A pneumatic quick-change jaw with no visible tube

Abstract

The present invention relates to the technical field of pneumatic vises, and the pneumatic quick-change jaws without exposed tubes include a mounting base, a supercharger is fixedly arranged on the left side of the mounting base, a pressure-maintaining mechanism for maintaining gas pressure is arranged on the rear side of the mounting base, a plurality of mounting grooves are evenly arranged on the top of the mounting base, and a base is fixedly connected to the top of the mounting base above the mounting grooves. The air duct of the present invention is an embedded design, which reduces the probability of air pipe rupture caused by collision compared with the traditional exposed tube design. Through the design of the pressure-maintaining mechanism, after the air pump supplies air to clamp the workpiece, the pressure-maintaining mechanism is used to maintain pressure. Compared with the continuous air supply method of the air pump, the air pressure output by the pressure-maintaining mechanism is stable, which ensures stable clamping of the workpiece and improves processing accuracy. Through the design of the quick-change mechanism, the fixing of the locking head assembly to the jaw body can be indirectly locked or loosened by turning the adjusting screw half a turn, thereby realizing rapid installation and disassembly of the jaw body.

Description

Technical Field

[0001] The invention belongs to the technical field of pneumatic vises, and in particular relates to a pneumatic quick-change jaw without an exposed tube. Background Art

[0002] A vise is a common hand tool widely used in machining, manufacturing, and repair industries. It is primarily used to secure workpieces for operations such as sawing, drilling, and grinding. Its robust clamping mechanism provides strong holding force, ensuring the workpiece remains stable during machining. Vises are categorized into different types based on their drive methods, with pneumatic vises being one such type. Existing pneumatic vises have the following issues when used:

[0003] 1. Pneumatic vises use air pressure as a driving force to clamp and fix workpieces, which requires air pipes to transport gas. Existing pneumatic vises have exposed pipes, which are prone to collision and damage, and have poor aesthetics.

[0004] 2. To ensure that the pneumatic vise can stably clamp the workpiece, the gas pressure needs to be stable. However, existing pneumatic vises are usually not equipped with a pressure-maintaining mechanism. Therefore, the air pump needs to be kept working at all times to achieve the effect of stable clamping of the workpiece. However, the air pressure of the air pump fluctuates and is not completely stable, which causes fluctuations in the clamping force and affects the machining accuracy of the workpiece.

[0005] 3. Different workpieces have different sizes and shapes, so different jaws need to be replaced according to different workpieces. However, the existing jaws are usually fixed with bolts, so when replacing them, multiple bolts need to be screwed, and each bolt needs to be screwed multiple times, which makes the installation and replacement efficiency low. Summary of the Invention

[0006] The purpose of the present invention is to provide a pneumatic quick-change jaw with a simple structure and reasonable design in order to solve the above problems.

[0007] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0008] A pneumatic quick-change jaw without an exposed tube includes a mounting base, a supercharger is fixed on the left side of the mounting base, a pressure maintaining mechanism for gas pressure maintenance is provided on the rear side of the mounting base, a plurality of mounting grooves are evenly opened on the top of the mounting base, a base is fixedly connected to the top of the mounting base, the base is located above the mounting grooves, a quick-change mechanism is provided on the base, and an air blowing dust removal mechanism for blowing and cleaning processing debris is provided on the front side of the base.

[0009] The pressure maintaining mechanism includes a main air channel opened in the middle of the interior of the mounting base plate, the main air channel is connected to the interior of the supercharger, a connecting air channel connected to the main air channel is opened on the right side of the interior of the mounting base plate, a pressure maintaining gas tank is fixedly installed on the rear side of the top of the mounting base plate, a connecting air pipe connected to the connecting air channel is fixedly connected to the right end of the pressure maintaining gas tank, and a pressure gauge is fixedly provided at the left end of the pressure maintaining gas tank.

[0010] Preferably, a piston slides through the center of the base, a number of fixed grooves are evenly arranged around the bottom of the base, and a booster spring is fixed inside each fixed groove, the bottom of the booster spring fits against the top of the piston, a sealing ring is provided between the piston and the base, there is a cavity between the top of the piston and the base, and the piston is located in the mounting groove.

[0011] Preferably, a fixed guide column is fixedly installed at the center of the top of the piston, a guide slider is sleeved on the top of the fixed guide column, the guide slider and the fixed guide column are fixedly connected by a retaining spring, and two No. 1 limiting grooves are symmetrically provided on the left and right of the guide slider.

[0012] Preferably, a number of connecting air channels No. 1, No. 2 and No. 3 are provided inside the installation base plate, and the No. 2 connecting air channel is connected to the main air channel, and a number of switching valves corresponding to the number of bases are fixedly installed on the top of the installation base plate, and the No. 2 connecting air channel is connected to the air inlet of the switching valve, and the two air outlets of the switching valve are respectively connected to the No. 1 connecting air channel and the No. 3 connecting air channel, a one-way valve is installed inside the No. 3 connecting air channel, and the No. 3 connecting air channel is connected to the cavity between the top of the piston and the base, and the No. 1 connecting air channel, the No. 2 connecting air channel and the No. 3 connecting air channel are fixedly installed with a plug at one end away from the center of the installation base plate, and the No. 1 connecting air channel is connected to the installation groove.

[0013] Preferably, the quick-change mechanism includes two movable slides that are symmetrically slidably connected to the top of the base, and both movable slides are provided with a No. 2 limit slide that matches the No. 1 limit slide. An adjusting screw is threadedly connected to the middle part of the inner part of the movable slide, the upper part of the adjusting screw is an inverted cone, and an accommodating hole is provided inside the movable slide, and a tightening pin is slidably connected inside the accommodating hole, one end of the tightening pin is provided with a No. 1 inclined surface that fits with the inverted cone surface on the adjusting screw, and the other end of the tightening pin is provided with two No. 2 inclined surfaces.

[0014] Preferably, two restoring springs are symmetrically installed on one side of the movable slide close to the center of the base, and a locking head assembly is provided on the top of the two restoring springs. Two movable pin assemblies that cooperate with the locking head assembly are symmetrically connected to the inside of the movable slide in a sliding manner.

[0015] Preferably, the movable pin assembly includes a movable pin body, a guide inclined groove matching the No. 2 inclined surface is provided at one end of the movable pin body, and a conical extrusion surface is provided at the other end of the movable pin body, and the locking head assembly includes a locking head body, a pressure conical surface matching the conical extrusion surface is provided on the outer wall of the locking head body, and the center of the pressure conical surface is located above the center of the conical extrusion surface, and a locking groove is provided on the top of the outer wall of the locking head body close to the center of the base.

[0016] Preferably, the jaw body is slidably inserted into the top of the movable slide, a clamping block matching the locking groove is provided at the bottom of the jaw body, a through hole is provided in the center of the jaw body, and the axis of the through hole coincides with the axis of the adjusting screw, two pressure plates are symmetrically fixedly connected to the top of the base front and back, and a fixed plate is fixedly connected to the middle of the two pressure plates, and a sealing gasket is provided between the fixed plate and the pressure plate.

[0017] Preferably, an exhaust valve is fixedly mounted on the front side of the base, and the exhaust valve is communicated with the cavity at the top of the piston.

[0018] Preferably, the air blowing dust removal mechanism includes a fixed cover sleeved on the outside of the exhaust valve, a sealing ring is provided between the fixed cover and the base, a telescopic tube is fixedly installed on the top of the fixed cover, the telescopic tube is connected to the inside of the fixed cover, and an air blowing pipe is fixedly installed on the top of the telescopic tube.

[0019] The beneficial effects of the present invention are:

[0020] 1. The present invention integrates multiple vises on a base plate, and with the embedded air duct design, it is convenient to clamp multiple workpieces simultaneously, which is convenient for large-scale processing. The air duct is embedded in the design, which is simpler and more beautiful than the traditional open pipe design. At the same time, it reduces the probability of air pipe rupture caused by collision and extends the service life of the equipment.

[0021] 2. The present invention adopts the design of a pressure-holding mechanism. After the air pump supplies air to clamp the workpiece, the pressure-holding mechanism is used to maintain the pressure. Compared with the method of continuous air supply by the air pump, the air pressure output by the pressure-holding mechanism is stable, which avoids the change of clamping force caused by air pressure fluctuation, ensures the stable clamping of the workpiece, and improves the processing accuracy.

[0022] 3. The present invention adopts the design of a quick-change mechanism. By turning the adjusting screw half a turn, the fixing of the locking head assembly to the jaw body can be indirectly locked or loosened, thereby realizing the rapid installation and disassembly of the jaw body. Compared with the traditional method of fixing with multiple screws, the replacement speed is faster, which indirectly improves the workpiece processing efficiency.

[0023] 4. The present invention adopts the design of an air blowing dust removal mechanism. When the vise is released from clamping, exhaust is required. The exhausted gas is transported to the workpiece under the guidance of the air blowing dust removal mechanism, thereby achieving the simultaneous cleaning of debris on the workpiece surface while exhausting and releasing the clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0025] Figure 2 It is a partial structural stereogram of the present invention;

[0026] Figure 3 It is a partial structural exploded view of the present invention;

[0027] Figure 4 The present invention Figure 3 A magnified schematic diagram of area A in the middle;

[0028] Figure 5 It is a partial cross-sectional view of the base, jaw body and quick-change mechanism of the present invention;

[0029] Figure 6 is a three-dimensional diagram of the base and quick-change mechanism of the present invention;

[0030] Figure 7 is a perspective view of the movable pin assembly and the locking head assembly of the present invention;

[0031] Figure 8 It is a three-dimensional diagram of the booster spring, piston, guide slider and fixed guide post of the present invention;

[0032] Figure 9 is a top sectional view of the mounting base plate and the pressure maintaining mechanism of the present invention;

[0033] Figure 10 It is a three-dimensional diagram of the air blowing dust removal mechanism of the present invention.

[0034] Figure: 1, mounting base; 2, base; 3, jaw body; 4, air blowing and dust removal mechanism; 41, fixed cover; 42, telescopic tube; 43, air blowing tube; 5, pressure maintaining mechanism; 51, pressure gauge; 52, pressure maintaining gas tank; 53, connecting air pipe; 54, connecting air channel; 55, main air channel; 6, quick change mechanism; 61, movable slide; 62, pressure plate; 63, sealing gasket; 64, adjusting screw; 65, tightening pin; 66, movable pin assembly; 661, movable pin body; 662, guide chute; 663, tapered Extrusion surface; 67, locking head assembly; 671, locking head body; 672, locking groove; 673, pressure cone; 68, return spring; 69, fixing plate; 7, booster; 8, plug; 9, switching valve; 10, mounting groove; 11, booster spring; 12, piston; 13, one-way valve; 14, exhaust valve; 15, guide slider; 16, fixed guide column; 17, connecting air duct No. 1; 18, connecting air duct No. 2; 19, connecting air duct No. 3; 20, limit slide No. 1; 21, limit slide No. 2. DETAILED DESCRIPTION

[0035] The present application is described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0036] Example: See Figure 1 and Figure 2 A pneumatic quick-change jaws without an exposed tube includes a mounting base 1, a booster 7 is fixedly provided on the left side of the mounting base 1, a pressure maintaining mechanism 5 is provided on the rear side of the mounting base 1, the pressure maintaining mechanism 5 can maintain gas pressure, a plurality of mounting grooves 10 are evenly opened on the top of the mounting base 1, a base 2 is fixedly installed on the top of the mounting base 1 above the mounting grooves 10, a quick-change mechanism 6 is provided on the base 2, and an air blowing dust removal mechanism 4 for blowing and cleaning processing debris is provided on the front side of the base 2.

[0037] When in use, the mounting base 1 is used for the integrated installation of the base 2, the pressure maintaining mechanism 5 is used to maintain the stability of the air pressure during stable clamping, and the air blowing and dust removal mechanism 4 is used to blow and clean the debris on the workpiece while exhausting the air.

[0038] See also Figure 2 、 Figure 3 、 Figure 5 and Figure 8 A piston 12 slides through the center of the base 2. A number of fixed grooves are evenly arranged around the bottom of the base 2, and a booster spring 11 is fixed inside each fixed groove. The bottom of the booster spring 11 fits against the top of the piston 12. A sealing ring is provided between the piston 12 and the base 2. There is a cavity between the top of the piston 12 and the base 2. A fixed guide post 16 is fixedly installed at the center of the top of the piston 12. A guide slider 15 is sleeved on the top of the fixed guide post 16. The guide slider 15 and the fixed guide post 16 are fixedly connected by a retaining spring. The retaining spring is used to fix the fixed guide post 16 and the guide slider 15 together. The booster spring 11 is used to increase the force of the downward movement of the piston 12, thereby increasing the clamping force on the workpiece.

[0039] See also Figure 1 、 Figure 2 and Figure 9 The pressure maintaining mechanism 5 includes a main air channel 55 opened in the middle of the interior of the mounting base plate 1, the main air channel 55 is connected to the interior of the supercharger 7, a connecting air channel 54 connected to the main air channel 55 is opened on the right side of the interior of the mounting base plate 1, and a pressure maintaining gas tank 52 is fixedly installed on the top rear side of the mounting base plate 1. The right end of the pressure maintaining gas tank 52 is fixedly connected to a connecting air pipe 53 connected to the connecting air channel 54, and a pressure gauge 51 is fixedly installed on the left end of the pressure maintaining gas tank 52.

[0040] Several connecting air channels 17, 18 and 19 are provided inside the mounting base plate 1. The connecting air channel 18 is connected to the main air channel 55. Several switching valves 9 are fixedly installed on the top of the mounting base plate 1, and the connecting air channel 18 is connected to the air inlet of the switching valve 9. The two air outlets of the switching valve 9 are respectively connected to the No. 1 connecting air channel 17 and the No. 3 connecting air channel 19. A one-way valve 13 is installed inside the No. 3 connecting air channel 19, and the No. 3 connecting air channel 19 is connected to the cavity between the top of the piston 12 and the base 2. The No. 1 connecting air channel 17, the No. 2 connecting air channel 18 and the No. 3 connecting air channel 19 are all fixedly provided with a plug 8 at one end away from the center of the mounting base plate 1. The No. 1 connecting air channel 17 is connected to the bottom area of ​​the piston 12. When in use, the switching valve 9 is used to open and close the No. 1 connecting air channel 17, the No. 2 connecting air channel 18 and the No. 3 connecting air channel 19 respectively.

[0041] When in use, the booster 7 is used to increase the pressure of the gas entering the main air channel 55, the main air channel 55 is used to transport the gas to the connecting air channel 54 and the second connecting air channel 18 respectively, the pressure maintaining gas tank 52 is used to store gas, and the pressure gauge 51 is used to display the gas pressure in the pressure maintaining gas tank 52.

[0042] See also Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 8 The quick-change mechanism 6 includes two movable slides 61 symmetrically slidably connected to the top of the base 2 on the left and right sides. Two No. 1 limit slides 20 are symmetrically provided on the guide slide 15 on the left and right sides. A No. 2 limit slide 21 that cooperates with the No. 1 limit slide 20 is provided on both movable slides 61, and a sealed sliding is formed between the guide slide 15 and the movable slide 61. An adjusting screw 64 is threadedly connected to the middle part of the inner part of the movable slide 61. The upper part of the adjusting screw 64 is an inverted cone, and an accommodating hole is provided inside the movable slide 61, and a locking pin 65 is slidably connected inside the accommodating hole. One end of the locking pin 65 is provided with a No. 1 inclined surface that fits the inverted cone surface on the adjusting screw 64, and the other end of the locking pin 65 is provided with two No. 2 inclined surfaces. Two return springs 68 are symmetrically installed on the side of the movable slide 61 near the center of the base 2. Locking head assemblies 67 are provided on the tops of the two return springs 68. Two movable pin assemblies 66 that cooperate with the locking head assembly 67 are symmetrically slidably connected inside the movable slide 61.

[0043] See also Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7The movable pin assembly 66 includes a movable pin body 661, one end of the movable pin body 661 is provided with a guide inclined groove 662 that matches the second inclined surface, and the other end of the movable pin body 661 is provided with a conical extrusion surface 663. The locking head assembly 67 includes a locking head body 671, and the outer wall of the locking head body 671 is provided with a pressure cone 673 that matches the conical extrusion surface 663, and the center of the pressure cone 673 is located above the center of the conical extrusion surface 663. The top of the outer wall of the locking head body 671 is close to the center of the base 2. A locking groove 672 is provided, and the jaw body 3 is slidably inserted into the top of the movable slide 61. A clamping block matching the locking groove 672 is provided at the bottom of the jaw body 3. A through hole is provided in the center of the jaw body 3, and the axis of the through hole coincides with the axis of the adjusting screw 64. Two pressure plates 62 are fixedly connected symmetrically front and back to the top of the base 2, and a fixed plate 69 is fixedly connected to the middle of the two pressure plates 62. A sealing gasket 63 is provided between the fixed plate 69 and the pressure plate 62, and the sealing gasket 63 is located above the guide slider 15 and the movable slide 61.

[0044] When in use, first connect the supercharger 7 to the air pump through a pipeline, use the air pump to transport the gas to the supercharger 7 through the pipeline, then the gas is pressurized by the supercharger 7 and transported to the main air channel 55, and then the gas enters the pressure-maintaining gas tank 52 through the connecting air channel 54 and the connecting air pipe 53. At the same time, the gas enters the switching valve 9 from the No. 2 connecting air channel 18, and the pressure-maintaining gas tank 52 is used to store the air pressure until the air pressure of the pressure gauge 51 reaches the specified reading, then turn off the supercharger 7 and the air pump, and at this time switch the switching valve 9 to the No. 1 connecting air channel. The air passage 17 is connected, and the gas enters the bottom of the piston 12 from the No. 1 connecting air passage 17, driving the piston 12 and the fixed guide column 16 thereon to move upward, synchronously compressing the booster spring 11, and at the same time driving the guide slider 15 to move upward, and through the limited sliding of the No. 1 limiting groove 20 on the guide slider 15 and the No. 2 limiting groove 21 on the movable slide 61, the two movable slides 61 are driven to move away from each other, and the jaw body 3 is synchronously driven to move away from each other, thereby realizing the opening of the jaw body 3. At this time, the workpiece to be clamped is placed in Between the two jaw bodies 3, at this time, the switching valve 9 is switched to the connected state of the No. 3 connecting air channel 19. At this time, the gas at the bottom of the piston 12 is discharged from the exhaust port on the switching valve 9. At the same time, the gas in the main air channel 55 enters the cavity at the upper end of the piston 12 through the No. 3 connecting air channel 19. A one-way valve 13 is provided on the No. 3 connecting air channel 19. The one-way valve 13 ensures that the gas flows from the main air channel 55 to the cavity at the upper end of the piston 12 in one direction, driving the piston 12 to move downward, and at the same time driving the fixed guide column 16 and the guide slider 15 thereon to move downward. The two movable slides 61 and the jaw bodies 3 thereon move synchronously to centering motion, and the jaw bodies 3 are used to stably clamp the workpiece. At the same time, the downward elastic force of the booster spring 11 further improves the stability of the clamping. After stable clamping, the pressure-maintaining gas stored in the pressure-maintaining gas tank 52 enters the cavity at the upper end of the piston 12 through the connecting air channel 54, the main air channel 55 and the No. 3 connecting air channel 19, thereby maintaining the stability of the clamping force of the jaw body 3 on the workpiece. Compared with the state of continuous pressure delivery by the air pump, the clamping force is more stable and has less fluctuation.

[0045] When it is necessary to replace the jaw body 3 of a different size and shape, the corresponding wrench is inserted through the through hole on the jaw body 3 into the corresponding hole on the top of the adjusting screw 64. In the locked state, the upper part of the inverted cone surface on the adjusting screw 64 fits with the No. 1 inclined surface of the locking pin 65, thereby squeezing the locking pin 65 toward the movable pin assembly 66. At this time, the adjusting screw 64 is rotated half a circle to drive the adjusting screw 64 to rotate upward, loosen the adjustment screw 64 from the locking pin 65, and then loosen the locking pin 65 from the movable pin assembly 66. At this time, under the action of the elastic force of the return spring 68, the locking head body 671 is driven to move upward, loosen the locking groove 672 on the locking head body 671 to lock the jaw body 3. At this time, the old jaw body 3 is removed, and then the new jaw body 3 is slid and inserted into the top of the movable slide 61, and then the adjusting screw 64 is rotated in the opposite direction to drive the adjusting screw 64 to move downward. The inverted conical surface on 4 squeezes the locking pin 65, driving the locking pin 65 to move toward the movable pin assembly 66, and the locking pin 65 squeezes the guide inclined groove 662 on the movable pin body 661 through the locking pin 65, driving the two movable pin bodies 661 to move away from each other. In the unlocked state, the conical extrusion surface 663 on the movable pin body 661 is in contact with the lower edge of the compressed conical surface 673, and the conical extrusion surface 663 on the movable pin body 661 is not concentric with the compressed conical surface 673. Therefore, under the extrusion of the conical extrusion surface 663, the locking head body 671 is driven to move downward until the conical extrusion surface 663 and the compressed conical surface 673 are in a concentric state. The jaw body 3 is locked by the downward pressure of the locking groove 672 on the locking head body 671, thereby realizing quick installation and disassembly of the jaw body 3. Compared with the traditional method of installing with multiple screws, only half a turn of a screw is needed to achieve locking and loosening, which has high work efficiency.

[0046] See also Figure 1 and Figure 10 An exhaust valve 14 is fixedly installed on the front side of the base 2, and the exhaust valve 14 is connected to the cavity at the top of the piston 12. The air blowing and dust removal mechanism 4 includes a fixed cover 41 that is sleeved on the outside of the exhaust valve 14. A sealing ring is provided between the fixed cover 41 and the base 2. A telescopic tube 42 is fixedly installed on the top of the fixed cover 41, and the telescopic tube 42 is connected to the inside of the fixed cover 41. An air blowing pipe 43 is fixedly installed on the top of the telescopic tube 42.

[0047] During use, when the workpiece processing is completed, the switching valve 9 is switched to the center state. At this time, the No. 1 connecting air channel 17 and the No. 3 connecting air channel 19 are both in the closed state. The exhaust valve 14 is an electric valve. At this time, the exhaust valve 14 is opened to discharge the gas in the cavity at the top of the piston 12 through the exhaust valve 14. The gas passes through the fixed cover 41 and enters the telescopic tube 42, and is then ejected through the blowing pipe 43. The ejected gas cleans the surface of the workpiece, and no subsequent manual cleaning is required, which saves time and effort, and realizes the reuse of the exhaust gas, saving energy consumption.

[0048] It should be noted that, when using this type of pneumatic quick-change jaws without an exposed tube, the gas is first transported to the booster 7 by an air pump, and the gas is pressurized by the booster 7. The pressurized gas is transported to the pressure-maintaining mechanism 5 for storage, and the pressure value of the gas in the pressure-maintaining gas tank 52 is observed by the pressure gauge 51 in the pressure-maintaining mechanism 5. When the pressure reaches the specified value, the switching valve 9 is switched to the state where the No. 1 connecting air channel 17 is connected. At this time, the gas enters the bottom of the piston 12 from the No. 1 connecting air channel 17, pushing the piston 12 upward, indirectly driving the jaw body 3 to move away from each other. At this time, the workpiece to be clamped is placed between the two jaw bodies 3, and the switching valve 9 is switched to the conductive state of the No. 3 connecting air channel 19, and a one-way valve 13 is provided in the No. 3 connecting air channel 19, so that the gas enters the cavity at the top of the piston 12 in one direction, pushing the piston 12 downward, indirectly driving the jaw body 3 to move away from each other. It drives the two jaw bodies 3 to align and clamp, thereby achieving stable clamping of the workpiece, and multiple vises are integrated on the mounting base 1. The multiple vises are synchronously loosened and clamped by gas, which is convenient for synchronous clamping and loosening of multiple workpieces at one time, with high work efficiency. When the processing is completed and exhaust is required, the switching valve 9 is switched to the centered state. At this time, the No. 1 connecting air channel 17 and the No. 3 connecting air channel 19 are both in the closed state. At this time, the exhaust valve 14 is opened, and the gas in the cavity at the top of the piston 12 is discharged through the exhaust valve 14. The gas passes through the fixed cover 41 and enters the telescopic tube 42, and is then ejected through the blow pipe 43. The ejected gas cleans the surface of the workpiece. At the same time, the jaw body 3 can be quickly replaced through the quick-change mechanism 6. Compared with the traditional method of installing with multiple screws, only half a turn of a screw is needed to achieve locking and loosening, with high work efficiency.

[0049] The above-described embodiments merely illustrate several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A pneumatic quick-change jaw without an exposed tube, comprising a mounting base (1), characterized in that: A supercharger (7) is fixed on the left side of the mounting base plate (1), a pressure maintaining mechanism (5) for maintaining gas pressure is provided on the rear side of the mounting base plate (1), a plurality of mounting grooves (10) are evenly provided on the top of the mounting base plate (1), a base (2) is fixedly connected to the top of the mounting base plate (1), the base (2) is located above the mounting grooves (10), a quick change mechanism (6) is provided on the base (2), and an air blowing dust removal mechanism (4) for blowing and cleaning processing debris is provided on the front side of the base (2); The pressure-maintaining mechanism (5) comprises a main air passage (55) provided in the middle of the interior of the mounting base plate (1), the main air passage (55) being in communication with the interior of the supercharger (7), a connecting air passage (54) in communication with the main air passage (55) being provided on the right side of the interior of the mounting base plate (1), a pressure-maintaining gas tank (52) being fixedly installed on the top rear side of the mounting base plate (1), a connecting air pipe (53) in communication with the connecting air passage (54) being fixedly connected to the right end of the pressure-maintaining gas tank (52), and a pressure gauge (51) being fixedly provided on the left end of the pressure-maintaining gas tank (52); A piston (12) is slidably passed through the center of the inner portion of the base (2), and a plurality of fixed grooves are evenly arranged around the bottom of the base (2), and a pressure-boosting spring (11) is fixed inside each fixed groove, and the bottom of the pressure-boosting spring (11) is fitted with the top of the piston (12), and a sealing ring is arranged between the piston (12) and the base (2). There is a cavity between the top of the piston (12) and the base (2), and the piston (12) is located in the mounting groove (10), and a fixed guide column (16) is fixedly installed at the center of the top of the piston (12), and a guide slider (15) is sleeved on the top of the fixed guide column (16), and the guide slider (15) and the fixed guide column (16) are fixedly connected by a retaining spring, and two No. 1 limiting slots (20) are symmetrically arranged on the left and right of the guide slider (15); The installation base plate (1) is provided with a plurality of No. 1 communicating air passages (17), No. 2 communicating air passages (18) and No. 3 communicating air passages (19), wherein the No. 2 communicating air passages (18) are connected to the main air passage (55), and a plurality of switching valves (9) corresponding in number to the number of the bases (2) are fixedly installed on the top of the installation base plate (1), wherein the No. 2 communicating air passages (18) are connected to the air inlets of the switching valves (9), and the two air outlets of the switching valves (9) are connected to the No. 1 communicating air passages (17) and the main air passages (55). ) is connected to the No. 3 communicating air channel (19), a one-way valve (13) is installed inside the No. 3 communicating air channel (19), and the No. 3 communicating air channel (19) is connected to the cavity between the top of the piston (12) and the base (2), and the No. 1 communicating air channel (17), the No. 2 communicating air channel (18) and the No. 3 communicating air channel (19) are fixedly installed with a plug (8) at one end away from the center of the installation base plate (1), and the No. 1 communicating air channel (17) is connected to the installation groove (10); The quick-change mechanism (6) comprises two movable slides (61) symmetrically connected to the top of the base (2) in a sliding manner, and both movable slides (61) are provided with a second limiting slide (21) matched with the first limiting slide (20), an adjusting screw (64) is threadedly connected to the middle part of the movable slide (61), the upper part of the adjusting screw (64) is inverted cone shape, and a receiving hole is provided in the movable slide (61), and a tightening pin (65) is slidably connected in the receiving hole, one end of the tightening pin (65) is provided with a first inclined surface that fits the inverted cone surface on the adjusting screw (64), and the other end of the tightening pin (65) is provided with two second inclined surfaces.

2. The pneumatic quick-change jaws without exposed tube according to claim 1, characterized in that: Two restoring springs (68) are symmetrically installed on one side of the movable slide (61) close to the center of the base (2), and a locking head assembly (67) is provided on the top of each of the two restoring springs (68). Two movable pin assemblies (66) that cooperate with the locking head assembly (67) are symmetrically slidably connected inside the movable slide (61).

3. The pneumatic quick-change jaws without exposed tube according to claim 2, characterized in that: The movable pin assembly (66) includes a movable pin body (661), one end of the movable pin body (661) is provided with a guide inclined groove (662) that matches the second inclined surface, and the other end of the movable pin body (661) is provided with a conical extrusion surface (663), the locking head assembly (67) includes a locking head body (671), the outer wall of the locking head body (671) is provided with a pressure conical surface (673) that matches the conical extrusion surface (663), and the center of the pressure conical surface (673) is located above the center of the conical extrusion surface (663), and the top of the outer wall of the locking head body (671) close to the center of the base (2) is provided with a locking groove (672).

4. The pneumatic quick-change jaws without exposed tubes according to claim 3, characterized in that: The top of the movable slide (61) is slidably connected to the jaw body (3), and the bottom of the jaw body (3) is provided with a clamping block that matches the locking groove (672). A through hole is provided in the center of the jaw body (3), and the axis of the through hole coincides with the axis of the adjusting screw (64). Two pressure plates (62) are fixedly connected symmetrically in front and back at the top of the base (2), and a fixed plate (69) is fixedly connected to the middle of the two pressure plates (62). A sealing gasket (63) is provided between the fixed plate (69) and the pressure plate (62).

5. The pneumatic quick-change jaws without exposed tube according to claim 1, characterized in that: An exhaust valve (14) is fixedly mounted on the front side of the base (2), and the exhaust valve (14) is communicated with the cavity at the top of the piston (12).

6. The pneumatic quick-change jaws without exposed tube according to claim 5, characterized in that: The air blowing dust removal mechanism (4) comprises a fixed cover (41) sleeved on the outside of the exhaust valve (14), a sealing ring is provided between the fixed cover (41) and the base (2), a telescopic tube (42) is fixedly installed on the top of the fixed cover (41), the telescopic tube (42) is communicated with the interior of the fixed cover (41), and an air blowing pipe (43) is fixedly installed on the top of the telescopic tube (42).

Images