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CN-224221768-U - Jet type piezoelectric glue outlet valve

CN224221768UCN 224221768 UCN224221768 UCN 224221768UCN-224221768-U

Abstract

The utility model discloses a jet type piezoelectric glue outlet valve, which comprises a valve body, a glue supply block, a nozzle, a firing pin, a piezoelectric cylinder and a lever, wherein the valve body is internally provided with a containing groove, the glue supply block is arranged outside the lower end of the valve body, the glue supply block is internally provided with a glue flow channel, the nozzle is matched with the nozzle, the piezoelectric cylinder is vertically arranged in the containing groove, the lever is rotatably connected between the lower end of the piezoelectric cylinder and the upper end of the firing pin, a first mounting groove is formed in the valve body, a circular lower protruding part is arranged on a connecting seat, the upper end of the connecting seat is connected with the valve body, an external thread is arranged on the outer side surface of the circular lower protruding part, the circular lower protruding part is coaxially arranged with the glue outlet flow channel, a mounting seat is sleeved outside the circular lower protruding part, and the lower end of the firing pin, which is matched with one end of the lever, passes through the circular lower protruding part and is in collision fit with the nozzle. The utility model can improve the stability and stress consistency of the performance of the piezoelectric cylinder and the return spring, and improve the precision of dispensing and the stability of the dispensing performance in the long-term use process.

Inventors

  • CHEN XIAOFENG
  • CHEN YUCHEN
  • XU XIAOBO

Assignees

  • 苏州卓兆点胶股份有限公司

Dates

Publication Date
20260512
Application Date
20250514

Claims (6)

  1. 1. The jet type piezoelectric glue outlet valve comprises a valve body (22) with a containing groove (21) inside, a glue feeding block (2) arranged outside the lower end of the valve body (22) and internally provided with a glue flow channel (1), a nozzle (3), a firing pin (4) matched with the nozzle (3), a piezoelectric column (24) vertically arranged in the containing groove (21) and a lever (8) rotatably connected between the lower end of the piezoelectric column (24) and the upper end of the firing pin (4), and is characterized in that the glue feeding block (2), the valve body (22) and the nozzle (3) are connected through a connecting seat (5), the connecting seat (5) is respectively provided with a glue inlet flow channel (6) and a glue outlet flow channel (7) which are mutually communicated, one end of the glue inlet flow channel (6) far away from the glue outlet flow channel (7) is communicated with the glue flow channel (1) on the glue feeding block (2), and the lower end of the glue outlet flow channel (7) which vertically extends is far away from the glue inlet flow channel (6) is communicated with the nozzle (3); A first mounting groove (23) is formed in the valve body (22) and located right above the piezoelectric cylinder (24), the upper end of the piezoelectric cylinder (24) is in contact with a fixed block (17) arranged in the first mounting groove (23), a circular lower protruding portion (12) extending downwards is formed in the lower end face of the connecting seat (5) connected with the valve body (22), an external thread is arranged on the outer side surface of the circular lower protruding portion (12) coaxially arranged with the glue outlet flow channel (7), a mounting seat (13) is sleeved on the outer side of the circular lower protruding portion (12) and is connected with the circular lower protruding portion (12) through threads, the nozzle (3) is adjustably mounted at the lower end of the circular lower protruding portion (12) through the mounting seat (13), and the lower end of the striker (4) with the upper end matched with one end of the lever (8) penetrates through the circular lower protruding portion (12) and is in collision fit with the nozzle (3).
  2. 2. The injection type piezoelectric glue outlet valve according to claim 1, wherein the fixed block (17) is formed by splicing a first wedge block (18) and a second wedge block (19) which are matched with each other, an inclined plane on the second wedge block (19) above the first wedge block (18) is in sliding fit with an inclined plane on the first wedge block (18), a jackscrew (20) is embedded and installed on the side wall of the valve body (22), the jackscrew (20) and the second wedge block (19) are in pushing contact with the end face opposite to one end of the first wedge block (18), and the lower surface of the first wedge block (18) is in pressing contact with the upper end of the piezoelectric cylinder (24).
  3. 3. The injection type piezoelectric dispensing valve according to claim 1 or 2, wherein a second mounting groove (26) communicated with the accommodating groove (21) is formed in the lower end face of the valve body (22), and the upper end of the connecting seat (5) is embedded and mounted in the second mounting groove (26).
  4. 4. The injection type piezoelectric dispensing valve according to claim 1 or 2, wherein the end of the lever (8) far away from the firing pin (4) is rotatably connected with the second groove (10) through a second protrusion (9) which is matched with the inner wall of the accommodating groove (21) positioned below the end of the lever, the lower end of the piezoelectric cylinder (24) is rotatably contacted with the first groove (242) through a first protrusion (241) which is matched with the lever (8), and an arc-shaped protruding part (11) which is contacted with the upper end face of the firing pin (4) is arranged on the lower surface of the end of the lever (8) close to the firing pin (4).
  5. 5. The injection type piezoelectric dispensing valve according to claim 4, wherein the plunger (4) is slidably mounted between the lever (8) and the nozzle (3) through a guide sleeve (14), and a first return spring (15) is provided between the guide sleeve (14) and the upper end of the plunger (4).
  6. 6. The injection type piezoelectric dispensing valve according to claim 5, wherein a second return spring (16) is arranged between the lever (8) and the valve body (22).

Description

Jet type piezoelectric glue outlet valve Technical Field The utility model relates to the technical field of dispensing, in particular to a jet type piezoelectric dispensing valve. Background Piezoelectric jetting valves are commonly used for high precision, high consistency fluid control, for achieving non-contact fluid control, such as dispensing and jetting of glues and inks, wherein piezoelectric jetting dispensing valves are commonly used in the field of electronic packaging. Through searching, the patent with the publication number of CN213825643U discloses a high-speed fluid injection valve, which comprises a valve body with a containing cavity, a piezoelectric ceramic stack column body in the containing cavity, a swinging rod, a firing pin, a supporting spring, a second spring and a glue feeding mechanism, wherein the swinging rod is controlled by the piezoelectric ceramic stack column body in the containing cavity so as to control the firing pin to carry out glue dispensing on glue fed by the glue feeding mechanism, and then the swinging rod and the firing pin are reset by the supporting spring and the second spring so as to carry out next glue dispensing. In the above-mentioned patent, through the linkage setting of structure between rotating the subassembly and depression bar, the swinging arms, can realize the regulation to the striker position, but this regulation mode reduces piezoceramics stack cylinder and spring's stability in long-term use easily, and then reduces the stability of point gum performance. Disclosure of utility model The utility model aims to solve the technical problem of providing the jet type piezoelectric glue outlet valve, which can improve the stability and stress consistency of the performance of a piezoelectric cylinder and a reset spring and improve the precision of glue dispensing and the stability of glue dispensing performance in the long-term use process. In order to solve the technical problems, the utility model adopts the technical scheme that the jet type piezoelectric glue outlet valve comprises a valve body, a glue supply block, a nozzle, a firing pin, a piezoelectric cylinder, a lever and a connecting seat, wherein the valve body is internally provided with a containing groove, the glue supply block is arranged outside the lower end of the valve body, the glue supply block is internally provided with a glue flow channel, the nozzle is matched with the firing pin, the piezoelectric cylinder is vertically arranged in the containing groove, the lever is rotatably connected between the lower end of the piezoelectric cylinder and the upper end of the firing pin, the glue supply block, the valve body and the nozzle are connected through the connecting seat, the connecting seat is respectively provided with a glue inlet flow channel and a glue outlet flow channel which are mutually communicated, one end of the glue inlet flow channel far away from the glue outlet flow channel is communicated with the glue flow channel on the glue supply block, and the lower end of the glue outlet flow channel which vertically extends is far away from the glue inlet flow channel is communicated with the nozzle; The valve body is internally provided with a first mounting groove right above the piezoelectric cylinder, the upper end of the piezoelectric cylinder is in pressing contact with a fixed block arranged in the first mounting groove, the lower end face of the connecting seat, which is connected with the valve body, is provided with a downward extending circular lower convex part, the outer side surface of the circular lower convex part, which is coaxially arranged with the glue outlet flow passage, is provided with external threads, a mounting seat is sleeved on the outer side of the circular lower convex part and is connected with the circular lower convex part through threads, a nozzle is adjustably mounted at the lower end of the circular lower convex part through the mounting seat, and the lower end of the firing pin, which is matched with one end of the lever, penetrates through the circular lower convex part and is in collision fit with the nozzle. The further improved scheme in the technical scheme is as follows: 1. In the above scheme, the fixed block is formed by the concatenation of first wedge and the second wedge of mutually supporting, is located first wedge top inclined plane on the second wedge and the inclined plane sliding fit on the first wedge, the embedding is installed a jackscrew on the lateral wall of valve body, jackscrew and second wedge are opposite to the terminal surface ejector contact of first wedge one end, the lower surface of first wedge supports press contact with the upper end of piezoelectricity cylinder. 2. In the above scheme, a second mounting groove communicated with the accommodating groove is formed in the lower end face of the valve body, and the upper end of the connecting seat is embedded and mounted in the second mounting groove.