A polishing device for stainless steel artificial joint

Abstract

The application discloses a stainless steel artificial joint polishing device and relates to the technical field of polishing equipment.The device comprises upper and lower constraint members, a profiled flow channel is formed between the upper and lower constraint members, the profiled flow channel is provided with an inlet end and an outlet end, the profiled flow channel is used for the flow of abrasive grain flow abrasives, and the artificial joint is arranged in the profiled flow channel; a shell is arranged on the outer surfaces of the upper and lower constraint members, a cavity is arranged in the shell, and the inlet end of the profiled flow channel is connected with the cavity.The self-rotation of the first column can extrude the abrasive grain flow abrasives, so that the air in the abrasive grain flow abrasives is extruded out, the air in the abrasive grain flow abrasives extruded into the profiled flow channel is expelled in advance, air is prevented from blocking the contact between the abrasives and the surface of the artificial joint, the bubble coverage area cannot be effectively polished, and the uniform polishing of the surface of the artificial joint is ensured.

Description

Technical Field

[0001] This invention relates to the field of polishing equipment technology, and in particular to a polishing device for stainless steel artificial joints. Background Technology

[0002] The surface quality of artificial joints has a crucial impact on their function and lifespan. Therefore, after being molded, metal artificial joint prostheses cannot be directly applied to the human body. They still need to undergo a series of subsequent processes such as grinding and polishing to obtain a high-precision and low-roughness surface, forming an artificial joint that fits well with human bones.

[0003] like Figure 16 As shown, artificial joints have complex shapes due to the numerous curved surfaces on their surface 1101, thus requiring abrasive flow polishing. The abrasive flow can make contour-guided contact with the artificial joint surface 1101, thereby eroding and polishing it. However, in practical use, it has been found that poor contact between the abrasive flow and the artificial joint surface 1101 easily forms localized "blank areas" or rough patches, resulting in uneven polishing of the artificial joint surface. Summary of the Invention

[0004] This invention provides a stainless steel artificial joint polishing device to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] A stainless steel artificial joint polishing device for polishing the surface of an artificial joint, comprising:

[0007] The upper and lower constraints form a contoured flow channel, which has an inlet and an outlet and is used for the flow of abrasive particles. The artificial joint is located inside the contoured flow channel.

[0008] The shell is located on the outer surfaces of the upper and lower constraint members, and the interior of the shell has a cavity, with the inlet end of the contoured flow channel connected to the cavity;

[0009] The first column is located inside the cavity of the shell. The first column is configured to rotate around its central axis. Several circular grooves are evenly distributed on the outer circumference of the first column.

[0010] Several second pillars are respectively disposed in several circular grooves, and the second pillars are coupled to the first pillar. The second pillars have a first state and a second state. The first state is set such that when the outer surface of the second pillar protrudes from the outer surface of the first pillar, the rotation of the first pillar can cause the second pillar to squeeze the abrasive grains. The second state is set such that when the outer surface of the second pillar is flush with the outer surface of the first pillar, the second pillar stops squeezing the abrasive grains.

[0011] A drive assembly, located on the outer surface of the housing, is used for coupling several second columns with the first column.

[0012] As a further embodiment of the present invention, two side plates are symmetrically fixedly installed on the outer surfaces of the upper and lower constraint members on opposite sides.

[0013] As a further embodiment of the present invention, a drive motor is fixedly installed on the outer surface of one of the two side plates. The output end of the drive motor passes through the outer surface of the side plate. The end of the first column near the drive motor passes through the outer surface of the housing and is fixedly connected to the output end of the drive motor. The rotation center of the output end of the drive motor is coaxially arranged with the rotation center of the first column.

[0014] As a further aspect of the present invention, a protective cover is installed at the end of the housing away from the drive motor, and the drive assembly is disposed inside the protective cover. The drive assembly includes:

[0015] Several first gears are provided, and the end of the first column away from the drive motor passes through the outer surface of the housing. The several first gears are rotatably located on the end face of the first column and are arranged at equal intervals.

[0016] Several second gears are rotatably mounted on the end face of the first column and mesh with several first gears respectively. One end of several second columns passes through the end face of the first column and is coaxially fixed with several second gears respectively.

[0017] Several connecting plates are respectively fixed on the outer surface of several first gears;

[0018] A circular ring is fixed to the end face of the housing away from the drive motor, and a groove is formed on the outer surface of the circular ring;

[0019] Several rods are fixed to the ends of several connecting plates away from the first gear, and several rods are slidably installed in the groove.

[0020] As a further embodiment of the present invention, the groove includes a large circular arc groove and a small circular arc groove, the centers of the large circular arc groove and the small circular arc groove are arranged to coincide with the rotation center of the first column, the small circular arc groove is located on the side of the ring near the artificial joint, and the large circular arc groove is located on the other side of the ring.

[0021] As a further embodiment of the present invention, a first partition is fixedly provided on the top wall of the housing cavity, the bottom of the first partition abuts against the outer circumferential surface of the first column, a rotating shaft is rotatably installed between the inner walls of opposite ends of the housing cavity, a second partition is fixedly installed on the outer surface of the rotating shaft, the bottom of the second partition abuts against the outer circumferential surface of the first column, the outer surface of the rotating shaft is flush with the top wall of the housing cavity, and a second cavity is formed between the first partition, the second partition and the housing cavity.

[0022] As a further embodiment of the present invention, one end of the rotating shaft near the drive motor passes through the outer surface of the housing and is fitted with a torsion spring. One end of the torsion spring is fixedly connected to the outer surface of the housing, and the other end of the torsion spring is fixedly connected to the outer surface of the rotating shaft.

[0023] As a further embodiment of the present invention, a circular hole is provided inside the first column, and a rotary joint is rotatably installed at the other end of the first column. The rotary joint is connected to the circular hole. Multiple slots are equally spaced along the circumferential direction of the inner wall of the circular hole. The multiple slots are respectively connected to several circular grooves. A plate is slidably inserted into the inner wall of each of the multiple slots. An exhaust groove is provided on the outer surface of one side of the plate. One end of the exhaust groove near the circular hole penetrates the outer surface of the plate and is connected to the circular hole. A tension spring is fixedly connected to the outer surface of the plate at the circular hole. The other end of the tension spring is fixedly connected to the inner wall of the circular hole.

[0024] As a further embodiment of the present invention, the outer circumferential surface of the second column is provided with an arc surface, the radius of which is the same as that of the first column. A first cavity is formed between the arc surface and the circular groove, and the first cavity is connected to the circular hole through an exhaust groove.

[0025] As a further embodiment of the present invention, two through holes are provided on the end face of the lower constraint member near the housing. The contoured flow channel is connected to the cavity of the housing through the two through holes. Two baffles are fixedly installed on the outer surface of the lower constraint member near the two through holes. The two baffles are disposed inside the contoured flow channel and positioned above the two through holes.

[0026] Beneficial effects:

[0027] The stainless steel artificial joint polishing device disclosed in this application uses the rotation of the first column to enable the second column to squeeze the abrasive flow, thereby squeezing out the air inside the abrasive flow. This allows the air inside the abrasive flow that has been squeezed into the contoured flow channel to be expelled in advance, avoiding the air blocking the contact between the abrasive and the artificial joint surface, which would prevent the air-covered area from being effectively polished, thus ensuring uniform polishing of the artificial joint surface. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a front view structural schematic diagram of a stainless steel artificial joint polishing device disclosed in this invention;

[0030] Figure 2This is a rear view structural schematic diagram of a stainless steel artificial joint polishing device disclosed in this invention;

[0031] Figure 3 This is a schematic diagram of the installation of an artificial joint in a stainless steel artificial joint polishing device disclosed in this invention.

[0032] Figure 4 This is a schematic diagram of the internal structure of a stainless steel artificial joint polishing device disclosed in this invention.

[0033] Figure 5 This is a schematic diagram of the lower constraint component of a stainless steel artificial joint polishing device disclosed in this invention;

[0034] Figure 6 This is a schematic diagram of the housing of a stainless steel artificial joint polishing device disclosed in this invention;

[0035] Figure 7 This is a schematic diagram of the interior of the housing of a stainless steel artificial joint polishing device disclosed in this invention;

[0036] Figure 8 This is a cross-sectional schematic diagram of the housing of a stainless steel artificial joint polishing device disclosed in this invention;

[0037] Figure 9 This is a schematic diagram of the first column of a stainless steel artificial joint polishing device disclosed in this invention.

[0038] Figure 10 This is a schematic cross-sectional view of the first column of a stainless steel artificial joint polishing device disclosed in this invention.

[0039] Figure 11 for Figure 10 Enlarged view of a portion of point A in the middle;

[0040] Figure 12 This is a schematic diagram of the second column of a stainless steel artificial joint polishing device disclosed in this invention.

[0041] Figure 13 This is a schematic diagram of the plate body of a stainless steel artificial joint polishing device disclosed in this invention;

[0042] Figure 14 This is a schematic diagram of the drive assembly of a stainless steel artificial joint polishing device disclosed in this invention.

[0043] Figure 15 This is a schematic diagram of a stainless steel artificial joint polishing device disclosed in this invention.

[0044] Figure 16 This is a schematic diagram of an artificial joint in a stainless steel artificial joint polishing device disclosed in this invention.

[0045] In the picture:

[0046] 100. Upper constraint component;

[0047] 200, lower constraint; 210, through hole; 220, baffle plate;

[0048] 300, Housing; 400, Side panel; 500, Drive motor;

[0049] 600, First column; 610, Circular groove; 620, Circular hole;

[0050] 700. Second prism; 710. Circular arc surface;

[0051] 800, First partition; 900, Second partition;

[0052] 1000, Plate; 1010, Venting groove; 1020, Tension spring;

[0053] 1100, Artificial joint; 1101, Surface; 1200, Rotary joint;

[0054] 1300, Drive assembly; 1310, First gear; 1320, Second gear; 1330, Connecting plate; 1340, Ring; 1341, Groove; 1350, Rod;

[0055] 1400, Torsion spring; 1500, First cavity; 1600, Contour flow channel; 1700, Second cavity; 1800, Protective cover. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0057] When the artificial joint 1100 is polished on its surface 1101 using abrasive flow abrasive, operators find that some artificial joints 1100 exhibit uneven polishing and inconsistent surface roughness. This phenomenon disappears after the abrasive flow abrasive has been used for a period of time. Through long-term observation and experimentation, operators discovered that this is due to air bubbles inside the abrasive flow abrasive. These air bubbles occupy space in the flow channel, preventing contact between the abrasive flow abrasive and the surface 1101 of the artificial joint 1100. This results in ineffective polishing of the bubble-covered areas, forming localized "blank areas" or rough patches, leading to uneven polishing of the artificial joint 1100's surface 1101.

[0058] To address this problem, this application proposes a stainless steel artificial joint polishing device, such as... Figure 1 and Figure 2 As shown, it includes: an upper constraint member 100, a lower constraint member 200, a housing 300, a first column 600, several second columns 700, and a drive assembly 1300. Specifically, as... Figure 3 As shown, a contoured flow channel 1600 is formed between the upper constraint member 100 and the lower constraint member 200. During use, the operator places the artificial joint 1100 onto the upper surface of the lower constraint member 200, ensuring the lower surface of the artificial joint 1100 fits against the upper surface of the lower constraint member 200. Then, the upper constraint member 100 is fastened onto the lower constraint member 200, resulting in a fixed gap between the upper surface of the artificial joint 1100 and the contoured flow channel 1600. Figure 4 As shown, since the contoured flow channel 1600 is provided with an inlet end and an outlet end, the operator uses an external abrasive flow pump to allow the abrasive flow to enter the contoured flow channel 1600 from the inlet end, pass through the gap between the upper surface of the artificial joint 1100 and the contoured flow channel 1600, and then exit from the outlet end of the contoured flow channel 1600, thus forming a cycle that can polish the upper surface of the artificial joint 1100. Furthermore, because the housing 300 is fixedly installed on the outer surface of the upper constraint member 100 and the lower constraint member 200, and the housing 300 has an internal cavity, the inlet end of the contoured flow channel 1600 is connected to the cavity. Figure 6 and Figure 7 As shown, the outer surface of the housing 300 opposite to the artificial joint 1100 has an opening, and the cross-sectional shape of the opening is as follows. Figure 4 As shown, the opening and the cavity are connected, which facilitates the externally transported abrasive flow to enter the cavity from the opening, and then enter the contoured flow channel 1600 from the cavity through the inlet end of the contoured flow channel 1600.

[0059] like Figure 6 and Figure 7 As shown, the first column 600 is rotatably mounted between the inner walls of opposite ends of the cavity of the housing 300. The outer circumferential surface of the first column 600 is uniformly provided with several circular grooves 610. Several second columns 700 are rotatably mounted between the inner walls of opposite ends of the several circular grooves 610. Furthermore, the first column 600 is configured to rotate about its central axis, with the rotation direction as shown... Figure 8 As indicated by the large arrow. Since the drive assembly 1300 is disposed on the outer surface of the housing 300, the plurality of second pillars 700 are coupled to the first pillar 600 through the drive assembly 1300, and the second pillars 700 have a first state and a second state. When the second pillar 700 is in the first state, the outer surface of the second pillar 700 protrudes beyond the outer surface of the first pillar 600, as shown by the arrow. Figure 8 As shown, when several of the second pillars 700 near the opening of the housing 300 are in the first state, the rotation of the first pillar 600 drives several second pillars 700 to rotate within the cavity of the housing 300 (a gap is provided between the second pillar 700 and the bottom wall of the cavity of the housing 300 to facilitate the pushing of abrasive), with the central axis of the first pillar 600 as the center of rotation, thereby pushing the abrasive flow at the opening of the cavity of the housing 300 into the space on the side of the cavity near the artificial joint 1100. When the abrasive stream is pushed, because the outer surface of the second column 700 protrudes from the outer surface of the first column 600, and in conjunction with the streamlined design of the inner wall of the cavity, the second column 700 compresses the abrasive stream, thereby squeezing out the air inside the abrasive stream. This device ensures that the air inside the abrasive stream squeezed into the contoured flow channel 1600 is expelled in advance, preventing air from obstructing contact between the abrasive and the surface 1101 of the artificial joint 1100, which could lead to ineffective polishing of the bubble-covered area, thus ensuring uniform polishing of the artificial joint surface. The plurality of second columns 700 also have a second state. When the plurality of second columns 700 are in the second state, the outer surface of the second column 700 is flush with the outer surface of the first column 600, such as... Figure 8 As shown, the second pillars 700 near the contoured flow channel 1600 will no longer squeeze the abrasive flow, preventing the second pillars 700 from carrying the abrasive flow back to the opening. At the same time, it is convenient to scrape the abrasive flow from the surface of the second pillars 700 later.

[0060] To ensure that the contoured flow channel 1600 has only an inlet and an outlet, such as Figure 2 As shown, two side plates 400 are symmetrically fixedly installed on the outer surfaces of the upper constraint member 100 and the lower constraint member 200 on opposite sides. The two side plates 400 are fixed between the upper constraint member 100 and the lower constraint member 200 by bolts, and at the same time restrict the position of the upper constraint member 100 and the lower constraint member 200. When the artificial joint 1100 needs to be replaced, only one side plate 400 needs to be removed. The position of the upper constraint member 100 and the lower constraint member 200 is maintained by the remaining side plate 400. The two side plates 400 seal both sides of the contoured flow channel 1600, and at the same time restrict the installation position of the upper constraint member 100 and the lower constraint member 200, so that there is a fixed gap between the upper surface of the artificial joint 1100 and the contoured flow channel 1600.

[0061] In order to drive the first column to rotate 600 degrees, such as Figure 2As shown, a drive motor 500 is fixedly installed on the outer surface of one of the two side plates 400. The output end of the drive motor 500 passes through the outer surface of the side plate 400. The end of the first column 600 near the drive motor 500 passes through the outer surface of the housing 300 and is fixedly connected to the output end of the drive motor 500. The rotation center of the output end of the drive motor 500 coincides with the rotation center of the first column 600. By rotating the output end of the drive motor 500, the first column 600 is driven to rotate around the central axis of the first column 600 within the cavity of the housing 300.

[0062] Specifically, in order for the second column 700 to switch between the first and second states while the first column 600 is rotating, such as... Figure 10 and Figure 14 As shown, the drive assembly 1300 includes: a plurality of first gears 1310, a plurality of second gears 1320, a plurality of connecting plates 1330, a ring 1340, and a plurality of rods 1350. Because the other end of the first rod 600 penetrates the outer surface of the housing 300, the plurality of first gears 1310 are rotatably mounted at equal intervals in the circumferential direction on the end face of the other end of the first rod 600, and the plurality of second gears 1320 are rotatably mounted on the end face of the first rod 600 and mesh with the plurality of first gears 1310 respectively. The rotation of the plurality of first gears 1310 drives the rotation of the plurality of second gears 1320. Furthermore, because one end of each of the plurality of second rods 700 penetrates the end face of the other end of the first rod 600 and is fixedly connected to the rotation center of the plurality of second gears 1320 respectively, the rotation of the plurality of second gears 1320 will drive the rotation of the plurality of second rods 700.

[0063] In order for some of the second pillars 700 to switch between the first and second states according to usage requirements through their own rotation, such as... Figure 10 As shown, several connecting plates 1330 are respectively fixedly installed on the outer surface of several first gears 1310, such as... Figure 6 As shown, the ring 1340 is fixedly installed on the end face of the housing 300 away from the drive motor 500, as... Figure 15 As shown, the outer surface of the ring 1340 is provided with a groove 1341, such as... Figure 14 As shown, several rods 1350 are fixedly installed on the ends of several connecting plates 1330 away from the first gear 1310. The rods 1350 are slidably installed on the inner wall of the groove 1341. When several second columns 700 rotate with the first column 600 about its central axis, the connecting plates 1330 drive the rods 1350 to slide along the inner wall of the groove 1341. Because, as... Figure 15As shown, the groove 1341 consists of a large circular arc groove and a small circular arc groove. The large and small circular arc grooves are located at the same center, and the center coincides with the rotation center of the first column 600. The small circular arc groove is located on the side of the ring 1340 near the artificial joint 1100, and the large circular arc groove is located on the other side of the ring 1340. The radius of the large circular arc groove is R, and the radius of the small circular arc groove is r. When the rod 1350 slides in the large circular arc groove with radius R, as... Figure 8 As shown, the three second pillars 700 near the opening of the housing 300 are in the first state, and the remaining second pillars 700 are in the second state.

[0064] To protect the driver component 1300, such as Figure 1 As shown, a protective cover 1800 is installed at the end of the housing 300 away from the drive motor 500 via a threaded connection. The drive assembly 1300 is disposed inside the protective cover 1800 to prevent dust and foreign objects from entering the drive assembly 1300.

[0065] To ensure that the abrasive particles are correctly compressed and enter the contoured flow channel 1600, such as... Figure 6 , Figure 8 and Figure 9 As shown, a first partition 800 is fixedly installed on the top wall of the cavity of the housing 300. A rotating shaft is rotatably installed between the inner walls of opposite ends of the cavity of the housing 300. A second partition 900 is fixedly installed on the outer surface of the rotating shaft. Because the bottom of the first partition 800 abuts against the outer circumference of the first column 600, the bottom of the second partition 900 abuts against the outer circumference of the first column 600, and the outer surface of the rotating shaft is flush with the top wall of the cavity of the housing 300, the rotation is achieved through the first partition 800 and the second partition 900. A second cavity 1700 is formed between the cavity of the housing 300 and the cavity of the housing 300. The second cavity 1700 isolates the space of the housing 300 cavity near the contoured flow channel 1600, so that the abrasive flow is also isolated and can only flow into the contoured flow channel 1600 from the inlet end of the contoured flow channel 1600. At the same time, by setting the second cavity 1700, when the second column 700 switches from the second state to the first state, because there is no abrasive flow inside the second cavity 1700, no abrasive flow will enter the interior of the circular groove 610.

[0066] By having the bottom of the first partition 800 abut against the outer circumferential surface of the first column 600, the abrasive particles on the circumferential surfaces of the first column 600 and the outer circumferential surfaces of the second column 700, which are about to enter the second cavity 1700, can be scraped and prevented from entering the second cavity 1700. To ensure that the bottom of the second partition 900 abuts against the outer circumferential surface of the first column 600, as follows... Figure 7As shown, a torsion spring 1400 is sleeved on the outer surface of the housing 300 at one end of the rotating shaft near the drive motor 500 on the second partition 900. The torsion spring 1400 is fixedly connected to the outer surface of the housing 300 at one end of the rotating shaft near the drive motor 500. The other end of the torsion spring 1400 is fixedly connected to the outer surface of the rotating shaft. The torsion spring 1400 causes the bottom of the second partition 900 to abut against the outer circumferential surface of the first column 600, preventing the abrasive particles from flowing into the second cavity 1700 from one side of the second partition 900.

[0067] When the second column 700 squeezes out the air from the abrasive stream in the first state, in order to prevent air from re-entering the abrasive stream, such as Figure 10 and Figure 11 As shown, the first column 600 has a circular hole 620 inside, such as... Figure 6 As shown, a rotary joint 1200 is rotatably mounted on the other end of the first column 600. The rotary joint 1200 is connected to the circular hole 620 and is connected to an external vacuum pump, so that the inside of the circular hole 620 is in a negative pressure state. Furthermore, multiple slots are equidistantly opened in the circumferential direction of the inner wall of the circular hole 620. The multiple slots are respectively connected to several circular grooves 610. Plates 1000 are slidably inserted into the inner walls of the multiple slots. Figure 13 As shown, an exhaust groove 1010 is formed on the outer surface of one side of the plate 1000. One end of the exhaust groove 1010 near the circular hole 620 penetrates the outer surface of the plate 1000 and communicates with the circular hole 620. A tension spring 1020 is fixedly connected to the outer surface of the plate 1000 at the circular hole 620. The other end of the tension spring 1020 is fixedly connected to the inner wall of the circular hole 620. The tension spring 1020 connects the circular hole 620 and the circular groove 610 on the plate 1000 through the exhaust groove 1010. Furthermore, as... Figure 12 As shown, the outer circumferential surface of the second column 700 is provided with an arc surface 710, and a first cavity 1500 is formed between the arc surface 710 and the circular groove 610. Therefore, the first cavity 1500 is connected to the circular hole 620 through the exhaust groove 1010. When the second column 700 is in the first state, the first cavity 1500 is also in a negative pressure state.

[0068] When the second column 700 is in the first state, while it is compressing the abrasive stream, it also pushes the abrasive stream along with the rotation of the first column 600. The abrasive stream is a paste-like fluid with poor flowability. When the second column 700 pushes it, because the abrasive behind it cannot flow quickly to replenish it, such as... Figure 8 As shown, this creates a gap on the back side of the second column 700 in the direction of rotation (e.g. Figure 8 (The black shaded area in the image). This gap is under negative pressure, which allows air inside the compressed abrasive grains to easily escape into the gap. Simultaneously, when... Figure 8 When the second column 700 starts to rotate to the second state, at a certain instant, because the arc surface 710 is about to rotate to the outside of the circular groove 610, it will open the gap of the first cavity 1500, so that the gap will be connected to the first cavity 1500. Since the first cavity 1500 is connected to the circular hole 620 through the exhaust groove 1010, the air inside the gap will be drawn away by the negative pressure pump, so that the air squeezed out of the abrasive flow will no longer continue to enter the abrasive flow.

[0069] In order to ensure that the first partition 800 can scrape away the abrasive particles on the surface of the second column 700 after it switches to the second state, without obstructing the first partition 800, as follows: Figure 8 As shown, the radius of the arc surface 710 is the same as the radius of the first column 600, so that the arc surface 710 and the outer circumferential surface of the first column 600 are flush. Furthermore, the arc surface 710 allows the second column 700 to abut against the bottom of the plate 1000 when switching to the second state, thereby pushing the plate 1000 into the interior of the circular hole 620. Figure 13 As shown, the exhaust groove 1010 is not through the bottom of the plate 1000. The purpose is to completely seal the slot when the plate 1000 is pushed into the inside of the round hole 620, so as to prevent the round hole 620 from leaking air in a vacuum state.

[0070] Because the sides of the artificial joint 1100 also need polishing during the polishing process, there is a gap between the two side plates 400 and the sides of the artificial joint 1100. This gap connects to the contour flow channel 1600. During prolonged polishing of the artificial joint 1100, operators discovered that the abrasive flow slowed down as it passed through the contour flow channel 1600 and into the gap on the side. This resulted in the sides of the artificial joint 1100 not being polished as thoroughly as the top surface within the same timeframe. Therefore, as... Figure 5 As shown, the lower constraint member 200 has two through holes 210 on its end face near the housing 300, as... Figure 4As shown, the contoured flow channel 1600 is connected to the cavity of the housing 300 through two through holes 210. When the abrasive flow is compressed, some of it enters the gaps on the side of the artificial joint 1100 through the two through holes 210, thus polishing the side of the artificial joint 1100 and preventing uneven polishing. However, because some abrasive flow also flows in from the inlet of the contoured flow channel 1600 when it enters through the two through holes 210, the two abrasive flows suddenly converge, causing jet deflection in the convergence area (when the flow / pressure of the two flows is unbalanced, the stronger flow will compress the weaker flow, forcing the mainstream direction to deflect). This results in a significant increase in material removal in the area swept by the jet deflection, leading to uneven polishing. To avoid the sudden convergence of the two abrasive flows, as... Figure 3 and Figure 5 As shown, the lower constraint member 200 has two baffles 220 fixedly installed on its outer surface near the two through holes 210. The two baffles 220 are disposed inside the contoured flow channel 1600. The baffles 220 are arranged parallel to the tangent of the artificial joint 1100 and are positioned above the two through holes 210. The two baffles 220 separate the abrasive flow entering from the two through holes 210 from the abrasive flow entering from the inlet end of the contoured flow channel 1600, preventing them from suddenly intersecting. They gradually intersect as the subsequent flow continues, thereby avoiding jet deflection in the intersection area and ensuring the uniformity of polishing of the artificial joint 1100.

[0071] In this embodiment, it should be noted that during the production of the first column 600 and the second column 700, the surfaces must be guaranteed to have mirror smoothness and undergo hardening treatment. After hardening, the surface finish is less than Ra0.2, which ensures that the abrasive flow will not stick to the surfaces of the first column 600 and the second column 700, and that the abrasive flow will not cause the first column 600 and the second column 700 to wear out quickly.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A stainless steel artificial joint polishing device for polishing the surface (1101) of an artificial joint (1100), characterized in that, include: An upper constraint (100) and a lower constraint (200) are provided, and a contoured flow channel (1600) is formed between the upper constraint (100) and the lower constraint (200). The contoured flow channel (1600) is provided with an inlet end and an outlet end and is used for the flow of abrasive particles. The artificial joint (1100) is disposed in the contoured flow channel (1600). A housing (300) is provided on the outer surface of the upper constraint member (100) and the lower constraint member (200), and the housing (300) has a cavity inside, and the inlet end of the contoured flow channel (1600) is connected to the cavity; The first column (600) is disposed inside the cavity of the housing (300). The first column (600) is configured to rotate around its central axis. A plurality of circular grooves (610) are uniformly opened on the outer circumference of the first column (600). A plurality of second pillars (700) are respectively disposed in a plurality of circular grooves (610), and the plurality of second pillars (700) are coupled to a first pillar (600); the second pillars (700) have a first state and a second state, the first state being configured such that when the outer surface of the second pillar (700) protrudes from the outer surface of the first pillar (600), the second pillar (700) can squeeze the abrasive flow through the rotation of the first pillar (600); the second state being configured such that when the outer surface of the second pillar (700) is flush with the outer surface of the first pillar (600), the second pillar (700) stops squeezing the abrasive flow. A drive assembly (1300) is disposed on the outer surface of the housing (300) for coupling a plurality of the second columns (700) and the first column (600).

2. The stainless steel artificial joint polishing device according to claim 1, characterized in that, Two side plates (400) are symmetrically fixed on the outer surfaces of the upper constraint member (100) and the lower constraint member (200) on opposite sides.

3. The stainless steel artificial joint polishing device according to claim 2, characterized in that, A drive motor (500) is fixedly mounted on the outer surface of one of the two side plates (400). The output end of the drive motor (500) passes through the outer surface of the side plate (400). The end of the first column (600) near the drive motor (500) passes through the outer surface of the housing (300) and is fixedly connected to the output end of the drive motor (500). The rotation center of the output end of the drive motor (500) is coaxially set with the rotation center of the first column (600).

4. The stainless steel artificial joint polishing device according to claim 3, characterized in that, A protective cover (1800) is installed at the end of the housing (300) away from the drive motor (500). The drive assembly (1300) is disposed inside the protective cover (1800). The drive assembly (1300) includes: A plurality of first gears (1310) are provided, and the end of the first column (600) away from the drive motor (500) passes through the outer surface of the housing (300). The plurality of first gears (1310) are rotatably disposed on the end face of the first column (600) and are arranged at equal intervals. A plurality of second gears (1320) are rotatably disposed on the end face of the first column (600) and respectively mesh with a plurality of first gears (1310). One end of a plurality of second columns (700) passes through the end face of the first column (600) and is coaxially fixed with a plurality of second gears (1320). Several connecting plates (1330) are respectively fixed on the outer surface of several first gears (1310); A ring (1340) is fixed to the end face of the housing (300) away from the drive motor (500), and a groove (1341) is formed on the outer surface of the ring (1340). Several rods (1350) are fixedly mounted on one end of several connecting plates (1330) away from the first gear (1310), and the rods (1350) are slidably installed in the groove (1341).

5. A stainless steel artificial joint polishing device according to claim 4, characterized in that, The groove (1341) includes a large circular arc groove and a small circular arc groove. The center of the large circular arc groove and the center of the small circular arc groove coincide with the rotation center of the first column (600). The small circular arc groove is located on the side of the ring (1340) near the artificial joint (1100), and the large circular arc groove is located on the other side of the ring (1340).

6. A stainless steel artificial joint polishing device according to claim 3, characterized in that, A first partition (800) is fixedly provided on the top wall of the cavity of the housing (300). The bottom of the first partition (800) abuts against the outer circumferential surface of the first column (600). A rotating shaft is rotatably installed between the inner walls of opposite ends of the cavity of the housing (300). A second partition (900) is fixedly installed on the outer surface of the rotating shaft. The bottom of the second partition (900) abuts against the outer circumferential surface of the first column (600). The outer surface of the rotating shaft is flush with the top wall of the cavity of the housing (300). A second cavity (1700) is formed between the first partition (800), the second partition (900), and the cavity of the housing (300).

7. A stainless steel artificial joint polishing device according to claim 6, characterized in that, One end of the rotating shaft near the drive motor (500) passes through the outer surface of the housing (300) and is fitted with a torsion spring (1400). One end of the torsion spring (1400) is fixedly connected to the outer surface of the housing (300), and the other end of the torsion spring (1400) is fixedly connected to the outer surface of the rotating shaft.

8. A stainless steel artificial joint polishing device according to claim 1, characterized in that, The first column (600) has a circular hole (620) inside. A rotary joint (1200) is rotatably installed at the other end of the first column (600). The rotary joint (1200) is connected to the circular hole (620). Multiple slots are equidistantly opened in the circumferential direction of the inner wall of the circular hole (620). The multiple slots are respectively connected to several circular grooves (610). A plate (1000) is slidably inserted into the inner wall of the multiple slots. An exhaust groove (1010) is opened on the outer surface of one side of the plate (1000). One end of the exhaust groove (1010) near the circular hole (620) passes through the outer surface of the plate (1000) and is connected to the circular hole (620). A tension spring (1020) is fixedly connected to the outer surface of the plate (1000) at the circular hole (620). The other end of the tension spring (1020) is fixedly connected to the inner wall of the circular hole (620).

9. A stainless steel artificial joint polishing device according to claim 8, characterized in that, The outer circumferential surface of the second column (700) is provided with an arc surface (710), the radius of which is the same as that of the first column (600). A first cavity (1500) is formed between the arc surface (710) and the circular groove (610), and the first cavity (1500) is connected to the circular hole (620) through the exhaust groove (1010).

10. A stainless steel artificial joint polishing device according to claim 1, characterized in that, The lower constraint member (200) has two through holes (210) on its end face near the housing (300). The contoured flow channel (1600) is connected to the cavity of the housing (300) through the two through holes (210). Two baffles (220) are fixedly installed on the outer surface of the lower constraint member (200) near the two through holes (210). The two baffles (220) are located inside the contoured flow channel (1600) and above the two through holes (210).

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