A flexible clamp

Abstract

This utility model discloses a flexible fixture, including a worktable, a base mounted on the worktable, and flexible modular units mounted on the base. The flexible modular units can be assembled and connected to each other. Each flexible modular unit includes a module shell, a telescopic top block, a shaft seat, and a rotary drive limiting component. A guide hole is formed along the length direction inside the module shell, and a telescopic top block that can move along its length is fitted into the guide hole. The rear end of the screw of the rotary drive limiting component is screwed into a screw hole in the axial direction of the telescopic top block. This fixture, through the flexible assembly of the modular units, can adapt to parts of different sizes and shapes, eliminating the need to design a dedicated fixture for each part and reducing fixture manufacturing costs. Simultaneously, the screw-driven telescopic top block achieves stable clamping, shortening the fixture adjustment time during part changeovers, improving production efficiency, and solving the problems of poor versatility and high changeover costs of traditional fixtures. It is suitable for multi-variety, small-batch production scenarios.

Description

Technical Field

[0001] This utility model belongs to the field of clamping technology, and specifically relates to a flexible clamp. Background Technology

[0002] In modern machining, multi-variety, small-batch production is common, but traditional machining fixtures have significant drawbacks and are difficult to adapt to these production needs. First, traditional fixtures lack versatility. For parts of different sizes or structures, such as rectangular metal casings for electronic devices, polyhedral parts, and complex irregularly shaped parts with protrusions or recesses, each requires a custom-designed and manufactured fixture. This results in high fixture design and manufacturing costs and long production cycles, increasing production investment for enterprises. Second, when switching production lines to produce different product models, replacing traditional fixtures is cumbersome. It requires manual disassembly of numerous parts from the old fixture, installation of the new fixture, and recalibration. This process is time-consuming and labor-intensive, not only consuming valuable machine tool processing time but also significantly reducing production efficiency. Furthermore, traditional custom-designed fixtures are not adaptable to complex irregularly shaped parts, further exacerbating the problems of high costs and low efficiency in the production process, failing to meet the demands of modern manufacturing for flexible production. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a flexible clamp.

[0004] The technical solution adopted by this utility model is as follows: a flexible fixture, including a worktable; a base is installed on the worktable, and a flexible module unit is installed on the base. Each flexible module unit can be assembled and connected with another flexible module unit. Each flexible module unit includes a module shell, a telescopic top block, a shaft seat, and a rotary drive limiting component. The module shell has a guide hole along its length, and a telescopic top block that can move along the length of the guide hole is adapted to be installed in the guide hole. The rotary drive limiting component includes a screw, and the rear end of the screw is screwed to a screw hole opened along the inner axis of the telescopic top block.

[0005] The rotary drive limiting assembly also includes a limiting post integrally formed with the screw and a throttle handle disposed at the front end of the screw; wherein the front end face of the limiting post is in contact with the rear end face of the bearing seat.

[0006] The bearing seat includes a bushing fitted inside it, and the end of the screw away from the telescopic top block is fitted inside the bushing.

[0007] The module housing also includes a support platform integrally formed with it on the front side, and the shaft seat is fixedly set on the support platform; a first dovetail groove is opened on the top of the module housing, a second dovetail groove is opened on the right side of the module housing, a first dovetail tenon is formed by the downward protrusion of the lower end of the module housing, and a second dovetail tenon is formed by the left end of the module housing protruding to the left.

[0008] The vertical assembly connection between the flexible module units is specifically such that the first dovetail tenon of the module shell of one flexible module unit is adapted to the first dovetail groove of the module shell of another flexible module unit, at which time the lower end face of the module shell of the upper flexible module unit is in contact with the upper end face of the module shell of the lower flexible module unit.

[0009] Specifically, the lateral assembly connection between the flexible module units is such that the second dovetail tenon of the module shell of one flexible module unit is adapted to the second dovetail groove of the module shell of another flexible module unit; at this time, the right end face of the module shell of the flexible module unit on the left side is in contact with the left end face of the module shell of the flexible module unit on the right side.

[0010] The base is fixed to the workbench by a pin in the pin hole on its edge. A third dovetail groove with the same structure and size as the first dovetail groove is arrayed on the upper part of the base along its length. The assembly connection between the base and the flexible module unit is as follows: the first dovetail tenon of the module shell of the flexible module unit is adapted to the third dovetail groove; at this time, the lower end face of the module shell of the flexible module unit is in contact with the upper end face of the base.

[0011] Both the first and third dovetail grooves have grooves on the lower side of their front walls. The front end of the first dovetail tenon protrudes forward to form a protrusion. When the first dovetail tenon of the module housing of one flexible module unit is adapted to the first dovetail groove of the module housing of another flexible module unit, the protrusion formed by the front end of the first dovetail tenon protruding forward enters the groove on the lower side of the front wall of the first dovetail groove and is adapted to the connection. When the first dovetail tenon of the module housing of one flexible module unit is adapted to the third dovetail groove, the protrusion formed by the front end of the first dovetail tenon protruding forward enters the groove on the lower side of the front wall of the third dovetail groove and is adapted to the connection.

[0012] The telescopic top block is a columnar structure with square front and rear ends, and the cross-sectional shape of the guide hole is consistent with the front and rear ends of the telescopic top block.

[0013] The telescopic top block is a columnar structure with a square front face and an arc-shaped concave surface on the rear face.

[0014] Beneficial effects: 1. In view of the shortcomings of traditional fixtures in the background technology, such as poor versatility and the need to design special fixtures for different parts, this flexible fixture has a structure in which flexible modular units can be assembled and connected to each other. With the design that the telescopic top block in each flexible modular unit can move along the length of the guide hole, the splicing method of the flexible modular units and the extension of the telescopic top block can be adjusted according to parts of different sizes and structures. This enables stable clamping of rectangular metal shells, polyhedral parts, and complex irregular parts with protrusions or recesses. There is no need to design special fixtures for each part, which effectively solves the problems of poor versatility and insufficient adaptability of traditional fixtures and improves the applicability of the fixture. 2. Addressing the shortcomings of traditional fixture replacement processes in the background technology, which are cumbersome, time-consuming, and labor-intensive, resulting in low production efficiency, this flexible fixture utilizes flexible modular units that are assembled and connected through dovetail tenons and dovetail grooves. When changing fixtures, only the splicing and combination of flexible modular units needs to be adjusted, or a small number of modules need to be disassembled and installed. This eliminates the need to disassemble a large number of parts or perform complex positioning and calibration operations, enabling rapid fixture changeovers, reducing machine tool downtime, effectively solving the problem of low efficiency in traditional fixture replacement, and improving overall production efficiency. 3. Addressing the shortcomings of traditional dedicated fixtures in the background technology, which involve high design and manufacturing costs and increase enterprise production investment, this flexible fixture features a simple and reusable flexible modular unit structure. It eliminates the need to redesign and manufacture new fixtures for different parts, reducing fixture design and manufacturing costs. Simultaneously, it reduces the enterprise's inventory needs for dedicated fixtures, lowering inventory management costs and effectively solving the problem of high costs associated with traditional fixtures, thus reducing production investment for enterprises. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the flexible modular unit of this utility model; Figure 3 This is a three-dimensional structural diagram of the base of this utility model; Figure 4 This is a left view of the two flexible module units at the bottom of this utility model when they are vertically assembled; Figure 5 for Figure 4 Sectional view of AA in the middle; Figure 6 This is a front view of the two flexible module units of this utility model when they are assembled laterally; Figure 7 for Figure 6 Cross-sectional view of the middle section (BB); Figure 8 This is a three-dimensional structural diagram of the module housing of this utility model; Figure 9 This is a three-dimensional structural diagram of the rotary drive limiting component of this utility model; Figure 10 This is a three-dimensional structural diagram of the bearing seat of this utility model; Figure 11 This is a three-dimensional structural diagram of the first embodiment of the telescopic top block of this utility model; Figure 12 This is a three-dimensional structural diagram of the second embodiment of the telescopic top block of this utility model; The markings in the diagram are: 1. Workbench; 2. Base; 21. Third dovetail groove; 3. Flexible module unit; 4. Module shell; 41. Support platform; 42. First dovetail groove; 43. Second dovetail groove; 44. First dovetail tenon; 45. Second dovetail tenon; 5. Guide through hole; 6. Telescopic top block; 61. Screw hole; 7. Shaft seat; 71. Shaft sleeve; 8. Rotary drive limiting assembly; 81. Screw; 82. Limiting post; 83. Turn handle; 9. Groove; 10. Protrusion; 101. Arc-shaped concave surface. Detailed Implementation

[0016] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. For example... Figure 1-12 As shown, the technical solution adopted by this utility model is: a flexible fixture, including a worktable 1; a base 2 is installed above the worktable 1, and a flexible module unit 3 is installed above the base 2. Each flexible module unit 3 can be assembled and connected with another flexible module unit 3. Each flexible module unit 3 includes a module housing 4, a telescopic top block 6, a shaft seat 7, and a rotary drive limiting component 8. The module housing 4 has a guide hole 5 opened along its length direction inside, and a telescopic top block 6 that can move along the length direction of the guide hole 5 is adapted to be installed in the guide hole 5. The rotary drive limiting component 8 includes a screw 81, and the rear end of the screw 81 is screwed to a screw hole 61 opened along the inner axis direction of the telescopic top block 6. The principle of this setting is: the base 2 provides an installation foundation for the flexible module unit 3, and the flexible module unit 3 can be assembled with each other to adapt to parts of different sizes; the guide hole 5 of the module housing 4 limits the movement direction of the telescopic top block 6, ensuring that it only moves along the length direction. In actual operation, the operator drives the screw 81 to rotate. Since the rear end of the screw 81 is screwed into the screw hole 61 of the telescopic top block 6, the rotational motion of the screw 81 can be converted into the linear motion of the telescopic top block 6 along the guide hole 5. Specifically, when the screw 81 is rotated clockwise, the telescopic top block 6 extends outward along the guide hole 5 to approach and clamp the part; when the screw 81 is rotated counterclockwise, the telescopic top block 6 retracts inward along the guide hole 5 to release the part, thus realizing the clamping and release of different parts to meet processing requirements.

[0017] The rotary drive limiting assembly 8 also includes a limiting post 82 integrally formed with the screw 81 and a handle 83 disposed at the front end of the screw 81; wherein, the front end face of the limiting post 82 is in contact with the rear end face of the bearing seat 7; in this configuration, the function of the handle 83 is to facilitate the operator to apply force to rotate the screw 81, and by rotating the handle 83, the screw 81 is driven to rotate, thereby driving the telescopic top block 6 to extend or retract along the guide through hole 5, thereby realizing the clamping or loosening of the parts. The core function of the limiting post 82 is to prevent the screw 81 from reversing after clamping the part, which would cause the fixture to loosen: When the telescopic top block 6 extends to clamp the workpiece, the workpiece will exert a reverse force on the telescopic top block 6. This force is transmitted to the screw 81 through the screw hole 61, causing the screw 81 to tend to reverse. The front end face of the limiting post 82, which is integrally formed with the screw 81, is always in contact with the rear end face of the bearing 7. At this time, the reverse force will increase the friction between the limiting post 82 and the bearing 7. This friction can counteract the reversing tendency of the screw 81 and prevent the screw 81 from rotating, thereby ensuring that the telescopic top block 6 continuously and stably clamps the part and avoids the fixture from loosening during the processing, which would affect the accuracy.

[0018] The bearing seat 7 includes a bushing 71 fitted inside it, and the end of the screw 81 away from the telescopic top block 6 is fitted inside the bushing 71. In this arrangement, the bushing 71 is installed inside the bearing seat 7, and the end of the screw 81 away from the telescopic top block 6 is fitted into the bushing 71. Its function is to provide stable radial support for the screw 81, ensure that the screw 81 always maintains coaxiality during rotation, and avoid the screw 81 from shifting its fit with the screw hole 61 of the telescopic top block 6 due to radial shaking.

[0019] The module housing 4 also includes a support platform 41 integrally formed with it on the front side, and the bearing seat 7 is fixedly set above the support platform 41. A first dovetail groove 42 is opened on the top of the module housing 4, a second dovetail groove 43 is opened on the right side of the module housing 4, a first dovetail tenon 44 is formed by the downward protrusion of the lower end of the module housing 4, and a second dovetail tenon 45 is formed by the left end of the module housing 4. In this arrangement, the support platform 41 is integrally formed with the module housing 4, the structure is solid, and it can provide a stable installation platform for the bearing seat 7. The bearing seat 7 is a key component that supports the rotation of the screw 81. Therefore, the support platform 41 can indirectly ensure the stability of the transmission of the screw 81 and prevent the bearing seat 7 from shifting and affecting the transmission cooperation between the screw 81 and the telescopic top block 6. In addition, the structural design of the first dovetail groove 42, the second dovetail groove 43, the first dovetail tenon 44, and the second dovetail tenon 45 provides an adaptation interface for the horizontal and vertical assembly between the flexible module units 3: through the cooperation of the dovetail structure, multiple module units can be flexibly spliced ​​together, and the overall size of the fixture can be adjusted, laying the foundation for subsequent adaptation of different parts and multi-directional clamping.

[0020] The vertical assembly connection between the flexible module units 3 is specifically as follows: the first dovetail tenon 44 of the module housing 4 of one flexible module unit 3 is adapted to the first dovetail groove 42 of the module housing 4 of another flexible module unit 3. At this time, the lower end face of the module housing 4 of the upper flexible module unit 3 is in contact with the upper end face of the module housing 4 of the lower flexible module unit 3. This structure is used to realize the vertical assembly of the flexible module units 3, providing a base for the installation of transmission components for clamping parts of different heights. During installation, the operator inserts the first dovetail tenon 44 at the lower end of the upper module housing 4 from the front end of the first dovetail groove 42 above the lower module housing 4, and pushes it along the groove until it is fully embedded. At this time, the end faces of the upper and lower module housings 4 are in contact. This assembly method can ensure that the guide through holes 5, screws 81 and other transmission components of the upper and lower modules are in a stable relative position, avoiding the inability of the transmission components to cooperate properly due to assembly deviations. At the same time, vertical assembly can increase the clamping height range of the fixture, allowing parts of different heights to be clamped by driving the telescopic top block 6 through the screw 81 of the corresponding module, improving the adaptability of the fixture.

[0021] Specifically, the lateral assembly connection between the flexible module units 3 is as follows: the second dovetail tenon 45 of the module housing 4 of one flexible module unit 3 is adapted to connect with the second dovetail groove 43 of the module housing 4 of another flexible module unit 3; at this time, the right end face of the module housing 4 of the left flexible module unit 3 is in contact with the left end face of the module housing 4 of the right flexible module unit 3. This structure is used to realize the lateral assembly of the flexible module units 3, providing a base for the installation of transmission components for clamping parts of different widths. During installation, the operator inserts the second dovetail tenon 45 on the left side of the left module housing 4 into the upper port of the second dovetail groove 43 on the right side of the right module housing 4, and pushes it along the groove until it is fully embedded, at which point the end faces of the left and right module housings 4 are in contact. This assembly method can ensure that the transmission components such as the screws 81 and telescopic top blocks 6 of the left and right modules maintain a stable lateral arrangement, avoiding assembly deviations from affecting transmission accuracy; at the same time, the lateral assembly can expand the clamping width range of the fixture, allowing parts of different widths to be clamped together by the telescopic top blocks 6 of the left and right modules, ensuring the clamping stability of the parts in the lateral direction and meeting processing requirements.

[0022] The base 2 is fixed to the workbench 1 by means of pins in the pin holes on its edge. A third dovetail groove 21, identical in structure and size to the first dovetail groove 42, is arrayed along the length of the base 2. Specifically, the assembly connection between the base 2 and the flexible module unit 3 is such that the first dovetail tenon 44 of the module housing 4 of the flexible module unit 3 is fitted into the third dovetail groove 21. At this time, the lower end face of the module housing 4 of the flexible module unit 3 is in contact with the upper end face of the base 2. In this configuration, when installing the base 2, the operator aligns the base 2 with the pre-set hole on the workbench 1 and tightens it with pins through the pin holes on the edge of the base 2 to ensure that the base 2 is fixed in place, providing a stable mounting base for the transmission components of the module unit. When installing the module unit, the operator inserts the first dovetail tenon 44 at the lower end of the module housing 4 into the opening of the third dovetail groove 21 of the base 2 and pushes it until it is fully embedded. At this time, the module housing 4 is in contact with the end face of the base 2. The third dovetail groove 21 of the array allows the operator to adjust the installation position of the module unit according to the size of the part to adapt to clamping parts of different specifications or shapes. When installing multiple adjacent flexible module units 3 on the base 2, the specific operation method is as follows: first, assemble multiple flexible module units 3 horizontally, and then the operator holds the two ends of the assembled flexible module unit 3 with both hands, and inserts the first dovetail tenon 44 of each assembled flexible module unit 3 from back to front into the opening end of the third dovetail groove 21 of the base 2 and pushes it until it is fully embedded in the third dovetail groove 21. When installing multiple adjacent flexible module units 3 vertically on the horizontally assembled flexible module unit 3.

[0023] Both the first dovetail groove 42 and the third dovetail groove 21 have grooves 9 on the lower side of their front walls. The front end of the first dovetail tenon 44 protrudes forward to form a protrusion 10. When the first dovetail tenon 44 of the module housing 4 of one flexible module unit 3 is adapted to the first dovetail groove 42 of the module housing 4 of another flexible module unit 3, the protrusion 10 formed by the front end of the first dovetail tenon 44 protruding forward enters the groove 9 on the lower side of the front wall of the first dovetail groove 42 and is adapted to the connection. When the first dovetail tenon 44 of the module housing 4 of one flexible module unit 3 is adapted to the third dovetail groove 21, the protrusion 10 formed by the front end of the first dovetail tenon 44 protruding forward enters the groove 9 on the lower side of the front wall of the third dovetail groove 21 and is adapted to the connection. In this configuration, the core function of the protrusion 10 and the groove 9 in this structure is to prevent the flexible module unit 3 from shifting up and down, and at the same time enhance the tightness of the fit under the clamping reaction force. In specific operation, during assembly, the operator inserts the dovetail tenon from the front end of the groove and pushes it until it is fully fitted; at this time, the protrusion 10 and the groove 9 fit together perfectly. After assembly, the protrusion 10 is embedded in the groove 9, which can directly restrict the relative movement between the flexible module units 3 (or between the flexible module unit 3 and the base 2) in the vertical direction, preventing the module from loosening under slight impact from gravity or external forces. When the clamp clamps the part, the reaction force generated by the part on the telescopic top block 6 will be transmitted to the dovetail connection part through the module shell 4, so that a greater squeezing force is generated between the mating surfaces of the protrusion 10 and the groove 9, further enhancing the tightness of the fit between the two and avoiding gaps in the connection part; this tight fit can ensure that the screw 81 in the module and the telescopic top block 6 always maintain the correct transmission axis, preventing the screw 81 and the screw hole 61 from being misaligned and the telescopic top block 6 from jamming due to module displacement, ensuring the stable operation of the transmission component, and ultimately ensuring the reliability of part clamping and processing accuracy, fully demonstrating the practicality of this utility model in actual processing scenarios.

[0024] The telescopic top block 6 is a columnar structure with square front and rear end faces. The cross-sectional shape of the guide through hole 5 is consistent with the front and rear end faces of the telescopic top block 6. In this configuration, the front and rear end faces of the telescopic top block 6 are square and match the cross-section of the guide through hole 5. On the one hand, this can prevent the telescopic top block 6 from rotating in the guide through hole 5, ensuring that it only moves along the length direction. This allows the rotational motion of the screw 81 to be accurately converted into the linear motion of the telescopic top block 6, avoiding transmission deviation caused by rotation.

[0025] like Figure 12As shown, the telescopic top block 6 is a columnar structure with a square front face, and the rear face of the telescopic top block 6 has an arc-shaped concave surface 101. In this configuration, the arc-shaped concave surface 101 on the rear face of the telescopic top block 6 is designed to accommodate parts with arc-shaped surfaces, such as arc-shaped column parts. When clamping such parts, the arc-shaped concave surface 101 can fit against the arc-shaped surface of the part, increasing the contact area and making the clamping force of the telescopic top block 6 on the part more uniform, thus preventing the part from sliding due to mismatch of the clamping surfaces.

[0026] Furthermore, to ensure stable and reliable transmission between the screw 81 and the screw hole 61 during use of this flexible fixture, and to prevent excessive deformation due to force from affecting the clamping effect, the screw 81 and the screw hole 61 must possess sufficient structural rigidity to adapt to the clamping force requirements of conventional machining scenarios, thus ensuring the overall stability and service life of the fixture. Simultaneously, through modular and flexible assembly and precise transmission design, this fixture can efficiently meet the machining and clamping needs of various types of small to medium batches of parts. In conventional precision machining scenarios, it can fully leverage its advantages of flexibility and easy changeover, providing strong support for improving production efficiency.

[0027] Example 1: Clamping a small planar part. The operator first fixes the base 2 in two opposite directions on the workbench 1. Each base 2 is locked to the workbench 1 by a pin. A flexible module unit 3 is selected on each of the two bases 2. The first dovetail tenon 44 of the module unit is inserted into the third dovetail groove 21 of its respective base 2 and pushed tightly, ensuring that the lower end face of the module housing 4 is in contact with the base 2. Simultaneously, the protrusion 10 of the first dovetail tenon 44 is embedded into the groove 9 of the third dovetail groove 21 for positioning. Then, the operator rotates the handles 83 of the two modules respectively. The handles 83 drive the screw 81 to rotate. The screw 81, through its engagement with the screw hole 61 of the telescopic top block 6, drives the telescopic top block 6, whose front and rear end faces are square, to extend along the guide through hole 5. The two telescopic top blocks 6 synchronously approach the small planar part from opposite directions until their front ends are in contact with the two sides of the part, forming a bidirectional clamping force. At this time, the reaction force of the part on the two telescopic top blocks 6 causes the corresponding screw 81 to have a reverse rotation tendency. The friction between the limiting post 82 and the shaft seat 7 respectively cancels the reverse rotation tendency. The cooperation between the protrusion 10 and the groove 9 further strengthens the connection between the module and the base 2 and prevents displacement. After the processing is completed, turn the handle 83 counterclockwise to retract the telescopic top block 6, and the part can be removed.

[0028] Example 2: Based on Example 1, to clamp a medium-sized part with an arc-shaped surface, the number of flexible module units 3 and the structure of the telescopic top block 6 need to be adjusted. On two bases 2 in opposite directions of the workbench 1, an appropriate number of flexible module units 3 are installed. First, the first dovetail tenon 44 of each module unit is inserted into the third dovetail groove 21 of the corresponding base 2 for fixation. Then, through the first dovetail groove 42 of the module housing 4, a corresponding number of modules are vertically spliced ​​on the module unit of each base 2, forming two sets of opposing multi-clamping point structures. Simultaneously, the telescopic top block 6 is replaced with one whose rear end has an arc-shaped concave surface 101. During operation, the operator simultaneously rotates the handle 83 of both sets of modules. The handle 83 drives the screw 81 to rotate, and the screw 81 drives the telescopic top block 6 to extend along the guide through hole 5. Multiple telescopic top blocks 6 in opposite directions simultaneously approach from the outside of the arc-shaped part, and the arc-shaped concave surface 101 fits against the outer arc surface of the part, forming a bidirectional encircling clamping force. The bushing 71 provides radial support for the screw 81 to prevent it from shaking when rotating. The friction between the limiting post 82 and the bearing 7 prevents the screw 81 from reversing. The engagement of the protrusion 10 and the groove 9 prevents the module from shifting up and down. The balance of bidirectional forces keeps the part stable and fixed. After processing, the handle 83 is rotated in the opposite direction to retract the telescopic top block 6, and the part can be removed.

[0029] Example 3: Based on Example 1, for large, irregularly shaped polyhedral parts, the installation position of the base 2 and the splicing method of the flexible module unit 3 need to be adjusted. The bases 2 in opposite directions of the workbench 1 are changed to a diagonal arrangement. An appropriate number of flexible module units 3 are installed on each base 2. First, the module units are fixed to the base 2 via the third dovetail groove 21. Then, a corresponding number of modules are horizontally spliced ​​onto the module units of each base 2 via the second dovetail groove 43 of the module housing 4, forming two sets of opposing multi-clamping point structures. During operation, the operator rotates the handle 83 of each module. The handle 83 drives the screw 81 to rotate, and the screw 81 drives the telescopic top blocks 6, whose front and rear end faces are square, to extend along the guide through hole 5. Based on the distribution of the convex and flat surfaces of the polyhedral part, the extension amount of the telescopic top blocks 6 of different modules is adjusted so that the multiple telescopic top blocks 6 in opposite directions respectively fit against the flat and convex sides of the part, forming a diagonal bidirectional clamping force. The guide hole 5 restricts the rotation of the telescopic top block 6 to ensure accurate extension direction. The limit post 82 ensures that each telescopic top block 6 maintains clamping force continuously. The cooperation between the protrusion 10 and the groove 9 strengthens the connection between the module and the base 2, and between modules. The bidirectional force cancels the influence of processing vibration and avoids the displacement of parts. After processing, the handle 83 is rotated in reverse order to retract the telescopic top block 6 and the parts can be removed.

Claims

1. A flexible clamp, comprising a worktable; characterized in that: A base is installed above the workbench, and flexible module units are installed above the base. Each flexible module unit can be assembled and connected with another flexible module unit. Each flexible module unit includes a module shell, a telescopic top block, a shaft seat, and a rotary drive limiting component. The module shell has a guide hole along its length, and a telescopic top block that can move along the length of the guide hole is adapted to be installed in the guide hole. The rotary drive limiting component includes a screw, and the rear end of the screw is screwed to a screw hole opened along the inner axis of the telescopic top block.

2. The flexible clamp according to claim 1, characterized in that: The rotary drive limiting assembly also includes a limiting post integrally formed with the screw and a throttle handle disposed at the front end of the screw; wherein the front end face of the limiting post is in contact with the rear end face of the bearing seat.

3. A flexible clamp according to claim 2, characterized in that: The bearing seat includes a bushing fitted inside it, and the end of the screw away from the telescopic top block is fitted inside the bushing.

4. A flexible clamp according to claim 1, characterized in that: The module housing also includes a support platform integrally formed with it on the front side, and the shaft seat is fixedly set on the support platform; a first dovetail groove is opened on the top of the module housing, a second dovetail groove is opened on the right side of the module housing, a first dovetail tenon is formed by the downward protrusion of the lower end of the module housing, and a second dovetail tenon is formed by the left end of the module housing protruding to the left.

5. A flexible clamp according to claim 4, characterized in that: The vertical assembly connection between the flexible module units is as follows: the first dovetail tenon of the module shell of one flexible module unit is adapted to the first dovetail groove of the module shell of another flexible module unit. At this time, the lower end face of the module shell of the upper flexible module unit is in contact with the upper end face of the module shell of the lower flexible module unit.

6. A flexible clamp according to claim 4, characterized in that: The lateral assembly connection between the flexible module units is specifically as follows: the second dovetail tenon of the module shell of one flexible module unit is adapted to the second dovetail groove of the module shell of another flexible module unit; at this time, the right end face of the module shell of the flexible module unit on the left side is in contact with the left end face of the module shell of the flexible module unit on the right side.

7. A flexible clamp according to claim 5, characterized in that: The base is fixed to the workbench by the pin holes on its edge and the pins. A third dovetail groove with the same structure and size as the first dovetail groove is arrayed on the upper part of the base along its length. The assembly connection between the base and the flexible module unit is as follows: the first dovetail tenon of the flexible module unit's housing is adapted to the third dovetail groove; at this time, the lower end face of the flexible module unit's housing is in contact with the upper end face of the base.

8. A flexible clamp according to claim 7, characterized in that: Both the first and third dovetail grooves have grooves on the lower side of their front walls. The front end of the first dovetail tenon protrudes forward to form a protrusion. When the first dovetail tenon of the module housing of one flexible module unit is adapted to the first dovetail groove of the module housing of another flexible module unit, the protrusion formed by the front end of the first dovetail tenon protruding forward enters the groove on the lower side of the front wall of the first dovetail groove and is adapted to the connection. When the first dovetail tenon of the module housing of one flexible module unit is adapted to the third dovetail groove, the protrusion formed by the front end of the first dovetail tenon protruding forward enters the groove on the lower side of the front wall of the third dovetail groove and is adapted to the connection.

9. A flexible clamp according to claim 1, characterized in that: The telescopic top block is a columnar structure with square front and rear ends, and the cross-sectional shape of the guide through hole is consistent with the front and rear ends of the telescopic top block.

10. A flexible clamp according to claim 1, characterized in that: The telescopic top block is a columnar structure with a square front face and an arc-shaped concave surface on the rear face.

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