrical portion; The first column portion is vertically connected to the bottom of the bracket plate portion; The first column portion is provided with a through cavity which penetrates the bracket plate portion and allows the drop rod to movably pass through.

3. A drop rod detection device according to claim 2, characterized in that: The fixing bracket further includes at least two second cylindrical parts; The two second cylindrical portions are vertically connected to the two side ends of the bracket plate portion and are symmetrically arranged relative to the bracket plate portion; A mounting hole for fixing is provided in the second cylindrical portion.

4. A drop rod detection device according to claim 2, characterized in that: The plumb plane of the head coincides with the center line of one end surface of the drop rod.

5. A drop rod detection device according to claim 4, characterized in that: A connecting sleeve is sleeved on one end of the drop rod; The head is arranged on the outer end surface of the connecting sleeve and has the same diameter as the connecting sleeve; The arc surface of the head portion is smoothly connected to the cylindrical surface of the connecting sleeve portion.

6. A drop rod detection device according to claim 5, characterized in that: The elastic member is specifically a compression spring; The elastic member is sleeved on the drop rod, and one end of the elastic member contacts and abuts against the inner end wall of the through cavity of the first cylindrical portion, and the other end contacts and abuts against the connecting sleeve portion.

7. A drop rod detection device according to claim 1, characterized in that: Also included are rollers corresponding one-to-one to the drop bar detection devices; The roller is sleeved on the fixing bracket.

8. A window cleaning machine, characterized in that: It comprises a window cleaning machine body and a drop rod detection device according to any one of claims 1 to 7; The drop rod detection device is installed on the front barrier structure of the window cleaning machine body.

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