Quick clamping seat and universal fixture for shaft parts

Abstract

The utility model discloses a universal fixture for a fast-assembly clamping seat and shaft parts, which relates to the technical field of milling fixtures, and is characterized in that the universal fixture for the fast-assembly clamping seat and the shaft parts adopts the combined design of a three-point type constraint clamping space and a replaceable bevel angle clamping block and combines the self-adaptive deformation capability of a flexible clamping arm; stable clamping of shaft parts with different diameters is achieved, and the problem that a traditional clamp is poor in adaptability is solved; the eccentric cam constraint mechanism realizes progressive stepless locking through rotation of a handle, so that the clamping efficiency is remarkably improved; according to the universal fixture for the shaft parts, the clamping distance can be flexibly adjusted, the universal fixture can be quickly adapted to the shaft parts of different specifications, the tool preparation time is greatly shortened, and the universal fixture is particularly suitable for a multi-variety small-batch production scene.

Description

Technical Field

[0001] This utility model relates to the field of milling fixture technology, specifically to a quick-setup clamp and a general-purpose fixture for shaft parts. Background Technology

[0002] Several key problems exist in existing shaft clamping technologies. First, most traditional fixtures can only accommodate shafts of specific sizes, such as the common fixed V-block fixture. When encountering shafts of different diameters or stepped shafts, it's necessary to replace fixture components or even the entire fixture, which is both time-consuming and costly. For example, changing fixtures to accommodate different sized shafts requires disassembling and assembling multiple bolts and washers, resulting in complex procedures and excessive production downtime. Second, many fixtures rely on manually adjusting bolts or levers for clamping, making it difficult to precisely control the clamping force—clamping too tightly may damage the workpiece surface, while clamping too loosely can cause wobbling during machining, affecting machining accuracy. For irregularly shaped shafts or parts with irregular surfaces, the rigid structure of traditional fixtures cannot adaptively fit, easily leading to unstable clamping.

[0003] Furthermore, clamping long shaft parts is particularly difficult. Existing fixtures often only provide radial clamping and lack effective axial positioning capabilities. During machining, shafts are prone to axial movement, requiring the installation of additional thrust blocks or centers. However, these additional devices usually require separate adjustments, increasing the complexity of clamping. In scenarios where frequent changes in the workpiece are necessary, the time-consuming adjustment of traditional fixtures becomes even more pronounced. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned problems by providing a quick-release clamping base and a universal fixture for shaft parts. Through a combination of a three-point constraint clamping space and replaceable angled clamping blocks, along with the adaptive deformation capability of the flexible clamping arm, it achieves stable clamping of shaft parts with different diameters, solving the problem of poor adaptability of traditional fixtures. The eccentric cam constraint mechanism achieves progressive stepless locking through handle rotation, significantly improving clamping efficiency. The flexible adjustment function of the clamping distance of the universal fixture for shaft parts allows for quick adaptation to shaft parts of different specifications, greatly reducing tooling preparation time, making it particularly suitable for multi-variety, small-batch production scenarios.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A quick-release clamping base includes a clamping base, angled clamping blocks, clamping arms, and a constraint mechanism. The clamping base has a clamping arm hinged to one side and a constraint mechanism on the other side. A support seat is located in the middle of the clamping base. Pairs of angled clamping blocks are assembled opposite each other at the top ends of the support seat. Each angled clamping block has a working inclined surface at a set angle to the horizontal direction. The pair of angled clamping blocks and the support seat cooperate to form a V-shaped clamping shaft seat. One end of the clamping arm is hinged to the clamping base, and the other end can be constrained by the constraint mechanism. When the clamping arm is constrained by the constraint mechanism, it can cooperate with the V-shaped clamping shaft seat to form a three-point constraint clamping space for shaft-type parts.

[0007] Thanks to the aforementioned technical solution, multi-directional stable constraints on shaft parts are achieved through a three-point constraint clamping space, ensuring both clamping stability and adaptability to different shaft diameters. The combination design of the V-type clamping shaft seat and the adjustable clamping arm significantly improves the versatility of the quick-set clamping seat, allowing for the assembly of V-type clamping shaft seats of different sizes to accommodate shaft parts of different diameters, meeting the clamping requirements of various shaft parts such as stepped shafts and irregularly shaped shafts.

[0008] Furthermore, the clamping arm includes a hinged section, a clamping section, and a free section connected in sequence. The hinged section is hinged to the clamping base, and the clamping section is composed of two plate-like structures with a set angle. When the clamping arm is in the locked state, the clamping section is engaged with the clamping base and presents an inverted V-shaped structure. The vertex of the angle of the clamping section matches the center of the V-shaped clamping shaft and cooperates with the V-shaped clamping shaft to form a three-point constraint clamping space for the shaft-like parts. The constraint mechanism acts and restricts the free section. When the clamping arm is in the unlocked state, the constraint mechanism releases the restriction on the free section of the clamping arm, and the clamping arm can rotate around the hinged section.

[0009] Thanks to the aforementioned technical solution, the inverted V-shaped clamping section and the V-shaped clamping bearing form a geometrically symmetrical constraint, effectively dispersing clamping stress. The angled design of the clamping section enhances the adaptability of the clamping arm to clamping shaft-like parts, avoiding localized stress concentration at the contact point of the clamping arm when clamping shaft-like parts. The articulated structure, combined with the constraint mechanism at the free end, enables rapid opening and closing, ensuring both clamping accuracy and operational efficiency.

[0010] Furthermore, the constraint mechanism includes a connecting arm and a cam limiting member. The cam limiting member includes a cam body, an eccentric shaft, and a handle extending outward from one side of the cam body. One end of the connecting arm is hinged to the clamping base, and the other end is rotatably connected to the eccentric shaft. The cam body and the eccentric shaft are rotatably connected to form an eccentric cam. The free section includes a connecting part and a limiting part. One end of the connecting part is connected to the limiting part, and the other end is connected to the clamping section. The connecting part is a folded plate structure bent inward toward the inverted V-shaped clamping section, and the limiting part is a claw structure extending outward toward the inverted V-shaped clamping section. The connecting part and the limiting part cooperate to form a J-shaped topology. The claw structure can match the cam body, and the handle can drive the cam body to rotate and form a progressive contact constraint with the claw structure.

[0011] Thanks to the above technical solution, the eccentric cam mechanism achieves stepless adjustment of clamping force control. The cam body can be rotated by the handle to adaptively lock the clamping arm, thus achieving effective clamping of shaft parts of different diameters.

[0012] Furthermore, the chuck structure has a first shaft mating groove in the middle, which is adapted to the connecting arm. When the constraint mechanism acts on the clamping arm, the connecting arm can be embedded in the first shaft mating groove. The cam body has a second shaft mating groove in the middle, and the connecting arm extends into the second shaft mating groove and forms a rotatable connection with the cam body through an eccentric shaft.

[0013] Because of the above technical solution, after the connecting arm is fitted into the first shaft mating groove, the first shaft mating groove is used to achieve rotational positioning of the connecting arm. The second shaft mating groove can avoid interference between the rotation of the cam body and the connecting arm. At the same time, the design of the first shaft mating groove and the second shaft mating groove makes the cam body uniformly stressed when forming a constraint with the pawl structure. The structure is compact and suitable for high-frequency opening and closing work scenarios.

[0014] Furthermore, the clamping arm is a flexible component capable of elastic deformation under load.

[0015] Thanks to the above technical solutions, the flexible component design gives the quick-release clamping seat adaptive adjustment capability, which can automatically compensate for the size error and shape deviation of shaft parts, and can also be used with different V-type clamping shaft seats to clamp shaft parts of different diameters.

[0016] A general-purpose fixture for shaft parts includes several quick-release clamps, a fixed plate, and a fixed base. The quick-release clamps are disposed on the fixed plate, and pairs of fixed bases are respectively disposed at both ends of the fixed plate along the axial direction of the fixed plate. One fixed base is equipped with a thrust block, and the other fixed base is equipped with an adjustable center. The thrust block and the adjustable center can cooperate with each other to form an axial constraint on the shaft parts.

[0017] Thanks to the aforementioned technical solutions, the modular design of the universal fixture for shaft parts achieves integrated control of axial and radial constraints. The combination of adjustable centers and thrust blocks ensures axial positioning accuracy while allowing for thermal expansion compensation. The parallel arrangement of multiple quick-setup clamps significantly improves the clamping stability of long shaft parts and stepped shaft parts, making it particularly suitable for milling keyways on high-precision shaft parts. This universal fixture for shaft parts enables rapid assembly through standardized interfaces and can flexibly adapt to the machining needs of shaft parts of different lengths and diameters.

[0018] Furthermore, the fixing plate is provided with a plurality of limiting protrusions / limiting grooves along the axial direction, and the fixing seat and quick-release clamp are provided with a plurality of limiting grooves / limiting protrusions, wherein the limiting grooves and limiting protrusions match each other.

[0019] Thanks to the above technical solution, the matching structure of the limiting protrusion and the limiting groove enables rapid and accurate positioning of the fixed seat and shaft parts, ensuring the parallelism of the fixed seat and shaft parts.

[0020] Furthermore, the limiting groove is a trapezoidal groove, and the limiting protrusion is a trapezoidal protrusion.

[0021] Thanks to the above technical solution, the trapezoidal structure has self-centering characteristics and automatically generates a wedge-tightening effect when subjected to radial loads, which significantly enhances the connection stability.

[0022] Furthermore, the fixing plate is provided with several sets of slots spaced apart axially, and the quick-release clamp and the fixing seat can be fixedly connected to the corresponding slots through connectors.

[0023] Thanks to the aforementioned technical solutions, the slotted connection structure offers an axially adjustable assembly method, allowing for flexible adjustment of the clamping spacing according to processing requirements. The standardized slotted hole design enables rapid positioning and repeated clamping, significantly shortening tooling preparation time. It is particularly suitable for multi-variety, small-batch production scenarios, providing more process possibilities for machining complex shaft parts.

[0024] In summary, due to the adoption of the above technical solutions, the beneficial effects of this utility model are as follows: The combination design of a three-point constraint clamping space and replaceable angled clamping blocks achieves stable clamping of shafts of different diameters, such as stepped shafts and irregularly shaped shafts, solving the problem of poor adaptability of traditional fixtures; the geometrically symmetrical structure of the inverted V-shaped clamping section and the V-shaped clamping shaft seat effectively disperses clamping stress, and combined with the adaptive deformation capability of the flexible clamping arm, it avoids damage to the workpiece due to local stress concentration and compensates for dimensional errors and thermal deformation; the eccentric cam constraint mechanism achieves progressive stepless locking through handle rotation, significantly improving clamping efficiency, and reducing single operation time by more than 80% compared to traditional bolt tightening; the modular combination design of the universal fixture for shaft parts integrates the fixed seat and the quick-installation clamping seat, and through the standardized interface of the trapezoidal limiting groove and slot hole, ensures the parallelism and stability of the installation, supporting high-precision machining of long shaft parts; and the flexible adjustment function of the clamping distance can quickly adapt to shaft parts of different specifications, greatly reducing tooling preparation time, making it particularly suitable for multi-variety, small-batch production scenarios. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the universal fixture for shaft parts of this utility model;

[0026] Figure 2 This is a schematic diagram of the quick-release clamp of this utility model;

[0027] Figure 3 This is an exploded view of the quick-release clamp of this utility model;

[0028] Figure 4 This is a front view of the quick-release clamp of this utility model;

[0029] Figure 5 This is a schematic diagram of the quick-assembly clamp of this utility model and its assembly with shaft parts of different diameters.

[0030] The markings in the diagram are: 1-fixed plate, 101-limiting protrusion, 102-limiting groove, 2-fixed seat, 3-quick-release clamp, 301-clamping base, 302-angled clamping block, 303-clamping arm, 304-connecting arm, 305-constraint mechanism, 4-stepped shaft, 5-adjustable center, 6-thrust block, 7-first shaft mating groove, 8-second shaft mating groove, 9-hinged section, 10-clamping section, 11-connecting part, 12-limiting part, 13-connecting piece, 14-cam body, 15-eccentric shaft, 16-handle, 17-support seat, 18-stepped mounting seat. Detailed Implementation

[0031] The present invention will now be described in detail with reference to the accompanying drawings.

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0033] Example 1

[0034] A quick-release clamp, such as Figures 2-5 As shown, the device includes a clamping base 301, an angled clamping block 302, a clamping arm 303, and a constraint mechanism 305. The clamping base 301 has a clamping arm 303 hinged to one side and a constraint mechanism 305 on the other side. A support base 17 is provided in the middle of the clamping base 301. Pairs of angled clamping blocks 302 are assembled opposite each other at the top ends of the support base 17. Each angled clamping block 302 has a working inclined surface at a set angle to the horizontal direction. Preferably, the working inclined surface can form a 45-degree angle with the horizontal plane. The pair of angled clamping blocks 302 and the support base 17 cooperate with each other to form a V-shaped clamping shaft seat. One end of the clamping arm 303 is hinged to the clamping base 301, and the other end can be restricted to the constraint mechanism 305. When the clamping arm 303 is restricted to the constraint mechanism 305, it can cooperate with the V-shaped clamping shaft seat to form a three-point constraint clamping space for shaft parts.

[0035] Specifically, a three-point constraint clamping space achieves multi-directional stability constraint on shaft-type parts, ensuring clamping stability while also accommodating different shaft diameters. Figure 5 As shown, quick-release clamps 3 with diameters of Φ6, Φ16, Φ26, and Φ36 are displayed respectively. The combination design of the V-type clamping shaft seat and the adjustable clamping arm 303 significantly improves the versatility of the quick-release clamp, allowing the assembly of V-type clamping shaft seats of different sizes to accommodate shaft parts of different diameters, meeting the clamping requirements of various shaft parts such as stepped shafts 4 and irregularly shaped shafts.

[0036] The clamping arm 303 includes a hinged section 9, a clamping section 10, and a free section connected in sequence. The hinged section 9 is hinged to the clamping base 301. The clamping section 10 is composed of two plate-like structures with a set angle. The angle of the angle depends on the diameter of the clamped shaft part and ranges from 150 to 180 degrees. When the clamping arm 303 is in the locked state, the clamping section 10 is engaged with the clamping base 301 and presents an inverted V-shaped structure. The vertex of the angle of the clamping section 10 matches the center of the V-shaped clamping shaft seat and cooperates with the V-shaped clamping shaft seat to form a three-point constraint clamping space for the shaft part. The constraint mechanism 305 acts and restricts the free section. When the clamping arm 303 is in the unlocked state, the constraint mechanism 305 releases the restriction on the free section of the clamping arm 303, and the clamping arm 303 can rotate around the hinged section 9.

[0037] Specifically, the inverted V-shaped clamping section 10 and the V-shaped clamping shaft seat form a geometrically symmetrical constraint, effectively dispersing clamping stress. The angled design of the clamping section 10 enhances the adaptability of the clamping arm 303 to clamping shaft-type parts, avoiding localized stress concentration at the contact point of the clamping arm 303 when clamping shaft-type parts. The hinged structure, combined with the constraint mechanism 305 of the free section, enables rapid opening and closing, ensuring both installation accuracy and operational efficiency.

[0038] The constraint mechanism 305 includes a connecting arm 304 and a cam limiting member. The cam limiting member includes a cam body 14, an eccentric shaft 15, and a handle 16 extending outward from one side of the cam body 14. One end of the connecting arm 304 is hinged to the clamping base 301, and the other end is rotatably connected to the eccentric shaft 15. The cam body 14 and the eccentric shaft 15 are rotatably connected to form an eccentric cam. The free section includes a connecting part 11 and a limiting part 12. One end of the connecting part 11 is connected to the limiting part 12, and the other end is connected to the clamping section 10. The connecting part 11 is a folded plate structure bent inward toward the inverted V-shaped clamping section 10, and the limiting part 12 is a claw structure extending outward toward the inverted V-shaped clamping section 10. The connecting part 11 and the limiting part 12 cooperate with each other to form a J-shaped topology. The claw structure can match the cam body 14, and the handle 16 can drive the cam body 14 to rotate and form a progressive contact constraint with the claw structure.

[0039] Specifically, the eccentric cam mechanism achieves stepless adjustment of clamping force control. The cam body 14 can be rotated by the handle 16 to adaptively lock the clamping arm 303, thereby achieving effective clamping of shaft parts of different diameters.

[0040] The chuck structure has a first shaft mating groove 7 in the middle, which is adapted to the connecting arm 304. When the constraint mechanism 305 acts on the clamping arm 303, the connecting arm 304 can be embedded in the first shaft mating groove 7. The cam body 14 has a second shaft mating groove 8 in the middle, and the connecting arm 304 extends into the second shaft mating groove 8 and forms a rotatable connection with the cam body 14 through the eccentric shaft 15.

[0041] Specifically, after the connecting arm 304 is fitted into the first shaft mating groove 7, the first shaft mating groove 7 is used to achieve rotational positioning of the connecting arm 304. The second shaft mating groove 8 can prevent the rotation of the cam body 14 from interfering with the connecting arm 304. At the same time, the design of the first shaft mating groove 7 and the second shaft mating groove 8 makes the cam body 14 uniformly stressed when forming a constraint with the pawl structure. The structure is compact and suitable for high-frequency opening and closing work scenarios.

[0042] The clamping arm 303 is a flexible component that can undergo elastic deformation under load.

[0043] Specifically, the flexible component design gives the quick-release clamp 3 adaptive adjustment capability, which can automatically compensate for the size error and shape deviation of shaft parts, and can also be used with different V-type clamping shaft seats to clamp shaft parts of different diameters.

[0044] Example 2

[0045] A general-purpose fixture for shaft-type parts, such as Figure 1 As shown, the device includes three quick-release clamps 3, a fixed plate 1, and a fixed base 2. The three quick-release clamps 3 are mounted on the fixed plate 1. The number of quick-release clamps 3 can be arbitrarily set as needed, but generally not less than two. In this embodiment, three are set according to the shape and length of the stepped shaft 4. The paired fixed bases 2 are respectively mounted on both ends of the fixed plate 1 along the axial direction. One fixed base 2 is equipped with a thrust block 6, and the other fixed base 2 is equipped with an adjustable center 5. The thrust block 6 and the adjustable center 5 can cooperate with each other to form an axial constraint on the shaft-like parts. The adjustable center 5 includes a center body, an adjusting screw, and a rotating handle. The two ends of the adjusting screw along the length direction are respectively connected to the center body and the rotating handle. The adjusting screw is threaded to the fixed base 2. Rotating the rotating handle allows the center body to move axially relative to the fixed base 2, thereby achieving axial constraint on the shaft-like parts.

[0046] Specifically, the modular design of the universal fixture for shaft parts achieves integrated control of axial and radial constraints. The combination of the adjustable center 5 and the thrust block 6 ensures both axial positioning accuracy and allows for thermal expansion compensation. The parallel arrangement of multiple quick-release clamps 3 significantly improves the clamping stability of long shaft parts and stepped shafts 4, making it particularly suitable for milling keyways on high-precision shaft parts. This universal fixture for shaft parts enables rapid assembly through standardized interfaces and can flexibly adapt to the machining needs of shaft parts of different lengths and diameters.

[0047] The fixing plate 1 is provided with a plurality of limiting protrusions 101 along the axial direction, and the fixing seat 2 and the quick-release clamping seat 3 are provided with a plurality of limiting grooves 102, the limiting grooves 102 and the limiting protrusions 101 matching each other.

[0048] Specifically, the matching structure of the limiting protrusion 101 and the limiting groove 102 enables the fixed seat 2 and the shaft parts to be positioned quickly and accurately, ensuring the parallelism of the fixed seat 2 and the shaft parts.

[0049] The limiting groove 102 is a trapezoidal groove, and the limiting protrusion 101 is a trapezoidal protrusion.

[0050] Specifically, the trapezoidal structure has a self-centering characteristic, which automatically generates a wedge-tightening effect when subjected to radial loads, significantly enhancing connection stability.

[0051] The fixing plate 1 is provided with several sets of slots spaced upwards along the axis. The quick-release clamp 3 and the fixing seat 2 can be fixedly connected to the corresponding slots by the connector 13. The slots are not shown in the figure.

[0052] Specifically, the slotted connection structure provides an axially adjustable assembly solution, allowing for flexible adjustment of the clamping spacing according to processing requirements. The standardized slot design enables rapid positioning and repeated clamping, significantly shortening tooling preparation time. It is particularly suitable for multi-variety, small-batch production scenarios, providing more process possibilities for the machining of complex shaft parts.

[0053] The method of using the general-purpose fixture for shaft parts is as follows: First, select the corresponding clamping base 301 according to the diameter of the shaft part, install the angled clamping block 302 onto the clamping base 301, install the quick-release clamping seat 3 and the fixed seat 2 onto the limiting protrusion 101 of the fixed plate 1 through the limiting groove 102, and use the connector 13 to fix the fixed seat 2 with the thrust block 6 to the fixed plate 1 to form a positioning reference. Place the shaft part on the V-shaped clamping shaft seat formed by the pair of angled clamping blocks 302 and the support seat 17, and make one axial end of the shaft part abut against the thrust block 6. After adjusting the axial position of all quick-release clamping seats 3 according to the shape of the shaft part, fix the quick-release clamping seat 3 to the fixed plate 1 with the connector 13. Then, according to the length of the shaft part, determine the position of the fixed seat 2 with the adjustable tip 5 on the other side, and fix the fixed seat 2 with the adjustable tip 5 to the fixed plate 1 through the connector 13. Adjust the adjustable tip 5 to abut against the end of the shaft part to complete the axial positioning of the shaft part. Rotate the clamping arm 303 to make it abut against the upper surface of the shaft part. Rotate the connecting arm 304 to make it engage with the first shaft mating groove 7 on the limiting part 12. Press down the handle 16 to drive the cam body 14 to rotate. The cam body 14 gradually presses against the limiting part 12, making the clamping arm 303 locked. The radial clamping of the shaft part is completed through three-point constraint. After processing, lift the handle 16 in the opposite direction to quickly open the quick-release clamp 3. After the adjustable tip 5 is moved away from the axial end face of the shaft part, the shaft part can be disassembled. The universal fixture for shaft parts supports the parallel installation of multiple quick-release clamps 3 to meet the multi-point support requirements of long shaft parts.

[0054] This document uses specific embodiments to illustrate the principles and implementation methods of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

[0055] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, 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.

[0056] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A quick-release clamp, characterized in that, The device includes a clamping base, angled clamping blocks, clamping arms, and a constraint mechanism. The clamping base has a clamping arm hinged to one side and a constraint mechanism on the other side. A support seat is located in the middle of the clamping base. Pairs of angled clamping blocks are assembled opposite each other at the top ends of the support seat. Each angled clamping block has a working inclined surface at a set angle to the horizontal direction. The pair of angled clamping blocks and the support seat cooperate to form a V-shaped clamping shaft seat. One end of the clamping arm is hinged to the clamping base, and the other end can be restricted to the constraint mechanism. When the clamping arm is restricted to the constraint mechanism, it can cooperate with the V-shaped clamping shaft seat to form a three-point constraint clamping space for shaft parts.

2. The quick-release clamp as described in claim 1, characterized in that, The clamping arm includes a hinged section, a clamping section, and a free section connected in sequence. The hinged section is hinged to the clamping base. The clamping section is composed of two plate-like structures with a set angle. When the clamping arm is in the locked state, the clamping section is engaged with the clamping base and presents an inverted V-shaped structure. The vertex of the angle of the clamping section matches the center of the V-shaped clamping shaft and cooperates with the V-shaped clamping shaft to form a three-point constraint clamping space for the shaft-like parts. The constraint mechanism acts and restricts the free section. When the clamping arm is in the unlocked state, the constraint mechanism releases the restriction on the free section of the clamping arm, and the clamping arm can rotate around the hinged section.

3. The quick-release clamp as described in claim 2, characterized in that, The constraint mechanism includes a connecting arm and a cam limiting component. The cam limiting component includes a cam body, an eccentric shaft, and a handle extending outward from one side of the cam body. One end of the connecting arm is hinged to the clamping base, and the other end is rotatably connected to the eccentric shaft. The cam body and the eccentric shaft are rotatably connected to form an eccentric cam. The free section includes a connecting part and a limiting part. One end of the connecting part is connected to the limiting part, and the other end is connected to the clamping section. The connecting part is a folded plate structure bent inward towards the inverted V-shaped clamping section, and the limiting part is a claw structure extending outward towards the inverted V-shaped clamping section. The connecting part and the limiting part cooperate to form a J-shaped topology. The claw structure can match the cam body, and the handle can drive the cam body to rotate and form a progressive contact constraint with the claw structure.

4. The quick-release clamp as described in claim 3, characterized in that, The chuck structure has a first shaft mating groove in the middle, which is adapted to the connecting arm. When the constraint mechanism acts on the clamping arm, the connecting arm can be embedded in the first shaft mating groove. The cam body has a second shaft mating groove in the middle, and the connecting arm extends into the second shaft mating groove and forms a rotatable connection with the cam body through an eccentric shaft.

5. The quick-release clamp as described in any one of claims 1-4, characterized in that, The clamping arm is a flexible component that can undergo elastic deformation under load.

6. The quick-release clamp as described in claim 1, characterized in that, The support base has a trapezoidal structure, and a T-shaped groove is provided at the top of the support base. The T-shaped groove forms symmetrically arranged stepped mounting seats at both ends of the top of the support base. The angled clamping block has a right-angle mounting part on the opposite side of the working inclined surface. The right-angle mounting part can match the stepped mounting seat. The upper edge of the working inclined surface extends into a horizontal assembly surface. The horizontal assembly surface and the top surface of the stepped mounting seat are respectively provided with assembly holes. The fitting can pass through the assembly holes on the horizontal assembly surface and the assembly holes on the stepped mounting seat in sequence to restrict the angled clamping block to the stepped mounting seat.

7. A general-purpose fixture for shaft-type parts, characterized in that, The device includes several quick-release clamps as described in any one of claims 1-6, and also includes a fixed plate and a fixed seat. Several quick-release clamps are disposed on the fixed plate, and pairs of fixed seats are respectively disposed at both ends of the fixed plate along the axial direction of the fixed plate. One fixed seat is equipped with a thrust block, and the other fixed seat is equipped with an adjustable center. The thrust block and the adjustable center can cooperate with each other to form an axial constraint on the shaft-type parts.

8. The universal fixture for shaft parts as described in claim 7, characterized in that, The fixing plate is provided with a plurality of limiting protrusions / limiting grooves along the axial direction, and the fixing seat and quick-release clamp are provided with a plurality of limiting grooves / limiting protrusions, wherein the limiting grooves and limiting protrusions are matched with each other.

9. The universal fixture for shaft parts as described in claim 8, characterized in that, The limiting groove is a trapezoidal groove, and the limiting protrusion is a trapezoidal protrusion.

10. The universal fixture for shaft parts as described in any one of claims 7-9, characterized in that, The fixing plate is provided with several sets of slots spaced apart axially, and the quick-release clamp and the fixing seat can be fixedly connected to the corresponding slots through connectors.

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