Pavement sweeping accessory

Abstract

The utility model provides a road surface sweeping accessory which is characterized by comprising an accessory frame, a first connecting rod, a second connecting rod, a first connecting rod and a second connecting rod, the ash removal part frame is rotationally connected with the accessory frame; the locking part is arranged on the accessory frame, and the locking part is detachably connected with the ash removal part frame; the ash removal body is detachably arranged on the ash removal part frame; the water storage body is arranged on the ash removal body, and the water storage body has a self-water-absorption characteristic; one end of the elastic piece is connected with one end of the ash removal body, and the other end of the elastic piece is connected with the ash removal part frame. The road sweeping accessory is simple in structure and convenient to install, and the installation efficiency of the road sweeping accessory can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning, in particular to a road sweeping tool. Background Art

[0002] In the prior art, there is a road sweeping tool that integrates functions of sweeping and dust cleaning and is detachable. In order to realize the mopping function of the multi-functional road sweeping tool, a water supply pipe and a corresponding water supply tank are arranged in the corresponding mopping assembly in the prior art. The water supply pipe is generally connected to the mop head for mopping work in a plug-in manner, and a flow controller is also arranged on the water pipe. The relevant components of the mop head are connected through a mop head mounting handle, and the relevant water supply tank is fixedly arranged on the tool frame. The water supply pipeline is connected to the water tank, and additional power supply is required to ensure the operation of the water supply system. The structures of each functional part are cumbersome, the connection relationships are complex, and the installation is inconvenient. To improve the installation efficiency, it is necessary to provide a road sweeping tool that is convenient to install in terms of structure. Content of the Utility Model

[0003] To solve the problems of complex structure and inconvenient installation of the road sweeping tool in the prior art, the utility model provides a road sweeping tool that is convenient to install in terms of structure, including: a tool frame, on which a first installation position is provided; a dust cleaning part frame, which is movably connected to the tool frame; a locking part, which is arranged on the tool frame and is detachably connected to the dust cleaning part frame; a dust cleaning body, which is detachably arranged on the dust cleaning part frame; a water storage body, which is arranged on the dust cleaning body and has the characteristic of self-absorbing water; an elastic part, one end of which is connected to one end of the dust cleaning body, and the other end of which is connected to the dust cleaning part frame.

[0004] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: The first installation position on the tool frame is used to install and connect the dust cleaning part frame. The first installation position only fixes one end of the dust cleaning part frame. During installation, push the side of the dust cleaning part frame connected to the first installation position to make the dust cleaning part frame close to the tool frame, and snap the dust cleaning part frame with the locking part to fix the dust cleaning part frame on the tool frame. One end of the dust cleaning body is connected to the dust cleaning part frame through an elastic part, and the other end is directly matched with the dust cleaning part frame to complete the installation. The water storage body is a water-absorbing material with the characteristic of self-absorbing water, which can provide the water required for the work of the dust cleaning body without external pipeline water supply. The characteristic of the elastic part to recover deformation can strengthen the connection between the other end of the dust cleaning body and the dust cleaning part frame. When the locking part locks the position of the dust cleaning part frame, it also locks the connection at the direct matching part between the dust cleaning body and the dust cleaning part frame, so that the dust cleaning body is not easily disengaged during the working process. When replacing the dust cleaning body, it is not necessary to disassemble the entire dust cleaning part frame, and only the connection between the dust cleaning part frame and the locking part needs to be released.

[0005] In an embodiment of the present utility model, the locking portion includes: a fixing member and a connecting member. The fixing member is provided on the attachment frame; the connecting member is provided on the fixing member, and the connecting member is snap-connected to the dust cleaning portion frame.

[0006] Compared with the prior art, the technical effects achieved after adopting this technical solution: In this technical solution, the fixing member is used to realize the fixed connection between the locking portion and the attachment frame, and the snap connection between the connecting member and the dust cleaning portion frame can lock the rotatable dust cleaning portion frame on the attachment frame at a certain angular position, thereby realizing the relative fixed connection between the dust cleaning portion frame and the attachment frame, enabling the dust cleaning portion frame to more stably support the dust cleaning body during the working process.

[0007] In an embodiment of the present utility model, the dust cleaning portion frame includes: a frame body and a mounting member. The frame body is provided with a second mounting position for cooperating with the elastic member; the mounting member is provided on the frame body, and the mounting member cooperates with the first mounting position.

[0008] Compared with the prior art, the technical effects achieved after adopting this technical solution: In this technical solution, through the cooperation between the mounting member and the first mounting position on the attachment frame, the rotational connection between the dust cleaning portion frame and the attachment frame is realized. Thus, the dust cleaning portion frame can have a more flexible working angle, can adapt to diverse environmental conditions, and can also provide multi-angle perspectives when installing the dust cleaning body, facilitating the installation of the dust cleaning body. The cooperation between the second mounting position and the elastic member enables the elastic member to be connected to the frame body.

[0009] In an embodiment of the present utility model, the dust cleaning portion frame further includes: a locking and fixing member. The locking and fixing member is provided on the frame body, and the locking and fixing member is snap-connected to the connecting member.

[0010] Compared with the prior art, the technical effects achieved after adopting this technical solution: Realize the connection between the dust cleaning portion frame and the locking member, enabling the dust cleaning body to work stably at a certain fixed angle.

[0011] In an embodiment of the present utility model, the dust cleaning body includes: a dust cleaning blanket and a hem. The hem is provided at both ends of the dust cleaning blanket, one end of the hem is connected to the elastic member, and the other end of the hem is connected to the frame body. A water storage body is provided on the dust cleaning blanket.

[0012] Compared with the prior art, the technical effects achieved after adopting this technical solution: The dust cleaning blanket is the main body that contacts the road surface during the working process of the dust cleaning body. The water storage body provides the working water required for the dust cleaning work of the dust cleaning blanket, enabling the dust cleaning body to work without additional water supply or connecting additional pipelines during the working process. The hem is fixedly connected to the dust cleaning portion frame by connecting and cooperating with the elastic member and the frame body, thereby realizing the dust cleaning function of the road surface cleaning attachment.

[0013] In an embodiment of the present utility model, the edge locking includes: a first edge locking and a second edge locking. A first edge locking hole is provided on the first edge locking; a second edge locking hole is provided on the second edge locking; one end of the elastic member is engaged with the first edge locking hole of the dust cleaning body, and the other end of the elastic member is engaged with the second mounting position on the frame body; the first edge locking hole on the dust cleaning body is engaged with the elastic member, and the second edge locking hole is connected to the frame body.

[0014] Compared with the prior art, the technical effect achieved after adopting this technical solution: realizing the detachable connection between the dust cleaning body and the dust cleaning part frame.

[0015] In an embodiment of the present utility model, the road surface cleaning implement further includes: a cleaning part frame and a cleaning body. The cleaning part frame is movably connected to the implement frame; the cleaning body is detachably connected to the cleaning part frame.

[0016] Compared with the prior art, the technical effect achieved after adopting this technical solution: realizing the sweeping function of the road surface cleaning implement. In an embodiment of the present utility model, specifically, one end of the cleaning part frame is connected to the implement frame, and the other end is movable, thereby forming a rotatable connection, so that the entire cleaning part frame does not need to be disassembled during the disassembly and assembly of the cleaning body.

[0017] In an embodiment of the present utility model, the cleaning part frame includes: a support part and a first connection part. The support part is detachably connected to the cleaning body; the first connection part is provided at one end of the support part and is rotatably connected to the implement frame.

[0018] Compared with the prior art, the technical effect achieved after adopting this technical solution: the support part is used to support and fix the cleaning body, and the first connection part is used to realize the rotatable connection between the cleaning part frame and the implement frame. The rotatable connection enables the cleaning part frame to have more working angles, can adapt to diverse environmental conditions, and can also provide multi-angle perspectives during the installation of the cleaning body, facilitating the installation of the cleaning body.

[0019] In an embodiment of the present utility model, the cleaning part frame further includes: a second connection part. The second connection part is provided at the other end of the support part and is detachably connected to the locking part.

[0020] Compared with the prior art, the technical effect achieved after adopting this technical solution: through the first connection part and the second connection part, the cleaning part frame can be relatively fixedly connected to the implement frame, enabling the cleaning body to work stably at a certain fixed angle.

[0021] In an embodiment of the present utility model, the support part is provided with installation protrusions; both ends of the cleaning body are provided with installation through holes; the installation protrusions are engaged with the installation through holes.

[0022] Compared with the prior art, the technical effects achieved by adopting this technical solution are as follows: The detachable installation of the cleaning body is realized, and the convex and through-hole structures are simple, which is convenient for installation and production, and has obvious advantages compared with the side-by-side plug-in installation structure in the prior art. Brief Description of the Drawings

[0023] Figure 1 It is an overall view of a road surface cleaning implement;

[0024] Figure 2 It is an overall view of the implement frame;

[0025] Figure 3 It is an overall view of the dust cleaning part of the road surface cleaning implement;

[0026] Figure 4 It is a partial view A of the dust cleaning part of the road surface cleaning implement;

[0027] Figure 5 It is a partial view B of the dust cleaning part of the road surface cleaning implement;

[0028] Figure 6 It is an overall view of the cleaning part of the road surface cleaning implement;

[0029] Figure 7 It is a partial view C of the cleaning part of the road surface cleaning implement;

[0030] Figure 8 It is a partial view D of the rotating connection between the cleaning part and the implement frame;

[0031] Figure 9 It is a schematic connection diagram of the elastic member and the dust cleaning part frame;

[0032] Figure 10 It is a partial view E of the connection between the elastic member and the dust cleaning part frame.

[0033] Description of the Reference Numerals in the Drawings:

[0034] 1 - Implement frame; 108 - First installation position; 2 - Dust cleaning part frame; 21 - Frame body; 205 - Second installation position; 22 - Installation part; 23 - Locking and fixing part; 4 - Locking part; 41 - Fixing part; 42 - Connecting part; 3 - Dust cleaning body; 31 - Dust cleaning blanket; 32 - Water storage body; 33 - Edge lock; 331 - First edge lock; 332 - Second edge lock; 305 - First edge lock hole; 307 - Second edge lock hole; 6 - Cleaning part frame; 61 - Support part; 605 - Installation protrusion; 62 - First connection part; 63 - Second connection part; 7 - Cleaning body; 705 - Installation through hole; 8 - Elastic member. Detailed Description of the Embodiments

[0035] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model will be given with reference to the accompanying drawings.

[0036] like Figure 1 , Figure 2 and Figure 3 As shown, the present embodiment provides a road cleaning accessory, which includes: an accessory frame 1, on which a first mounting position 108 is provided; a cleaning portion frame 2, which is movably connected to the accessory frame 1; a locking portion 4, which is provided on the accessory frame 1 and is detachably connected to the cleaning portion frame 2; a cleaning body 3, which is detachably provided on the cleaning portion frame 2; a water storage body 32, which is provided on the cleaning body 3 and has a self-absorbent property; an elastic member 8, one end of the elastic member 8 is connected to one end of the cleaning body 3, and the other end of the elastic member 8 is connected to the cleaning portion frame 2.

[0037] Specifically, in this embodiment, the cleaning part frame 2 and the attachment frame 1 are detachably connected in rotation.

[0038] The first mounting position 108 on the accessory frame 1 is used to install and connect the cleaning part frame 2. The first mounting position 108 only fixes one end of the cleaning part frame 2. During installation, the cleaning part frame 2 is pushed to connect with the first mounting position 108, so that the cleaning part frame 2 is close to the accessory frame 1. The cleaning part frame 2 is engaged with the locking part 4 to fix the cleaning part frame 2 on the accessory frame 1. One end of the cleaning body 3 is connected to the cleaning part frame 2 through the elastic member 8, and the other end is directly matched with the cleaning part frame 2 to complete the installation. The water storage body 32 is a water-absorbing material with its own water-absorbing properties, which can provide the cleaning body 3 with water required for work without the need for external pipeline water supply. The elastic member 8 has the feature of restoring deformation, which can strengthen the connection between the other end of the cleaning body 3 and the cleaning part frame 2. When the locking part 4 locks the position of the cleaning part frame 2, it also locks the connection between the cleaning body 3 and the cleaning part frame 2, so that the cleaning body 3 is not easy to fall out during operation. When replacing the cleaning body 3 , there is no need to dismantle the entire cleaning part frame 2 , and only the connection between the cleaning part frame 2 and the locking part 4 needs to be released.

[0039] like Figure 3 and Figure 4 As shown, the locking part 4 includes: a fixing member 41 and a connecting member 42. The fixing member 41 is arranged on the attachment frame 1; the connecting member 42 is arranged on the fixing member 41, and the connecting member 4 is clamped with the dust cleaning part frame 2.

[0040] Preferably, in this embodiment, the locking portion 4 is specifically a movable buckle, and there is a certain accommodating space in the fixing member 41. In the accommodating space, on the side away from the connecting member 42, an operating piece is provided extending out of the accommodating space, and the connecting member 42 can be controlled to be locked or loosened by toggling the operating piece.

[0041] like Figure 4As shown, the fixing member 41 is provided with two connecting holes on the surface connected to the attachment frame 1. Optionally, the fixing member 41 can be connected to the attachment frame by bolts or by welding.

[0042] The fixing member 41 is used to realize the fixed connection between the locking portion 4 and the attachment frame 1. The connecting member 42 is snap-connected to the dust cleaning portion frame 2, and the rotatable dust cleaning portion frame 2 on the attachment frame 1 can be locked at a certain angular position, thereby realizing the relative fixed connection between the dust cleaning portion frame 2 and the attachment frame 1, so that the dust cleaning portion frame 2 can more stably support the dust cleaning body 3 during the working process.

[0043] As Figure 2 、 Figure 3 、 Figure 5 As shown, the dust cleaning portion frame 2 includes: a frame body 21 and a mounting member 22. The frame body 21 is provided with a second mounting position 205 for cooperating with the elastic member 8; the mounting member 22 is provided on the frame body 21, and the mounting member 22 cooperates with the first mounting position 108.

[0044] The mounting member 22 is provided on the frame body 21, on the side away from the side where the frame body 21 cooperates with the locking portion 4. Specifically, it is provided on the upper part of the side away from the side where the frame body 21 cooperates with the locking portion 4. In terms of the structure of the mounting member 22, it is a Z-shaped hook structure formed by at least two bends, and it cooperates with the first mounting position 108 by hanging.

[0045] The lower part of the first mounting position 108 has a cylindrical structure at the contact with the mounting member 22. The surface of the cylindrical structure is smooth, which can make the rotation of the mounting member 22 on the first mounting position 108 more smooth, and make the rotational connection between the dust cleaning portion frame 2 and the attachment frame 1 more flexible.

[0046] Through the cooperation between the mounting member 22 and the first mounting position 108 on the frame body 21, the rotational connection between the dust cleaning portion frame 2 and the attachment frame 1 is realized. Thus, the dust cleaning portion frame 2 can have a more flexible working angle, can adapt to diverse environmental conditions, and can also provide multi-angle perspectives when installing the dust cleaning body 3, which is convenient for the installation of the dust cleaning body 3. The second mounting position 205 cooperates with the elastic member 8, so that the elastic member 8 can be connected to the frame body 21.

[0047] As Figure 4 As shown, the dust cleaning portion frame 2 further includes: a locking and fixing member 23. The locking and fixing member 23 is provided on the frame body 21, and the locking and fixing member 23 is snap-connected to the connecting member 42.

[0048] The frame body 21 has a plate-like structure that bends and extends towards the locking portion 4, and the locking and fixing member 23 is specifically provided at the end of the bending and extension of the plate-like structure.

[0049] For example, the locking and fixing member 23 can be a hook-shaped structure integrally formed with the frame 21 and then formed by a stamping process, or it can be independently formed and be an independent component connected or welded to the end of the plate-shaped bending extension of the frame 21 by bolts.

[0050] The locking and fixing member 23 realizes the connection between the dust cleaning part frame 2 and the locking member 4, enabling the dust cleaning body 3 to work stably at a certain fixed angle.

[0051] As Figure 3 shown, the dust cleaning body 3 includes: a dust cleaning blanket 31 and a hemming 33. The hemming 33 is provided at both ends of the dust cleaning blanket 31. One end of the hemming 33 is connected to the elastic member 8, and the other end of the hemming 33 is connected to the frame; the water storage body 32 is provided on the dust cleaning blanket 31.

[0052] Specifically, the water storage body 32 is arranged on the side away from the contact surface with the road surface when the dust cleaning blanket 31 is working. Preferably, the water storage body is a water-absorbing sponge. The sponge has good water absorption performance, can effectively store the working water required when the dust cleaning blanket 31 is working, and the sponge material is easy to obtain, convenient to clean and replace, which can effectively reduce the overall manufacturing cost of the dust cleaning body 3.

[0053] The dust cleaning blanket 31 is the main body that contacts the road surface when the dust cleaning body 3 is working. The water storage body 32 provides the working water required for the dust cleaning of the dust cleaning blanket 31, enabling the dust cleaning body 3 not to require additional water supply during the working process. The hemming 33 is fixedly connected to the dust cleaning part frame 2 through connection and cooperation with the elastic member 8 and the frame 21, thereby realizing the dust cleaning function of the road surface cleaning attachment.

[0054] As Figure 4 、 Figure 5 、 Figure 9 and Figure 10 shown, the hemming includes: a first hemming 331 and a second hemming 332. A first hemming hole 305 is provided on the first hemming 331; a second hemming hole 307 is provided on the second hemming 332; one end of the elastic member 8 is fitted with the first hemming hole 305 of the dust cleaning body 3, and the other end of the elastic member 8 is fitted with the second installation position 205 on the frame 21; the first hemming hole 305 on the dust cleaning body 3 is fitted with the elastic member 8, and the second hemming hole 307 is connected to the frame 21.

[0055] Preferably, the elastic member 8 is specifically a spring, and hook-shaped structures that can be fitted with the installation position or hole are provided at both ends of the spring. The spring structure is simple and convenient for installation.

[0056] Specifically, the first hemming hole 305 and the second hemming hole 307 are nearly rectangular, and the long sides are parallel to the long side of the hemming 33, and the short sides are arc structures, so that the first hemming hole 305 and the second hemming hole 307 have more space in the direction parallel to the long side of the hemming 33, facilitating installation.

[0057] On the long side of the first hemming hole 305 near the long side of the hemming 33, there is also a nearly semicircular arc notch, which facilitates the hooking of the elastic member 8.

[0058] Specifically, the second hemming hole 307 is connected to the frame body 21. The second hemming hole 307 is sleeved over the plate-shaped bent extension on the frame body 21, so as to be sleeved and hung on the frame body 21.

[0059] Thus, the detachable connection between the dust cleaning body 3 and the dust cleaning part frame 2 is realized.

[0060] As Figure 6 shown, the road surface cleaning implement further includes: a cleaning part frame 6 and a cleaning body 7. The cleaning part frame 6 is movably connected to the implement frame 1; the cleaning body 7 is detachably connected to the cleaning part frame 6, thereby realizing the sweeping function of the road surface cleaning implement. In this embodiment, specifically, one end of the cleaning part frame 6 is connected to the implement frame 1, and the other end is movable, thereby forming a rotatable connection, so that the whole cleaning part frame 6 does not need to be disassembled during the process of disassembling and assembling the cleaning body 7.

[0061] As Figure 7 and Figure 8 shown, the cleaning part frame 6 includes: a support part 61 and a first connection part 62. The support part 61 is detachably connected to the cleaning body 7; the first connection part 62 is arranged at one end of the support part 61 and is rotatably connected to the implement frame 1.

[0062] A plurality of support parts 61 can be provided. In this embodiment, the support parts 61 are arranged at both ends of the implement frame 1. Specifically, they are arranged perpendicular to the first installation position 108 on the implement frame.

[0063] On the side of the implement frame 1 opposite to the first installation position 108, there is an installation position that can be connected to the first connection part 62. This installation position can be formed by stamping and bending after being integrally formed with the implement frame 1, or it can be an independent component connected to the implement frame by welding or other means.

[0064] The first connection part 62 has a cylindrical hollow tube structure. The installation positions are arranged in parallel at both ends of the annular cross-section of the first connection part 62. There are installation holes on the installation positions. The first connection part 62 can be connected to the implement frame 1 through a shaft pin or a bolt.

[0065] The support part 61 is used to support and fix the cleaning body 7, and the first connection part 62 is used to realize the rotatable connection between the cleaning part frame 6 and the implement frame 1. The rotatable connection can enable the cleaning part frame 6 to have more working angles, can adapt to various environmental conditions, and can also provide multi-angle perspectives when installing the cleaning body 7, which is convenient for the installation of the cleaning body 7.

[0066] Refer to again Figure 7, the cleaning unit frame 6 further includes: a second connecting portion 63. The second connecting portion 63 is provided at the other end of the supporting portion 61 and is detachably connected to the locking portion 4.

[0067] The second connecting portion 63 has a hook-shaped structure bent towards the supporting portion 61.

[0068] For example, the second connecting portion 63 can be a hook-shaped structure integrally formed and bent with the supporting portion 61, or an independent component connected to the supporting portion 61 by means such as welding.

[0069] Through the first connecting portion 62 and the second connecting portion 63, the cleaning unit frame 6 can be relatively fixedly connected to the attachment frame 1, so that the cleaning body 7 can work stably at a certain fixed angle.

[0070] Mounting protrusions 605 are provided on the supporting portion 61; mounting through holes 705 are provided at both ends of the cleaning body 7; the mounting protrusions 605 cooperate with the mounting through holes 705. Thus, the detachable installation of the cleaning body 7 is realized. The protrusion and through hole structures are simple, facilitating installation and production, and having obvious advantages compared with the existing side-by-side plug-in installation structure.

[0071] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims.

Claims

1. A road cleaning accessory, characterized in that: include: An attachment frame, wherein a first mounting position is provided on the attachment frame; A dust cleaning part frame, the dust cleaning part frame is movably connected to the attachment frame; A locking part, arranged on the attachment frame, wherein the locking part is detachably connected to the dust cleaning part frame; A ash cleaning body, the ash cleaning body being detachably arranged on the ash cleaning part frame; A water storage body is provided on the ash cleaning body, and the water storage body has a self-absorption property; An elastic member, one end of which is connected to one end of the cleaning body, and the other end of which is connected to the cleaning part frame.

2. The road cleaning attachment according to claim 1, characterized in that: The locking portion comprises: A fixing member, arranged on the attachment frame; A connecting piece is arranged on the fixing piece, and the connecting piece is clamped with the dust cleaning part frame.

3. The road cleaning attachment according to claim 2, characterized in that: The cleaning part framework comprises: A frame, wherein the frame is provided with a second mounting position cooperating with the elastic member; The mounting member is arranged on the frame, and the mounting member cooperates with the first mounting position.

4. The road cleaning attachment according to claim 3, characterized in that: The dust cleaning part frame also includes: A locking fixture is disposed on the frame, and the locking fixture is engaged with the connecting member.

5. The road cleaning attachment according to claim 4, characterized in that: The soot cleaning body comprises: Dust cleaning blanket; Locking edges are arranged at both ends of the dust cleaning blanket, one end of the locking edge is connected to the elastic member, and the other end of the locking edge is connected to the frame; The water storage body is arranged on the dust cleaning blanket.

6. The road cleaning attachment according to claim 5, characterized in that: The edge locking comprises: A first locking edge, wherein the first locking edge is provided with a first locking hole; A second locking edge, wherein the second locking edge is provided with a second locking edge hole; One end of the elastic member is matched with the first locking hole of the ash cleaning body, and the other end of the elastic member is matched with the second mounting position on the frame; The first locking hole on the cleaning body cooperates with the elastic member, and the second locking hole is connected to the frame.

7. The road cleaning attachment according to any one of claims 1 to 6, characterized in that: Also includes: A cleaning unit frame, the cleaning unit frame is movably connected to the attachment frame; A cleaning body is detachably connected to the cleaning part frame.

8. The road cleaning attachment according to claim 7, characterized in that: The cleaning unit frame comprises: A support portion, the support portion being detachably connected to the cleaning body; The first connection part is arranged at one end of the support part and is rotatably connected to the attachment frame.

9. The road cleaning attachment according to claim 8, characterized in that: The cleaning unit frame also includes: The second connecting portion is arranged at the other end of the supporting portion and is detachably connected to the locking portion.

10. The road cleaning attachment according to claim 9, characterized in that: The support portion is provided with a mounting protrusion; The two ends of the cleaning body are provided with mounting through holes; The mounting protrusion cooperates with the mounting through hole.

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