Pneumatic clamping device and machine tool

Abstract

The utility model discloses a pneumatic clamping device and a machine tool, the pneumatic clamping device comprises a transmission assembly, a clamping assembly and a pneumatic clamping source assembly providing clamping power for the clamping assembly, the transmission assembly is hollow, the clamping assembly is rotatably arranged on the transmission assembly in a penetrating mode and can be led out from the other end of the transmission assembly, and the pneumatic clamping source assembly is used for providing clamping power for the clamping assembly. A gear train is arranged in the transmission assembly, and the pneumatic clamping source assembly is installed on the outer side of the transmission assembly. The pneumatic clamping source assembly has the advantages that the clamping assembly is arranged on the transmission assembly in a penetrating mode and can be led out from the other end of the transmission assembly, and pneumatic power is transmitted to the clamping assembly which can rotate relatively through the transmission assembly after being output from the pneumatic clamping source assembly. According to the technical scheme, the cost is greatly reduced, the size is small, the structure is simple, the service life is long, and safety and environmental protection are achieved.

Description

Technical Field

[0001] The utility model relates to the field of clamps and fixtures, in particular to a pneumatic clamping device and a machine tool. Background Art

[0002] The technical problem of achieving controllable relative motion between an object on a rotating object and a rotating object has been bothering people for many years. For example, in the field of automation equipment and machine tool equipment, it is often necessary to clamp the product and then rotate it in order to achieve processing. The existing machine tool equipment adopts hydraulic or pneumatic forms to achieve this. The hydraulic method is composed of a hydraulic chuck, a rotary hydraulic cylinder, and a hydraulic station. The hydraulic station outputs hydraulic oil through the rotary hydraulic cylinder to achieve telescopic action, thereby achieving relative movement of the hydraulic chuck jaws relative to the chuck. This method has a complex structure, large volume, high cost, and short life, and the hydraulic oil used has environmental and safety risks. The pneumatic method requires external static gas to be input into the rotating object. At this time, a sealing device is required between the static and moving objects to ensure that the gas does not leak, which leads to sealing problems and friction problems of the sealing device, and then leads to problems of life and speed limit. In some automation equipment fields, a power supply slip ring is used to achieve the transmission of electrical energy and information, thereby achieving controllable relative motion between an object on a rotating object and a rotating object, but this also causes technical problems such as slip ring wear and complex volume and high cost.

[0003] Therefore, after intensive research, the inventor has now proposed a technical solution for a pneumatic clamping device, and at the same time proposed a feasible technology to solve the technical problem of controllable relative motion between objects on a rotating object and the rotating object, such as realizing axial relative movement, radial relative movement, radial relative rotation and other movements on the rotating object. This technology can also be expanded to other technical fields. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the utility model discloses a pneumatic clamping device, comprising:

[0005] A transmission assembly, the transmission assembly comprising a hollow mounting cavity, wherein a gear train is disposed in the mounting cavity;

[0006] The clamping assembly comprises a disc body, a clamping claw and a clamping claw driving structure, wherein the disc body is arranged on one side end surface of the installation cavity, the clamping claw is arranged on the disc body, the driving structure is arranged in the disc body, and the driving structure is respectively connected to the clamping claw and the gear system in the installation cavity;

[0007] A pneumatic clamping source component is arranged on the outside of the transmission component. The pneumatic clamping source component is gas-driven and can provide a power source for the gear train in the installation cavity.

[0008] Preferably, the transmission assembly includes a first mounting base plate, a first housing, a waterproof plate, na first gears, a first gear mounting frame, a second gear, ma third gears, a fourth gear, and a first pneumatic clamping source shield;

[0009] The first shell is fixed to the first mounting base plate to form a hollow first mounting cavity, the first shell is provided with a first notch, the pneumatic clamping source component is inserted into the first notch, the inner side of the fourth gear is provided with a transmission tooth, and the outer side is provided with a first ratchet, the pneumatic clamping source component drives the first ratchet of the fourth gear, the first pneumatic clamping source shield is fixed to the first mounting base plate and is located on the outer side of the first shell, the first pneumatic clamping source shield is provided with a plurality of first observation windows, the pneumatic clamping source component is arranged in the first pneumatic clamping source shield, the inner side of the first shell is provided with a first shell transmission tooth, and the waterproof plate is fixed to an outer end surface of the first shell;

[0010] The na first gears, the first gear mounting frame, the second gear, the ma third gears, and the fourth gear are all arranged in the first mounting cavity of the first housing and placed between the first mounting base plate and the waterproof plate, and the fourth gear is arranged above the transmission gear of the first housing;

[0011] The na first gears are all meshed with the transmission teeth of the first housing for transmission. The first gear mounting frame is hollow. The upper and lower surfaces of the first gear mounting frame are respectively provided with na first cylindrical bosses and ma second cylindrical bosses. The na first gears are respectively rotatably arranged on the na first cylindrical bosses one by one. The na first gears are all meshed with the transmission teeth of the first housing for transmission. The second gear is hollow. The second gear is fixedly connected to the clamping assembly. Ma third gears are respectively rotatably arranged on the ma second cylindrical bosses one by one. Transmission teeth are arranged on the inner and outer sides of the fourth gear. The fourth gear is meshed with the ma third gears for transmission. The fourth gear is rotatably connected to the first housing. The third gear is transmission-connected to the clamping assembly. The transmission wheel of the first housing and the transmission teeth in the fourth gear have the same tooth number modulus. The na first gears and the ma third gears have the same tooth number modulus. The na is an integer greater than or equal to 2, and the ma is an integer greater than or equal to 2.

[0012] Preferably, the transmission assembly includes a second clamping source shield and a second mounting base plate, all of which are hollow, a first spur tooth, nb second spur teeth, nb planetary spur tooth mounting columns, twice nb spur tooth planetary sleeves, a third spur tooth, a fourth spur tooth, a fourth spur tooth input plate, a fourth spur tooth input ratchet, nb fifth spur teeth, a sixth spur tooth, a spur tooth output shaft, a planetary mounting upper plate, a planetary mounting lower plate, and a fourth spur tooth pressure plate;

[0013] The second mounting base plate, the first spur tooth, the fourth spur tooth, the fourth spur tooth input plate, and the fourth spur tooth input ratchet are arranged in sequence from bottom to top, the fourth spur tooth pressure plate is fixed to one end of the first spur tooth, and the fourth spur tooth recessed groove is arranged on the inner side of the end face, and the fourth spur tooth is rotatably arranged in the fourth spur tooth recessed groove, the first spur tooth is fixedly connected to the second mounting base plate, the first spur tooth is rotatably connected to the fourth spur tooth, the fourth spur tooth is fixedly connected to the fourth spur tooth input plate, and the fourth spur tooth input ratchet is fixed on the fourth spur tooth input plate, the second clamping source shield is also fixed to the second mounting base plate, and a plurality of second observation windows are arranged on the second clamping source shield, the spur tooth output shaft is provided with a plurality of slideways DK, the first transmission thread EK is arranged on the outer side of the spur tooth output shaft, and the mounting connection thread FK is arranged on the inner side, and the planetary mounting lower plate is arranged on the second mounting base plate, The nb planetary spur gear mounting columns are fixed on the planetary mounting lower plate, and the upper and lower spur gear planetary sleeves are rotatably provided on each planetary spur gear mounting column, and the second spur gear and the fifth spur gear are respectively fixed on the outer sides of the upper and lower spur gear planetary sleeves, the nb second spur gears are all meshed with the first spur gears for transmission, and are all meshed with the third spur gears for transmission, the nb fifth spur gears are all meshed with the fourth spur gears for transmission, and are all meshed with the sixth spur gears for transmission, the other end of each planetary spur gear mounting column is fixed on the planetary mounting upper plate, the third spur gear is rotatably connected with the sixth spur gear, a second transmission thread GK is provided on the inner side of the sixth spur gear, the first transmission thread EK is transmission-connected with the second transmission thread GK, and a second ratchet tooth is provided on the outer side of the fourth spur gear input ratchet, nb is an integer greater than or equal to 2, and pb is an integer greater than or equal to 2.

[0014] Preferably, the transmission assembly includes a third mounting base plate, a third housing, a bevel gear housing pressure ring, a first bevel gear, nc second bevel gears, nc second bevel gear mounting columns, a bevel gear planetary sleeve, a third bevel gear, a fourth bevel gear, nc fifth bevel gears, a sixth bevel gear, a bevel gear input gear, a fourth bevel gear output shaft, pc bevel gear transition gears, a bevel gear output shaft, and a bevel gear output nut, a bevel gear output screw, a bevel gear screw guide plate, an output bevel gear, and a third pneumatic clamping source shield; a third mounting cavity is provided inside the third housing, and the first bevel gear, nc second bevel gears, nc second bevel gear mounting columns, a bevel gear planetary sleeve, a third bevel gear, a fourth bevel gear, nc fifth bevel gears, a sixth bevel gear, a bevel gear input gear, a fourth bevel gear output shaft, pc bevel gear transition gears, a bevel gear output shaft and an output bevel gear are all provided in the third mounting cavity, and the third housing is provided on the third mounting base plate Above, the sixth bevel gear is arranged on the outer side of the first bevel gear, the nc second bevel gears are arranged on the upper side of the first bevel gear, the nc fifth bevel gears are arranged on the outer side of the nc second bevel gears, the nc fifth bevel gears are located above the sixth bevel gear, the third bevel gear is arranged on the upper side of the nc second bevel gears, the fourth bevel gear is arranged on the outer side of the third bevel gear, the fourth bevel gear is located above the nc fifth bevel gears, the bevel gear input gear is arranged on the outer side of the sixth bevel gear, the third ratchet gear is arranged on the outer side of the bevel gear input gear, the pneumatic clamping source assembly drives the third ratchet gear of the bevel gear input gear to rotate, a fourth bevel gear output shaft is arranged on the upper side of the fourth bevel gear, the pc bevel gear transition teeth and the bevel gear output shaft are arranged on the inner side of the fourth bevel gear output shaft, the output bevel gear is fixed to one end of the bevel gear output shaft, and a transmission gear is arranged on the outer side of the output bevel gear;

[0015] The third housing is provided with a third notch, a pneumatic clamping source is penetrated through the third notch, the third pneumatic clamping source shield is fixedly connected to the third mounting base plate and is located outside the third housing, the pneumatic clamping source is arranged in the third pneumatic clamping source shield, the third bevel gear is fixedly connected to the clamping assembly, the bevel gear screw guide plate is provided with a guide groove, and the bevel gear screw guide plate is slidably connected to the clamping assembly through the guide groove;

[0016] The third housing and the third pneumatic clamping source shield are fixed to the third mounting base plate, the bevel gear housing pressure ring is fixed to one end face of the third housing, the first bevel gear is fixedly connected to the third housing, nc second bevel gears are meshed with the first bevel gear for transmission, nc second bevel gears are rotatably connected to nc second bevel gear mounting posts one by one, and nc second bevel gear mounting posts are fixed to the inner side of the bevel gear planetary sleeve,

[0017] The bevel gear planetary sleeve is rotatably connected to the third outer shell, the third bevel gear is meshed with nc of the second bevel gears for transmission, the fourth bevel gear is meshed with the nc fifth bevel gears for transmission, nc of the fifth bevel gears are rotatably connected one-to-one with nc of the second bevel gear mounting columns and are located on the outside of the second bevel gear, nc of the fifth bevel gears are meshed with the sixth bevel gear for transmission, the sixth bevel gear is fixedly connected to the bevel gear input gear, the bevel gear input gear is rotatably connected to the third outer shell, the fourth bevel gear is fixedly connected to the fourth bevel gear output shaft, the fourth bevel gear output shaft is provided with internal transmission teeth, the fourth bevel gear output shaft is internally meshed with pc of the bevel gear transition teeth, the bevel gear output shaft is provided with transmission teeth, the bevel gear output shaft is externally meshed with pc of the bevel gear transition teeth, nc is an integer greater than or equal to 2, and pc is an integer greater than or equal to 2.

[0018] Preferably, the clamping assembly comprises a first chuck body, a first clamping jaw, a wire disc, and a pressure plate;

[0019] The first chuck body is hollow, and a first slide groove is arranged on the first chuck body. An inner concave space is arranged on one end surface of the first chuck body, and the inner concave space is connected with the first slide groove. A first step shaft is arranged in the middle of the inner concave space of the first chuck body, and a transmission tooth is arranged on the other end surface of the wire disc, and the transmission tooth of the wire disc is transmission-connected with the transmission assembly;

[0020] A first clamping jaw is slidably arranged in each of the first sliding grooves, a plurality of tooth grooves are arranged on one end face of the first clamping jaw, a wire reel is arranged in the concave space, the wire reel is hollow and rotatably sleeved on the first step shaft of the first chuck body, a spiral groove is arranged on one end face of the wire reel, the pressure plate is arranged on the outside of the concave space and fixedly connected to the first chuck body, the spiral groove cooperates with the tooth grooves arranged on one end face of the first clamping jaw for transmission, and ja is an integer greater than or equal to 2.

[0021] Preferably, the clamping assembly comprises a second chuck body, a connecting nut, a connecting nut pressure plate, a movable wedge, a second chuck connecting shaft and kc second clamping jaws, all of which are hollow;

[0022] The second chuck body is hollow and has a stepped shaft on the outside. One end surface of the second chuck body is provided with kc second sliding grooves. Each second clamping jaw can be slidably arranged on the second chuck body through the second sliding groove. The second clamping jaw is provided with a wedge surface. The movable wedge block is provided with a wedge groove. The wedge surface and the wedge groove are slidably connected. One end surface of the second chuck connecting shaft is provided with a countersunk groove, and a plurality of notched sliding grooves are provided on the side. The third spur tooth of the transmission assembly is fixedly connected to the second chuck connecting shaft through the countersunk groove. The output shaft is slidably connected to the second chuck connecting shaft up and down through the sliding cooperation of the slideway DK and the notched slide groove. The second chuck connecting shaft is provided with an end face on the countersunk groove side and is fixedly connected to the step shaft of the second chuck body. The movable wedge block is slidably connected to the second chuck body. The connecting nut pressure plate is fixed to one end face of the movable wedge block. The connecting nut is rotatably arranged between the movable wedge block and the connecting nut pressure plate. The second chuck connecting shaft is passed through the transmission assembly and can be led out from the other side thereof. kc is an integer greater than or equal to 2.

[0023] Preferably, the clamping assembly comprises a third chuck body, jb third clamping jaws, jb third movable screw nuts, jb third movable screws, jb pairs of third bearings, jb third bearing mounting blocks, jb clamping jaw movable spur teeth, and jb movable spur tooth pressure blocks;

[0024] The third chuck body is hollow, a third step shaft is arranged at one end of the third chuck body, and pb third through slots are arranged at the root of the third step shaft, the spur gear of the transmission assembly can be rotatably arranged in the third through slot, the third bevel gear of the transmission assembly is fixed on the third step shaft, the fourth bevel gear can be rotatably sleeved on the third step shaft, the third step shaft is passed through the transmission assembly, and can be led out from the other side thereof;

[0025] The third movable jaw is provided with a movable frame, and the movable frame is provided with a movable frame.

[0026] Preferably, the pneumatic clamping source assembly includes a first left cylinder, a first right cylinder, a first left cylinder mounting plate, a first right cylinder mounting plate, a first left connecting block, a first right connecting block, a first left ratchet disc, a first right ratchet disc, a first left driving shaft, a first right driving shaft, a first pawl rotating shaft, a first swinging pawl, a first left sealing plate, and a first right sealing plate;

[0027] The first left ratchet disc and the first right ratchet disc are hollow, the first left ratchet disc is provided with a first left radial protrusion, the first right ratchet disc is provided with a first right radial protrusion, the first left ratchet disc inner side is provided with a first left disc recessed groove, the first left disc recessed groove is provided with a first left drive shaft mounting hole, the first right ratchet disc inner side is provided with a first right disc recessed groove, a transverse first right through-active groove is provided in the first right disc recessed groove, the first left ratchet disc and the first right ratchet disc inner side are further provided with a first pawl rotating shaft mounting hole at a coaxial position up and down on the inner sides of the first left ratchet disc and the first right ratchet disc, the first swing pawl is provided with a pawl rotating shaft mounting hole, a first left pawl tooth is provided on the left side of one end of the first swing pawl, and a first right pawl tooth is provided on the right side, the first swing pawl is also provided with a longitudinal first left through-active groove, the longitudinal first left through-active groove is coaxial with the center point of the first right through-active groove and is arranged at a certain non-parallel angle, and the first swing pawl is arranged in the first left disc recessed groove and the first right disc recessed groove;

[0028] The first left cylinder is fixedly connected to the first left cylinder mounting plate, the first right cylinder is fixedly connected to the first right cylinder mounting plate, the first left cylinder mounting plate is rotatably connected to the first mounting base plate, the first right cylinder mounting plate is rotatably connected to the first mounting base plate, the first left connecting block is fixed to the output end of the first left cylinder, the first right connecting block is fixed to the output end of the first right cylinder, the first left connecting block is rotatably connected to the first left driving shaft, the first right driving shaft is fixed to the first right connecting block, the first left driving shaft is fixed to the first left driving shaft mounting hole, the first right driving shaft is penetrated through the first transverse right through-active groove, and one end of the first right driving shaft is arranged in the first longitudinal left through-active groove;

[0029] The first left ratchet disc is coaxially fixedly connected with the first right ratchet disc, two ends of the first pawl shaft are respectively fixed in the first pawl shaft mounting holes of the first left ratchet disc and the first right ratchet disc, the first swing pawl is rotatably arranged on the first pawl shaft, the first left sealing plate is fixedly connected with the first left ratchet disc and the first right ratchet disc, and the first right sealing plate is fixedly connected with the first left ratchet disc and the first right ratchet disc;

[0030] The first left ratchet disc and the first right ratchet disc are inserted into the first notch, the first swing pawl can drive the first ratchet tooth on the outer side of the fourth gear, and the first housing is rotatably connected to the first left ratchet disc and the first right ratchet disc.

[0031] Preferably, the pneumatic clamping source assembly includes a second left cylinder, a second right cylinder, a second left cylinder mounting plate, a second right cylinder mounting plate, a second left connecting block, a second right connecting block, a second left ratchet disc, a second right ratchet disc, a second left drive shaft, a second right drive shaft, a second pawl rotating shaft, a second swing pawl, a second left cylinder fixing plate, and a second right cylinder fixing plate;

[0032] The second left ratchet disc and the second right ratchet disc are hollow, the second left ratchet disc is provided with a second left radial protrusion, the second right ratchet disc is provided with a second right radial protrusion, the second left radial protrusion provided by the second left ratchet disc is provided with a second left driving shaft mounting hole, the second right ratchet disc inner side is provided with a second right disc sunken groove, the second right radial protrusion is provided with a transverse second right through-active groove, the second left ratchet disc and the second right ratchet disc inner side are also provided with a second pawl rotating shaft mounting hole at the upper and lower coaxial positions, the second swing pawl is provided with a pawl rotating shaft mounting hole, the second swing pawl is provided with a second left pawl tooth on the left side of one end of the second swing pawl, and a second right pawl tooth on the right side, the second swing pawl is also provided with a longitudinal second left through-active groove, the longitudinal second left through-active groove is coaxial with the center point of the second right through-active groove and is arranged at a certain non-parallel angle, and the second swing pawl is arranged in the second right disc sunken groove;

[0033] The second left cylinder is fixedly connected to the second left cylinder mounting plate, the second right cylinder is fixedly connected to the second right cylinder mounting plate, the second left cylinder mounting plate is rotatably connected to the second left cylinder fixing plate, the second right cylinder mounting plate is rotatably connected to the second right cylinder fixing plate, the second left cylinder fixing plate is rotatably connected to the second mounting base plate, the second right cylinder fixing plate is rotatably connected to the second mounting base plate, the second left connecting block is fixed to the output end of the second left cylinder, the second right connecting block is fixed to the output end of the second right cylinder, the second left connecting block is fixedly connected to the second left driving shaft, the second right driving shaft is fixed to the second right connecting block, the second left driving shaft is rotatably arranged in the second left driving shaft mounting hole, the second right driving shaft is penetrated in the second right transverse through-active groove, and one end thereof is arranged in the second left longitudinal through-active groove;

[0034] The second left ratchet plate is coaxially fixedly connected with the second right ratchet plate, and both ends of the second pawl shaft are rotatably arranged in the second pawl shaft mounting holes of the second left ratchet plate and the second right ratchet plate respectively, and the second swing pawl is fixedly connected with the second pawl shaft.

[0035] Preferably, the pneumatic clamping source assembly includes a third left cylinder, a third right cylinder, a third left cylinder mounting plate, a third right cylinder mounting plate, a third left cylinder connecting block, a third right cylinder connecting block, a third left connecting shaft, a third right connecting shaft, a third ratchet plate, a third pawl cylinder, a third movable pawl, a third left sealing plate, and a third right sealing plate;

[0036] The third ratchet disc is provided with a third radial protrusion, the third radial protrusion is provided with a through third pawl sliding groove, and one end of the third movable pawl is provided with a third pawl tooth;

[0037] The third left cylinder mounting plate is rotatably connected to the third outer shell, the third right cylinder mounting plate is rotatably connected to the third outer shell, the third ratchet disc is inserted into the third notch and is rotatably connected to the third outer shell; the third left cylinder is fixedly connected to the third left cylinder mounting plate, the third right cylinder is fixedly connected to the third right cylinder mounting plate, the third left cylinder output end is fixed with the third left cylinder connecting block, the third right cylinder output end is fixed with the third right cylinder connecting block, the third left cylinder connecting block is connected to the third The third left connecting shaft is rotatably connected, the third right cylinder connecting block is rotatably connected to the third right connecting shaft, the third left connecting shaft is fixed on the third ratchet disk, the third right connecting shaft is fixed on the third ratchet disk, the third pawl cylinder is fixed on the third ratchet disk, the third movable pawl is fixed on the output end of the third pawl cylinder, the third movable pawl is slidably set in the third pawl slot, and the third pawl tooth can be connected or disconnected with the third ratchet tooth under the control of the third pawl cylinder, thereby realizing power transmission or disconnection.

[0038] A machine tool comprises a machine body and the pneumatic clamping device described above.

[0039] A clamping method in the pneumatic clamping device is as follows: its control method is that when it is necessary to output counterclockwise rotation motion, the first left cylinder extends, and then the first right cylinder retracts. At this time, the first left cylinder will first push the first swing pawl to swing. The swing of the first swing pawl makes the first right ratchet tooth approach the center of the circle and press on the first ratchet tooth and push it to move together. During the return stroke, the first left cylinder is in a state of no ventilation or low-pressure air, and the first right cylinder extends to push the first left ratchet disk and the first right ratchet disk to move clockwise. The first swing pawl lags behind the movement of the first left ratchet disk and the first right ratchet disk, so that no clockwise force is generated on the first ratchet tooth. When the object is clamped counterclockwise, that is, the output position of the first left cylinder is continuously detected, the first right cylinder can output a retraction action, and the first swing pawl can output double torque at this time. The opposite control can be performed when outputting clockwise rotation motion.

[0040] The cylinder includes but is not limited to a cylinder, a hydraulic cylinder, a gas-liquid booster cylinder and other mechanisms or elements that output linear motion.

[0041] Compared with the prior art, the pneumatic clamping device of the utility model has the following advantages: a clamping component is passed through the transmission component and can be led out from the other end thereof; when power is output from the pneumatic clamping source component, it is transmitted to the relatively rotatable clamping component through the transmission component, so that the clamping component can realize the clamping action in any state such as rotation or stillness, which greatly reduces the cost, has a small size, a simple structure, a long service life, and is safe and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0043] Figure 1 is a stereogram of Example 1;

[0044] Figure 2 is a cross-sectional view of Example 1;

[0045] Figure 3 is a cross-sectional view of Example 2;

[0046] Figure 4 is a cross-sectional view of Example 3;

[0047] Figure 5 It is an exploded view of the transmission assembly of Example 1;

[0048] Figure 6It is an exploded view of the transmission assembly of Example 2;

[0049] Figure 7 It is an exploded view of the transmission assembly of Example 3;

[0050] Figure 8 It is an exploded view of the clamping assembly of Example 1;

[0051] Fig. 9 It is an exploded view of the clamping assembly of Example 2;

[0052] Fig.10 It is an exploded view of the clamping assembly of Example 3;

[0053] Fig.11 An exploded view of the pneumatic clamping source assembly of Example 1;

[0054] Fig.12 An exploded view of the pneumatic clamping source assembly of Example 2;

[0055] Fig.13 This is an exploded view of the pneumatic clamping source assembly of Example 3. DETAILED DESCRIPTION

[0056] The following is a detailed description of the embodiments of the present invention, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer definition of the protection scope of the present invention. The accompanying drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementations and the advantages of the present invention.

[0057] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0058] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0059] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0060] In the embodiments of the present application, refer to the attached Figure 1 , 2 3. A pneumatic clamping device comprises a transmission component 01, a clamping component 02 and a pneumatic clamping source component 03 for providing clamping power for the clamping component.

[0061] The transmission component 01 is hollow, and the clamping component 02 can be rotatably inserted into the transmission component 01 and can be led out from the other end thereof. A gear train is arranged inside the transmission component 01, and a pneumatic clamping source component 03 is installed outside the transmission component 01. When the power is output from the pneumatic clamping source component 03, it is transmitted to the relatively rotatable clamping component 02 through the gear train of the transmission component 01, so that the clamping component 02 can realize the clamping action in any state such as rotation or stillness.

[0062] See attached Figure 2 , 5 , the transmission assembly 11 includes a first mounting base plate 1101, a first housing 1102, a waterproof plate 1103, na first gears 1104, a first gear mounting frame 1105, a second gear 1106, ma third gears 1107, a fourth gear 1108, and a first pneumatic clamping source shield 1109;

[0063] The first housing 1102 is fixed on the first mounting base plate 1101 to form a hollow first mounting cavity AK, the first housing 1102 is provided with a first notch T104, the pneumatic clamping source assembly 13 is inserted into the first notch T104, the inner side of the fourth gear 1108 is provided with a transmission tooth, and the outer side is provided with a first ratchet T105, the pneumatic clamping source assembly 13 drives the first ratchet T105 of the fourth gear 1108, the first pneumatic clamping source shield 1109 is fixed to the first mounting base plate 1101 and is located outside the first housing 1102, a plurality of first observation windows BK are provided on the first pneumatic clamping source shield 1109, the pneumatic clamping source assembly 13 is arranged in the first pneumatic clamping source shield 1109, the inner side of the first housing 1102 is provided with a first housing transmission tooth T103, and the waterproof plate 1103 is fixed to an outer end surface of the first housing 1102;

[0064] Na first gears 1104, a first gear mounting frame 1105, a second gear 1106, ma third gears 1107, and a fourth gear 1108 are all arranged in the first mounting cavity AK of the first housing 1102 and placed between the first mounting base plate 1101 and the waterproof plate 1103. The fourth gear 1108 is arranged above the transmission gear T103 of the first housing;

[0065] The na first gears 1004 are all meshed with the first housing transmission teeth T103 for transmission, the first gear mounting frame 1105 is hollow, and the upper and lower surfaces of the first gear mounting frame 1105 are respectively provided with na first cylindrical bosses T101 and ma second cylindrical bosses T102, the na first gears 1104 are respectively rotatably arranged on the na first cylindrical bosses T101 one by one, the na first gears 1104 are all meshed with the first housing transmission teeth T103 for transmission, the second gear 1106 is hollow, the second gear 1105 is fixedly connected to the clamping assembly 12, and the ma third gears 1107 are respectively rotatably arranged on the na first cylindrical bosses T101 one by one. The fourth gear 1108 is dynamically arranged on ma second cylindrical bosses T102, transmission teeth are arranged inside and outside the fourth gear 1108, the fourth gear 1108 is meshed with ma third gears 1107 for transmission, the fourth gear 1108 is rotatably connected to the first housing 1102, the transmission wheel T103 of the first housing 1102 and the transmission teeth in the fourth gear 1108 have the same tooth number and modulus, the na first gears 1104 and ma third gears 1107 have the same tooth number and modulus, the second gear 1106 and the transmission tooth H124 of the wire reel 1203 have the same tooth number and modulus, na is an integer greater than or equal to 2, and ma is an integer greater than or equal to 2.

[0066] See attached Figure 8 , Embodiment 1, the clamping assembly 12 includes a first chuck body 1201, a first clamping jaw 1202, a wire disc 1203, and a pressing plate 1204;

[0067] The first chuck body 1201 is hollow, and a first slide groove H121 is arranged on the first chuck body 1201. A concave space H122 is arranged on one end surface of the first chuck body 1201, and the concave space H122 is connected to the first slide groove H121. A first step shaft H123 is arranged in the middle of the concave space of the first chuck body 1201, and a transmission tooth H124 is arranged on the other end surface of the wire disc 1203.

[0068] A first clamping jaw 1202 is slidably disposed in each first sliding groove H121, a plurality of tooth grooves H125 are disposed on one end surface of the first clamping jaw, and a wire disc 1203 is disposed in the concave space H122.

[0069] The wire reel 1203 is hollow and rotatably mounted on the first step shaft H123 of the first chuck body 1201. A spiral groove H126 is provided on one end face of the wire reel 1203. The pressure plate 1204 is provided on the outside of the concave space H122 and is fixedly connected to the first chuck body 1201. The spiral groove H126 of the wire reel 1203 cooperates with the tooth groove H125 provided on one end face of the first clamping jaw 1202 for transmission, and ja is an integer greater than or equal to 2.

[0070] See attached Figure 2 , 5 , 8, 11, the pneumatic clamping source assembly 13 includes a first left cylinder 1301, a first right cylinder 1302, a first left cylinder mounting plate 1303, a first right cylinder mounting plate 1304, a first left connecting block 1305, a first right connecting block 1306, a first left ratchet disc 1307, a first right ratchet disc 1308, a first left driving shaft 1309, a first right driving shaft 1310, a first pawl rotating shaft 1311, a first swinging pawl 1312, a first left sealing plate 1313, and a first right sealing plate 1314;

[0071] The first left ratchet disc 1307 and the first right ratchet disc 1308 are hollow. The first left ratchet disc 1307 is provided with a first left radial protrusion N111, and the first right ratchet disc 1308 is provided with a first right radial protrusion N112. The first left ratchet disc 1307 is provided with a first left disc recessed groove N101 on the inner side, and a first left drive shaft mounting hole is provided in the first left disc recessed groove N101.

[0072] N102, a first right disc recessed groove N103 is provided on the inner side of the first right disc recessed groove N103, a horizontal first right through-active groove N104 is provided in the first right disc recessed groove N103, a first pawl shaft mounting hole N105 is also provided on the inner side of the first left ratchet disc 1307 and the first right ratchet disc 1308 at a coaxial position up and down, a first swing pawl 1312 is provided with a pawl shaft mounting hole, a first left pawl tooth N109 is provided on the left side of one end of the first swing pawl 1312, and a first right pawl tooth N110 is provided on the right side, the first swing pawl 1312 is also provided with a longitudinal first left through-active groove N107, the longitudinal first left through-active groove N107 is coaxial with the center point of the first right through-active groove N104 and is arranged at a certain non-parallel angle, the first swing pawl 1312 is arranged in the first left disc recessed groove N101 and the first right disc recessed groove N103;

[0073] The first left cylinder 1301 is fixedly connected to the first left cylinder mounting plate 1303, the first right cylinder 1302 is fixedly connected to the first right cylinder mounting plate 1304, the first left cylinder mounting plate 1303 is rotatably connected to the first mounting base plate 1101, the first right cylinder mounting plate 1304 is rotatably connected to the first mounting base plate 1101, the first left connecting block 1305 is fixed to the output end of the first left cylinder 1301, the first right connecting block 1306 is fixed to the output end of the first right cylinder 1302, the first left connecting block 1305 is rotatably connected to the first left driving shaft 1309, the first right driving shaft 1310 is fixed to the first right connecting block 1306, the first left driving shaft 1309 is fixed to the first left driving shaft mounting hole N102, the first right driving shaft 1310 is penetrated in the first right transverse through-active groove N104, and one end thereof is arranged in the first left longitudinal through-active groove N107;

[0074] The first left ratchet disc 1307 is coaxially fixedly connected with the first right ratchet disc 1308, two ends of the first pawl shaft 1311 are respectively fixed in the first pawl shaft mounting holes N105 of the first left ratchet disc 1307 and the first right ratchet disc 1308, the first swing pawl 1312 is rotatably arranged on the first pawl shaft 1311, the first left sealing plate 1313 is fixedly connected with the first left ratchet disc 1307 and the first right ratchet disc 1308, and the first right sealing plate 1314 is fixedly connected with the first left ratchet disc 1307 and the first right ratchet disc 1308;

[0075] The control method is that when a counterclockwise rotation motion is required, the first left cylinder 1301 extends, and then the first right cylinder 1302 retracts. At this time, the first left cylinder 1301 will first push the first swing pawl 1312 to swing. The swing of the first swing pawl 1312 makes the first right pawl tooth N110 approach the center of the circle and press on the first ratchet tooth T105 and push it to move together. During the return stroke, the first left cylinder 1301 is in a state of no air or low pressure air, and the first right cylinder 1302 extends to push the first The left ratchet disk 1307 and the first right ratchet disk 1308 move clockwise, and the first swing pawl 1312 lags behind the movement of the first left ratchet disk 1307 and the first right ratchet disk 1308, thereby generating no clockwise force on the first ratchet tooth T105. When an object is clamped counterclockwise, that is, the output position of the first left cylinder 1301 is continuously detected, the first right cylinder 1302 can output a retraction action, and the first swing pawl 1312 can output double torque, and the opposite control can be used when outputting a clockwise rotational motion.

[0076] In some embodiments of the present application, Figure 2 , 5, 8, 11, the pneumatic clamping source component 13 is penetrated in the first notch T104, the first swing pawl 1312 of the pneumatic clamping source component 13 and the first ratchet T105 that can drive the outer side of the fourth gear 1108, the first shell 1102 is rotatably connected with the first left ratchet disk 1307 and the first right ratchet disk 1308, the wire disk 1203 and the ma third gears 1107 of the transmission component 11 are all engaged for transmission, the second gear 1106 of the transmission component 11 is fixed on the first step shaft H123 of the first chuck body 1201, the first step shaft H123 is penetrated in the transmission component 11, and can be led out from the other side thereof.

[0077] For example, the second gear 1106 and the transmission gear H124 of the wire disc 1203 are all spur or helical gears with a tooth number of 86 and a module of 2, na first gears 1104 and ma third gears 1107 are all spur or helical gears with a tooth number of 20 and a module of 2, the first housing 1102 and the inner transmission teeth of the fourth gear 1108 are all spur or helical gears with a tooth number of 126 and a module of 2, and the transmission ratio of the outer transmission teeth of the fourth gear 1108 to the first worm 1304 is 0.2;

[0078] Assume that the second gear 1106 inputs a rotation speed of +1000rpm (clockwise is positive, counterclockwise is negative), and the fourth gear 1108 inputs a speed of zero. Since na first gears 1104 and ma third gears 1107 are all mounted on the first gear mounting frame 1105, the rotation speed of the wire reel 1203 is +1000rpm, and the relative speed with the second gear 1106 is zero. When the first worm 1304 outputs a rotation speed of -100rpm, the fourth gear 1108 inputs a rotation speed of -20rpm. At this time, the wire reel 1203 is synthesized under the common first gear mounting frame 1105 and the fourth gear 1108 input motion.

[0079] The independent output speed of the shared first gear mounting frame 1105 to the wire reel 1203 is +1000rpm

[0080] When the first gear mounting frame 1105 fixes the fourth gear 1108 to input the motion and the wire reel 1203 to output the motion, the transmission ratio is 126 / 86, the direction is negative, and the independent output speed of the fourth gear 1108 to the wire reel 1203 is 100*126 / 86=+146.512rpm

[0081] Under the action of the second gear 1106 and the fourth gear 1108, the combined speed is 1000+(+146.512)=1146.512 rpm. At this time, the relative speed between the second gear 1106 and the wire disc 1203 is +146.512 rpm.

[0082] The beneficial effects of this embodiment are simple structure and low cost. The first gear 1104 and the third gear 1107 are arranged on the first gear mounting frame 1105 in an upper and lower arrangement, so that the output of the holding source part can be transmitted to the relatively rotatable clamping component through the transmission component. At the same time, the axial space is small. The pneumatic clamping source 13 uses a cylinder combined with a ratchet mechanism to drive the rotation of the fourth gear 1108, which greatly reduces the cost. The spiral groove H126 of the wire reel 1203 cooperates with the tooth groove H125 to achieve self-locking.

[0083] In some embodiments of the present application, Figure 3 , 6 The transmission assembly 21 includes a second clamping source shield 2102 and a second mounting base plate 2101, all of which are hollow, a first spur tooth 2103, nb second spur teeth 2104, nb planetary spur tooth mounting columns 2105, two times nb spur tooth planetary sleeves 2106, a third spur tooth 2107, a fourth spur tooth 2108, a fourth spur tooth input plate 2109, a fourth spur tooth input ratchet 2110, nb fifth spur teeth 2111, a sixth spur tooth 2112, a spur tooth output shaft 2113, a planetary mounting upper plate 2114, a planetary mounting lower plate 2115, and a fourth spur tooth pressure plate 2116;

[0084] The second mounting base plate 2101, the first spur tooth 2103, the fourth spur tooth 2108, the fourth spur tooth input plate 2109, and the fourth spur tooth input ratchet 2110 are arranged in sequence from bottom to top. A fourth spur tooth pressure plate 2116 is fixed to one end of the first spur tooth 210, and a fourth spur tooth recessed groove HB is provided on the inner side of the end face. The fourth spur tooth 2108 is rotatably arranged in the fourth spur tooth recessed groove HB. The first spur tooth 2103 is fixedly connected to the second mounting base plate 2101, the first spur tooth 2103 is rotatably connected to the fourth spur tooth 2108, and the fourth spur tooth 2108 is rotatably connected to the fourth spur tooth 2108. The tooth input plate 2109 is fixedly connected, the fourth spur input plate 2109 is fixed with a fourth spur input ratchet 2110, the second mounting base plate 2101 is also fixed with a second clamping source shield 2102, the second clamping source shield 2102 is provided with a plurality of second observation windows JB, the spur output shaft 2113 is provided with a plurality of slideways DB, the spur output shaft 2113 is provided with a first transmission thread EB on the outside, and a mounting connection thread FB on the inside, a planetary mounting lower plate 2115 is provided above the second mounting base plate 2101, and the planetary mounting lower plate

[0085] nb planetary spur gear mounting columns 2105 are fixed on 2115, and two upper and lower spur gear planetary shaft sleeves 2106 are rotatably arranged on each planetary spur gear mounting column 2105. The outer sides of the upper and lower spur gear planetary shaft sleeves 2106 are respectively fixed with the second spur gear 2104 and the fifth spur gear 2111. The nb second spur gears 2104 are all meshed with the first spur gear 2103 for transmission, and are all meshed with the third spur gear 2107 for transmission, and the nb fifth spur gears 2111 are all meshed with the fourth spur gear 2108 for transmission. The third spur tooth 2107 is rotatably connected to the sixth spur tooth 2112, and the first transmission thread EB is transmission-connected to the second transmission thread GB. The fourth spur tooth input ratchet 2110 is provided with a second ratchet tooth BB on the outside, nb is an integer greater than or equal to 2, and pb is an integer greater than or equal to 2.

[0086] In some embodiments of the present application, Fig. 9 The clamping assembly 22 includes a second chuck body 2201, a connecting nut 2202, a connecting nut pressing plate 2203, a moving wedge block 2204, a second chuck connecting shaft 2206 and kc second clamping jaws 2205, all of which are hollow;

[0087] A stepped shaft E201 is provided at one end of the second chuck body 2201, and kc second slide grooves E202 are provided on one end surface of the second chuck body 2201. Each second clamping jaw 2205 can be slidably arranged on the second chuck body 2201 through the second slide groove E202. A wedge surface E203 is provided on the second clamping jaw 2205, and a wedge groove E204 is provided on the movable wedge block 2204. The wedge surface E203 and the wedge groove E204 are slidably connected. A countersunk groove is provided on one end surface of the second chuck connecting shaft 2206.

[0088] E206, a plurality of notched grooves E205 are arranged on the side, the third spur tooth 2107 of the transmission assembly 21 is fixedly connected to the second chuck connecting shaft 2206 through the countersunk groove E206, the spur tooth output shaft 2113 of the transmission assembly 21 is slidably connected to the second chuck connecting shaft 2206 up and down through the slideway DB and the notched groove E205, the second chuck connecting shaft 2206 is provided with an end face on the side of the countersunk groove E206 and is fixedly connected to the step shaft E201 of the second chuck body 2201, the moving wedge block 2204 is slidably connected to the second chuck body 2201, a connecting nut pressure plate 2203 is fixed on one end face of the moving wedge block 2204, the connecting nut 2202 is rotatably arranged between the moving wedge block 2204 and the connecting nut pressure plate 2203, the second chuck body 2201, the second chuck body 2201, kc is an integer greater than or equal to 2.

[0089] See attached Fig.12 , Embodiment 2, the pneumatic clamping source assembly 23 includes a second left cylinder 2301, a second right cylinder 2302, a second left cylinder mounting plate 2303, a second right cylinder mounting plate 2304, a second left connecting block 2305, a second right connecting block 2306, a second left ratchet disc 2307, a second right ratchet disc 2308, a second left driving shaft 2309, a second right driving shaft 2310, a second pawl rotating shaft 2311, a second swinging pawl 2312, a second left cylinder fixing plate 2313, and a second right cylinder fixing plate 2314;

[0090] The second left ratchet disk 2307 and the second right ratchet disk 2308 are hollow, the second left ratchet disk 2307 is provided with a second left radial protrusion M211, the second right ratchet disk 2308 is provided with a second right radial protrusion M212, the second left drive shaft mounting hole M201 is provided on the second left radial protrusion M211 provided on the second left ratchet disk 2307, the second right disk sinking groove M202 is provided on the inner side of the second right ratchet disk 2308, the second right radial protrusion M212 is provided with a transverse second right through active groove M203, the second left ratchet disk 2307 and the second right ratchet disk 2308 are provided with a second right radial protrusion M212. A second pawl shaft mounting hole M204 is also provided at the coaxial position of the upper and lower inner sides of the wheel disc 2308, a pawl shaft mounting hole is provided at the second swing pawl 2312, a second left pawl tooth M209 is provided at the left side of one end of the second swing pawl 2312, and a second right pawl tooth M210 is provided at the right side, the second swing pawl 2312 is also provided with a longitudinal second left through-active groove M207, the longitudinal second left through-active groove M207 is coaxial with the center point of the second right through-active groove M203 and is arranged at a certain non-parallel angle, and the second swing pawl 2312 is arranged in the second right disc sink groove M203;

[0091] The second left cylinder 2301 is fixedly connected to the second left cylinder mounting plate 2303, the second right cylinder 2302 is fixedly connected to the second right cylinder mounting plate 2304, the second left cylinder mounting plate 2303 is rotatably connected to the second left cylinder fixing plate 2313, the second right cylinder mounting plate 2304 is rotatably connected to the second right cylinder fixing plate 2314, the second left cylinder fixing plate 2313 is rotatably connected to the second mounting base plate 2101, the second right cylinder fixing plate 2314 is rotatably connected to the second mounting base plate 2101, the second left connecting block 2305 is fixed to the output end of the second left cylinder 2301, the second right connecting block 2306 is fixed to the output end of the second right cylinder 2302, and the second left connecting block

[0092] 2305 is fixedly connected to the second left drive shaft 2309, a second right drive shaft 2310 is fixed on the second right connecting block 2306, the second left drive shaft 2309 is rotatably arranged in the second left drive shaft mounting hole M201, the second right drive shaft 2310 is passed through the second right transverse through movable groove M203, and one end thereof is arranged in the second left longitudinal through movable groove M207;

[0093] The second left ratchet plate 2307 is coaxially fixedly connected with the second right ratchet plate 2308 , and both ends of the second pawl shaft 2311 are rotatably arranged in the second pawl shaft mounting holes M204 of the second left ratchet plate 2307 and the second right ratchet plate 2308 , respectively. The second swing pawl 2312 is fixedly connected with the second pawl shaft 2311 .

[0094] The driving principle is as follows: the second left cylinder 2301 and the second right cylinder 2302 drive the driving gear shaft 2311 to move left and right, and the rotating driving cylinder 2312 drives the driving gear shaft 2311 to rotate through the gear bar. Since a radial incomplete angle second special driving tooth M105 is provided in the middle of the driving gear shaft 2311, the rotation of the driving gear shaft 2311 can realize the change of the angle of the second special driving tooth M105, thereby realizing meshing transmission or non-meshing transmission.

[0095] See attached Figure 3 , 6 9, 12, Example 2, the pneumatic clamping source assembly 23 is arranged in the second pneumatic clamping source installation hole K201 of the transmission assembly and is driven by the second special drive gear

[0096] M105 is meshed with the fourth spur input plate 2109 for transmission, and is meshed with the jb jaw moving spur teeth 2207 of the transmission assembly 21 for transmission. The first spur tooth 2103 of the transmission assembly 21 is fixed on the second step shaft Z201 of the second chuck body 2201 of the clamping assembly 22. The second step shaft Z201 passes through the transmission assembly 21 and can be led out from the other side thereof.

[0097] Assume that: the first spur gear 2103 and the fourth spur gear 2108 have the same number of teeth and module, which is module 2 and number of teeth 110; the third spur gear 2107 and the sixth spur gear 2112 have the same number of teeth and module, which is 74 and module 2; the nb second spur gears 2104 and the nb fifth spur gears 2111 have the same number of teeth and module, which is 18 and module 2;

[0098] When the third spur gear 2107 inputs a rotation speed of 1000 rpm, since the third spur gear 2107 has the same tooth number module as the sixth spur gear 2112, and the first spur gear 2103 and the fourth spur gear 2108 transmission teeth have the same tooth number module, and the two sets of planetary gear systems share a planet carrier, when the fourth spur gear 2108 input speed is zero, the two sets of planetary gears are gear systems with completely consistent motion states, and the rotation speed of the sixth spur gear 2112 is 1000 rpm.

[0099] For example, when the input speed of the fourth spur gear 2108 is -100 rpm, the speed of the sixth spur gear 2112 independently synthesized by the fourth spur gear 2108 is -100*(-110 / 74)=+148.65 rpm, and the speed of the sixth spur gear 2112 synthesized by all inputs is +1148.65 rpm;

[0100] The beneficial effects of this embodiment are simple structure and low cost. It can realize that the output of the holding source part is transmitted to the relatively rotatable clamping component through the transmission component. At the same time, the radial space is small. The clamping component adopts a push-pull wedge surface to achieve clamping. The clamping source part is driven by a cylinder, which is converted into a linear push-pull motion through the transmission component and transmitted to the wedge block of the clamping component to perform push-pull motion to achieve clamping transmission. The transmission component 12 adopts a threaded transmission method to achieve self-locking.

[0101] In some embodiments of the present application, Figure 4 , 7 The transmission assembly 31 includes a third mounting base plate 3101, a third housing 3102, a bevel gear housing pressure ring 3103, a first bevel gear 3104, nc second bevel gears 3105, nc second bevel gear mounting columns 3106, a bevel gear planetary sleeve 3107, a third bevel gear 3108, a fourth bevel gear 3109, nc fifth bevel gears 3110, a sixth bevel gear 3111, a bevel gear input gear 3112, a fourth bevel gear output shaft 3113, pc bevel gear transition teeth 3114, a bevel gear output shaft 3115, an output bevel gear 3116, and a third pneumatic clamping source shield 3117;

[0102] The third housing 3102 is provided with a third mounting cavity CC inside, a first bevel gear 3104, nc second bevel gears 3105, nc second bevel gear mounting columns 3106, a bevel gear planetary sleeve 3107, a third bevel gear 3108, a fourth bevel gear 3109, nc fifth bevel gears 3110, a sixth bevel gear 3111, a bevel gear input gear 3112, a fourth bevel gear output shaft 3113, pc bevel gear transition teeth 3114, a bevel gear output shaft 3115, and an output bevel gear. The teeth 3116 are all arranged in the third mounting cavity CC and are located above the third mounting base plate 3101. The sixth bevel tooth 3111 is arranged outside the first bevel tooth 3104. nc second bevel teeth 3105 are arranged above the first bevel tooth 3104. nc fifth bevel teeth 3110 are arranged outside the nc second bevel teeth 3105. The nc fifth bevel teeth 3110 are located above the sixth bevel tooth 3111. The third bevel teeth 3108 are arranged above the nc second bevel teeth 3105.

[0103] A fourth bevel gear 3109 is arranged on the outside of the third bevel gear 3108, and the fourth bevel gear 3109 is located above nc fifth bevel gears 3110, a bevel gear input gear 3112 is arranged on the outside of the sixth bevel gear 3111, and a third ratchet gear D303 is arranged on the outside of the bevel gear input gear 3112, and the pneumatic clamping source component 33 drives the third ratchet gear D303 of the bevel gear input gear 3112 to rotate, a fourth bevel gear output shaft 3113 is arranged above the fourth bevel gear 3109, and pc bevel gear transition teeth 3114 and a bevel gear output shaft 3115 are arranged on the inside of the fourth bevel gear output shaft 3113, an output bevel gear 3116 is fixed to one end of the bevel gear output shaft 3115, and a transmission gear is arranged on the outside of the output bevel gear 3116;

[0104] The third housing 3102 is provided with a third notch D301, the third notch D301 is penetrated with a pneumatic clamping source 33, fixedly connected to the third mounting base plate 3101 and located outside the third housing 3102, the pneumatic clamping source 33 is arranged inside, the third bevel gear 3108 is fixedly connected to the clamping assembly 32, pc bevel gear transition teeth 3114 are all installed on the clamping assembly 32 and rotatably connected thereto, and are provided with a guide groove D302, and are slidably connected to the clamping assembly 32 through the guide groove D302;

[0105] The third housing 3102 and the third pneumatic clamping source shield 3117 are fixed on the third mounting base plate 3101, the bevel gear housing pressure ring 3103 is fixed to one end surface of the third housing 3102, the first bevel gear 3104 is fixedly connected to the third mounting base plate 3101, nc second bevel gears 3105 are all meshed with the first bevel gear 3104 for transmission, nc second bevel gears 3105 are rotatably connected to nc second bevel gear mounting columns 3106 in a one-to-one manner, nc second bevel gear mounting columns 3106 are fixed to the inner side of the bevel gear planetary sleeve 3107, the bevel gear planetary sleeve 3107 is rotatably connected to the third housing 3102, the third bevel gear 3108 is meshed with nc second bevel gears 3105 for transmission, the fourth bevel gear 3109 is meshed with nc fifth bevel gears 3110 for transmission, and the nc fifth bevel gears 3110 are meshed with each other for transmission. The tooth 3110 is rotatably connected one-to-one with the nc second bevel gear mounting columns 3106 and is located on the outside of the second bevel gear 3105, the nc fifth bevel gears 3110 are all meshed with the sixth bevel gear 3111 for transmission, the sixth bevel gear 3111 is fixedly connected with the bevel gear input tooth 3112, the bevel gear input tooth 3112 is rotatably connected with the third housing 3102, the fourth bevel gear 3109 is fixedly connected with the fourth bevel gear output shaft 3113, the fourth bevel gear output shaft 3113 is provided with internal transmission teeth, the fourth bevel gear output shaft 3113 and pc bevel gear transition teeth 3114 are all internally meshed for transmission, the bevel gear output shaft 3115 is provided with transmission teeth, the bevel gear output shaft 3115 and pc bevel gear transition teeth 3114 are all externally meshed for transmission, nc is an integer greater than or equal to 2, and pc is an integer greater than or equal to 2.

[0106] Assume that: the sixth bevel gear 3111 and the fourth bevel gear 3109 have the same number of teeth and module, and are both bevel gears with a number of teeth of 148 and a module of 2; the first bevel gear 3104 and the third bevel gear 3108 have the same number of teeth and module, and are both bevel gears with a number of teeth of 130 and a module of 2; the nc second bevel gears 3105 and the nc fifth bevel gears 3110 have the same number of teeth and module, and are both bevel gears with a gear number of 20 and a module of 2, but with unequal pitch cone angles;

[0107] Assume that at this time the input speed of the third bevel gear 3108 is -1000rpm, the first bevel gear 3104 and the third bevel gear 3108 have the same tooth number module, and the transmission ratio is 1. Due to the shared planetary carrier, when the input speed of the sixth bevel gear 3111 is zero, the speeds of the fourth bevel gear 3109 and the third bevel gear 3108 are both +1000rpm. At this time, the input speed of the sixth bevel gear 3111 is -100rpm, and the speed of the fourth bevel gear 3109 independently synthesized by the sixth bevel gear 3111 is +100rpm. At this time, under the joint action of the sixth bevel gear 3111 and the third bevel gear 3108, the synthesized speed of the fourth bevel gear 3109 is +1100rpm, and the speed of the third bevel gear 3108 relative to the fourth bevel gear 3109 is +100rpm.

[0108] See attached Fig.10, Embodiment 3, the clamping assembly 32 includes a third chuck body 3201, jb third clamping jaws 3202, jb third movable screw nuts 3203, jb third movable screws 3204, jb pairs of third bearings 3205, jb third bearing mounting blocks 3206, jb clamping jaw movable spur teeth 3207, and jb movable spur tooth pressing blocks 3208;

[0109] The third chuck body 3201 is hollow, and a third step shaft Z301 is provided at one end of the third chuck body 3201. The root of the third step shaft Z301 is provided with pb third through slots G301. The spur gear 3114 of the transmission assembly 31 can be rotatably arranged in the third through slot G301. The third bevel gear 3108 of the transmission assembly 31 is fixed on the third step shaft Z301. The fourth bevel gear 3109 can be rotatably sleeved on the third step shaft Z301. The third step shaft Z301 is penetrated in the transmission assembly 31 and can be led out from the other side thereof.

[0110] One end surface of the third chuck body 3201 is provided with a third sliding groove Z302, each third sliding groove Z302 is provided with a third clamping jaw 3202, the third clamping jaw 3202 is slidably connected to the third chuck body 3201, the third clamping jaw 3202 is fixedly connected to the third movable screw nut 3204 in a one-to-one manner, each third movable screw nut 3204 is provided with a third movable screw 3205, and one end of each third movable screw 3204 is fixed with a third bearing 3205.

[0111] A third bearing mounting block 3206 is installed on 3205, and each third bearing mounting block 3206 is fixedly connected to the third chuck body 3201. A clamping jaw moving straight tooth 3207 is also fixed at one end of each third movable screw rod 3204, and a movable scattered tooth pressure block 3208 is installed on the outer side of each clamping jaw moving scattered tooth 3207, and jb is an integer greater than or equal to 2.

[0112] See attached Fig.13 , Embodiment 3, the pneumatic clamping source assembly 33 includes a third left cylinder 3301, a third right cylinder 3302, a third left cylinder mounting plate 3303, a third right cylinder mounting plate 3304, a third left cylinder connecting block 3305, a third right cylinder connecting block 3306, a third left connecting shaft 3307, a third right connecting shaft 3308, a third ratchet disc 3309, a third pawl cylinder 3310, a third movable pawl 3311, a third left sealing plate 3312, and a third right sealing plate 3313;

[0113] The third ratchet disc 3309 is provided with a third radial protrusion W101, a third pawl slot W102 is provided on the third radial protrusion W101, and a third pawl tooth W103 is provided at one end of the third movable pawl 3311;

[0114] The third left cylinder mounting plate 3303 is rotatably connected to the third housing 3101, the third right cylinder mounting plate 3304 is rotatably connected to the third housing 3101, the third ratchet disc 3309 is inserted into the third notch D301 and is rotatably connected to the third housing 3101; the third left cylinder 3301 is fixedly connected to the third left cylinder mounting plate 3303, the third right cylinder 3302 is fixedly connected to the third right cylinder mounting plate 3304, the output end of the third left cylinder 3301 is fixed with a third left cylinder connecting block 3305, the output end of the third right cylinder 3302 is fixed with a third right cylinder connecting block 3306, the third left cylinder connecting block 3305 is fixed with the third left connecting block The shaft 3307 is rotatably connected, the third right cylinder connecting block 3306 is rotatably connected to the third right connecting shaft 3308, the third left connecting shaft 3307 is fixed on the third ratchet disk 3309, the third right connecting shaft 3308 is fixed on the third ratchet disk 3309, the third pawl cylinder 3310 is fixed on the third ratchet disk 3309, and the third movable pawl 3311 is fixed on the output end of the third pawl cylinder 3310. The third movable pawl 3311 can be slidably set in the third pawl groove W102, and the third pawl tooth W103 can be connected or disconnected with the third ratchet tooth D303 under the control of the third pawl cylinder 3310, thereby realizing power transmission or disconnection.

[0115] In some embodiments, referring to Figure 4 , 7 , 10, 13, the pneumatic clamping source component 33 is arranged on the outside of the third housing 3102 of the transmission component, the third pawl cylinder 3310 controls the connection or disconnection of the third ratchet D303, the third bevel tooth 3108 of the transmission component 31 is fixed on the third chuck mounting shaft 3202 of the pneumatic clamping source component 33, pc bevel gear transition teeth 3114 are respectively arranged in pc second through-grooves E302, the bevel gear output shaft 3115 is provided with a step countersunk hole E301, the third chuck mounting shaft 3202 passes through the transmission component 31, and can be led out from the other side thereof.

[0116] The beneficial effects of this embodiment are simple structure and low cost. The transmission component adopts bevel gear transmission to realize power transmission. The inner bevel gear is radially arranged from the inside to the outside in sequence to reduce the axial and radial spaces. The pneumatic clamping source component 33 adopts the third ratchet cylinder 3310 to control the transmission method of connecting or disconnecting the third ratchet D303. The structure is simple. The clamping component 32 adopts radial screw transmission method, which can realize radial movement of the second clamping jaw 3202 and high repeated positioning accuracy. The transmission component 32 adopts screw transmission method to realize self-locking of the clamping jaw.

[0117] According to the second aspect of the utility model, a machine tool is also provided, comprising a machine body and the pneumatic clamping device of the above embodiment installed on the machine body, the transmission device 1 is fixed to the machine body, and the clamping assembly 2 is fixedly connected to the power output end of the machine tool.

[0118] Optionally, the cylinder includes but is not limited to a cylinder, a hydraulic cylinder, a gas-liquid booster cylinder, and other mechanisms or elements that output linear motion.

[0119] Working principle: A clamping component is inserted into the transmission component and can be led out from the other end. When the power is output from the pneumatic clamping source component and passes through the transmission component, the clamping source part transmits power by a ratchet and ratchet transmission method. The ratchet and the pawl are disconnected and connected by controlling the cylinder action sequence, thereby realizing power transmission or disconnection or reciprocating motion. A gear train is arranged inside the transmission component. The transmission principle of the gear train is a planetary gear motion mechanism. A common planetary carrier, i.e., the first gear mounting frame, planetary spur gear mounting column, and bevel gear planetary sleeve of the above-mentioned embodiment are adopted, which can be equivalent to a planetary carrier shared by two sets of planetary gear trains. At this time, it can be understood that the gear ring of the lower planetary gear train is fixed, and the gear ring of the upper planetary gear train can input motion. The common planetary carrier and the planetary wheels, the upper sun wheel, and the lower sun wheel are all in a free state. At this time, if the upper gear ring of the upper planetary gear train is input motion, the gear rings of the upper and lower planetary gear trains will move relative to each other. In order to offset this relative motion, the internal planetary gears and the sun wheel will also participate in the motion. The upper and lower planetary gears share a planet carrier, so the upper and lower planetary gears cannot be displaced relative to each other. In order to offset the relative movement of the upper and lower gear rings, the upper planetary gear can only rotate on its own to offset the relative movement of the upper and lower gear rings regardless of whether the planet carrier is in a free or moving state. The relative rotation displacement of the upper planetary gear relative to the lower planetary gear requires the relative rotation displacement of the upper and lower sun gears to offset the rotation displacement of the upper and lower star systems. In this way, the relative displacement of the upper gear ring and the lower gear ring is transmitted to the relative displacement of the upper sun gear and the lower sun gear. The relative displacement of the upper sun gear and the lower sun gear can be converted into radial movement of the clamping claw through the clamping assembly. The transmission assembly can directly output rotational motion, or output linear reciprocating motion through the mutual cooperation of transmission threads and the cooperation of slide grooves and slideways. The clamping assembly outputs the rotational motion or linear reciprocating motion output by the transmission assembly, and realizes the clamping action of the clamping claw through the transmission scheme of spiral groove cooperation, wedge block cooperation, or lead screw nut cooperation. The technical scheme for realizing the clamping action greatly reduces the cost, has small size, simple structure, long service life, safety and environmental protection.

[0120] The above embodiments and drawings also propose feasible technologies for solving the technical problem of controllable relative motion between objects on a rotating object and rotating objects, such as realizing axial relative movement, radial relative movement, radial relative rotation and other movements on a rotating object. This technology can also be extended to other technical fields, such as machine tool tool clamping, ship pitch change, aerospace, automation equipment, robots, toys... and other technical fields. The above embodiments and drawings do not limit the product form and style of the utility model. Any appropriate changes or modifications made to them by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the utility model.

Claims

1. A pneumatic clamping device, characterized in that: include: A transmission assembly, the transmission assembly comprising a hollow mounting cavity, wherein a gear train is disposed in the mounting cavity; The clamping assembly comprises a disc body, a clamping claw and a clamping claw driving structure, wherein the disc body is arranged on one side end surface of the installation cavity, the clamping claw is arranged on the disc body, the driving structure is arranged in the disc body, and the driving structure is respectively connected to the clamping claw and the gear system in the installation cavity; A pneumatic clamping source component is arranged on the outside of the transmission component. The pneumatic clamping source component is gas-driven and can provide a power source for the gear train in the installation cavity.

2. The pneumatic clamping device according to claim 1, characterized in that: The transmission assembly includes a first mounting base plate, a first housing, a waterproof plate, na first gears, a first gear mounting frame, a second gear, ma third gears, a fourth gear, and a first pneumatic clamping source shield; The first shell is fixed to the first mounting base plate to form a hollow first mounting cavity, the first shell is provided with a first notch, the pneumatic clamping source component is inserted into the first notch, the inner side of the fourth gear is provided with a transmission tooth, and the outer side is provided with a first ratchet, the pneumatic clamping source component drives the first ratchet of the fourth gear, the first pneumatic clamping source shield is fixed to the first mounting base plate and is located on the outer side of the first shell, the first pneumatic clamping source shield is provided with a plurality of first observation windows, the pneumatic clamping source component is arranged in the first pneumatic clamping source shield, the inner side of the first shell is provided with a first shell transmission tooth, and the waterproof plate is fixed to an outer end surface of the first shell; The na first gears, the first gear mounting frame, the second gear, the ma third gears, and the fourth gear are all arranged in the first mounting cavity of the first housing and placed between the first mounting base plate and the waterproof plate, and the fourth gear is arranged above the transmission gear of the first housing; The na first gears are all meshed with the transmission teeth of the first housing for transmission. The first gear mounting frame is hollow. The upper and lower surfaces of the first gear mounting frame are respectively provided with na first cylindrical bosses and ma second cylindrical bosses. The na first gears are respectively rotatably arranged on the na first cylindrical bosses one by one. The na first gears are all meshed with the transmission teeth of the first housing for transmission. The second gear is hollow. The second gear is fixedly connected to the clamping assembly. Ma third gears are respectively rotatably arranged on the ma second cylindrical bosses one by one. Transmission teeth are arranged on the inner and outer sides of the fourth gear. The fourth gear is meshed with the ma third gears for transmission. The fourth gear is rotatably connected to the first housing. The third gear is transmission-connected to the clamping assembly. The transmission wheel of the first housing and the transmission teeth in the fourth gear have the same tooth number modulus. The na first gears and the ma third gears have the same tooth number modulus. The na is an integer greater than or equal to 2, and the ma is an integer greater than or equal to 2.

3. The pneumatic clamping device according to claim 2, characterized in that: The transmission assembly includes a second clamping source shield and a second mounting base plate which is hollow, a first spur tooth, nb second spur teeth, nb planetary spur tooth mounting columns, twice nb spur tooth planetary sleeves, a third spur tooth, a fourth spur tooth, a fourth spur tooth input plate, a fourth spur tooth input ratchet, nb fifth spur teeth, a sixth spur tooth, a spur tooth output shaft, a planetary mounting upper plate, a planetary mounting lower plate, and a fourth spur tooth pressure plate; The second mounting base plate, the first spur tooth, the fourth spur tooth, the fourth spur tooth input plate, and the fourth spur tooth input ratchet are arranged in sequence from bottom to top, the fourth spur tooth pressure plate is fixed to one end of the first spur tooth, and the fourth spur tooth recessed groove is arranged on the inner side of the end face, and the fourth spur tooth is rotatably arranged in the fourth spur tooth recessed groove, the first spur tooth is fixedly connected to the second mounting base plate, the first spur tooth is rotatably connected to the fourth spur tooth, the fourth spur tooth is fixedly connected to the fourth spur tooth input plate, and the fourth spur tooth input ratchet is fixed on the fourth spur tooth input plate, the second clamping source shield is also fixed to the second mounting base plate, and a plurality of second observation windows are arranged on the second clamping source shield, the spur tooth output shaft is provided with a plurality of slideways DK, the first transmission thread EK is arranged on the outer side of the spur tooth output shaft, and the mounting connection thread FK is arranged on the inner side, and the planetary mounting lower plate is arranged on the second mounting base plate, The nb planetary spur gear mounting columns are fixed on the planetary mounting lower plate, and the upper and lower spur gear planetary sleeves are rotatably provided on each planetary spur gear mounting column, and the second spur gear and the fifth spur gear are respectively fixed on the outer sides of the upper and lower spur gear planetary sleeves, the nb second spur gears are all meshed with the first spur gears for transmission, and are all meshed with the third spur gears for transmission, the nb fifth spur gears are all meshed with the fourth spur gears for transmission, and are all meshed with the sixth spur gears for transmission, the other end of each planetary spur gear mounting column is fixed on the planetary mounting upper plate, the third spur gear is rotatably connected with the sixth spur gear, a second transmission thread GK is provided on the inner side of the sixth spur gear, the first transmission thread EK is transmission-connected with the second transmission thread GK, and a second ratchet tooth is provided on the outer side of the fourth spur gear input ratchet, nb is an integer greater than or equal to 2, and pb is an integer greater than or equal to 2.

4. The pneumatic clamping device according to claim 3, characterized in that: The transmission assembly includes a third mounting base plate, a third housing, a bevel gear housing pressure ring, a first bevel gear, nc second bevel gears, nc second bevel gear mounting columns, a bevel gear planetary sleeve, a third bevel gear, a fourth bevel gear, nc fifth bevel gears, a sixth bevel gear, a bevel gear input gear, a fourth bevel gear output shaft, pc bevel gear transition gears, a bevel gear output shaft, and a bevel gear output nut, a bevel gear output screw, a bevel gear screw guide plate, an output bevel gear, and a third pneumatic clamping source shield; a third mounting cavity is provided inside the third housing, and the first bevel gear, nc second bevel gears, nc second bevel gear mounting columns, a bevel gear planetary sleeve, a third bevel gear, a fourth bevel gear, nc fifth bevel gears, a sixth bevel gear, a bevel gear input gear, a fourth bevel gear output shaft, pc bevel gear transition gears, a bevel gear output shaft and an output bevel gear are all provided in the third mounting cavity, and the third housing is provided above the third mounting base plate , the sixth bevel gear is arranged on the outside of the first bevel gear, the nc second bevel gears are arranged above the first bevel gear, the nc fifth bevel gears are arranged on the outside of the nc second bevel gears, the nc fifth bevel gears are located above the sixth bevel gear, the third bevel gear is arranged above the nc second bevel gears, the fourth bevel gear is arranged on the outside of the third bevel gear, the fourth bevel gear is located above the nc fifth bevel gears, the bevel gear input gear is arranged on the outside of the sixth bevel gear, the third ratchet gear is arranged on the outside of the bevel gear input gear, the pneumatic clamping source assembly drives the third ratchet gear of the bevel gear input gear to rotate, a fourth bevel gear output shaft is arranged above the fourth bevel gear, the pc bevel gear transition teeth and the bevel gear output shaft are arranged on the inside of the fourth bevel gear output shaft, the output bevel gear is fixed to one end of the bevel gear output shaft, and a transmission gear is arranged on the outside of the output bevel gear; The third housing is provided with a third notch, a pneumatic clamping source is penetrated through the third notch, the third pneumatic clamping source shield is fixedly connected to the third mounting base plate and is located outside the third housing, the pneumatic clamping source is arranged in the third pneumatic clamping source shield, the third bevel gear is fixedly connected to the clamping assembly, the bevel gear screw guide plate is provided with a guide groove, and the bevel gear screw guide plate is slidably connected to the clamping assembly through the guide groove; The third housing and the third pneumatic clamping source shield are fixed to the third mounting base plate, the bevel gear housing pressure ring is fixed to one end face of the third housing, the first bevel gear is fixedly connected to the third housing, nc second bevel gears are meshed with the first bevel gear for transmission, nc second bevel gears are rotatably connected to nc second bevel gear mounting posts one by one, and nc second bevel gear mounting posts are fixed to the inner side of the bevel gear planetary sleeve, The bevel gear planetary sleeve is rotatably connected to the third outer shell, the third bevel gear is meshed with nc of the second bevel gears for transmission, the fourth bevel gear is meshed with the nc fifth bevel gears for transmission, nc of the fifth bevel gears are rotatably connected one-to-one with nc of the second bevel gear mounting columns and are located on the outside of the second bevel gear, nc of the fifth bevel gears are meshed with the sixth bevel gear for transmission, the sixth bevel gear is fixedly connected to the bevel gear input gear, the bevel gear input gear is rotatably connected to the third outer shell, the fourth bevel gear is fixedly connected to the fourth bevel gear output shaft, the fourth bevel gear output shaft is provided with internal transmission teeth, the fourth bevel gear output shaft is internally meshed with pc of the bevel gear transition teeth, the bevel gear output shaft is provided with transmission teeth, the bevel gear output shaft is externally meshed with pc of the bevel gear transition teeth, nc is an integer greater than or equal to 2, and pc is an integer greater than or equal to 2.

5. The pneumatic clamping device according to claim 4, characterized in that: The clamping assembly includes a first chuck body, a first clamping jaw, a wire disc, and a pressing plate; The first chuck body is hollow, and a first slide groove is arranged on the first chuck body. An inner concave space is arranged on one end surface of the first chuck body, and the inner concave space is connected with the first slide groove. A first step shaft is arranged in the middle of the inner concave space of the first chuck body, and a transmission tooth is arranged on the other end surface of the wire disc, and the transmission tooth of the wire disc is transmission-connected with the transmission assembly; A first clamping jaw is slidably arranged in each of the first sliding grooves, a plurality of tooth grooves are arranged on one end face of the first clamping jaw, a wire reel is arranged in the concave space, the wire reel is hollow and rotatably sleeved on the first step shaft of the first chuck body, a spiral groove is arranged on one end face of the wire reel, the pressure plate is arranged on the outside of the concave space and fixedly connected to the first chuck body, the spiral groove cooperates with the tooth grooves arranged on one end face of the first clamping jaw for transmission, and ja is an integer greater than or equal to 2.

6. The pneumatic clamping device according to claim 5, characterized in that: The clamping assembly comprises a second chuck body, a connecting nut, a connecting nut pressure plate, a movable wedge, a second chuck connecting shaft and kc second clamping jaws, all of which are hollow; The second chuck body is hollow and has a stepped shaft on the outside. One end surface of the second chuck body is provided with kc second sliding grooves. Each second clamping jaw can be slidably arranged on the second chuck body through the second sliding groove. The second clamping jaw is provided with a wedge surface. The movable wedge block is provided with a wedge groove. The wedge surface and the wedge groove are slidably connected. One end surface of the second chuck connecting shaft is provided with a countersunk groove, and a plurality of notched sliding grooves are provided on the side. The third spur tooth of the transmission assembly is fixedly connected to the second chuck connecting shaft through the countersunk groove. The output shaft is slidably connected to the second chuck connecting shaft up and down through the sliding cooperation of the slideway DK and the notched slide groove. The second chuck connecting shaft is provided with an end face on the countersunk groove side and is fixedly connected to the step shaft of the second chuck body. The movable wedge block is slidably connected to the second chuck body. The connecting nut pressure plate is fixed to one end face of the movable wedge block. The connecting nut is rotatably arranged between the movable wedge block and the connecting nut pressure plate. The second chuck connecting shaft is passed through the transmission assembly and can be led out from the other side thereof. kc is an integer greater than or equal to 2.

7. The pneumatic clamping device according to claim 6, characterized in that: The clamping assembly includes a third chuck body, jb third clamping jaws, jb third movable screw nuts, jb third movable screws, jb pairs of third bearings, jb third bearing mounting blocks, jb clamping jaw movable spur teeth, and jb movable spur tooth pressing blocks; The third chuck body is hollow, a third step shaft is arranged at one end of the third chuck body, and pb third through slots are arranged at the root of the third step shaft, the spur gear of the transmission assembly can be rotatably arranged in the third through slot, the third bevel gear of the transmission assembly is fixed on the third step shaft, the fourth bevel gear can be rotatably sleeved on the third step shaft, the third step shaft is passed through the transmission assembly, and can be led out from the other side thereof; The third movable jaw is provided with a movable frame, and the movable frame is provided with a movable frame.

8. The pneumatic clamping device according to claim 7, characterized in that: The pneumatic clamping source assembly includes a first left cylinder, a first right cylinder, a first left cylinder mounting plate, a first right cylinder mounting plate, a first left connecting block, a first right connecting block, a first left ratchet disc, a first right ratchet disc, a first left driving shaft, a first right driving shaft, a first pawl rotating shaft, a first swinging pawl, a first left sealing plate, and a first right sealing plate; The first left ratchet disc and the first right ratchet disc are hollow, the first left ratchet disc is provided with a first left radial protrusion, the first right ratchet disc is provided with a first right radial protrusion, the first left ratchet disc inner side is provided with a first left disc recessed groove, the first left disc recessed groove is provided with a first left drive shaft mounting hole, the first right ratchet disc inner side is provided with a first right disc recessed groove, a transverse first right through-active groove is provided in the first right disc recessed groove, the first left ratchet disc and the first right ratchet disc inner side are further provided with a first pawl rotating shaft mounting hole at a coaxial position up and down on the inner sides of the first left ratchet disc and the first right ratchet disc, the first swing pawl is provided with a pawl rotating shaft mounting hole, a first left pawl tooth is provided on the left side of one end of the first swing pawl, and a first right pawl tooth is provided on the right side, the first swing pawl is also provided with a longitudinal first left through-active groove, the longitudinal first left through-active groove is coaxial with the center point of the first right through-active groove and is arranged at a certain non-parallel angle, and the first swing pawl is arranged in the first left disc recessed groove and the first right disc recessed groove; The first left cylinder is fixedly connected to the first left cylinder mounting plate, the first right cylinder is fixedly connected to the first right cylinder mounting plate, the first left cylinder mounting plate is rotatably connected to the first mounting base plate, the first right cylinder mounting plate is rotatably connected to the first mounting base plate, the first left connecting block is fixed to the output end of the first left cylinder, the first right connecting block is fixed to the output end of the first right cylinder, the first left connecting block is rotatably connected to the first left driving shaft, the first right driving shaft is fixed to the first right connecting block, the first left driving shaft is fixed to the first left driving shaft mounting hole, the first right driving shaft is penetrated through the first transverse right through-active groove, and one end of the first right driving shaft is arranged in the first longitudinal left through-active groove; The first left ratchet disc is coaxially fixedly connected with the first right ratchet disc, two ends of the first pawl shaft are respectively fixed in the first pawl shaft mounting holes of the first left ratchet disc and the first right ratchet disc, the first swing pawl is rotatably arranged on the first pawl shaft, the first left sealing plate is fixedly connected with the first left ratchet disc and the first right ratchet disc, and the first right sealing plate is fixedly connected with the first left ratchet disc and the first right ratchet disc; The first left ratchet disc and the first right ratchet disc are inserted into the first notch, the first swing pawl can drive the first ratchet tooth on the outer side of the fourth gear, and the first housing is rotatably connected to the first left ratchet disc and the first right ratchet disc.

9. The pneumatic clamping device according to claim 8, characterized in that: The pneumatic clamping source assembly includes a second left cylinder, a second right cylinder, a second left cylinder mounting plate, a second right cylinder mounting plate, a second left connecting block, a second right connecting block, a second left ratchet disc, a second right ratchet disc, a second left driving shaft, a second right driving shaft, a second pawl rotating shaft, a second swinging pawl, a second left cylinder fixing plate, and a second right cylinder fixing plate; The second left ratchet disc and the second right ratchet disc are hollow, the second left ratchet disc is provided with a second left radial protrusion, the second right ratchet disc is provided with a second right radial protrusion, the second left radial protrusion provided by the second left ratchet disc is provided with a second left driving shaft mounting hole, the second right ratchet disc inner side is provided with a second right disc sunken groove, the second right radial protrusion is provided with a transverse second right through-active groove, the second left ratchet disc and the second right ratchet disc inner side are also provided with a second pawl rotating shaft mounting hole at the upper and lower coaxial positions, the second swing pawl is provided with a pawl rotating shaft mounting hole, the second swing pawl is provided with a second left pawl tooth on the left side of one end of the second swing pawl, and a second right pawl tooth on the right side, the second swing pawl is also provided with a longitudinal second left through-active groove, the longitudinal second left through-active groove is coaxial with the center point of the second right through-active groove and is arranged at a certain non-parallel angle, and the second swing pawl is arranged in the second right disc sunken groove; The second left cylinder is fixedly connected to the second left cylinder mounting plate, the second right cylinder is fixedly connected to the second right cylinder mounting plate, the second left cylinder mounting plate is rotatably connected to the second left cylinder fixing plate, the second right cylinder mounting plate is rotatably connected to the second right cylinder fixing plate, the second left cylinder fixing plate is rotatably connected to the second mounting base plate, the second right cylinder fixing plate is rotatably connected to the second mounting base plate, the second left connecting block is fixed to the output end of the second left cylinder, the second right connecting block is fixed to the output end of the second right cylinder, the second left connecting block is fixedly connected to the second left driving shaft, the second right driving shaft is fixed to the second right connecting block, the second left driving shaft is rotatably arranged in the second left driving shaft mounting hole, the second right driving shaft is penetrated in the second right transverse through-active groove, and one end thereof is arranged in the second left longitudinal through-active groove; The second left ratchet plate is coaxially fixedly connected with the second right ratchet plate, and both ends of the second pawl shaft are rotatably arranged in the second pawl shaft mounting holes of the second left ratchet plate and the second right ratchet plate respectively, and the second swing pawl is fixedly connected with the second pawl shaft.

10. The pneumatic clamping device according to claim 9, characterized in that: The pneumatic clamping source assembly includes a third left cylinder, a third right cylinder, a third left cylinder mounting plate, a third right cylinder mounting plate, a third left cylinder connecting block, a third right cylinder connecting block, a third left connecting shaft, a third right connecting shaft, a third ratchet plate, a third pawl cylinder, a third movable pawl, a third left sealing plate, and a third right sealing plate; The third ratchet disc is provided with a third radial protrusion, the third radial protrusion is provided with a through third pawl sliding groove, and one end of the third movable pawl is provided with a third pawl tooth; The third left cylinder mounting plate is rotatably connected to the third outer shell, the third right cylinder mounting plate is rotatably connected to the third outer shell, the third ratchet disc is inserted into the third notch and is rotatably connected to the third outer shell; the third left cylinder is fixedly connected to the third left cylinder mounting plate, the third right cylinder is fixedly connected to the third right cylinder mounting plate, the third left cylinder output end is fixed with the third left cylinder connecting block, the third right cylinder output end is fixed with the third right cylinder connecting block, the third left cylinder connecting block is connected to the third The third left connecting shaft is rotatably connected, the third right cylinder connecting block is rotatably connected to the third right connecting shaft, the third left connecting shaft is fixed on the third ratchet disk, the third right connecting shaft is fixed on the third ratchet disk, the third pawl cylinder is fixed on the third ratchet disk, the third movable pawl is fixed on the output end of the third pawl cylinder, the third movable pawl is slidably set in the third pawl slot, and the third pawl tooth can be connected or disconnected with the third ratchet tooth under the control of the third pawl cylinder, thereby realizing power transmission or disconnection.

11. A machine tool, characterized in that: It comprises a body and the pneumatic clamping device according to any one of claims 1 to 10.

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