Universal jig clamping equipment

Abstract

The utility model discloses universal jig clamping equipment. A top plate and a bottom plate of a clamping table are an upper supporting plate and a lower supporting plate respectively. A centering clamping device is arranged on the upper supporting plate and comprises a differential driving mechanism, two sets of transverse clamping plates moving in the left-right direction and two sets of longitudinal clamping plates moving in the front-back direction. The two groups of transverse clamping plates are driven by a transverse clamping driving mechanism; the two groups of longitudinal clamping plates are driven by a longitudinal clamping driving mechanism; the differential transmission mechanism drives the transverse clamping driving mechanism and the longitudinal clamping driving mechanism to move synchronously or asynchronously. And the two groups of longitudinal clamping plates are in sliding connection with the two groups of transverse clamping plates. The utility model aims to provide the universal jig clamping equipment which can be used for quickly mounting and clamping jigs with different specifications and quickly centering the clamped jigs so as to improve the jig replacement efficiency and the subsequent processing precision.

Description

Technical Field

[0001] The utility model relates to the field of jigs, and in particular to a universal jig clamping device. Background Art

[0002] In the field of industrial production, jigs are a type of equipment widely used for positioning and fixing various workpieces. Especially in the field of substrate cutting, existing jigs are often designed for specific substrate sizes and shapes, resulting in poor versatility. Processing workpieces of different sizes requires the jig to be removed and replaced from the workbench. In addition, when the jig is fastened to the workbench through multiple fasteners, the installation and disassembly process of the jig often requires a lot of time and manpower, which seriously affects work efficiency. For example, in the chip manufacturing process, cutting substrates of different specifications requires the replacement of a jig that matches them. Therefore, it is an urgent problem to design a universal jig clamping device to simplify the installation process of jigs of different specifications, improve the adaptability of jigs of different specifications, and thus improve production efficiency.

[0003] Patent application number 202121393760.5, "An Adjustable Metal Fixture Clamping Device", discloses an adjustable metal fixture clamping device, in which a first motor is installed on the left end face of the bottom box, a first threaded rod is connected to the output end of the first motor, a lifting plate is provided directly above the first threaded rod, sliding openings are provided on the front and rear sides of the upper left end and the front and rear sides of the upper right end of the bottom box, clamps are provided on the left and right sides of the top of the bottom box, a rotating rod is rotatably penetrated in the middle of the upper end face of the bottom box, and a ring-shaped placement plate is connected to the top of the rotating rod. The third motor can drive the workpiece to rotate to a certain angle, so as to facilitate the adjustment of the position where the workpiece needs to be positioned and clamped, the first motor can drive the first sliders on the left and right sides to move relative or apart, and then adjust the height of the clamp, so as to adapt to the positioning and clamping of workpieces of different heights, and the second motor can drive the clamp to contact the workpiece, so that workpieces of different sizes can be clamped.

[0004] The above technology only clamps the workpiece from two sides, cannot prevent the workpiece from being displaced during processing, and does not have a centering function, which will affect the subsequent processing accuracy of the product. Utility Model Content

[0005] The utility model aims to provide a universal fixture clamping device, which can quickly install and clamp fixtures of different specifications and can quickly align the clamped fixtures to improve the fixture replacement efficiency and subsequent processing accuracy.

[0006] The utility model adopts the following technical solutions:

[0007] A universal fixture clamping device comprises a clamping table, wherein the clamping table is a rectangular structure with a hollow cavity and four side plates each having a horizontal through slot, wherein the top plate and the bottom plate of the clamping table are an upper support plate and a lower support plate respectively; a centering clamping device is arranged on the upper support plate, and the centering clamping device comprises a differential drive mechanism, two groups of transverse clamping plates moving in the left and right directions, and two groups of longitudinal clamping plates moving in the front and rear directions; the two groups of transverse clamping plates are driven by a transverse clamping drive mechanism and move synchronously in opposite directions or in opposite directions to meet the clamping installation or Loosen and dismantle; the two groups of longitudinal clamping plates are driven by the longitudinal clamping drive mechanism and move synchronously in opposite directions. The synchronous movement can improve the clamping accuracy and centering accuracy of the device for the fixture; the differential transmission mechanism drives the transverse clamping drive mechanism and the longitudinal clamping drive mechanism to move synchronously or asynchronously; the two groups of longitudinal clamping plates are slidably connected with the two groups of transverse clamping plates; the transverse clamping drive mechanism, the longitudinal clamping drive mechanism and the differential transmission mechanism are all arranged in the hollow cavity of the clamping table to prevent the debris generated when cutting the workpiece from splashing into the parts of the device.

[0008] Furthermore, the two groups of transverse clamping plates have the same structure, both of which include a transverse clamping portion arranged on the upper surface of the upper support plate, a transverse sliding portion on the outer side of the front and rear surfaces of the upper support plate, and a transverse connecting portion arranged in the hollow cavity of the clamping platform along the front and rear directions; the transverse clamping portion, the transverse connecting portion and the front and rear transverse sliding portions form a square-shaped structure; the two transverse clamping portions are both provided with longitudinal clamping plate sliding grooves along the front and rear directions;

[0009] The two groups of longitudinal clamping plates have the same structure, both including a longitudinal clamping portion arranged on the upper surface of the upper support plate and slidably connected to the longitudinal clamping plate slide groove, a longitudinal sliding portion on the outer side of the left and right surfaces of the upper support plate, and a longitudinal connecting portion arranged in the hollow cavity of the clamping platform along the left and right directions.

[0010] Furthermore, left and right sliding rails are horizontally arranged on the surfaces of the front and rear side plates of the clamping platform in contact with the transverse sliding part, and left and right sliding grooves matched with the left and right sliding rails are arranged at the corresponding positions of the transverse sliding part; front and rear sliding rails are horizontally arranged on the surfaces of the left and right side plates of the clamping platform in contact with the longitudinal sliding part, and front and rear sliding grooves matched with the front and rear sliding rails are arranged at the corresponding positions of the longitudinal sliding part; the left and right sliding rails and the front and rear sliding rails cooperate with the left and right sliding grooves and the front and rear sliding grooves, so that the movement of the longitudinal clamping plate and the transverse clamping plate is more stable.

[0011] Furthermore, the longitudinal clamping plate slide groove is a rectangular through groove, and the transverse clamping plate and the longitudinal clamping plate are both made of metal.

[0012] Furthermore, the transverse clamping drive mechanism includes a transverse rack transmission group and a first drive shaft provided with a first drive gear. The transverse rack transmission group consists of two upper and lower racks. The upper and lower ends of the first drive gear are respectively meshed with the upper and lower racks; the outer ends of the upper and lower racks are respectively connected to the transverse connecting parts of the two transverse clamping plates; the first drive shaft is fixed to the support plate under the clamping platform through bearings and bearing seats to improve the stability of the first drive shaft during rotation.

[0013] Furthermore, the longitudinal clamping drive mechanism includes a longitudinal rack transmission group and a second drive shaft provided with a second drive gear. The longitudinal rack transmission group consists of two upper and lower racks, and the upper and lower ends of the second drive gear are respectively meshed with the upper and lower racks; the outer ends of the upper and lower racks are respectively connected to the longitudinal connecting parts of the two longitudinal clamping plates; the second drive shaft is fixed to the support plate under the clamping table through bearings and bearing seats to improve the stability of the second drive shaft during rotation.

[0014] Furthermore, the differential transmission mechanism includes a differential gear set, a first horizontal transmission gear and a vertical transmission gear set; the differential gear set includes an input shaft, a side wheel, a planetary gear and a longitudinal sun gear; the input shaft is rotatably connected to the support plate on the clamping table; the side wheel is mounted on the first rotating shaft through a bearing sleeve, the longitudinal sun gear is coaxially fixedly connected to the first rotating shaft and is arranged on the right side of the side wheel, and a horizontal frame is also vertically arranged on the end face of the side wheel, the planetary gear is rotatably connected to the horizontal frame through a vertical rotating shaft, and the longitudinal sun gear and the planetary gear both adopt bevel gears and mesh with each other; the side wheel adopts a worm gear, and a worm is arranged at the end of the input shaft, and the worm gear and the worm can realize the locking of the longitudinal clamping plate and the transverse clamping plate by locking the differential transmission mechanism; the first horizontal transmission gear adopts a bevel gear and meshes with the planetary gear, and the first horizontal transmission gear synchronously drives the second drive shaft to rotate; the first rotating shaft is rotatably connected to the lower support plate, and the first rotating shaft drives the first drive shaft to rotate synchronously through the vertical transmission gear set.

[0015] Furthermore, the first horizontal transmission gear is coaxially arranged at the left end of the second driving shaft; the vertical transmission gear group includes a first vertical transmission gear, a second horizontal transmission gear, a bevel gear plate and a second vertical transmission gear; the first vertical transmission gear is coaxially fixedly connected to the first rotating shaft and is arranged on the left side of the side wheel, the first vertical transmission gear and the second horizontal transmission gear both adopt bevel gears and mesh with each other, the second horizontal transmission gear and the bevel gear plate are coaxially fixedly arranged on the second rotating shaft and arranged up and down, the second vertical transmission gear adopts a bevel gear and meshes with the bevel gear plate, and the second vertical transmission gear is coaxially arranged at the rear end of the first driving shaft.

[0016] Furthermore, the two transverse clamping parts are both provided with a longitudinal adjustment plate slide groove, the longitudinal adjustment plate is slidably connected in the longitudinal adjustment plate slide groove, and longitudinal return springs are provided at both ends of the longitudinal adjustment plate and on the corresponding sides of the longitudinal adjustment plate slide groove, and the longitudinal return spring can reset the longitudinal adjustment plate to the center after the transverse clamping plate is released; transverse adjustment plate slide grooves are both provided on the two longitudinal clamping parts along the left and right directions, the transverse adjustment plate is slidably connected in the transverse adjustment plate, and transverse return springs are provided at both ends of the transverse adjustment plate and on the corresponding sides of the transverse adjustment plate slide groove, and the transverse return spring can reset the transverse adjustment plate to the center after the longitudinal clamping plate is released.

[0017] Furthermore, the lifting mechanism includes two groups of scissor-type lifting structures arranged symmetrically on the left and right, each group of scissor-type lifting structures includes an upper slide rail and a lower slide rail, and each slide rail is provided with a fixed block and a sliding block; the upper fixed block is fixed to the lower surface of the lower support plate, and the lower fixed block is used to be fixed to the upper surface of the workbench, and the two sliding blocks are respectively slidably connected to the corresponding slide rails, the upper fixed block and the lower sliding block are respectively hinged to the two ends of the first connecting rod, the upper sliding block and the lower fixed block are respectively hinged to the two ends of the second connecting rod, the first connecting rod is hinged to the middle part of the second connecting rod, and the lower sliding blocks in the two groups of scissor-type lifting structures are connected through a lifting connection part provided with a screw nut, the screw nut is threadedly connected to the lifting threaded rod, and the end of the lifting threaded rod is provided with a second rotating handle.

[0018] The utility model can quickly disassemble and assemble jigs of different specifications through the above technology, simplifies the disassembly and assembly process of jigs of different specifications, has strong versatility, and can effectively improve production efficiency. At the same time, the utility model has a fast centering function, which can improve the efficiency of jig replacement and subsequent processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an axonometric diagram of the universal fixture clamping device in the utility model;

[0020] Figure 2 This is a schematic diagram of the transverse clamping plate in the utility model;

[0021] Figure 3 This is a schematic diagram of the longitudinal clamping plate in the utility model;

[0022] Figure 4 It is a schematic diagram of the centering clamping device, the transverse driving mechanism, the longitudinal driving mechanism and the differential transmission mechanism in the utility model;

[0023] Figure 5 It is a schematic diagram of the transverse drive mechanism, longitudinal drive mechanism and differential transmission mechanism in the utility model;

[0024] Figure 6 For the utility model Figure 5 A magnified schematic diagram of part A;

[0025] Figure 7 This is a schematic diagram of the clamping platform and the lifting mechanism in the utility model;

[0026] Figure 8 This is a schematic diagram of the fixing relationship between the input shaft and the clamping platform in the utility model;

[0027] Fig. 9 This is a schematic diagram of the fixing relationship between the second driving shaft and the clamping platform in the utility model;

[0028] Fig.10 This is a schematic diagram of the fixing relationship between the first driving shaft and the clamping platform in the utility model;

[0029] Fig.11 It is a schematic diagram of the fixing relationship between the side wheels and the planetary gears in the utility model. DETAILED DESCRIPTION

[0030] The present invention is described in detail below with reference to the accompanying drawings and embodiments:

[0031] like Figures 1 to 11 As shown, the universal fixture clamping device described in the utility model comprises a clamping table 1, which is a rectangular structure with a hollow cavity and four side plates each having horizontal through grooves, and the top plate and the bottom plate of the clamping table 1 are respectively an upper support plate 2 and a lower support plate 3 with flat surfaces;

[0032] like Figure 1 As shown, a centering clamping device is provided on the upper support plate 2, and the centering clamping device is composed of a differential transmission mechanism, two groups of transverse clamping plates 4 moving in the left and right directions, and two groups of longitudinal clamping plates 5 moving in the front and rear directions; the two groups of transverse clamping plates 4 are driven by the transverse clamping drive mechanism and move synchronously in the opposite direction or in the opposite direction; the two groups of longitudinal clamping plates 5 are driven by the longitudinal clamping drive mechanism and move synchronously in the opposite direction or in the opposite direction; the differential transmission mechanism provides power for the transverse clamping drive mechanism and the longitudinal clamping drive mechanism and realizes synchronous or asynchronous movement of the two; the two groups of longitudinal clamping plates 5 are both slidably connected with the two groups of transverse clamping plates 4; the transverse clamping drive mechanism, the longitudinal clamping drive mechanism and the differential transmission mechanism are all arranged in the hollow cavity of the clamping table 1;

[0033] In the present invention, two groups of transverse clamping plates 4 and two groups of longitudinal clamping plates 5 can effectively clamp the four sides of the jig located on the upper support plate 2. At the same time, since the two groups of transverse clamping plates 4 and the two groups of longitudinal clamping plates 5 are synchronously moving in opposite directions, the centering effect of the jig can be achieved. Therefore, the present invention can quickly install and clamp jigs of different specifications, and ensure that the jig is located at the center of the upper support plate, which can effectively improve the efficiency of jig replacement, thereby improving the processing accuracy of the subsequent workpiece to be cut, and preventing the reduction of product yield due to inaccurate position of the workpiece to be cut.

[0034] like Figure 2 As shown, in the utility model, the two groups of transverse clamping plates 4 with the same structure both include a transverse clamping portion 6 arranged on the upper surface of the upper support plate 2, a transverse sliding portion 32 on the outer sides of the front and rear surfaces of the upper support plate 2, and a transverse connecting portion 8 arranged in the hollow cavity of the clamping platform 1 along the front-to-back direction; the transverse clamping portion 6, the transverse connecting portion 8 and the front and rear transverse sliding portions 32 form a square structure; the two transverse clamping portions 6 are both provided with a longitudinal clamping plate slide groove 48 along the front-to-back direction;

[0035] like Figure 3 As shown, the two groups of longitudinal clamping plates 5 with the same structure both include a longitudinal clamping portion 9 arranged on the upper surface of the upper support plate 2 and slidably connected to the longitudinal clamping plate slide groove 48, a longitudinal sliding portion 7 on the outer sides of the left and right surfaces of the upper support plate 2, and a longitudinal connecting portion 10 arranged in the hollow cavity of the clamping platform 1 along the left and right directions; in this embodiment, the longitudinal clamping plate slide groove 48 can adopt a rectangular through groove.

[0036] In order to improve the service life of the utility model, the two groups of transverse clamping plates 4 and the two groups of longitudinal clamping plates 5 are made of metal. In order to ensure the stability of the transverse clamping plates 4 and the longitudinal clamping plates 5 during movement, the front and rear side plate surfaces of the clamping platform 1 in contact with the transverse sliding portion 32 are horizontally provided with left and right slide rails 35, and the corresponding positions of the transverse sliding portion 32 are provided with left and right slide grooves 36 adapted to the left and right slide rails 35; the left and right side plate surfaces of the clamping platform 1 in contact with the longitudinal sliding portion 7 are horizontally provided with front and rear slide rails 37, and the corresponding positions of the longitudinal sliding portion 7 are provided with front and rear slide grooves 38 adapted to the front and rear slide rails 37; in order to ensure the synchronization of the movement of the two groups of transverse clamping plates 4, such as Figure 4 As shown, in the utility model, the transverse clamping drive mechanism includes a transverse rack transmission group 11 and a first drive shaft 12 provided with a first drive gear 13. The transverse rack transmission group 11 is composed of an upper and lower rack. The upper and lower ends of the first drive gear 13 on the first drive shaft 12 are respectively meshed with the upper and lower racks; the outer ends of the upper and lower racks are respectively connected to the transverse connecting parts 8 of the two transverse clamping plates; the first drive shaft 12 is respectively fixed to the first support part 46 and the second support part 47 on the upper surface of the support plate 3 under the clamping table through two bearings and bearing seats.

[0037] Similarly, in order to ensure the synchronization of the movement of the two groups of longitudinal clamping plates 5, in the utility model, the longitudinal clamping drive mechanism includes a longitudinal rack transmission group 14 and a second drive shaft 16 provided with a second drive gear 15. The longitudinal rack transmission group 14 is composed of an upper and lower rack. The upper and lower ends of the second drive gear 15 on the second drive shaft 16 are respectively meshed with the upper and lower racks; the outer ends of the upper and lower racks are respectively connected to the longitudinal connecting parts 10 of the two longitudinal clamping plates 5; the second drive shaft 16 is fixed to the third support part 44 on the upper surface of the support plate under the clamping table and the fourth support part 45 on the lower surface of the support plate 2 on the clamping table through two bearings and bearing seats.

[0038] In order to further enhance the centering function and improve the clamping effect, in the utility model, the differential transmission mechanism includes a differential gear set, a first horizontal transmission gear 23 and a vertical transmission gear set;

[0039] The differential gear set includes an input shaft 18, a side wheel 19, a planetary gear 21 and a longitudinal sun wheel 22; the input shaft 18 is fixed to the fifth support portion 42 and the sixth support portion 43 on the lower surface of the support plate 2 of the clamping table through two bearings and a bearing sleeve; the side wheel 19 is arranged on the first rotating shaft 24 through a bearing sleeve, the longitudinal sun wheel 22 is coaxially fixedly connected with the first rotating shaft 24 and is arranged on the right side of the side wheel 19, and the end surface of the side wheel 19 is also vertically provided with a horizontal frame 20, the planetary gear 21 is rotatably connected with the horizontal frame 20 through a vertical rotating shaft, and the longitudinal sun wheel 22 is fixedly connected with the first rotating shaft 24 through a vertical rotating shaft. The sun gear 22 and the planetary gear 21 both adopt bevel gears and mesh with each other; the side wheel 19 adopts a worm wheel, and a worm is provided at the end of the input shaft 18, and the input shaft 18 and the side wheel 19 adopt a worm gear transmission method; the first horizontal transmission gear 23 adopts a bevel gear and meshes with the planetary gear 21, and the first horizontal transmission gear 23 is coaxially arranged at the left end of the second drive shaft 16 to realize power transmission and drive the rotation of the second drive shaft 16; the left end of the first rotating shaft 24 is rotatably connected to the two support frames arranged on the upper surface of the lower support plate through a bearing.

[0040] The vertical transmission gear set includes a first vertical transmission gear 25, a second horizontal transmission gear 26, a bevel gear plate 27 and a second vertical transmission gear 17; the first vertical transmission gear 25 is coaxially fixedly connected with the first rotating shaft 24 and is arranged on the left side of the side wheel 19, the first vertical transmission gear 25 and the second horizontal transmission gear 26 are both bevel gears and mesh with each other, the second horizontal transmission gear 26 and the bevel gear plate 27 are both coaxially fixedly arranged on the second rotating shaft 39 and arranged up and down, the second vertical transmission gear 17 is a bevel gear and meshes with the bevel gear plate 27, and the second vertical transmission gear 17 is coaxially arranged at the rear end of the first drive shaft 12. In this embodiment, considering that the first drive shaft 12 and the second drive shaft 16 have a height difference, a specially designed vertical transmission gear set is used to realize power transmission to drive the rotation of the first drive shaft 12;

[0041] In the utility model, the differential gear set can convert the power input by the input shaft 18 into the power for driving the longitudinal and transverse clamping drive mechanisms through the first horizontal transmission gear 23 and the vertical transmission gear set respectively; the differential gear set first drives the longitudinal and transverse clamping drive mechanisms to move synchronously; when either the longitudinal or transverse clamping drive mechanism reaches the limit position and cannot continue to move, the differential gear set can drive a group of clamping drive mechanisms that have not reached the limit position to continue to move until both the longitudinal and transverse clamping drive mechanisms reach the limit position, thereby achieving the effect of automatic centering.

[0042] In order to further improve the smoothness of the movement of the jig during the centering process, the utility model is also provided with an adjustment plate mechanism for adjusting the position of the jig.

[0043] like Figure 2 As shown, the two transverse clamping parts 6 are provided with longitudinal adjustment plate slots 33, the longitudinal adjustment plate slots 33 are slidably connected with longitudinal adjustment plates 49, and longitudinal return springs 40 are provided at both ends of the longitudinal adjustment plate 49 and at the corresponding sides of the longitudinal adjustment plate slots 33;

[0044] like Figure 3 As shown, the two longitudinal clamping parts 9 are both provided with a transverse adjustment plate slot 34 along the left and right direction, a transverse adjustment plate 50 is slidably connected inside the transverse adjustment plate 34, and transverse return springs 41 are provided at both ends of the transverse adjustment plate 50 and on the corresponding sides of the transverse adjustment plate slot 34.

[0045] Two longitudinal return springs 40 of the same specification can ensure that the two longitudinal adjustment plates 49 are reset to the center after the fixture is released through elastic force; similarly, two transverse return springs 41 of the same specification can ensure that the two transverse adjustment plates 50 are reset to the center after the fixture is released through elastic force. The surfaces of the opposite sides of the two longitudinal adjustment plates 49 and the surfaces of the opposite sides of the two transverse adjustment plates 50 are both provided with an anti-slip layer, which can be an insulating rubber layer.

[0046] In the utility model, the working principle of the centering clamping device is as follows:

[0047] When the transverse clamping plate 4 and the longitudinal clamping plate 5 are not clamped, the operator rotates the input shaft 18 to drive the side wheel 19 to rotate clockwise, and the planetary gear 21 on the horizontal frame 20 on the side wheel 19 revolves along the central axis of the side wheel 19 and drives the first horizontal transmission gear 23 and the longitudinal sun gear 22 to rotate clockwise, and the first horizontal transmission gear 23 drives the second drive shaft 16 to rotate clockwise, and the longitudinal sun gear 22 transmits power to the first drive shaft 12 through the vertical transmission mechanism, so that the first drive shaft 12 rotates counterclockwise, and at this time, the transverse clamping plate 4 and the longitudinal clamping plate 5 perform synchronous clamping movement toward the center;

[0048] When the transverse clamping plate 4 is clamped and the longitudinal clamping plate 5 is not clamped, the first drive shaft 12 and the longitudinal sun gear 22 are in a non-rotatable state, the input shaft 18 drives the side wheel 19 to rotate, and the horizontal frame 20 integrated with the side wheel 19 drives the planetary gear 21 to revolve along the central axis of the side wheel 19. At the same time, the planetary gear 21 starts to rotate and meshes with the first horizontal transmission gear 23 to rotate clockwise, so that the second drive shaft 16 continues to rotate clockwise axially, so that the two sets of transverse clamping plates 4 can continue to perform synchronous clamping movement towards the fixture. When the longitudinal clamping plate 5 is clamped and the transverse clamping plate 4 is not clamped, the second drive shaft 16 and the first horizontal transmission gear 23 are in a non-rotatable state, and the input shaft 18 drives the side wheel 19 to rotate clockwise, and the horizontal frame 20 integrated with the side wheel 19 drives the planetary gear 21 to revolve along the central axis of the side wheel 19. At the same time, the planetary gear 21 begins to rotate and engages to drive the longitudinal sun gear 22 to rotate, and drives the first drive shaft 12 to rotate through the vertical transmission mechanism, so that the two sets of longitudinal clamping plates 5 can continue to move synchronously toward the fixture.

[0049] The adjustment plate mechanism can cooperate with the centering clamping device. After the front and rear sides or left and right sides of the fixture are clamped, the corresponding other side, that is, the left and right sides or the front and rear sides can still continue to be adjusted under the action of the horizontal clamping part 6 or the longitudinal clamping part 9 to achieve the centering effect.

[0050] Considering that the fixture needs to be locked after clamping, in the utility model, the output part of the input shaft 18 is a worm, the side wheel 19 is a worm wheel, and the outer shaft head of the input shaft 18 is provided with a first rotating handle 28.

[0051] Considering the different thicknesses of the jig or the workpiece to be cut, the cutting position may be inaccurate. Therefore, in the present invention, a lifting mechanism is also provided on the lower surface of the lower support plate 3, and the lifting mechanism drives the clamping table 1 to move in the vertical direction.

[0052] like Figure 7As shown, in the utility model, the jacking mechanism includes two groups of scissor lift structures symmetrically arranged on the left and right, each group of scissor lift structures includes an upper slide rail and a lower slide rail, and each slide rail is provided with a fixed block and a sliding block; the upper fixed block is fixed to the lower surface of the lower support plate 3, and the lower fixed block is used to be fixed to the upper surface of the workbench, and the two sliding blocks are slidably connected with the corresponding slide rails, and the upper fixed block and the lower sliding block are respectively hinged to the two ends of the first connecting rod 52, and the upper sliding block and the lower fixed block are respectively hinged to the two ends of the second connecting rod 53, and the first connecting rod 52 and the second connecting rod 53 are hinged, and the lower sliding blocks in the two groups of scissor lift structures are connected by a jacking connection part 51 provided with a screw nut 30, and the screw nut 30 is threadedly connected to the lifting threaded rod 31, and the end of the lifting threaded rod 31 is provided with a second rotating handle 29;

[0053] Workflow:

[0054] When the cutting jig needs to be replaced, first turn the first rotating handle 28 counterclockwise to loosen the transverse clamping plate 4 and the longitudinal clamping plate 5, and remove the cutting jig from the upper support surface of the clamping table 1. The longitudinal return spring 40 and the transverse return spring 41 will respectively reset the longitudinal adjustment plate 49 and the transverse adjustment plate 50 to the center. Place the jig to be replaced on the upper support surface of the clamping table 1, and turn the first rotating handle 28 clockwise;

[0055] When the cutting jig is a rectangle that is wide in front and back and narrow in left and right, the longitudinal clamping plate 5 first contacts the front and back sides of the cutting jig. Since the longitudinal clamping plate 5 moves horizontally in a synchronous manner, the cutting jig will be centered in the front and back horizontal directions under the push of the longitudinal clamping plate 5, and the jig will be clamped. At this time, the front and back horizontal directions are centered, and the first rotating handle 28 continues to be turned clockwise. The differential transmission mechanism begins to intervene, and the second drive shaft 16 and the first horizontal transmission gear 23 are in a non-rotatable state. The input shaft 18 drives the side wheel 19 to rotate, and the horizontal frame 20 integrated with the side wheel 19 drives the planetary gear 21 to revolve along the central axis of the side wheel 19. At the same time, the planetary gear 21 begins to rotate and meshes to drive the longitudinal sun gear 22 to rotate, and drives the first drive shaft 12 to rotate through the vertical transmission mechanism, so that the two sets of horizontal clamping plates 4 can continue to move synchronously toward the jig. At this time, under the push of the transverse clamping plate 4, the front and rear sides of the cutting jig continue to slide left and right on the longitudinal clamping part 9 using the transverse adjustment plate 50. When the transverse clamping plate 4 is clamped, the centering function is completed. At this time, the input shaft 18 no longer rotates, and the worm at the end of the input shaft 18 locks the turbine of the side wheel 19 to prevent the clamping block from loosening, thereby completing the clamping function of the equipment.

[0056] When the cutting jig is a rectangle that is narrow in front and back and wide in left and right, the transverse clamping plate 4 first contacts the left and right sides of the cutting jig. Since the transverse clamping plate 4 is synchronously moving horizontally left and right, the cutting jig will be centered in the horizontal direction of left and right first, and the jig will be clamped. At this time, the left and right horizontal directions are centered, and the first rotating handle 28 is rotated clockwise. The differential transmission mechanism begins to intervene. The first drive shaft 12 and the longitudinal sun gear 22 are in a non-rotatable state. The input shaft 18 drives the side wheel 19 to rotate. The horizontal frame 20 integrated with the side wheel 19 drives the planetary gear 21 to revolve along the center axis of the side wheel 19. At the same time, the planetary gear 21 begins to rotate and meshes to drive the first horizontal transmission gear 23 to rotate clockwise, so that the second drive shaft 16 rotates clockwise axially, so that the two sets of longitudinal clamping plates 5 can continue to move synchronously toward the jig. At this time, under the push of the longitudinal clamping plate 5, the left and right sides of the cutting jig continue to slide forward and backward on the transverse clamping plate 4 using the longitudinal adjustment plate 49. When the longitudinal clamping plate 4 is clamped, the centering function is completed. At this time, the input shaft 18 no longer rotates, and the worm gear at the end of the input shaft 18 locks the turbine of the side wheel 19, completing the clamping function of the equipment.

[0057] When the clamping table 1 needs to be raised or lowered, the second rotating handle 29 is rotated clockwise or counterclockwise, and the lifting mechanism will rise or fall to make the clamping table move upward or downward in the vertical direction to complete the lifting function of the equipment. The lifting mechanism is a prior art and its principle will not be repeated here.

Claims

1. A universal fixture clamping device, comprising a clamping table, characterized in that: The clamping table is a rectangular structure with a hollow cavity and four side plates with horizontal through grooves. The top plate and bottom plate of the clamping table are respectively an upper support plate and a lower support plate; a centering clamping device is provided on the upper support plate, and the centering clamping device includes a differential drive mechanism, two groups of transverse clamping plates moving in the left and right directions, and two groups of longitudinal clamping plates moving in the front and back directions; the two groups of transverse clamping plates are driven by the transverse clamping drive mechanism and move synchronously toward or in opposite directions; the two groups of longitudinal clamping plates are driven by the longitudinal clamping drive mechanism and move synchronously toward or in opposite directions; the differential transmission mechanism drives the transverse clamping drive mechanism and the longitudinal clamping drive mechanism to move synchronously or asynchronously; the two groups of longitudinal clamping plates are both slidably connected with the two groups of transverse clamping plates; the transverse clamping drive mechanism, the longitudinal clamping drive mechanism and the differential transmission mechanism are all arranged in the hollow cavity of the clamping table.

2. A universal fixture clamping device according to claim 1, characterized in that: The two sets of transverse clamping plates have the same structure, and both include a transverse clamping portion arranged on the upper surface of the upper support plate, a transverse sliding portion on the outer side of the front and rear surfaces of the upper support plate, and a transverse connecting portion arranged in the hollow cavity of the clamping platform along the front and rear directions; the transverse clamping portion, the transverse connecting portion and the front and rear transverse sliding portions form a square-shaped structure; the two transverse clamping portions are both provided with longitudinal clamping plate sliding grooves along the front and rear directions; The two groups of longitudinal clamping plates have the same structure, both including a longitudinal clamping portion arranged on the upper surface of the upper support plate and slidably connected to the longitudinal clamping plate slide groove, a longitudinal sliding portion on the outer side of the left and right surfaces of the upper support plate, and a longitudinal connecting portion arranged in the hollow cavity of the clamping platform along the left and right directions.

3. A universal fixture clamping device according to claim 2, characterized in that: The front and rear side plate surfaces of the clamping table in contact with the transverse sliding part are horizontally provided with left and right sliding rails, and the corresponding positions of the transverse sliding part are provided with left and right sliding grooves matched with the left and right sliding rails; the left and right side plate surfaces of the clamping table in contact with the longitudinal sliding part are horizontally provided with front and rear sliding rails, and the corresponding positions of the longitudinal sliding part are provided with front and rear sliding grooves matched with the front and rear sliding rails.

4. A universal fixture clamping device according to claim 2, characterized in that: The longitudinal clamping plate slide groove adopts a rectangular through groove, and the transverse clamping plate and the longitudinal clamping plate are both made of metal material.

5. A universal fixture clamping device according to claim 2, characterized in that: The transverse clamping drive mechanism includes a transverse rack transmission group and a first drive shaft provided with a first drive gear. The transverse rack transmission group consists of two upper and lower racks. The upper and lower ends of the first drive gear are respectively meshed with the upper and lower racks; the outer ends of the upper and lower racks are respectively connected to the transverse connecting parts of the two transverse clamping plates; the first drive shaft is fixed to the support plate under the clamping platform through a bearing and a bearing seat.

6. A universal fixture clamping device according to claim 5, characterized in that: The longitudinal clamping drive mechanism includes a longitudinal rack transmission group and a second drive shaft provided with a second drive gear. The longitudinal rack transmission group consists of two upper and lower racks. The upper and lower ends of the second drive gear are respectively meshed with the upper and lower racks; the outer ends of the upper and lower racks are respectively connected to the longitudinal connecting parts of the two longitudinal clamping plates; the second drive shaft is fixed to the support plate under the clamping table through bearings and bearing seats.

7. A universal fixture clamping device according to claim 6, characterized in that: The differential transmission mechanism includes a differential gear set, a first horizontal transmission gear and a vertical transmission gear set; the differential gear set includes an input shaft, a side wheel, a planetary gear and a longitudinal sun gear; the input shaft is rotatably connected to the support plate on the clamping table; the side wheel is mounted on the first rotating shaft through a bearing sleeve, the longitudinal sun gear is coaxially fixedly connected to the first rotating shaft and is arranged on the right side of the side wheel, and a horizontal frame is also vertically arranged on the end face of the side wheel, the planetary gear is rotatably connected to the horizontal frame through a vertical rotating shaft, the longitudinal sun gear and the planetary gear both adopt bevel gears and mesh with each other; the side wheel adopts a worm gear, and a worm is arranged at the end of the input shaft; the first horizontal transmission gear adopts a bevel gear and meshes with the planetary gear, and the first horizontal transmission gear synchronously drives the second drive shaft to rotate; the first rotating shaft is rotatably connected to the lower support plate, and the first rotating shaft drives the first drive shaft to rotate synchronously through the vertical transmission gear set.

8. A universal fixture clamping device according to claim 7, characterized in that: The first horizontal transmission gear is coaxially arranged at the left end of the second driving shaft; the vertical transmission gear group includes a first vertical transmission gear, a second horizontal transmission gear, a bevel gear plate and a second vertical transmission gear; the first vertical transmission gear is coaxially fixedly connected to the first rotating shaft and is arranged on the left side of the side wheel, the first vertical transmission gear and the second horizontal transmission gear both adopt bevel gears and mesh with each other, the second horizontal transmission gear and the bevel gear plate are coaxially fixedly arranged on the second rotating shaft and arranged up and down, the second vertical transmission gear adopts a bevel gear and meshes with the bevel gear plate, and the second vertical transmission gear is coaxially arranged at the rear end of the first driving shaft.

9. A universal fixture clamping device according to claim 2, characterized in that: The two transverse clamping parts are both provided with a longitudinal adjustment plate slide groove, a longitudinal adjustment plate is slidably connected in the longitudinal adjustment plate slide groove, and longitudinal return springs are provided at both ends of the longitudinal adjustment plate and on the corresponding sides of the longitudinal adjustment plate slide groove; transverse adjustment plate slide grooves are both provided on the two longitudinal clamping parts along the left and right directions, a transverse adjustment plate is slidably connected in the transverse adjustment plate, and transverse return springs are provided at both ends of the transverse adjustment plate and on the corresponding sides of the transverse adjustment plate slide groove.

10. The universal fixture clamping device according to claim 1, characterized in that: The lower surface of the lower support plate is provided with a jacking mechanism, and the jacking mechanism includes two groups of scissor lift structures symmetrically arranged on the left and right, each group of scissor lift structures includes an upper slide rail and a lower slide rail, and each slide rail is provided with a fixed block and a sliding block; the upper fixed block is fixed to the lower surface of the lower support plate, and the lower fixed block is used to be fixed to the upper surface of the workbench, and the two sliding blocks are respectively slidably connected to the corresponding slide rails, the upper fixed block and the lower sliding block are respectively hinged to the two ends of the first connecting rod, the upper sliding block and the lower fixed block are respectively hinged to the two ends of the second connecting rod, the first connecting rod is hinged to the middle part of the second connecting rod, and the lower sliding blocks in the two groups of scissor lift structures are connected through a jacking connection part provided with a screw nut, the screw nut is threadedly connected to the lifting threaded rod, and the end of the lifting threaded rod is provided with a second rotating handle.

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