Polishing head, polishing machine, quick-change head of polishing machine and grinding and polishing head

Abstract

The present invention discloses a polishing head, a polishing machine, a quick-change head of a polishing machine, and a grinding and polishing head. The grinding and polishing heads of the polishing head are coaxially and detachably connected to the quick-change head. The quick-change head includes a clamping disc, a limiting disc, and a connecting body. The clamping disc has a clamping boss, and the limiting disc has a limiting portion. The center of the carrier of the grinding and polishing head has a clamping plate that can be clamped between the clamping boss and the limiting portion. The thickness of the clamping plate is equivalent to the distance between the connecting disc and the limiting disc, and a perforation for the clamping disc window is formed at its center. The perforation includes a circular hole portion and an arc-shaped hole portion located on the side of the circular hole portion. A blocking body for restricting relative rotation between the quick-change head and the grinding and polishing head is formed on the end face of the clamping plate facing away from the quick-change head. The blocking body and the arc-shaped hole portion are misaligned and distributed on the side of the circular hole portion and maintain a gap. This solution only needs to align and insert the perforations on the quick-change head and the grinding and polishing head and then simply rotate to achieve their quick connection and disassembly, and the disassembly and assembly efficiency is higher than that of screw or bolt connection.

Description

Technical Field

[0001] The invention relates to the field of electric tools, in particular to a polishing machine head, a polishing machine, a quick-change head of a polishing machine and a grinding and polishing head. Background Art

[0002] Polishing machine is also called grinding machine, which is often used for mechanical grinding, polishing and waxing. Its working principle is: the motor drives the sponge or wool grinding and polishing head installed on the polishing machine to rotate at high speed, and the grinding and polishing head and the polishing agent work together and rub against the surface to be polished, thereby achieving the purpose of removing paint surface pollution, oxide layer and shallow marks.

[0003] According to different processing requirements, the polishing head needs to be replaced frequently. In conventional structures, the polishing head is connected to the output shaft by threads or bolts to achieve replacement. However, this method still requires a certain amount of time for the screwing operation, and the convenience of replacement is not high. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems existing in the prior art and to provide a polishing machine head, a polishing machine, a quick-change head of a polishing machine and a grinding and polishing head.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] The polishing machine head comprises a shell, a transmission mechanism and a grinding and polishing head, the grinding and polishing head is coaxially and detachably connected to a quick-change head, the quick-change head is connected to the transmission mechanism, the quick-change head comprises a coaxial clamping disk, a limiting disk and a connecting body connected therebetween, the clamping disk has at least one clamping boss protruding to the outside of the connecting body, the limiting disk has a limiting portion protruding to the outside of the connecting body, the center of the carrier of the grinding and polishing head comprises a clamping plate that can be clamped between the clamping boss and the limiting portion, the thickness of the clamping plate is equivalent to the spacing between the connecting disk and the limiting disk, and a through hole matching the side profile of the clamping disk is formed at the center of the clamping plate, the through hole comprises a circular hole portion and an arc-shaped hole portion located on the side of the circular hole portion, a blocking body matching the clamping boss to limit the relative rotation between the quick-change head and the grinding and polishing head is formed on the end face of the clamping plate facing away from the quick-change head, the blocking body and the arc-shaped hole portion are staggered and distributed on the side of the circular hole portion to maintain a gap.

[0007] Preferably, in the polishing machine head, the quick-change head has an I-shaped center hole and is connected to the transmission mechanism by bolts.

[0008] Preferably, in the polishing machine head, a clamping groove is formed on the end face of the clamping boss facing the limiting plate, and a limiting ridge is formed on the end face of the clamping plate facing away from the quick-change head. When the clamping boss is in abutment with the blocking body, the limiting ridge is located in the clamping groove.

[0009] Preferably, in the polishing head, there are two clamping bosses which are opposite in position. The side profile of the limiting part is circular and the diameter of the circle is equivalent to the distance between the outer ends of the two clamping bosses. There are two blocking bodies, and each blocking body is adjacent to an arc-shaped hole.

[0010] Preferably, in the polishing head, a steering indication mark is formed on the carrier of the polishing and grinding head.

[0011] Preferably, in the polishing head, the transmission mechanism includes an output shaft which is coaxial with the quick connector and detachably connected. The output shaft can rotate self - and move along its axis. Its outer end extends out of the housing, and its inner end is coaxial and torsion - transmittingly connected to a torsion - transmitting part with a fixed position. The output shaft is inserted into the torsion - transmitting part and the two are kept in abutment through an elastic mechanism. The torsion - transmitting part is rotatably arranged in the housing.

[0012] Preferably, in the polishing head, the output shaft is movably and rotatably inserted into a bushing. The bushing is fixed in the housing or a cover body. At least two convex parts are formed on the side wall of the output shaft, and the gap between two adjacent convex parts forms a rotation - stopping groove. A rotation - stopping convex block corresponding to the rotation - stopping groove is formed on the inner wall of the end plate of the housing or the cover body.

[0013] Preferably, in the polishing head, a connector is arranged on the housing, and a spline connector of the transmission mechanism is coaxially and rotatably arranged in the connector.

[0014] The quick - change head of the polishing machine includes a coaxial clamping disk, a limiting disk and a connecting body connecting between them. The clamping disk has at least one clamping boss protruding to the outside of the connecting body. The side profile of the limiting disk is circular and its radius is equivalent to the distance from the arc top of the side of the clamping boss to the axis of the quick - change head.

[0015] The polishing and grinding head includes a carrier and polishing abrasives which are coaxially connected. The carrier is detachably connected to the quick - change head of the above - mentioned polishing machine. A clamping plate is arranged at the center of the carrier. The thickness of the clamping plate is equivalent to the distance between the connecting disk and the limiting disk and a through - hole is formed in the middle of it. The through - hole includes a round - hole part and an arc - shaped hole part. A blocking body is formed on the end face of the clamping plate facing away from the quick - change head. The blocking body and the arc - shaped hole part are misaligned and distributed on the side of the round - hole part and kept with a gap.

[0016] The polishing machine includes any one of the above - mentioned polishing heads.

[0017] The advantages of the technical solution of the present invention are mainly reflected in:

[0018] In this solution, by designing a quick-change head and a grinding and polishing head with a rotary snap connection, only by aligning the perforations on the quick-change head and the grinding and polishing head and simply rotating them after insertion can the quick connection and disassembly of the quick-change head and the grinding and polishing head be achieved. The disassembly and assembly efficiency is higher than that of conventional threaded or bolted connections.

[0019] The quick-change head of this solution is screwed to the transmission mechanism, which is convenient for assembly and replacement.

[0020] In this solution, matching limiting ridges and clamping grooves are formed on the quick-change head and the grinding disc, which can limit the relative rotation of them to a certain extent after the connection between the quick-change head and the grinding disc to prevent them from becoming unhooked.

[0021] This solution sets two clamping bosses, which can improve the connection stability and make the quick-change head and the grinding disc bear force evenly. Combined with the steering indication mark, the corresponding opening and closing rotation directions can be intuitively determined, improving the convenience of operation.

[0022] Each part of the transmission structure of this solution has stable support and is easy to assemble. At the same time, it can be effectively assembled with the housing after the external assembly is completed, which is convenient for separate assembly to improve efficiency. By forming matching grooves and protrusions on the side wall of the output shaft and the inner wall of the cover or housing, combined with the output shaft that can move axially, when disassembling the grinding and polishing head, the output shaft can be pulled outwards to make the anti-rotation protrusion embed into the anti-rotation groove to limit the self-rotation of the output shaft, and then the grinding and polishing head can be rotated relative to the quick-change head to achieve disassembly conveniently.

[0023] For the power tool main body of this solution, by setting matching arc-shaped barrel holes and limiting hooks on the rotary ring and the fixed block, the rotary ring and the fixed block can be effectively assembled into a whole, which is convenient for installation and conducive to ensuring the structural stability.

[0024] The limiting hook of this solution is set on the limiting protrusion, which can reduce the length of the limiting hook and effectively reduce the occupied space of the limiting hook to avoid interference with other structures on the fixed block.

[0025] In this solution, an arc-shaped groove for accommodating the return spring is formed on the rotary ring, and a limiting protrusion embedded in the arc-shaped groove is formed on the fixed block, which can effectively compress the return spring to make the return spring play a role. Through the shape design of the arc-shaped groove, the limiting spring can be conveniently installed into the arc-shaped groove, which is convenient for assembly operation. Combined with the shielding part on the fixed block, the return spring can be effectively restricted to prevent the return spring from exiting the arc-shaped groove. The integrity and stability of the structure are better, and it is easier to disassemble and assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a partial exploded view of the polishing head of the present invention (part of one side of the housing is hidden in the figure);

[0027] Figure 2 is the first - perspective three - dimensional view of the quick - change head of the present invention;

[0028] Figure 3 is the cross - sectional view of the quick - change head of the present invention;

[0029] Figure 4 is the three - dimensional view of the carrier of the polishing head of the present invention;

[0030] Figure 5 is the end view of the carrier of the polishing head of the present invention facing the polishing abrasive;

[0031] Figure 6 is the second - perspective three - dimensional view of the quick - change head of the present invention;

[0032] Figure 7 is the cross - sectional view of the polishing machine head of the present invention (part of the outer shell on one side is hidden in the figure);

[0033] Figure 8 is the three - dimensional view of the disassembled state of the output shaft and the planet carrier in the transmission mechanism of the present invention;

[0034] Figure 9 is the three - dimensional view of the cover body in the transmission mechanism of the present invention;

[0035] Figure 10 is the cross - sectional view of the disassembled state of the polishing machine head and the driving main machine of the polishing machine of the present invention;

[0036] Figure 11 is the three - dimensional view of the driving main machine of the present invention, with the left - hand half of the main machine housing hidden in the figure;

[0037] Figure 12 is the three - dimensional view of the knob and the fixing block connected as a whole of the present invention;

[0038] Figure 13 is the three - dimensional view of the knob of the present invention;

[0039] Figure 14 is the schematic diagram of the positional relationship between the blocking block and the fixing block of the present invention;

[0040] Figure 15 is the three - dimensional view of the fixing block of the present invention;

[0041] Figure 16 is the cross - sectional view of the driving main machine of the present invention, with the left - hand half of the main machine housing hidden in the figure. Detailed implementation manners

[0042] The objectives, advantages, and features of the present invention will be illustrated and explained through the following non-limiting description of preferred embodiments. These embodiments are merely typical examples of applying the technical solutions of the present invention, and any technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection required by the present invention.

[0043] In the description of the solution, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of description and simplification, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. And in the description of the solution, with the operator as a reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0044] Embodiment 1

[0045] The following will elaborate on the polishing head disclosed by the present invention in conjunction with the drawings. As shown in the attached Figure 1 and the attached Figure 7 figures, it includes a housing 100, a transmission mechanism 200, a polishing head 300, and a quick-change head 400. The housing 100 is assembled from two parts 110 and is approximately cylindrical. One end thereof has a through-hole for the output shaft of the transmission mechanism 200 to extend to the outside of the housing and connect to the quick-change head 400, and the other end has an opening for facilitating the installation of the transmission mechanism and connecting to an external driving host.

[0046] As shown in the attached Figure 1 figure, the polishing head 300 includes a carrier 310 and polishing abrasives 320 coaxially fixed on the carrier 310. The carrier 310 of the polishing head 300 is coaxially and detachably connected to the quick-change head 400.

[0047] As shown in the attached Figure 2 and the attached Figure 3 figures, the quick-change head 400 includes a coaxial clamping disc 410, a limiting disc 420, and a connecting body 430 connected between them. The clamping disc 410 has at least one clamping boss 411 protruding to the outside of the connecting body 430, and the limiting disc 420 has a limiting portion 421 protruding to the outside of the connecting body 430.

[0048] As shown in the attached Figure 4 and the attached Figure 5As shown, the center of the carrier 210 of the grinding and polishing head 300 has a clamping plate 311 that can be clamped between the clamping boss 411 and the limiting portion 421. The thickness of the clamping plate 311 is equivalent to the spacing L between the connecting disk 410 and the limiting disk 420, and a through hole 312 matching the contour of the side 413 of the clamping disk 410 is formed at the center thereof. The through hole 312 includes a circular hole portion 3121 and an arc-shaped hole portion 3122 located on the side of the circular hole portion. A blocking body 314 matching the clamping boss to limit the relative rotation between the quick-change head and the grinding and polishing head is formed on the end face 313 of the clamping plate 311 facing away from the quick-change head 400. The blocking body 314 and the arc-shaped hole portion 3122 are staggered and distributed on the side of the circular hole portion and a gap is maintained between the two.

[0049] Therefore, when the grinding and polishing head 300 needs to be connected with the quick-change head 400, the clamping boss 411 is made to face the arc-shaped hole 3122, and the quick-change head passes through the clamping plate 311 until the clamping plate 311 abuts or is close to the limiting portion 421 of the limiting disk 410, and the clamping plate 311 is relative to the gap between the clamping disk 410 and the limiting disk 420, and then the grinding and polishing head and the quick-change head are made to rotate relative to each other until the clamping boss 411 abuts against the blocking body 314. At this time, the clamping plate is limited between the limiting portion and the clamping boss 411, so that the grinding and polishing head and the quick-change head are quickly connected. When disassembly is required, the grinding and polishing head and the quick-change head can be separated by rotating the clamping boss 411 until it faces the arc-shaped hole.

[0050] As attached Figure 2 , Attachment Figure 3 As shown, the clamping disk 410 includes a ring body 412, the center hole of the ring body 412 is a countersunk hole, and two arc-shaped clamping bosses 411 are formed on the opposite sides of the ring body 412. Of course, the number of the clamping bosses can also be designed to be other values, and their width can also be made smaller. The connecting body 430 is a tubular body with a diameter less than or equal to the ring body 412, and the limiting disk 420 is a ring. The outer diameter of the ring is equivalent to the spacing W between the side arc tops of the two clamping bosses 411, and the center hole of the limiting disk 420 is a countersunk hole, and the inlet section of the countersunk hole is a non-circular hole. At the same time, the connecting body 430 has a through hole connecting the center holes of the clamping disk 410 and the limiting disk 420, so that an I-shaped center hole 440 is formed on the quick-change head, which is convenient for connecting the quick-change head 400 with the output shaft of the transmission mechanism through screws or bolts.

[0051] As attached Figure 4 , Attachment Figure 5As shown, correspondingly, the diameter of the clamping plate 311 of the grinding and polishing head 300 is equivalent to the spacing W. At the same time, the aperture of the circular hole part 3121 of the perforation 312 of the clamping plate is equivalent to the outer diameter of the toroidal body 412. Two arc-shaped hole parts 3122 matching the two arc-shaped bodies are formed on the side of the circular hole part 3121. Correspondingly, the blocking bodies 3124 are also two and are triangular bodies, and each blocking body 3124 is adjacent to an arc-shaped hole part 3122.

[0052] During the rotation of the quick-change head 400, in order to ensure that the clamping boss 411 does not move easily after abutting against the blocking body 314, as shown in the appendix Figure 6 As shown, a clamping groove 4112 is formed on the end face 4111 of the clamping boss 411 facing the limiting disc 420, as shown in the appendix Figure 5 As shown, a limiting convex rib 316 is formed on the end face 313 of the clamping plate 311 facing away from the quick-change head 400. In the state where the clamping boss 411 abuts against the blocking body 314, the limiting convex rib 316 is located in the clamping groove 4112, so as to be able to play a certain limiting role on the clamping boss 411.

[0053] As shown in the appendix Figure 4 As shown, the outer contour of the carrier 310 is funnel-shaped, and a steering indication mark 317 is provided on the arc surface of the carrier 310. The steering indication mark 317 includes a steering arrow and an illustration of the locked / unlocked state corresponding to the steering arrow.

[0054] The transmission mechanism 200 is used to connect an external motor and transmit the torque of the motor to the grinding and polishing head 300 to drive the grinding and polishing head 300 to rotate self-rotationally to achieve grinding and polishing. It can adopt various known transmission structures, such as a gear transmission structure, etc.

[0055] As shown in the appendix Figure 7 As shown, for the convenience of assembly, the transmission mechanism 200 is clamped and fixed in a clamping groove formed on the inner wall of the housing 100. The transmission mechanism 200 includes an output shaft 210 that is coaxial with the quick-connect head and is detachably connected. A screw hole extending backward from its front end is formed in the center of the output shaft 210. The output shaft 210 is connected to the quick-connect head 400 through a bolt 2600. The output shaft 210 is rotatably arranged in a housing 220 and can move along its axis. Its outer end extends to the outside of the housing 100. A bushing 230 coaxial with the output shaft 210 is fixed in the housing 220. The output shaft 210 is slidably connected to the bushing 230 and can rotate relative to the bushing 230. Of course, in another embodiment, the bushing 230 can also be directly fixed in the housing.

[0056] As shown in the appendix Figure 7 As shown in the appendix Figure 8As shown, the inner end of the output shaft 210 is coaxially and torsionally connected to a torsion transmission member with a fixed position, and the torsion transmission member is inserted into the output shaft 210. The output shaft 210 is connected to the torsion transmission member through an elastic mechanism 260. In such a structure, it is easier to use a bushing to install the output shaft 210. At this time, the output shaft 210 can move axially relative to the torsion transmission member by a certain stroke. On the one hand, this facilitates the installation of parts. On the other hand, through certain structural designs, it can be avoided that the output shaft 210 rotates when the polishing head is replaced.

[0057] As shown in the Figure 8 accompanying drawings, at least two convex portions 214 are formed on the side wall of the output shaft 210. The gap between the two convex portions 214 forms a rotation prevention groove 213. Preferably, there are four convex portions 214 evenly distributed in the circumferential direction, and they form four rotation prevention grooves 213. Correspondingly, as shown in the Figure 9 accompanying drawings, rotation prevention protrusions 222 corresponding to each rotation prevention groove 213 are formed on the inner wall of the end plate 221 of the housing 220. Under normal conditions, the elastic mechanism 260 keeps a certain gap between the rotation prevention protrusions 222 and the rotation prevention grooves 213, so as not to affect the rotation of the output shaft 210. When the polishing head 300 needs to be replaced, the polishing head 300 is pulled in the direction away from the quick change head 400, so that the output shaft 210 moves towards the housing 220, and the rotation prevention protrusions 222 are respectively inserted into a rotation prevention groove 213. At this time, when the polishing head 300 is rotated, the output shaft 210 and the quick change head 400 cannot follow the polishing head 300 to rotate, so that the polishing head 300 can be conveniently replaced.

[0058] The torsion transmission member is used to transmit the torque of the motor to the pivot 210, and at the same time it is used to limit the position of the inner end of the output shaft. The torsion transmission member can be a rotating shaft coaxial with the output shaft 210, which is rotatably and fixedly arranged in the housing 100 through bearings. At this time, the rotating shaft can be directly connected to a reduction motor to drive the output shaft 210. Or, the torsion transmission member is the output shaft of a gearbox. At this time, the output end of the gearbox can be connected to an ordinary motor.

[0059] As shown in the Figure 7 and Figure 8 accompanying drawings, the torsion transmission member is a planetary carrier 240. A slot is formed on the inner end face of the output shaft 210. The slot includes a large semi-circular groove 211 and a rectangular groove 212. The forward extension 241 of the planetary carrier 240 is inserted into the large semi-circular groove, and a rectangular block 250 is arranged in the rectangular groove, so that the output shaft 210 can move axially relative to the planetary carrier 240 by a certain stroke; of course, it is also possible to form a slot on the planetary carrier, and the output shaft 210 is inserted into the planetary carrier.

[0060] As shown in the appended Figure 7 and appended Figure 8 figures, the planet carrier 240 is rotatably arranged on a fixed sleeve 280 through a bearing 270. The fixed sleeve 280 is butted against the open end of the cover body 210 and fixed by bolts. In order to better support the forward extension 241 of the planet carrier 240 and reduce the stress on the bearing, the forward extension 241 is rotatably arranged in a bushing 290. The bushing 290 can be directly fixed in the cover body or fixed in a fixing ring 2100, and the fixing ring 2100 is connected between the cover body 2100 and the fixed sleeve 280.

[0061] As shown in the appended Figure 7 and appended Figure 8 figures, at least one planet gear 2200 is rotatably arranged on the planet carrier 240. There are two planet gears 2200 arranged oppositely, which mesh with a gear ring 2300 fixed in the fixed sleeve 280 and a gear part of a gear shaft 2400, thus forming a planetary transmission mechanism. The specific structure of the gear shaft 2400 is a known structure and is not an innovation of this solution, so it will not be elaborated here. The gear part of the gear shaft 2400 extends into the central hole of the planet carrier 240, and the part extending outside the central hole of the planet carrier 240 is coaxially inserted into a jack of a spline connector 2500, and they are torque-transmittingly connected.

[0062] The spline connector 2500 is coaxially and rotatably arranged in a connector head 500 coaxially connected to the fixed sleeve 280. A bushing 2700 is fixed in the connector head 500, and the spline connector 2500 is fixed in the connector head 500 through a shaft retaining ring 2800. Of course, the connector head 500 can also be directly connected to the housing. Of course, the spline connector 2500 can also be directly rotatably arranged in the fixed sleeve 280. At this time, the fixed sleeve 280 has a part for installing the above-mentioned bushing 2700.

[0063] The connector head 500 is located outside the end of the housing 100 and is used to connect an external driving host with a motor to drive the quick-change head. As shown in the appended Figure 10 figures, the connector head 500 includes a square socket part 510 and a limiting part 520. The outer contour of the socket part 510 is preferably a square, and the center of the socket part 510 is a square hole. At least one side wall of the socket part 510 is formed with a boss 511 extending a certain distance from its outer end to its inner end. Preferably, bosses 511 are formed on all four side walls; a clamping groove 530 is formed between the boss 511 and the outer end face 521 of the limiting part 520.

[0064] As shown in the appendedFigure 6 As shown in the figure, the elastic mechanism 260 includes a blocking ring 261 sleeved on the outer periphery of the output shaft 210. The blocking ring 261 abuts against the abutting surface 211 on the output shaft 210 (the end surfaces of the four anti-rotation bumps facing the quick-change head). A spring 262 sleeved on the outer periphery of the output shaft 210 is arranged between the blocking ring 261 and the end plate 221 of the housing 220. The spring 262 drives the blocking ring 261 to apply pressure to the output shaft 210 so that it abuts against the planet carrier 240. Of course, the output shaft 210 and the planet carrier 240 may not be in an abutting state; and the moving stroke of the output shaft 210 is less than the depth of the rectangular parallelepiped groove. Of course, if there is no housing 220, the spring is connected (abutted or fixed) to the inner wall of the end plate of the outer shell. At this time, the anti-rotation bumps can also be directly formed on the inner wall of the end plate of the outer shell.

[0065] When in use, connect to an external driving host through the connector 500. The motor in the driving host drives the spline connector through the spline inserted in the spline connector, and then drives the gear shaft. The gear shaft drives the two planet gears to drive the planet carrier to rotate. The rotation of the planet carrier drives the output shaft to rotate self, and the output shaft drives the quick-change head to rotate self, thereby driving the polishing head to rotate self.

[0066] Embodiment 2

[0067] This solution also discloses a polishing machine, as shown in the appendix Figure 10 As shown in the figure, it includes the above-mentioned polishing head 10 and a motor. The motor can be directly integrated in the outer shell or can be arranged in an external driving host 22.

[0068] The structure of the driving host can adopt various known structures, such as the structures disclosed in existing patents with application numbers 202021068376.3, 202010315589.X, 202021068376.3, etc., which will not be elaborated here. It can also adopt the following structure:

[0069] As shown in the appendix Figure 10 、appendix Figure 11As shown, the driving host 22 includes a host housing 222, which is used to provide installation space and the holding space required for manual operation, etc. The shape of the host housing 222 can refer to the appearance of various existing hand-held tools, for example, it can be in the shape of a connecting piece of a gun-shaped electric drill or a connecting piece of a pen-shaped electric drill, etc. Taking the gun-shaped electric drill as an example, the host housing 222 can be a structure with a cavity inside and a socket at one end, which is composed of two symmetrical halves (only the structure of the left half is shown in the figure), and includes a holding part for human hand holding and a mounting part, and an approximately circular inner cavity is formed at the mounting part, and the front end of the mounting part forms the socket 2221. When it is necessary to assemble the cleaning machine head and the driving host 22 into one, the connector is inserted from the socket 2221.

[0070] As attached Figure 10 As shown, the motor 221 is arranged in the main housing 222, and the rotating shaft of the motor 221 faces the socket 2221 and is coaxial with the socket 2221. The main housing 222 is also provided with a control panel, a battery and other structures possessed by conventional power tools. The main housing 222 is also provided with a start button, a steering switch key and other structures possessed by conventional power tools. This is a known technology and will not be elaborated on.

[0071] As attached Figure 11 As shown, when the transmission assembly 21 needs to be connected to the drive host 22, at least one blocking block 223 in the host housing 222 can be embedded in the card slot 530 and fit with the inner end surface of the boss 511. At this time, the blocking block 223 blocks the movement of the boss 511, thereby limiting the polishing machine head from being removed from the host housing 222. When the connector needs to be disassembled from the drive host, the blocking block 223 is moved out of the card slot 530 to release the restriction of the blocking block 223 on the movement of the connector 500, and the connector 500 can be pulled out of the host housing 222.

[0072] The structure for driving the blocking block 223 to move between different positions to achieve locking and unlocking of the connector is as follows: Figure 11 , Attachment Figure 12 As shown, a knob 225 and a fixed block 226 are coaxially arranged in the main housing 222. The axis of the knob 225 is coaxial with the axis of the socket of the main housing 222 and can rotate relative to the main housing. Under the action of external force, the knob 225 can rotate relative to the main housing 222 around its axis, thereby cooperating with the fixed block 226 to drive the movement of the blocking block 223. The fixed block 226 is fixed in the main housing.

[0073] As attached Figure 13As shown, the knob 225 includes a first circular ring 225b and a second circular ring 225c that are coaxial and maintain a gap 225a. They have the same inner diameter. The first circular ring 225b faces outward, and the second circular ring 225c faces inward (here, the outside of the socket of the housing is considered the outside, and the inside of the socket is considered the inside). They are connected by an operating part 225d located at their edges. There are two operating parts 225d located on opposite sides of the first circular ring. Each operating part 225d has a portion that protrudes to the outside of the main body housing 222, facilitating manual rotation of the knob 225.

[0074] As shown in the attached Figure 12 - attached Figure 14 As shown, the outer diameter of the first circular ring 225b is greater than the outer diameter of the second circular ring 225c. The distance of the gap 225a is equivalent to the thickness of the blocking block 223. The blocking block 223 is located at the gap 225a. Two oppositely positioned bumps 225e are formed on the circumference of the second circular ring 225c. A first connection hole 225f is formed on the bump. A second connection hole 225g that is aligned with each first connection hole 225f is formed on the portion of the first circular ring that is outside the circumference of the second circular ring. A pin 225h that is parallel to the axis of the first circular ring is installed at the coaxial first connection hole and second connection hole. The blocking block 223 is arranged on the pin 225h. The pin 225 passes through the arc-shaped driving hole 223a on the blocking block 223. When the pin 225h is located at the first end 223b of the arc-shaped driving hole 223a, the projection of the blocking block 223 and the circular hole of the first circular ring 225b on the same projection plane perpendicular to the axis of the first circular ring 225b has an overlapping part; when the pin 225 is located at the second end 223c of the arc-shaped hole 223a, the projection of the blocking block 223 and the circular hole of the first circular ring 225b on the same projection plane perpendicular to the axis of the first circular ring 225b has no overlapping part or has very little overlapping part and the overlapping part is not located at the...

[0075] As shown in the attached Figure 12 and attached Figure 15As shown, the fixed block 226 is fixed to the inner side of the knob 225. It includes a plugging portion 226a that matches the socket portion 2110 of the connecting head 500 and a mounting disc 226b. The outer contour of the plugging portion 226a matches the inner hole of the socket portion 2110, and the plugging portion 226a extends into the first ring and the second ring. When the cleaning machine head is connected to the driving host, the plugging portion 226a is inserted into the socket portion 2110 of the connecting head. The mounting disc 226b is fixedly connected to the host housing. A limiting boss 226c is formed on the mounting disc 226b. The limiting boss 226c extends from the surface of the mounting disc 226b facing the knob towards the knob, and its quantity matches the quantity of the blocking blocks 223. In this solution, there are four limiting bosses 226c. Two are located on the upper side of the mounting disc 226b, and they cooperate to limit the vertical movement of one blocking block located between them. The other two are located on the lower side of the mounting disc 226b, and they cooperate to limit the vertical movement of the other blocking block located between them.

[0076] As shown in the attached Figure 12 - Figure 13 - Figure 15 - Figure 16 As shown, two arc-shaped grooves 225i are further formed on the opposite sides of the second ring 225c. The openings of the two arc-shaped grooves 225i face the mounting disc 226b of the fixed block 226, and the two arc-shaped grooves 225i and the two convex blocks 225e are located on the upper, lower, left, and right four sides of the second ring 225c. A return spring 227 is arranged in each arc-shaped groove 225i. The arc-shaped groove 225i includes a long groove section and a short groove section. The width of the long groove section is greater than that of the short groove section. The return spring is located in the long groove section. The two ends of the return spring 227 abut against the two ends of the long groove section. A butting convex block 226d is inserted into the short groove section. The butting boss 226d extends from the end surface of the mounting disc 226b facing the knob ring towards the knob ring and extends into the short groove section. When the knob ring is twisted under an external force, it cooperates with the butting convex block 226d to compress the return spring 227.

[0077] As shown in the attached Figure 14As shown, in its normal state, the return spring 227 positions the pin 225h at the first end 223b of the arc-shaped hole 223a. At this time, the connector 500 cannot be effectively inserted. When it is necessary to install or remove the cleaning machine head, rotate the knob 225. The knob 225 drives the pin 225h to rotate. The pin 225h drives the blocking block to move away from the center of the insertion part 226a. At the same time, the return spring 227 is compressed. At this time, the connector of the cleaning machine head can be inserted into the main machine housing towards the socket. After inserting the cleaning machine head, release the knob 225. The knob 225 resets under the reaction force of the return spring 227. Thus, the pin on the knob drives the blocking block to reset (move towards the center of the insertion part) and embed into the card slot of the connector. The blocking block blocks the boss 511 of the connector from exiting, and finally confines the connector in the main machine housing.

[0078] As shown in the attached Figure 12 drawing, Figure 13 drawing, Figure 15 drawing, in order to facilitate assembly, a plurality of arc-shaped through holes 225j are formed on the part of the first ring 225b located on the outer circumference of the second ring. The mounting plate 226b is also provided with limit hooks 226e that match each arc-shaped through hole 225j. The limit hooks 226e are arranged on the three limit bosses 226c. The limit hooks 226e pass through the arc-shaped through holes 225j, and their hook parts are slidably connected to the outer surface of the first ring 225b, thereby connecting the knob 225 and the fixed block 226 into a whole.

[0079] As shown in the attached Figure 12 drawing, Figure 13 drawing, Figure 15 drawing, on the circumferential surface of the mounting plate 226b, there is also a shielding part 226f that is opposite to the arc-shaped groove 225i and shields the notch of the arc-shaped groove 225i. Thus, when the knob 225 and the fixed block 226 are connected into a whole, the shielding part 226f can limit the return spring 227 from exiting the arc-shaped groove 225i, thereby having better coverage of the return spring 227 and better mechanical strength at the same time.

[0080] When assembling the drive host 22, the knob 225 and the fixed block 226 can be first connected into a whole, and then they can be integrally connected to the half housing of the main machine housing to facilitate reducing the installation difficulty.

[0081] There are still various implementation manners of the present invention. All technical solutions formed by equivalent transformation or equivalent substitution fall within the protection scope of the present invention.

Claims

1. The polishing headstock, comprising a housing, a transmission mechanism and a polishing head, characterized in that: The polishing heads are coaxially and detachably connected to quick-change heads. The quick-change heads are connected to the transmission mechanism. The quick-change heads include a coaxial clamping disc, a limiting disc and a connecting body connected between them. The clamping disc has at least one clamping boss protruding to the outside of the connecting body. The limiting disc has a limiting portion protruding to the outside of the connecting body. A clamping plate that can be clamped between the clamping boss and the limiting portion is provided at the center of the carrier of the polishing head. The thickness of the clamping plate is equivalent to the distance between the clamping disc and the limiting disc, and a perforation matching the side profile of the clamping disc is formed at its center. The perforation includes a round hole portion and an arc hole portion located at the side of the round hole portion. A blocking body that matches the clamping boss to limit the relative rotation between the quick-change head and the polishing head is formed on the end face of the clamping plate facing away from the quick-change head. The blocking body and the arc hole portion are misaligned and distributed on the side of the round hole portion and maintain a gap; The transmission mechanism includes an output shaft that is coaxially and detachably connected to the quick-change head. The output shaft can rotate and move along its axis. Its outer end extends outside the housing, and its inner end is coaxially and torque-transmittingly connected to a torque-transmitting member. The output shaft is inserted into the torque-transmitting member and the two are kept connected by an elastic mechanism. The torque-transmitting member is rotatably and fixedly arranged in the housing; The output shaft is movably and rotatably inserted into a shaft sleeve. The shaft sleeve is fixed in the housing or a cover body. At least two convex portions are formed on the side wall of the output shaft. The gap between two adjacent convex portions forms a rotation-stopping groove. A rotation-stopping protrusion corresponding to the position of the rotation-stopping groove is formed on the inner wall of the end plate of the housing or the cover body.

2. The polishing headstock according to claim 1, characterized in that: The quick-change head has an I-shaped central hole and is connected to the transmission mechanism by bolts.

3. The polishing headstock according to claim 1, characterized in that: A clamping groove is formed on the end face of the clamping boss facing the limiting disc, and a limiting convex rib is formed on the end face of the clamping plate facing away from the quick-change head. When the clamping boss abuts against the blocking body, the limiting convex rib is located in the clamping groove.

4. The polishing headstock according to claim 1, characterized in that: There are two clamping bosses and they are opposite in position. The side profile of the limiting portion is circular and the diameter of the circle is equivalent to the distance between the outer ends of the two clamping bosses. There are two blocking bodies, and each blocking body is adjacent to an arc hole.

5. The polishing headstock according to claim 1, characterized in that: A steering indication mark is formed on the carrier of the polishing head.

6. The polishing headstock according to any one of claims 1-5, characterized in that: A connecting head is provided on the housing, and a spline connecting member of the transmission mechanism is coaxially and rotatably arranged in the connecting head.

7. A polishing machine, characterized in that: It includes the polishing headstock according to any one of claims 1-6.

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