Lever type glue outlet valve body of glue dispenser

Abstract

The utility model relates to the technical field of glue dispensing, in particular to a lever type glue outlet valve body of a glue dispenser, which comprises a valve body and a valve body cover plate, an accommodating cavity is formed between the valve body and the valve body cover plate, a piezoelectric component, a lever and a firing pin component are arranged in the accommodating cavity, and an air inlet and an air outlet are arranged on the valve body cover plate. The air inlet and the air outlet are connected with an air cooling assembly, the air cooling assembly comprises an air inlet pipe and an air outlet pipe, and a first filter screen and a second filter screen are further arranged in the air inlet pipe. Due to the fact that the air cooling assembly on the valve body cover plate can timely discharge heat generated when the piezoelectric assembly works, the piezoelectric assembly is prevented from being damaged due to high temperature, and the first filter screen and the second filter screen are arranged in the air inlet pipe and can filter dust and water in air. And dust and water in cooling air are prevented from entering the valve body to damage the piezoelectric assembly and cause short circuit of the glue outlet valve body to influence the working efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of dispensing, in particular to a lever - type glue - discharging valve body of a dispenser. Background Technique

[0002] The lever - type glue - discharging valve, also called a dispensing - type injection valve, is applicable to the encapsulation work in the electronics industry. With the rapid development of the electronics industry, the requirements for electronic encapsulation are getting higher and higher. For high - requirement electronic encapsulation technology, the lever - type glue - discharging valve is more and more widely used in the field of electronic encapsulation due to its advantages such as high efficiency and high precision. A piezoelectric stack block with high response speed and high precision is used as the core driving component of the lever - type glue - discharging valve body.

[0003] The piezoelectric stack block in the lever - type glue - discharging valve needs to act frequently during operation, which will cause the temperature of the component to rise. The increase in temperature will affect the dispensing accuracy and efficiency, and in severe cases, it will cause damage to the piezoelectric stack block. Therefore, a corresponding heat - dissipation structure generally needs to be set for heat dissipation in the lever - type glue - discharging valve. The existing heat - dissipation methods are generally to open heat - dissipation holes in the valve body or install a heat - dissipation fan. The heat - dissipation effect of this heat - dissipation method is not good. When the dust or humidity in the air is large and enters the valve body, the dust is likely to damage the piezoelectric stack block, and the moisture in the air will cause a short - circuit of the valve body, thus affecting the working efficiency. Content of the Utility Model

[0004] In view of the above - mentioned technical problems existing in the prior art, the utility model provides a lever - type glue - discharging valve body of a dispenser.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] A lever - type glue - discharging valve body of a dispenser, including a valve body and a valve - body cover plate. A containing chamber is formed between the valve body and the valve - body cover plate. A piezoelectric component, a lever and a needle - hitting component are arranged in the containing chamber. An air inlet and an air outlet are opened on the valve - body cover plate. An air - cooling component is connected to the air inlet and the air outlet. The air - cooling component includes an air inlet pipe and an air outlet pipe. A first filter screen and a second filter screen are also arranged in the air inlet pipe.

[0007] Preferably, the air inlet pipe includes a vertical pipe and a bent pipe. The vertical pipe is detachably connected to the bent pipe. The first filter screen is arranged in the vertical pipe, and the second filter screen is arranged at the connection between the vertical pipe and the bent pipe.

[0008] Preferably, a first positioning column and a second positioning column are also arranged in the containing chamber. The first positioning column is arranged at the top of the containing chamber and is matched with the piezoelectric component. The second positioning column is arranged at the bottom of the containing chamber, and the lever is arranged on the containing chamber.

[0009] Preferably, the piezoelectric component includes a piezoelectric stack block and a positioning block. The top of the positioning block is matched with the first positioning column, the bottom of the positioning block is connected to the piezoelectric stack block. The top end of the piezoelectric stack block is provided with a spherical convex arc surface, and the bottom end of the positioning block is provided with a spherical inner groove adapted thereto.

[0010] Preferably, a locking screw is further provided on the valve body. The rod body of the locking screw penetrates into the accommodating chamber and contacts the positioning block.

[0011] Preferably, the striker assembly includes a striker, a striker guide sleeve, a buffer spring and a return spring. The striker is sleeved in the striker guide sleeve. The buffer spring is sleeved between the striker and the striker guide sleeve, and the return spring is sleeved on the striker guide sleeve.

[0012] Preferably, one end of the lever is matched with the piezoelectric component. A U-shaped groove is provided at the lower end of the piezoelectric stack block, and a U-shaped block adapted thereto is provided on the lever.

[0013] Preferably, the other end of the lever is matched with the striker assembly. A spherical impact table is provided on the right bottom surface of the lever for impacting the striker, and the top surface of the return spring abuts against the bottom surface of the lever for resetting the lever.

[0014] Advantages of the present utility model:

[0015] A lever-type glue dispensing valve body of a glue dispenser provided by the present utility model includes a valve body and a valve body cover plate. An accommodating chamber is formed between the valve body and the valve body cover plate. A piezoelectric component, a lever and a striker assembly are provided in the accommodating chamber. An air inlet and an air outlet are provided on the valve body cover plate. An air cooling component is connected to the air inlet and the air outlet. The air cooling component includes an air inlet pipe and an air outlet pipe. First and second filter meshes are further provided in the air inlet pipe. Since the air cooling component is provided on the valve body cover plate, the air cooling component can timely discharge the heat generated when the piezoelectric component works, so as to prevent the piezoelectric component from being damaged due to high temperature. And the first filter mesh and the second filter mesh provided in the air inlet pipe can filter dust and moisture in the air, avoiding damage to the piezoelectric component and short circuit of the glue dispensing valve body caused by dust and moisture in the cooling air, which affects the working efficiency. Description of the drawings

[0016] Figure 1 It is a three-dimensional view of a lever-type glue dispensing valve body of a glue dispenser in the embodiment.

[0017] Figure 2 It is an assembly schematic diagram of the valve body, the piezoelectric component, the lever and the striker assembly in the embodiment.

[0018] Figure 3 It is an exploded schematic diagram of the air cooling component and the valve body cover plate in the embodiment.

[0019] Figure 4 It is a cross-sectional view of the air inlet pipe in the embodiment.

[0020] Figure 5 Schematic diagram of the piezoelectric component and the lever explosion in the embodiment.

[0021] Figure 6 Schematic diagram of the firing pin component explosion in the embodiment.

[0022] Reference numerals: 1, valve body; 101, valve body cover plate; 111, air inlet; 121, air outlet; 102, accommodating chamber; 123, first positioning post; 133, second positioning post; 134, locking screw

[0023] 2, air-cooling component; 201, air inlet pipe; 211, vertical pipe; 221, bent pipe; 231, first filter screen; 241, second filter screen; 202, air outlet pipe

[0024] 3, piezoelectric component; 301, piezoelectric stack block; 311, spherical convex arc surface; 321, U-shaped groove; 302, positioning block; 312, spherical inner groove

[0025] 4, lever; 401, U-shaped block; 402, spherical impact table

[0026] 5, firing pin component; 501, firing pin; 502, firing pin guide sleeve; 503, buffer spring; 504, return spring Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0028] As Figures 1 to 6 shown, a lever-type glue outlet valve body of a dispensing machine includes a valve body 1. A valve body cover plate 101 is further provided on the valve body 1. The valve body cover plate 101 is detachably connected to the valve body 1 through bolt fasteners. An accommodating chamber 102 is provided between the valve body cover plate 101 and the valve body 1. A piezoelectric component 3, a lever 4, and a firing pin component 5 are sequentially arranged in the accommodating chamber 102 from top to bottom.

[0029] An air inlet 111 and an air outlet 121 are provided on the valve body cover plate 101. The air inlet 111 is arranged above the air outlet 121. An air cooling component 2 is connected to the air inlet 111 and the air outlet 121. The air cooling component 2 includes an air inlet pipe 201 and an air outlet pipe 202. Cooling air enters from the air inlet pipe 201 to dissipate heat from the piezoelectric component 3 in the valve body 1 and then is discharged from the air outlet pipe 202, circulating in turn to achieve the heat dissipation effect. Among them, the air inlet pipe 201 includes a vertical pipe 211 and a bent pipe 221. The vertical pipe 211 is detachably connected to the bent pipe 221 through threaded cooperation. A first filter screen 231 and a second filter screen 241 are also provided in the air inlet pipe 201. The first filter screen 231 is arranged in the vertical pipe 211, and the second filter screen 241 is arranged at the connection between the vertical pipe 211 and the bent pipe 221. The first filter screen 231 is a dust-proof net, and the second filter screen 241 is a filter cotton, and the filter cotton is replaceable. Since the air cooling component 2 is provided on the valve body cover plate 101, the air cooling component 2 can timely discharge the heat generated when the piezoelectric component 3 works, so as to prevent the piezoelectric component 3 from being damaged due to high temperature. And the first filter screen 231 and the second filter screen 241 provided in the air inlet pipe 201 can filter dust and moisture in the air, avoiding damage to the piezoelectric component 3 and short circuit of the valve body 1 caused by dust and moisture in the cooling air, which affects the working efficiency.

[0030] Furthermore, the piezoelectric component 3 includes a piezoelectric stack block 301 and a positioning block 302. The positioning block 302 is arranged above the piezoelectric stack block 301. The positioning block 302 is connected to the piezoelectric stack block 301. A spherical convex arc surface 311 is provided at the upper end of the piezoelectric stack block 301, and a spherical inner groove 312 is provided at the lower end of the positioning block 302. The spherical convex arc surface 311 is adapted to the spherical inner groove 312. Among them, a first positioning post 123 and a second positioning post 133 are also provided in the accommodation chamber 102. The first positioning post 123 and the second positioning post 133 are cylinders. The first positioning post 123 is arranged at the top of the accommodation chamber 102 and cooperates with the positioning block 302 to position the positioning block 302. Specifically, an arc-shaped groove is provided at the top of the positioning block 302, and the arc-shaped groove is adapted to the cylindrical surface of the first positioning post 123. The second positioning post 133 is arranged at the bottom end of the accommodation chamber 102, and the lever 4 is arranged on the second positioning post 133. Among them, one end of the lever 4 cooperates with the piezoelectric component 3. Specifically, a U-shaped groove 321 is provided at the lower end of the piezoelectric stack block 301 in the piezoelectric component 3, and a U-shaped block 401 is provided at the left top of the lever 4. The U-shaped groove 321 is adapted to the U-shaped block 401. Through the cooperation of the U-shaped groove 321 and the U-shaped block 401, the piezoelectric component 3 and the lever 4 have a certain guiding function during installation, ensuring the installation accuracy between the piezoelectric component 3 and the lever 4.

[0031] The other end of the lever 4 is engaged with the striker assembly 5. The striker assembly 5 includes a striker 501, a striker guide sleeve 502, a buffer spring 503, and a return spring 504. The striker 501 is sleeved in the striker guide sleeve 502 and the striker 501 can slide up and down. The return spring 504 is sleeved on the striker guide sleeve 502. The buffer spring 503 is sleeved between the striker 501 and the striker guide sleeve 502. The lower end of the buffer spring 503 contacts the striker guide sleeve 502, and the upper end of the buffer spring 503 contacts the striker 501. When the striker 501 is forced to press down, the buffer spring 503 prevents the direct impact between the striker 501 and the striker guide sleeve 502 and plays a buffering role. A spherical impact platform 402 is provided on the right bottom surface of the lever 4. Due to the provision of the spherical impact platform 402, the direct impact between the lever 4 and the striker 501 is avoided, and the service life of the lever 4 is prolonged.

[0032] During use, when the piezoelectric assembly 3 is powered on, the piezoelectric stack block 301 in the piezoelectric assembly 3 will undergo slight deformation, thereby generating a small displacement. Since the lever 4 is provided at the bottom of the piezoelectric stack block 301, the piezoelectric stack block 301 drives the lever 4 to press down and strike the striker 501. After the piezoelectric assembly 3 drives the lever 4 to strike the striker 501, the return spring 504 in the striker assembly 5 resets the lever 4. Specifically, the bottom end of the return spring 504 contacts the striker guide sleeve 502, and the top end of the return spring 504 contacts the lever 3. After the lever 3 strikes the striker 501, the return spring 504 pushes the lever 3 upward under the action of the elastic force to achieve reset.

[0033] Further, a locking screw 134 is provided on the valve body 1. The rod body of the locking screw 134 passes through the valve body 1 and is arranged in the accommodation chamber 102 to contact the positioning block 302. The locking screw 134 can move up and down to change the swing amplitude of the piezoelectric assembly 3, thereby changing the active stroke of the piezoelectric assembly 3.

[0034] In the description of the present invention, obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0035] Therefore, the above detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the present invention to be protected, but only represents the selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0036] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "middle", "upper", "lower", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.

[0037] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "arranged", "connected", "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection. It may be a mechanical connection or an electrical connection. It may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

Claims

1. A lever-type glue discharging valve body of a glue dispensing machine, characterized in that, It includes a valve body (1) and a valve body cover plate (101). An accommodation chamber (102) is formed between the valve body (1) and the valve body cover plate (101). A piezoelectric component (3), a lever (4), and a striker assembly (5) are provided in the accommodation chamber (102). An air inlet (111) and an air outlet (121) are formed on the valve body cover plate (101). An air cooling component (2) is connected to the air inlet (111) and the air outlet (121). The air cooling component (2) includes an air inlet pipe (201) and an air outlet pipe (202). A first filter screen (231) and a second filter screen (241) are further provided in the air inlet pipe (201).

2. The lever-type glue dispensing valve body of a glue dispenser according to claim 1, characterized in that, The air inlet pipe (201) includes a vertical pipe (211) and a bent pipe (221). The vertical pipe (211) is detachably connected to the bent pipe (221). The first filter screen (231) is arranged in the vertical pipe (211). The second filter screen (241) is arranged at the connection of the vertical pipe (211) and the bent pipe (221).

3. The lever type glue discharging valve body of a glue dotting machine according to claim 1, characterized in that, A first positioning post (123) and a second positioning post (133) are further provided in the accommodation chamber (102). The first positioning post (123) is arranged at the top of the accommodation chamber (102) to cooperate with the piezoelectric component (3). The second positioning post (133) is arranged at the bottom of the accommodation chamber (102). The lever (4) is arranged on the accommodation chamber (102).

4. A lever-type glue dispensing valve body of a glue dispenser according to claim 3, characterized in that, The piezoelectric component (3) includes a piezoelectric stack block (301) and a positioning block (302). The top of the positioning block (302) cooperates with the first positioning post (123). The bottom of the positioning block (302) is connected to the piezoelectric stack block (301). A spherical convex arc surface (311) is provided at the top end of the piezoelectric stack block (301). A spherical inner groove (312) adapted thereto is opened at the bottom end of the positioning block (302).

5. The lever-type glue dispensing valve body of a glue dispenser according to claim 4, characterized in that A locking screw (134) is further provided on the valve body (1). The rod body of the locking screw (134) penetrates into the accommodation chamber (102) and contacts the positioning block (302).

6. The lever-type glue dispensing valve body of a glue dispenser according to claim 4, characterized in that, The striker assembly (5) includes a striker (501), a striker guide sleeve (502), a buffer spring (503), and a return spring (504). The striker (501) is sleeved in the striker guide sleeve (502). The buffer spring (503) is sleeved between the striker (501) and the striker guide sleeve (502). The return spring (504) is sleeved on the striker guide sleeve (502).

7. The lever-type glue dispensing valve body of a glue dispenser according to claim 6, characterized in that, One end of the lever (4) cooperates with the piezoelectric component (3). A U-shaped groove (321) is opened at the lower end of the piezoelectric stack block (301). A U-shaped block (401) adapted thereto is opened on the lever (4).

8. A lever-type glue dispensing valve body of a glue dispenser according to claim 7, characterized in that The other end of the lever (4) cooperates with the striker assembly (5). A spherical impact table (402) is provided on the right bottom surface of the lever (4) for impacting the striker (501). The top surface of the return spring (504) abuts against the bottom surface of the lever (4) for resetting the lever (4).

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