Polishing machine and electric tool

Abstract

The polishing machine comprises a machine shell, a motor, a main shaft, a mounting shaft, a limiting piece and a locking mechanism, the main shaft is in transmission connection with a motor shaft of the motor, and the main shaft can rotate around a first axis relative to the machine shell; the mounting shaft is detachably connected with the main shaft, and movement of the mounting shaft drives the locking mechanism, so that the locking mechanism allows the limiting piece to move to limit movement of the mounting shaft in the first axis direction. According to the polishing machine, the locking mechanism is arranged, so that a user can complete butt joint and locking of the mounting shaft and the main shaft through one-time operation, the operation step of mounting the working head is simplified, and the efficiency of replacing the working head is improved.

Description

Technical Field

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

[0002] A polishing machine in the related art is an electric tool used for mechanical grinding, polishing and waxing of parts. Polishing machines, also known as grinders, are widely used in many fields such as automobiles and construction.

[0003] The polishing machine includes a main body, a working head and a base plate, wherein the working head is connected to the main body, different working heads have different eccentricities, and different working heads can be installed on the main body to achieve different working tracks or motion modes, and the base plate is connected to the working head, and the base plate is used to connect polishing paper and other consumables, and the base plate is replaceable. However, when the existing working head is installed on the main body, the user needs to operate in two steps. The first step is to pull down the operating sleeve on the main body to form a space for the working head to be inserted, and the second step is to insert the working head into the operating sleeve. The operation is cumbersome, inconvenient, and inefficient.

[0004] This section provides background information related to the present application which is not necessarily prior art. Summary of the invention

[0005] This application adopts the following technical solutions:

[0006] A polishing machine comprises: a housing; a motor; a main shaft, which is drivingly connected to the motor shaft of the motor, and the main shaft can rotate around a first axis relative to the housing; and a mounting shaft, which is detachably connected to the main shaft; characterized in that the polishing machine also comprises: a limit piece and a locking mechanism, the movement of the mounting shaft drives the locking mechanism, so that the locking mechanism allows the limit piece to move to limit the movement of the mounting shaft along the first axis direction.

[0007] In one embodiment, a limiting groove is formed on the installation shaft, and when the installation shaft is docked with the main shaft from bottom to top, the limiting member falls into the limiting groove to lock the position of the installation shaft.

[0008] In one embodiment, the locking mechanism includes a driving member and an operating sleeve movably sleeved outside the main shaft, and the operating sleeve can drive the driving member to move so that the limiting member is disengaged from the limiting groove.

[0009] In one embodiment, the driving member is a first driving member, and the first driving member rotates to drive the limiting member to disengage from the limiting groove.

[0010] In one embodiment, the driving member is a second driving member, and the second driving member drives the limiting member to move translationally to disengage from the limiting groove.

[0011] In one embodiment, the second driving member is an annular structure sleeved outside the main shaft, an avoidance groove is formed on the inner side of the second driving member, a docking hole is axially provided at the docking end of the main shaft for inserting the mounting shaft, and an accommodating portion is radially penetrated through the docking end of the main shaft, and the limiting member has an avoidance position squeezed into the avoidance groove by the mounting shaft and a locking position stuck in the limit groove.

[0012] In one embodiment, the second driving member includes a first blocking portion located on an upper side of the avoidance groove, a side of the first blocking portion close to the avoidance groove forms an inclined surface, and a diameter of the first blocking portion is smaller than a diameter of the avoidance groove.

[0013] In one embodiment, before the second driving member is driven by the operating sleeve, the first blocking portion abuts against an upper portion of the limiting member.

[0014] In one embodiment, a receiving portion is radially penetrated at the butt end of the main shaft, and the limit member can be movably placed in the receiving portion; the polishing machine also includes a limit sleeve, which is movably mounted outside the main shaft, and the top of the limit sleeve forms a limit portion for limiting the limit member in the receiving portion; wherein the limit member has an initial position limited in the receiving portion, an avoidance position squeezed by the mounting shaft to avoid the limit portion to the upper side of the limit portion, and a locking position stuck between the limit portion and the limit groove.

[0015] In one embodiment, the polishing machine also includes a rotating pressure plate and an elastic member. The rotating pressure plate is located at both ends of its rotating shaft and presses against the top of the limiting member and the top of the limiting sleeve respectively to form a seesaw structure. The elastic member has a movement tendency to reset the limiting part to limit the limiting part in the accommodating part.

[0016] In one embodiment, the first driving member includes a rotating lifting plate, and the operating sleeve can drive the rotating lifting plate to rotate, and the rotating rotating lifting plate drives the rotating pressure plate to rotate in the opposite direction.

[0017] In one embodiment, when the operating sleeve is operated, the mounting shaft can be disengaged from the main shaft.

[0018] In one embodiment, when the operating sleeve is moved in the up-down direction, the mounting shaft can be disengaged from the main shaft.

[0019] In one embodiment, the mounting shaft may be connected to an eccentric body, and a working attachment for performing a polishing operation may be detachably connected to the eccentric body.

[0020] In one embodiment, a reset assembly is further included, wherein a drive hole centered on the first axis is formed in the main shaft, the drive hole is for the installation shaft to be inserted into, the reset assembly is arranged in the drive hole and is located at the upper end of the installation shaft, the reset assembly includes an elastic member and a reset block, the elastic member provides elastic force for the downward movement of the reset block.

[0021] An electric tool comprises: a housing; a motor; a spindle, which is drivingly connected to the motor shaft of the motor, and the spindle can rotate around a first axis relative to the housing; a mounting shaft, which is detachably connected to the spindle; and also comprises: a limit member, which can be located at least in a first position and a second position, and when the mounting shaft is mounted to the spindle, the limit member is located in the first position to limit the movement of the mounting shaft along the first axis; when the limit member is in the second position, the limit member allows the mounting shaft to be separated from the spindle; a locking mechanism, which is used to drive the limit member to move from the second position to the first position; the movement of the mounting shaft drives the locking mechanism so that the locking mechanism allows the limit member to move to the second position.

[0022] In one embodiment, a limiting groove is formed on the installation shaft, and when the installation shaft is docked with the main shaft from bottom to top, the limiting member falls into the limiting groove to lock the position of the installation shaft.

[0023] In one embodiment, the locking mechanism includes a driving member and an operating sleeve movably mounted outside the main shaft, the operating sleeve can drive the driving member to move so that the limiting member disengages from the limiting groove, and the driving member translates and drives the limiting member to disengage from the limiting groove.

[0024] In one embodiment, a reset component is further included, wherein a drive hole centered on the first axis is formed in the main shaft, the drive hole is for the installation shaft to be inserted into, the reset component is arranged in the drive hole and is located at the upper end of the installation shaft, and the reset component is arranged to keep the limit member in the second position when the installation shaft is detached from the main shaft.

[0025] In one embodiment, the reset assembly includes an elastic member and a reset block, and the elastic member provides elastic force for the downward movement of the reset block. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of a polishing machine;

[0027] Figure 2 It is a schematic diagram of the interior of the polishing machine;

[0028] Figure 3 This is a schematic diagram of the polishing machine after removing the casing;

[0029] Figure 4 This is the front view of the polishing machine;

[0030] Figure 5 It is a schematic diagram of the mounting axis of the polishing machine;

[0031] Figure 6 is a first state diagram of a mounting shaft and a main shaft of an embodiment of a polishing machine during docking;

[0032] Figure 7 is a second state diagram of a polishing machine during the docking process between the mounting shaft and the main shaft of an embodiment;

[0033] Figure 8 is a third state diagram of a polishing machine embodiment during the docking process between the mounting shaft and the main shaft;

[0034] Fig. 9 is a state diagram of a polishing machine embodiment during the separation process of the mounting shaft and the main shaft;

[0035] Fig.10 It is a schematic diagram of a first driving member, a limiting sleeve, a rotating pressing plate and a limiting member of an embodiment of a polishing machine;

[0036] Fig.11 It is a schematic diagram of a main shaft, a first driving member, a limiting sleeve, a rotating pressing plate and a limiting member of an embodiment of a polishing machine;

[0037] Fig.12 is a first state diagram of the second embodiment of the polishing machine during the docking process between the mounting shaft and the main shaft;

[0038] Fig.13 is a second state diagram of the installation shaft and the main shaft of the second embodiment of the polishing machine during the docking process;

[0039] Fig.14 is a third state diagram of the second embodiment of the polishing machine during the docking process between the mounting shaft and the main shaft;

[0040] Fig.15 is a state diagram of the second embodiment of the polishing machine during the separation process of the mounting shaft and the main shaft;

[0041] Fig.16 is a schematic diagram of an operating sleeve and a spindle of a second embodiment of a polishing machine;

[0042] Fig.17 is an exploded view of an operating sleeve, a stopper, a support seat and a main shaft of a second embodiment of a polishing machine;

[0043] Fig.18 is a cross-sectional view of a second driving member of a second embodiment of the polishing machine;

[0044] Fig.19It is a schematic diagram of a first structure of a working attachment and a working head;

[0045] Fig. 20 yes Fig.19 An exploded view of the structure shown;

[0046] Fig.21 yes Fig.19 a cross-sectional view of the structure shown;

[0047] Fig. 22 is a schematic diagram of a second structure of a working attachment and a working head;

[0048] Fig.23 yes Fig.23 An exploded view of the structure shown;

[0049] Fig.24 yes Fig.23 a cross-sectional view of the structure shown;

[0050] Fig.25 is a schematic diagram of a third embodiment of a polishing machine;

[0051] Fig.26 is a schematic diagram of the interior of a third embodiment of a polishing machine;

[0052] Fig. 27 is a partial structural sectional view of a third embodiment of the polishing machine;

[0053] Fig.28 yes Fig. 27 A cross-sectional view of the limiting member in the embodiment of the present invention when the limiting member is in the first position;

[0054] Fig.29 yes Fig.28 A magnified image of point A;

[0055] Fig.30 yes Fig. 27 A cross-sectional view of the limiting member in the embodiment of the present invention when the limiting member is in the second position;

[0056] Fig.31 yes Fig.30 A magnified view of point B;

[0057] Fig.32 is a cross-sectional view of a fourth embodiment of the polishing machine when the mounting shaft is inserted into the main shaft and is not locked;

[0058] Fig.33 is a cross-sectional view of a fourth embodiment of the polishing machine in a state where the mounting shaft and the main shaft are locked;

[0059] Fig.34 is a cross-sectional view of the operating sleeve of the fourth embodiment of the polishing machine when being operated;

[0060] Fig.35is a cross-sectional view of the fourth embodiment of the polishing machine when the spindle is ejected by the stop block;

[0061] Fig.36 is an exploded schematic diagram of a partial structure of a fourth embodiment of a polishing machine;

[0062] Fig.37 It is an exploded schematic diagram of the installation of the limit block and the main shaft of the fourth embodiment of the polishing machine. DETAILED DESCRIPTION

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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).

[0068] 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.

[0069] 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.

[0070] The technical solutions involved in this application are applied to electric tools, and embodiments 1 to 4 are described using a polishing machine as an example. It should be noted that all the technical solutions provided in this application are applicable not only to polishing machines, but also to other types of electric tools such as angle grinders, angle drills, electric drills, and screwdrivers.

[0071] like Figures 1 to 4As shown, the present application provides a polishing machine 10, which can replace different working heads 400 and working accessories 900. Different working heads 400 and working accessories 900 can be used to perform different operations on mechanical parts, such as grinding, polishing, etc. In other words, for different types of power tools, the working accessories 900 can be polishing accessories, grinding accessories, cutting accessories, batch heads, etc. In addition to the polishing machine 10, the technical solutions involved in the present application can also be applied to other angular power tools, such as angle grinders, angle drills, and angle wrenches.

[0072] Specifically, the polishing machine 10 includes a housing 100, a motor 200, a spindle 300, a working head 400, a stopper 500 and a locking mechanism 600. The housing 100 is the main installation component. An installation space is formed in the housing 100. The motor 200 and the spindle 300 are both arranged in the installation space. The motor 200 is the power part of the polishing machine 10. The spindle 300 is connected to the motor shaft of the motor 200. Under the drive of the motor 200, the spindle 300 can rotate relative to the housing 100 around the first axis 101. The first axis 101 is Figure 3 The working head 400 includes a mounting shaft 410, which can directly or indirectly mount the working attachment 900 and drive the working attachment 900 to rotate. The mounting shaft 410 is detachably connected to the main shaft 300, and the rotation of the main shaft 300 drives the mounting shaft 410 to rotate. The locking mechanism 600 and the limiter 500 work together to achieve locking or unlocking of the mounting shaft 410 and the main shaft 300.

[0073] like Figure 1 As shown, the housing 100 is a split structure, which includes a first half shell 110 and a second half shell 120 that are spliced ​​together. The housing 100 that is split is easy to manufacture and assemble. The housing 100 is formed with a gripping portion 130 and a mounting portion 140. The gripping portion 130 is used for a user to hold. The user can operate the polishing machine 10 by holding the gripping portion 130 formed on the housing 100. The spindle 300 is installed in the mounting portion 140.

[0074] In some embodiments, the central axis of the mounting portion 140 and the central axis of the grip portion 130 are arranged at an angle, the motor 200 is installed in the mounting space corresponding to the grip portion 130, the spindle 300 is installed in the mounting space corresponding to the mounting portion 140, and the motor shaft of the motor 200 is arranged at an angle to the spindle 300. In a specific embodiment, the motor shaft of the motor 200 is arranged perpendicular to the spindle 300, and when the user holds the polishing machine 10, the motor shaft of the motor 200 extends in the horizontal direction, the first axis 101 extends in the vertical direction, and the mounting portion 140 is formed with a downward opening.

[0075] Continue to refer to Figures 1 to 15As shown, the polishing machine 10 includes a limiter 500, which can limit the movement of the installation shaft 410 along the first axis 101. The limiter 500 can be located at least in a first position and a second position. When the installation shaft 410 is installed to the main shaft 300 and is in a locked state, the limiter 500 is in the first position; when the limiter 500 is in the second position, the limiter 500 allows the installation shaft 410 to move along the first axis 101, thereby separating from the main shaft 300. In the accompanying drawings, Figure 6 , Figure 8 , Fig.12 and Fig.14 The limiting member 500 is in the first position, Figure 7 , Fig. 9 , Fig.11 and Fig.13 The limiting member 500 is in the second position.

[0076] The polishing machine 10 further includes a locking mechanism 600, which is arranged around the main shaft 300. During the docking process between the installation shaft 410 and the main shaft 300, the installation shaft 410 triggers the limiter 500 and causes the limiter 500 to move and directly lock. The locking mechanism 600 provides the limiter 500 with a space for the limiter 500 to move. When the installation shaft 410 is installed on the main shaft 300, the locking mechanism 600 locks the limiter 500, so that the limiter 500 cannot move and the installation shaft 410 is separated from the main shaft 300. In other words, except for directly contacting the installation shaft 410 with the main shaft 300 to trigger the limiter 500 to lock, no additional operation is required to realize the locking function. The locking mechanism 600 can realize a stable connection between the working head 400 and the main shaft 300, so that the working head 400 can rotate synchronously with the main shaft 300. That is to say, the locking mechanism 600 and the limiting member 500 together realize the torque transmission between the mounting shaft 410 and the main shaft 300 .

[0077] Figures 6 to 11 A first embodiment of a polishing machine 10 is disclosed.

[0078] In this embodiment, a limiting groove 411 is formed on the installation shaft 410. When the installation shaft 410 is docked with the main shaft 300 from bottom to top, the limiting member 500 falls into the limiting groove 411 to lock the position of the installation shaft 410. In some embodiments, the limiting member 500 is a limiting ball, and the limiting groove 411 is an arc groove that can limit the sphere of the ball part. The limiting ball can be a steel ball or other metal ball with greater hardness. In some embodiments, the number of limiting members 500 is multiple, and the multiple limiting members 500 are arranged at circumferential intervals around the installation shaft 410. Correspondingly, the number of limiting grooves 411 is multiple, and the multiple limiting grooves 411 are arranged in an arc on the installation shaft 410. The multiple limiting members 500 can be snapped into the multiple limiting grooves 411 one by one.

[0079] In order to dock the installation shaft 410 and the installation stopper 500, a docking hole for inserting the installation shaft 410 is axially provided at the docking end of the main shaft 300, and a receiving portion 301 is radially penetrated through the docking end of the main shaft 300, and the receiving portion 301 is used to install the stopper 500. In some embodiments, the receiving portion 301 is a receiving hole that penetrates the side wall of the main shaft 300 and communicates with the docking hole, and the stopper 500 has a portion protruding into the plug hole 421 to block the initial position of the installation shaft 410, and the stopper 500 can move outward in the receiving hole under the action of an external force, so that the stopper 500 can move to a evasive position to avoid the installation shaft 410.

[0080] It should be noted that in the process of inserting the installation shaft 410 into the docking hole of the main shaft 300 from bottom to top, the installation shaft 410 gradually approaches the limit member 500. After the installation shaft 410 contacts the limit member 500, the limit member 500 can be squeezed to make the limit member 500 move into the accommodating hole, so that the installation shaft 410 can continue to move through the limit member 500. When the limit groove 411 moves to a position opposite to the limit member 500, the limit member 500 can fall into the limit groove 411 and be limited in the limit groove 411, thereby realizing the locking of the installation shaft 410.

[0081] In order to allow the limiting member 500 to fall into the limiting groove 411 to lock the mounting shaft 410, in some embodiments, such as Figures 6 to 11 As shown, the polishing machine 10 also includes a rotating pressing plate 614, a limiting sleeve 800 and an elastic member 810. The limiting sleeve 800 is movably sleeved outside the main shaft 300, and the top of the limiting sleeve 800 forms a limiting portion for limiting the limiting member 500 in the accommodating portion 301. The two ends of the rotating pressing plate 614 located at its rotating shaft are respectively pressed against the top of the limiting member 500 and the top of the limiting sleeve 800 to form a seesaw structure. The elastic member 810 has a movement tendency to reset the limiting portion to limit the limiting member 500 in the accommodating portion 301. In addition, the limiting member 500 has an initial position limited in the accommodating portion 301, a evasive position squeezed by the mounting shaft 410 to avoid the limiting portion to the upper side of the limiting portion, and a locking position stuck between the limiting portion and the limiting groove 411.

[0082] like Figure 6 As shown, the extension length of the accommodating hole in a direction parallel to the first axis 101 is greater than the radial dimension of the limiting member 500 in a direction parallel to the first axis 101, so that the limiting member 500 can move not only in the axial direction of the accommodating hole, but also in the radial direction of the accommodating hole.

[0083] A first shaft hole is provided in the middle of the rotating pressing plate 614. The first shaft passes through the first shaft hole to rotatably connect the rotating pressing plate 614 to the inner wall of the receiving hole. The rotating pressing plate 614 includes a first portion and a second portion located on both sides of the shaft. The rotating pressing plate 614 is located above the stopper 500, and in the plugging direction of the mounting shaft 410, the first portion of the rotating pressing plate 614 abuts against the top of the stopper.

[0084] When the stopper 500 moves in the plugging direction under the pressing action of the installation shaft 410, the stopper 500 can push up the first portion, so that the rotating pressing plate 614 can rotate around the first rotating axis. Figure 7 The counterclockwise rotation shown in the figure is defined as the positive direction of rotation of the rotating pressing plate 614. In some embodiments, the number of the rotating pressing plates 614 is multiple, and the multiple rotating pressing plates 614 are arranged in a one-to-one correspondence with the multiple limiting members 500.

[0085] When the rotating pressing plate 614 rotates forwardly around the first rotating shaft, since the second part of the rotating pressing plate 614 is pressed against the top of the limiting sleeve 800 in the plugging direction of the installation shaft 410, the limiting sleeve 800 can be pressed by the second part to move in the direction away from the plugging direction, so that the limiting part of the limiting sleeve 800 moves downward synchronously. The upward moving limiting member 500 is misaligned with the downward moving limiting part, and the limiting member 500 is squeezed to the top of the limiting part under the squeezing action of the installation shaft 410. And since the downward moving limiting sleeve 800 can synchronously squeeze the elastic member 810, the elastic member 810 is compressed and accumulates elastic potential energy. When the installation shaft 410 moves to the position where its limiting groove 411 is directly opposite to the limiting member 500, the installation shaft 410 releases the squeezing of the limiting member 500, and the elastic body 950 releases the elastic potential energy to reset the limiting sleeve 800 to the initial position. During the reset process, the limiting sleeve 800 can drive the rotating pressing plate 614 to reset, and the limiting member 500 can be Figure 8 The card is shown in a locked position between the limiting portion and the limiting groove 411 .

[0086] In order to unlock the mounting shaft 410 and the spindle 300, so that the working head 400 can be removed from the spindle 300, so as to store or replace other working heads 400, continue to refer to Fig. 9As shown, the locking mechanism 600 also includes a driving member and an operating sleeve 700 movably sleeved outside the main shaft 300. The operating sleeve 700 is provided with an operating driving part 710, which can move the driving member so that the limiting member 500 is separated from the limiting groove 411. In this embodiment, the operating driving part 710 is a part of the operating sleeve 700; in one embodiment, the operating driving part 710 can be separately molded from the operating sleeve 700 and then assembled together for use; in one embodiment, a transmission structure can also be provided between the operating driving part 710 and the operating sleeve 700 to transmit force, which is not limited here.

[0087] In some embodiments, the operating sleeve 700 is directly operated to remove the installation shaft 410 from the main shaft 300. Of course, in other embodiments, the operating sleeve 700 can also be indirectly operated by other components to remove the installation shaft 410 from the main shaft 300.

[0088] In some more specific embodiments, the operating sleeve 700 is moved in the up-down direction to remove the installation shaft 410 from the main shaft 300. Of course, in other embodiments, the operating sleeve 700 can also be rotated to remove the installation shaft 410 from the main shaft 300.

[0089] In some embodiments, the driving member is a first driving member 610, which rotates to drive the limiting member 500 to disengage from the limiting groove 411. The first driving member 610 includes a rotating lifting plate 611, and the operating sleeve 700 can drive the rotating lifting plate 611 to rotate, and the rotating rotating lifting plate 611 drives the rotating pressing plate 614 to rotate in the opposite direction.

[0090] Continue to refer to Fig.10 and Fig.11 As shown, the first driving member 610 also includes two mounting plates 612 and a second rotating shaft 613. A limiting groove is formed on the inner wall surface of the operating sleeve 700. One end of the rotating lifting plate 611 is placed in the limiting groove. The other end of the rotating lifting plate 611 is pressed from top to bottom on a limiting boss 801 formed on the outer wall surface of the limiting sleeve 800. The two mounting plates 612 are installed in the middle of the rotating lifting plate 611 and are located on two opposite sides of the mounting plate 612. A second rotating shaft hole is provided on each mounting plate 612. The second rotating shaft 613 passes through the two second rotating shaft holes and is connected to the housing 100.

[0091] like Fig. 9As shown, when the operating sleeve 700 is moved upward by applying force from bottom to top, the end of the rotating lifting plate 611 that is in contact with the operating sleeve 700 moves upward, so that the rotating lifting plate 611 rotates clockwise, and the other end of the rotating lifting plate 611 presses the limiting boss 801 to move the limiting sleeve 800 downward. During the downward movement of the limiting sleeve 800, the elastic member 810 can be squeezed synchronously, and the limiting portion of the limiting sleeve 800 moves downward synchronously to release the pressure on the limiting member 500. At this time, an external force is applied downward to the installation shaft 410, and the installation shaft 410 can push the limiting member 500 to move into the limiting hole, so that the installation shaft 410 can be smoothly separated from the main shaft 300. After the external force is stopped from being applied to the operating sleeve 700, the elastic member 810 releases the elastic potential energy, so that the limiting member 500, the limiting sleeve 800, the first driving member 610 and the operating sleeve 700 are reset to the initial position.

[0092] In some embodiments, the rotating lifting plate 611 includes a first arc plate 6111 and a second arc plate 6112 connected to each other, the first arc plate 6111 is roughly Z-shaped, and the second arc plate 6112 is roughly semicircular. One end of the first arc plate 6111 is connected to the middle of the second arc plate 6112, and the other end is pressed against the limiting groove. The limiting boss 801 is an annular boss, and the second arc plate 6112 is sleeved outside the limiting sleeve 800 and pressed against the annular boss.

[0093] In some embodiments, the number of the first driving members 610 is two or more, and the multiple first driving members 610 are arranged around the circumference of the limiting sleeve 800, and the multiple second arc plates 6112 are pressed against different positions of the annular boss at the same time.

[0094] Figures 12 to 18 A second embodiment of the polishing machine 10 is disclosed.

[0095] Reference Figures 12 to 18 As shown, in order to enable the limiting member 500 to fall into the limiting groove 411 to lock the installation shaft 410, the driving member is a second driving member 620, which realizes the limiting of the limiting member 500, and the second driving member 620 translates and drives the limiting member 500 to disengage from the limiting groove 411.

[0096] like Fig.18 As shown, the second driving member 620 is an annular structure sleeved outside the main shaft 300, and an avoidance groove 621 is formed on the inner side of the second driving member 620. The limiting member 500 has an initial position limited in the accommodating portion 301, an avoidance position squeezed into the avoidance groove 621 by the mounting shaft 410, and a locking position stuck in the limiting groove 411.

[0097] Specifically, the second driving member 620 includes a first blocking portion 622 located at the upper side of the avoidance groove 621, a second blocking portion located at the lower side of the avoidance groove 621, and a third blocking portion located outside the avoidance groove 621. The first blocking portion 622 forms an inclined surface 623 on one side close to the avoidance groove 621, and the diameter of the first blocking portion 622 is smaller than the diameter of the avoidance groove 621. Specifically, before the second driving member 620 is driven by the operating sleeve 700, the first blocking portion 622 stops at the upper part of the limiting member 500. In the direction of the second driving member 620 from inside to outside, the inclined surface 623 is inclined outward from top to bottom. The limiting member 500 can lift the second driving member 620 by moving on the inclined surface 623, and allows the limiting member 500 to enter the avoidance groove 621.

[0098] Continue to refer to Fig.17 As shown, the polishing machine 10 also includes an elastic reset member 302 sleeved outside the main shaft 300, one end of the elastic reset member 302 is fixedly arranged relative to the main shaft 300, and the other end is in contact with the top surface of the second driving member 620. During the upward movement of the second driving member 620, the elastic reset member 302 is squeezed to accumulate elastic potential energy. When the limit groove 411 on the shaft 410 to be installed moves to a position directly opposite to the limit member 500, the elastic reset member 302 releases the elastic potential energy, so that the limit member 500 moves in the direction of the limit groove 411, and finally the limit member 500 is clamped in the locking position between the limit groove 411 and the first blocking portion 622.

[0099] In order to unlock the mounting shaft 410 and the spindle 300, so that the working head 400 can be removed from the spindle 300, so as to store or replace other working heads 400, continue to refer to Fig.17 As shown, the polishing machine 10 further includes an operating sleeve 700 movably sleeved on the outside of the main shaft 300 , and the operating sleeve 700 can drive the second driving member 620 to move so that the limiting member 500 is disengaged from the limiting groove 411 .

[0100] In the prior art, installing the working head requires at least two steps: the user operates the operating sleeve (such as moving), and the operating sleeve drives the locking mechanism to move, so that the locking mechanism leaves space for the limiter to move. Then the installation shaft is extended to a specific position in the main shaft, and the locking can be achieved after the operating sleeve is released.

[0101] In the polishing machine 10 provided by the present application, the movement of the installation shaft 410 drives the locking mechanism 600 so that the locking mechanism 600 allows the limiter 500 to move from the first position to the second position. When the limiter 500 moves to the limit groove 411, the state change of the locking mechanism 600 locks the limiter 500 in the limit groove 411, thereby locking the installation shaft 410 and the main shaft 300. In other words, the movement of the installation shaft 410 alone can trigger the limiter 500 to move from the first position to the second position. Therefore, the solution disclosed in the present application allows the user to complete the docking and locking of the installation shaft 410 and the main shaft 300 with only one operation. Compared with the two-step operation, the one-step operation to complete the assembly of the working head 400 simplifies the operating steps of installing the working head 400 and improves the efficiency of replacing the working head 400.

[0102] In some specific embodiments, the operating sleeve 700 is directly operated to remove the installation shaft 410 from the main shaft 300. Of course, in other embodiments, the operating sleeve 700 can also be indirectly operated by other components to remove the installation shaft 410 from the main shaft 300.

[0103] In some more specific embodiments, the operating sleeve 700 is moved in the up-down direction to remove the installation shaft 410 from the main shaft 300. Of course, in other embodiments, the operating sleeve 700 can also be rotated to remove the installation shaft 410 from the main shaft 300.

[0104] Specifically, an abutment plate 624 is convexly provided on the outer wall surface of the second driving member 620, and the operating sleeve 700 includes a driving part formed below the abutment plate 624. In some embodiments, as shown in Figure 17, it also includes a support seat 701 for supporting the driving part.

[0105] When it is necessary to unlock the mounting shaft 410, Fig.15 As shown, the operating sleeve 700 is driven to move from bottom to top. During the movement of the operating sleeve 700, the driving portion abuts against the abutment plate 624 and drives the second driving member 620 to move upward, so that the avoidance groove 621 is again arranged opposite to the limiting member 500. At this time, force is applied downward to the installation shaft 410, and the outer wall surface of the installation shaft 410 presses the limiting member 500 so that the limiting member 500 enters the avoidance groove 621, so as to release the locking of the installation shaft 410, so that the installation shaft 410 can be smoothly separated from the main shaft 300.

[0106] like Fig.19 and Fig. 22As shown, the working head 400 further includes an eccentric body 420 connected to the mounting shaft 410, and the polishing machine 10 further includes a working attachment 900. In one embodiment, the working attachment 900 is detachably connected to the eccentric body 420, and the eccentric body 420 is further connected to the mounting shaft 410. In this way, when the mounting shaft 410 rotates, the eccentric body 410 can be rotated eccentrically relative to the mounting shaft 410, that is, the working attachment 900 rotates eccentrically.

[0107] It should be noted that, for any embodiment of the present application, the working head 400 may only include the mounting shaft 410, and the working attachment 900 may be directly mounted on the mounting shaft 410 for use, thereby realizing non-eccentric rotation of the working attachment 900. The eccentric body 420 may also be mounted on the mounting shaft 410, and then the working attachment 900 may be mounted on the eccentric body 420 for use, thereby realizing eccentric rotation of the working attachment 900.

[0108] In order to achieve a detachable connection between the working attachment 900 and the eccentric body 420, in some embodiments, as Figures 19 to 21 As shown, the working attachment 900 includes a chassis 910 and a first adsorption member 930 that are connected to each other, and a second adsorption member 430 is disposed on the eccentric body 420. The first adsorption member 930 and the second adsorption member 430 are adsorbed by the magnetic force of a magnet.

[0109] In some specific embodiments, a mounting cavity is formed on the eccentric body 420, the second adsorption component 430 is placed in the mounting cavity, and the working accessory 900 is inserted into the mounting cavity so that the first adsorption component 930 and the second adsorption component 430 can be adsorbed.

[0110] In some specific embodiments, the chassis 910 includes a shaft portion and a disk portion that are coaxially connected, the size of the shaft portion is smaller than that of the disk portion, and stepped holes are provided in the shaft portion and the disk portion. The first adsorption component 930 includes a first plate portion, a rod portion, and a second plate portion that are connected in sequence, the second plate portion is placed in the disk portion, the rod portion is placed in the shaft portion, the first plate portion abuts against the top plate of the shaft portion, and the shaft portion and the first plate portion extend into the installation cavity, so that the first plate portion is adsorbed with the second adsorption component 430.

[0111] In some embodiments, the first adsorption member 930 and the second adsorption member 430 are magnets with opposite magnetic poles.

[0112] In order to realize the detachable connection between the working attachment 900 and the eccentric body 420, in some parallel embodiments, such as Figure 22 to Figure 24As shown, the working accessory 900 includes an accessory installation shaft 920, and the accessory installation shaft 920 is provided with a mounting hole 921 in the radial direction. The polishing machine 10 also includes an elastic body 950 and a snap-on ball 940 connected to the elastic body 950. The elastic body 950 is placed in the mounting hole 921, and the snap-on ball 940 at least partially protrudes from the mounting hole 921. The eccentric body 420 is provided with a plug-in hole 421, and the inner wall surface of the plug-in hole 421 is inwardly recessed to form a snap-on groove 422. When the accessory installation shaft 920 is inserted into the plug-in hole 421, the snap-on ball 940 can be snapped into the snap-on groove 422 to lock the accessory installation shaft 920.

[0113] In some embodiments, the mounting hole 921 passes through the accessory mounting shaft 920, and the number of the clamping balls 940 is two, and the two clamping balls 940 are respectively connected to the two ends of the elastic body 950. Correspondingly, the number of the clamping slots 422 is two, and the two clamping slots 422 are used to clamp the two clamping balls 940 respectively.

[0114] Figures 25 to 31 A third embodiment of the polishing machine 10 is disclosed.

[0115] The polishing machine 10a includes a main machine 100a, which includes a housing 11, a motor 12, a spindle 300 and a transmission assembly 14. The motor 12 is arranged in the housing 11. The motor 12 has a stator, a rotor and a motor shaft 121. The motor shaft 121 can rotate around a motor axis 103. The spindle 300 can rotate around a first axis 101 relative to the housing 11. The transmission assembly 14 is used to transmit power between the motor shaft 121 and the spindle 300, and output power when the spindle 300 rotates. The motor 12 is arranged in a motor housing 116, which can be a part of the housing 11 or assembled with the housing 11.

[0116] The transmission assembly 14 includes a first transmission wheel 141, a second transmission wheel 142 and a transmission belt 143. The first transmission wheel 141 is arranged on the motor shaft 121, the second transmission wheel 142 is arranged on the main shaft 300, and the transmission belt 143 is connected to the first transmission wheel 141 and the second transmission wheel 142. By adopting the transmission belt 143 for transmission, noise is improved, and a gear box is not required, so there is no risk of oil leakage and the failure rate is reduced. In one embodiment, the transmission belt 143 can be a belt.

[0117] The housing 11 extends substantially in the front-to-back direction. The housing 11 includes a grip portion 111 for a user to hold, a head housing 112 at the front end of the grip portion 111, and a coupling portion 113 at the rear end of the grip portion 111. The head housing 112 is used to accommodate the motor 12 and the spindle 300, and the coupling portion 113 is used to install the battery pack 16, which can supply power to the motor 12 after being connected to the housing 11. The grip portion 111 is substantially perpendicular to the spindle 300.

[0118] The polishing machine 10a further includes an inner housing 15, which is disposed in the head housing 112 of the housing 11, and is used to support the motor 12 and the spindle 300. The motor shaft 121 is disposed in the inner housing 15 and connected to the inner housing 15 through a first bearing 181, and the spindle 300 is disposed in the inner housing 15 and connected to the inner housing 15 through a second bearing 182.

[0119] The polishing machine 10a also includes an operating switch 19 for controlling the start and stop of the motor 12. The operating switch 19 is movably connected to the housing 11, and the operating switch 19 can be moved to at least a first operating position and a second operating position relative to the housing 11. When the operating switch 19 is in the first operating position, the motor 12 rotates at a first speed, and when the operating switch 19 is in the second operating position, the motor 12 rotates at a second speed, and the first speed and the second speed are both greater than zero. In other words, the operating switch 19 can not only start and stop the motor 12, but also adjust the speed of the motor 12. In fact, the operating switch 19 can perform stepless speed regulation on the motor 12. The operating switch 19 is a travel switch that can move relative to the housing 11 and has multiple positions corresponding to multiple motor 12 speeds. In this embodiment, the operating switch 19 is arranged at the front end of the grip 111 for easy operation. The operating switch 19 slides substantially in the up and down direction of the housing 11. When the user holds the grip portion 111 , the four fingers of the user's hand are bent, and the index finger roughly contacts the operation switch 19 , and the user can press the operation switch 19 with the index finger.

[0120] The polishing machine 10a also includes a working head 400, which is detachably connected to the spindle 300. The working head 400 is used to connect the working attachment 900. The detachable manner makes it easy to install, disassemble and replace the working head 400. There can be multiple working heads 400. When one working head 400 is removed, the user can connect another working head 400 to the main machine 100a. Different working heads 400 drive different working attachments 900 to move to achieve different functions. It can be understood that the function can be one or more of sanding, polishing and waxing. When the user needs to perform three processes of sanding, polishing and waxing on the workpiece, the user only needs one polishing machine 10a to install different working heads 400 to complete the three processes, thereby facilitating the user's operation, saving costs and improving work efficiency.

[0121] In this embodiment, the working head 400 includes a mounting shaft 410 and an eccentric body 420. The mounting shaft 410 is detachably connected to the spindle 300. When the mounting shaft 410 is connected to the spindle 300, it can be driven by the spindle 300 to rotate around the first axis 101. The eccentric body 420 is used to connect the working attachment 900. The eccentric body 420 and the mounting shaft 410 form a rotational connection. The eccentric body 420 can rotate around the second axis 102 relative to the mounting shaft 410. The second axis 102 is parallel to the first axis 101 and is spaced apart. The polishing machine 10a also includes a mounting assembly 20, which is used to detachably mount the working head 400 to the spindle 300. The mounting assembly 20 includes an operating member 22, which is used for the user to operate to directly detach the working head 400 from the spindle 300, and the disassembly is quick and convenient. The mounting assembly 20 also includes a stopper 500, which is used to lock or release the working head 400. The limiting member 500 can move between a first position preventing the installation shaft 410 from moving relative to the main shaft 300 and a second position allowing the installation shaft 410 to move relative to the main shaft 300. The operating member 22 is used for the user to operate to disengage the limiting member 500 from the first position.

[0122] The working head 400 also includes an outer gear ring 54, which is connected to the eccentric body 420 and can rotate around the second axis 102 with the eccentric body 420; the polishing machine 10a also includes an inner gear ring 115, which is arranged on the outer periphery of the outer gear ring 54 with the first axis 101 as the axis, and part of the outer gear ring 54 is meshed with the inner gear ring 115.

[0123] When the installation shaft 410 rotates around the first axis 101, the eccentric body 420 and the outer gear ring 54 are driven to revolve around the first axis 101. Since the outer gear ring 54 is meshed with the inner gear ring 115, the outer gear ring 54 will also rotate around the second axis 102 while revolving around the first axis 101. When the polishing machine 10a is started, driven by the installation shaft 410, the eccentric body 420 drives the outer gear ring 54 and the working attachment 900 to revolve around the first axis 101. At the same time, since the outer gear ring 54 is meshed with the inner gear ring 115, the outer gear ring 54, the eccentric body 420 and the working attachment 900 form a whole that rotates around the second axis 102 relative to the installation shaft 410. That is, when the main machine 100a is installed with the working head 400, regardless of whether the working attachment 900 is in contact with the workpiece, the working attachment 900 will also rotate around the second axis 102 while revolving around the first axis 101.

[0124] By meshing the inner gear ring 115 and the outer gear ring 54, the working attachment 900 of the polishing machine 10a makes an eccentric motion relative to the main shaft 300, and the eccentric motion is forced, so that the working attachment 900 swings with a larger amplitude during operation, and the contact area and angle with the workpiece are more diverse, thereby improving the polishing efficiency.

[0125] In this embodiment, a driving hole 131 centered on the first axis 101 is formed in the main shaft 300, and the driving hole 131 is for the installation shaft 410 to be inserted, and the installation shaft 410 includes a rotating shaft that can be inserted into the driving hole 131. A receiving hole 132 for receiving the stopper 500 is formed on the hole wall of the driving hole 131, and the receiving hole 132 penetrates the driving hole 131 along the radial direction of the main shaft 300, and the stopper 500 can move in the receiving hole 132 along the radial direction of the main shaft 300 to a first position and a second position.

[0126] The mounting shaft 410 is provided with a matching structure, which is used to match with the stopper 500. Specifically, the matching structure formed on the mounting shaft 410 is a first groove 511, and the stopper 500 is a sphere that can be partially embedded in the first groove 511. Figures 8 to 10 As shown, when the stopper 500 is in the first position, a portion of the stopper 500 extends into the drive hole 131 and is embedded in the first groove 511. At this time, the stopper 500 limits the sliding of the installation shaft 410 along the direction of the first axis 101, thereby preventing the installation shaft 410 from detaching from the main shaft 300 along the direction of the first axis 101. Similarly, when the stopper 500 is in the first position, the stopper 500 is embedded in the first groove 511, and the stopper 500 also limits the rotation of the installation shaft 410 relative to the main shaft 300, so that the main shaft 300 can output power to the installation shaft 410 through the stopper 500, thereby driving the installation shaft 410 to rotate around the first axis 101. Fig.11 and Fig.12 As shown, when the limit member 500 is located in the second position, the limit member 500 is located outside the driving hole 131, and the limit member 500 is also separated from the first groove 511, so that the limit member 500 no longer restricts the sliding of the installation shaft 410 along the direction of the first axis 101, thereby allowing the installation shaft 410 to separate from the main shaft 300 along the direction of the first axis 101.

[0127] The user can operate the operating member 22 by rotating or sliding. In this embodiment, when the user operates the operating member 22 to slide upward along the first axis 101 relative to the housing 11, the operating member 22 can drive the limiting member 500 to leave the first position, and the user can remove the mounting shaft 410 from the main shaft 300. Part of the operating member 22 is located outside the housing 11 for easy operation by the user, and part of the operating member 22 extends into the housing 11 for easy cooperation with the limiting member 500.

[0128] The housing 11 further includes a guide member 114, at least part of the operating member 22 is sleeved on the outer side of the guide member 114, the guide member 114 is configured to guide the operating member 22 to slide along the first axis 101, and the inner gear ring 115 is disposed at the lower end of the guide member 114. The inner gear ring 115 and the guide member 114 can be separately disposed or integrally formed. In this embodiment, the inner gear ring 115 and the guide member 114 are integrally formed to facilitate processing and production.

[0129] Specifically, the guide member 114 is disposed at the lower end of the head shell 112, and the upper portion of the operating member 22 is sleeved on the outer side of the head shell 112. The guide member 114 is made of metal material, and the guide member 114 guides the operating member 22 to slide along the first axis 101, so that the operating member 22 slides more smoothly. The head shell 112 is made of plastic, and the guide member 114 is a metal member, so as to avoid the problem of the operating member 22 sliding unsmoothly and the deformation or damage of the head shell 112 caused by directly guiding the operating member 22 through the head shell 112. The guide member 114 is fixedly connected to the head shell 112, and can be specifically connected by bolts.

[0130] The operating member 22 is arranged around the first axis 101, and the operating member 22 is a sleeve. The operating member 22 is sleeved on the outside of the guide member 114, so that the operating member 22 can slide relative to the head shell 112 along the direction of the first axis 101. Specifically, the operating member 22 and the guide member 114 both surround the first axis 101, and the guide member 114 protrudes downward from the head shell 112. The outer diameter of the inner gear ring 115 is larger than the outer diameter of the guide member 114 to form a step surface, and the step surface is set to limit the bottom end of the operating member 22.

[0131] The mounting assembly 20 further includes a first biasing element 23, which biases the operating member 22 to generate a biasing force for driving the operating member 22 to return. The first biasing element 23 is a first spring sleeved on the outside of the guide member 114, the first spring is located between the head shell 112 and the operating member 22, one end of the first spring biases the head shell 112, and the other end biases the operating member 22. Specifically, a portion of the first spring is sleeved on the head shell 112, and another portion is sleeved on the outside of the guide member 114. Similarly, a portion of the operating member 22 is sleeved on the head shell 112, and another portion is sleeved on the outside of the guide member 114.

[0132] The mounting assembly 20 further includes a second driving member 620 and a second biasing element 25 . The second driving member 620 is used to contact the limiting member 500 . The second biasing element 25 contacts the second driving member 620 to generate a biasing force driving the limiting member 500 to move toward the first position.

[0133] The second driving member 620 is specifically a sleeve mounted on the main shaft 300, and a driving surface 241 is formed on the second driving member 620. The second biasing element 25 is a second spring mounted on the main shaft 300, and the second spring biases the second driving member 620 to drive the second driving member 620 to move toward the position where the driving surface 241 contacts the stopper 500.

[0134] The operating member 22 is also formed with a contact portion 221 that contacts the second driving member 620, and the contact portion 221 extends into the housing 11. When the operating member 22 slides upward, the contact portion 221 pushes the second driving member 620 to compress the second biasing element 25 upward, and the driving surface 241 no longer contacts the limiting member 500.

[0135] The second driving member 620 is also formed with a second surface 242. When the second driving member 620 moves upward until the second surface 242 is aligned with the limiting member 500, the limiting member 500 is no longer squeezed by the driving surface 241, and the second driving member 620 allows the limiting member 500 to be out of contact with the mounting shaft 410, so that the user can pull out the working head 400.

[0136] The mounting assembly 20 further includes an anti-slip member, which is fixedly disposed on the outer periphery of the operating member 22 to increase the friction when in contact with the user, making it easier for the user to operate. The anti-slip member can be made of rubber material.

[0137] See also Figures 27 to 31 The polishing machine 10a further includes a reset assembly 30, which is disposed in the drive hole 131 of the spindle 300 (see Fig.28 ) and is located at the upper end of the working head 400, and the reset assembly 30 is configured to keep the stopper 500 in the second position when the working head 400 or the installation shaft 410 is separated from the main shaft 300. When the working head 400 needs to be installed, the installation shaft 410 can be directly inserted into the driving hole 131 of the main shaft 300 to improve the assembly efficiency. Since the stopper 500 is kept in the second position, it will not interfere with the insertion of the installation shaft 410 into the driving hole 131.

[0138] The reset assembly 30 includes an elastic member 31 and a reset block 32. The reset block 32 is slidably connected to the driving hole 131. A limiting protrusion 133 is provided on the inner wall of the driving hole 131. The elastic member 31 is provided between the reset block 32 and the limiting protrusion 133. When the working head 400 or the mounting shaft 410 is separated from the main shaft 300, the reset block 32 moves to a position directly opposite to the receiving hole 132 so that the limiting member 500 is kept in the second position. The elastic member 31 provides elastic force for the downward movement of the reset block 32.

[0139] When the installation shaft 410 is inserted into the driving hole 131, the reset block 32 will be squeezed, so that the elastic member 31 is compressed until the first groove 511 on the installation shaft 410 is aligned with the accommodating hole 132, and the limit member 500 is embedded in the first groove 511 under the action of the second driving member 620; when the working head 400 is disassembled, the limit member 500 is disengaged from the first position by sliding the operating member 22, and the working head 400 can move relative to the main shaft 300. As the installation shaft 410 is disengaged from the main shaft 300, the elastic member 31 pushes the reset block 32 to move under the action of the elastic restoring force, so that the reset block 32 moves to a position opposite to the accommodating hole 132, and the reset block 32 abuts against the limit member 500 to keep the limit member 500 in the second position.

[0140] The reset assembly 30 also includes a support column 33, a reset block 32 is connected to the lower end of the support column 33, and a limit protrusion 133 limits the travel of the support column 33. When the mounting shaft 410 is inserted into the driving hole 131, the reset block 32 is squeezed, so that the elastic member 31 is compressed, and the support column 33 slides upward; when the working head 400 is separated from the spindle 300, the support column 33 slides downward to abut against the limit protrusion 133, and the elastic member 31 is still in a compressed state. The setting of the support column 33 can limit the reset block 32, so that the reset block 32 stays at a position directly opposite to the receiving hole 132.

[0141] In addition, when the working head 400 is disassembled, the elastic member 31 recovers its elasticity, and the reset block 32 can apply an ejection force to the working head 400 to separate from the main shaft 300, so that the working head 400 is easier to disassemble.

[0142] Figure 32 to Figure 37 A fourth embodiment of a polishing machine is disclosed.

[0143] The fourth embodiment is consistent with the third embodiment in principle, and the difference lies in the connection method between the reset block 32 and the main shaft 300 . Figure 32 to Figure 37 The components with the same reference numerals as those in the first, second and third embodiments have the same functions and will not be described one by one here. Only the differences between the fourth embodiment and the third embodiment will be described in detail.

[0144] The spindle 300 contains a hollow accommodating chamber, the top of the accommodating chamber is sealed, and the bottom is open. An elastic member 31 is provided between the top of the accommodating chamber and the reset block 32. The reset block 32 is connected to the spindle 300 through a positioning pin 33. The reset block 32 has a through hole 321, and the spindle 300 is provided with a through slot 310. The positioning pin 33 passes through the through hole 321 and the slot 310, so that the two ends of the positioning pin 33 slide in the two slots 310.

[0145] like Figure 32 to Figure 35As shown, when the installation shaft 410 is inserted into the main shaft 300 from bottom to top, the installation shaft 410 pushes the reset block 32 to move upward. When the installation shaft 410 moves up to the limit member 500 and enters the accommodating portion 301, the installation shaft 410 is restricted by the limit member 500 and can no longer move upward, thereby locking the installation shaft 410. At this time, the operating sleeve 700 is moved upward, the sleeve driving portion 710 drives the second driving member 620 to move upward, the elastic member 31 drives the reset block 32 to move downward, and at the same time, the limit member 500 squeezes into the avoidance groove 621, and the main shaft 300 can be smoothly taken out. When disassembling the working head 400, the reset block 32 can apply an ejection force to the working head 400 to separate from the main shaft 300, making the working head 400 easier to disassemble.

[0146] It should be added that, for all technical solutions of the present application, the rotation speed of the spindle 300 is greater than or equal to 500RPM and less than or equal to 8000RPM, that is, the rotation speed of the mounting shaft 410 and the working head 400 is greater than or equal to 500RPM and less than or equal to 8000RPM. In some embodiments, the rotation speed of the power tool is greater than or equal to 2000RPM and less than or equal to 8000RPM. In some embodiments, the rotation speed of the power tool is greater than or equal to 3000RPM and less than or equal to 8000RPM. A series of technical solutions of the present application make it difficult for the mounting shaft 410 to disengage from the spindle 300 when the working accessory rotates at a higher speed, that is, the fit between the mounting shaft 410 and the spindle 300 along the direction of the first axis 101 is more stable. With such a configuration, when the working head 400 rotates at high speed, the vibration generated by the entire power tool is smaller.

[0147] 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 polishing machine comprising: chassis; motor; A main shaft, drivingly connected to a motor shaft of the motor, the main shaft being rotatable relative to the housing about a first axis; A mounting shaft, the mounting shaft being detachably connected to the main shaft; Characterized in that the polishing machine also includes: A limit member and a locking mechanism, wherein the movement of the installation shaft drives the locking mechanism, so that the locking mechanism allows the limit member to move to limit the installation shaft to move along the first axis direction.

2. The polishing machine according to claim 1, characterized in that: A limiting groove is formed on the installation shaft. When the installation shaft is connected to the main shaft from bottom to top, the limiting member falls into the limiting groove to lock the position of the installation shaft.

3. The polishing machine according to claim 2, characterized in that: The locking mechanism includes a driving member and an operating sleeve movably sleeved outside the main shaft, and the operating sleeve can drive the driving member to move so that the limiting member is separated from the limiting groove.

4. The polishing machine according to claim 3, characterized in that: The driving member is a first driving member, and the first driving member rotates to drive the limiting member to separate from the limiting groove.

5. The polishing machine according to claim 3, characterized in that: The driving member is a second driving member, and the second driving member drives the limiting member to move in a translational manner and to separate from the limiting groove.

6. The polishing machine according to claim 5, characterized in that: The second driving member is an annular structure sleeved outside the main shaft, an avoidance groove is formed on the inner side of the second driving member, a docking hole for inserting the mounting shaft is axially provided at the docking end of the main shaft, and an accommodating portion is radially penetrated through the docking end of the main shaft, and the limiting member has an avoidance position squeezed into the avoidance groove by the mounting shaft and a locking position stuck in the limit groove.

7. The polishing machine according to claim 6, characterized in that: The second driving member includes a first blocking portion located on the upper side of the avoidance groove, a side of the first blocking portion close to the avoidance groove forms an inclined surface, and a diameter of the first blocking portion is smaller than a diameter of the avoidance groove.

8. The polishing machine according to claim 7, characterized in that: Before the second driving member is driven by the operating sleeve, the first blocking portion stops at the upper portion of the limiting member.

9. The polishing machine according to claim 4, characterized in that: The butt end of the main shaft is provided with a receiving portion in the radial direction, and the limiting member can be movably placed in the receiving portion; The polishing machine further comprises a limiting sleeve, which is movably sleeved outside the main shaft, and the top of the limiting sleeve forms a limiting portion for limiting the limiting member in the accommodating portion; The limiting member has an initial position limited in the accommodating portion, an avoidance position pressed by the mounting shaft to avoid the limiting portion to the upper side of the limiting portion, and a locking position clamped between the limiting portion and the limiting groove.

10. The polishing machine according to claim 9, characterized in that: The polishing machine also includes a rotating pressure plate and an elastic member. The rotating pressure plate is located at both ends of its rotating shaft and presses against the top of the limiting member and the top of the limiting sleeve to form a seesaw structure. The elastic member has a movement tendency to reset the limiting part to limit the limiting part in the accommodating part.

11. The polishing machine according to claim 10, characterized in that: The first driving member includes a rotating lifting plate, and the operating sleeve can drive the rotating lifting plate to rotate, and the rotating rotating lifting plate drives the rotating pressing plate to rotate in the opposite direction.

12. The polishing machine according to claim 3, characterized in that: When the operating sleeve is operated, the mounting shaft can be disengaged from the main shaft.

13. The polishing machine according to claim 12, characterized in that: When the operating sleeve is moved in the up-down direction, the mounting shaft may be disengaged from the main shaft.

14. The polishing machine according to any one of claims 1 to 13, characterized in that The mounting shaft may be connected to an eccentric body, and a working attachment for performing a polishing operation may be detachably connected to the eccentric body.

15. The polishing machine according to claim 1, characterized in that: It also includes a reset component, a drive hole centered on the first axis is formed in the main shaft, the drive hole is for the installation shaft to be inserted, the reset component is arranged in the drive hole and is located at the upper end of the installation shaft, the reset component includes an elastic member and a reset block, the elastic member provides elastic force for the downward movement of the reset block.

16. An electric tool comprising: chassis; motor; A main shaft, drivingly connected to a motor shaft of the motor, the main shaft being rotatable relative to the housing about a first axis; A mounting shaft detachably connected to the main shaft; It is characterized by further comprising: a limiter, which can be located at least in a first position and a second position; when the mounting shaft is mounted to the main shaft, the limiter is located in the first position to limit the movement of the mounting shaft along the first axis direction; when the limiter is in the second position, the limiter allows the mounting shaft to be separated from the main shaft; A locking mechanism, used for driving the limiting member to move from the second position to the first position; The movement of the mounting shaft drives the locking mechanism so that the locking mechanism allows the stop member to move to the second position.

17. The electric tool according to claim 16, characterized in that: A limiting groove is formed on the installation shaft. When the installation shaft is connected to the main shaft from bottom to top, the limiting member falls into the limiting groove to lock the position of the installation shaft.

18. The electric tool according to claim 17, characterized in that: The locking mechanism includes a driving member and an operating sleeve movably mounted outside the main shaft, the operating sleeve can drive the driving member to move so that the limiting member is disengaged from the limiting groove, and the driving member translates and drives the limiting member to disengage from the limiting groove.

19. The electric tool according to claim 16, characterized in that: It also includes a reset component, a drive hole centered on the first axis is formed in the main shaft, the drive hole is for the installation shaft to be inserted, the reset component is arranged in the drive hole and is located at the upper end of the installation shaft, and the reset component is configured to keep the limit member in the second position when the installation shaft is detached from the main shaft.

20. The electric tool according to claim 19, characterized in that The reset assembly includes an elastic member and a reset block, and the elastic member provides elastic force for the reset block to move downward.

Images