A mechanical clamping device

Abstract

A mechanical clamping device includes a working platform, a base, a drive assembly, and multiple clamping mechanisms. The working platform is located at the top opening of the base. The drive assembly is located inside the base and includes a meshing turbine and a worm gear. A groove is formed on the top end face of the turbine, and the distance from the groove to the center of the disc section gradually increases from one end to the other. The clamping mechanisms include an L-shaped pressure block, a return spring, and a push rod. The L-shaped pressure block includes a vertically connected pressure block and a vertical block. The pressure block is located above the working platform. The middle part of the vertical block is movably connected to the outer wall of the top of the base via a pin, and the bottom of the vertical block is connected to the outer wall of the middle part of the base via a return spring. One end of the push rod is equipped with a slider that can slide along the groove, and the other end of the push rod extends from an outlet on the bottom side wall of the base to the part of the vertical block located between the pin and the return spring. This design enables automatic and rapid workpiece clamping, is simple to operate, and has high clamping efficiency and consistency.

Description

Technical Field

[0001] This invention belongs to the field of machining technology, specifically relating to a mechanical clamping device that is suitable for improving the efficiency of clamping parts. Background Technology

[0002] Plate-shaped parts are frequently used in machining. A large number of plate-shaped parts of varying lengths and shapes are machined into shape on machine tools. During machining, clamping and positioning problems are often encountered. In the common machining process of plate-shaped parts, the fixing and clamping of plate-shaped parts are usually achieved by using clamping blocks and bolts to fix the parts in multiple locations.

[0003] Chinese Patent Application No. 201510734034.8 discloses an adaptive flexible clamp for PCBAs. In this invention, a worm gear transmission mechanism is directly connected to a rotary table, enabling unidirectional control of the rotary table. Multiple movable bayonets are installed on the rotary table for clamping PCBA boards, and each movable bayonet is equipped with a movable bracket for connection to the rotary table. However, the clamping process of the movable bayonets is cumbersome and inefficient. Furthermore, this flexible clamp lacks a leveling function, making it prone to processing errors due to component clamping errors, leading to an increase in defective products. Therefore, the existing technology suffers from difficulties in clamping operations and low work efficiency. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the prior art by providing a mechanical clamping device that is simple to operate and highly efficient.

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

[0006] A mechanical clamping device includes a working platform, a base, a drive assembly, and multiple clamping mechanisms. The base is a barrel-shaped structure with an open top. The working platform is located at the top opening of the base. The drive assembly is located inside the base and includes a turbine and a worm gear. The worm gear is rotatably mounted inside the bottom end of the base. The turbine includes a disc section and a meshing section. A groove is formed on the top end face of the disc section, and the distance from the groove to the center of the disc section gradually increases from one end to the other. The bottom end of the disc section is fixedly connected to the top end of the meshing section, and the outer wall of the meshing section is connected to the worm gear. The middle outer walls mesh with each other. The multiple clamping mechanisms are evenly arranged around the opening at the top of the base. The clamping mechanism includes an L-shaped pressure block, a return spring, and a push rod. The L-shaped pressure block includes a pressure block and a vertical block. One end of the pressure block is located above the working platform, and the other end of the pressure block is vertically connected to the top of the vertical block. The middle part of the vertical block is movably connected to the top outer wall of the base through a pin. The bottom of the vertical block is connected to the middle outer wall of the base through a return spring. One end of the push rod is provided with a slider that can slide along the inclined groove. The other end of the push rod extends from the outlet opened on the bottom side wall of the base to the part of the vertical block located between the pin and the return spring.

[0007] The base has multiple first bolt holes axially arranged around its circumference at the top opening, and the working platform has multiple first mounting grooves axially arranged around its circumference at the bottom end. A leveling bolt is provided inside the first mounting groove, the top of the head of the leveling bolt contacts the inner wall of the top of the first mounting groove, and the shank of the leveling bolt is threadedly connected to the first bolt hole.

[0008] The top opening of the base has multiple second bolt holes axially arranged around its circumference. The second bolt holes are spaced apart from the first bolt holes. The top of the working platform has multiple second mounting slots axially arranged around its circumference. The second mounting slots are spaced apart from the first mounting slots. A fixing bolt is installed inside the second mounting slot. The bottom end of the head of the fixing bolt contacts the inner wall of the bottom end of the second mounting slot. The shank of the fixing bolt passes through a third bolt hole opened at the bottom end of the second mounting slot and is threaded into the second bolt hole.

[0009] The mechanical clamping device also includes multiple positioning screws. Multiple supports are arranged around the top of the work platform. The supports are spaced apart from the L-shaped pressure blocks. The shank of the positioning screw passes through the fourth threaded hole on the support and abuts against the side wall of the workpiece placed on the work platform. An adjusting spring is sleeved on the shank of the positioning screw. The two ends of the adjusting spring are respectively connected to the head of the positioning screw and one side of the support.

[0010] The top of the work platform has multiple dovetail grooves around its circumference. The dovetail grooves are arc-shaped. The outer wall of the bottom end of the support fits into the inner wall of the dovetail groove, and the support can slide along the dovetail groove.

[0011] The drive assembly also includes an intermediate shaft and a positioning sleeve. The intermediate shaft includes a first section, a second section, and a third section. The bottom end of the first section is fixedly connected to the top end of the second and third sections through the top end of the second and third sections. The diameters of the first and third sections are both smaller than the diameter of the second section. The first and third sections are respectively inserted into the middle of the working platform and the top end of the positioning sleeve. The bottom of the positioning sleeve is installed at the bottom middle of the base. The turbine is sleeved on the outside of the positioning sleeve, and an intermediate bearing is provided between the turbine and the positioning sleeve.

[0012] An annular stop is provided on the outer wall of the middle part of the second section, and an annular protrusion is provided on the inner wall of the top of the inner hole of the disc section. The annular protrusion is located between the annular stop and the positioning sleeve, and the bottom end face of the annular protrusion is in contact with the top end face of the positioning sleeve.

[0013] The intermediate shaft also includes a fourth section, the top and bottom of which are fixedly connected to the bottom of the first section and the top of the second section, respectively. The diameter of the fourth section is larger than that of the first section and smaller than that of the second section. A baffle is fitted on the outside of the fourth section. The inner circumference of the bottom end of the baffle contacts the top of the second section, and the outer circumference of the bottom end of the baffle contacts the stepped structure provided on the inner wall of the base.

[0014] The working platform has a grid-like structure, the turbine has an I-shaped structure, and the bottom end of the disc section is fixedly connected to the top end of the meshing section through a transition section.

[0015] Bearings are fitted on both ends of the worm gear, and one end of the worm gear is connected to the power mechanism in sequence through a connecting pin and a connector.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. The present invention provides a mechanical clamping device comprising a working platform, a base, a drive assembly, and multiple clamping mechanisms. The base is a barrel-shaped structure with an open top. The working platform is located at the top opening of the base. The drive assembly is located inside the base and includes a turbine and a worm gear. The worm gear is rotatably located inside the bottom end of the base. The turbine includes a disc section and a meshing section. A groove is formed on the top end face of the disc section. The distance from the groove to the center of the disc section gradually increases from one end to the other. The bottom end of the disc section is fixedly connected to the top end of the meshing section. The outer wall of the meshing section meshes with the middle outer wall of the worm gear. Multiple clamping mechanisms are evenly arranged around the circumference of the top opening of the base. Each clamping mechanism includes an L-shaped pressure block, a return spring, and a push rod. The L-shaped pressure block includes a pressure block and a vertical block. One end of the pressure block is located above the working platform, and the other end of the pressure block is vertically connected to the top of the vertical block. The middle part of the vertical block is movably connected to the top outer wall of the base via a pin. The bottom of the vertical block is connected via... The return spring is connected to the outer wall of the middle part of the base. One end of the push rod is equipped with a slider that can slide along the inclined groove. The other end of the push rod extends from the outlet on the bottom side wall of the base to the part on the vertical block located between the pin and the return spring. When it is necessary to clamp the workpiece, the workpiece is first placed on the work platform, and then the worm gear is rotated clockwise. The worm gear drives the turbine to rotate, and the turbine rotation drives the slider to slide from one end of the groove near the center of the disc section to the other end of the groove. At the same time, the push rod extends and abuts against the part on the vertical block located between the pin and the return spring, pushing the bottom of the vertical block to rise. The pressure block located at the top of the vertical block presses down tightly on the workpiece. This design uses the turbine and worm gear to drive the pressure blocks in multiple clamping mechanisms to press the workpiece tightly at the same time, resulting in high consistency in the clamping process and simple and fast clamping operation. After processing, the worm gear is rotated counterclockwise, the push rod retracts, the bottom of the vertical block is reset under the action of the return spring, the pressure block is lifted, and the processed workpiece can be removed. Therefore, this invention realizes automatic and fast workpiece clamping, with simple operation and high clamping efficiency and consistency.

[0018] 2. In the mechanical clamping device of the present invention, a plurality of first bolt holes are axially formed around the top opening of the base, and a plurality of first mounting grooves are formed around the bottom of the working platform. A leveling bolt is installed inside the first mounting groove, with the top of the head of the leveling bolt contacting the inner wall of the top of the first mounting groove. The shank of the leveling bolt is threadedly connected to the first bolt hole. This design achieves leveling of the working platform by adjusting the screw depth of the leveling bolt. A plurality of second bolt holes are axially formed around the top opening of the base, spaced apart from the first bolt holes. A plurality of second mounting grooves are formed around the top of the working platform, spaced apart from the first mounting grooves. A fixing bolt is installed inside the second mounting groove, with the bottom of the head of the fixing bolt contacting the inner wall of the bottom of the second mounting groove. The shank of the fixing bolt passes through a third bolt hole at the bottom of the second mounting groove and is threadedly connected to the second bolt hole. This design achieves good clamping accuracy by fixing the leveled working platform with the fixing bolts. Therefore, the present invention achieves leveling of the working platform and fixation after leveling, with good clamping accuracy.

[0019] 3. The mechanical clamping device of the present invention also includes multiple positioning screws. Multiple supports are arranged around the top of the work platform, with the supports spaced apart from the L-shaped pressure blocks. The shank of the positioning screw passes through a fourth threaded hole in the support and abuts against the side wall of the workpiece placed on the work platform. An adjusting spring is fitted onto the shank of the positioning screw, with both ends of the adjusting spring connected to the head of the positioning screw and one side of the support, respectively. This design achieves workpiece positioning through positioning screws spaced apart from the L-shaped pressure blocks. Multiple dovetail grooves are formed around the top of the work platform, with an arc-shaped structure. The outer wall of the bottom end of the support mates with the inner wall of the dovetail groove, allowing the support to slide along the dovetail groove. This design allows for easy adjustment of irregularly shaped parts by sliding the support along the dovetail groove to the appropriate position before positioning the workpiece using the positioning screws, resulting in high versatility. Therefore, the present invention can achieve workpiece positioning with high versatility. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention.

[0021] Figure 2 This is a longitudinal sectional view of the positioning screw in this invention.

[0022] Figure 3 This is a longitudinal sectional view of the leveling bolt and the fixing bolt in this invention.

[0023] Figure 4 This is a cross-sectional view of the present invention.

[0024] Figure 5 This is a schematic diagram of the inclined groove in this invention.

[0025] Figure 6 This is a schematic diagram of the intermediate shaft in this invention.

[0026] In the above diagram, the components are: working platform 1, first mounting slot 11, leveling bolt 12, second mounting slot 13, fixing bolt 131, bracket 14, dovetail groove 15, base 2, outlet 21, first bolt hole 22, second bolt hole 23, stepped structure 24, drive assembly 3, turbine 31, disc section 311, meshing section 312, inclined groove 313, annular protrusion 314, transition section 315, worm gear 32, bearing 321, connecting pin 322, connector 323, intermediate shaft 33, first section 331, second section 332, third section 333, annular stop 334, fourth section 335, positioning sleeve 34, intermediate bearing 35, clamping mechanism 4, L-shaped pressure block 41, pressure block 411, vertical block 412, pin 413, slider 414, return spring 42, push rod 43, positioning screw 5, adjusting spring 51, and baffle 6. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0028] See Figures 1 to 6 A mechanical clamping device includes a working platform 1, a base 2, a drive assembly 3, and multiple clamping mechanisms 4. The base 2 is a barrel-shaped structure with an open top. The working platform 1 is located at the open top of the base 2. The drive assembly 3 is located inside the base 2 and includes a turbine 31 and a worm gear 32. The worm gear 32 is rotatably located inside the bottom end of the base 2. The turbine 31 includes a disc section 311 and a meshing section 312. A groove 313 is formed on the top end face of the disc section 311. The distance from the groove 313 to the center of the disc section 311 gradually increases from one end to the other. The bottom end of the disc section 311 is fixedly connected to the top end of the meshing section 312. The outer wall of the meshing section 312 meshes with the middle outer wall of the worm gear 32. The multiple clamping mechanisms 4 are evenly arranged around the top opening of the base 2. Each clamping mechanism 4 includes an L-shaped pressure block 41, a return spring 42, and a push rod 43. The L-shaped pressure block 41 includes a pressure block 411 and a vertical block 412. One end of the pressure block 411 is located above the working platform 1, and the other end of the pressure block 411 is vertically connected to the top of the vertical block 412. The middle part of the vertical block 412 is movably connected to the outer wall of the top of the base 2 through a pin 413. The bottom of the vertical block 412 is connected to the outer wall of the middle part of the base 2 through the return spring 42. One end of the push rod 43 is provided with a slider 414 that can slide along the inclined groove 313. The other end of the push rod 43 extends from the outlet 21 opened on the bottom side wall of the base 2 to the part of the vertical block 412 located between the pin 413 and the return spring 42.

[0029] The base 2 has a plurality of first bolt holes 22 axially arranged around its circumference at the top opening, and the working platform 1 has a plurality of first mounting grooves 11 axially arranged around its bottom end. The first mounting groove 11 is provided with a leveling bolt 12 inside, the top end of the head of the leveling bolt 12 is in contact with the inner wall of the top end of the first mounting groove 11, and the rod of the leveling bolt 12 is threadedly connected to the first bolt hole 22.

[0030] The top opening of the base 2 has a plurality of second bolt holes 23 axially arranged around its circumference. The second bolt holes 23 are spaced apart from the first bolt holes 22. The top of the working platform 1 has a plurality of second mounting grooves 13 axially arranged around its circumference. The second mounting grooves 13 are spaced apart from the first mounting grooves 11. A fixing bolt 131 is provided inside the second mounting groove 13. The bottom end of the head of the fixing bolt 131 contacts the inner wall of the bottom end of the second mounting groove 13. The shank of the fixing bolt 131 passes through the third bolt hole opened at the bottom end of the second mounting groove 13 and is threadedly connected to the second bolt hole 23.

[0031] The mechanical clamping device also includes multiple positioning screws 5. Multiple supports 14 are arranged around the top of the work platform 1. The supports 14 are spaced apart from the L-shaped pressure block 41. The shank of the positioning screw 5 passes through the fourth threaded hole on the support 14 and abuts against the side wall of the workpiece placed on the work platform 1. An adjusting spring 51 is sleeved on the shank of the positioning screw 5. The two ends of the adjusting spring 51 are respectively connected to the head of the positioning screw 5 and one side of the support 14.

[0032] The top of the working platform 1 has multiple dovetail grooves 15 around its circumference. The dovetail grooves 15 are arc-shaped. The bottom outer wall of the support 14 matches the inner wall of the dovetail grooves 15, and the support 14 can slide along the dovetail grooves 15.

[0033] The drive assembly 3 further includes an intermediate shaft 33 and a positioning sleeve 34. The intermediate shaft 33 includes a first section 331, a second section 332, and a third section 333. The bottom end of the first section 331 is fixedly connected to the top end of the third section 333 through the second section 332. The diameters of the first section 331 and the third section 333 are both smaller than the diameter of the second section 332. The first section 331 and the third section 333 are respectively inserted into the middle of the working platform 1 and the top end of the positioning sleeve 34. The bottom of the positioning sleeve 34 is installed at the bottom middle of the base 2. The turbine 31 is sleeved on the outside of the positioning sleeve 34. An intermediate bearing 35 is provided between the turbine 31 and the positioning sleeve 34.

[0034] An annular stop 334 is provided on the outer wall of the middle part of the second segment 332, and an annular protrusion 314 is provided on the inner wall of the top of the inner hole of the disc segment 311. The annular protrusion 314 is located between the annular stop 334 and the positioning sleeve 34, and the bottom end face of the annular protrusion 314 is in contact with the top end face of the positioning sleeve 34.

[0035] The intermediate shaft 33 also includes a fourth segment 335. The top and bottom ends of the fourth segment 335 are fixedly connected to the bottom end of the first segment 331 and the top end of the second segment 332, respectively. The diameter of the fourth segment 335 is larger than the diameter of the first segment 331 and smaller than the diameter of the second segment 332. A baffle 6 is sleeved on the outside of the fourth segment 335. The inner circumference of the bottom end of the baffle 6 is in contact with the top end of the second segment 332, and the outer circumference of the bottom end of the baffle 6 is in contact with the stepped structure 24 provided on the inner wall of the base 2.

[0036] The working platform 1 has a grid-like structure, the turbine 31 has an I-shaped structure, and the bottom end of the disc section 311 is fixedly connected to the top end of the meshing section 312 through the transition section 315.

[0037] Bearings 321 are fitted on both ends of the worm gear 32. One end of the worm gear 32 is connected to the power mechanism in sequence through a connecting pin 322 and a connector 323.

[0038] Example 1:

[0039] See Figures 1 to 6A mechanical clamping device includes a working platform 1, a base 2, a drive assembly 3, and multiple clamping mechanisms 4. The base 2 is a barrel-shaped structure with an open top. The working platform 1 is located at the top opening of the base 2. The drive assembly 3 is located inside the base 2 and includes a turbine 31 and a worm gear 32. Bearings 321 are sleeved on both ends of the worm gear 32 and are located inside the bottom of the base 2. One end of the worm gear 32 is connected to a power mechanism in sequence through a connecting pin 322 and a connector 323. The turbine 31 is an I-shaped structure and includes a disc section 311, a transition section 315, and a meshing section 312. The bottom end of the disc section 311 is fixedly connected to the top end of the meshing section 312 through the transition section 315. A sloping groove 313 is formed on the top end face of the disc section 311, and the distance from the sloping groove 313 to the center of the disc section 311 gradually increases from one end to the other. The bottom end of the disc segment 311 is fixedly connected to the top end of the meshing segment 312. The outer wall of the meshing segment 312 meshes with the middle outer wall of the worm gear 32. The plurality of clamping mechanisms 4 are evenly arranged around the circumference of the top opening of the base 2. The clamping mechanism 4 includes an L-shaped pressure block 41, a return spring 42, and a push rod 43. The L-shaped pressure block 41 includes a pressure block 411 and a vertical block 412. One end of the pressure block 411 is located above the working platform 1, and the other end of the pressure block 411... The top of the vertical block 412 is vertically connected, and the middle part of the vertical block 412 is movably connected to the outer wall of the top of the base 2 via a pin 413. The bottom of the vertical block 412 is connected to the outer wall of the middle part of the base 2 via a return spring 42. One end of the push rod 43 is fixed with a slider 414 that can slide along the inclined groove 313. The other end of the push rod 43 extends from the outlet 21 opened on the bottom side wall of the base 2 to the part of the vertical block 412 located between the pin 413 and the return spring 42.

[0040] The aforementioned mechanical clamping device is fixed to the machine tool worktable by bolts. Its working principle is as follows: When it is necessary to clamp the workpiece, the workpiece is first placed on the work platform 1. Then, the worm gear 32 is rotated clockwise by the power mechanism. The worm gear 32 drives the turbine 31 to rotate in the forward direction. The forward rotation of the turbine 31 drives the slider 414 to slide from one end of the slide groove 313 near the center of the disc section 311 to the other end of the slide groove 313 away from the center of the disc section 311. At the same time, the push rod 43 extends out and first abuts against the part of the vertical block 412 located between the pin 413 and the return spring 42. Then, it pushes the bottom of the vertical block 412 to lift up until the pressure block 411 located at the top of the vertical block 412 tightly presses down on the workpiece, completing the workpiece clamping and entering the subsequent workpiece processing.

[0041] After the workpiece is processed, the worm gear 32 is rotated counterclockwise by the power mechanism. The worm gear 32 drives the turbine 31 to rotate in the opposite direction. The reverse rotation of the turbine 31 drives the slider 414 to slide from the end of the slide groove 313 away from the center of the disc section 311 towards the end of the slide groove 313 near the center of the disc section 311. At the same time, the push rod 43 retracts, and the bottom of the vertical block 412 is reset under the action of the return spring 42. The pressure block 411 is lifted, and the processed workpiece can be removed.

[0042] Example 2:

[0043] The difference from Example 1 is as follows:

[0044] The base 2 has multiple first bolt holes 22 and multiple second bolt holes 23 axially arranged around its top opening. The second bolt holes 23 are spaced apart from the first bolt holes 22. The bottom of the working platform 1 has multiple first mounting grooves 11 axially arranged around its bottom. The top of the working platform 1 has multiple second mounting grooves 13 axially arranged around its top. The second mounting grooves 13 are spaced apart from the first mounting grooves 11. A leveling bolt 12 is provided inside the first mounting groove 11. The top end of the head of the leveling bolt 12 contacts the inner wall of the top of the first mounting groove 11. The shank of the leveling bolt 12 is threadedly connected to the first bolt hole 22. A fixing bolt 131 is provided inside the second mounting groove 13. The bottom end of the head of the fixing bolt 131 contacts the inner wall of the bottom of the second mounting groove 13. The shank of the fixing bolt 131 passes through a third bolt hole opened at the bottom of the second mounting groove 13 and is threadedly connected to the second bolt hole 23.

[0045] Before clamping, adjust the height of the leveling bolt 12 to keep the work platform 1 level. After leveling, tighten the fixing bolt 131 and the second bolt hole 23 to fix the work platform 1 after leveling.

[0046] Example 3:

[0047] The difference from Example 1 is as follows:

[0048] The top of the work platform 1 has multiple dovetail grooves 15 around its circumference. The dovetail grooves 15 are arc-shaped. The mechanical clamping device also includes multiple positioning screws 5. The top of the work platform 1 has multiple supports 14 around its circumference. The supports 14 are spaced apart from the L-shaped pressure blocks 41. The bottom outer wall of the support 14 matches the inner wall of the dovetail groove 15. The support 14 can slide along the dovetail groove 15. The shank of the positioning screw 5 passes through the fourth threaded hole at the top of the support 14 and abuts against the side wall of the workpiece placed on the work platform 1. The shank of the positioning screw 5 is fitted with an adjusting spring 51. The two ends of the adjusting spring 51 are respectively connected to the head of the positioning screw 5 and one side of the support 14.

[0049] After clamping, slide the bracket 14 along the dovetail groove 15. After adjusting the position of the bracket 14, screw in the positioning screw 5 so that its rod abuts against the side wall of the workpiece placed on the work platform 1 to achieve the positioning of the workpiece. The adjusting spring is used to prevent the positioning screw 5 from loosening due to the vibration of the workpiece during subsequent processing.

[0050] Example 4:

[0051] The difference from Example 1 is as follows:

[0052] The drive assembly 3 further includes an intermediate shaft 33 and a positioning sleeve 34. The intermediate shaft 33 includes a first segment 331, a second segment 332, a third segment 333, and a fourth segment 335. The bottom end of the first segment 331 is fixedly connected to the top end of the third segment 333 via the fourth segment 335, the second segment 332, and the fourth segment 335. The diameter of the fourth segment 335 is equal to the diameter of the third segment 333. The diameter of the first segment 331 is smaller than the diameter of the fourth segment 335, and the diameter of the second segment 332 is larger than the diameter of the fourth segment 335. The first segment 331 and the third segment 333 are respectively inserted into the middle of the working platform 1 and the top end of the positioning sleeve 34. A protrusion is provided at the bottom of the positioning sleeve 34 and the middle of the bottom end of the base 2. The turbine 31 is fitted onto the outside of the positioning sleeve 34, and an intermediate bearing 35 is provided between the turbine 31 and the positioning sleeve 34. An annular stop 334 is provided on the outer wall of the middle part of the second section 332. An annular protrusion 314 is provided on the inner wall of the top of the inner hole of the disc section 311. The annular protrusion 314 is located between the annular stop 334 and the positioning sleeve 34. The bottom end face of the annular protrusion 314 is in contact with the top end face of the positioning sleeve 34. A baffle 6 is fitted onto the outside of the fourth section 335. The inner circumference of the bottom end of the baffle 6 is in contact with the top end of the second section 332, and the outer circumference of the bottom end of the baffle 6 is in contact with the stepped structure 24 provided on the inner wall of the base 2. The working platform 1 has a grid structure.

[0053] The intermediate shaft 33 is positioned in the middle of the clamping device. Its first section 331 is positioned at the center of the work platform 1 to limit the work platform 1, and its third section 333 is positioned inside the positioning sleeve 34 to position itself, so as to ensure that the work platform 1 does not deform during workpiece processing and thus affect the processing accuracy. The inner wall of the base 2 is provided with a stepped structure 24, and the baffle 6 is placed at the stepped structure 24 to prevent cutting waste generated during processing from falling from the work platform 1 of the grid structure into the clamping device. The baffle 6 stores cutting waste and is suitable for milling and drilling.

Claims

1. A mechanical clamping device, characterized in that: The mechanical clamping device includes a working platform (1), a base (2), a drive assembly (3), and multiple clamping mechanisms (4). The base (2) is a barrel-shaped structure with an open top. The working platform (1) is located at the open top of the base (2). The drive assembly (3) is located inside the base (2) and includes a turbine (31) and a worm gear (32). The worm gear (32) is rotatably located inside the bottom end of the base (2). The turbine (31) includes a disc section (311) and a meshing section (312). A groove (313) is provided on the top end face of the disc section (311). The distance from the groove (313) to the center of the disc section (311) gradually increases from one end to the other end. The bottom end of the disc section (311) is fixedly connected to the top end of the meshing section (312). The outer wall of the meshing section (312) meshes with the middle outer wall of the worm gear (32). The multiple clamping mechanisms... (4) The clamping mechanism (4) is evenly arranged around the opening at the top of the base (2). The clamping mechanism (4) includes an L-shaped pressure block (41), a return spring (42), and a push rod (43). The L-shaped pressure block (41) includes a pressure block (411) and a vertical block (412). One end of the pressure block (411) is located above the working platform (1), and the other end of the pressure block (411) is vertically connected to the top of the vertical block (412). The middle part of the vertical block (412) is connected by a pin ( 413) is movably connected to the outer wall of the top of the base (2), and the bottom of the vertical block (412) is connected to the outer wall of the middle part of the base (2) through the return spring (42). One end of the push rod (43) is provided with a slider (414) that can slide along the inclined groove (313). The other end of the push rod (43) extends from the outlet (21) opened on the bottom side wall of the base (2) to the part of the vertical block (412) located between the pin (413) and the return spring (42). The mechanical clamping device also includes multiple positioning screws (5). Multiple supports (14) are arranged around the top of the work platform (1). The supports (14) and L-shaped pressure blocks (41) are spaced apart. The rod of the positioning screw (5) passes through the fourth threaded hole on the support (14) and abuts against the side wall of the workpiece placed on the work platform (1). The rod of the positioning screw (5) is fitted with an adjusting spring (51). The two ends of the adjusting spring (51) are connected to the head of the positioning screw (5) and one side of the support (14), respectively. The top of the work platform (1) has multiple dovetail grooves (15) around its circumference. The dovetail grooves (15) are arc-shaped. The bottom outer wall of the support (14) is matched with the inner wall of the dovetail grooves (15). The support (14) can slide along the dovetail grooves (15).

2. The mechanical clamping device according to claim 1, characterized in that: The base (2) has a plurality of first bolt holes (22) axially arranged around its circumference at the top opening. The working platform (1) has a plurality of first mounting grooves (11) axially arranged around its bottom end. The first mounting groove (11) is provided with a leveling bolt (12). The top of the head of the leveling bolt (12) contacts the inner wall of the top of the first mounting groove (11). The rod of the leveling bolt (12) is threadedly connected to the first bolt hole (22).

3. The mechanical clamping device according to claim 2, characterized in that: The base (2) has a plurality of second bolt holes (23) axially arranged around its top opening. The second bolt holes (23) are spaced apart from the first bolt holes (22). The top of the working platform (1) has a plurality of second mounting grooves (13) axially arranged around its top. The second mounting grooves (13) are spaced apart from the first mounting grooves (11). The second mounting grooves (13) are provided with fixing bolts (131). The bottom end of the head of the fixing bolt (131) contacts the inner wall of the bottom end of the second mounting groove (13). The shank of the fixing bolt (131) passes through the third bolt hole opened at the bottom end of the second mounting groove (13) and is threadedly connected to the second bolt hole (23).

4. A mechanical clamping device according to any one of claims 1-3, characterized in that: The drive assembly (3) also includes an intermediate shaft (33) and a positioning sleeve (34). The intermediate shaft (33) includes a first section (331), a second section (332), and a third section (333). The bottom end of the first section (331) is fixedly connected to the top end of the third section (333) through the second section (332). The diameters of the first section (331) and the third section (333) are smaller than the diameter of the second section (332). The first section (331) and the third section (333) are respectively inserted into the middle of the working platform (1) and the top end of the positioning sleeve (34). The bottom of the positioning sleeve (34) is installed at the bottom middle of the base (2). The turbine (31) is sleeved on the outside of the positioning sleeve (34). An intermediate bearing (35) is provided between the turbine (31) and the positioning sleeve (34).

5. A mechanical clamping device according to claim 4, characterized in that: An annular stop (334) is provided on the outer wall of the middle part of the second segment (332), and an annular protrusion (314) is provided on the inner wall of the top of the inner hole of the disc segment (311). The annular protrusion (314) is located between the annular stop (334) and the positioning sleeve (34), and the bottom end face of the annular protrusion (314) is in contact with the top end face of the positioning sleeve (34).

6. The mechanical clamping device according to claim 4, characterized in that: The intermediate shaft (33) also includes a fourth segment (335). The top and bottom ends of the fourth segment (335) are fixedly connected to the bottom end of the first segment (331) and the top end of the second segment (332), respectively. The diameter of the fourth segment (335) is larger than the diameter of the first segment (331) and smaller than the diameter of the second segment (332). A baffle (6) is sleeved on the outside of the fourth segment (335). The inner circumference of the bottom end of the baffle (6) is in contact with the top end of the second segment (332), and the outer circumference of the bottom end of the baffle (6) is in contact with the stepped structure (24) provided on the inner wall of the base (2).

7. A mechanical clamping device according to any one of claims 1-3, characterized in that: The working platform (1) has a grid structure, the turbine (31) has an I-shaped structure, and the bottom end of the disc section (311) is fixedly connected to the top end of the meshing section (312) through the transition section (315).

8. A mechanical clamping device according to any one of claims 1-3, characterized in that: Bearings (321) are fitted on both ends of the worm gear (32), and one end of the worm gear (32) is connected to the power mechanism in sequence through a connecting pin (322) and a connector (323).

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