Compact type high-precision large-stroke multi-point centering electric clamping jaw

Abstract

The utility model discloses a compact type high-precision large-stroke multi-point centering electric clamping jaw which comprises a shell, a containing inner cavity is formed in the shell, n horizontal sliding grooves communicated with the containing inner cavity respectively are formed in the upper portion of the shell, n is a natural number larger than or equal to 2, an opening and closing clamping jaw is connected into each horizontal sliding groove in a sliding mode, and the opening and closing clamping jaw is connected with the containing inner cavity in a sliding mode. The clamping jaw opening and closing driving unit is arranged in the containing inner cavity and comprises a middle pushing sliding block, a lead screw body and a rotating power source. The lower portion of the opening and closing clamping jaw is provided with a stroke guide groove and a stroke limiting rod. Tooth-shaped guide grooves are formed in the two side walls of the horizontal sliding groove, tooth-shaped guide columns are arranged on the outer side walls of the opening and closing clamping jaws respectively, the tooth-shaped guide columns extend into the tooth-shaped guide grooves, and gaps are formed between the bottoms of the opening and closing clamping jaws and the bottom of the horizontal sliding groove. Compared with the prior art, the utility model has the advantages of compact integral structure, small volume, large stroke, high sliding precision of the opening and closing clamping jaw and good sliding smoothness.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electric jaw mechanical hand technical field especially relates to a compact high accuracy big stroke multi specified heart electric jaw. BACKGROUND

[0002] Three jaw electric jaw is mainly applied to material grabbing, carrying, assembly and other operations on industrial production line, and is a commonly used execution component in robots and automation equipment.

[0003] In the prior art, a servo electric jaw suitable for small precision part carrying is disclosed in Chinese patent publication No. CN214724337U, which comprises a mounting seat, a speed reducer housing is arranged on the right side of the mounting seat, a motor housing is arranged on the right side of the speed reducer housing, a connecting line is arranged on the upper side of the motor housing, an upper jaw is movably mounted on the left side of the mounting seat, a lower jaw is arranged on the lower side of the upper jaw, a micro motor is arranged on the inner side of the motor housing, a first gear is arranged on the outer side of the micro motor, a first screw rod is arranged on the output shaft of the micro motor, a second gear is arranged on the lower side of the first gear, and a second screw rod is arranged on the inner side of the second gear. The deficiency of the prior art lies in that in the electric jaw, the gear and rack meshing mode is adopted, the gear can only drive the synchronous movement of the racks on both sides, each rack is connected with a jaw, forming a two-jaw centering clamping structure, and a three-jaw or more multi-jaw centering clamping structure cannot be formed.

[0004] Therefore, it is necessary to provide a new compact high accuracy big stroke multi specified heart electric jaw to solve the above technical problems. SUMMARY

[0005] (I) Technical problems to be solved

[0006] Therefore, the utility model provides a compact high accuracy big stroke multi specified heart electric jaw, which aims at solving the technical problem that the existing electric jaw can only drive two jaws to open and close and cannot form a three-jaw or more multi-jaw centering clamping structure.

[0007] (II) Technical scheme

[0008] In order to solve the above technical problems, the utility model provides a compact high accuracy big stroke multi designation electrically operated clamping jaw, including the casing, be equipped with the accommodation inner chamber in the casing, the upper portion of casing is equipped with n respectively with the horizontal slide groove of accommodation inner chamber intercommunication, n is the natural number of >=2, n horizontal slide groove surrounds the same axis arrangement, each horizontal slide groove is slidably connected with one open and close clamping jaw, the compact high accuracy big stroke multi designation electrically operated clamping jaw still includes the clamping jaw opening and closing drive unit in the accommodation inner chamber, the clamping jaw opening and closing drive unit includes: the middle push slider, the screw main part and the rotary power, the middle push slider includes: the middle push cylinder and the n inclined surface slider of the middle push cylinder top, each open and close clamping jaw is equipped with the inclined surface guide groove with the shape of inclined surface slider is matched with the side close to the middle push slider, each inclined surface guide groove is slidably connected with one inclined surface slider, the middle push cylinder is connected with the screw main part screw, the lower portion of each open and close clamping jaw is equipped with the recessed stroke guide groove, the groove bottom of each horizontal slide groove is equipped with one limit screw mounting hole, each limit screw mounting hole is equipped with one stroke limit rod, the lower end of stroke limit rod is fixed in limit screw mounting hole, the upper end of stroke limit rod is inserted into stroke guide groove, the both sides wall of horizontal slide groove is equipped with one recessed gear guide groove respectively, the outside wall of open and close clamping jaw is equipped with the protruding gear guide column respectively, the shape of gear guide column is matched with gear guide groove, gear guide column is inserted into gear guide groove, and the bottom of open and close clamping jaw and the bottom of horizontal slide groove have a gap.

[0009] Preferably, each of the gear guide grooves includes m gear slot units, m is a natural number greater than or equal to 2; and m gear slot units are sequentially arranged along the height direction of the gear guide groove; the cross section of the gear slot unit is trapezoidal, and the slot opening width of the gear slot unit is greater than the slot bottom width.

[0010] Preferably, the shell comprises a chute frame and a gear box detachably connected in up and down directions; the chute frame comprises a chute main body and a chute connecting part fixedly connected in up and down directions; the chute connecting part is in a cylindrical shape, n=3, the chute main body comprises a center body in an equilateral triangle shape, the chute main body further comprises three edge groove bodies fixedly connected around three outer sides of the center body respectively, outer end portions of the edge groove bodies protrude from an outer side wall of the chute connecting part, the edge groove bodies are in a rectangular shape as a whole; one horizontal chute is arranged on each of the edge groove bodies, the horizontal chute is recessed from a top surface of the edge groove body; the receiving inner cavity comprises an upper receiving groove, a lower part of the upper receiving groove penetrates through the chute connecting part, an upper part of the upper receiving groove penetrates through the center body and communicates with each horizontal chute; a bottom part of the upper receiving groove is provided with a protruding middle pushing guide column, the middle pushing guide column is provided with a middle pushing guide hole penetrating therethrough, a lower part of the middle pushing cylinder is arranged in the middle pushing guide hole and is slidably connected with the middle pushing guide hole; the gear box is in a cylindrical shape with the same outer diameter as the chute connecting part; the receiving inner cavity further comprises a lower receiving groove arranged at a top part of the gear box, a bottom part of the lower receiving groove is provided with a protruding lead screw positioning column, the lead screw positioning column is provided with a lead screw positioning hole penetrating therethrough, the receiving inner cavity further comprises a wheel train receiving groove arranged at a bottom part of the gear box, and the wheel train receiving groove communicates with the lower receiving groove and the lead screw positioning hole respectively, the lower part of the middle pushing cylinder is provided with an inner transmission thread, an upper part of the lead screw main body extends into the middle pushing cylinder, and a top part of the lead screw main body is threadedly connected with the inner transmission thread; a lower part of the lead screw main body penetrates through the lead screw positioning hole and is rotatably connected with the lead screw positioning hole.

[0011] Preferably, the chute frame, the gear box, the middle pushing cylinder and the lead screw main body share a common central axis.

[0012] Preferably, one connecting corner block is further fixedly connected between two adjacent edge groove bodies, a lower part of the connecting corner block is fixed with an upper part of the center body, an upper part of the connecting corner block is lower than an upper part of the edge groove body, and the chute connecting part, the center body, the edge groove body and the connecting corner block are in an integrated structure; the compact high-precision large-stroke multi-specification electric clamping jaw further comprises an up and down shell connecting bolt penetrating through the connecting corner block and extending into the gear box.

[0013] Preferably, the jaw opening and closing drive unit further comprises a wheel train body and a motor, the lower part of the motor is arranged in the lower accommodation groove, the upper part of the motor is arranged in the upper accommodation groove, the wheel train body is installed in the wheel train accommodation groove, the lower part of the screw rod body is connected with one side of the wheel train body, the other side of the wheel train body is connected with the lower part of the motor, and the motor is vertically arranged on one side of the screw rod body; the wheel train body can transmit the rotating power of the motor to the screw rod body and drive the middle push sliding block to lift to push n opening and closing jaws to synchronously stretch and shrink along the corresponding horizontal sliding groove; the input rotating speed of the wheel train body is greater than the output rotating speed of the wheel train body.

[0014] Preferably, the upper and lower ends of the screw rod positioning hole are both provided with recessed upper and lower limiting grooves; the jaw opening and closing drive unit further comprises upper and lower bearings arranged around the screw rod body respectively, and the upper bearing is installed in the upper limiting groove and the lower bearing is installed in the lower limiting groove; the wheel train body comprises a screw rod straight tooth installed at the bottom of the screw rod body, and a limiting screw is fixed below the screw rod body to prevent the screw rod straight tooth from coming off the screw rod body.

[0015] Preferably, a recessed cover groove is arranged at the top center position of the center body, the cover groove is communicated with the accommodation inner cavity, and a cover plate is fixedly installed in the cover groove and is triangular in shape.

[0016] Preferably, a bottom plate body is installed at the bottom of the gear box, and the bottom plate body completely covers the lower opening of the wheel train accommodation groove.

[0017] Preferably, a first sealing ring is arranged between the gear box and the sliding groove connecting part to prevent external water vapor from entering the accommodation inner cavity from the joint surface therebetween, and a second sealing ring is arranged between the gear box and the bottom plate body to prevent external water vapor from entering the accommodation inner cavity from the joint surface therebetween.

[0018] (Three) beneficial effects

[0019] Compared with the prior art, the whole structure of the utility model is compact, small in size, large in stroke, high in sliding precision of the opening and closing jaws and good in sliding smoothness. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without paying creative labor.

[0021] Figure 1The whole structure perspective view of the utility model is shown in the figure;

[0022] Figure 2 The exploded view of the utility model is shown in the figure;

[0023] Figure 3 The exploded view of part of the structure of the utility model is shown in the figure;

[0024] Figure 4 The top view of the utility model is shown in the figure;

[0025] Figure 5 The cross-sectional view along the A-A line in the figure (the opening and closing clamping jaw is in the opening state); Figure 4

[0026] The cross-sectional view along the A-A line in the figure (the opening and closing clamping jaw is in the opening state); Figure 6 The left view of the utility model is shown in the figure (the opening and closing clamping jaw is in the retracted state).

[0027] Explanation of reference signs:

[0028] 1, opening and closing clamping jaw; 2, middle pushing sliding block; 3, screw main body; 4, wheel system main body; 5, motor; 6, sliding groove frame; 7, gear box; 8, stroke limiting rod; 9, upper bearing; 10, lower bearing; 11, limiting screw; 12, cover plate; 13, bottom plate main body; 14, upper and lower shell connecting bolt;

[0029] 15, first sealing ring; 16, second sealing ring; 17, gap;

[0030] 011, inclined surface guide groove; 012, stroke guide groove; 013, tooth-shaped guide column;

[0031] 021, middle pushing cylinder; 022, inclined surface sliding block;

[0032] 41, screw straight teeth;

[0033] 61, horizontal sliding groove; 62, upper accommodating groove; 63, middle pushing guide column; 64, cover groove; 65, limiting screw mounting hole; 66, tooth groove unit; 67, center body; 68, side groove body; 69, connecting corner block;

[0034] 71, lower accommodating groove; 72, screw positioning column; 73, wheel system accommodating groove;

[0035] 211, inner transmission thread;

[0036] 631, middle pushing guide hole;

[0037] 721, screw positioning hole; 722, upper limiting groove; 723, lower limiting groove. DETAILED DESCRIPTION

[0038] In order to make the above objects, features and advantages of the utility model more apparent, obvious and easy to understand, the specific embodiments of the utility model are described in detail below. In the following description, a large number of specific details are set forth in order to fully understand the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the utility model, so the utility model is not limited by the specific implementation disclosed below.

[0039] The specific embodiments of the utility model are described in detail below with reference to the accompanying drawings. Figures 1-6 The compact high-precision large-stroke multi-design heart electric clamping jaw of the utility model is further described.

[0040] The utility model discloses a compact high-precision large-stroke multi-design heart electric clamping jaw, including the casing, be equipped with the accommodation inner chamber in the casing, the upper portion of casing is equipped with n respectively with the horizontal slide groove 61 of accommodation inner chamber intercommunication, n is the natural number of ≥2, n horizontal slide groove 61 surrounds the same axis arrangement, each horizontal slide groove 61 is slidably connected with one open-close clamping jaw 1, the compact high-precision large-stroke multi-design heart electric clamping jaw still includes the clamping jaw opening and closing drive unit in the accommodation inner chamber, and the clamping jaw opening and closing drive unit includes: middle push slider 2, screw main part 3 and rotary power, and the middle push slider 2 includes: middle push cylinder 021 and the n inclined surface sliding block 022 located in the top of middle push cylinder 021, each open-close clamping jaw 1 is equipped with the inclined surface guide groove 011 with the shape matching of inclined surface sliding block 022 on the side close to middle push slider 2, and each inclined surface guide groove 011 is slidably connected with an inclined surface sliding block 022, and the middle push cylinder 021 is threadedly connected with screw main part 3, and the lower portion of each open-close clamping jaw 1 is equipped with the recessed stroke guide groove 012, and the groove bottom of each horizontal slide groove 61 is equipped with a limit screw mounting hole 65, and each limit screw mounting hole 65 is equipped with a stroke limit rod 8, and the lower end of stroke limit rod 8 is fixed in limit screw mounting hole 65, and the upper end of stroke limit rod 8 extends into stroke guide groove 012, and the both sides of horizontal slide groove 61 are respectively equipped with a recessed gear-shaped guide groove, and the outer wall of open-close clamping jaw 1 is respectively equipped with the protruding gear-shaped guide column 013, the shape of gear-shaped guide column 013 is matched with gear-shaped guide groove, gear-shaped guide column 013 extends into gear-shaped guide groove, and there is a gap 17 between the bottom of open-close clamping jaw 1 and the bottom of horizontal slide groove 61.

[0041] In the embodiment, the middle push cylinder 021 and the screw main part 3 form a spiral transmission structure, the rotary power is located in the accommodation inner chamber and on one side of the screw main part 3, and the rotary power is used to drive the screw main part 3 to rotate, so as to drive the middle push slider 2 to ascend and descend and push the n open-close clamping jaws 1 to extend and retract along the corresponding horizontal slide grooves 61 synchronously.

[0042] In the embodiment, the top of the middle pushing slider 2 and each opening and closing jaw 1 form a set of inclined force transmission structures respectively, which can convert the vertical lifting action of one middle pushing slider 2 into the horizontal synchronous expansion and contraction action of multiple opening and closing jaws 1, and realize the opening and closing of the electric jaw.

[0043] The screw rod body 3 is driven by rotary power, and the rotary power can be the structure of the motor 5 driving the gear train. The gear train body 4 can be formed by meshing multiple gears. The gear train body 4 has two functions. One is to connect the motor 5 and the screw rod body 3 through the gear train body 4, and transmit the power of the motor 5 to the screw rod body 3. The other is that in specific implementation, the speed ratio of the gear train body 4 can be set according to the requirement, so as to obtain the required rotary torque.

[0044] In the embodiment, the extension direction of the stroke guide groove 012 is the same as the sliding direction of the opening and closing jaw 1, and the stroke limiting rod 8 is used for providing mechanical limiting for the inclined guide groove 011, so as to ensure that the inclined guide groove 011 always slides within the predetermined stroke, and improve the safety in use.

[0045] In the embodiment, the tooth-shaped guide column 013 is inserted into the tooth-shaped guide groove, and the opening and closing jaw 1 and the horizontal sliding groove 61 have a gap 17. That is, the tooth-shaped guide groove wall and the tooth-shaped guide column 013 are matched to realize the suspended support of the opening and closing jaw 1. The bottom of the opening and closing jaw 1 and the horizontal sliding groove 61 do not contact and do not have friction force. The two outer sides of the opening and closing jaw 1 are subjected to symmetrical supporting force and symmetrical friction force, and always slide along the tooth-shaped guide groove. The structure ensures the balance of the force of the opening and closing jaw 1, is beneficial to improving the sliding precision of the opening and closing jaw 1, and effectively avoids the jamming.

[0046] Therefore, as known from the above, the structure of the utility model can form a multi-jaw centering clamping structure, the opening and closing jaw 1 has good force effect, and the sliding precision and smoothness of the opening and closing jaw 1 can be improved. The compact high-precision large-stroke multi-centering electric jaw has reasonable overall structure design, can greatly reduce the overall size, vertically and side by side arranges the rotary power on one side of the screw rod body 3, fully utilizes the space of the side of the screw rod body 3, does not increase the overall width size of the utility model, and greatly shortens the overall length of the utility model.

[0047] According to the specific embodiment of the utility model, each tooth-shaped guide groove includes m tooth groove units 66, m is a natural number greater than or equal to 2; and the m tooth groove units 66 are sequentially arranged along the height direction of the tooth-shaped guide groove; the cross section of the tooth groove unit 66 is trapezoidal, and the slot width of the tooth groove unit 66 is greater than the slot bottom width.

[0048] More specifically, m=3.

[0049] In the embodiment, the plurality of tooth groove units 66 jointly support the opening and closing clamping jaw 1, the stability of the support can be ensured, and the plurality of tooth groove units 66 are sequentially arranged along the height direction of the tooth-shaped guide groove, so that the smoothness of the guide can be further improved. The tooth groove unit 66 adopts a trapezoidal cross section, which is beneficial to improving the guiding accuracy.

[0050] According to the specific embodiment of the utility model, the shell includes a chute frame 6 and a gear box 7 which are detachably connected; the chute frame 6 includes a chute main body part and a chute connecting part which are fixedly connected; the chute connecting part is cylindrical as a whole, n=3, the chute main body part includes a center body 67 which is equilateral triangular as a whole, the chute main body part further includes three edge groove bodies 68 which are fixedly arranged around the three outer sides of the center body 67, the outer end part of the edge groove body 68 protrudes out of the outer side wall of the chute connecting part, and the edge groove body 68 is rectangular as a whole; one horizontal chute 61 is arranged on each edge groove body 68, and the horizontal chute 61 is recessed from the top surface of the edge groove body 68; the accommodation inner cavity includes an upper accommodation groove 62, the lower part of the upper accommodation groove 62 penetrates through the chute connecting part, the upper part of the upper accommodation groove 62 penetrates through the center body 67 and communicates with each horizontal chute 61; the bottom of the upper accommodation groove 62 is provided with a protruding middle push guide column 63, the middle push guide column 63 is provided with a middle push guide hole 631 which penetrates therethrough, and a middle push cylinder 021 is arranged in the middle push guide hole 631 and is slidably connected to the middle push guide hole 631; the gear box 7 is cylindrical as a whole and has the same outer diameter as the chute connecting part; the accommodation inner cavity further includes a lower accommodation groove 71 arranged on the top of the gear box 7, the bottom of the lower accommodation groove 71 is provided with a protruding lead screw positioning column 72, the lead screw positioning column 72 is provided with a lead screw positioning hole 721 which penetrates therethrough, the accommodation inner cavity further includes a wheel system accommodation groove 73 arranged on the bottom of the gear box 7, and the wheel system accommodation groove 73 communicates with the lower accommodation groove 71 and the lead screw positioning hole 721 respectively, the lower part of the middle push cylinder 021 is provided with an inner transmission thread 211, the upper part of a lead screw body 3 extends into the middle push cylinder 021, and the top of the lead screw body 3 is threadedly connected with the inner transmission thread 211; the lower part of the lead screw body 3 penetrates through the lead screw positioning hole 721 and is rotatably connected to the lead screw positioning hole 721.

[0051] In the embodiment, the chute connecting part and the gear box 7 are in overall alignment in the vertical direction, which is beneficial to make the overall structure of the utility model more compact.

[0052] In the embodiment, the shell is in a split structure, which is beneficial to assembly and can reduce processing difficulty and cost. The screw rod positioning hole 721 can directly or indirectly contact the lower part of the screw rod body 3 to ensure smooth rotation of the screw rod body 3 around its own axis. The middle pushing guide column 63 is used to form a middle pushing guide hole 631 connected to the middle pushing cylinder 021 in sliding mode, which ensures the stability and accuracy of the up-down movement track of the middle pushing slider 2. Since the motor 5 is vertically arranged, the length of the motor 5 is relatively long, and the upper and lower parts of the motor 5 are arranged in the chute frame 6 and the gear box 7 respectively, so that the chute frame 6 and the gear box 7 jointly accommodate the motor 5, which ensures that the motor 5 is completely accommodated in the shell. According to the shape of each functional component, a corresponding accommodation groove is arranged in the split structure of the shell, for example, the wheel system body 4 is arranged in the corresponding wheel system accommodation groove 73, the lower part of the middle pushing cylinder 021 is arranged in the middle pushing guide hole 631, and the lower part of the screw rod body 3 penetrates through the screw rod positioning hole 721. Different from the structure in which all functional components are arranged in the same large mounting cavity, the structure can directly form a guide and limiting structure in the chute frame 6 and the gear box 7, which is beneficial to reduce the number of components and to stably mount each functional component.

[0053] According to the specific embodiment of the utility model, the four components of the chute frame 6, the gear box 7, the middle pushing cylinder 021 and the screw rod body 3 share a common central axis.

[0054] The structure of the embodiment can improve the overall symmetry of the utility model and is beneficial to further reduce the volume.

[0055] According to the specific embodiment of the utility model, one connecting corner block 69 is further fixedly connected between the two adjacent edge groove bodies 68, the lower part of the connecting corner block 69 is fixed to the upper part of the central body 67, the upper part of the connecting corner block 69 is lower than the upper part of the edge groove body 68, and the chute connecting part, the central body 67, the edge groove body 68 and the connecting corner block 69 are in an integrated structure; the compact high-precision large-stroke multi-specification electric clamp jaw further comprises an upper-lower shell connecting bolt 14 penetrating through the connecting corner block 69 and extending into the gear box 7.

[0056] In the embodiment, the connecting corner block 69 plays a role of a reinforcing block, can improve the connection stability between the two adjacent edge groove bodies 68 and the center body 67, and is used for prolonging the screwing length of the upper and lower shell connecting bolts 14, thereby facilitating improvement of the screwing stability.

[0057] According to the specific embodiment of the utility model, the clamping jaw opening and closing driving unit further comprises a wheel train body 4 and a motor 5, the lower part of the motor 5 is arranged in the lower accommodating groove 71, the upper part of the motor 5 is arranged in the upper accommodating groove 62, the wheel train body 4 is installed in the wheel train accommodating groove 73, the lower part of the screw rod body 3 is connected with one side of the wheel train body 4, the other side of the wheel train body 4 is connected with the lower part of the motor 5, and the motor 5 is vertically arranged on one side of the screw rod body 3; the wheel train body 4 can transmit the rotating power of the motor 5 to the screw rod body 3 and drive the middle push sliding block 2 to lift to push n opening and closing clamping jaws 1 to synchronously stretch and contract along the corresponding horizontal sliding groove 61; the input rotating speed of the wheel train body 4 is greater than the output rotating speed of the wheel train body 4.

[0058] In the embodiment, the wheel train body 4 is used for reducing speed and increasing torque, that is, the wheel train body 4 transmits the rotating speed of the motor 5 to the screw rod body 3 after speed reduction to increase the rotating torque, and finally increase the clamping force of the opening and closing clamping jaw 1.

[0059] According to the specific embodiment of the utility model, the upper and lower ends of the screw rod positioning hole 721 are both provided with recessed upper and lower limiting grooves 722 and 723; the clamping jaw opening and closing driving unit further comprises upper and lower bearings 9 and 10 respectively arranged around the screw rod body 3, and the upper bearing 9 is installed in the upper limiting groove 722 and the lower bearing 10 is installed in the lower limiting groove 723; the wheel train body 4 comprises a screw rod straight tooth 41 installed at the bottom of the screw rod body 3, and the lower part of the screw rod body 3 is fixed with a limiting screw 11 used for preventing the screw rod straight tooth 41 from being taken out of the screw rod body 3 downward.

[0060] In the embodiment, the screw rod positioning column 72 is used for forming the screw rod positioning hole 721 and the bearing accommodating structure and the axial limiting structure of the screw rod body 3. Specifically, through cooperation of the upper and lower limiting grooves 722 and 723, the upper and lower bearings 9 and 10, the limiting screw 11 and the screw rod straight tooth 41, the freedom degree of the screw rod body 3 moving along the axis can be limited, the screw rod body 3 is only allowed to have the freedom degree of rotating along the axis, and accurate transmission is ensured. More specifically, the upper and lower bearings 9 and 10 are both thrust ball bearings, and when the screw rod body 3 rotates, part of the structure of the thrust ball bearing rotates with the screw rod body 3, and part of the structure is fixed.

[0061] According to the specific embodiment of the utility model, the top center position of the center body 67 is provided with a recessed cover groove 64, the cover groove 64 is communicated with the accommodation inner cavity, a cover plate 12 is fixedly installed in the cover groove 64, and the cover plate 12 is triangular as a whole.

[0062] In the embodiment, the cover plate 12 covers the top of the accommodation inner cavity, so that foreign matters from outside can be reduced to enter the accommodation inner cavity, and the protection level of the utility model is improved.

[0063] According to the specific embodiment of the utility model, the bottom of the gear box 7 is provided with a bottom plate body 13, and the bottom plate body 13 completely covers the lower opening of the wheel train accommodation groove 73.

[0064] According to the specific embodiment of the utility model, the first sealing ring 15 for preventing external water vapor from entering the accommodation inner cavity from the joint surface between the gear box 7 and the sliding groove connecting part is arranged, and the second sealing ring 16 for preventing external water vapor from entering the accommodation inner cavity from the joint surface between the gear box 7 and the bottom plate body 13 is arranged.

[0065] In the embodiment, the above structure is adopted, so that the protection level of the accommodation inner cavity can be further improved.

[0066] More specifically, the embodiment can also integrate electrical connection and control elements in the free space of the lower accommodation groove 71, so that the external power source can be connected, and the intelligent control of the action parameters (such as clamping time, start-stop position, etc.) of the opening and closing clamping jaw 1 can be realized.

[0067] It should be noted that the drawings of the specification of the utility model are all taken as an example of n=3, that is, the structure shown in the drawings of the specification is a high-integration small-size three-design center electric clamping jaw, according to the use requirement, n can be set as 2 or 4 or 5 or other numbers, so as to form a center electric clamping jaw with other number of clamping jaws.

[0068] As can be seen from the above, the utility model has the advantages of high integration, small overall volume and large opening and closing stroke in addition to the advantages of multi-claw self-centering.

[0069] In the description of the utility model, it should be noted that, unless otherwise specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements, or it can be "driven connection", that is, through various suitable ways such as belt drive, gear drive or chain wheel drive, power connection. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

Claims

1. A compact high-precision large-stroke multi-designation electrically operated clamping jaw, characterized in that, The utility model provides a compact high-precision large-stroke multi-designing electric clamp, comprising a shell, a receiving cavity is arranged in the shell, the upper portion of the shell is provided with n horizontal sliding grooves which are communicated with the receiving cavity respectively, n is a natural number greater than or equal to 2, and the n horizontal sliding grooves are arranged around the same axis; one opening and closing clamp jaw is slidably connected in each horizontal sliding groove; the compact high-precision large-stroke multi-designing electric clamp further comprises a clamp opening and closing driving unit arranged in the receiving cavity; the clamp opening and closing driving unit comprises a middle pushing sliding block, a screw rod body and a rotary power; the middle pushing sliding block comprises a middle pushing cylinder and n inclined surface sliding blocks arranged on the top of the middle pushing cylinder; each opening and closing clamp jaw is provided with an inclined surface guide groove matched with the shape of the inclined surface sliding block on the side close to the middle pushing sliding block; one inclined surface sliding block is slidably connected in each inclined surface guide groove; the middle pushing cylinder is threadedly connected with the screw rod body; the lower portion of each opening and closing clamp jaw is provided with a recessed stroke guide groove; the groove bottom of each horizontal sliding groove is provided with a limiting screw mounting hole; a stroke limiting rod is arranged in each limiting screw mounting hole; the lower end of the stroke limiting rod is fixed in the limiting screw mounting hole; the upper end of the stroke limiting rod extends into the stroke guide groove; the two side walls of the horizontal sliding groove are respectively provided with a recessed tooth-shaped guide groove; the outer side wall of the opening and closing clamp jaw is respectively provided with a protruding tooth-shaped guide column; the shape of the tooth-shaped guide column is matched with the tooth-shaped guide groove; the tooth-shaped guide column extends into the tooth-shaped guide groove; and a gap is formed between the bottom of the opening and closing clamp jaw and the bottom of the horizontal sliding groove.

2. The compact high precision large stroke multi-designating electro-pincer according to claim 1, wherein, Each tooth-shaped guide groove comprises m tooth groove units, m is a natural number greater than or equal to 2; and the m tooth groove units are sequentially arranged along the height direction of the tooth-shaped guide groove; the cross section of the tooth groove unit is trapezoidal, and the slot opening width of the tooth groove unit is greater than the slot bottom width.

3. The compact high precision large stroke multi-designating electro-pincer according to claim 2, characterized in that, The shell comprises a chute frame and a gear box which are detachably connected; the chute frame comprises a chute main body and a chute connecting part which are fixedly connected; the chute connecting part is cylindrical, n=3, the chute main body comprises a center body which is equilateral triangular, the chute main body further comprises three edge groove bodies which are fixedly connected around the three outer sides of the center body respectively, the outer end of the edge groove body protrudes from the outer wall of the chute connecting part, and the edge groove body is rectangular; one horizontal chute is arranged on each edge groove body and is recessed from the top surface of the edge groove body; the receiving cavity comprises an upper receiving groove, the lower part of the upper receiving groove penetrates through the chute connecting part, the upper part of the upper receiving groove penetrates through the center body and is communicated with each horizontal chute; the bottom of the upper receiving groove is provided with a protruding middle pushing guide column, the middle pushing guide column is provided with a middle pushing guide hole penetrating therethrough, the lower part of the middle pushing cylinder is arranged in the middle pushing guide hole and is slidably connected with the middle pushing guide hole; the gear box is cylindrical and has the same outer diameter as the chute connecting part; the receiving cavity further comprises a lower receiving groove arranged on the top of the gear box, the bottom of the lower receiving groove is provided with a protruding lead screw positioning column, the lead screw positioning column is provided with a lead screw positioning hole penetrating therethrough, the receiving cavity further comprises a wheel system receiving groove arranged on the bottom of the gear box, and the wheel system receiving groove is communicated with the lower receiving groove and the lead screw positioning hole respectively, the lower part of the middle pushing cylinder is provided with an inner transmission screw thread, the upper part of the lead screw body extends into the middle pushing cylinder, and the top of the lead screw body is threadedly connected with the inner transmission screw thread; the lower part of the lead screw body penetrates through the lead screw positioning hole and is rotatably connected with the lead screw positioning hole.

4. The compact high precision large stroke multi-designating electro-pincer according to claim 3, characterized in that, The chute frame, the gear box, the middle pushing cylinder and the lead screw body share a common central axis.

5. The compact high-precision large-stroke multi-designation electrodynamic jaw according to claim 4, characterized in that, A connecting corner block is further fixedly connected between two adjacent edge groove bodies, the lower part of the connecting corner block is fixedly connected with the upper part of the center body, the upper part of the connecting corner block is lower than the upper part of the edge groove body, and the chute connecting part, the center body, the edge groove body and the connecting corner block are an integral structure; the compact high-precision large-stroke multi-specification electric clamping jaw further comprises an up-down shell connecting bolt which penetrates through the connecting corner block and extends into the gear box.

6. The compact high precision large stroke multi-designating electro-pincer according to claim 5, characterized in that, The clamping jaw opening and closing driving unit further comprises a wheel system body and a motor, the lower part of the motor is arranged in the lower receiving groove, the upper part of the motor is arranged in the upper receiving groove, the wheel system body is arranged in the wheel system receiving groove, the lower part of the lead screw body is connected with one side of the wheel system body, the other side of the wheel system body is connected with the lower part of the motor, and the motor is vertically arranged on one side of the lead screw body; the wheel system body can transmit the rotary power of the motor to the lead screw body and drive the middle pushing block to ascend and descend, so as to drive n opening and closing clamping jaws to synchronously extend and retract along the corresponding horizontal chute; the input rotation speed of the wheel system body is greater than the output rotation speed of the wheel system body.

7. The compact high precision large stroke multi-designating electro-pincer according to claim 6, characterized in that, The upper and lower ends of the screw rod positioning hole are provided with recessed upper and lower limiting grooves; the clamping jaw opening and closing driving unit further comprises upper and lower bearings respectively arranged around the screw rod body, and the upper bearing is installed in the upper limiting groove and the lower bearing is installed in the lower limiting groove; the wheel train body comprises a screw rod straight tooth installed at the bottom of the screw rod body, and a limiting screw for preventing the screw rod straight tooth from being pulled out of the screw rod body is fixed below the screw rod body.

8. The compact high-precision large-stroke multi-designation electrodynamic jaw according to claim 7, characterized in that, A recessed cover groove is arranged at the top center position of the center body, and the cover groove is in communication with the accommodation inner cavity; a cover plate is fixedly installed in the cover groove, and the cover plate is triangular in whole.

9. The compact high precision large stroke multi-designation electrodynamic jaw according to claim 8, characterized in that, A bottom plate body is installed at the bottom of the gear box, and the bottom plate body completely covers the lower opening of the wheel train accommodation groove.

10. The compact high-precision large-stroke multi-designation electrodynamic jaw according to claim 9, characterized in that, A first sealing ring is arranged between the gear box and the sliding groove connecting part for preventing external water vapor from entering the accommodation inner cavity from the joint surface therebetween, and a second sealing ring is arranged between the gear box and the bottom plate body for preventing external water vapor from entering the accommodation inner cavity from the joint surface therebetween.

Images