A large space variable displacement pump

Abstract

The present invention discloses a large-space variable displacement pump, which belongs to the technical field of variable displacement pumps and includes a main body device, the main body device is used to adjust the capacity of the pump, a pump body device is provided on the main body device, the pump body device is used for air intake and exhaust, a piston device is provided on the main body device, the piston device is used to squeeze the gas in the pump body device, and an adjustment device is provided on the pump body device, the adjustment device is used to adjust the use capacity of the pump. The main body device provided by the present invention drives the pump body device and the adjustment device to operate synchronously, adjusts the cavity capacity of the pump body, and adjusts the working mode of the pump through the adjustment device. When the lifting block is located below the lower left plate and the lower right plate, it is a large-capacity constant-volume mode; when the lifting block is located above the upper left plate and the upper right plate, it is a small-capacity constant-volume mode; when the lifting block is located between the upper left plate, the upper right plate and the lower left plate, the lower right plate, it is a variable-volume mode; multi-mode switching makes the application range of the pump wider.

Description

Technical Field

[0001] The present invention relates to the technical field of variable displacement pumps, in particular to a large-space variable displacement pump. Background Art

[0002] A vacuum pump is a device that uses various methods to improve, generate, and maintain a vacuum in a closed space. In recent years, with the continued rapid development of my country's economy, downstream application industries related to vacuum pumps have maintained a rapid growth momentum. The development of vacuum applications has gradually shifted towards variable volume. As the pressure range requirements for vacuum technology in production become increasingly broad, no single type of vacuum pump can be fully applicable to all operating pressure ranges. Different types of vacuum pumps can only be used according to different operating pressure ranges and different working requirements. For ease of use and to meet the needs of various vacuum processes, variable volume vacuum pumps have a promising market prospect. Chinese invention patent publication number CN107218212A discloses a variable volume pump. This prior art utilizes oil pressure to push a slider, thereby changing the volume. However, this device utilizes a medium for conversion, which has certain limitations and instability in a wide range of applications. Furthermore, it cannot perform variable volume operation, and the switching process is cumbersome. Summary of the Invention

[0003] In response to the above technical problems, the technical solution adopted by the present invention is: a large-space variable capacity pump, including a main body device, the main body device including a main frame, the main body device is used to adjust the capacity of the pump, the main body device is provided with a pump body device, the pump body device includes a pump body, the pump body is fixedly mounted on the main frame, the pump body device is used for air intake and exhaust, the main body device is provided with a piston device, the piston device includes a pump motor, the pump motor is fixedly mounted on the main frame, the piston device is used to squeeze the gas in the pump body device, the pump body device is provided with an adjustment device, the adjustment device includes a lifting block, the lifting block is slidably mounted with the pump body, and the adjustment device is used to adjust the use capacity of the pump.

[0004] The piston device drives the pump body device to take in and out air, the main device can realize variable volume action, and the adjustment device can adjust the use mode of the pump, namely variable volume, small volume constant volume and large volume constant volume.

[0005] Furthermore, the main device includes a long shaft rotatably mounted on the main frame, a top bevel gear is fixedly mounted on the long shaft, a vertical shaft is rotatably mounted on the main frame, a side bevel gear is fixedly mounted on the vertical shaft, the top bevel gear meshes with the side bevel gear, a bottom gear is fixedly mounted on the bottom of the vertical shaft, an inner shaft is rotatably mounted on the main frame, an inner half gear and an inner bottom gear are fixedly mounted on the inner shaft, an outer shaft is rotatably mounted on the main frame, an outer bottom gear and the outer shaft are fixedly mounted on the outer shaft, and the inner bottom gear meshes with the bottom gear. The bottom gear is meshed with the outer bottom gear, and the side slide rails are fixedly installed on the main frame. The two-sided rack rods are slidably installed on the side slide rails. The two-sided rack rods are meshed with the inner shaft, and the two-sided rack rods are meshed with the outer half gear. A pull rod is rotatably installed on the two-sided rack rods, and a rotating block is slidably installed on the pull rod. A rod spring is provided between the rotating block and the pull rod. A screw rod is rotatably installed on the main frame, and an internal thread block is rotatably installed on the rotating block. The internal thread block and the screw rod form a threaded transmission, and a lifting plate is fixedly installed on the internal thread block.

[0006] The rotation of the long shaft drives the top bevel gear to rotate, which in turn drives the vertical shaft to rotate through the side bevel gear, which in turn drives the inner bottom gear and outer bottom gear to rotate through the bottom gear, which in turn drives the inner half gear and outer half gear to rotate, which in turn drives the rack rods on both sides to slide back and forth along the side slide rails, which in turn drives the pull rod and the rotating block to rotate, which in turn drives the internal thread block and the lifting plate to rise and fall, which in turn drives the screw to rotate, and the capacity of the pump is adjusted by raising and lowering the lifting plate.

[0007] Furthermore, the pump body device includes a piston port arranged on the side of the pump body, a pump top cover is fixedly installed on the pump body, a screw plate and a lifting slide are fixedly installed on the side of the pump body, the screw plate and the screw are rotatably installed, a pump bottom cover is fixedly installed on the bottom of the pump body, an air outlet sleeve is fixedly installed on the top of the pump body, an air inlet sleeve is slidably installed on the bottom of the pump body, the air inlet sleeve is fixedly installed on the lifting plate, a variable capacity plate is fixedly installed on the air inlet sleeve, a sealing ring is fixedly installed on the outside of the variable capacity plate, the sealing ring is slidably installed on the inner wall of the pump body, an outlet pipe is fixedly installed on the air outlet sleeve, a pump chamber is fixedly installed on the outlet pipe, an outlet pipe is fixedly installed on the pump chamber, an air outlet mechanism is arranged in the air outlet sleeve, and an air inlet mechanism is arranged in the air inlet sleeve.

[0008] Furthermore, the air outlet mechanism includes a fixed plate fixedly mounted on the pump body, an inner sleeve fixedly mounted on the fixed plate, a top sliding column slidably mounted in the air outlet sleeve, a one-way ball fixedly mounted on the top sliding column, a top ball spring is provided between the one-way ball and the air outlet sleeve, and the one-way ball is slidably mounted on the inner sleeve.

[0009] Furthermore, the air intake mechanism includes an outer slide fixedly mounted on the variable capacity plate, an inner slide column is slidably mounted in the outer slide, a bottom one-way ball is fixedly mounted on the inner slide column, and a bottom ball spring is provided between the bottom one-way ball and the variable capacity plate.

[0010] When the piston device moves, it drives gas to enter from the air inlet sleeve. The gas will impact the bottom one-way ball, causing the inner sliding column to slide in the outer sliding cylinder, the bottom ball spring is compressed, and the gas enters the pump body through the variable capacity plate. The gas impacts the one-way ball through the inner sleeve, causing the top sliding column to slide in the air outlet sleeve, the top ball spring is squeezed, and the gas enters the outlet pipe through the air outlet sleeve, passes through the pump chamber, and is finally discharged through the outlet pipe.

[0011] The lifting of the lifting plate drives the lifting of the air inlet sleeve and the variable capacity plate, thereby adjusting the capacity of the inner cavity of the pump body to achieve variable capacity, and the sealing ring seals the inner cavity.

[0012] Furthermore, the piston device includes a pump casing fixedly mounted on the main frame, a long shaft rotatably mounted on the pump casing, a motor wheel fixedly mounted on the motor shaft of the pump motor, a transmission wheel fixedly mounted on the long shaft, a transmission belt wrapped around the motor wheel and the transmission wheel, a cam fixedly mounted on the long shaft, a cam connecting rod rotatably mounted on the cam, a piston rod rotatably mounted on the cam connecting rod, the piston rod and the pump casing are slidably mounted, a pipe sleeve fixedly mounted on the pump motor, the piston rod and the pipe sleeve slidably mounted, an inner sealing ring fixedly mounted in the pipe sleeve, the pipe sleeve is fixedly mounted on the piston mouth, an upper piston block fixedly mounted on the piston rod, an upper sealing ring fixedly mounted on the upper piston block, a lower piston block slidably mounted on the upper piston block, a lower sealing ring fixedly mounted on the lower piston block, and an inner spring is arranged between the lower piston block and the upper piston block.

[0013] The pump motor rotates, driving the transmission wheel through the transmission belt, thereby driving the long shaft to rotate, thereby driving the cam to rotate. The rotation of the cam drives the cam connecting rod to rotate, thereby driving the piston rod to slide in the pipe sleeve. The inner sealing ring makes the pump body airtight, thereby driving the upper piston block and the lower piston block to slide in the inner cavity of 291, doing work on the gas.

[0014] As the lifting plate rises, the variable capacity plate will rise, thereby driving the lower piston block to slide along the upper piston block, and the inner spring will be squeezed, so that the piston adapts to the size of the inner cavity of the pump body.

[0015] Furthermore, the adjusting device includes a protruding clamping block fixedly mounted on the lifting block, the lifting block and the screw rod form a threaded transmission, the lifting block and the lifting rail are slidably mounted, a locking electric cylinder is fixedly mounted on the pump body, a left locking plate is fixedly mounted on the top of the locking electric cylinder, the left locking plate is slidably mounted on the pump body, a right locking plate is slidably mounted on the pump body, and a bottom rotating gear and a top rotating gear are rotatably mounted on the pump body.

[0016] Furthermore, the left locking plate is provided with upper bottom teeth and lower top teeth, the right locking plate is provided with lower bottom teeth and upper top teeth, the upper bottom teeth are engaged with the bottom rotating gear, the lower bottom teeth are engaged with the bottom rotating gear, the lower top teeth are engaged with the top rotating gear, and the upper top teeth are engaged with the top rotating gear. The left locking plate is provided with an upper left plate and a lower left plate, and the right locking plate is provided with an upper right plate and a lower right plate.

[0017] The rotation of the screw will drive the lifting block to slide along the lifting slide rail, and the contraction of the locking electric cylinder will drive the left locking plate to slide on the pump body, thereby driving the bottom rotating gear and the top rotating gear to rotate through the upper bottom teeth and the lower top teeth, thereby driving the upper top teeth and the lower bottom teeth to move, thereby driving the right locking plate to slide outward along the pump body. At this time, the lower left plate and the lower right plate no longer block the extension of the locking block. By adjusting the position of the lifting block, different usage modes can be adjusted. After the mode adjustment is completed, the locking electric cylinder extends.

[0018] Since the screw rod and the lifting plate move synchronously, when the lifting plate rises, it will drive the screw rod to rotate, thereby driving the lifting block to rise. When the lifting block is located below the lower left plate and the lower right plate, the lifting block is stuck by the lower left plate, the lower right plate and the screw plate. At this time, the volume of the inner cavity of the pump body is the largest, which is a large-capacity constant-volume mode; when the lifting block is located above the upper left plate and the upper right plate, the lifting block is stuck by the upper left plate, the upper right plate and the screw plate. At this time, the volume of the inner cavity of the pump body is the smallest, which is a small-capacity constant-volume mode; when the lifting block is located between the upper left plate, the upper right plate and the lower left plate, the lower right plate, the lifting block can move up and down, which is a variable-volume mode.

[0019] When in constant volume mode, since the lifting block cannot move, the screw rod cannot rotate and the lifting plate cannot be lifted or lowered, that is, the internal thread block cannot be lifted or lowered, and the sliding of the rack rods on both sides cannot drive the internal thread block to lift or lower, and can only stretch the rod spring.

[0020] Compared with the prior art, the present invention has the following beneficial effects: (1) the main body device provided in the present invention drives the pump body device and the regulating device to operate synchronously, adjusts the cavity capacity of the pump body, and adjusts the working mode of the pump through the regulating device. When the lifting block is located below the lower left plate and the lower right plate, it is in the large-capacity fixed-volume mode; when the lifting block is located above the upper left plate and the upper right plate, it is in the small-capacity fixed-volume mode; when the lifting block is located between the upper left plate, the upper right plate and the lower left plate, the lower right plate, it is in the variable-volume mode; multi-mode switching makes the pump more applicable; (2) the piston device provided in the present invention changes synchronously according to the size of the pump body cavity, and is provided with multiple sealing rings, so that the piston operation efficiency is higher; (3) the air intake mechanism and the air outlet mechanism provided in the pump body device provided in the present invention can make the air intake and air outlet only one-way. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 .

[0022] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 .

[0023] Figure 3 Schematic diagram of the main device structure of the present invention Figure 1 .

[0024] Figure 4 Schematic diagram of the main device structure of the present invention Figure 2 .

[0025] Figure 5 It is a schematic structural diagram of the pump body device of the present invention.

[0026] Figure 6 It is a schematic diagram of the internal structure of the pump body device of the present invention.

[0027] Figure 7 Schematic diagram of the piston device structure of the present invention Figure 1 .

[0028] Figure 8 Schematic diagram of the piston device structure of the present invention Figure 2 .

[0029] Figure 9 Schematic diagram of the structure of the regulating device of the present invention Figure 1 .

[0030] Figure 10 Schematic diagram of the structure of the regulating device of the present invention Figure 2 .

[0031] Reference numerals: 101-main frame; 102-long shaft; 103-top bevel gear; 104-side bevel gear; 105-vertical shaft; 106-bottom gear; 107-inner half gear; 108-inner shaft; 109-inner bottom gear; 110-outer bottom gear; 111-outer shaft; 112-outer half gear; 113-two-sided rack rod; 114-pull rod; 115-side slide rail; 116-rod spring; 117-rotating block; 118-inner screw Block; 119-screw; 120-lifting plate; 201-pump body; 202-piston port; 203-pump top cover; 204-outlet pipe; 205-screw plate; 206-lifting slide rail; 207-pump bottom cover; 208-pump chamber; 209-outlet pipe; 210-air outlet sleeve; 211-air inlet sleeve; 212-fixed plate; 213-inner sleeve; 214-one-way ball; 215-top slide column; 216-top ball spring; 217- Capacitive plate; 218-seal ring; 219-outer slide; 220-inner slide column; 221-bottom one-way ball; 222-bottom ball spring; 301-pump motor; 302-pump housing; 303-drive belt; 304-motor pulley; 305-drive pulley; 306-cam; 307-cam connecting rod; 308-piston rod; 309-inner seal ring; 310-pipe sleeve; 311-upper piston block; 312-upper seal ring; 313-inner spring; 314-lower piston block; 315-lower sealing ring; 401-lifting block; 402-extending clamping block; 403-locking electric cylinder; 404-left clamping plate; 4041-upper bottom gear; 4042-lower top gear; 4043-left upper plate; 4044-left lower plate; 405-bottom rotating gear; 406-right clamping plate; 4061-lower bottom gear; 4062-upper top gear; 4063-right upper plate; 4064-right lower plate; 407-top rotating gear. DETAILED DESCRIPTION

[0032] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0033] Example: Reference Figures 1-10 A large-space variable displacement pump includes a main body device, the main body device includes a main frame 101, the main body device is used to adjust the capacity of the pump, the main body device is provided with a pump body device, the pump body device includes a pump body 201, the pump body 201 is fixedly mounted on the main frame 101, the pump body device is used for air intake and exhaust, the main body device is provided with a piston device, the piston device includes a pump motor 301, the pump motor 301 is fixedly mounted on the main frame 101, the piston device is used to squeeze the gas in the pump body device, the pump body device is provided with an adjusting device, the adjusting device includes a lifting block 401, the lifting block 401 is slidably mounted with the pump body 201, and the adjusting device is used to adjust the use capacity of the pump.

[0034] The piston device drives the pump body device to take in and out air, the main device can realize variable volume action, and the adjustment device can adjust the use mode of the pump, namely variable volume, small volume constant volume and large volume constant volume.

[0035] like Figure 3 、 Figure 4 As shown, the main device includes a long shaft 102 rotatably mounted on the main frame 101, a top bevel gear 103 is fixedly mounted on the long shaft 102, a vertical shaft 105 is rotatably mounted on the main frame 101, a side bevel gear 104 is fixedly mounted on the vertical shaft 105, the top bevel gear 103 is meshed with the side bevel gear 104, a bottom gear 106 is fixedly mounted on the bottom of the vertical shaft 105, an inner shaft 108 is rotatably mounted on the main frame 101, an inner half gear 107 and an inner bottom gear 109 are fixedly mounted on the inner shaft 108, an outer shaft 111 is rotatably mounted on the main frame 101, an outer bottom gear 110 and an outer shaft 111 are fixedly mounted on the outer shaft 111, the inner bottom gear 109 is meshed with the bottom gear 106, and the bottom gear 108 is meshed with the bottom gear 106. The wheel 106 is engaged with the outer bottom gear 110, and the side slide rail 115 is fixedly installed on the main frame 101. The double-sided rack rod 113 is slidably installed on the side slide rail 115. The double-sided rack rod 113 is engaged with the inner shaft 108, and the double-sided rack rod 113 is engaged with the outer half gear 112. A pull rod 114 is rotatably installed on the double-sided rack rod 113, and a rotating block 117 is slidably installed on the pull rod 114. A rod spring 116 is provided between the rotating block 117 and the pull rod 114, and a screw rod 119 is rotatably installed on the main frame 101. An internal thread block 118 is rotatably installed on the rotating block 117. The internal thread block 118 and the screw rod 119 form a threaded transmission, and a lifting plate 120 is fixedly installed on the internal thread block 118.

[0036] The rotation of the long shaft 102 drives the top bevel gear 103 to rotate, thereby driving the vertical shaft 105 to rotate through the side bevel gear 104, thereby driving the inner bottom gear 109 and the outer bottom gear 110 to rotate through the bottom gear 106, thereby driving the inner half gear 107 and the outer half gear 112 to rotate, thereby driving the two-sided rack rod 113 to slide back and forth along the side slide rail 115, thereby driving the pull rod 114 and the rotating block 117 to rotate, thereby driving the internal thread block 118 and the lifting plate 120 to rise and fall, driving the screw 119 to rotate, and adjusting the capacity of the pump by lifting the lifting plate 120.

[0037] like Figure 5 、 Figure 6As shown, the pump body device includes a piston port 202 arranged on the side of the pump body 201, a pump top cover 203 is fixedly installed on the pump body 201, a screw plate 205 and a lifting slide 206 are fixedly installed on the side of the pump body 201, the screw plate 205 is rotatably installed with the screw 119, a pump bottom cover 207 is fixedly installed at the bottom of the pump body 201, an air outlet sleeve 210 is fixedly installed on the top of the pump body 201, and an air inlet sleeve 211 is slidably installed at the bottom of the pump body 201. It is fixedly installed with the lifting plate 120, and a variable-capacity plate 217 is fixedly installed on the air inlet sleeve 211. A sealing ring 218 is fixedly installed outside the variable-capacity plate 217. The sealing ring 218 is slidably installed with the inner wall of the pump body 201. An outlet pipe 204 is fixedly installed on the air outlet sleeve 210, a pump chamber 208 is fixedly installed on the outlet pipe 204, and an outlet pipe 209 is fixedly installed on the pump chamber 208. An air outlet mechanism is provided in the air outlet sleeve 210, and an air intake mechanism is provided in the air inlet sleeve 211.

[0038] like Figure 6 As shown, the air outlet mechanism includes a fixed plate 212 fixedly mounted on the pump body 201, an inner sleeve 213 fixedly mounted on the fixed plate 212, a top sliding column 215 slidably mounted in the air outlet sleeve 210, a one-way ball 214 fixedly mounted on the top sliding column 215, a top ball spring 216 is provided between the one-way ball 214 and the air outlet sleeve 210, and the one-way ball 214 is slidably mounted on the inner sleeve 213.

[0039] like Figure 6 As shown, the air intake mechanism includes an outer slide 219 fixedly mounted on the variable capacity plate 217, an inner slide 220 is slidably mounted in the outer slide 219, a bottom one-way ball 221 is fixedly mounted on the inner slide 220, and a bottom ball spring 222 is provided between the bottom one-way ball 221 and the variable capacity plate 217.

[0040] When the piston device moves, it drives gas to enter from the air inlet sleeve 211. The gas will impact the bottom one-way ball 221, causing the inner sliding column 220 to slide in the outer sliding cylinder 219, and the bottom ball spring 222 is compressed. The gas enters the pump body 201 through the variable capacity plate 217. The gas impacts the one-way ball 214 through the inner sleeve 213, causing the top sliding column 215 to slide in the air outlet sleeve 210, and the top ball spring 216 is squeezed. The gas enters the outlet pipe 204 through the air outlet sleeve 210, passes through the pump chamber 208, and is finally discharged through the outlet pipe 209.

[0041] The lifting of the lifting plate 120 drives the lifting of the air inlet sleeve 211 and the variable capacity plate 217, thereby adjusting the capacity of the inner cavity of the pump body 201 to achieve variable capacity, and the sealing ring 218 seals the inner cavity.

[0042] like Figure 7 、 Figure 8As shown, the piston device includes a pump housing 302 fixedly mounted on the main frame 101, the long shaft 102 is rotatably mounted on the pump housing 302, a motor wheel 304 is fixedly mounted on the motor shaft of the pump motor 301, a transmission wheel 305 is fixedly mounted on the long shaft 102, a transmission belt 303 is wrapped around the motor wheel 304 and the transmission wheel 305, a cam 306 is fixedly mounted on the long shaft 102, a cam connecting rod 307 is rotatably mounted on the cam 306, a piston rod 308 is rotatably mounted on the cam connecting rod 307, and the piston rod 308 is slidably mounted on the pump housing 302. A sleeve 310 is fixedly mounted on the pump motor 301, the piston rod 308 is slidably mounted on the sleeve 310, an inner sealing ring 309 is fixedly mounted inside the sleeve 310, the sleeve 310 is fixedly mounted on the piston mouth 202, an upper piston block 311 is fixedly mounted on the piston rod 308, an upper sealing ring 312 is fixedly mounted on the upper piston block 311, a lower piston block 314 is slidably mounted on the upper piston block 311, a lower sealing ring 315 is fixedly mounted on the lower piston block 314, and an inner spring 313 is provided between the lower piston block 314 and the upper piston block 311.

[0043] The pump motor 301 rotates through the transmission belt 303 to drive the transmission wheel 305 to rotate, thereby driving the long shaft 102 to rotate, thereby driving the cam 306 to rotate. The rotation of the cam 306 drives the cam connecting rod 307 to rotate, thereby driving the piston rod 308 to slide in the sleeve 310. The inner sealing ring 309 ensures that the pump body 201 remains airtight, thereby driving the upper piston block 311 and the lower piston block 314 to slide in the inner cavity of 291 to perform work on the gas.

[0044] As the lifting plate 120 rises, the variable capacitance plate 217 rises, thereby driving the lower piston block 314 to slide along the upper piston block 311, and the inner spring 313 is squeezed, so that the piston adapts to the size of the inner cavity of the pump body 201.

[0045] like Figure 9 、 Figure 10 As shown, the adjusting device includes a protruding clamping block 402 fixedly mounted on the lifting block 401, the lifting block 401 and the screw rod 119 form a threaded transmission, the lifting block 401 and the lifting slide rail 206 are slidably mounted, a locking electric cylinder 403 is fixedly mounted on the pump body 201, a left locking plate 404 is fixedly mounted on the top of the locking electric cylinder 403, the left locking plate 404 is slidably mounted on the pump body 201, a right locking plate 406 is slidably mounted on the pump body 201, and a bottom rotating gear 405 and a top rotating gear 407 are rotatably mounted on the pump body 201.

[0046] like Figure 10As shown, the left locking plate 404 is provided with an upper bottom tooth 4041 and a lower top tooth 4042, and the right locking plate 406 is provided with a lower bottom tooth 4061 and an upper top tooth 4062, the upper bottom tooth 4041 is engaged with the bottom rotating gear 405, the lower bottom tooth 4061 is engaged with the bottom rotating gear 405, the lower top tooth 4042 is engaged with the top rotating gear 407, and the upper top tooth 4062 is engaged with the top rotating gear 407, the left locking plate 404 is provided with a left upper plate 4043 and a left lower plate 4044, and the right locking plate 406 is provided with a right upper plate 4063 and a right lower plate 4064.

[0047] The rotation of the screw rod 119 will drive the lifting block 401 to slide along the lifting slide rail 206, and the contraction of the locking electric cylinder 403 will drive the left locking plate 404 to slide on the pump body 201, thereby driving the bottom rotating gear 405 and the top rotating gear 407 to rotate through the upper bottom tooth 4041 and the lower top tooth 4042, thereby driving the upper top tooth 4062 and the lower bottom tooth 4061 to move, thereby driving the right locking plate 406 to slide outward along the pump body 201. At this time, the lower left plate 4044 and the lower right plate 4064 no longer block the protruding block 402. By adjusting the position of the lifting block 401, different usage modes can be adjusted. After the mode adjustment is completed, the locking electric cylinder 403 extends.

[0048] Since the screw rod 119 moves synchronously with the lifting plate 120, when the lifting plate 120 rises, it will drive the screw rod 119 to rotate, thereby driving the lifting block 401 to rise. When the lifting block 401 is located below the lower left plate 4044 and the lower right plate 4064, the lifting block 401 is stuck by the lower left plate 4044, the lower right plate 4064 and the screw plate 205. At this time, the volume of the cavity in the pump body 201 is the largest, which is a large-capacity constant-volume mode; when the lifting plate 120 rises, the screw rod 119 will rotate, thereby driving the lifting block 401 to rise. The lowering block 401 is located above the upper left plate 4043 and the upper right plate 4063, and the lifting block 401 is stuck by the upper left plate 4043, the upper right plate 4063 and the screw plate 205. At this time, the inner cavity volume of the pump body 201 is the smallest, which is a small-capacity constant-volume mode; when the lifting block 401 is located between the upper left plate 4043, the upper right plate 4063 and the lower left plate 4044, the lower right plate 4064, the lifting block 401 can move up and down, which is a variable-volume mode.

[0049] When in constant volume mode, since the lifting block 401 cannot move, the screw rod 119 cannot rotate, and the lifting plate 120 cannot be lifted or lowered, that is, the internal thread block 118 cannot be lifted or lowered, and the sliding of the two-sided rack rod 113 cannot drive the internal thread block 118 to lift or lower, and only the tension rod spring 116 can be stretched.

[0050] The working principle of a large-space variable displacement pump disclosed in the present invention is as follows: the pump motor 301 rotates through the transmission belt 303 to drive the transmission wheel 305 to rotate, thereby driving the long shaft 102 to rotate, thereby driving the cam 306 to rotate, and the rotation of the cam 306 drives the cam connecting rod 307 to rotate, thereby driving the piston rod 308 to slide in the pipe sleeve 310, and the inner sealing ring 309 enables the pump body 201 to maintain airtightness, thereby driving the upper piston block 311 and the lower piston block 314 to slide in the inner cavity of 291, performing work on the gas. The rotation of the long shaft 102 drives the top bevel gear 103 to rotate, thereby driving the vertical shaft 105 to rotate through the side bevel gear 104, thereby driving the inner bottom gear 109 and the outer bottom gear 110 to rotate through the bottom gear 106, thereby driving the inner half gear 107 and the outer half gear 112 to rotate, thereby driving the two-sided rack rod 113 to slide back and forth along the side slide rail 115, thereby driving the pull rod 114 and the rotating block 117 to rotate, thereby driving the internal thread block 118 and the lifting plate 120 to rise and fall, driving the screw rod 119 to rotate, and as the lifting plate 120 rises, the variable capacity plate 217 will be driven to rise, thereby driving the lower piston block 314 to slide along the upper piston block 311, and the inner spring 313 is squeezed, so that the piston adapts to the size of the inner cavity of the pump body 201. When the piston device moves, it drives gas to enter from the air inlet sleeve 211. The gas will impact the bottom one-way ball 221, causing the inner sliding column 220 to slide in the outer sliding cylinder 219, and the bottom ball spring 222 is compressed. The gas enters the pump body 201 through the variable capacity plate 217. The gas impacts the one-way ball 214 through the inner sleeve 213, causing the top sliding column 215 to slide in the air outlet sleeve 210, and the top ball spring 216 is squeezed. The gas enters the outlet pipe 204 through the air outlet sleeve 210, passes through the pump chamber 208, and is finally discharged through the outlet pipe 209.

[0051] The rotation of the screw rod 119 will drive the lifting block 401 to slide along the lifting slide rail 206, and the contraction of the locking electric cylinder 403 will drive the left locking plate 404 to slide on the pump body 201, thereby driving the bottom rotating gear 405 and the top rotating gear 407 to rotate through the upper bottom tooth 4041 and the lower top tooth 4042, thereby driving the upper top tooth 4062 and the lower bottom tooth 4061 to move, thereby driving the right locking plate 406 to slide outward along the pump body 201. At this time, the lower left plate 4044 and the lower right plate 4064 no longer block the protruding block 402. By adjusting the position of the lifting block 401, different usage modes can be adjusted. After the mode adjustment is completed, the locking electric cylinder 403 extends.

[0052] Since the screw rod 119 moves synchronously with the lifting plate 120, when the lifting plate 120 rises, it will drive the screw rod 119 to rotate, thereby driving the lifting block 401 to rise. When the lifting block 401 is located below the lower left plate 4044 and the lower right plate 4064, the lifting block 401 is stuck by the lower left plate 4044, the lower right plate 4064 and the screw plate 205. At this time, the volume of the cavity in the pump body 201 is the largest, which is a large-capacity constant-volume mode; when the lifting plate 120 rises, the screw rod 119 will rotate, thereby driving the lifting block 401 to rise. The lowering block 401 is located above the upper left plate 4043 and the upper right plate 4063. The lifting block 401 is stuck by the upper left plate 4043, the upper right plate 4063 and the screw plate 205. At this time, the internal volume of the pump body 201 is the smallest, which is the small-capacity constant-volume mode. When the lifting block 401 is located between the upper left plate 4043, the upper right plate 4063 and the lower left plate 4044, the lower right plate 4064, the lifting block 401 can move up and down, which is the variable-volume mode. When in the constant-volume mode, since the lifting block 401 cannot move, the screw 119 cannot rotate, the lifting disk 120 cannot be raised or lowered, that is, the internal thread block 118 cannot be raised or lowered, and the sliding of the two-sided rack rod 113 cannot drive the internal thread block 118 to rise or fall, and only the tension rod spring 116 can be stretched.

Claims

1. A large-space variable displacement pump, comprising a main body device, characterized in that: The main device includes a main frame (101), the main device is used to adjust the capacity of the pump, the main device is provided with a pump body device, the pump body device includes a pump body (201), the pump body (201) is fixedly mounted on the main frame (101), the pump body device is used for air intake and exhaust, the main device is provided with a piston device, the piston device includes a pump motor (301), the pump motor (301) is fixedly mounted on the main frame (101), the piston device is used to squeeze the gas in the pump body device, the pump body device is provided with an adjustment device, the adjustment device includes a lifting block (401), the lifting block (401) is slidably mounted on the pump body (201), and the adjustment device is used to adjust the use capacity of the pump; The main device comprises a long shaft (102) rotatably mounted on a main frame (101), a top bevel gear (103) fixedly mounted on the long shaft (102), a vertical shaft (105) rotatably mounted on the main frame (101), a side bevel gear (104) fixedly mounted on the vertical shaft (105), the top bevel gear (103) meshing with the side bevel gear (104), a bottom gear (106) fixedly mounted on the bottom of the vertical shaft (105), an inner shaft (108) rotatably mounted on the main frame (101), an inner half gear (107) and an inner bottom gear (109) fixedly mounted on the inner shaft (108), an outer shaft (111) rotatably mounted on the main frame (101), an outer bottom gear (110) and an outer shaft (111) fixedly mounted on the outer shaft (111), the inner bottom gear (109) meshing with the bottom gear (106), the bottom gear (106) is engaged with the outer bottom gear (110), a side slide rail (115) is fixedly installed on the main frame (101), a two-sided rack rod (113) is slidably installed on the side slide rail (115), the two-sided rack rod (113) is engaged with the inner shaft (108), the two-sided rack rod (113) is engaged with the outer half gear (112), a pull rod (114) is rotatably installed on the two-sided rack rod (113), a rotating block (117) is slidably installed on the pull rod (114), a rod spring (116) is provided between the rotating block (117) and the pull rod (114), a screw rod (119) is rotatably installed on the main frame (101), an internal thread block (118) is rotatably installed on the rotating block (117), the internal thread block (118) and the screw rod (119 form a threaded transmission, and a lifting plate (120) is fixedly installed on the internal thread block (118); The pump body device comprises a piston port (202) arranged on the side of the pump body (201), a pump top cover (203) is fixedly installed on the pump body (201), a screw plate (205) and a lifting slide rail (206) are fixedly installed on the side of the pump body (201), the screw plate (205) and the screw (119) are rotatably installed, a pump bottom cover (207) is fixedly installed on the bottom of the pump body (201), an air outlet sleeve (210) is fixedly installed on the top of the pump body (201), an air inlet sleeve (211) is slidably installed on the bottom of the pump body (201), and the air inlet sleeve (211) is fixedly installed on the bottom of the pump body (201). ) is fixedly mounted on the lifting plate (120), a variable capacity plate (217) is fixedly mounted on the air inlet sleeve (211), a sealing ring (218) is fixedly mounted on the outside of the variable capacity plate (217), the sealing ring (218) is slidably mounted on the inner wall of the pump body (201), an outlet pipe (204) is fixedly mounted on the air outlet sleeve (210), a pump chamber (208) is fixedly mounted on the outlet pipe (204), an outlet pipe (209) is fixedly mounted on the pump chamber (208), an air outlet mechanism is provided in the air outlet sleeve (210), and an air intake mechanism is provided in the air inlet sleeve (211); The adjusting device comprises a protruding clamping block (402) fixedly mounted on the lifting block (401), the lifting block (401) and the screw rod (119) form a threaded transmission, the lifting block (401) and the lifting slide rail (206) are slidably mounted, a positioning electric cylinder (403) is fixedly mounted on the pump body (201), a left positioning plate (404) is fixedly mounted on the top of the positioning electric cylinder (403), the left positioning plate (404) and the pump body (201) are slidably mounted, a right positioning plate (406) is slidably mounted on the pump body (201), and a bottom rotating gear (405) and a top rotating gear (407) are rotatably mounted on the pump body (201); The left locking plate (404) is provided with an upper bottom tooth (4041) and a lower top tooth (4042), and the right locking plate (406) is provided with a lower bottom tooth (4061) and an upper top tooth (4062). The upper bottom tooth (4041) meshes with the bottom rotating gear (405), the lower bottom tooth (4061) meshes with the bottom rotating gear (405), the lower top tooth (4042) meshes with the top rotating gear (407), and the upper top tooth (4062) meshes with the top rotating gear (407). The left locking plate (404) is provided with a left upper plate (4043) and a left lower plate (4044), and the right locking plate (406) is provided with a right upper plate (4063) and a right lower plate (4064). The air outlet mechanism comprises a fixed plate (212) fixedly mounted on the pump body (201), an inner sleeve (213) fixedly mounted on the fixed plate (212), a top sliding column (215) slidably mounted in the air outlet sleeve (210), a one-way ball (214) fixedly mounted on the top sliding column (215), a top ball spring (216) provided between the one-way ball (214) and the air outlet sleeve (210), and the one-way ball (214) and the inner sleeve (213) slidably mounted; The air intake mechanism comprises an outer slide cylinder (219) fixedly mounted on the variable capacity plate (217), an inner slide column (220) slidably mounted in the outer slide cylinder (219), a bottom one-way ball (221) fixedly mounted on the inner slide column (220), and a bottom ball spring (222) provided between the bottom one-way ball (221) and the variable capacity plate (217).

2. A large-space variable displacement pump according to claim 1, characterized in that: The piston device comprises a pump housing (302) fixedly mounted on a main frame (101), a long shaft (102) and the pump housing (302) being rotatably mounted, a motor wheel (304) being fixedly mounted on the motor shaft of the pump motor (301), a transmission wheel (305) being fixedly mounted on the long shaft (102), a transmission belt (303) being wound around the motor wheel (304) and the transmission wheel (305), a cam (306) being fixedly mounted on the long shaft (102), a cam connecting rod (307) being rotatably mounted on the cam (306), a piston rod (308) being rotatably mounted on the cam connecting rod (307), and the piston rod (308) being slidably mounted on the pump housing (302). A pipe sleeve (310) is fixedly mounted on the pump motor (301), the piston rod (308) and the pipe sleeve (310) are slidably mounted, an inner sealing ring (309) is fixedly mounted in the pipe sleeve (310), the pipe sleeve (310) and the piston mouth (202) are fixedly mounted, an upper piston block (311) is fixedly mounted on the piston rod (308), an upper sealing ring (312) is fixedly mounted on the upper piston block (311), a lower piston block (314) is slidably mounted on the upper piston block (311), a lower sealing ring (315) is fixedly mounted on the lower piston block (314), and an inner spring (313) is provided between the lower piston block (314) and the upper piston block (311).

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