Electric clamping device clamping head pressing module capable of achieving full-stroke clamping at any position

Abstract

The utility model discloses a clamping head pressing module of an electric clamping device. The clamping head pressing module can achieve clamping at any position in the whole stroke. The clamping head pressing module comprises an upper shell, a self-locking worm and gear transmission assembly, a rotating shaft, a coupler and a clamping arm pressing assembly. A first mounting cavity and a second mounting cavity which are communicated are formed in the upper shell, the self-locking worm and gear transmission assembly comprises a worm gear and a worm, the coupler and the worm are located in the first mounting cavity, and the worm gear is located in the second mounting cavity; the lower portion of the worm is connected with the upper portion of the coupler, and the lower portion of the coupler is provided with a power connecting hole. A power shaft loading opening is formed in the lower part of the first mounting cavity; the self-locking worm and gear transmission assembly drives the pressing and clamping arm assembly to be opened or clamped. Compared with the prior art, the pressing and clamping arm assembly can rotate to any position in the stroke range to press a workpiece, use is flexible and convenient, the application range is wide, and clamping force is constant. The clamping device can also be combined with different power modules to form the clamping device with required performance.

Description

Technical Field

[0001] This utility model belongs to the field of clamping device technology, and in particular relates to an electric clamping device pressure chuck module that can achieve clamping at any position throughout the entire stroke. Background Technology

[0002] Clamping devices are used to clamp workpieces.

[0003] In the prior art, Chinese patent CN210451541 discloses an electric clamping device, including: a cylinder assembly, a lead screw assembly, a connecting rod assembly, and a pressure arm assembly; the cylinder assembly includes a housing, the lead screw assembly includes a lead screw and a lead screw mating block adapted to the lead screw; the connecting rod assembly includes a fork-shaped member and a connecting block that are hinged to each other, the fork-shaped member is sleeved on the outer peripheral surface of the lead screw mating block and moves along the length direction of the lead screw along with the lead screw mating block, and the pressure arm assembly includes a pressure tongue and pressure arms symmetrically arranged on both sides of the pressure tongue; when the lead screw rotates, the lead screw mating block drives the fork-shaped member to move along the length direction of the lead screw, and drives the rotating block to swing through the connecting block, thereby driving the connecting rod to rotate, and driving the pressure arm assembly to open or clamp through the connecting rod.

[0004] Existing electric clamps use a screw-driven linkage structure for force transmission, which has the following drawbacks: During clamping, the clamping force is relatively large only at the dead point position, and small at other positions. This type of electric clamp relies on the dead point position of the linkage structure for clamping. In practical use, shims need to be set to adjust the dead point position to match the required position, resulting in poor flexibility and limited applicability. Furthermore, when the bearings wear, gaps develop between components, causing the dead point position to shift and leading to a rapid decrease in clamping force, affecting the clamping effect.

[0005] Therefore, it is necessary to provide a new electric clamping head module that can achieve clamping at any position throughout the entire stroke to solve the above-mentioned technical problems. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] Based on this, the present invention provides an electric clamping head module that can achieve clamping at any position throughout the entire stroke, so as to solve the technical problems of fixed clamping point position and unstable clamping force in the existing electric clamping head part.

[0008] (II) Technical Solution

[0009] To solve the above-mentioned technical problems, this utility model proposes an electric clamping device pressure chuck module capable of clamping at any position throughout the entire stroke, comprising: an upper housing, a self-locking worm gear transmission assembly, a rotating shaft, a coupling, and a clamping arm assembly; the upper housing has a first mounting cavity and a second mounting cavity that communicate with each other, the first mounting cavity being rod-shaped in general, and the second mounting cavity being disc-shaped in general, the second mounting cavity being located on the upper side of the first mounting cavity; the self-locking worm gear transmission assembly includes a worm wheel and a worm, the worm wheel being located in the second mounting cavity; the worm is located in the first mounting cavity, the upper part of the worm being connected to the worm... The worm gear meshes with the upper part of the coupling, and the lower part of the coupling has a power connection hole. The coupling is also located in the first mounting cavity, and the lower part of the first mounting cavity has a power shaft insertion opening. The rotating shaft is coaxial with the worm gear and is also fixedly connected to the worm gear. The end of the rotating shaft extends out of the second mounting cavity. The clamping arm assembly is located outside the upper housing, and one end of the clamping arm assembly is fixed to the rotating shaft, while the other end of the clamping arm assembly is a clamping end. The rotation of the worm gear drives the worm gear to rotate, which in turn drives the clamping arm assembly to open or clamp through the rotating shaft.

[0010] Preferably, the worm gear includes, from top to bottom, a rod top mounting section, a helical tooth section, a bushing mounting section, a bearing mounting section, an external thread section, and a coupling mounting section; the joint between the helical tooth section and the bushing mounting section has a limiting step; the electric clamping head module capable of clamping at any position throughout the full stroke further includes: a first bearing, a bushing, a second bearing, a locking nut, and a limiting sleeve; the first bearing is sleeved outside the rod top mounting section, the second bearing is sleeved outside the bearing mounting section, and the worm gear is rotatably connected to the upper housing via the first bearing and the second bearing respectively; the second bearing includes an inner bearing ring and an outer bearing ring; the bushing... Located in the bushing mounting section, the upper part of the bearing inner ring abuts against the limiting step; the locking nut is located in the helical tooth section and abuts against the lower part of the bearing inner ring; the top of the limiting sleeve abuts against the lower part of the bearing outer ring; one side of the bottom of the upper housing is provided with an outer mounting hole communicating with the first mounting cavity; the lower part of the limiting sleeve is provided with an inner mounting hole opposite to the outer mounting hole; the coupling mounting section is inserted into the coupling and connected to the coupling; the lower outer part of the coupling is also provided with a coupling side locking hole communicating with the power connection hole, and the coupling side locking hole is at the same height as the inner mounting hole.

[0011] Preferably, the upper housing includes: an upper housing base, an upper housing rear side plate, and an upper housing front side cover plate; the upper housing base and the upper housing rear side plate are an integral structure; the upper housing front side cover plate and the upper housing rear side plate are detachably connected; the upper housing rear side plate is located on the upper part of the upper housing base; the upper housing rear side plate is provided with a recessed worm gear mounting rear groove that is generally semi-cylindrical; the upper housing front side cover plate is also provided with a recessed worm gear mounting front groove that is generally semi-cylindrical, located opposite the worm gear mounting rear groove; the upper housing base is also provided with a bearing mounting hole and a sleeve mounting hole; the second bearing is installed in the bearing mounting hole. The limiting sleeve is installed in the sleeve mounting hole, the outer mounting hole is located on the bottom side of the upper shell seat, and the outer mounting hole communicates with the sleeve mounting hole; the rear side plate of the upper shell is also provided with a recessed disc-shaped second mounting cavity; the front side cover plate of the upper shell is provided with a recessed disc-shaped second mounting cavity; the front side cover plate of the upper shell is fastened to the rear side plate of the upper shell, and the worm gear mounting groove, the worm gear mounting groove, the bearing mounting hole and the sleeve mounting hole together form the first mounting cavity; the disc-shaped second mounting cavity and the disc-shaped second mounting cavity together form the second mounting cavity.

[0012] Preferably, the mating surface between the upper shell seat and the front cover plate of the upper shell is stepped; a protruding rod top mounting platform is provided on one side of the top of the rear side plate of the upper shell, and the rod top mounting platform and the rear side plate of the upper shell are integral structures; a worm gear mounting hole is provided through the rod top mounting platform, the first bearing is installed in the worm gear mounting hole, the top of the worm gear extends into the worm gear mounting hole, and the top of the worm gear is rotatably connected to the rod top mounting platform via the first bearing.

[0013] Preferably, the electric clamping head module capable of clamping at any position throughout its full stroke further includes: a vertical long screw, a horizontal screw, and a horizontal positioning pin; the upper housing is also provided with a vertical threaded connection hole extending through it in the vertical direction, one end of the vertical long screw is located in the vertical threaded connection hole, and the other end of the vertical long screw extends into the front cover plate of the upper housing; the rear side plate of the upper housing is provided with a horizontal threaded connection hole and a horizontal pin hole extending through it in the front-rear direction, one end of the horizontal screw passes through the rear side plate of the upper housing, and the other end of the horizontal screw extends into the front cover plate of the upper housing, one end of the horizontal positioning pin passes through the rear side plate of the upper housing, and the other end of the horizontal positioning pin extends into the front cover plate of the upper housing.

[0014] Preferably, the clamping arm assembly includes a fixedly connected arm and a pressure rod. The end of the arm away from the pressure rod is fixedly connected to the rotating shaft. The end of the pressure rod away from the arm is the clamping end, and the clamping end is provided with a pressure block mounting hole. The number of arms is two, and the two arms are respectively fixed to both ends of the rotating shaft; or the number of arms is two, and the two arms are respectively fixed to both ends of the rotating shaft.

[0015] Preferably, the worm gear is provided with a raised positioning and limiting block, and the second mounting cavity is provided with a raised limiting arc strip. The trajectory formed by the positioning and limiting block as the worm gear rotates is the positioning block trajectory, and the positioning block trajectory is arc-shaped. The limiting arc strip is set along the positioning block trajectory. The limiting arc strip cooperates with the positioning and limiting block to limit the rotation angle of the worm gear. The positioning and limiting block includes a front positioning and limiting block and a rear positioning and limiting block located at opposite positions on the front and rear sides of the worm gear, respectively. The limiting arc strip includes a front positioning and limiting block. The device includes an arc strip and a rear limiting arc strip. The front limiting arc strip is located on the side of the front cover plate of the upper shell near the rear cover plate of the upper shell, and the rear limiting arc strip is located on the side of the rear cover plate of the upper shell near the front cover plate of the upper shell. The coupling is a flexible coupling. The electric clamping head module, which can achieve clamping at any position throughout the full stroke, also includes a third bearing and a fourth bearing. One end of the rotating shaft is rotatably connected to the rear cover plate of the upper shell via the third bearing, and the other end of the rotating shaft is rotatably connected to the front cover plate of the upper shell via the fourth bearing.

[0016] Preferably, the top of the rod mounting section has a recessed wrench hole; the outer contour of the upper shell is generally cuboid; each of the four outer sides of the upper shell has a coarse positioning structure and a fine positioning pin hole, the coarse positioning structure being a coarse positioning through groove or a coarse positioning step; one of the four outer sides of the upper shell also has a recessed label receiving groove; the bottom outer circumference of the upper shell is recessed to form a lower shell fitting step, the outer mounting hole being located on the lower shell fitting step; the lower shell fitting step also has screw holes.

[0017] Preferably, the second bearing is an angular contact ball bearing; there are two second bearings, and the two second bearings are installed back to back. The upper part of the inner ring of the upper second bearing abuts against the lower part of the bushing, the upper part of the outer ring of the upper second bearing abuts against the top of the bearing hole, the lower part of the inner ring of the lower second bearing abuts against the upper part of the locking nut, and the lower part of the outer ring of the lower second bearing abuts against the upper part of the limiting sleeve.

[0018] Preferably, the electric clamping head module capable of clamping at any position throughout the entire stroke further includes a detachable limiting pin at the bottom of the flange; the detachable limiting pin at the bottom of the flange is simultaneously inserted into the outer side mounting hole and the inner side mounting hole, and the detachable limiting pin at the bottom of the flange abuts against the bottom of the limiting sleeve.

[0019] (III) Beneficial Effects

[0020] Compared with existing technologies, the electric clamping head module of this utility model, which can achieve clamping at any position throughout its full stroke, abandons the existing screw-driven linkage structure and instead adopts a structure in which a self-locking worm gear transmission assembly with a self-locking function directly drives the rotation of the clamping arm assembly. It fully utilizes the advantages of worm gear transmission, enabling workpiece clamping at any position within the rotational stroke range of the clamping arm assembly. This makes it flexible, convenient, and widely applicable. Furthermore, the clamping force is maintained after the clamping arm assembly reaches its designated position (not a fixed dead-point clamping structure), ensuring that the clamping force is not affected by wear on bearings or other components, resulting in a constant clamping force and stable workpiece clamping at any position within the rotational stroke range of the clamping arm assembly. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic front sectional view of the present invention;

[0024] Figure 3 For along Figure 2 Enlarged view of the sectional view along line AA;

[0025] Figure 4 This is an exploded view of the present invention;

[0026] Figure 5 This is a schematic diagram of the integrated upper shell base, upper shell rear side plate, and rod top mounting platform structure in this utility model;

[0027] Figure 6 for Figure 5 A diagram from another direction;

[0028] Figure 7 This is a schematic diagram of the structure of the front cover plate of the upper shell in this utility model;

[0029] Figure 8 This is a schematic diagram of the structure of the present invention: using a detachable limiting pin at the bottom of the flange to fix the bottom of the limiting sleeve;

[0030] Figure 9 This is a schematic diagram of the positive and negative limit positions and the zero-degree clamping position of the clamping arm assembly in this utility model.

[0031] The attached figures are labeled as follows:

[0032] 1. Upper housing; 2. Self-locking worm gear transmission assembly; 3. Rotating shaft; 4. Coupling; 5. Clamping arm assembly; 6. First bearing; 7. Bushing; 8. Second bearing; 9. Locking nut; 10. Limiting sleeve; 11. Removable limiting pin at the bottom of the flange; 12. Vertical long screw; 13. Horizontal screw; 14. Horizontal locating pin; 15. Third bearing; 16. Fourth bearing;

[0033] 11. Upper shell base; 12. Rear side plate of upper shell; 13. Front side cover plate of upper shell; 14. Rod top mounting platform; 15. First mounting cavity; 16. Second mounting cavity; 17. Mating surface; 18. Precision locating pin hole; 19. Screw hole;

[0034] 21. Worm gear; 22. Worm;

[0035] 41. Power connection hole; 42. Lateral locking hole for coupling;

[0036] 51. Boom; 52. Pressure bar;

[0037] 81. Inner ring of the bearing; 82. Outer ring of the bearing;

[0038] 101. Inner side mounting hole;

[0039] 141. Worm gear mounting hole;

[0040] 111. Drive shaft insertion opening; 112. Outer side mounting hole; 113. Front mounting surface; 114. Left side mounting surface; 115. Rear mounting surface; 116. Right side mounting surface; 117. Front square coarse positioning slot; 118. Rear square coarse positioning slot; 119. Upper left coarse positioning step; 120. Lower left coarse positioning step; 121. Bearing mounting hole; 122. Sleeve mounting hole; 123. Vertical threaded connection hole; 124. Upper right coarse positioning step; 125. Lower right coarse positioning step; 126. Label receiving slot; 127. Lower housing fitting step; 128. Screw hole;

[0041] 0121. Horizontal threaded connection hole; 0122. Horizontal pin hole; 0123. Disc-shaped second mounting cavity; 0124. Worm gear mounting groove; 0125. Rear limit arc strip;

[0042] 211. Front positioning limit block; 212. Rear positioning limit block;

[0043] 221. Rod top mounting section; 222. Helical gear section; 223. Bushing mounting section; 224. Bearing mounting section; 225. External thread section; 226. Coupling mounting section; 227. Limiting step;

[0044] 521. Clamping end; 522. Clamping block mounting hole;

[0045] 131. Worm gear mounting front groove; 132. Disc-shaped second mounting front cavity; 133. Front limit arc strip;

[0046] 2211. Wrench hole. Detailed Implementation

[0047] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0048] The following is combined with Figure 1-9 The electric clamping head module of this utility model, which can achieve clamping at any position throughout the entire stroke, will be further described.

[0049] Please refer to this carefully. Figure 1-4 This utility model discloses an electric clamping device clamping head module capable of clamping at any position throughout its entire stroke, comprising: an upper housing 1, a self-locking worm gear transmission assembly 2, a rotating shaft 3, a coupling 4, and a clamping arm assembly 5; the upper housing 1 has a first mounting cavity 15 and a second mounting cavity 16 that are connected, the first mounting cavity 15 being rod-shaped and the second mounting cavity 16 being disc-shaped, the second mounting cavity 16 being located on the upper side of the first mounting cavity 15; the self-locking worm gear transmission assembly 2 includes a worm wheel 21 and a worm 22, the worm wheel 21 being located in the second mounting cavity 16; the worm 22 being located in the first mounting cavity 15, the upper part of the worm 22... The worm 22 meshes with the worm gear 21, and its lower part is connected to the upper part of the coupling 4. The lower part of the coupling 4 has a power connection hole 41. The coupling 4 is also located in the first mounting cavity 15, and the lower part of the first mounting cavity 15 has a power shaft insertion opening 111. The rotating shaft 3 is coaxially arranged with the worm gear 21 and is also fixedly connected to the worm gear 21. The end of the rotating shaft 3 extends out of the second mounting cavity 16. The clamping arm assembly 5 is located outside the upper housing 1, and one end of the clamping arm assembly 5 is fixed to the rotating shaft 3. The other end of the clamping arm assembly 5 is the clamping end 521. When the worm 22 rotates, it drives the worm gear 21 to rotate, which in turn drives the clamping arm assembly 5 to open or clamp through the rotating shaft 3.

[0050] The electric clamping device of this invention, which can achieve clamping at any position throughout its full stroke, forms a modular execution module. The lower part of the execution module has a reserved opening 111 for the power shaft to be installed, which can be connected to different power modules to form a clamping device with the required performance. The performance of the clamping device includes the opening and closing speed and clamping torque of the clamping arm assembly 5.

[0051] In this embodiment, the upper housing 1 provides installation space and a mounting base. The self-locking worm gear transmission assembly 2 transmits the rotational power of the power module to the clamping arm assembly 5 via the rotating shaft 3, and converts it into the opening and closing power of the clamping arm assembly 5. The coupling 4 enables a quick connection between the worm gear 22 and the power output shaft in the power module. The clamping arm assembly 5 clamps the workpiece to be clamped.

[0052] This utility model discloses an electric clamping device chuck module capable of clamping at any position throughout its entire stroke. It abandons the existing screw-driven linkage structure and instead employs a self-locking worm gear transmission assembly 2 with a self-locking function to directly drive the clamping arm assembly 5 to rotate. This fully utilizes the advantages of worm gear transmission, allowing workpiece clamping at any position within the rotational stroke range of the clamping arm assembly 5. This electric clamping device chuck module can rotate to any position within its stroke range to clamp the workpiece, offering flexibility, convenience, and wide applicability. Furthermore, the clamping structure is based on the clamping arm assembly 5 reaching its designated position (not a fixed dead-point clamping structure), ensuring a constant clamping force unaffected by wear on bearings or other components, guaranteeing stable clamping.

[0053] Figure 9 The three position states of the clamping arm assembly 5 are shown, where: the zero-degree clamping position is the horizontal clamping state of the clamping arm assembly; the lowest limit clamping state is the state of rotating counterclockwise by an angle P from the zero-degree clamping position; and the highest limit clamping state is the state of rotating clockwise by an angle K from the zero-degree clamping position. -P to K is the rotation stroke range of the clamping arm assembly 5.

[0054] It should be noted that the condition for the worm gear assembly to have a self-locking function is existing technology, and the fact that this utility model does not describe it in detail does not affect the full disclosure of this utility model.

[0055] According to a specific embodiment of this utility model, the worm gear 22 includes, from top to bottom, the following components arranged sequentially: a rod top mounting section 221, a helical tooth section 222, a bushing mounting section 223, a bearing mounting section 224, an external thread section 225, and a coupling mounting section 226; the junction of the helical tooth section 222 and the bushing mounting section 223 has a limiting step 227; the electric clamping head module capable of clamping at any position throughout the entire stroke further includes: a first bearing 6, a bushing 7, a second bearing 8, a locking nut 9, and a limiting sleeve 10; A bearing 6 is fitted outside the rod top mounting section 221, and a second bearing 8 is fitted outside the bearing mounting section 224. The worm gear 22 is rotatably connected to the upper housing 1 via the first bearing 6 and the second bearing 8. The second bearing 8 includes an inner bearing ring 81 and an outer bearing ring 82. A bushing 7 is fitted on the bushing mounting section 223, and the upper part of the inner bearing ring 81 abuts against the limiting step 227. A locking nut 9 is located on the helical tooth section 222, and the locking nut 9 abuts against the lower part of the inner bearing ring 81. The top of the limiting sleeve 10 abuts against the lower part of the outer bearing ring 82.

[0056] In this embodiment, a specific mounting structure for the worm gear 22 is provided, which ensures smooth and stable rotation of the worm gear 22. Specifically, the top section (rod top mounting section 221) of the worm gear 22 is rotatably connected to the top wall of the upper housing 1 via the first bearing 6, and the middle section (rod top mounting section 221) of the worm gear 22 is rotatably connected to the inner wall of the upper housing 1 via the second bearing 8. This structure, with rotatable connections at both the top and bottom, improves the stability of the worm gear 22's rotation. The bushing 7 and the locking nut 9 cooperate to axially limit the second bearing 8. After the electric clamping head module of this invention, which can achieve clamping at any position throughout the entire stroke, is connected to the power module, the lower end of the limiting sleeve 10 is abutted and limited, thus restricting the downward movement freedom of the second bearing 8 and ensuring that the second bearing 8 and the limiting sleeve 10 are located in a preset position within the first mounting cavity 15 after assembly.

[0057] More specifically, the bottom side of the upper housing 1 is provided with an outer mounting hole 112 that connects to the first mounting cavity 15; the lower part of the limiting sleeve 10 is provided with an inner mounting hole 101 directly opposite the outer mounting hole 112; the coupling mounting section 226 is inserted into the coupling 4 and connected to the coupling 4; the lower outer side of the coupling 4 is also provided with a coupling side locking hole 42 that connects to the power connection hole 41, and the coupling side locking hole 42 is at the same height as the inner mounting hole 101.

[0058] In this embodiment, the coupling side locking hole 42, the outer side mounting hole 112, and the inner side mounting hole 101 are located at the same height. Rotating the coupling 4 allows the coupling side locking hole 42 to be directly aligned with the inner side mounting hole 101. The outer side mounting hole 112 and the inner side mounting hole 101 are used as tool insertion holes during installation. For example, when the electric clamping head module of this utility model, which can achieve clamping at any position throughout the entire stroke, is connected to the power output shaft in the power module, the set screw of the coupling 4 is screwed into the coupling side locking hole 42 through the outer side mounting hole 112 and the inner side mounting hole 101 in sequence with a screwdriver, and the set screw abuts against the outer wall of the power output shaft, thereby improving the stability of the connection between the coupling 4 and the power output shaft.

[0059] Please refer to this carefully. Figure 5-7According to a specific embodiment of this utility model, the upper shell 1 includes: an upper shell base 11, an upper shell rear side plate 12, and an upper shell front side cover plate 13; the upper shell base 11 and the upper shell rear side plate 12 are integral structures; the upper shell front side cover plate 13 and the upper shell rear side plate 12 are detachably connected; the upper shell rear side plate 12 is located above the upper shell base 11; the upper shell rear side plate 12 is provided with a recessed worm gear mounting rear groove 0124 that is semi-cylindrical in shape; the upper shell front side cover plate 13 is also provided with a recessed worm gear mounting front groove 131 that is semi-cylindrical in shape at the position opposite to the worm gear mounting rear groove 0124; the upper shell base 11 is also provided with a bearing mounting hole 121 and a sleeve mounting hole 122; the second bearing 8 is mounted in the bearing mounting hole 121. Inside, the limiting sleeve 10 is installed in the sleeve mounting hole 122, and the outer mounting hole 112 is located on the bottom side of the upper shell seat 11, and the outer mounting hole 112 communicates with the sleeve mounting hole 122; the upper shell rear side plate 12 is also provided with a recessed disc-shaped second mounting rear cavity 0123; the upper shell front side cover plate 13 is provided with a recessed disc-shaped second mounting front cavity 132; the upper shell front side cover plate 13 is fastened to the upper shell rear side plate 12, and the worm gear mounting rear groove 0124, the worm gear mounting front groove 131, the bearing mounting hole 121 and the sleeve mounting hole 122 together form the first mounting cavity 15; the disc-shaped second mounting rear cavity 0123 and the disc-shaped second mounting front cavity 132 together form the second mounting cavity 16.

[0060] In this embodiment, the structure of the upper shell 1 is specifically designed. The upper shell 1 is designed as a split structure, and the external shape of each split structure and the shape of its internal mounting holes / cavities are rationally set. This ensures the overall strength of the upper shell 1 while meeting the requirements for the insertion and stable installation of internal components. Specifically, the upper shell base 11 and the upper shell rear side plate 12 are an integral structure, facilitating the overall strength of the upper shell 1. The detachable connection between the upper shell front cover plate 13 and the upper shell rear side plate 12 facilitates the insertion of components such as the worm gear 21 and the worm 22. During assembly, the worm 22 is inserted into the first mounting cavity 15 from bottom to top. The upper shell base 11 is provided with bearing mounting holes 121 and sleeve mounting holes 122 for corresponding installation of the second bearing 8 and the limiting sleeve 10. First, the worm gear 21 is inserted into the disc-shaped second mounting cavity 0123 to ensure smooth meshing between the worm gear 21 and the worm 22. Then, the upper shell front cover plate 13 is fastened to complete the installation of the worm gear and worm.

[0061] According to a specific embodiment of this utility model, the mating surface 17 between the upper shell seat 11 and the front cover plate 13 of the upper shell is stepped; a protruding rod top mounting platform 14 is provided on one side of the top of the rear side plate 12 of the upper shell, and the rod top mounting platform 14 and the rear side plate 12 of the upper shell are an integral structure; a worm gear mounting hole 141 is provided in the rod top mounting platform 14, the first bearing 6 is installed in the worm gear mounting hole 141, the top of the worm 22 extends into the worm gear mounting hole 141, and the top of the worm 22 is rotatably connected to the rod top mounting platform 14 via the first bearing 6.

[0062] In this embodiment, the mating surface 17 between the upper housing seat 11 and the front cover plate 13 of the upper housing is stepped, which facilitates mutual interlocking and improves the stability of the assembly. Furthermore, the stepped mating surface 17 avoids long straight seam structures, further improving the overall mechanical properties of the upper housing 1. In this embodiment, the rod top mounting platform 14 and the rear side plate 12 of the upper housing are an integral structure; that is, the upper housing seat 11, the rear side plate 12 of the upper housing, and the rod top mounting platform 14 are all integrated. This structure ensures that the worm gear mounting hole 141 is a complete hole, further improving the installation accuracy and stability of the worm gear 22.

[0063] According to a specific embodiment of this utility model, the electric clamping device clamping head module capable of clamping at any position throughout the entire stroke further includes: a vertical long screw 012, a horizontal screw 013, and a horizontal positioning pin 014; the upper housing 11 is also provided with a vertical threaded connection hole 123 extending through it in the vertical direction, one end of the vertical long screw 012 is located in the vertical threaded connection hole 123, and the other end of the vertical long screw 012 extends into the front cover plate 13 of the upper housing; the rear side plate 12 of the upper housing is provided with a horizontal threaded connection hole 0121 and a horizontal pin hole 0122 extending through it in the front and rear directions, one end of the horizontal screw 013 passes through the rear side plate 12 of the upper housing, and the other end of the horizontal screw 013 extends into the front cover plate 13 of the upper housing, one end of the horizontal positioning pin 014 passes through the rear side plate 12 of the upper housing, and the other end of the horizontal positioning pin 014 extends into the front cover plate 13 of the upper housing.

[0064] In this embodiment, the connection structure of the upper shell 1 after separation is specifically designed.

[0065] The transverse positioning pin 014 is used for precise positioning between the rear side plate 12 of the upper shell and the front side cover plate 13 of the upper shell. Since the front and rear parts of the worm gear 21 are positioned by the rear side plate 12 of the upper shell and the front side cover plate 13 of the upper shell respectively, the fastening accuracy of the rear side plate 12 of the upper shell and the front side cover plate 13 of the upper shell is high, which can ensure the installation accuracy of the worm gear 21.

[0066] The vertical long screw 012 and the horizontal screw 013 achieve locking from both the horizontal and vertical directions, ensuring the stability of the upper housing 1 connection.

[0067] During assembly, before fastening the rear side plate 12 and the front side cover 13 of the upper shell, first install the transverse positioning pin 014, then install the transverse screw 013, and then install the vertical long screw 012 to achieve the installation of the vertical long screw 012 and the transverse screw 013.

[0068] According to a specific embodiment of the present invention, the clamping arm assembly 5 includes a fixedly connected arm 51 and a pressure rod 52. The end of the arm 51 away from the pressure rod 52 is fixedly connected to the rotating shaft 3. The end of the pressure rod 52 away from the arm 51 is a clamping end 521, and a clamping block mounting hole 522 is provided on the clamping end 521.

[0069] In this embodiment, the pressure block mounting hole 522 is used to install pressure blocks of different shapes to match workpieces of different shapes.

[0070] More specifically, there are two booms 51, and the two booms 51 are respectively fixed to both ends of the pivot 3; or there are two booms 51, and the two booms 51 are respectively fixed to both ends of the pivot 3.

[0071] In this embodiment, two structures of clamping arm assembly 5 are provided. Compared with each other, the structure with two arms 51 is more stable and suitable for occasions with large clamping force and high precision requirements; the structure with one arm 51 is simpler and suitable for occasions with small clamping force and low cost requirements.

[0072] According to a specific embodiment of this utility model, the worm gear 21 is provided with a protruding positioning and limiting block, and the second mounting cavity 16 is provided with a protruding limiting arc strip. The trajectory formed by the positioning and limiting block as the worm gear 21 rotates is the positioning and limiting block trajectory, which is arc-shaped. The limiting arc strip is set along the positioning and limiting block trajectory. The limiting arc strip works in conjunction with the positioning and limiting block to limit the rotation angle of the worm gear 21. The positioning and limiting block includes a front positioning and limiting block 211 and a rear positioning and limiting block 212 located at opposite positions on the front and rear sides of the worm gear 21, respectively. The limiting arc strip includes a front limiting arc strip 133 (please refer to the following for details). Figure 7 The front limiting arc 133 is located on the side of the front cover plate 13 of the upper shell near the rear cover plate 12 of the upper shell, and the rear limiting arc 0125 is located on the side of the rear cover plate 12 of the upper shell near the front cover plate 13 of the upper shell.

[0073] In this embodiment, the positioning limit block on the worm gear 21 has the following two functions.

[0074] Function 1: The positioning limit block is used for positioning. When the electric clamping head module of this utility model, which can achieve clamping at any position throughout the entire stroke, is used in conjunction with the encoder, the positioning limit block can serve as the reset point of the encoder, so that the encoder can accurately measure the rotation signal of the worm gear 21 each time it is used again after a power failure.

[0075] Function 2: The positioning limit block is used for mechanical limiting. When the positioning limit block rotates to contact the two ends of the limiting arc strip, the limiting arc strip restricts the worm gear 21 from continuing to rotate, thereby limiting the rotation angle of the clamping arm assembly 5. This ensures that even in the event of an electrical failure, the clamping arm assembly 5 will rotate within the preset rotation range, preventing the clamping arm assembly 5 from over-travel and colliding with the upper housing 1.

[0076] According to a specific embodiment of this utility model, the coupling 4 is an elastic coupling; the electric clamping head module that can achieve clamping at any position throughout the entire stroke also includes a third bearing 015 and a fourth bearing 016. One end of the rotating shaft 3 is rotatably connected to the rear side plate 12 of the upper shell via the third bearing 015, and the other end of the rotating shaft 3 is rotatably connected to the front side cover plate 13 of the upper shell via the fourth bearing 016.

[0077] The flexible connector is used to absorb vibration and compensate for assembly and machining errors. The third bearing 015 and the fourth bearing 016 are used to ensure the smooth rotation of the shaft 3.

[0078] According to a specific embodiment of the present invention, the top of the rod top mounting section 221 is provided with a recessed wrench hole 2211.

[0079] Because the worm gear of this utility model has a self-locking function, when a power failure occurs, the worm 22 can be manually rotated by inserting a wrench into the wrench hole 2211, thereby controlling the rotation of the clamping arm assembly 5 and realizing the manual unlocking function.

[0080] More specifically, the outer contour of the upper housing 11 is generally cuboid; each of the four outer sides of the upper housing 11 is provided with a coarse positioning structure, a fine positioning pin hole 18, and a screw hole 19, and the coarse positioning structure is a coarse positioning through groove or a coarse positioning step; one of the four outer sides of the upper housing 11 is also provided with a recessed label receiving groove 126; the bottom outer circumference of the upper housing 11 is recessed to form a lower housing assembly step 127, and the outer mounting hole 112 is provided on the lower housing assembly step 127; the lower housing assembly step 127 is also provided with a screw hole 128.

[0081] More specifically, the four outer surfaces of the upper housing 11 are a front mounting surface 113, a left mounting surface 114, a rear mounting surface 115, and a right mounting surface 116. The front mounting surface 113 and the rear mounting surface 115 are arranged opposite to each other, and the left mounting surface 114 and the right mounting surface 116 are arranged opposite to each other. The front mounting surface 113 has a recessed front square coarse positioning through groove 117 in the middle. The rear mounting surface 115 has a recessed rear square coarse positioning through groove 118 in the middle. The upper part of the left mounting surface 114 has a raised upper left coarse positioning step 119, which is formed by cutting the bottom of the front cover plate 13 and the rear plate 12 of the upper housing flat. The lower part of the left mounting surface 114 has a raised lower left coarse positioning step 120. The upper part of the right mounting surface 116 has a raised upper right coarse positioning step 124, and the lower part of the right mounting surface 116 has a raised lower right coarse positioning step 125.

[0082] In this embodiment, the electric clamping head module of this invention, capable of clamping at any position throughout its full stroke, can be installed on a material handling robot as its end effector. The clamping arm assembly 5 acts as a movable clamping block, working in conjunction with the fixed clamping block to clamp the workpiece. After clamping, it self-locks, facilitating the smooth transfer of the workpiece to the required workstation by the material handling robot. The label receiving slot 126 is used for labeling.

[0083] During installation, the left mounting surface 114 of this invention is the main mounting surface. Since a front mounting surface 113, a rear mounting surface 115, and a right mounting surface 116 are also provided, installation on all four surfaces is possible, offering greater flexibility. In each mounting surface, a coarse positioning structure is used for coarse positioning to facilitate quick assembly, a fine positioning pin hole 18 is used for fine positioning to ensure installation accuracy, and a screw hole 19 is used to install threaded connectors, enabling detachable connection.

[0084] The positioning groove is located in the middle of the mounting surface, and the coarse positioning step is located in the upper and lower parts of the mounting surface. In adjacent surfaces, the positioning groove and the coarse positioning step are arranged alternately, which can reduce the weakening of the strength of the upper shell 11 by the positioning structure.

[0085] More specifically, the bottom outer circumference of the upper housing 11 is recessed to form a lower housing assembly step 127, and an outer mounting hole 112 is provided on the lower housing assembly step 127; a screw hole 128 is also provided on the lower housing assembly step 127.

[0086] In this embodiment, the lower shell mounting step 127 and screw hole 128 are reserved for quick connection with the power module. When the rotational power for driving the worm gear 22 is connected, the outer shell of the power module is fitted into the lower shell mounting step 127 and locked with screws. This structure enables quick docking of the electric clamping head module of this invention, which can clamp at any position throughout its full stroke, with the power module, while ensuring that the upper and lower shells are flush.

[0087] According to a specific embodiment of this utility model, the second bearing 8 is an angular contact ball bearing; there are two second bearings 8, and the two second bearings 8 are installed back to back. The upper part of the inner ring of the upper second bearing 8 abuts against the lower part of the bushing 7, the upper part of the outer ring of the upper second bearing 8 abuts against the top of the bearing hole, the lower part of the inner ring of the lower second bearing 8 abuts against the upper part of the locking nut 9, and the lower part of the outer ring of the lower second bearing 8 abuts against the upper part of the limiting sleeve 10.

[0088] In this embodiment, two angular contact bearings are mounted back-to-back to provide axial thrust. A limiting sleeve 10 is used for radial positioning of the second bearing 8.

[0089] Please refer to this carefully. Figure 8According to a specific embodiment of the present invention, the electric clamping device clamping head module that can achieve clamping at any position throughout the entire stroke also includes a detachable limiting pin 011 at the bottom of the flange; the detachable limiting pin 011 at the bottom of the flange is simultaneously inserted into the outer side mounting hole 112 and the inner side mounting hole 101, and the detachable limiting pin 011 at the bottom of the flange abuts against the bottom of the limiting sleeve 10.

[0090] In this embodiment, the detachable limiting pin 011 at the bottom of the flange serves as a temporary positioning device. The outer mounting hole 112 and the inner mounting hole 101 serve as insertion holes for the positioning pin. After the assembly of this utility model is completed, the detachable limiting pin 011 at the bottom of the flange is inserted into the outer mounting hole 112 and the inner mounting hole 101, and abuts against the bottom of the limiting sleeve 10. The limiting sleeve 10 will not fall down, forming a stable modular structure. This facilitates the overall transportation and storage of this utility model.

[0091] When this utility model needs to be connected to the power module, the detachable limiting pin 011 at the bottom of the flange is removed. The power output shaft of the power module is then inserted into the power connection hole 41. The outer mounting hole 112 and the inner mounting hole 101 are used as tool insertion holes. A set screw is screwed into the coupling side locking hole 42 and abuts against the outer wall of the power output shaft using a screwdriver. After the electric clamping head module of this utility model, which can achieve clamping at any position throughout the full stroke, is connected to the power module, the lower end of the limiting sleeve 10 is abutted by the components in the power module, restricting the downward movement freedom of the second bearing 8.

[0092] It should be noted that in this utility model, the "front", "rear", "up" and "down" orientation references Figure 1 The indicated directions.

[0093] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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; they can refer to the internal connection of two components; and they can also refer to a "transmission connection," that is, a power connection through various suitable methods such as belt drive, gear drive, or sprocket drive. 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. An electric clamping device clamping head module capable of clamping at any position throughout its full stroke, characterized in that, include: The system comprises an upper housing, a self-locking worm gear drive assembly, a rotating shaft, a coupling, and a clamping arm assembly. The upper housing has a first mounting cavity and a second mounting cavity that communicate with each other. The first mounting cavity is rod-shaped, and the second mounting cavity is disc-shaped, located on the upper side of the first mounting cavity. The self-locking worm gear drive assembly includes a worm wheel and a worm. The worm wheel is located in the second mounting cavity. The worm is located in the first mounting cavity, with its upper part meshing with the worm wheel and its lower part connected to the upper part of the coupling. The lower part of the shaft has a power connection hole; the coupling is also located in the first mounting cavity, and the lower part of the first mounting cavity has a power shaft insertion opening; the rotating shaft is coaxially arranged with the worm gear, and the rotating shaft is also fixedly connected to the worm gear. The end of the rotating shaft extends out of the second mounting cavity. The clamping arm assembly is located outside the upper housing, and one end of the clamping arm assembly is fixed to the rotating shaft, and the other end of the clamping arm assembly is a clamping end; the worm rotates, driving the worm gear to rotate, and the rotating shaft drives the clamping arm assembly to open or clamp.

2. The electric clamping device clamping head module capable of clamping at any position throughout its full stroke, as described in claim 1, is characterized in that... The worm gear includes, from top to bottom, a rod top mounting section, a helical tooth section, a bushing mounting section, a bearing mounting section, an external thread section, and a coupling mounting section; the joint between the helical tooth section and the bushing mounting section has a limiting step; the electric clamping head module capable of clamping at any position throughout the full stroke further includes: a first bearing, a bushing, a second bearing, a locking nut, and a limiting sleeve; the first bearing is sleeved outside the rod top mounting section, the second bearing is sleeved outside the bearing mounting section, and the worm gear is rotatably connected to the upper housing via the first bearing and the second bearing respectively; the second bearing includes an inner bearing ring and an outer bearing ring; the bushing is sleeved outside the coupling mounting section. The bushing mounting section has the upper part of the bearing inner ring abutting against the limiting step; the locking nut is located on the helical tooth section and abuts against the lower part of the bearing inner ring; the top of the limiting sleeve abuts against the lower part of the bearing outer ring; one side of the bottom of the upper housing has an outer mounting hole communicating with the first mounting cavity; the lower part of the limiting sleeve has an inner mounting hole opposite to the outer mounting hole; the coupling mounting section is inserted into the coupling and connected to the coupling; the lower outer part of the coupling also has a coupling side locking hole communicating with the power connection hole, and the coupling side locking hole is at the same height as the inner mounting hole.

3. The electric clamping device clamping head module capable of clamping at any position throughout its full stroke, as described in claim 2, is characterized in that... The upper housing includes: an upper housing base, an upper housing rear side plate, and an upper housing front side cover plate; the upper housing base and the upper housing rear side plate are an integral structure; the upper housing front side cover plate and the upper housing rear side plate are detachably connected; the upper housing rear side plate is located on the upper part of the upper housing base; the upper housing rear side plate is provided with a recessed worm gear mounting rear groove that is generally semi-cylindrical; the upper housing front side cover plate is also provided with a recessed worm gear mounting front groove that is generally semi-cylindrical, located opposite the worm gear mounting rear groove; the upper housing base is also provided with a bearing mounting hole and a sleeve mounting hole; the second bearing is installed in the bearing mounting hole; the limit... The sleeve is installed in the sleeve mounting hole, the outer mounting hole is located on the bottom side of the upper shell seat, and the outer mounting hole communicates with the sleeve mounting hole; the rear side plate of the upper shell is also provided with a recessed disc-shaped second mounting cavity; the front side cover plate of the upper shell is provided with a recessed disc-shaped second mounting cavity; the front side cover plate of the upper shell is fastened to the rear side plate of the upper shell, and the worm gear mounting groove, the worm gear mounting groove, the bearing mounting hole and the sleeve mounting hole together form the first mounting cavity; the disc-shaped second mounting cavity and the disc-shaped second mounting cavity together form the second mounting cavity.

4. The electric clamping device clamping head module capable of clamping at any position throughout its full stroke, as described in claim 3, is characterized in that... The mating surface between the upper shell seat and the front cover plate of the upper shell is stepped; a protruding rod top mounting platform is provided on one side of the top of the rear side plate of the upper shell, and the rod top mounting platform and the rear side plate of the upper shell are integral structures; a worm gear mounting hole is provided through the rod top mounting platform, the first bearing is installed in the worm gear mounting hole, the top of the worm gear extends into the worm gear mounting hole, and the top of the worm gear is rotatably connected to the rod top mounting platform via the first bearing.

5. The electric clamping device clamping head module capable of clamping at any position throughout its full stroke, as described in claim 4, is characterized in that... The electric clamping head module capable of clamping at any position throughout its full stroke further includes: a vertical long screw, a horizontal screw, and a horizontal positioning pin; the upper housing is also provided with a vertical threaded connection hole extending through it in the vertical direction, one end of the vertical long screw is located in the vertical threaded connection hole, and the other end of the vertical long screw extends into the front cover plate of the upper housing; the rear side plate of the upper housing is provided with a horizontal threaded connection hole and a horizontal pin hole extending through it in the front-rear direction, one end of the horizontal screw passes through the rear side plate of the upper housing, and the other end of the horizontal screw extends into the front cover plate of the upper housing, one end of the horizontal positioning pin passes through the rear side plate of the upper housing, and the other end of the horizontal positioning pin extends into the front cover plate of the upper housing.

6. The electric clamping device clamping head module capable of clamping at any position throughout its full stroke, as described in claim 5, is characterized in that... The clamping arm assembly includes a fixedly connected arm and a pressure rod. The end of the arm away from the pressure rod is fixedly connected to the rotating shaft. The end of the pressure rod away from the arm is the clamping end, and the clamping end is provided with a pressure block mounting hole. The number of arms is two, and the two arms are respectively fixed to both ends of the rotating shaft; or the number of arms is two, and the two arms are respectively fixed to both ends of the rotating shaft.

7. The electric clamping device clamping head module capable of clamping at any position throughout its full stroke, as described in claim 6, is characterized in that... The worm gear is provided with a protruding positioning and limiting block, and the second mounting cavity is provided with a protruding limiting arc strip. The trajectory formed by the positioning and limiting block as the worm gear rotates is the positioning block trajectory, which is an arc shape. The limiting arc strip is set along the positioning block trajectory and works in conjunction with the positioning and limiting block to limit the rotation angle of the worm gear. The positioning and limiting block includes a front positioning and limiting block and a rear positioning and limiting block located at opposite positions on the front and rear sides of the worm gear, respectively. The limiting arc strip includes a front limiting arc strip. The front limiting arc strip is located on the side of the front cover plate of the upper shell near the rear cover plate of the upper shell, and the rear limiting arc strip is located on the side of the rear cover plate of the upper shell near the front cover plate of the upper shell; the coupling is an elastic coupling; the electric clamping head module that can achieve clamping at any position throughout the full stroke also includes a third bearing and a fourth bearing, one end of the rotating shaft is rotatably connected to the rear cover plate of the upper shell via the third bearing, and the other end of the rotating shaft is rotatably connected to the front cover plate of the upper shell via the fourth bearing.

8. The electric clamping device clamping head module capable of clamping at any position throughout its full stroke, as described in claim 7, is characterized in that... The top of the rod mounting section has a recessed wrench hole; the outer contour of the upper shell is generally cuboid; each of the four outer sides of the upper shell has a coarse positioning structure and a fine positioning pin hole, the coarse positioning structure being a coarse positioning through groove or a coarse positioning step; one of the four outer sides of the upper shell also has a recessed label receiving groove; the bottom outer circumference of the upper shell is recessed to form a lower shell fitting step, the outer mounting hole being located on the lower shell fitting step; the lower shell fitting step also has screw holes.

9. The electric clamping device clamping head module capable of clamping at any position throughout its full stroke, as described in claim 8, is characterized in that... The second bearing is an angular contact ball bearing; there are two second bearings, and the two second bearings are installed back to back. The upper part of the inner ring of the upper second bearing abuts against the lower part of the bushing, and the upper part of the outer ring of the upper second bearing abuts against the top of the bearing hole. The lower part of the inner ring of the lower second bearing abuts against the upper part of the locking nut, and the lower part of the outer ring of the lower second bearing abuts against the upper part of the limiting sleeve.

10. The electric clamping device clamping head module capable of clamping at any position throughout its full stroke, as described in any one of claims 2-9, is characterized in that... The electric clamping device pressure chuck module, which can achieve clamping at any position throughout the entire stroke, also includes a detachable limiting pin at the bottom of the flange; the detachable limiting pin at the bottom of the flange is simultaneously inserted into the outer side mounting hole and the inner side mounting hole, and the detachable limiting pin at the bottom of the flange abuts against the bottom of the limiting sleeve.

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