TWI653392B - Pulling type vacuum pump - Google Patents

Abstract

The present invention provides a pull-type vacuum pump for adsorbing and transferring products. The pull-type vacuum pump includes a cylinder assembly and a piston assembly, the cylinder assembly including a two-cylinder body, a front cover, a rear cover and a connecting member, wherein one of the cylinders is sealingly connected between the front cover and the connecting member, The other cylinder is sealed between the rear cover and the connecting member, and each of the cylinders includes a cavity, and the front cover and the rear cover respectively define a connecting hole and a nozzle communicating with the corresponding cavity. a first air passage and a second air passage communicating with the corresponding cavity are formed on the connecting member; the piston assembly includes a second piston and a piston rod, the piston rod slidingly passes through the connecting member, and the two pistons are fixed on the The two pistons are slidably received in the corresponding two cavities at both ends of the piston rod. The pull type vacuum pump has a simple structure.

Description

Pull-type vacuum pump

The present invention relates to a vacuum pump, and more particularly to a pull type vacuum pump.

In the increasingly automated production lines, the product transfer process is gradually being replaced by automated equipment. The common method of product transfer is generally the method of a robot or a suction cup, and the premise of using a suction cup to adsorb the transferred product is to provide a vacuum environment to generate a negative pressure and adsorb the product.

However, the existing vacuuming equipment usually uses a motor to evacuate the gas in the vacuum chamber to generate a vacuum in the vacuum chamber to adsorb the product. This method of generating vacuum has a large power consumption and a serious noise pollution.

In view of the above problems, it is necessary to provide a pull-type vacuum pump with low noise.

A pull-type vacuum pump includes a cylinder assembly and a piston assembly, the cylinder assembly including a two-cylinder body, a front cover, a rear cover and a connecting member, wherein one of the cylinders is sealingly connected between the front cover and the connecting member, The other cylinder is sealed between the rear cover and the connecting member, and each of the cylinders includes a cavity, and the front cover and the rear cover respectively define a connecting hole and a nozzle connected to the corresponding cavity. a first air passage and a second air passage connected to the corresponding cavity are formed on the connecting member; the piston group The member includes a two piston and a piston rod, the piston rod slidingly passes through the connecting member, the two pistons are fixed at two ends of the piston rod, and the two pistons are slidably received in the corresponding two cavities.

The pull-type vacuum pump of the present invention comprises a cylinder assembly and a piston assembly, the cylinder assembly comprising a two-cylinder body and a front cover, a rear cover and a connecting member connected to both ends of the two-cylinder body, the piston assembly comprising a piston rod and a connection a second piston at two ends of the piston rod, the two pistons are slidably received in the two cylinders, and the drawing vacuum pump of the present invention pushes another piston to move through a piston located in one of the cavities, so as to The vacuum is formed in a cavity, and the drawing vacuum pump of the present invention has a simple structure and low noise.

100‧‧‧Drawing vacuum pump

10‧‧‧Cylinder components

12‧‧‧Cylinder

121‧‧‧Contraction

123‧‧‧ cavity

13‧‧‧中盖

14‧‧‧ front cover

143‧‧‧ gas nozzle

145‧‧‧Assemble

147‧‧‧ card slot

16‧‧‧Back cover

161‧‧‧connection hole

17‧‧‧Connecting parts

171‧‧‧First mounting hole

172‧‧‧Second mounting hole

173‧‧‧容容

174‧‧‧Transfer hole

175‧‧‧ side wall

1751‧‧‧First airway

1752‧‧‧Second airway

18‧‧‧ cushioning parts

19‧‧‧ Seal

30‧‧‧Piston assembly

32‧‧‧Piston

321‧‧‧Installation slot

323‧‧‧through hole

325‧‧‧ accommodating slots

34‧‧‧ bushing

35‧‧‧Adapter plate

36‧‧‧Abrasive pads

37‧‧‧ piston rod

371‧‧‧Threaded holes

38‧‧‧Fixed parts

50‧‧‧ gas valve

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an exploded view of a pull-out vacuum pump in accordance with a preferred embodiment of the present invention.

Figure 2 is an exploded view of the pull pump of Figure 1 in another direction.

Figure 3 is an assembled view of a pull-out vacuum pump in accordance with a preferred embodiment of the present invention.

Figure 4 is a partial cross-sectional view of the front cover of the pull-type vacuum pump of Figure 1.

Figure 5 is a partial cross-sectional view of the connector of the pull-out vacuum pump of Figure 1.

Figure 6 is a cross-sectional view of the pull-type vacuum pump of Figure 3 taken along the line IV-IV.

Figure 7 is a cross-sectional view showing the drawer vacuum pump of Figure 3 in another state.

Figure 8 is a schematic view of a pull-type vacuum pump according to another embodiment of the present invention.

Figure 9 is a schematic view of the pull-type vacuum pump of Figure 8 in another state.

The pull-type vacuum pump 100 of the present invention is used to create a vacuum environment. In the present embodiment, the adsorption and transfer of the product by the vacuum generated by the drawing vacuum pump 100 will be described as an example.

Referring to FIGS. 1 through 3 together, the pull-type vacuum pump 100 includes a cylinder assembly 10, a piston assembly 30 that is slidably received in the cylinder assembly 10, and a plurality of air valves 50. The gas valve 50 is connected to the cylinder assembly 10 at one end and to an air pump (not shown) at the other end, and the compressed air is blown into the cylinder assembly 10 through the air pump.

The cylinder block assembly 10 includes a two-cylinder body 12, a front cover 14, a rear cover 16, a connecting member 17, a plurality of cushioning members 18, and a seal ring 19 (see Fig. 6). The two cylinder block 12 has a hollow tubular structure. Specifically, one end of the cylinder block 12 is connected to one end of the front cover 14 and the other end is connected to one end of the connecting member 17; the other end of the other cylinder block 12 is connected to one end of the rear cover 16 and the other end is connected to The other end of the connector 17. Two shrinkage portions 121 are formed at both ends of each of the cylinder blocks 12, and each of the cylinder blocks 12 also forms a hollow cavity 123. The two cavities 123 are for receiving the piston assembly 30. The plurality of constricted portions 121 respectively support one end of the front cover 14 , the rear cover 16 and the connecting member 17 to seal the two cylinders 12 to the front cover 14 and the connecting member 17 and the rear cover 16 and the connecting member respectively. 17 between. In this embodiment, the connection between the two-cylinder 12 and the front cover 14, the rear cover 16, and the connecting member 17 are the same. To avoid redundancy, the present case is between the front cover 14 and one of the cylinders 12. The connection method is described as an example.

Referring to FIG. 2 and FIG. 4 together, in the embodiment, the front cover 14 is substantially a cylindrical structure. The front cover 14 may have other shapes to meet specific installation and use conditions. The front cover 14 defines a gas nozzle 143 that extends through the ends of the front cover 14. The front cover 14 defines at least one mounting groove 145 at one end thereof, and each of the mounting slots 145 is configured to receive one of the buffer members 18. In this embodiment, the mounting groove 145 is a ring structure, and correspondingly, the buffer member 18 is also a ring structure. A retaining groove 147 is defined in the peripheral wall of the front cover 14 adjacent to the mounting groove 145. The retaining groove 147 extends obliquely from the end of the peripheral wall adjacent to the mounting groove 145 to the other end. The retaining groove 147 is for holding one end of one of the cylinders 12.

The rear cover 16 has a structure similar to the front cover 14, and one end of the rear cover 16 is coupled to one end of the other cylinder 12. The other end of the rear cover 16 defines a connecting hole 161.

Referring to FIG. 2 and FIG. 5 , the two ends of the connecting member 17 are respectively sealed and connected to one end of the two-cylinder 12 away from the corresponding front cover 14 and rear cover 16 . A first mounting hole 171 is defined in one end of the connecting member 17 , and a second mounting hole 172 is defined in the other end of the connecting member 17 . The first mounting hole 171 is in communication with the second mounting hole 172 , and the first mounting hole 171 is larger in diameter than the second mounting hole 172 . An accommodating cavity 173 is defined in a peripheral wall (not labeled) of the second mounting hole 172 and the first mounting hole 171. The accommodating cavity 173 has a larger diameter than the second mounting hole 172. An adapter hole 174 is defined in an end of the connecting member 17 adjacent to the first mounting hole 171. The adapter hole 174 is connected to one of the air valves 50. A first air passage 1751 and a second air passage 1752 are oppositely defined on the side wall 175 of the connecting member 17. The first air passage 1751 is connected to one of the air valves 50 at one end and communicates with the second mounting hole 172 at the other end. The second air passage 1752 is in communication with the through hole 174. The plurality of cushioning members 18 are respectively mounted on one ends of the front cover 14, the rear cover 16, and the connecting member 17, and are mounted in the same manner. In this embodiment, the case where one of the buffer members 18 is attached to the mounting groove 145 will be described as an example. The buffer member 18 is latched in the fitting groove 145 on one side and protrudes from the fitting groove 145 on the other side. The protruding portion of the buffer member 18 is used to abut the piston assembly 30 to provide the movement of the piston assembly 30. Buffering effect. The sealing ring 19 (see FIG. 6 ) is sleeved on the piston assembly 30 and received in the receiving cavity 173 to directly form a seal between the connecting member 17 and the piston assembly 30 .

The piston assembly 30 slidably passes through the connecting member 17, and the two ends of the piston assembly 30 are slidably received in the two cavities 123, respectively. The piston assembly 30 includes two pistons 32, a plurality of bushings 34, a wear pad 36, a piston rod 37 and two fasteners 38. Each of the pistons 32 is slidably received in one of the cavities 123, and each of the pistons 32 is provided with a plurality of mounting grooves 321 . A through hole 323 is defined in one end of each of the pistons 32, and a receiving groove 325 is defined in the other end. The through hole 323 communicates with the receiving groove 325. The accommodating groove 325 is configured to receive the piston rod 37. The accommodating groove 325 has a diameter larger than the through hole 323. The plurality of bushings 34 are respectively retained in the plurality of mounting grooves 321 to form a seal between the two pistons 32 and the two cylinder blocks 12. The wear pad 36 is sleeved on the piston rod 37 and received in the first mounting hole 171. The piston rod 37 extends through the first mounting hole 171 and the second mounting hole 172. The diameter of the piston rod 37 is smaller than the first mounting hole 171 and the second mounting hole 172. Two screw holes 371 are respectively defined at two ends of the piston rod 37. The two ends of the piston rod 37 are respectively received in the two accommodating grooves 325. One end of each fixing member 38 passes through the one through hole 323 and is screwed into the corresponding threaded hole 371 , and the other end is clamped on the side of the corresponding piston 32 to connect the two pistons 32 to the piston rod 37 . Both ends.

In this embodiment, the number of the air valves 50 is four, wherein one end of the two air valve 50 is sealingly connected to the first air passage 1751 and the connecting hole 161, and the other end is connected to an air pump. The other two gas valves 50 are respectively sealedly connected to the gas nozzle 143 and the second air passage 1752, and the other end is connected with a nozzle (not shown) for adsorbing the product.

Referring to FIG. 6 to FIG. 7, the assembly process and working process of the pull-type vacuum pump 100 of the preferred embodiment of the present invention will be described below in conjunction with the drawings. When the pull-type vacuum pump 100 is assembled, one end of the two-cylinder 12 is sealingly connected to the two ends of the connecting member 17, and the first air passage 1751 communicates with the corresponding cavity 123 through the second mounting hole 172. The second air passage 1752 communicates with the other cavity 123 through the through hole 174.

The sealing ring 19 and the wear pad 36 are respectively held in the accommodating cavity 173 and the first mounting hole 171. One end of the piston rod 37 is sequentially passed through the wear pad 36, the sealing ring 19 and the second mounting hole 172, so that the two ends of the piston rod 37 are respectively received in the two cavities 123. The plurality of bushings 34 are respectively received in the corresponding mounting slots 321 , and each of the pistons 32 is received in one of the cavities 123 and sleeved at one end of the piston rod 37 . One end of each fixing member 38 is passed through the corresponding piston 32, and finally screwed into the corresponding threaded hole 371, so that the two pistons 32 are connected to both ends of the piston rod 37, and the corresponding cavity 123 A seal is formed between them.

The front cover 14 and the rear cover 16 are respectively mounted on one end of the corresponding cylinder 12 away from the connecting member 17, so that the air nozzle 143 and the connecting hole 161 are respectively communicated with the corresponding cavity 123. Will A plurality of air valves 50 are respectively mounted on the corresponding air nozzles 143, the connection holes 161, the first air passages 1751 and the second air passages 1752.

In the initial state, the piston 32 adjacent to the front cover 14 may be located at one end of the cavity 123 adjacent to the front cover 14, or may be located near one end of the connecting member 17. Hereinafter, the description is made that the end of the piston 32 adjacent to the front cover 14 located in the cavity 123 near the connecting member 17 is an initial state, and the other piston 32 is located at the other cavity 123 near the rear cover 16 . One end. When the product is transferred using the pull-type vacuum pump 100, the compressed gas is first injected into the corresponding cavity 123 through the gas valve 50 connected to the connection hole 161, and at this time, the first air passage 1751 and the first portion are connected. The second air passage 1752 is in a closed state, and the air nozzle 143 is in an open state. Under the pushing of the compressed gas, the piston 32 near one end of the connecting hole 161 slides toward an end away from the connecting hole 161, and pushes the other piston 32 along the corresponding cavity 123 to the front cover through the piston rod 37. 14 slides at one end.

After injecting the high pressure gas for a period of time, the piston 32 near one end of the rear cover 16 slides to the side of the connecting member 17, and the other piston 32 slides to the front cover 14, since the second air passage 1752 is always closed, A vacuum chamber is formed between the piston 32 adjacent to the front cover 14 and the connecting member 17. At this time, the product may be adsorbed by a nozzle connected to the second air passage 1752.

After the nozzle of the second air passage 1752 is sucked into the product, the operator transfers the product to the designated position, and opens the air valve 50 connected to the connecting hole 161 and the second air passage 1752 to be connected to the air nozzle 143. The gas valve 50 is closed. The compressed gas is injected into the cavity 123 communicating therewith by the gas valve 50 connected to the first air passage 1751. Since the gas valve 50 connected to the second air passage 1752 is opened, the vacuum chamber between the piston 32 close to the front cover 14 and the connecting member 17 disappears, and the product falls from the suction nozzle. The two pistons 32 are slid to the initial position by the compression of the compressed gas. Since the gas nozzle 143 is in a closed state during the process, another vacuum is formed between the piston 32 adjacent to the front cover 14 and the front cover 14. Cavity. At this time, the product can be adsorbed by the nozzle connected to the gas nozzle 143.

8 and FIG. 9 show a drawing vacuum pump 100 according to another embodiment of the present invention. The other embodiment is different from the above embodiment in that the two cylinders 12 are arranged side by side, and the connecting member 17 includes two middle covers 13, Each of the middle covers 13 is correspondingly connected to one end of the cylinder block 12 away from the front cover 14 and the rear cover 16, and is connected in the same manner as the front cover 14 and the cylinder block 12. A first air passage 1751 communicating with the corresponding cavity 123 is defined in the middle cover 13 , and a second air passage 1752 communicating with the other cavity 123 is defined in the other middle cover 13 .

The piston assembly 30 further includes an adapter plate 35. The piston rods 37 are two in number, and one end of each of the piston rods 37 is correspondingly sealingly passed through one of the middle covers 13 and connected to one of the pistons 32. The other end of the second piston rod 37 is connected to the adapter plate 35. Other components and connection relationships are the same as in the other embodiments. When the piston 32 is moved toward or away from the middle cover 13 by the high pressure gas, since the two piston rods 37 are both connected to the adapter plate 35, the other piston 32 also corresponds to Moving in a direction toward or away from the other middle cover 13 creates a vacuum environment in the corresponding cylinder 12.

The pull-type vacuum pump 100 of the present invention includes a cylinder block assembly 10 and a piston assembly 30. The cylinder block assembly 10 includes a two-cylinder block 12 and a front cover 14, a rear cover 16 and a connecting member 17 connected to both ends of the two-cylinder block 12, The piston assembly 30 includes a piston rod 37 and two pistons 32 connected to opposite ends of the piston rod 37. The two pistons 32 are slidably received in the two cylinders 12, the front cover 14, the rear cover 16, and the connecting member. The air nozzle 143, the connecting hole 161, the first air passage 1751 and the second air passage 1752 which are in communication with the cylinder 12 are respectively opened. In the preferred embodiment of the present invention, by changing the opening and closing state of the air nozzle 143 and the connecting hole 161, and selecting the corresponding first air passage 1751 and the second air passage 1752, compressed air is introduced into the corresponding cylinder 12 to make another cylinder. The vacuum is formed in the body 12, and the drawing vacuum pump 100 of the present invention has a simple structure and low noise.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. In addition, those skilled in the art can also make other changes within the spirit of the present invention. These changes, which are made in accordance with the spirit of the invention, are intended to be included within the scope of the invention.

Claims (9)

A pull-type vacuum pump, wherein the pull-type vacuum pump comprises a cylinder assembly and a piston assembly, the cylinder assembly comprising a two-cylinder body, a front cover, a rear cover and a connecting member, wherein one of the cylinder blocks is sealingly connected to the front cover Between the connecting members, the other cylinder is sealingly connected between the rear cover and the connecting member. The front cover defines a retaining groove, and the two ends of each cylinder form a constricted portion, and one of the constricted portions Each of the cylinders includes a cavity, and the front cover and the rear cover respectively define a connecting hole and a gas nozzle that communicate with the corresponding cavity, and the connecting member is opened corresponding thereto a first air passage and a second air passage communicating with the cavity; the piston assembly includes a second piston and a piston rod, the piston rod slidingly passes through the connecting member, the two pistons are fixed at two ends of the piston rod, the two The piston is slidably received in the corresponding two cavity. The pull-type vacuum pump of claim 1, wherein the cylinder assembly further comprises a plurality of buffering members, the front cover is provided with a mounting groove at one end, and one of the buffering members is clamped in the mounting groove at one end, and One end protrudes from the mounting groove, and the other buffer members are respectively held in the back cover and the connecting member and are abutted against the corresponding cylinder. The pull-out vacuum pump of claim 1, wherein the connecting member has a first mounting hole at one end and a second mounting hole at the other end, the first mounting hole is in communication with the second mounting hole, The diameter of the first mounting hole is larger than the second mounting hole, and a receiving cavity is defined in the peripheral wall of the second mounting hole and the first mounting hole. The diameter of the receiving cavity is larger than the second mounting hole. Sliding through the first mounting hole and the second mounting hole, the diameter of the piston rod is smaller than the first mounting hole and the second mounting hole. The pull-type vacuum pump of claim 3, wherein the connecting member comprises a side wall, the first air passage and the second air passage are formed on the side wall, and the first air passage is in communication with the second mounting hole, The second mounting hole is in communication with the one of the cavities; the connecting member has an adapter hole at one end thereof, the one end of the adapter hole is communicated with the second air passage, the other end of the adapter hole and the first mounting hole and the other The chambers are connected. The pull-type vacuum pump of claim 3, wherein the cylinder assembly further comprises a sealing ring, the sealing ring is retained in the accommodating cavity, the piston assembly further comprising a wear pad, the resistant The grinding pad is retained in the first mounting hole, and the piston rod sequentially passes through the wear pad, the sealing ring and the second mounting hole. The pull-type vacuum pump of claim 1, wherein the cylinder assembly further comprises a plurality of bushings, wherein each of the pistons has a mounting groove, and the plurality of bushings are latched at the corresponding mounting slot The other end is held against the corresponding cylinder. The pull-type vacuum pump of claim 1, wherein the piston assembly further comprises two fixing members, one end of each piston defines a through hole, and the other end defines a receiving groove, the through hole and the receiving groove The two ends of the piston rod are respectively received in the corresponding receiving slots, and the two fixing members are respectively fixedly connected to one end of the piston rod through the corresponding through holes. The pull-type vacuum pump of claim 1, wherein the pull-type vacuum pump further comprises a plurality of gas valves, wherein the plurality of gas valves are respectively connected to the gas nozzle, the connecting hole, the first air passage and the second air passage. . A pull-type vacuum pump, wherein the pull-type vacuum pump comprises a cylinder assembly and a piston assembly, the cylinder assembly comprising a two-cylinder body, a front cover, a rear cover and a connecting member, wherein one of the cylinder blocks is sealingly connected to the front cover Between the connecting members, the other cylinder is sealingly connected between the rear cover and the connecting member. The front cover defines a retaining groove, and the two ends of each cylinder form a constricted portion, and one of the constricted portions Each of the cylinders includes a cavity, and the front cover and the rear cover respectively define a connecting hole and a gas nozzle that communicate with the corresponding cavity, and the connecting member is opened corresponding thereto a first air passage and a second air passage connected to the cavity; the piston assembly includes a second piston, a second piston rod and an adapter plate, the connecting member includes two middle covers, and each of the middle covers is correspondingly connected to the cylinder The first air passage and the second air passage are respectively disposed on the corresponding middle cover, and the two piston rods are respectively sealedly connected to the corresponding piston through one of the middle covers, The other end is connected to the adapter board.