CN215920138U - Clamp apparatus - Google Patents

Abstract

The utility model relates to a clamp which is used for clamping a medical workpiece with a fixed column, wherein the clamping surface of the medical workpiece comprises an inner top surface, a first inner side surface and a second inner side surface which are positioned at two ends of the inner top surface and extend in the same direction, and the fixed column is arranged on the inner top surface and extends in the same direction with the first inner side surface and the second inner side surface, and the clamp is characterized by comprising a base, wherein a clamping mechanism is arranged on the base, and the clamping mechanism comprises: the first positioning mechanism comprises an inner cavity for limiting the fixed column to move; the second positioning mechanism and the third positioning mechanism are positioned on two sides of the first positioning mechanism and are respectively used for being abutted against the first inner side face and the second inner side face. When the clamp is used for clamping the medical workpiece, three positions of the medical workpiece can be quickly positioned, and the reliability of the medical workpiece during processing is ensured.

Description

Clamp apparatus

Technical Field

The utility model relates to the field of machining, in particular to a clamp which is used for clamping a medical workpiece with a fixed column in the machining process.

Background

Currently, artificial knee joint prostheses are mainly classified into femoral condyle prostheses and tibial plateau prostheses. The basic structure of the femoral condyle prosthesis is shown in fig. 1. Specifically, the femoral condyle prosthesis comprises a first surface 1 and a second surface 2 which are opposite, wherein the first surface 1 is a convex joint surface and is used for being in contact with and moving relative to the artificial meniscus component, the second surface 2 is provided with a fixing column 3, and the second surface 2 is connected with the cut femoral end under the cooperation of the fixing column 3. Since the first surface 1 needs to be in contact with the artificial meniscus component and to generate a relative movement, the first surface 1 is required to have a high smoothness.

For this reason, it is necessary to polish the femoral condyle prosthesis after its formation to improve the smoothness of the first surface 1.

However, the polishing process (i.e. manual polishing) generally performed by manually holding the femoral condyle prosthesis has the following problems:

1. clamping is not firm or excessive, because clamping force depends on manual work of workers, clamping states of different workers or the same worker in different time periods are not uniform, product clamping is easily excessive to influence machining size, and even parts fly out of the machining process to cause product scrapping or machine damage.

2. The manual clamping operation of operating personnel all the time, efficiency is relatively low, also is not favorable to staff physical and mental health.

SUMMERY OF THE UTILITY MODEL

Based on the above, the utility model aims to provide a clamp which is used for clamping a medical workpiece (such as a femoral condyle prosthesis) with a fixed column in a machining process, is firm and reliable in clamping and high in positioning precision, can improve the machining quality and the machining efficiency of the medical workpiece, and reduces the labor intensity of workers.

The utility model provides an anchor clamps for the medical work piece that the clamping has the fixed column, the clamping surface of medical work piece includes interior top surface, is located first medial surface and the second medial surface of interior top surface both ends and syntropy extension, the fixed column set up in interior top surface and with first medial surface and second medial surface syntropy extension, its characterized in that, anchor clamps include the base, be equipped with clamping mechanism on the base, clamping mechanism includes: the first positioning mechanism comprises an inner cavity for limiting the fixed column to move; the second positioning mechanism and the third positioning mechanism are positioned on two sides of the first positioning mechanism and are respectively used for being abutted against the first inner side face and the second inner side face.

When the clamp is used for clamping a medical workpiece, the first positioning mechanism comprises an inner cavity for limiting the fixed column to move; the second positioning mechanism and the third positioning mechanism are positioned on two sides of the first positioning mechanism and are respectively used for abutting against the first inner side face and the second inner side face, so that three positions of the medical workpiece are quickly positioned, and the reliability of the medical workpiece during machining is ensured.

In one embodiment, the first positioning mechanism comprises an elastic jacket, a jacket fixing member and a first driving unit, the elastic jacket is provided with a first inner cavity used for accommodating the fixing column, the jacket fixing member is provided with a second inner cavity used for accommodating the elastic jacket, and the first driving unit is configured to drive the elastic jacket and the jacket fixing member to move relatively, so that the elastic jacket is pressed by the cavity wall of the second inner cavity to shrink the first inner cavity for clamping the fixing column.

In one embodiment, the second positioning mechanism includes a pushing block movably disposed on one side of the first positioning mechanism, and a second driving unit configured to drive the pushing block away from the first positioning mechanism to push the pushing block against the first inner side surface.

In one embodiment, the third positioning mechanism includes a pressing block adjustably disposed on the base and located on a side of the first positioning mechanism facing away from the second positioning mechanism, and a third driving unit configured to drive the pressing block to move away from the first positioning mechanism so that the pressing block abuts against the second inner side surface.

In one embodiment, the jacket fixing member is fixed to the base, a first end of the elastic jacket is connected to the first driving unit to move under the driving of the first driving unit, and a second end of the elastic jacket is provided with the first inner cavity.

In one embodiment, the second driving unit includes an elastic member disposed between the push block and the base.

In one embodiment, the second driving unit includes a slider, the slider is slidably disposed on the base, a sliding direction of the slider intersects with a moving direction of the pushing block, and the slider is configured to drive the pushing block away from the first positioning mechanism.

In one embodiment, the push block is provided with an inclined sliding groove, the extending direction of the inclined sliding groove is intersected with the moving direction of the push block, the sliding block is provided with an inclined convex block embedded into the inclined sliding groove, and the shape of the inclined convex block is matched with that of the inclined sliding groove.

In one embodiment, the second driving unit further includes an inclined ejecting block, the inclined ejecting block is disposed on one side of one end portion of the slider, an inclined surface is disposed on one side of the inclined ejecting block, which faces the slider, a pushed surface attached to the inclined surface is disposed on the slider, and the pushed surface is matched with the inclined surface.

In one embodiment, the base is provided with a supporting portion, the push block, the sliding block and the inclined ejecting block are all connected with the supporting portion, the inclined ejecting block is connected with a positioning rod, the positioning rod penetrates through the supporting portion, a baffle is arranged on the positioning rod, an elastic piece in a compression state is arranged between the baffle and the supporting portion, and the elastic piece is fixedly connected with the positioning rod.

In one embodiment, the third driving unit includes an adjusting screw, the pressing block is provided with a through threaded hole, the adjusting screw is matched with the threaded hole, and the tail of the adjusting screw abuts against the base.

In one embodiment, two or more clamping mechanisms are disposed on the base.

Drawings

Fig. 1a and 1b are schematic views of different angles of the femoral condyle prosthesis, respectively.

Fig. 2 is a schematic structural diagram of a clamp according to an embodiment.

Fig. 3 is a schematic view of another angle of the fixture shown in fig. 2.

Fig. 4 is a schematic structural diagram of a clamp according to an embodiment, in which a part of a base is hidden to show an internal structure of the clamp, and only one clamping mechanism is shown in the figure.

Fig. 5 is a schematic structural view of the jig shown in fig. 4, with schematic sliders omitted.

Fig. 6 and 7 are schematic structural diagrams of different angles of the oblique convex block of the slider.

Fig. 8 is a schematic structural view of the clamp for clamping a medical workpiece according to an embodiment.

Fig. 9 is a schematic view of another angle of the clamp shown in fig. 8.

Fig. 10 is a top view of the fixture of fig. 9.

Fig. 11 is a cross-sectional view a-a of the fixture of fig. 10.

Fig. 12 is a B-B sectional view of the clip of fig. 10.

The relevant elements in the figures are numbered correspondingly as follows:

1. a first surface; 2. a second surface; 21. an inner top surface; 22. a first inner side; 23. a second inner side; 3. fixing a column; 100. a clamp; 10. a base; 110. a support portion; 111. a guide groove; 20. a first positioning mechanism; 210. an elastic jacket; 211. a first lumen; 220. a jacket fixing member; 221. a second lumen; 230. a drive unit; 30. a second positioning mechanism; 310. a push block; 311. an inclined chute; 320. a second driving unit; 321. a slider; 3211. an oblique projection; 3212. a pushed surface; 322. a slanted ejecting block; 3221. a bevel; 323. positioning a rod; 324. a baffle plate; 325. an elastic member; 40. a third positioning mechanism; 410. a pressing block; 411. a threaded hole; 420. fastening screws; 430. and adjusting screws.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

As shown in fig. 2 to 5, an embodiment of the present invention provides a jig 100, and the jig 100 is used for clamping a medical workpiece having a fixing column 3 as shown in fig. 1, so as to perform machining such as polishing on the medical workpiece. The medical workpiece described herein may be a medical joint prosthesis, such as a femoral condyle prosthesis, or other similar medical workpieces. Referring to fig. 1a and 1b, the clamping surface (i.e., the second surface 2) of the medical workpiece specifically includes an inner top surface 21, a first inner side surface 22 and a second inner side surface 23 located at two ends of the inner top surface 21 and extending in the same direction, and the fixing post 3 is disposed on the inner top surface 21 and extends in the same direction as the first inner side surface 22 and the second inner side surface 23, where the extending in the same direction refers to being located on the same side of the inner top surface 21 (refer to the same side of the front and back sides of a plane).

As shown in fig. 2 to 5, the clamp 100 includes a base 10, and a clamping mechanism is provided on the base 10. The clamping mechanism comprises a first positioning mechanism 20, a second positioning mechanism 30 and a third positioning mechanism 40, wherein the first positioning mechanism 20 is used for locking a fixing column 3 on the inner top surface 21 of the medical workpiece, the second positioning mechanism 30 and the third positioning mechanism 40 are positioned on two sides of the first positioning mechanism 20 and are respectively used for abutting against a first inner side surface 22 and a second inner side surface 23, so that the clamp 100 locks the medical workpiece through three positions, balanced and stable clamping force can be provided for the medical workpiece, the subsequent processing quality is ensured, and the situation that the medical workpiece flies out to hurt people in the processing process is avoided. In particular, two sets of clamping mechanisms can be arranged on the base 10, and two medical workpieces can be clamped simultaneously, as shown in fig. 8 and 9, so that the processing efficiency is improved. As described in detail below.

Referring to fig. 4, 5, 10 to 12, the first positioning mechanism 20 includes an elastic collet 210, a collet fixing member 220, and a driving unit 230. The jacket fixing member 220 is fixedly connected to the base 10 (or integrated with the base 10), a first end of the elastic jacket 210 is connected to a driving end of the driving unit 230, and the elastic jacket 210 can be driven by the driving unit 230 to lift relative to the jacket fixing member 220. The second end of the elastic collet 210 has a first inner cavity 211, and the first inner cavity 211 is used for accommodating the fixing column 3. The collet fixture 220 has a second inner cavity 221, and the second inner cavity 221 is used for accommodating the elastic collet 210.

In one example, the second end of the elastic jacket 210 has an inverted cone structure, i.e., the cross section of the elastic jacket gradually increases from the first end to the second end. And the side wall of the second end is provided with a cut penetrating the end face, that is, the side wall forms a plurality of mutually separated parts arranged along the circumferential direction at the second end, so that the second end of the elastic jacket 210 can be compressed or expanded. It should be noted that the cut-out may not be provided here as long as the second end of the elastic collet 210 can be compressed or expanded, for example, the material of the elastic collet 210 has elasticity. The shape of the second inner cavity 221 of the collet fixture 220 is matched with the shape of the second end of the elastic collet 210, and the second inner cavity 221 is slightly smaller than the size of the second end of the elastic collet 210 in a natural state. As shown in fig. 4, the driving unit 230 is a cylinder, and the elastic collet 210 is coupled to a piston rod of the cylinder. The driving unit 230 may also be other power units, such as an electric push rod. In other embodiments, the second end may have other shapes, such as a cylindrical shape, as long as the second inner cavity 221 is slightly smaller than the size of the second end of the elastic jacket 210 in the natural state, and the second end can be compressed or expanded. When the second end is the back taper structure, can have sufficient space and be used for holding fixed column 3, and its external dimension that enlarges gradually is pressed from both sides tightly by pressing from both sides cover mounting 220 easily, is difficult for the landing. Furthermore, the reverse tapered structure is smoothly transited to the first end, and can smoothly move toward the second end when driven by the driving unit 230.

It will be readily appreciated that, in addition to the above-described clamping of the fixing post 3 by contraction of the elastic collet 210, there are other ways to restrict the movement of the fixing post 3, such as replacing the elastic collet 210 with two half-shells that wrap around the fixing post 3, and gradually locking the two half-shells from the sides with bolts. The two half-piece clamp sleeves can be understood as dividing the circular cylinder into a left half and a right half, and the inner part of the circular cylinder is an inner cavity for limiting the movement of the fixed column.

In actual use, referring to fig. 4 and 11, the fixing post 3 is inserted into the first inner cavity 211 of the elastic collet 210, and the elastic collet 210 is accommodated in the second inner cavity 221. When the driving unit 230 drives the elastic collet 210 to move upward to a predetermined position of the second inner cavity 221, the cavity wall of the second inner cavity 221 presses the elastic collet 210, so that the friction between the elastic collet 210 and the fixing post 3 is increased, and the elastic collet 210 can clamp the fixing post 3. It should be noted that, at the "predetermined position", the diameter of the second inner cavity 221 is smaller than the outer diameter of the elastic jacket 210, so that the two are tightly fitted. After the medical workpiece is processed, the driving unit 230 drives the elastic collet 210 to move downward, so that the elastic collet 210 is loosened, and then the medical workpiece can be removed. The clamping mode can be realized through the relative movement of the two elements, is simple and is beneficial to improving the clamping efficiency.

In addition, in other embodiments, the elastic jacket 210 may be kept still and the pushing element may move, or the pushing element and the elastic jacket 210 may move towards each other at the same time.

It can be understood that in the embodiment of the present invention, the number of the elastic clamping sleeves 210 in the clamp 100 is the same as that of the second inner cavities 221, and the number of the elastic clamping sleeves 210 can be set according to the number of the fixing posts 3 on the medical workpiece to be processed. For example, when one fixing post 3 is provided on the medical workpiece, the number of the elastic collet 210 is at least one, and when two fixing posts 3 are provided on the medical workpiece 1, the number of the elastic collet 210 is at least two. Referring to fig. 1 and 4, in an example, two fixing posts 3 are provided on the medical workpiece, and two elastic collet 210 and two collet fixing members 220 having a second inner cavity 221 are provided in the clamp 100. Meanwhile, the arrangement of the two elastic jackets 210 is matched with the arrangement of the two fixed columns 3, and the cross sections of the fixed columns 3, the elastic jackets 210, the first inner cavities 211 and the second inner cavities 221 in the axial direction perpendicular to the fixed columns 3 can be all circular, in other embodiments, the cross sections can also be elliptical, oval and the like, preferably, the cross sections of the fixed columns 3 and the first inner cavities 211 are the same, and the cross sections of the elastic jackets 210 and the second inner cavities 221 are the same, but the two groups can be the same or different. In particular arrangements, the two collet fixtures 220 may be connected to each other and then assembled together to the base 10.

As shown in fig. 4 and 5, the second positioning mechanism 30 includes a pushing block 310 and a second driving unit 320, wherein the pushing block 310 is movably disposed on one side of the elastic jacket 210, and the second driving unit 320 is configured to drive the pushing block 310 to move to abut against the first inner side 22 of the medical workpiece (as shown in fig. 11). In a specific arrangement, the supporting portion 110 is disposed on the base 10 to facilitate installation of the pushing block 310 and the second driving unit 320.

In a specific embodiment, the second driving unit 320 includes a slider 321, the slider 321 is slidably disposed on the supporting portion 110 of the base 10, and a sliding direction of the slider 321 intersects with a moving direction of the push block 310. Preferably, the sliding direction of the sliding block 321 is perpendicular to the moving direction of the pushing block 310. For example, referring to fig. 4, the supporting portion 110 is provided with a guide slot 111, and the moving direction of the pushing block 310 is the direction indicated by arrow X (or the opposite direction) under the constraint of the guide slot 111; the sliding direction of the slider 321 is the direction indicated by the arrow Y (or the opposite direction), and the direction Y and the direction X are perpendicular to each other. By setting the sliding direction of the slider 321 to be perpendicular to the moving direction of the push block 310, it is advantageous to reduce the volume of the jig 100 by converting the moving direction. For example, in practice, more than two sets of clamping mechanisms may be provided in the sliding direction Y of the slider 321, and the moving direction of the push block 310 in the two sets of clamping mechanisms is along the X direction, so that the clamp 100 only has a relatively long dimension in the sliding direction Y of the slider 321, and the dimension of the clamp 100 in the moving direction X of the push block 310 is not increased compared with the case where one set of clamping mechanism is provided.

As shown in fig. 4 to 7, the push block 310 is provided with an inclined sliding slot 311, the inclined sliding slot 311 extends in a direction away from the elastic jacket 210 along a direction indicated by an arrow Y, and an extending direction of the inclined sliding slot 311 intersects with a moving direction X of the push block 310. The bottom of the sliding block 321 is provided with an inclined protrusion 3211 matched with the inclined sliding groove 311. Specifically, if a horizontal plane is taken as a reference plane, the extending direction of the inclined sliding chute 311 and the moving direction Y of the pushing block 310 are both parallel to the horizontal plane, but the extending direction of the inclined sliding chute 311 intersects with the moving direction X of the pushing block 310. In actual use, referring to fig. 4, 5 and 11, the inclined protrusion 3211 on the sliding block 321 is embedded into the inclined sliding slot 311 on the pushing block 310 and attached to the groove wall of the inclined sliding slot 311. When the sliding block 321 moves along the Y direction, the oblique protrusion 3211 applies a force to the groove wall of the oblique sliding groove 311 while moving along the Y direction, and then the pushing block 310 moves along the X direction and abuts against the first inner side surface 22 of the medical workpiece under the constraint of the guide groove 111.

In the above embodiment, the inclined protrusion 3211 at the bottom of the sliding block 321 is embedded in the inclined sliding slot 311 of the pushing block 310, in other embodiments, the sliding block 321 may be located on one side of one end of the pushing block 310, an inclined surface is provided on the sliding block 321, the pushing block 310 is provided with an inclined surface matching with the sliding block 321, and when the sliding block 321 moves along the Y direction, the pushing block 310 is pushed to move toward the first inner side surface 22 of the medical workpiece.

Referring to fig. 4 and 5, in order to facilitate the movement of the driving slider 321, the second driving unit 320 further includes a lifter block 322 and an adjustment structure. The adjustment structure can drive the sliding block 321 to move through the inclined ejecting block 322, and then drive the pushing block 310 to move, so that the pushing block 310 abuts against the first inner side surface 22 of the medical workpiece.

Specifically, the lifter block 322 is disposed on the supporting portion 110 and is disposed at one side of one end portion of the slider 321, and a slope 3221 is disposed at one side of the lifter block 322 facing the slider 321; the slider 321 is provided with a pushed surface 3212 jointed with the inclined surface 3221, and the pushed surface 3212 is matched with the inclined surface 3221. The adjustment structure includes a positioning rod 323, a baffle 324, and an elastic member 325. One end of the positioning rod 323 is connected to the bottom of the slanted ejecting block 322, the other end of the positioning rod 323 passes through the supporting portion 110 and is provided with the baffle 324, and the elastic member 325 is arranged between the baffle 324 and the supporting portion 110 and is in a compressed state. Meanwhile, the elastic member 325 is fixedly connected to the positioning rod 323. Preferably, the elastic member 325 is a spring. The elastic member 325 is in a compressed state and fixedly connected with the positioning rod 323, so that the elastic member 325 can transmit elastic force to the inclined ejecting block 322 through the positioning rod 323, and the inclined ejecting block 322 extrudes the pushing block 310 through the sliding block 321, so that the pushing block 310 can automatically abut against the first inner side surface 22 of the medical workpiece, and self-locking is realized.

Further, the elastic member 325 is detachably provided with the barrier 324. In particular arrangements, the ends of the resilient members 325 abut the baffle 324 but are not secured to the baffle 324. Therefore, when the second positioning mechanism 30 is used for positioning a medical workpiece, the pressing force of the inclined ejecting block 322 on the sliding block 321 can be adjusted by adjusting the elastic force of the elastic member 325 on the inclined ejecting block 322, so as to ensure that the pushing block 310 can be tightly attached to the first inner side surface 22 of the medical workpiece. Specifically, the pressing force acting on the slider 321 can be adjusted by increasing or decreasing the spacers between the elastic member 325 and the baffle 324. For example, when the pressing force of the slanted ejecting block 322 on the sliding block 321 needs to be increased, a gasket may be added between the elastic member 325 and the baffle 324, so that the compression degree of the elastic member 325 is increased, and the elastic force transmitted by the elastic member 325 to the slanted ejecting block 322 through the positioning rod 323 is increased, so that the slanted ejecting block 322 tends to move closer to the supporting portion 110 (downward movement in fig. 5), and the pressing force of the inclined surface 3221 of the slanted ejecting block 322 on the pressed surface 3212 of the sliding block 321 is increased. The elastic member 325 may be provided in other manners as long as it can provide an upward pushing force to the slanted ejecting block 322.

In other embodiments, the adjusting structure comprises an adjusting member movably mounted on the other side of the supporting portion 110, and one end of the adjusting member abuts against the inclined top block 322. Specifically, the adjusting member may be a screw in threaded connection with the supporting portion 110, and the pressing force of the pushing block 310 on the first inner side surface 22 of the medical workpiece is adjusted by adjusting the tightness of the adjusting member. The adjustment member may be a pin axially movably provided to the support portion 110.

In other embodiments, the adjustment mechanism includes a power source configured to drive the movement of the slider 321. For example, the adjustment structure includes an electric push rod connected with the slider 321. The adjustment of the extrusion force of the push block 310 on the first inner side surface 22 of the medical workpiece is realized by controlling the extension and contraction of the electric push rod.

In other embodiments, the second driving unit 320 includes an elastic member disposed between the pushing block 310 and the base 10. Specifically, one end of the elastic element abuts against the base, and the other end abuts against the push block 3. The elasticity of the elastic piece enables the push block to move away from the elastic jacket, so that the push block can be tightly pressed against the first inner side surface 22 of the medical workpiece, and the self-locking function is also realized. Preferably, the elastic member is a spring.

As shown in fig. 3, 11 and 12, the third driving unit includes a pressing block 410 and a fastening screw 420, and the pressing block 410 is connected to the base 10 by the fastening screw 420. It is to be understood that the pressing block 410 is not limited to be coupled to the base 10 by the fastening screw 420, and may be coupled by a pin, for example.

When the clamp 100 is used for clamping a medical workpiece, after the fixing column 3 of the medical workpiece is placed in the first inner cavity 211 of the elastic jacket 210, the fixing column 3 of the medical workpiece can be clamped by controlling the elastic jacket 210 to ascend through the first driving unit 230; meanwhile, the first inner side surface 22 of the medical workpiece is positioned at the outer side (the side back to the elastic jacket 210) of the push block 310 of the second positioning mechanism 30, and the push block 310 of the second positioning mechanism 30 tightly pushes against the first inner side surface 22 of the medical workpiece; meanwhile, the second inner side surface 23 of the medical workpiece is located at the outer side (the side back to the elastic jacket 210) of the pressing block 410 of the third positioning mechanism 40, and the pressing block 410 of the third positioning mechanism 40 tightly pushes against the second inner side surface 23 of the medical workpiece, so that three positions of the medical workpiece are quickly positioned, and the processing reliability of the medical workpiece is ensured.

Further, the pressing block 410 is provided with a through threaded hole 411, and the third driving unit further includes an adjusting screw 430. The adjusting screw 430 is engaged with the threaded hole 411 and the tail of the adjusting screw 430 abuts against the base 10. In one embodiment, the pressing block 410 is a plate, and has four threaded holes 411. The number of the adjustment screws 430 is four. The adjusting screw 430 extends into the threaded hole 411 from a side of the pressing block 410 opposite to the elastic jacket 210, and the tail portion abuts against the base 10. After the adjusting screw 430 is installed in the threaded hole 411, the head of the adjusting screw 430 is lower than the surface of the pressing block 410, so as to avoid affecting the pressing block 410 to tightly press against the second inner side surface 23 of the medical workpiece. By adjusting the adjusting screw 430, the position of the pressing block 410 can be changed. Specifically, the adjusting screw 430 is rotated to enable the tail part of the adjusting screw to continuously push against the base 10, the adjusting screw 430 gives a counterforce to the pressing block 410, and fine adjustment of the position of the pressing block 410 in the direction away from the base 10 can be realized; the reverse is exactly true.

In practice, due to design or processing errors, sometimes the fixing posts 3 of the medical workpiece are not coaxial after being inserted into the elastic jacket 210, which causes deviation of the placement position of the medical workpiece. Four adjustment screws 430 may be adjusted to adjust the position of the extrusion block away from the resilient collet 210 (outward adjustment) or closer to the resilient collet 210 (inward adjustment). Then the medical workpiece is clamped again, so that the placement position of the medical workpiece is adjusted to the ideal position. Namely, the adjusting screw 430 can be used for adjusting the left and right position of the medical workpiece, so that the clamp 100 can be better attached to the medical workpiece, a stable and reliable positioning effect is realized, and the reliability of the medical workpiece during processing is further ensured.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (12)

1. The utility model provides an anchor clamps for the medical work piece that the clamping has the fixed column, the clamping surface of medical work piece includes interior top surface, is located first medial surface and the second medial surface of interior top surface both ends and syntropy extension, the fixed column set up in interior top surface and with first medial surface and second medial surface syntropy extension, its characterized in that, anchor clamps include the base, be equipped with clamping mechanism on the base, clamping mechanism includes:

the first positioning mechanism comprises an inner cavity for limiting the fixed column to move;

the second positioning mechanism and the third positioning mechanism are positioned on two sides of the first positioning mechanism and are respectively used for being abutted against the first inner side face and the second inner side face.

2. The clamp of claim 1, wherein the first positioning mechanism comprises an elastic collet having a first inner cavity for receiving the fixing post, a collet fixture having a second inner cavity for receiving the elastic collet, and a first driving unit configured to drive the elastic collet and the collet fixture to move relatively to each other to contract the first inner cavity by pressing the elastic collet with a cavity wall of the second inner cavity for clamping the fixing post.

3. The clamp of claim 1, wherein the second positioning mechanism comprises a push block movably disposed on one side of the first positioning mechanism, and a second driving unit configured to drive the push block away from the first positioning mechanism to push the push block against the first inner side surface.

4. The clamp of claim 1, wherein the third positioning mechanism includes a pressing block adjustably disposed on the base and located on a side of the first positioning mechanism facing away from the second positioning mechanism, and a third driving unit configured to drive the pressing block away from the first positioning mechanism to press the pressing block against the second inner side.

5. The clamp of claim 2, wherein the collet holder is fixed to the base, a first end of the elastic collet is connected to the first driving unit to move by the first driving unit, and a second end of the elastic collet is provided with the first inner cavity.

6. The clamp of claim 3, wherein the second drive unit comprises a resilient member disposed between the push block and the base.

7. The clamp of claim 3, wherein the second driving unit comprises a slider, the slider is slidably disposed on the base, a sliding direction of the slider intersects with a moving direction of the push block, and the slider is used for driving the push block away from the first positioning mechanism.

8. The clamp according to claim 7, wherein the push block is provided with an inclined sliding groove, the extending direction of the inclined sliding groove intersects with the moving direction of the push block, the sliding block is provided with an inclined convex block embedded into the inclined sliding groove, and the shape of the inclined convex block is matched with the shape of the inclined sliding groove.

9. The clamp according to claim 7, wherein the second driving unit further comprises an inclined ejecting block, the inclined ejecting block is arranged on one side of one end of the sliding block, an inclined surface is arranged on one side of the inclined ejecting block facing the sliding block, a pushed surface attached to the inclined surface is arranged on the sliding block, and the pushed surface is matched with the inclined surface.

10. The clamp of claim 9, wherein the base is provided with a support portion, the push block, the slide block and the inclined ejection block are all connected with the support portion, the inclined ejection block is connected with a positioning rod, the positioning rod passes through the support portion, a baffle is arranged on the positioning rod, an elastic member in a compressed state is arranged between the baffle and the support portion, and the elastic member is fixedly connected with the positioning rod.

11. The clamp according to claim 4, wherein the third driving unit comprises an adjusting screw, the pressing block is provided with a threaded hole therethrough, the adjusting screw is matched with the threaded hole, and the tail of the adjusting screw abuts against the base.

12. The clamp of claim 1, wherein two or more of said clamping mechanisms are provided on said base.

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