Surface treatment tool

Abstract

The invention discloses a surface treatment tool which comprises a machine shell, a driving assembly, a transmission system and a working accessory, the driving assembly is arranged in the machine shell and comprises a motor, and a motor shaft of the motor can rotate along with the axis of the motor; the transmission system comprises an input shaft and an output shaft, the input shaft can rotate along with an input axis, and the output shaft can rotate along with an output axis; the working accessory is connected with the output shaft; a first plane P1 is defined, an intersection point of the first plane P1 and an input axis is a first intersection point C1, an intersection point of the first plane P1 and an output axis is a second intersection point C2, a connecting line generated by the first intersection point C1 and the second intersection point C2 is a transmission center line, and an included angle between a projection line of a motor axis to the first plane P1 and the transmission center line is a first included angle alpha, the first included angle alpha is larger than or equal to 90 degrees and smaller than or equal to 170 degrees. The whole machine is not in linear layout any more, and other parts can be conveniently arranged in the space between the motor axis and the transmission center line.

Description

Technical Field

[0001] The present application relates to an electric tool, in particular to a surface treatment tool. Background Art

[0002] A surface treatment tool in the related art, the motor drives the wire drawing wheel to rotate through the reduction mechanism, and the wire drawing wheel rotates to polish the surface to be polished. The reduction mechanism usually includes a primary bevel gear transmission mechanism and a secondary pulley transmission mechanism, and the wire drawing wheel is arranged on the output shaft of the pulley transmission mechanism. In the existing wire drawing machine, the reduction mechanism is arranged in front of the motor so that the motor axis is parallel to the center line of the belt, that is, the whole machine is basically arranged in a straight line in the front and rear directions, so that the space under the whole machine is small, which is not convenient for the arrangement of other components.

[0003] This section provides background information related to the present application which is not necessarily prior art. Summary of the invention

[0004] One object of the present application is to solve or at least alleviate part or all of the above problems. To this end, one object of the present application is to provide a surface treatment tool.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions:

[0006] A surface treatment tool comprises: a casing; a driving assembly, which is arranged in the casing, the driving assembly comprises a motor, and the motor shaft of the motor can rotate with the motor axis; a transmission system, which is driven to rotate by the motor, the transmission system comprises an input shaft and an output shaft, the input shaft can rotate with the input axis, the output shaft can rotate with the output axis, the input shaft is connected to the motor shaft, and the output shaft is connected to the input shaft by driving; a working accessory, which is connected to the output shaft, and the working accessory can rotate around the output axis; a first plane P1 is defined, the first plane P1 is basically perpendicular to the left and right direction of the surface treatment tool, the intersection of the first plane P1 and the input axis is the first intersection C1, the intersection of the first plane P1 and the output axis is the second intersection C2, the line formed by the first intersection C1 and the second intersection C2 is the transmission center line, the angle between the projection line of the motor axis to the first plane P1 and the transmission center line is the first angle α, and the first angle α is greater than or equal to 90 degrees and less than or equal to 170 degrees.

[0007] In some embodiments, the first angle α is greater than or equal to 120 degrees and less than or equal to 160 degrees.

[0008] In some embodiments, along the extension direction of the input shaft, the spacing between the motor axis and the transmission centerline is a first spacing L, and the first spacing L is greater than or equal to 4 cm and less than or equal to 10 cm.

[0009] In some embodiments, a dust suction port is provided at the lower portion of the housing, and dust generated by the surface treatment tool is discharged from the dust suction port into the dust collection device, and the dust suction port is located between the motor axis and the transmission center line.

[0010] In some embodiments, a dust suction pipe is provided at the dust suction port, and in the vertical direction, the dust suction pipe at least partially overlaps with the casing.

[0011] In some embodiments, the dust suction port is located below the motor.

[0012] In some embodiments, the transmission system further includes a first housing and a belt transmission mechanism disposed in the first housing, the belt transmission mechanism transmission-connects an input shaft and an output shaft, and both the input shaft and the output shaft are disposed in the first housing.

[0013] In some embodiments, the belt drive mechanism is located in front of the motor and offset to the left or right of the motor axis.

[0014] In some embodiments, the belt transmission mechanism includes a driving pulley, a driven pulley, and a belt wound around the driving pulley and the driven pulley. The driving pulley is disposed on the input shaft, and the driven pulley is disposed on the output shaft.

[0015] In some embodiments, a shaft locking structure is provided on the first housing, and the shaft locking structure can lock the driven pulley.

[0016] In some embodiments, the transmission system further includes a second housing and a bevel gear transmission mechanism disposed in the second housing, the input shaft passes through the second housing, and the bevel gear transmission mechanism transmission-connects the motor shaft and the input shaft.

[0017] In some embodiments, the bevel gear transmission mechanism includes a first bevel gear and a second bevel gear, the first bevel gear is disposed on the motor shaft, the second bevel gear is disposed on the input shaft, and the first bevel gear is meshed with the second bevel gear.

[0018] In some embodiments, the transmission system also includes a connecting shell, the second shell is located between the connecting shell and the first shell, the second shell and the casing are detachably connected via a first locking member, and the first shell, the second shell and the connecting shell are detachably connected via a second locking member.

[0019] In some embodiments, it also includes: a battery pack, a mounting portion is formed or connected on the casing, the battery pack is detachably arranged on the mounting portion, a second angle β is formed between the plugging and unplugging direction of the battery pack and the motor axis, and the second angle β is greater than or equal to 0 degrees and less than or equal to 90 degrees.

[0020] In some embodiments, the second angle β is equal to 90 degrees, and the plugging and unplugging direction of the battery pack is parallel or perpendicular to the central axis of the output shaft.

[0021] In some embodiments, the second angle β is greater than or equal to 10 degrees and less than or equal to 80 degrees.

[0022] In some embodiments, it also includes: a power cord, a connecting portion is formed on the housing, and the power cord is connected to the connecting portion.

[0023] In some embodiments, an auxiliary handle is provided on the housing, and the auxiliary handle has a receiving cavity, and the receiving cavity is used to store a wrench.

[0024] In some embodiments, the wrench can be inserted into the accommodating cavity along a second straight line direction, and the second straight line is perpendicular to the motor axis.

[0025] In some embodiments, the wrench is magnetically connected to the auxiliary handle.

[0026] In some embodiments, the input axis is substantially parallel to the output axis.

[0027] In some embodiments, at least one of the input axis and the output axis is substantially perpendicular to the motor axis.

[0028] In some embodiments, a grip portion is formed on the housing, and an angle formed by the motor axis and an extension direction of the grip portion is greater than 0 and less than 90 degrees.

[0029] In some embodiments, the working accessory is connected to the output shaft via a flat key, a groove for matching the flat key is provided on the working accessory, and the flat key and the output shaft can be attracted to each other magnetically.

[0030] The benefits of the present application are as follows: the central axis of the motor shaft is the motor axis, defining a first plane P1, the first plane P1 is substantially perpendicular to the left-right direction of the surface treatment tool, the intersection of the first plane P1 and the input axis is the first intersection C1, the intersection of the first plane P1 and the output axis is the second intersection C2, the line formed by the first intersection C1 and the second intersection C2 is the transmission center line, the angle between the projection line of the motor axis onto the first plane P1 and the transmission center line is the first angle α, the first angle α is greater than or equal to 90 degrees and less than or equal to 170 degrees, the entire machine is no longer in a straight line layout, and the space between the motor axis and the transmission center line is convenient for arranging other components. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the structure of a surface treatment tool provided by this application. Figure 1 ;

[0032] Figure 2 This is a schematic diagram of the structure of a surface treatment tool provided by this application. Figure 2 ;

[0033] Figure 3 This is a schematic diagram of the structure of a surface treatment tool provided by this application. Figure 3 ;

[0034] Figure 4 This is a partial structural decomposition diagram of a surface treatment tool provided by this application Figure 1 ;

[0035] Figure 5 This is a partial structural decomposition diagram of a surface treatment tool provided by this application Figure 2 ;

[0036] Figure 6 is a schematic diagram of the shaft lock structure provided by the present application;

[0037] Figure 7 It is a partial structural schematic diagram of a surface treatment tool provided by the present application;

[0038] Figure 8 is a partial structural schematic diagram of a surface treatment tool provided by the present application showing a first plane;

[0039] Fig. 9 is a front view of a surface treatment tool provided by the present application showing a partial structure of a first plane;

[0040] Fig.10 is a top view of a partial structure of a surface treatment tool provided by the present application;

[0041] Fig.11 It is a front view of a partial structure of a surface treatment tool provided by the present application;

[0042] Fig.12 is a top view of a partial structure of another surface treatment tool provided by the present application;

[0043] Fig.13 is a schematic diagram of the axis of another surface treatment tool provided by the present application;

[0044] Fig.14 It is a front view of a surface treatment tool provided by the present application;

[0045] Fig.15 This is a schematic diagram of the decomposition structure of a surface treatment tool provided by this application Figure 1 ;

[0046] Fig.16 is a front view of a partial structure of another surface treatment tool provided by the present application;

[0047] Fig.17 is a front view of a partial structure of another surface treatment tool provided by the present application;

[0048] Fig.18This is a schematic diagram of the decomposition structure of a surface treatment tool provided by this application Figure 2 ;

[0049] Fig.19 It is a schematic diagram of the exploded view of the output shaft and the flat key provided in this application.

[0050] In the figure:

[0051] 100. Surface treatment tools;

[0052] 10. housing; 101. grip; 102. suction port; 103. suction pipe; 104. assembly line; 105. first straight line;

[0053] 20. driving assembly; 21. motor; 211. motor shaft; 212. motor axis; 22. trigger;

[0054] 30. Transmission system; 301. Transmission center line; 31. Input shaft; 311. Input axis; 32. Output shaft; 322. Groove; 321. Output axis; 33. First housing; 331. Step hole; 34. Belt transmission mechanism; 341. Active pulley; 342. Driven pulley; 3421. Stop hole; 343. Belt; 3431. Belt extension line; 35. Second housing; 36. Bevel gear transmission mechanism; 361. First bevel gear; 362. Second bevel gear; 37. Connecting housing; 38. Second locking member; 39. Flat key; 391. Arc portion; 392. First surface; 393. Second surface;

[0055] 40. Working accessories; 41. Protective cover; 42. Gasket; 43. Locking piece; 44. Mounting opening;

[0056] 50. Battery pack;

[0057] 60. Auxiliary handle; 601. Accommodation cavity;

[0058] 70. Axis lock structure; 71. Limit rod; 72. Button; 73. Limit protrusion;

[0059] 80. Wrench. DETAILED DESCRIPTION

[0060] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above drawings.

[0061] In this application, the terms "comprises", "includes", "has" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0062] In this application, the term "and / or" is a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects before and after are in an "and / or" relationship.

[0063] In the present application, the terms "connect", "combine", "couple", and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, direct connection refers to two parts or components being connected together without the need for an intermediate piece, and indirect connection refers to two parts or components being connected to at least one intermediate piece respectively, and the two parts or components being connected via the intermediate piece. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings, and may include electrical connections or couplings.

[0064] In the present application, it will be understood by those of ordinary skill in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerances caused by manufacturing, assembly, and use associated with a specific value, and the like. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0065] In this application, it will be understood by those skilled in the art that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0066] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, the bottom can include directly below, lower left, lower right, lower front, and lower back, etc.

[0067] like Figures 1 to 4 As shown, the present application provides a surface treatment tool 100, which can be a grinding machine, a grinder, a wire drawing machine, etc. The surface treatment tool 100 includes a housing 10, a drive assembly 20, a transmission system 30 and a working accessory 40. The drive assembly 20 is arranged in the housing 10. The drive assembly 20 includes a motor 21, and the motor 21 has a motor shaft 211. The central axis of the motor shaft 211 is the motor axis 212; the transmission system 30 is driven to rotate by the motor 21. The transmission system 30 includes an input shaft 31 and an output shaft 32. The input shaft 31 can rotate with the input axis 311, and the output shaft 32 can rotate with the output axis 321. The input shaft 31 is connected to the motor shaft 211, and the output shaft 32 is connected to the input shaft 31. The working accessory 40 is connected to the output shaft 32, and the working accessory 40 can rotate around the output axis 321. The motor shaft 211 drives the input shaft 31 to rotate, and then drives the output shaft 32 to rotate, driving the working accessory 40 to rotate.

[0068] The surface treatment tool 100 also includes an energy source, which is used to provide energy to the surface treatment tool 100. The energy source can be alternating current or direct current, such as a portable mobile power source such as a battery pack 50. In some embodiments, the surface treatment tool 100 includes a battery pack 50, and a mounting portion is formed or connected on the housing 10, and the battery pack 50 is detachably arranged on the mounting portion. In some embodiments, the surface treatment tool 100 includes a power cord, and a connecting portion is formed on the housing 10, and the power cord is connected to the connecting portion.

[0069] The housing 10 extends substantially in the front-to-back direction, the working attachment 40 is arranged at the front of the housing 10, and the energy source is arranged at the rear end of the housing 10. A grip portion 101 is formed on the housing 10 to facilitate operation of the surface treatment tool 100. The grip portion 101 is located at the rear of the housing 10. The extension direction of the grip portion 101 is the front-to-back direction, and the left and right sides of the extension direction of the grip portion 101 are the left-right direction.

[0070] The surface treatment tool 100 also includes a trigger 22, which is arranged at the front end of the grip 101 and located at the lower side of the housing 10. The trigger 22 is used to control the start and stop of the motor 21. The setting position of the trigger 22 is convenient for start and stop operations when gripping.

[0071] The housing 10 is provided with an auxiliary handle 60, and the auxiliary handle 60 has a receiving cavity 601, and the receiving cavity 601 is used to store the wrench 80. By providing the receiving cavity 601 on the auxiliary handle 60, the space can be fully utilized to store the wrench 80 or other accessories. In some embodiments, the auxiliary handle 60 is U-shaped, and the auxiliary handle 60 is arranged on the front side of the housing 10 and extends upward. In the front and rear directions, the auxiliary handle 60 is tilted, which conforms to the ergonomic design, is non-slip and comfortable, has a good grip, and is effortless to work for a long time, thereby enhancing the user experience.

[0072] In some embodiments, the output shaft 32 and the input shaft 31 may be connected by a gear transmission mechanism. Figure 4 and Figure 5 As shown, the transmission system 30 also includes a first housing 33 and a belt transmission mechanism 34 disposed in the first housing 33. The belt transmission mechanism 34 transmits and connects the input shaft 31 and the output shaft 32. Both the input shaft 31 and the output shaft 32 are disposed in the first housing 33. By adopting the belt transmission mechanism 34, the stability of the working accessory 40 during use can be effectively guaranteed, the frequency of the overall vibration of the working accessory 40 and the surface treatment tool 100 can be reduced, and the generation of noise can be reduced, thereby enhancing the user's experience.

[0073] The belt transmission mechanism 34 includes a driving pulley 341 , a driven pulley 342 , and a belt 343 wound around the driving pulley 341 and the driven pulley 342 . The driving pulley 341 is disposed on the input shaft 31 , and the driven pulley 342 is disposed on the output shaft 32 .

[0074] The first housing 33 is provided with a shaft locking structure 70, which can lock the driven pulley 342. Locking the driven pulley 342 means locking the output shaft 32, which can prevent the belt 343 from being broken due to excessive force when installing or removing the working accessory 40.

[0075] like Figure 5 and Figure 6As shown, the shaft lock structure 70 includes a limiting rod 71 and a spring (not shown), the limiting rod 71 is elastically connected to the first housing 33 through the spring, the limiting rod 71 can move between a locked position and an unlocked position, a plurality of limiting holes 3421 are arranged around the axis on the driven pulley 342, when the limiting rod 71 is in the locked position, the limiting rod 71 is inserted into the limiting hole 3421, when the limiting rod 71 is in the unlocked position, the limiting rod 71 is disengaged from the limiting hole 3421. When the operator presses one end of the limiting rod 71, the limiting rod 71 can be driven to move from the unlocked position to the locked position, when the operator releases the limiting rod 71, the spring is reset under its own elastic action, and the limiting rod 71 can be driven to move from the locked position to the unlocked position.

[0076] Specifically, a button 72 is provided at one end of the limiting rod 71, which is convenient for the operator to press. A limiting protrusion 73 is circumferentially provided on the limiting rod 71, and a stepped hole 331 is provided on the first housing 33. The limiting rod 71 is inserted into the stepped hole 331, and the limiting protrusion 73 limits the limiting rod 71 to prevent the limiting rod 71 from escaping from the stepped hole 331. A spring is sleeved on the limiting rod 71, and one end of the spring abuts against the button 72, and the other end of the spring abuts against the stepped surface of the stepped hole 331.

[0077] like Figure 4 and Figure 7 As shown, the transmission system 30 further includes a second housing 35 and a bevel gear transmission mechanism 36 disposed in the second housing 35 . The input shaft 31 passes through the second housing 35 . The bevel gear transmission mechanism 36 transmission-connects the motor shaft 211 and the input shaft 31 .

[0078] The bevel gear transmission mechanism 36 includes a first bevel gear 361 and a second bevel gear 362 . The first bevel gear 361 is disposed on the motor shaft 211 , and the second bevel gear 362 is disposed on the input shaft 31 . The first bevel gear 361 is meshed with the second bevel gear 362 .

[0079] The transmission system 30 also includes a connecting shell 37, the second shell 35 is located between the connecting shell 37 and the first shell 33, the second shell 35 and the casing 10 are detachably connected via a first locking member, and the first shell 33, the second shell 35 and the connecting shell 37 are detachably connected via a second locking member 38.

[0080] During installation, the motor shaft 211 and the first bevel gear 361 are first inserted into the second housing 35, and the second housing 35 and the housing 10 are connected by the first locking member; the input shaft 31 is then inserted into the second housing 35, so that the first bevel gear 361 is meshed with the second bevel gear 362, at which time the first housing 33 abuts against one side of the second housing 35, and then the connecting housing 37 abuts against the other side of the second housing 35, and the first housing 33, the second housing 35 and the connecting housing 37 are connected by the second locking member 38. The first locking member and the second locking member 38 can be bolts.

[0081] like Figure 8 and Fig. 9 As shown, a first plane P1 is defined, the first plane P1 is substantially perpendicular to the left and right directions of the surface treatment tool 100, the intersection of the first plane P1 and the input axis 311 is the first intersection C1, the intersection of the first plane P1 and the output axis 321 is the second intersection C2, the line formed by the first intersection C1 and the second intersection C2 is the transmission center line 301, and the angle between the projection line of the motor axis 212 onto the first plane P1 and the transmission center line 301 is the first angle α, and the first angle α is greater than or equal to 90 degrees and less than or equal to 170 degrees. The whole machine is no longer in a straight line layout, and the space between the transmission center line 301 and the motor axis 212 is convenient for arranging other components. When the motor axis 212 is located on the first plane P1, the first angle α is the angle between the transmission center line 301 and the motor axis 212. When the motor axis 212 intersects or is substantially parallel to the first plane P1 , the first angle α is the angle between the projection line of the motor axis 212 onto the first plane P1 and the transmission center line 301 .

[0082] In some embodiments, the first angle α is greater than or equal to 120 degrees and less than or equal to 160 degrees. In some embodiments, the first angle α is equal to 130 degrees, 140 degrees, 150 degrees, or 155 degrees.

[0083] In some embodiments, the angle formed by the motor axis 212 and the extension direction of the grip portion 101 is greater than 0 and less than 90 degrees, which is convenient for gripping. In some embodiments, the grip portion 101 extends substantially along the first straight line 105, and the first straight line 105 is within the first plane P1.

[0084] When the housing is divided into two detachable parts, the two parts are buckled together to form an assembly line 104. In some embodiments, the assembly line 104 is located in the first plane P1. In some embodiments, the assembly line 104 is located outside the first plane P1, and the motor 21 is offset in the housing 10.

[0085] like Fig.10 and Fig.11As shown, in one embodiment, the input axis 311 is substantially parallel to the output axis 321 , which is convenient for arranging the transmission mechanism. The input axis 311 is substantially perpendicular to the motor axis 212 , and the output axis 321 is substantially perpendicular to the motor axis 212 .

[0086] When the belt transmission mechanism 34 is used, the belt 343 is wound around the driving pulley 341 and the driven pulley 342, and the belt 343 basically extends along the belt extension line 3431. Along the extension direction of the input shaft 31, the distance between the motor axis 212 and the belt extension line 3431 is a first distance L, and the first distance L is greater than or equal to 4 cm and less than or equal to 10 cm to ensure the balance of the whole machine. In some embodiments, the first distance L is greater than or equal to 5 cm and less than or equal to 8 cm.

[0087] The belt transmission mechanism 34 is located in front of the motor 21 and is biased to the left or right side of the motor axis 212. In this embodiment, the belt transmission mechanism 34 is biased to the right side of the motor axis 212. Usually, the operator holds the housing 10 with the right hand, and the belt transmission mechanism 34 is biased to the right side of the motor axis 212, so that the working accessory 40 on the output shaft 32 is close to the operator for easy observation.

[0088] In some embodiments, at least one of the input axis 311 and the output axis 321 is substantially perpendicular to the motor axis 212. In one embodiment, the input axis 311 is substantially perpendicular to the motor axis 212, and the input axis 311 and the output axis 321 are arranged at an angle. Fig.12 As shown, the output axis 321 is substantially perpendicular to the motor axis 212 , and the input axis 311 and the output axis 321 are arranged at an angle.

[0089] In some embodiments, Fig.13 As shown, the input axis 311 and the output axis 321 are arranged at an angle, and the input axis 311 and the output axis 321 are not perpendicular to the motor axis 212 .

[0090] like Figure 8 and Fig.14 As shown, a dust suction port 102 is provided at the bottom of the housing 10, and the dust generated by the surface treatment tool 100 is discharged into the dust collection device through the dust suction port 102, and the dust suction port 102 is located between the motor axis 212 and the transmission center line 301. The space between the motor axis 212 and the transmission center line 301 is fully utilized to optimize the overall layout of the machine. In the prior art, the dust suction port 102 is located at a relatively high position, and the dust needs to be lifted up before being sucked away, and the dust suction efficiency is low. The dust suction port 102 of the present application is located at a relatively low position, and the dust is directly sucked away, and the dust suction efficiency is high.

[0091] Specifically, a shield 41 is provided on the periphery of the working attachment 40, and a dust suction port 102 is provided on the shield 41. The shield 41 is connected to the housing of the transmission system 30. In some embodiments, the dust suction port 102 is located below the motor 21. In some embodiments, the dust suction port 102 is located below the motor axis 212. In some embodiments, the dust suction port 102 is located below the auxiliary handle 60. In some embodiments, the dust suction port 102 is located below the belt 343.

[0092] A dust suction pipe 103 is provided at the dust suction port 102, and a certain space is provided between the motor axis 212 and the transmission center line 301, so that the dust suction pipe 103 can avoid obstructing the movement of the tool. In the vertical direction, the dust suction pipe 103 at least partially overlaps with the housing 10. In some embodiments, the dust suction pipe 103 extends parallel to the motor axis 212, so that the dust suction pipe 103 is completely located behind the working accessory 40 to avoid obstructing the movement of the tool.

[0093] The dust suction pipe 103 is detachable for easy maintenance, and can be specifically connected by a thread. The dust suction port 102 can also be connected to a vacuum cleaner.

[0094] The dust suction pipe 103 is arranged in a stepped structure, that is, the inner diameter of the dust suction pipe 103 becomes smaller and smaller from the end connected to the protective cover 41 to the direction away from the protective cover 41, thereby effectively improving the dust removal efficiency.

[0095] like Figures 15 to 17 As shown, a second angle β is formed between the plug-in direction A1 of the battery pack 50 and the motor axis 212, and the second angle β is greater than or equal to 0 degrees and less than or equal to 90 degrees. In some embodiments, the second angle β is equal to 90 degrees, and the plug-in direction A1 of the battery pack 50 is perpendicular to the motor axis 212. At this time, the plug-in direction A1 of the battery pack 50 is parallel or perpendicular to the output axis 321. In some embodiments, the second angle β is greater than or equal to 10 degrees and less than or equal to 80 degrees. In some embodiments, the second angle β is greater than or equal to 30 degrees and less than or equal to 60 degrees.

[0096] The wrench 80 can be inserted into the accommodating cavity 601 along the direction of the second straight line B1, and the second straight line B1 is perpendicular to the motor axis 212. In other words, the wrench 80 is basically inserted into the accommodating cavity 601 along the left-right direction, and the opening of the accommodating cavity 601 is located on the left or right side of the auxiliary handle 60, which does not affect the grip of the top of the auxiliary handle 60. The working attachment 40 can be disassembled by the wrench 80. There are many types of working attachments 40, which can be replaced as needed.

[0097] In some embodiments, the wrench 80 is magnetically connected to the auxiliary handle 60. In some embodiments, the wrench 80 is snap-connected to the auxiliary handle 60.

[0098] like Fig.18 and Fig.19 As shown, the working accessory 40 is connected to the output shaft 32 via two flat keys 39. When the flat key 39 is correctly installed in the groove 322 of the output shaft 32, the mounting opening 44 of the working accessory 40 can be installed on the output shaft 32. By providing two flat keys 39, the transmission effect and stability between the working accessory 40 and the output shaft 32 are better. A gasket 42 and a locking member 43 are provided at the end of the output shaft 32 to limit the working accessory 40. The locking member 43 can be installed and removed by a wrench 80.

[0099] Most of the existing flat keys are in the shape of a cuboid, and their cross-section is generally a rectangle, but the long side and the wide side of the rectangle are not much different, so it is not easy to distinguish. During installation, they are often installed upside down. When the working accessory 40 is installed, it is found that they cannot fit and need to be reinstalled, which affects the assembly efficiency.

[0100] like Fig.19 As shown, the flat key 39 provided in the present application has an arc portion 391 formed at at least one end of the flat key 39, so that the flat key 39 has a first surface 392 and a second surface 393 of different shapes, the first surface 392 is basically rectangular, and the end of the second surface 393 has an arc, so it is easy to distinguish during assembly, thereby improving assembly efficiency.

[0101] In some embodiments, the flat key 39 is magnetic, and the flat key 39 can be attracted to the output shaft 32 to prevent the flat key 39 from falling off when the working accessory 40 is installed.

[0102] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the above embodiments do not limit the present application in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present application.

Claims

1. A surface treatment tool, comprising: chassis; A drive assembly is disposed in the housing, wherein the drive assembly comprises a motor, and a motor shaft of the motor can rotate along with the motor axis; A transmission system, driven to rotate by the motor, the transmission system comprising an input shaft and an output shaft, the input shaft can rotate along with the input axis, the output shaft can rotate along with the output axis, the input shaft is connected to the motor shaft, and the output shaft is in driving connection with the input shaft; A working accessory connected to the output shaft, the working accessory being rotatable around the output axis; Features: A first plane P1 is defined, wherein the first plane P1 is substantially perpendicular to the left-right direction of the surface treatment tool, the intersection of the first plane P1 and the input axis is a first intersection C1, the intersection of the first plane P1 and the output axis is a second intersection C2, the line formed by the first intersection C1 and the second intersection C2 is a transmission center line, the angle between the projection line of the motor axis onto the first plane P1 and the transmission center line is a first angle α, and the first angle α is greater than or equal to 90 degrees and less than or equal to 170 degrees.

2. The surface treatment tool according to claim 1, characterized in that: The first angle α is greater than or equal to 120 degrees and less than or equal to 160 degrees.

3. The surface treatment tool according to claim 1, characterized in that: Along the extension direction of the input shaft, the distance between the motor axis and the transmission center line is a first distance L, and the first distance L is greater than or equal to 4 cm and less than or equal to 10 cm.

4. The surface treatment tool according to claim 1, characterized in that: The lower part of the housing is provided with a dust suction port, and dust generated by the surface treatment tool is discharged into the dust collecting device through the dust suction port, and the dust suction port is located between the motor axis and the transmission center line.

5. The surface treatment tool according to claim 4, characterized in that: A dust suction pipe is arranged at the dust suction port, and in the vertical direction, the dust suction pipe at least partially overlaps with the housing.

6. The surface treatment tool according to claim 4, characterized in that: The dust suction port is located below the motor.

7. The surface treatment tool according to claim 1, characterized in that: The transmission system further includes a first housing and a belt transmission mechanism disposed in the first housing. The belt transmission mechanism is transmission-connected between the input shaft and the output shaft. Both the input shaft and the output shaft are disposed through the first housing.

8. The surface treatment tool according to claim 7, characterized in that: The belt transmission mechanism is located in front of the motor and biased to the left or right side of the motor axis.

9. The surface treatment tool according to claim 7, characterized in that: The belt transmission mechanism comprises a driving pulley, a driven pulley and a belt wound around the driving pulley and the driven pulley. The driving pulley is arranged on the input shaft, and the driven pulley is arranged on the output shaft.

10. The surface treatment tool according to claim 9, characterized in that: The first housing is provided with a shaft locking structure, and the shaft locking structure can lock the driven pulley.

11. The surface treatment tool according to claim 7, characterized in that: The transmission system further includes a second housing and a bevel gear transmission mechanism disposed in the second housing. The input shaft passes through the second housing. The bevel gear transmission mechanism is transmission-connected between the motor shaft and the input shaft.

12. The surface treatment tool according to claim 11, characterized in that: The bevel gear transmission mechanism includes a first bevel gear and a second bevel gear, the first bevel gear is arranged on the motor shaft, the second bevel gear is arranged on the input shaft, and the first bevel gear is meshed with the second bevel gear.

13. The surface treatment tool according to claim 11, characterized in that: The transmission system also includes a connecting shell, the second shell is located between the connecting shell and the first shell, the second shell and the casing are detachably connected via a first locking member, and the first shell, the second shell and the connecting shell are detachably connected via a second locking member.

14. The surface treatment tool according to claim 1, characterized in that: Also includes: A battery pack, a mounting portion is formed or connected on the housing, the battery pack is detachably arranged on the mounting portion, a second angle β is formed between the plugging and unplugging direction of the battery pack and the motor axis, and the second angle β is greater than or equal to 0 degrees and less than or equal to 90 degrees.

15. The surface treatment tool according to claim 14, characterized in that: The second angle β is equal to 90 degrees, and the plugging and unplugging direction of the battery pack is parallel or perpendicular to the central axis of the output shaft.

16. The surface treatment tool according to claim 14, characterized in that: The second angle β is greater than or equal to 10 degrees and less than or equal to 80 degrees.

17. The surface treatment tool according to claim 1, characterized in that: Also includes: A power cord is formed on the housing with a connecting portion, and the power cord is connected to the connecting portion.

18. The surface treatment tool according to claim 1, characterized in that The housing is provided with an auxiliary handle, and the auxiliary handle has a receiving cavity, and the receiving cavity is used for accommodating a wrench.

19. The surface treatment tool according to claim 18, characterized in that The wrench can be inserted into the accommodating cavity along a second straight line direction, and the second straight line is perpendicular to the motor axis.

20. The surface treatment tool according to claim 18, characterized in that The wrench is magnetically connected to the auxiliary handle.

21. The surface treatment tool according to claim 1, characterized in that The input axis is substantially parallel to the output axis.

22. The surface treatment tool according to claim 1, characterized in that At least one of the input axis and the output axis is substantially perpendicular to the motor axis.

23. The surface treatment tool according to claim 1, characterized in that A gripping portion is formed on the housing, and an angle formed by the motor axis and an extending direction of the gripping portion is greater than 0 and less than 90 degrees.

24. The surface treatment tool according to claim 1, characterized in that The working accessory is connected to the output shaft via a flat key. A groove for matching the flat key is provided on the working accessory. The flat key and the output shaft can be attracted to each other magnetically.

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