Semi-automatic precious metal polishing machine

Abstract

The present invention relates to the technical field of precious metal polishing, and particularly to a semi-automatic precious metal polishing machine. The semi-automatic precious metal polishing machine includes a frame, a support assembly, a polishing disc and a driving mechanism. The support assembly is installed on the frame. The support assembly is provided with an opening, a circular groove and a clearance opening that are interconnected. A part of the polishing disc is rotatably arranged in the circular groove, and another part of the polishing disc extends out of the circular groove. The polishing disc is provided with a guiding channel and a polishing space that are interconnected. The driving mechanism can drive the polishing disc to rotate. For the semi-automatic precious metal polishing machine of the present invention, the polishing disc is rotatably arranged in the circular groove of the support assembly, and the driving mechanism drives the polishing disc to rotate. This is conducive to the stable friction between the polishing disc and the surface of the precious metal bracelet under the support of the support assembly, so as to improve the polishing quality of the precious metal bracelet.

Description

Technical Field

[0001] The present invention relates to the technical field of precious metal polishing, and particularly to a semi-automatic polishing machine for precious metals. Background Art

[0002] In order to make the surface of a precious metal bracelet have a mirror effect, the precious metal bracelet is generally polished by a polishing method. In the traditional technology, the precious metal bracelet generally contacts the outer surface of the precious metal bracelet through a polishing rod, and the outer surface of the precious metal bracelet is polished by the friction of the polishing rod. However, the contact area between the polishing rod and the precious metal bracelet is limited, and it is difficult to control the contact of the polishing rod with all surfaces of the precious metal bracelet, resulting in a problem of low polishing quality. Summary of the Invention

[0003] Based on this, it is necessary to provide a semi-automatic polishing machine for precious metals to solve the problem of low polishing quality of precious metal bracelets.

[0004] A semi-automatic polishing machine for precious metals, comprising:

[0005] A frame;

[0006] A support assembly, the support assembly is installed on the frame, and the support assembly is provided with an opening, a circular groove and a clearance opening that communicate with each other. The opening is provided on one side of the support assembly, the circular groove is provided at one end of the support assembly, and the clearance opening is provided at the other end of the support assembly;

[0007] A polishing disc, a part of the polishing disc is rotatably arranged in the circular groove, and the other part of the polishing disc extends out of the circular groove. The polishing disc is provided with a guiding channel and a polishing space that communicate with each other. The guiding channel is provided on one side of the polishing disc, and the guiding channel can communicate with the opening. The polishing space penetrates one end of the polishing disc, and the position of the polishing space corresponds to the axis line of the polishing disc. The polishing space communicates with the clearance opening; and

[0008] A driving mechanism, the driving mechanism can drive the polishing disc to rotate.

[0009] The above-mentioned semi-automatic polishing machine for precious metals controls the guide channel of the polishing disc to be connected with the opening of the supporting assembly before polishing. Then, the precious metal bracelet is placed in the polishing space of the polishing disc through the opening and the guide channel. During polishing, the polishing disc is controlled to rotate by the driving mechanism so that the outer surface of the precious metal bracelet rubs against the polishing disc in the polishing space. The precious metal bracelet is rotated so that the outer surface of the precious metal bracelet passes through the polishing space in turn to polish the outer surface of the precious metal bracelet. After polishing, the guide channel of the polishing disc is controlled to be connected with the opening of the supporting assembly. The precious metal bracelet passes through the polishing space, the guide channel and the opening in turn to take out the precious metal bracelet. Through the above-mentioned design, the polishing disc is rotatably arranged in the circular groove of the supporting assembly, and the driving mechanism drives the polishing disc to rotate. This is conducive to the stable friction between the polishing disc and the surface of the precious metal bracelet under the support of the supporting assembly, thereby achieving the problem of improving the polishing quality of the precious metal bracelet.

[0010] In one embodiment, the driving mechanism includes a driving wheel, a tensioning assembly, a transmission belt and a driving member. The driving wheel and the tensioning assembly are both connected to the frame, the transmission belt is wound around the driving wheel, the tensioning assembly and the polishing disk, and the driving member is connected to the driving wheel.

[0011] In one embodiment, the tensioning assembly includes a rocker arm, a tensioning member and a tensioning wheel. The rocker arm is pivotally connected to the frame, one end of the tensioning member is connected to the frame, and the other end of the tensioning member is connected to the rocker arm. The tensioning wheel is rotatably arranged at one end of the rocker arm away from the tensioning member, and the transmission belt is wrapped around the tensioning wheel.

[0012] In one embodiment, the driving mechanism also includes a guide frame, an adjustment block, a connecting piece and a guide wheel. The guide frame is fixedly arranged and provided with a fixing hole. The adjustment block is provided with a strip hole. The connecting piece passes through the strip hole and is connected to the fixing hole. The guide wheel is installed on the adjustment block. The guide wheel is located between the polishing disk and the tensioning assembly. The transmission belt is wrapped around the guide wheel.

[0013] In one embodiment, the frame includes a fixing member, an adapter and a limiting member. The fixing member is fixedly arranged and provided with an adjustment groove. The adapter is slidably arranged in the adjustment groove. One end of the limiting member is connected to the fixing member, and the other end of the limiting member is abutted against the adapter. The driving member is installed on the fixing member, and the supporting assembly is installed on the adapter.

[0014] In one of the embodiments, the frame further comprises a liquid collecting tray, the liquid collecting tray is provided with a liquid collecting trough, and the fixing member is installed in the liquid collecting trough.

[0015] In one embodiment, the support assembly includes a support member and a guide wheel. The support member is connected to the frame, the guide wheel is installed on the support member, the opening, the circular groove and the air avoidance are all arranged on the support member, the guide wheel is located between the driving wheel and the polishing disk, and the transmission belt is wrapped around the guide wheel.

[0016] In one embodiment, the support member is further provided with a protection channel which is communicated with the circular groove. The guide wheel is arranged in the protection channel, and the transmission belt passes through the protection channel.

[0017] In one embodiment, the support member includes a support block and a mounting block. The support block is connected to the frame, and the mounting block is detachably connected to the support block. The support block is provided with a first inlet, and the mounting block is provided with a second inlet communicated with the first inlet. The first inlet and the second inlet together form an opening. The circular groove and the clearance opening are both arranged on the mounting block, and both the circular groove and the clearance opening are communicated with the second inlet.

[0018] In one embodiment, the polishing disc includes a disc body, polishing blocks, a lever and elastic members. The disc body is rotatably arranged in the circular groove. The disc body is provided with an inner cavity and a limiting groove. The number of the polishing blocks is multiple, and the multiple polishing blocks are slidably arranged in the inner cavity. The number of the elastic members is the same as that of the polishing blocks. Each elastic member respectively drives each polishing block to move towards the axis direction of the disc body to enclose a polishing space. The lever is connected to the polishing block and is slidably arranged in the limiting groove. The guiding channel is arranged on the disc body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the semi-automatic precious metal polishing machine shown in the embodiment of the present invention;

[0020] Figure 2 is Figure 1 a schematic structural diagram of another perspective of the semi-automatic precious metal polishing machine shown;

[0021] Figure 3 is Figure 1 a top view of the semi-automatic precious metal polishing machine shown with partial sectioning;

[0022] Figure 4 is Figure 3 a sectional view of the semi-automatic precious metal polishing machine shown in the A-A direction;

[0023] Figure 5 is Figure 3 an exploded view of the guide frame, the adjusting block, the connecting member and the guide wheel of the semi-automatic precious metal polishing machine shown;

[0024] Figure 6 is Figure 3 a schematic structural diagram of the polishing disc of the semi-automatic precious metal polishing machine shown;

[0025] Figure 7 is Figure 6 a partial structural diagram of the polishing disc shown;

[0026] Figure 8 is Figure 1Schematic structural diagram of the support assembly of the precious metal semi-automatic polishing machine for installing the polishing disc;

[0027] Figure 9 The Figure 8 Cross-sectional view of the support assembly and the polishing disc shown;

[0028] Figure 10 The Figure 8 Cross-sectional view of the support assembly shown;

[0029] Figure 11 The Figure 8 Exploded schematic diagram of the support assembly shown.

[0030] The meanings of the reference numerals in the drawings are as follows:

[0031] 100, precious metal semi-automatic polishing machine;

[0032] 10, drive mechanism; 11, driving wheel; 12, tensioning assembly; 121, rocker arm; 122, tensioning member; 123, tensioning wheel; 13, transmission belt; 14, driving member; 15, guide frame; 151, fixing hole; 16, adjusting block; 161, strip hole; 17, connecting member; 18, guide wheel;

[0033] 20, frame; 21, fixing member; 211, adjusting groove; 22, adapter; 23, limiting member; 24, liquid collecting tray; 241, liquid collecting groove;

[0034] 30, polishing disc; 31, disc body; 311, inner cavity; 312, limiting groove; 313, guiding channel; 314, polishing space; 32, polishing block; 33, lever; 34, elastic member; 35, transmission assembly; 351, transmission block; 352, guiding rod;

[0035] 40, support assembly; 41, support member; 411, opening; 412, circular groove; 413, clearance opening; 414, protection channel; 415, support block; 416, mounting block; 417, first inlet; 418, second inlet; 42, guide wheel. Detailed implementation manners

[0036] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention is provided in conjunction with the drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0037] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, 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 should not be construed as a limitation to the present invention.

[0038] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0039] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher level than the second feature in terms of horizontal height. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower level than the second feature in terms of horizontal height.

[0041] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0042] As Figures 1 to 11 shown, it is a semi-automatic precious metal polishing machine 100 of an embodiment of the present invention.

[0043] As Figures 1 to 11 shown, the semi-automatic precious metal polishing machine 100 includes: a frame 20, a support assembly 40, a polishing disc 30 and a driving mechanism 10. Among them, the frame 20 is used to install the support assembly 40 and the driving mechanism 10, the support assembly 40 is used to control the polishing disc 30 to rotate at a defined position, the polishing disc 30 is used to polish the surface of the precious metal bracelet by rotation, and the driving mechanism 10 is used to drive the polishing disc 30 to rotate. By adopting the method that the polishing disc 30 is rotatably arranged in the support assembly 40 and the driving mechanism 10 drives the polishing disc 30 to rotate, it is beneficial for the polishing disc 30 to stably rub against the surface of the precious metal bracelet under the support of the support assembly 40, so as to improve the polishing quality of the precious metal bracelet.

[0044] Below, in combination with Figures 1 to 11 , the above-mentioned semi-automatic precious metal polishing machine 100 will be further described.

[0045] As Figures 1 to 3 shown, the driving mechanism 10 can drive the polishing disc 30 to rotate. Specifically, the driving mechanism 10 includes a driving wheel 11, a tensioning assembly 12, a transmission belt 13 and a driving member 14. The driving wheel 11 and the tensioning assembly 12 are both connected to the frame 20. The transmission belt 13 is wound around the driving wheel 11, the tensioning assembly 12 and the polishing disc 30, and the driving member 14 is connected to the driving wheel 11. By connecting the driving member 14 to the driving wheel 11 and winding the transmission belt 13 around the driving wheel 11, the tensioning assembly 12 and the polishing disc 30, it is beneficial for the driving member 14 to control the driving wheel 11 to rotate to drive the polishing disc 30 to rotate, and avoid potential safety hazards caused by the reverse torque of the precious metal bracelet when the precious metal bracelet blocks the rotation of the polishing disc 30 during the polishing process. Among them, the driving member 14 can be a speed-regulating motor, and the speed-regulating motor can set different speeds according to different polishing degrees. The transmission belt 13 can be a round belt. By adopting this friction transmission method of the round belt, it is beneficial to further reduce the reverse torque on the precious metal bracelet when the polishing disc 30 is blocked, so as to reduce potential safety hazards.

[0046] Specifically, in order to improve the transmission stability of the transmission belt 13, asFigures 2 to 3 As shown, the tensioning assembly 12 includes a rocker arm 121, a tensioning member 122 and a tensioning wheel 123. The rocker arm 121 is pivotally connected to the frame 20. One end of the tensioning member 122 is connected to the frame 20, and the other end of the tensioning member 122 is connected to the rocker arm 121. The tensioning wheel 123 is rotatably arranged at one end of the rocker arm 121 away from the tensioning member 122, and the transmission belt 13 is wound around the tensioning wheel 123. Among them, the tensioning member 122 is a tension spring, and one end of the tensioning member 122 is connected to the frame 20, and the other end of the tensioning member 122 is connected to the rocker arm 121, which is conducive to the tensioning wheel 123 always keeping squeezing the transmission belt 13, thereby achieving the purpose of improving the transmission stability of the transmission belt 13.

[0047] Furthermore, in order to improve the polishing convenience of precious metal bracelets, such as Figure 2 , Figure 3 and Figure 5 As shown, the driving mechanism 10 also includes a guide frame 15, an adjustment block 16, a connecting member 17 and a guide wheel 18. The guide frame 15 is fixedly arranged, and the guide frame 15 is provided with a fixing hole 151. The adjustment block 16 is provided with a strip hole 161. The connecting member 17 passes through the strip hole 161 and is connected with the fixing hole 151. The guide wheel 18 is installed on the adjustment block 16, and the guide wheel 18 is located between the polishing disc 30 and the tensioning assembly 12. The transmission belt 13 is wound around the guide wheel 18. Among them, the connecting member 17 is a screw, and the guide wheel 18 is installed on the adjustment block 16, and the guide wheel 18 is located between the polishing disc 30 and the tensioning assembly 12, which is conducive to changing the position of the transmission belt 13 by adjusting the position of the guide wheel 18, providing space for the precious metal bracelet to be loaded into the polishing disc 30, so as to achieve the purpose of improving the polishing convenience of the precious metal bracelet during polishing.

[0048] like Figures 3 to 4 As shown, the frame 20 includes a fixing member 21, an adapter 22 and a limiting member 23. The fixing member 21 is fixedly arranged and used to install the driving member 14. The fixing member 21 is provided with an adjustment slot 211. The adapter 22 is slidably arranged in the adjustment slot 211. One end of the limiting member 23 is connected to the fixing member 21, and the other end of the limiting member 23 abuts against the adapter 22. The driving member 14 is mounted on the fixing member 21, and the supporting assembly 40 is mounted on the adapter 22. The limiting member 23 can be a screw, and the screw is rotated so that one end of the screw abuts against the adapter 22, so as to limit the adapter 22 in the adjustment slot 211 and prevent the adapter 22 from sliding in the adjustment slot 211. The driving member 14 is installed on the fixing member 21, the supporting assembly 40 is installed on the adapter 22, and the adapter 22 is slidably set in the adjustment groove 211 of the fixing member 21. This is beneficial to controlling the position of the supporting assembly 40 relative to the driving member 14 to keep the transmission belt 13 in a tensioned state, thereby achieving the purpose of improving the rotational stability of the transmission belt 13 controlling the polishing disk 30 during rotation.

[0049] Further, the frame 20 further includes a liquid collecting tray 24. The liquid collecting tray 24 is provided with a liquid collecting groove 241, and the fixing member 21 is installed in the liquid collecting groove 241. When polishing a precious metal bracelet, the liquid sprayed on the precious metal bracelet can be collected through the liquid collecting groove 241 provided on the liquid collecting tray 24, avoiding liquid waste and achieving the purpose of reducing the polishing cost. Understandably, a liquid collecting port communicating with the liquid collecting groove can be provided on the liquid collecting tray 24 to collect and store the liquid in the liquid collecting groove, facilitating the recycling of the liquid. Alternatively, the liquid in the liquid collecting groove can be directly pumped by a water pump, facilitating the recycling of the liquid.

[0050] As Figures 1 to 4 shown, the support assembly 40 is installed on the frame 20. As Figure 10 shown, the support assembly 40 is provided with an opening 411, a circular groove 412 and a clearance opening 413 that communicate with each other. The opening 411 is provided on one side of the support assembly 40, the circular groove 412 is provided at one end of the support assembly 40, and the clearance opening 413 is provided at the other end of the support assembly 40. Specifically, the support assembly 40 includes a support member 41 and a guide wheel 42. The support member 41 is connected to the frame 20, the guide wheel 42 is installed on the support member 41, the opening 411, the circular groove 412 and the clearance opening 413 are all provided on the support member 41, and the guide wheel 42 is located between the driving wheel 11 and the polishing disc 30. The transmission belt 13 is wound around the guide wheel 42. The position of the transmission belt 13 is adjusted through the guide wheel 42 so that the transmission belt 13 can abut against the side wall of the polishing disc 30, thereby enabling the transmission belt 13 to stably drive the polishing disc 30 to rotate.

[0051] Further, in order to prevent the transmission belt 13 from being damaged by the outside and improve the use stability and service life of the transmission belt 13, as Figure 4 、 Figures 8 to 11 shown, the support member 41 is further provided with a protection channel 414. The protection channel 414 communicates with the circular groove 412, the guide wheel 42 is arranged in the protection channel 414, and the transmission belt 13 passes through the protection channel 414.

[0052] Furthermore, in order to improve the service life of the support member 41 and the maintenance economy of the support member 41, the support member 41 includes a support block 415 and a mounting block 416. The support block 415 is connected to the frame 20, the mounting block 416 is detachably connected to the support block 415. The support block 415 is provided with a first inlet 417, the mounting block 416 is provided with a second inlet 418 communicating with the first inlet 417. The first inlet 417 and the second inlet 418 jointly form the opening 411. The circular groove 412 and the clearance opening 413 are both provided on the mounting block 416, and the circular groove 412 and the clearance opening 413 both communicate with the second inlet 418. By detachably connecting the mounting block 416 and the support block 415, when the mounting block 416 is worn, the mounting block 416 can be replaced to improve the maintenance economy of the support member 41.

[0053] As shown Figures 8 to 9 in the figure, a part of the polishing disc 30 is rotatably arranged in the circular groove 412, and the other part of the polishing disc 30 extends out of the circular groove 412. As shown Figures 6 to 7 in the figure, the polishing disc 30 is provided with a guiding channel 313 and a polishing space 314 which are communicated with each other. The guiding channel 313 is arranged on one side of the polishing disc 30, and the guiding channel 313 can be communicated with the opening 411. The polishing space 314 penetrates through one end of the polishing disc 30, and the position of the polishing space 314 is correspondingly arranged with the axis line of the polishing disc 30. The polishing space 314 is communicated with the clearance opening 413. Specifically, the polishing disc 30 includes a disc body 31, polishing blocks 32, a lever 33 and an elastic member 34. The disc body 31 is rotatably arranged in the circular groove 412. The disc body 31 is provided with an inner cavity 311 and a limiting groove 312. The number of the polishing blocks 32 is multiple. The multiple polishing blocks 32 are slidably arranged in the inner cavity 311. The number of the elastic members 34 is the same as that of the polishing blocks 32. Each elastic member 34 drives each polishing block 32 to move towards the axis line direction of the disc body 31 to enclose the polishing space 314. The lever 33 is connected with the polishing block 32, and the lever 33 is slidably arranged in the limiting groove 312. The guiding channel 313 is arranged on the disc body 31. Among them, the elastic member 34 is a spring. In this embodiment, by controlling the lever 33, each polishing block 32 can be separated, the precious metal bracelet can be put into the polishing space 314 through the guiding channel 313, and the lever 33 is released. The polishing blocks 32 move towards the axis line of the polishing disc 30 under the push of the elastic member 34, so that each polishing block 32 abuts against the precious metal bracelet.

[0054] Understandably, as shown Figure 7 in the figure, a transmission assembly 35 can be connected between the polishing blocks 32 to guide the synchronous movement of each polishing block 32, so that the extrusion force when each polishing block 32 contacts the precious metal bracelet is kept consistent, so as to improve the polishing effect. Specifically, the transmission assembly 35 can be two transmission blocks 351 and a guiding rod 352 that pivotally connects the two transmission blocks 351. By controlling the ends of the two transmission blocks 351 away from the guiding rod 352 to be pivotally connected with the adjacent two polishing blocks 32, at the same time, the sliding direction of the guiding rod 352 is restricted, so as to realize the synchronous movement of the polishing blocks 32.

[0055] The working principle of the semi-automatic precious metal polishing machine 100 of the present invention is as follows: Before polishing, the guiding channel 313 of the polishing disc 30 is controlled to communicate with the opening 411 of the supporting component 40. Then, the precious metal bracelet is placed in the polishing space 314 of the polishing disc 30 through the opening 411 and the guiding channel 313. During polishing, the polishing disc 30 is rotated by the driving mechanism 10, so that the outer surface of the precious metal bracelet rubs against the polishing disc 30 in the polishing space 314. By rotating the precious metal bracelet, the outer surface of the precious metal bracelet passes through the polishing space 314 in sequence to polish the outer surface of the precious metal bracelet. After polishing, the guiding channel 313 of the polishing disc 30 is controlled to communicate with the opening 411 of the supporting component 40, and the precious metal bracelet passes through the polishing space 314, the guiding channel 313 and the opening 411 in sequence to take out the precious metal bracelet.

[0056] The beneficial effect of the semi-automatic precious metal polishing machine 100 of the present invention is as follows: The polishing disc 30 is rotatably arranged in the circular groove 412 of the supporting component 40, and the driving mechanism 10 drives the polishing disc 30 to rotate, which is beneficial to the stable friction between the polishing disc 30 and the surface of the precious metal bracelet under the support of the supporting component 40, so as to improve the polishing quality of the precious metal bracelet.

[0057] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0058] The above-described embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. A semi-automatic polishing machine for precious metals, characterized in that, include: frame; A support assembly, the support assembly is mounted on the frame, the support assembly is provided with an opening, a circular groove and a gap-avoiding opening which are interconnected, the opening is provided at one side of the support assembly, the circular groove is provided at one end of the support assembly, and the gap-avoiding opening is provided at the other end of the support assembly; A polishing disc, wherein a part of the polishing disc is rotatably disposed in the circular groove, and another part of the polishing disc extends out of the circular groove, and the polishing disc is provided with a guide channel and a polishing space which are interconnected, the guide channel is disposed on one side of the polishing disc, and the guide channel can be communicated with the opening, the polishing space runs through one end of the polishing disc, and the position of the polishing space is arranged corresponding to the axis of the polishing disc, and the polishing space is communicated with the air avoidance opening; and A driving mechanism, wherein the driving mechanism is capable of driving the polishing disc to rotate; The driving mechanism comprises a driving wheel, a tensioning assembly, a transmission belt and a driving member, wherein the driving wheel and the tensioning assembly are both connected to the frame, the transmission belt is wound around the driving wheel, the tensioning assembly and the polishing disc, and the driving member is connected to the driving wheel; The tensioning assembly comprises a rocker arm, a tensioning member and a tensioning wheel, wherein the rocker arm is pivotally connected to the frame, one end of the tensioning member is connected to the frame, and the other end of the tensioning member is connected to the rocker arm, the tensioning wheel is rotatably arranged at one end of the rocker arm away from the tensioning member, and the transmission belt is wound around the tensioning wheel; The support assembly includes a support member and a guide wheel, the support member is connected to the frame, the guide wheel is mounted on the support member, the opening, the circular groove and the air-avoiding opening are all arranged on the support member, the guide wheel is located between the driving wheel and the polishing disc, and the transmission belt is wound around the guide wheel; The polishing disc includes a disc body, a polishing block, a lever and an elastic member. The disc body is rotatably arranged in the circular groove. The disc body is provided with an inner cavity and a limiting groove. There are multiple polishing blocks, and the multiple polishing blocks are slidably arranged in the inner cavity. The number of the elastic members is the same as the number of the polishing blocks. Each of the elastic members drives each of the polishing blocks to move toward the axial center line direction of the disc body to enclose the polishing space. The lever is connected to the polishing block, and the lever is slidably arranged in the limiting groove. The guide channel is arranged on the disc body.

2. The semi-automatic polishing machine for precious metals according to claim 1, characterized in that, The driving mechanism also includes a guide frame, an adjustment block, a connecting piece and a guide wheel. The guide frame is fixedly arranged and provided with a fixing hole. The adjustment block is provided with a strip hole. The connecting piece passes through the strip hole and is connected to the fixing hole. The guide wheel is installed on the adjustment block. The guide wheel is located between the polishing disk and the tensioning assembly. The transmission belt is wrapped around the guide wheel.

3. The semi-automatic precious metal polishing machine according to claim 1, characterized in that, The frame includes a fixing member, an adapter and a limiting member, the fixing member is fixedly arranged, the fixing member is provided with an adjustment slot, the adapter is slidably arranged in the adjustment slot, one end of the limiting member is connected to the fixing member, and the other end of the limiting member abuts against the adapter, the driving member is installed on the fixing member, and the supporting assembly is installed on the adapter.

4. The semi-automatic precious metal polishing machine according to claim 3, wherein The frame further includes a liquid collecting tray, the liquid collecting tray is provided with a liquid collecting groove, and the fixing member is installed in the liquid collecting groove.

5. The semi-automatic precious metal polishing machine according to claim 1, characterized in that, The support member is further provided with a protection channel, the protection channel is communicated with the circular groove, the guide wheel is arranged in the protection channel, and the transmission belt passes through the protection channel.

6. The semi-automatic precious metal polishing machine according to claim 5, characterized in that, The support member includes a support block and a mounting block, the support block is connected to the frame, the mounting block is detachably connected to the support block, the support block is provided with a first inlet, the mounting block is provided with a second inlet communicated with the first inlet, the first inlet and the second inlet together form the opening, the circular groove and the clearance opening are both arranged on the mounting block, and the circular groove and the clearance opening are both communicated with the second inlet.

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