A clamp

Abstract

The utility model belongs to the medical instrument processing technical field discloses a kind of clamps. The clamp includes pedestal and multiple compression fittings, pedestal is equipped with accommodating groove, accommodating groove is used to accommodate workpiece to be processed, multiple compression fittings are ringed in accommodating groove, any compression fitting includes detachable connection fixed part and abutting part, fixed part is detachably connected with pedestal, abutting part can press workpiece to be processed in accommodating groove, fixed part is hard metal, and abutting part is soft metal. The clamp guarantees the fixed effect of compression fitting, reduces the damage to workpiece to be processed at the same time, and guarantees the quality of workpiece to be processed.

Description

Technical Field

[0001] This utility model relates to the field of medical device processing technology, and in particular to a clamp. Background Technology

[0002] In orthopedic clinical treatment, bone plates are a commonly used internal fixation device, mainly used for the reduction and fixation of fracture sites. By connecting and stabilizing the fracture ends, they provide a good mechanical environment for bone healing and promote smooth fracture healing. During the production, processing, or preparation for clinical application of bone plates, special clamps are often used to fix the bone plates to ensure the accuracy of subsequent processing or operations.

[0003] However, existing clamps for fixing bone plates have limited material options for their clamping components. When using hard metals (iron) as clamping components, while the stability of the structure can be ensured, the high hardness of the hard metal can easily cause indentations, scratches, or even cracks on the surface of the bone plate during contact and pressure application, affecting the performance and service life of the bone plate. On the other hand, when using soft metals (aluminum) as clamping components, although damage to the bone plate can be reduced, the low strength of soft metals makes the clamping components prone to deformation under long-term use or high pressure, resulting in a decrease in clamping force on the bone plate and failure to achieve firm fixation, which in turn affects the accuracy and reliability of subsequent operations. Utility Model Content

[0004] The purpose of this utility model is to provide a clamp that ensures the fixing effect of the pressed parts while reducing damage to the workpiece and ensuring the quality of the workpiece.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A clamp includes: a base and a plurality of pressing members. The base has a receiving groove for receiving a workpiece. The plurality of pressing members are arranged in a ring around the receiving groove. Each pressing member includes a fixing part and an abutting part that are detachably connected. The fixing part is detachably connected to the base. The abutting part is capable of pressing the workpiece into the receiving groove. The fixing part is made of hard metal and the abutting part is made of soft metal.

[0007] As an alternative to the clamp, the abutment is made of aluminum or titanium, and the material hardness of the abutment is lower than that of the fixing part.

[0008] As an alternative to the clamp, the fixing part is made of cast iron or carbon steel.

[0009] As an alternative to the clamp, one of the abutting part or the fixing part is provided with a T-shaped groove, and the other of the abutting part or the fixing part is provided with a T-shaped protrusion, which is inserted and engaged with the T-shaped groove.

[0010] As an alternative to the fixture, the contact surface of the abutting part is inclined away from the workpiece relative to the direction pointing towards the workpiece, so that the contact surface forms a line contact with the workpiece.

[0011] As an alternative to the fixture, the height of the workpiece is greater than or equal to the depth of the receiving groove.

[0012] As an alternative to the clamp, the clamp also includes a plurality of first fasteners, each of which corresponds to one of the pressing parts. Each of the fixing parts is provided with a first mounting hole, and the base is provided with a plurality of second mounting holes. The first fasteners pass through the corresponding first mounting holes and second mounting holes in sequence and are threadedly connected to the second mounting holes.

[0013] As an alternative to the clamp, the first mounting hole is an elongated hole provided along the extension direction of the fixing part.

[0014] As an alternative to the clamp, the clamp also includes multiple washers, with one washer provided between each of the first fastener and the fixing part.

[0015] As an alternative to the clamp, the base is provided with a handle groove that communicates with the receiving groove.

[0016] Beneficial effects:

[0017] This invention provides a clamp that effectively balances stability and processing protection by placing the workpiece in a receiving groove and using a pressing component composed of a detachably connected fixing part and a pressing part. The fixing part, made of hard metal, is detachably fixed to the periphery of the receiving groove, ensuring the overall structural stability and providing a reliable foundation for the workpiece. The pressing part, made of soft metal, reduces hard contact damage to the workpiece surface due to its material properties when pressing against it. This combination of hard and soft materials ensures clamping stability with the hard metal fixing part and reduces the risk of damage to the workpiece with the soft metal pressing part. Furthermore, the detachable connection structure allows for flexible adaptation to different processing needs, thereby improving the overall processing quality of the workpiece. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the clamp provided in this embodiment of the utility model;

[0019] Figure 2This is a first schematic diagram of the pressing component and the first fastener provided in this embodiment of the utility model;

[0020] Figure 3 This is a second schematic diagram of the pressing component and the first fastener provided in this embodiment of the utility model.

[0021] In the picture:

[0022] 100. Parts to be processed;

[0023] 1. Base; 11. Receiving groove; 12. Handle groove;

[0024] 2. Press-fit part; 21. Fixing part; 22. Abutting part; 211. T-slot; 212. First mounting hole; 221. T-shaped protrusion; 222. Abutting surface;

[0025] 3. First fastener. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0027] In the description of this utility model, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part of the device. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, the terms "upper" and "lower," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0030] This embodiment provides a clamp, such as Figures 1-3 As shown, the fixture includes a base 1 and a plurality of pressing parts 2. The base 1 is provided with a receiving groove 11 for receiving a workpiece 100. The plurality of pressing parts 2 are arranged in a ring around the receiving groove 11. Each pressing part 2 includes a fixing part 21 and an abutting part 22 that are detachably connected. The fixing part 21 is detachably connected to the base 1, and the abutting part 22 can press the workpiece 100 into the receiving groove 11. The fixing part 21 is made of hard metal, and the abutting part 22 is made of soft metal.

[0031] By placing the workpiece 100 in the receiving groove 11 and using the pressing member 2, which consists of a detachably connected fixing part 21 and a pressing part, a balance between fixing stability and processing protection is effectively achieved. The fixing part 21, made of hard metal, is detachably fixed to the periphery of the receiving groove 11, ensuring the overall structural stability and providing a reliable fixing foundation for the workpiece 100. The pressing part, made of soft metal, reduces hard contact damage to the surface of the workpiece 100 when pressing against it. This combination of hard and soft materials ensures clamping stability with the hard metal fixing part 21 and reduces the risk of damage to the workpiece 100 with the soft metal pressing part. Furthermore, the detachable connection structure allows for flexible adaptation to different processing needs, thereby improving the overall processing quality of the workpiece 100.

[0032] In this embodiment, the workpiece 100 to be processed is a bone plate, and the receiving groove 11 is adapted to the shape of the bone plate, which can form a precise pre-position of the bone plate and avoid errors caused by positional deviation during processing. In this embodiment, the number of pressing parts 2 can be flexibly adapted according to the specific shape and size of the bone plate, and is not specifically limited here.

[0033] In this embodiment, the abutment portion 22 is made of aluminum or titanium, and the material hardness of the abutment portion 22 is lower than that of the fixing portion 21. Aluminum and titanium themselves have good plasticity and toughness. As representatives of soft metals, when they come into contact with the workpiece 100 and apply pressure, they can buffer the pressure through a certain deformation, avoiding direct rigid impact on the surface of the workpiece 100 like hard metals. This minimizes damage such as indentations and scratches on the surface of the workpiece 100, effectively protecting the structural integrity and surface accuracy of the workpiece 100. At the same time, since the hardness of the abutment portion 22 is lower than that of the fixing portion 21, when the fixing portion 21 provides a stable clamping force through the hard metal material, the abutment portion 22 will not affect the overall fixing effect due to insufficient hardness.

[0034] The soft metal used for the contact part 22 typically has a low hardness, generally between 20-100 HB Brinell hardness. This range ensures that when in contact with the workpiece 100 (such as a bone plate), it forms a flexible contact through appropriate deformation, avoiding surface damage caused by excessive hardness. It also provides sufficient structural strength to achieve a stable pressing effect, meeting the functional requirements of auxiliary fixation. At the same time, it creates a significant hardness difference with the hard metal used for the fixing part 21, thus achieving a balance between overall fixing performance and protective effect.

[0035] In this embodiment, the fixing part 21 is made of cast iron or carbon steel, providing a solid and reliable structural support for the fixture. Cast iron has high hardness and good rigidity, with outstanding compressive strength. As the fixing part 21, it can stably bear the pressure transmitted by the pressure-bearing part and is not prone to deformation. Carbon steel (such as No. 45 steel), after quenching and tempering, not only has excellent rigidity but also strong wear resistance and fatigue resistance, maintaining structural stability during long-term repeated use. Since the fixing part 21 needs to be detachably fixed to the periphery of the receiving groove 11, its own high strength ensures a firm connection with the receiving groove 11, preventing loosening or displacement when clamping the workpiece 100, thus laying the foundation for the overall fixing effect of the fixture. Meanwhile, the hardness of cast iron and carbon steel is significantly higher than that of the soft metal used in the abutment part 22. This difference in hardness allows the fixing part 21 to provide a stable mounting reference and support for the abutment part 22. When the abutment part 22 presses against the workpiece 100, it can protect the workpiece with its soft properties and achieve reliable clamping by relying on the rigidity of the fixing part 21. Thus, while ensuring the fixation is firm, it works with the abutment part 22 to improve the processing quality of the workpiece 100.

[0036] The hard metal used for the fixing part 21 typically has a high hardness, generally between 150-300 HB Brinell hardness. This range meets the core requirements of the fixing part 21 for structural strength and rigidity, and can stably withstand the pressure transmitted by the abutment part 22 as well as the forces exerted during external operations, ensuring a stable structural state during long-term use or repeated clamping, and providing reliable support and a fixed foundation for the overall device.

[0037] In this embodiment, as Figure 2 and Figure 3 As shown, the fixing part 21 is provided with a T-shaped groove 211, and the abutting part 22 is provided with a T-shaped protrusion 221. The T-shaped protrusion 221 and the T-shaped groove 211 are inserted into each other. From the perspective of connection stability, the concave-convex fit of the T-shaped structure has anti-disengagement characteristics. When pressure is applied to the abutting part 22, the T-shaped protrusion 221 can form a tight fit with the inner walls on both sides of the T-shaped groove 211, effectively limiting the displacement of the abutting part 22 in the horizontal and vertical directions, avoiding loosening or falling off, and ensuring that the abutting part 22 always applies pressure stably to the workpiece 100. At the same time, this insertion method realizes quick loading and unloading. No complicated tools or operations are required. The replacement or installation of the abutting part 22 can be completed by simply inserting and pulling, which greatly improves the ease of use and adaptability of the fixture, and facilitates quick adjustment of the abutting part 22 according to the specifications of different workpieces 100. In other embodiments, the fixing part 21 is provided with a T-shaped protrusion 221 and the abutting part 22 is provided with a T-shaped groove 211. The T-shaped protrusion 221 and the T-shaped groove 211 are inserted and engaged, which can also achieve a stable connection between the fixing part 21 and the abutting part 22.

[0038] In other embodiments, the abutment surface 222 of the abutment portion 22 is provided with a countersunk hole, and the fixing portion 21 is provided with a threaded hole. After the bolt passes through the countersunk hole, it is threadedly connected to the threaded hole, which can also realize the detachable connection between the fixing portion 21 and the abutment portion 22. The countersunk hole design allows the bolt head to be fully embedded in the abutment surface 222, preventing the bolt head from protruding from the abutment surface 222 and contacting the workpiece 100. This prevents the surface of the workpiece 100 from being scratched or damaged due to the bolt head being too hard, and ensures the flatness of the contact between the abutment surface 222 and the workpiece 100. At the same time, the abutment pressure of the abutment portion 22 on the workpiece 100 can be adjusted by tightening the bolt. This ensures that the abutment portion 22 fits tightly against the workpiece 100 for stable fixing, while avoiding excessive pressure that could cause deformation or damage to the workpiece 100.

[0039] like Figures 1-3As shown, the abutment surface 222 of the abutment portion 22 is inclined away from the workpiece 100 relative to the direction pointing towards it, so that the abutment surface 222 forms a line contact with the workpiece 100. Compared with surface contact, line contact can form concentrated and stable pressure in the contact area, ensuring effective fixation of the workpiece 100 and avoiding loosening due to pressure dispersion caused by excessive contact area. At the same time, line contact reduces the contact range between the abutment surface 222 and the workpiece 100. Combined with the soft metal material used in the abutment portion 22, it can further reduce friction and compression on the surface of the workpiece 100, reducing scratches or indentations that may occur from large-area contact. In addition, the inclined abutment surface 222 can also adapt to the slight curvature or irregular shape that the workpiece 100 may have. Through the adaptive fit of line contact, it ensures that a balanced clamping force can be applied in different parts, which not only improves the reliability of fixation, but also maximizes the protection of the surface quality of the workpiece 100, providing a stable foundation for subsequent processing.

[0040] In this embodiment, the height of the workpiece 100 is greater than or equal to the depth of the receiving groove 11. When the height of the workpiece 100 is equal to the depth of the receiving groove 11, the top of the workpiece 100 can be flush with the edge of the receiving groove 11, facilitating the smooth application of pressure from above by the abutment part 22 and ensuring balanced clamping. When the height of the workpiece 100 is greater than the depth of the receiving groove 11, part of the structure of the workpiece 100 protrudes from the receiving groove 11, avoiding inconvenience caused by excessive groove depth and allowing the protruding part to become the main working area of ​​the abutment part 22, concentrating the pressure more effectively at the fixed position of the workpiece 100 and reducing interference with non-processing areas. At the same time, this height relationship ensures that the workpiece 100 will not have wobbling space in the receiving groove 11 due to excessive groove depth. Combined with the line contact design of the abutment part 22, it can form a vertical limiting constraint, further improving the stability of the fixation. Furthermore, for the workpiece 100 that needs to be machined on the surface, the design that the height is greater than or equal to the depth of the receiving groove 11 can prevent the edge of the groove from blocking the machining area, provide sufficient operating space for the tool or machining equipment, reduce machining interference, and thus improve the convenience and accuracy of machining operation while ensuring the fixing effect.

[0041] like Figures 1-3As shown, the fixture also includes multiple first fasteners 3, each corresponding to a pressing member 2. Each fixing part 21 has a first mounting hole 212, and the base 1 has multiple second mounting holes. The first fasteners 3 pass through the corresponding first mounting holes 212 and second mounting holes sequentially, and are threadedly connected to the second mounting holes, thus achieving a stable connection between the pressing member 2 and the base 1. The threaded connection itself has reliable self-locking properties. After tightening the first fasteners 3, the fixing part 21 can be firmly locked onto the base 1, preventing the pressing member 2 from loosening or shifting when pressure is applied to the workpiece 100 or during processing, providing a solid guarantee for the overall fixture's fixing effect. Simultaneously, this one-to-one correspondence connection method allows each pressing member 2 to obtain independent and stable fixed support, ensuring balanced force distribution when multiple pressing members 2 work together. In addition, the detachability of the threaded connection makes the assembly and disassembly of the pressing part 2 simple, and facilitates the quick replacement or adjustment of the position and quantity of the pressing part 2 according to the specifications or processing requirements of the workpiece 100. This improves the flexibility and applicability of the fixture, and also provides convenience for later maintenance and repair, thus optimizing the overall performance of the fixture.

[0042] Optionally, the base 1 and the fixing part 21 can also be connected by a snap-fit ​​connection, that is, the hooks on the fixing part 21 and the slots on the base 1 engage with each other. This method can be completed without additional tools, which can greatly improve the operation efficiency, and the structure after snapping has good stability, which can meet the fixing requirements of general processing scenarios. Optionally, the base 1 and the fixing part 21 can also be connected by a pin, with the pin passing through the first mounting hole 212 and the second mounting hole, and the pin is fixed by the tight fit between the pin and the hole. Its positioning accuracy is high, which can ensure that the pressing part 2 maintains an accurate position after multiple disassemblies and reassemblies, and is suitable for processing situations with high positioning requirements. These detachable connection methods can all achieve flexible connection between the pressing part 2 and the base 1, and the appropriate connection method can be selected according to different processing requirements.

[0043] like Figure 2 and Figure 3As shown, the first mounting hole 212 is an elongated hole extending along the direction of the fixing part 21. When the first fastener 3 passes through the elongated hole and connects to the second mounting hole of the base 1, the fixing part 21 can be finely adjusted in position along the extension direction of the elongated hole to adapt to minor differences in size and shape of the workpiece 100, or to adjust the pressure application position of the abutment part 22 on the workpiece 100 according to processing requirements, ensuring that the clamping force can be accurately applied to the optimal area. This adjustability effectively improves the adaptability range of the fixture and avoids the problem of insufficient adaptability caused by the fixed position of the mounting hole, which is especially suitable for batch processing scenarios of multi-specification workpieces 100. At the same time, the structure of the elongated hole does not affect the stability of the connection. After the position is determined, the fixing part 21 can still be firmly locked by tightening the first fastener 3, ensuring the stability of pressure transmission. Furthermore, this design reduces the stringent requirements for machining and assembly precision. Even if there are minor machining errors in the mounting holes of the fixing part 21 or the base 1, they can be compensated for by the adjustment function of the elongated hole, reducing assembly difficulties caused by error accumulation and improving the practicality and production efficiency of the fixture.

[0044] In this embodiment, the fixture also includes multiple gaskets, with one gasket placed between each of the first fasteners 3 and the fixing part 21. The gaskets increase the contact area between the first fastener 3 and the fixing part 21. When the first fastener 3 is tightened, the pressure is more evenly distributed on the fixing part 21, preventing deformation of the fixing part 21 or the first mounting hole 212 (especially the elongated hole) due to excessive local force, thereby protecting the integrity of the component structure and extending the service life of the fixture. Simultaneously, the gaskets enhance friction, reducing the possibility of the first fastener 3 loosening due to vibration or other factors during processing. Combined with the adjustment function of the elongated hole, while ensuring the position of the fixing part 21 is finely adjustable, the stability of the connection is further improved, ensuring that the pressure of the contact part 22 on the workpiece 100 remains stable and reliable. Furthermore, for the fixing part 21, which may have slightly uneven surfaces, the gaskets can also play a leveling role, allowing the locking force of the first fastener 3 to be transmitted more effectively, avoiding locking failure due to uneven contact surfaces, thus improving the overall reliability and performance of the fixture in detail.

[0045] like Figure 1As shown, the base 1 is provided with a handle groove 12 that communicates with the receiving groove 11. When the workpiece 100 is placed in the receiving groove 11, the handle groove 12 forms a space for the hand to reach in, allowing the operator to easily access the edge of the workpiece 100 through the handle groove 12. Especially when the workpiece 100 is in close contact with the receiving groove 11, it effectively avoids difficulties in picking up or placing due to difficulty in applying force. At the same time, the communication structure between the handle groove 12 and the receiving groove 11 does not affect the positioning effect of the receiving groove 11 on the workpiece 100, which not only ensures the stability of the workpiece 100 during processing, but also simplifies the loading and unloading process, reduces the time cost of picking up and placing, and helps to improve the overall processing efficiency. Specifically, a handle groove 12 is provided between any two adjacent clamping parts.

[0046] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A clamp, characterized in that, include: The base (1) and a plurality of pressing parts (2) are provided. The base (1) is provided with a receiving groove (11) for receiving a workpiece (100). The plurality of pressing parts (2) are arranged around the receiving groove (11). Each pressing part (2) includes a fixing part (21) and an abutting part (22) that are detachably connected. The fixing part (21) is detachably connected to the base (1). The abutting part (22) can press the workpiece (100) into the receiving groove (11). The fixing part (21) is made of hard metal and the abutting part (22) is made of soft metal.

2. The clamp according to claim 1, characterized in that, The abutting part (22) is made of aluminum or titanium, and the material hardness of the abutting part (22) is lower than that of the fixing part (21).

3. The clamp according to claim 2, characterized in that, The fixing part (21) is made of cast iron or carbon steel.

4. The clamp according to any one of claims 1-3, characterized in that, One of the abutting part (22) or the fixing part (21) is provided with a T-shaped groove (211), and the other of the abutting part (22) or the fixing part (21) is provided with a T-shaped protrusion (221). The T-shaped protrusion (221) is inserted into the T-shaped groove (211).

5. The clamp according to any one of claims 1-3, characterized in that, The contact surface (222) of the contact portion (22) is inclined away from the workpiece (100) in the direction pointing towards the workpiece (100) so that the contact surface (222) forms a line contact with the workpiece (100).

6. The clamp according to any one of claims 1-3, characterized in that, The height of the workpiece to be processed (100) is greater than or equal to the depth of the receiving groove (11).

7. The clamp according to any one of claims 1-3, characterized in that, The clamp also includes a plurality of first fasteners (3), each of which corresponds to one of the pressing parts (2). Each of the fixing parts (21) is provided with a first mounting hole (212), and the base (1) is provided with a plurality of second mounting holes. The first fasteners (3) pass through the corresponding first mounting holes (212) and second mounting holes in sequence and are threadedly connected to the second mounting holes.

8. The clamp according to claim 7, characterized in that, The first mounting hole (212) is an elongated hole provided along the extending direction of the fixing part (21).

9. The clamp according to claim 7, characterized in that, The clamp also includes multiple gaskets, with one gasket provided between each of the first fasteners (3) and the fixing part (21).

10. The clamp according to any one of claims 1-3, characterized in that, The base (1) is provided with a handle groove (12) that communicates with the receiving groove (11).

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