Polishing machine

Abstract

Disclosed in the present application is a polishing machine, comprising: a machine housing, a motor, a spindle, a mounting shaft, a limiting member and a locking mechanism, wherein the spindle is in transmission connection with a motor shaft of the motor, and the spindle can rotate around a first axis relative to the machine housing; and the mounting shaft is detachably connected to the spindle, and the movement of the mounting shaft drives the locking mechanism, such that the locking mechanism allows the limiting member to move so as to limit the movement of the mounting shaft in the direction of the first axis. By means of providing the locking mechanism, the polishing machine makes it possible for a user to complete the butt joint and locking between the mounting shaft and the spindle in a single operation, thus simplifying the operation step of mounting a working head and increasing the efficiency of replacing the working head.

Description

polishing machine

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on September 22, 2023 with application number 202311235069.8, and claims priority to the Chinese patent application filed with the China Patent Office on May 11, 2024 with application number 202410588216.8. The entire contents of the above applications are incorporated by reference into this application. Technical Field

[0002] The present application relates to an electric tool, in particular to a polishing machine. Background Art

[0003] A polishing machine in the related art is an electric tool used to mechanically grind, polish, and wax parts. Polishing machines, also known as grinders, are widely used in many fields such as automobiles and construction.

[0004] A polishing machine consists of a main unit, a work head, and a base plate. The work head is connected to the main unit, and different work heads have different eccentricities. Installing different work heads to the main unit can achieve different working trajectories or motion modes. The base plate is connected to the work head and is used to connect consumables such as polishing paper. The base plate is also replaceable. However, existing work heads require users to perform two steps when installing them to the main unit. The first step is to pull down the operating sleeve on the main unit to create a space for the work head to be inserted, and the second step is to insert the work head into the operating sleeve. This operation is cumbersome, inconvenient, and inefficient.

[0005] This section provides background information related to the present application which is not necessarily prior art.

[0006] Summary of the Invention

[0007] This application adopts the following technical solutions:

[0008] A polishing machine comprises: a housing; a motor; a main shaft, which is in driving connection with 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; wherein the polishing machine also comprises: a limit member and a locking mechanism, the movement of the mounting shaft drives the locking mechanism, so that the locking mechanism allows the limit member to move to limit the mounting shaft to move along the first axis direction.

[0009] In one embodiment, a limiting groove is formed on the installation shaft. 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.

[0010] 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.

[0011] 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.

[0012] In one embodiment, the driving member is a second driving member, and the second driving member drives the limiting member to move in a translational manner to disengage from the limiting groove.

[0013] 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, the docking end of the main shaft is axially provided with a docking hole for inserting the mounting shaft, and the docking end of the main shaft is radially penetrated with an accommodating portion, 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.

[0014] In one embodiment, the second driving member includes a first blocking portion located on the upper side of the avoidance groove, the first blocking portion forms an inclined surface on a side close to the avoidance groove, and the diameter of the first blocking portion is smaller than the diameter of the avoidance groove.

[0015] In one embodiment, before the second driving member is driven by the operating sleeve, the first blocking portion abuts against the upper portion of the limiting member.

[0016] In one embodiment, an accommodating portion is radially penetrated at the butt end of the main shaft, and the limiting member can be movably placed in the accommodating portion; the polishing machine also includes a limiting sleeve, which is movably mounted on the outside of the main shaft, and the top of the limiting sleeve forms a limiting portion that limits the limiting member to the accommodating portion; wherein, the limiting member has an initial position limited in the accommodating portion, an avoidance position squeezed by the mounting shaft 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.

[0017] 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 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.

[0018] In one embodiment, the first driving member includes a rotating lifting plate, 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.

[0019] In one embodiment, when the operating sleeve is operated, the mounting shaft can be disengaged from the main shaft.

[0020] In one embodiment, when the operating sleeve is moved in the up and down directions, the mounting shaft can be disengaged from the main shaft.

[0021] 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.

[0022] 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 mounting shaft to be inserted into, the reset assembly is arranged in the drive hole and is located at the upper end of the mounting 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.

[0023] An electric tool comprises: a housing; a motor; a spindle, which is in transmission connection with 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 further comprises: a limit member, which can be located in at least 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 for driving 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.

[0024] In one embodiment, a limiting groove is formed on the installation shaft. 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.

[0025] 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 drives the limiting member to disengage from the limiting groove in a translational manner.

[0026] 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, the reset assembly is arranged in the drive hole and is located at the upper end of the installation shaft, and the reset assembly is configured to keep the limit member in the second position when the installation shaft is detached from the main shaft.

[0027] 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

[0028] FIG1 is a schematic diagram of a polishing machine;

[0029] FIG2 is a schematic diagram of the interior of the polishing machine;

[0030] FIG3 is a schematic diagram of the polishing machine after the casing is removed;

[0031] FIG4 is a front view of the polishing machine;

[0032] FIG5 is a schematic diagram of the mounting shaft of the polishing machine;

[0033] FIG6 is a diagram of a first state of a polishing machine during the docking process of the mounting shaft and the main shaft according to an embodiment of the polishing machine;

[0034] 7 is a second state diagram of the polishing machine during the docking process of the mounting shaft and the main shaft according to one embodiment;

[0035] FIG8 is a diagram of a third state of the polishing machine during the docking process of the mounting shaft and the main shaft according to an embodiment of the polishing machine;

[0036] 9 is a state diagram of the polishing machine embodiment of the mounting shaft and the main shaft during separation;

[0037] FIG10 is a schematic diagram of a first driving member, a limiting sleeve, a rotating pressure plate and a limiting member of an embodiment of a polishing machine;

[0038] FIG11 is a schematic diagram of a main shaft, a first driving member, a limiting sleeve, a rotating pressure plate and a limiting member of an embodiment of a polishing machine;

[0039] 12 is a first state diagram of the mounting shaft and the main shaft of the polishing machine according to the second embodiment of the present invention;

[0040] 13 is a second state diagram of the polishing machine according to the second embodiment of the mounting shaft and the main shaft during docking;

[0041] 14 is a third state diagram of the polishing machine during the docking process of the mounting shaft and the main shaft of the second embodiment;

[0042] 15 is a state diagram of the polishing machine of the second embodiment of the mounting shaft and the spindle during separation;

[0043] FIG16 is a schematic diagram of an operating sleeve and a spindle of a second embodiment of a polishing machine;

[0044] FIG17 is an exploded view of the operating sleeve, the stopper, the support seat and the main shaft of the second embodiment of the polishing machine;

[0045] FIG18 is a cross-sectional view of a second driving member of a second embodiment of a polishing machine;

[0046] FIG19 is a schematic diagram of a first structure of a working attachment and a working head;

[0047] FIG20 is an exploded view of the structure shown in FIG19;

[0048] FIG21 is a cross-sectional view of the structure shown in FIG19;

[0049] FIG22 is a schematic diagram of a second structure of a working attachment and a working head;

[0050] FIG23 is an exploded view of the structure shown in FIG23;

[0051] FIG24 is a cross-sectional view of the structure shown in FIG23;

[0052] FIG25 is a schematic diagram of a third embodiment of a polishing machine;

[0053] FIG26 is a schematic internal view of a third embodiment of a polishing machine;

[0054] FIG27 is a partial structural sectional view of a third embodiment of the polishing machine;

[0055] FIG28 is a cross-sectional view of the stopper in FIG27 when it is in the first position;

[0056] Figure 29 is an enlarged view of point A in Figure 28;

[0057] FIG30 is a cross-sectional view of the stopper in FIG27 when it is in the second position;

[0058] Figure 31 is an enlarged view of point B in Figure 30;

[0059] 32 is a cross-sectional view of the fourth embodiment of the polishing machine when the mounting shaft is inserted into the spindle and unlocked;

[0060] 33 is a cross-sectional view of a fourth embodiment of the polishing machine in which the mounting shaft and the spindle are locked;

[0061] 34 is a cross-sectional view of the operating sleeve of the fourth embodiment of the polishing machine when being operated;

[0062] FIG35 is a cross-sectional view of the fourth embodiment of the polishing machine when the spindle is ejected by the stopper;

[0063] FIG36 is an exploded schematic diagram of a partial structure of a polishing machine according to a fourth embodiment;

[0064] FIG37 is an exploded schematic diagram of the fourth embodiment of the polishing machine when the limiter and the main shaft are installed. DETAILED DESCRIPTION

[0065] Before any embodiments of the present 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 foregoing drawings.

[0066] In this application, the terms "comprises," "includes," "has," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0067] In this application, the term "and / or" describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in this application generally indicates that the related objects are in an "and / or" relationship.

[0068] In this 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, a direct connection refers to two parts or components being connected together without an intermediary, and an indirect connection refers to two parts or components being connected to at least one intermediary, with the two parts or components being connected via the intermediary. Furthermore, "connect" and "couple" are not limited to physical or mechanical connections or couplings and may include electrical connections or couplings.

[0069] In this application, it will be understood by those skilled 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 tolerance caused by manufacturing, assembly, use, etc. associated with a specific value. 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).

[0070] In this application, it will be understood by those skilled in the art that the function performed by an assembly can be performed by one assembly, multiple assemblies, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one assembly, or a combination of multiple parts.

[0071] 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 the other element "upper" or "lower", but also be indirectly connected to the other 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, below can include directly below, lower left, lower right, lower front and lower back, etc.

[0072] The technical solutions involved in this application are applied to power tools. 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 power tools such as angle grinders, angle drills, electric drills, and screwdrivers.

[0073] As shown in Figures 1 to 4, the present application provides a polishing machine 10 that can be equipped with different work heads 400 and work accessories 900. Using these different work heads 400 and work accessories 900 allows for different operations on mechanical parts, such as grinding and polishing. In other words, the work accessories 900 can be polishing accessories, grinding accessories, cutting accessories, and the like. In addition to the polishing machine 10, the technical solutions of the present application can also be applied to other angular power tools, such as angle grinders, angle drills, and angle wrenches.

[0074] 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 primary mounting component, having an installation space formed therein, within which the motor 200 and the spindle 300 are both disposed. The motor 200 is the power component of the polishing machine 10. The spindle 300 is in transmission connection with the motor shaft of the motor 200. Driven by the motor 200, the spindle 300 can rotate relative to the housing 100 about a first axis 101, which is indicated by the dotted line in FIG3 . The working head 400 includes a mounting shaft 410, which can directly or indirectly mount a working accessory 900 and drive the working accessory 900 to rotate. The mounting shaft 410 is detachably connected to the spindle 300, and the rotation of the spindle 300 drives the mounting shaft 410 to rotate. The locking mechanism 600 and the limiting member 500 work together to achieve locking or unlocking of the mounting shaft 410 and the main shaft 300 .

[0075] As shown in FIG1 , the housing 100 is a split structure, comprising a first half-shell 110 and a second half-shell 120. The split housing 100 is easy to manufacture and assemble. The housing 100 is formed with a grip 130 and a mounting portion 140. The grip 130 is for a user to grip, allowing the user to operate the polisher 10. The spindle 300 is mounted within the mounting portion 140.

[0076] 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 installation space corresponding to the grip portion 130, and the spindle 300 is installed in the installation 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. 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.

[0077] Continuing with reference to Figures 1 to 15 , the polishing machine 10 includes a stopper 500 that can limit the movement of the mounting shaft 410 along the first axis 101. The stopper 500 can be positioned in at least a first position and a second position. When the mounting shaft 410 is mounted to the spindle 300 and locked, the stopper 500 is in the first position. When the stopper 500 is in the second position, the stopper 500 allows the mounting shaft 410 to move along the first axis 101, thereby separating from the spindle 300. In the accompanying drawings, Figures 6, 8, 12, and 14 show the stopper 500 in the first position, and Figures 7, 9, 11, and 13 show the stopper 500 in the second position.

[0078] The polishing machine 10 also includes a locking mechanism 600. The locking mechanism 600 is disposed around the spindle 300. During the docking process between the mounting shaft 410 and the spindle 300, the mounting shaft 410 triggers the stopper 500, causing the stopper 500 to move and directly lock the stopper 500. The locking mechanism 600 provides space for the stopper 500 to move. When the mounting shaft 410 is mounted on the spindle 300, the locking mechanism 600 locks the stopper 500, preventing it from moving and causing the mounting shaft 410 to detach from the spindle 300. In other words, other than directly contacting the mounting shaft 410 with the spindle 300 to trigger the stopper 500 for locking, no additional operation is required to achieve the locking function. The locking mechanism 600 ensures a stable connection between the working head 400 and the spindle 300, allowing the working head 400 to rotate synchronously with the spindle 300. That is, the locking mechanism 600 and the limiting member 500 jointly realize the torque transmission between the mounting shaft 410 and the main shaft 300 .

[0079] 6 to 11 disclose a first embodiment of the polishing machine 10 .

[0080] 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-shaped groove that can limit a portion of the ball. The limiting ball can be a steel ball or other metal ball with greater hardness. In some embodiments, there are multiple limiting members 500, and the multiple limiting members 500 are arranged at intervals around the circumference of the installation shaft 410. Correspondingly, there are multiple limiting grooves 411, and the multiple limiting grooves 411 are arranged in an arc shape on the installation shaft 410. The multiple limiting members 500 can be snapped into the multiple limiting grooves 411 in a one-to-one correspondence.

[0081] To mate with the mounting shaft 410 and install the stopper 500, a docking hole is axially defined at the docking end of the main shaft 300 for insertion of the mounting shaft 410. A receiving portion 301 is radially defined through the docking end of the main shaft 300 for mounting the stopper 500. In some embodiments, the receiving portion 301 is a receiving hole that penetrates the sidewall of the main shaft 300 and communicates with the docking hole. The stopper 500 has a portion that protrudes into the insertion hole 421 to block the initial position of the mounting shaft 410. The stopper 500 can be moved outward within the receiving hole under the action of an external force, allowing the stopper 500 to move to a retracted position away from the mounting shaft 410.

[0082] 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, it can squeeze the limit member 500 so that the limit member 500 moves 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 achieving locking of the installation shaft 410.

[0083] In order to enable the limiting member 500 to fall into the limiting groove 411 to lock the mounting shaft 410, in some embodiments, as shown in Figures 6 to 11, the polishing machine 10 further includes a rotating pressure plate 614, a limiting sleeve 800, and an elastic member 810. The limiting sleeve 800 is movably mounted on the outside of the main shaft 300, and the top of the limiting sleeve 800 forms a limiting portion that limits the limiting member 500 in the accommodating portion 301. The two ends of the rotating pressure plate 614 located on its rotating shaft respectively press 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. Furthermore, the limiting member 500 has an initial position limited in the accommodating portion 301 , an avoidance position where it is squeezed by the mounting shaft 410 to avoid the limiting portion to the upper side of the limiting portion, and a locking position where it is stuck between the limiting portion and the limiting groove 411 .

[0084] As shown in Figure 6, 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.

[0085] A first rotational axis hole is provided in the center of the rotating pressure plate 614. A first rotational axis passes through the first rotational axis hole, rotatably connecting the rotating pressure plate 614 to the inner wall of the receiving hole. The rotating pressure plate 614 includes a first portion and a second portion located on either side of the rotational axis. The rotating pressure plate 614 is located above the stopper 500, and in the insertion direction of the mounting shaft 410, the first portion of the rotating pressure plate 614 abuts the top of the stopper.

[0086] When the stopper 500 moves in the plugging direction under the pressure of the installation shaft 410, the stopper 500 can push up the first portion, thereby causing the rotating pressure plate 614 to rotate around the first rotation axis in the counterclockwise direction shown in Figure 7. The counterclockwise direction is defined as the positive rotation direction of the rotating pressure plate 614. In some embodiments, there are multiple rotating pressure plates 614, and the multiple rotating pressure plates 614 are provided in a one-to-one correspondence with the multiple stoppers 500.

[0087] When the rotating pressure plate 614 rotates forward about the first rotating axis, the second portion of the rotating pressure plate 614 presses against the top of the limiting sleeve 800 in the insertion direction of the installation shaft 410. Therefore, the limiting sleeve 800 is pressed by the second portion to move away from the insertion direction, thereby causing the limiting portion of the limiting sleeve 800 to move downward. The upwardly moving limiting member 500 is misaligned with the downwardly moving limiting portion. Under the compressive action of the installation shaft 410, the limiting member 500 is squeezed above the limiting portion. Furthermore, because the downwardly moving limiting sleeve 800 simultaneously compresses the elastic member 810, the elastic member 810 is compressed and accumulates elastic potential energy. When the installation shaft 410 moves to a position where its limiting groove 411 is directly opposite the limiting member 500, the installation shaft 410 releases its pressure on the limiting member 500, and the elastic member 950 releases its elastic potential energy, causing the limiting sleeve 800 to return to its initial position. During the resetting process, the limiting sleeve 800 can drive the rotating pressure plate 614 to reset, and make the limiting member 500 be stuck in the locking position between the limiting portion and the limiting groove 411 as shown in FIG. 8 .

[0088] In order to unlock the mounting shaft 410 from the main shaft 300, so that the working head 400 can be removed from the main shaft 300 for storage or replacement of other working heads 400, as shown in Figure 9, the locking mechanism 600 also includes a driving member and an operating sleeve 700 that is movably sleeved on the outside of the main shaft 300. The operating sleeve 700 is provided with an operating driving portion 710, which can move the driving member so that the limiting member 500 is disengaged from the limiting groove 411. In this embodiment, the operating driving portion 710 is a part of the operating sleeve 700; in one embodiment, the operating driving portion 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 portion 710 and the operating sleeve 700 to transmit force, which is not limited here.

[0089] 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.

[0090] In some more specific embodiments, the operating sleeve 700 is moved in the up and down directions to remove the mounting shaft 410 from the main shaft 300. Of course, in other embodiments, the operating sleeve 700 can also be rotated to remove the mounting shaft 410 from the main shaft 300.

[0091] In some embodiments, the driving member is a first driving member 610, which rotates to drive the limiting member 500 out of the limiting groove 411. The first driving member 610 includes a rotating lifting plate 611. The operating sleeve 700 can drive the rotating lifting plate 611 to rotate, and the rotating rotating lifting plate 611 drives the rotating pressure plate 614 to rotate in the opposite direction.

[0092] Continuing with reference to Figures 10 and 11, 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, and the other end of the rotating lifting plate 611 is pressed from top to bottom on the 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. Each mounting plate 612 is provided with a second rotating shaft hole. The second rotating shaft 613 passes through the two second rotating shaft holes and is connected to the housing 100.

[0093] As shown in FIG9 , when force is applied from bottom to top to cause the operating sleeve 700 to move upward, the end of the rotating lifting plate 611 that abuts the operating sleeve 700 moves upward, causing the rotating lifting plate 611 to rotate clockwise, and causing the other end of the rotating lifting plate 611 to press against the limiting boss 801, causing the limiting sleeve 800 to move downward. During the downward movement of the limiting sleeve 800, the elastic member 810 can be simultaneously squeezed, and the limiting portion of the limiting sleeve 800 simultaneously moves downward 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, allowing the installation shaft 410 to smoothly disengage from the main shaft 300. After the external force on the operating sleeve 700 stops being applied, the elastic member 810 releases its elastic potential energy, causing the limiting member 500, the limiting sleeve 800, the first driving member 610, and the operating sleeve 700 to return to their initial positions.

[0094] In some embodiments, the rotating lifting plate 611 includes a first curved plate 6111 and a second curved plate 6112 connected to each other. The first curved plate 6111 is roughly Z-shaped, and the second curved plate 6112 is roughly semicircular. One end of the first curved plate 6111 is connected to the middle of the second curved plate 6112, and the other end is pressed against the limiting groove. The limiting boss 801 is an annular boss, and the second curved plate 6112 is mounted on the outside of the limiting sleeve 800 and pressed against the annular boss.

[0095] 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.

[0096] 12 to 18 illustrate a second embodiment of the polishing machine 10 .

[0097] Referring to Figures 12 to 18, 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 limitation 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.

[0098] As shown in Figure 18, the second driving member 620 is an annular structure that is sleeved on the outside of the main shaft 300. 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 installation shaft 410, and a locking position stuck in the limiting groove 411.

[0099] Specifically, the second driving member 620 includes a first blocking portion 622 located on the upper side of the avoidance groove 621, a second blocking portion located on the lower side of the avoidance groove 621, and a third blocking portion located on the outer side of the avoidance groove 621. The first blocking portion 622 forms an inclined surface 623 on the 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. When the second driving member 620 moves from the inside to the outside, the inclined surface 623 tilts 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.

[0100] Continuing with FIG17 , the polishing machine 10 further includes an elastic return member 302 sleeved on the outside of the main shaft 300. One end of the elastic return member 302 is fixed relative to the main shaft 300, and the other end abuts the top surface of the second driving member 620. During the upward movement of the second driving member 620, the elastic return member 302 is squeezed, thereby accumulating elastic potential energy. When the limit groove 411 on the mounting shaft 410 moves to a position directly opposite the limit member 500, the elastic return member 302 releases its elastic potential energy, causing the limit member 500 to move toward the limit groove 411, ultimately causing the limit member 500 to be locked in a locked position between the limit groove 411 and the first blocking portion 622.

[0101] In order to unlock the mounting shaft 410 and the main shaft 300, so that the working head 400 can be removed from the main shaft 300 for storage or replacement of other working heads 400, referring to Figure 17, the polishing machine 10 also includes an operating sleeve 700 that is movably mounted on the outside of the main shaft 300. The operating sleeve 700 can drive the second driving member 620 to move, so that the limiting member 500 disengages from the limiting groove 411.

[0102] In the prior art, installing the work head requires at least two steps: the user operates (e.g., moves) the operating sleeve, which drives the locking mechanism to move, allowing the locking mechanism to leave space for the limiter to move. The installation shaft is then inserted into the spindle to a specific position, and the operating sleeve is released to achieve locking.

[0103] 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.

[0104] 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.

[0105] In some more specific embodiments, the operating sleeve 700 is moved in the up and down directions to remove the mounting shaft 410 from the main shaft 300. Of course, in other embodiments, the operating sleeve 700 can also be rotated to remove the mounting shaft 410 from the main shaft 300.

[0106] Specifically, an abutment plate 624 is protruding from the outer wall surface of the second driving member 620, and the operating sleeve 700 includes a driving portion 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 portion.

[0107] When it is necessary to unlock the installation shaft 410, as shown in FIG15 , the operating sleeve 700 is driven upward. During the movement of the operating sleeve 700, the driving portion contacts the abutment plate 624 and drives the second driving member 620 upward, thereby causing the escape groove 621 to once again face the stopper 500. At this point, downward force is applied to the installation shaft 410, and the outer wall of the installation shaft 410 presses against the stopper 500, forcing the stopper 500 into the escape groove 621, thereby releasing the lock on the installation shaft 410 and allowing it to be smoothly separated from the main shaft 300.

[0108] As shown in Figures 19 and 22, 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 arrangement, 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 can be rotated eccentrically.

[0109] It should be noted that, for any embodiment of the present application, the working head 400 may include only the mounting shaft 410, and the working attachment 900 may be directly mounted on the mounting shaft 410, thereby achieving non-eccentric rotation of the working attachment 900. Alternatively, the eccentric body 420 may be mounted on the mounting shaft 410, and then the working attachment 900 may be mounted on the eccentric body 420, thereby achieving eccentric rotation of the working attachment 900.

[0110] In order to achieve a detachable connection between the working accessory 900 and the eccentric body 420, in some embodiments, as shown in Figures 19 to 21, the working accessory 900 includes a chassis 910 and a first adsorption component 930 that are interconnected, and a second adsorption component 430 is provided on the eccentric body 420. The first adsorption component 930 and the second adsorption component 430 are adsorbed by the magnetic force of a magnet.

[0111] 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.

[0112] In some specific embodiments, the chassis 910 includes a coaxially connected shaft portion and a disk portion, the size of the shaft portion is smaller than the size 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 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 is abutted 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.

[0113] In some embodiments, the first adsorption member 930 and the second adsorption member 430 are magnets with opposite magnetic poles.

[0114] To achieve a detachable connection between the working attachment 900 and the eccentric body 420, in some parallel embodiments, as shown in Figures 22 to 24, the working attachment 900 includes an attachment mounting shaft 920, which is radially provided with a mounting hole 921. 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 attachment mounting 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 attachment mounting shaft 920.

[0115] In some embodiments, the mounting hole 921 passes through the accessory mounting shaft 920, and there are two receiving balls 940, which are respectively connected to the two ends of the elastic body 950. Correspondingly, there are two slots 422, which are respectively used to receive the two receiving balls 940.

[0116] 25 to 31 disclose a third embodiment of the polishing machine 10 .

[0117] The polishing machine 10a includes a main unit 100a, which includes a housing 11, a motor 12, a spindle 300, and a transmission assembly 14. The motor 12 is disposed within the housing 11 and comprises a stator, a rotor, and a motor shaft 121. The motor shaft 121 is rotatable about a motor axis 103. The spindle 300 is rotatable relative to the housing 11 about a first axis 101. The transmission assembly 14 is used to transmit power between the motor shaft 121 and the spindle 300, outputting power when the spindle 300 rotates. The motor 12 is housed within a motor housing 116, which may be part of the housing 11 or assembled therewith.

[0118] 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 mounted on the motor shaft 121, and the second transmission wheel 142 is mounted on the main shaft 300. The transmission belt 143 is connected to the first and second transmission wheels 141, 142. The use of the transmission belt 143 reduces noise, eliminates the need for a gearbox, eliminates the risk of oil leakage, and reduces the risk of failure. In one embodiment, the transmission belt 143 can be a belt.

[0119] The housing 11 extends generally in the front-to-back direction. It includes a grip portion 111 for the user to grasp, a head shell 112 located at the front end of the grip portion 111, and a coupling portion 113 located at the rear end of the grip portion 111. The head shell 112 houses the motor 12 and the spindle 300. The coupling portion 113 is used to mount the battery pack 16, which, when connected to the housing 11, can power the motor 12. The grip portion 111 is generally perpendicular to the spindle 300.

[0120] The polishing machine 10a further includes an inner housing 15, which is disposed within 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 through the inner housing 15 and connected to the inner housing 15 via a first bearing 181. The spindle 300 is disposed through the inner housing 15 and connected to the inner housing 15 via a second bearing 182.

[0121] 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 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. When the operating switch 19 is in the second operating position, the motor 12 rotates at a second speed. Both the first speed and the second speed are 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 speeds of the motor 12. In this embodiment, the operating switch 19 is set at the front end of the grip 111 for easy operation. The operating switch 19 slides basically 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.

[0122] The polishing machine 10a also includes a working head 400, which is detachably connected to the main shaft 300. The working head 400 is used to connect the working attachment 900. The detachable manner makes it easy to install, remove and replace the working head 400. There can be multiple types of working heads 400. When one working head 400 is removed, the user can connect another working head 400 to the main body 100a. Different working heads 400 drive different working attachments 900 to move to achieve different functions. It can be understood that the functions 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.

[0123] In this embodiment, the work head 400 includes a mounting shaft 410 and an eccentric body 420. The mounting shaft 410 is detachably connected to the spindle 300 and can be driven by the spindle 300 to rotate about a first axis 101 when the mounting shaft 410 is connected to the spindle 300. The eccentric body 420 is used to connect to the work accessory 900. The eccentric body 420 is rotatably connected to the mounting shaft 410 and can rotate relative to the mounting shaft 410 about a second axis 102. The second axis 102 is parallel to and spaced apart from the first axis 101. The polishing machine 10a also includes a mounting assembly 20 for detachably mounting the work head 400 to the spindle 300. The mounting assembly 20 includes an operating member 22 for user operation to directly detach the work head 400 from the spindle 300, making disassembly quick and convenient. The mounting assembly 20 also includes a stopper 500 for locking or releasing the work 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 move the limiting member 500 out of the first position.

[0124] The working head 400 also includes an outer ring gear 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 ring gear 115, which is arranged around the outer periphery of the outer ring gear 54 with the first axis 101 as the axis, and part of the outer ring gear 54 is engaged with the inner ring gear 115.

[0125] When the mounting shaft 410 rotates about the first axis 101, it drives the eccentric body 420 and the outer ring gear 54 to orbit around the first axis 101. Because the outer ring gear 54 meshes with the inner ring gear 115, the outer ring gear 54 simultaneously rotates about the second axis 102 while orbiting around the first axis 101. When the polishing machine 10a is started, driven by the mounting shaft 410, the eccentric body 420 drives the outer ring gear 54 and the working attachment 900 to orbit around the first axis 101. Simultaneously, because the outer ring gear 54 meshes with the inner ring gear 115, the outer ring gear 54, the eccentric body 420, and the working attachment 900, as a whole, rotate about the second axis 102 relative to the mounting shaft 410. In other words, when the working head 400 is installed on the main machine 100a, regardless of whether the working attachment 900 is in contact with a workpiece, the working attachment 900 simultaneously rotates about the second axis 102 while orbiting around the first axis 101.

[0126] 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 area and angle of contact with the workpiece are more diverse, thereby improving the polishing efficiency.

[0127] In this embodiment, a drive hole 131 centered on the first axis 101 is formed in the main shaft 300. The drive hole 131 is for inserting the mounting shaft 410, which includes a rotating shaft capable of being inserted into the drive hole 131. A receiving hole 132 for accommodating the stopper 500 is formed in the wall of the drive hole 131. The receiving hole 132 extends radially through the drive hole 131 of the main shaft 300. The stopper 500 can move radially between a first position and a second position within the receiving hole 132.

[0128] A mating structure is formed on the mounting shaft 410, which is used to cooperate with the limiting member 500. Specifically, the mating structure formed on the mounting shaft 410 is a first groove 511, and the limiting member 500 is a sphere that can be partially embedded in the first groove 511. As shown in Figures 8 to 10, when the limiting member 500 is in the first position, a portion of the limiting member 500 extends into the drive hole 131 and is embedded in the first groove 511. At this time, the limiting member 500 limits the sliding of the mounting shaft 410 along the first axis 101, thereby preventing the mounting shaft 410 from separating from the main shaft 300 along the first axis 101. Similarly, when the limiting member 500 is in the first position, the limiting member 500 is embedded in the first groove 511, and the limiting member 500 also limits the rotation of the mounting shaft 410 relative to the main shaft 300, so that the main shaft 300 can output power to the mounting shaft 410 through the limiting member 500, thereby driving the mounting shaft 410 to rotate around the first axis 101. As shown in Figures 11 and 12, when the limit member 500 is in the second position, the limit member 500 is located outside the driving hole 131, and the limit member 500 is also disengaged 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 disengage from the main shaft 300 along the direction of the first axis 101.

[0129] The user can operate the operating member 22 by either rotating or sliding it. In this embodiment, when the user slides the operating member 22 upward relative to the housing 11 along the first axis 101, the operating member 22 can drive the stop member 500 out of the first position, allowing the user to remove the mounting shaft 410 from the main shaft 300. Part of the operating member 22 is located outside the housing 11 for easy user operation, while part of the operating member 22 extends into the housing 11 to facilitate engagement with the stop member 500.

[0130] The housing 11 also includes a guide member 114. At least a portion of the operating member 22 is sleeved on the outside of the guide member 114. The guide member 114 is configured to guide the operating member 22 to slide along the first axis 101. An inner ring gear 115 is disposed at the lower end of the guide member 114. The inner ring gear 115 and the guide member 114 can be separate components or integrally formed. In this embodiment, the inner ring gear 115 and the guide member 114 are integrally formed to facilitate processing and production.

[0131] Specifically, the guide member 114 is provided 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 a metal material, and guides the operating member 22 to slide along the first axis 101, thereby making the operating member 22 slide more smoothly. The head shell 112 is made of plastic, and the guide member 114 is a metal member. This avoids 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.

[0132] The operating member 22 is disposed around the first axis 101. The operating member 22 is a sleeve that fits over the outer side of the guide member 114, allowing the operating member 22 to slide relative to the head housing 112 along the first axis 101. Specifically, the operating member 22 and the guide member 114 both surround the first axis 101, with the guide member 114 protruding downward from the head housing 112. The outer diameter of the inner gear ring 115 is larger than that of the guide member 114, forming a stepped surface that serves to limit the bottom end of the operating member 22.

[0133] The mounting assembly 20 further includes a first biasing element 23, which biases the operating member 22 to generate a biasing force that drives the operating member 22 back into position. The first biasing element 23 is a first spring that is sleeved around 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, while the other end biases the operating member 22. Specifically, a portion of the first spring sleeves around the head shell 112, while another portion sleeves around the outside of the guide member 114. Similarly, a portion of the operating member 22 sleeves around the head shell 112, while another portion sleeves around the outside of the guide member 114.

[0134] The mounting assembly 20 further includes a second driving member 620 and a second biasing element 25 . The second driving member 620 is configured to contact the limiting member 500 . The second biasing element 25 contacts the second driving member 620 to generate a biasing force that drives the limiting member 500 to move toward the first position.

[0135] The second driving member 620 is specifically a sleeve that fits over the spindle 300. A driving surface 241 is formed on the second driving member 620. The second biasing element 25 is a second spring that fits over the spindle 300. The second spring biases the second driving member 620 to move toward a position where the driving surface 241 contacts the stopper 500.

[0136] The operating member 22 further includes a contact portion 221 that contacts the second driving member 620. 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 upward to compress the second biasing element 25. At this time, the driving surface 241 no longer contacts the limiting member 500.

[0137] The second driving member 620 is further 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 pressed by the driving surface 241. At this time, the second driving member 620 allows the limiting member 500 to break away from contact with the mounting shaft 410, so that the user can pull out the working head 400.

[0138] The mounting assembly 20 further includes an anti-slip member, which is fixedly disposed on the periphery of the operating member 22 to increase 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.

[0139] 27 to 31 , the polishing machine 10a further includes a reset assembly 30, which is disposed within the drive hole 131 (see FIG. 28 ) of the spindle 300 and is located at the upper end of the working head 400. The reset assembly 30 is configured to maintain the retaining member 500 in the second position when the working head 400 or the mounting shaft 410 is detached from the spindle 300. When the working head 400 is to be installed, the mounting shaft 410 can be directly inserted into the drive hole 131 of the spindle 300, improving assembly efficiency. Since the retaining member 500 remains in the second position, it does not interfere with the insertion of the mounting shaft 410 into the drive hole 131.

[0140] The reset assembly 30 includes an elastic member 31 and a reset block 32. The reset block 32 is slidably connected to the drive hole 131. A limit protrusion 133 is provided on the inner wall of the drive hole 131. The elastic member 31 is disposed between the reset block 32 and the limit 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 the receiving hole 132, thereby maintaining the limit member 500 in the second position. The elastic member 31 provides elastic force to support the downward movement of the reset block 32.

[0141] When the mounting 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 mounting 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 the sliding operating member 22, and the working head 400 can move relative to the main shaft 300. As the mounting 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 the limit member 500 to keep the limit member 500 in the second position.

[0142] The reset assembly 30 also includes a support column 33, a reset block 32 connected to the lower end of the support column 33, and a limit protrusion 133 that limits the travel of the support column 33. When the mounting shaft 410 is inserted into the drive hole 131, it squeezes the reset block 32, compressing the elastic member 31 and causing the support column 33 to slide upward. When the working head 400 is separated from the spindle 300, the support column 33 slides downward until it abuts the limit protrusion 133. At this time, the elastic member 31 is still in a compressed state. The provision of the support column 33 can limit the reset block 32, so that the reset block 32 stays in a position directly opposite the receiving hole 132.

[0143] 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, making it easier to disassemble the working head 400.

[0144] 32 to 37 disclose a fourth embodiment of the polishing machine.

[0145] The fourth embodiment shares the same principles as the third embodiment, differing in the connection between reset block 32 and spindle 300. Components in Figures 32 through 37 that have the same reference numbers as those in the first, second, and third embodiments have the same functions and will not be described individually. Only the differences between the fourth embodiment and the third embodiment will be described in detail.

[0146] The spindle 300 contains a hollow chamber with a sealed top and an open bottom. An elastic member 31 is positioned between the top of the chamber and the reset block 32. The reset block 32 is connected to the spindle 300 via a locating pin 33. The reset block 32 has a through-hole 321 extending therethrough, and the spindle 300 has a slot 310 extending therethrough. The locating pin 33 passes through the through-hole 321 and the slot 310, allowing the two ends of the locating pin 33 to slide within the two slots 310.

[0147] As shown in Figures 32 to 35, 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 drive portion 710 drives the second drive 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 removed. 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.

[0148] It should be added that, for all technical solutions of the present application, the rotational speed of the spindle 300 is greater than or equal to 500 RPM and less than or equal to 8000 RPM, that is, the rotational speed of the mounting shaft 410 and the working head 400 is greater than or equal to 500 RPM and less than or equal to 8000 RPM. In some embodiments, the rotational speed of the power tool is greater than or equal to 2000 RPM and less than or equal to 8000 RPM. In some embodiments, the rotational speed of the power tool is greater than or equal to 3000 RPM and less than or equal to 8000 RPM. The 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. In other words, the fit between the mounting shaft 410 and the spindle 300 along the first axis 101 is more stable. With this arrangement, when the working head 400 rotates at high speed, the vibration generated by the entire power tool is less.

[0149] The above shows and describes the basic principles, main features and advantages of this application. Those skilled in the art should understand that the above embodiments do not limit this application in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the scope of protection of this 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, wherein: 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, wherein: 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, wherein: 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, wherein: 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, wherein: The second driving member is an annular structure sleeved on the outside of 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.

7. The polishing machine according to claim 6, wherein: 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, wherein: 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, wherein: 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, wherein: 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, wherein: 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, wherein: When the operating sleeve is operated, the mounting shaft can be disengaged from the main shaft.

13. The polishing machine according to claim 12, wherein: 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, wherein: 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 further includes a reset assembly, 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 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.

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, wherein: 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 power tool according to claim 17, wherein: 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 further includes a reset assembly, 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 assembly is arranged in the drive hole and is located at the upper end of the installation shaft, and the reset assembly is configured to keep the limit member in the second position when the installation shaft is detached from the main shaft.

20. The electric power tool according to claim 19, wherein: 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.

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