TWI457182B - Dispensing apparatus - Google Patents

Description

Dispensing device

The present invention relates to a dispensing device.

Dispensing devices are commonly used in the manufacturing industry to apply fluid gelling materials, such as viscous resins, to a part to be machined for bonding to other parts. The dispensing device mainly includes a barrel and a dispenser. The barrel is filled with glue, and the compressed air enters the barrel through the valve, and the glue in the barrel is pushed into the dispenser through the discharge port at the lower end of the barrel. The dispenser includes a needle valve for accumulating glue and a needle for dispensing, and the control valve is connected to the needle valve for turning on or cutting off the glue supply.

However, the unstable working pressure of the compressed air will result in uneven flow rate of the glue, which makes the dispensing amount uneven and affects the dispensing accuracy. At the same time, after the traditional control valve cuts off the supply of glue, the residual glue in the needle will still slowly flow out from the needle, forming a "drawing" phenomenon. The "drawing" phenomenon wastes the raw materials, and the processed parts do not require contamination of the glued parts.

In view of this, it is necessary to provide a dispensing device with a high dispensing accuracy and a fast response speed.

A dispensing device includes a bracket, a slide rail disposed on the bracket, a motor, a screw driven by the motor, a slider disposed on the slide rail and screwed with the screw rod, a pusher piston fixed to the slider, and a fixing In the barrel of the bracket and the glue dispenser connected to the barrel, the barrel is formed to be useful a cavity for accommodating the glue and a discharge hole communicating with the cavity, and one end of the pusher piston is received in the cavity to act on the glue in the barrel, and the dispenser includes a needle valve and a needle disposed at one end of the needle valve, the needle A glue chamber is formed in the valve body, and a rubber inlet port is formed on the side wall of the needle valve, and the glue inlet is connected to the discharge hole. The glue dispenser further includes a pull rod and a valve core, and the pull rod is movable through the needle valve. The valve core is disposed in one end of the needle and is connected to one end of the pull rod. When the pull rod drives the valve core to move away from the needle, the glue inlet can be closed, and when the pull rod drives the spool to move toward the needle, the valve can be opened. Glue.

The above dispensing device drives the pusher piston to squeeze the glue in the barrel to make the glue enter the needle valve from the barrel, control the rotation angle of the motor to accurately control the dispensing amount, and improve the dispensing precision; When moving away from the direction of the needle, the pressure in the cavity of the capsule is reduced, and some of the glue in the needle will be sucked back into the cavity and no longer flow out, so the response of the gel is faster.

100‧‧‧ Dispensing device

20‧‧‧ bracket

21‧‧‧ Guide plate

23‧‧‧ Strengthening board

25‧‧‧Connecting parts

251‧‧‧connection hole

27‧‧‧First fixed plate

29‧‧‧Second fixed plate

291‧‧‧ card slot

292‧‧‧Fixed holes

40‧‧‧Drive components

41‧‧‧Motor

42‧‧‧Drive wheel

43‧‧‧ driven wheel

44‧‧‧ Belt

45‧‧‧Spindle

46‧‧‧ Slider

47‧‧‧Adapters

471‧‧‧First Transfer Department

472‧‧‧Second Transfer Department

473‧‧‧Transfer hole

474‧‧‧First connection hole

475‧‧‧Second connection hole

48‧‧‧Slide rails

49‧‧‧Slide saddle

60‧‧‧Feeding components

61‧‧‧ Fixed seat

611‧‧‧ end face

612‧‧‧ side

613‧‧‧ Avoiding holes

614‧‧‧First guide hole

615‧‧‧Second guiding hole

616‧‧‧Installation slot

62‧‧‧Bowl

621‧‧‧Cylinder

6211‧‧‧ Cavity

6212‧‧‧ openings

6213‧‧‧Drainage hole

622‧‧‧Director

623‧‧‧Installation Department

626‧‧‧guide slot

627‧‧‧screw

63‧‧‧Pushing piston

631‧‧‧ Rod

632‧‧‧

64‧‧‧guide bar

65‧‧‧Drawing tube

80‧‧‧ Dispensing components

81, 81a‧‧‧ dispenser

811‧‧‧needle valve

8112‧‧‧ Subject

8113‧‧‧First engagement department

8114‧‧‧Second engagement department

8115, 8115a‧‧ ‧ plastic cavity

8116‧‧‧Into the nozzle

8117‧‧‧First accommodation

8118‧‧‧Second housing

8121, 8121a‧‧‧ into the rubber road

8123, 8123a‧‧‧Inlet

8124, 8124a‧‧‧ gap

813, 813a‧‧ needles

815, 815a‧‧‧ lever

817, 817a‧‧ ‧ spool

83‧‧‧ drive parts

831‧‧‧ Ontology

833‧‧‧ piston rod

84‧‧‧needle guide

841‧‧‧ Fixed Department

843‧‧‧Protection Department

845‧‧‧ accommodating chamber

847‧‧‧through hole

85‧‧‧Fixed blocks

851‧‧‧through hole

852‧‧‧First Housing Department

853‧‧‧Second accommodating department

854‧‧‧Threaded holes

86‧‧‧Support

861‧‧‧Substrate

862‧‧‧First support plate

863‧‧‧second support plate

864‧‧ ‧ pinhole

865‧‧‧through hole

866, 867‧‧‧ fixing holes

87‧‧‧Connecting sleeve

871‧‧‧ fixed department

872‧‧‧Connecting Department

873‧‧‧First accommodating slot

874‧‧‧Second accommodating slot

875‧‧‧Threaded holes

88‧‧‧First lock firmware

881‧‧‧Rotating Department

883, 893 ‧ ‧ lock lever

89‧‧‧Second lock firmware

891‧‧‧ fixed end

895‧‧‧ nuts

1 is a schematic perspective view of a dispensing device according to a first embodiment of the present invention.

2 is a perspective exploded view of the dispensing device of FIG. 1.

Figure 3 is a schematic cross-sectional view taken along line III-III of Figure 1.

Figure 4 is an exploded perspective view of the dispensing assembly of the dispensing device of Figure 1.

Figure 5 is a schematic cross-sectional view taken along line V-V of Figure 2.

Figure 6 is a cross-sectional view taken along line VI-VI of Figure 2.

Figure 7 is an enlarged cross-sectional view showing the dispensing device of the dispensing device of Figure 2 in an operational state.

Figure 8 is a schematic cross-sectional view showing another working state of the dispenser of the dispensing device shown in Figure 2.

9 and 10 are schematic cross-sectional views showing different working states of the dispenser of the second embodiment of the present invention.

The dispensing device provided by the embodiment of the present invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 1 and FIG. 2 simultaneously, the dispensing device 100 of the first embodiment of the present invention includes a bracket 20, a driving assembly 40, a feeding assembly 60, and a dispensing assembly 80.

The bracket 20 includes a guide plate 21, a reinforcing plate 23, a connecting member 25, a first fixing plate 27, and a second fixing plate 29. The guide plate 21 is substantially rectangular. The reinforcing plate 23 is substantially triangular in shape and extends from one of the guide plates 21 to the vertical guide plate 21. The connecting member 25 is in the form of a block having a connecting hole 251 at one end thereof to connect the bracket 20 to the end of the robot arm. The first fixing plate 27 extends from the one end of the guide plate 21 and the reinforcing plate 23 to the vertical guide plate 21 and the reinforcing plate 23. The second fixing plate 29 is substantially elongated, and has an elongated slot 291 and a fixing hole 292 at one end of the second fixing plate 29. The reinforcing plate 23 and the second fixing plate 29 are both fixed at the other end of the connecting member 25, and the extending direction of the second fixing plate 29 is opposite to the extending direction of the reinforcing plate 23, so that the fixing hole 292 is located at the second fixing plate 29 away from the reinforcing plate. One of the 23 ends.

The drive assembly 40 includes a motor 41, a drive wheel 42, a driven wheel 43, a belt 44, a lead screw 45, a slider 46, an adapter 47, a slide rail 48, and a saddle 49. The motor 41 is fixed to the first fixing plate 27. The driving wheel 42 is fixedly coupled to a rotating shaft (not shown) of the motor 41 so as to be rotatable by the driving of the motor 41. The driven wheel 43 is coupled to the drive wheel 42 by a belt 44 such that it can rotate with the drive wheel 42. One end of the lead screw 45 is fixed to the axis of the driven wheel 43 and rotates together with the driven wheel 43. The slider 46 is screwed to the lead screw 45. The adapter 47 is generally L-shaped and includes a first adapter portion 471 and a second adapter portion perpendicular to the first adapter portion 471 472. The first adapter portion 471 defines an adapter hole 473 that engages with the slider 46 and a first connection hole 474 and a second connection hole 475 that are located at one end of the first adapter portion 471. The slider 46 is partially received in the through hole 473 and fixedly connected to the first adapter portion 471. The slide rail 48 is fixed to the guide plate 21 of the bracket 20 and faces the lead screw 45. The extending direction of the slide rail 48 is substantially parallel to the extending direction of the lead screw 45. The sliding saddle 49 is slidably disposed on the slide rail 48. The second adapter portion 472 of the adapter 47 is secured to the saddle 49 such that it can slide along the slide rail 48 with the saddle 49.

Referring to FIG. 3 together, the feeding assembly 60 includes a fixing base 61, a barrel 62, a pusher piston 63, a guide rod 64, and a discharge tube 65. The holder 61 is substantially block-shaped and has an end surface 611 and a side surface 612 adjacent to the end surface 611. A side avoiding hole 613 is defined in a side of the end surface 611 away from the side surface 612, and a first guiding hole 614 and a second guiding hole 615 are defined in a side of the side surface 612, the avoiding hole 613, the first guiding hole 614 and the second guiding hole Each of the 615 passes through the end surface 611 and an end surface opposite thereto. A mounting groove 616 extending from the vertical side 612 is formed on the side 612. The mounting groove 616 has a T-shaped cross section and penetrates the end surface of the fixing base 61 opposite to the end surface 611. The mounting groove 616 is in communication with the first guiding hole 614 and the second guiding hole 615.

The cartridge 62 includes a cylindrical body 621, a guide portion 622, and a mounting portion 623. The cylinder 621 is generally a hollow cylinder, and a cavity 6211 is formed therein to store the glue liquid. The end of the cylinder 621 is formed with an opening 6212 communicating with the cavity 6211. The cylinder 621 is formed with a discharge hole 6213 away from one end of the opening. . The guiding portion 622 is formed on one side of the cylindrical body 621, and is provided with a guiding groove 626. The mounting portion 623 is formed at one end of the cylindrical body 621 and the guide portion 622. The mounting portion 623 is substantially T-shaped, and is received in the mounting groove 616 and fixed to the fixing base 61 by screws 627. The first guiding hole 614 and the second guiding hole 615 respectively correspond to the opening 6212 and the guiding groove 626.

The pusher piston 63 includes a rod portion 631 and a plug portion 632 formed at one end of the rod portion 631. The plug portion 632 is received in the cavity 6211 and is in contact with the inner wall of the cavity 6211. The other end of the rod portion 631 protrudes from the opening 6212 and the first guiding hole 614 and is connected by the first connecting hole 474 of the first adapter portion 471. An adapter portion 471 is fixedly coupled. The guiding rod 64 is in the shape of a rod. One end of the guiding rod 64 is received in the guiding groove 626, and the other end protrudes from the guiding groove 626 and the second guiding hole 615 and passes through the second connecting hole 475 of the first adapter portion 471 and the first connecting portion 471. Fixed connection. One end of the discharge pipe 65 is connected to the discharge hole 6213.

Referring to FIGS. 4-7, the dispensing assembly 80 includes a dispenser 81 and a driver 83.

The dispenser 81 includes a needle valve 811, a needle 813, a tie rod 815, and a spool 817. The needle valve 811 is substantially a hollow cylinder, and the needle 813 is disposed at the lower end of the needle valve 811. The rod 815 is movably disposed at the upper end of the needle valve 811 and opposite to the needle 813. The spool 817 is disposed in the needle valve 811 and connected to one end of the rod 815. The needle valve 811 includes a main body 8112, a first engaging portion 8113 near one end of the needle 813, and a second engaging portion 8114 near the pull rod 815. The needle valve 811 includes a glue chamber 8115 and a feed nozzle 8116 that connects the side walls of the body 8112. The glue chamber 8115 is composed of a first receiving portion 8117 located in the main body 8112 and a second receiving portion 8118 located in the first engaging portion 8113. The first receiving portion 8117 is substantially conical in shape with a narrow upper and lower width, and the second receiving portion 8118 is substantially cylindrical. The feeding nozzle 8116 is provided with a rubberizing lane 8121 communicating with the first receiving portion 8117 of the adhesive cavity 8115. The portion where the rubber passage 8121 intersects with the first housing portion 8117 is a glue inlet 8123.

The top end of the pull rod 815 passes through the needle valve 811 and protrudes outside the needle valve 811. The spool 817 is located in the adhesive cavity 8115 and has a shape substantially conical to the first receiving portion 8117, that is, its width gradually increases toward the needle 813. The maximum width of the spool 817 is slightly smaller than the diameter of the second receiving portion 8118, that is, a gap 8124 is formed between the portion where the width of the spool 817 is the largest and the second receiving portion 8118. The glue can pass through the gap from the first receiving portion 8117 The 8124 flows into the second housing portion 8118.

The driving member 83 is a cylinder, and includes a body 831 and a piston rod 833 penetrating the body 831.

The dispensing assembly 80 also includes a needle guide 84 for protecting the needle 813 and a fixed block 85 for securing the needle guide 84. The needle guide 84 is shaped like a gyro and includes a cylindrical fixing portion 841 and a conical protective portion 843. A receiving cavity 845 for receiving the first engaging portion 8113 of the needle valve 811 is defined in the fixing portion 841, and a through hole 847 through which the needle 813 is inserted is defined in the protecting portion 843. The fixing block 85 is substantially block-shaped and can be fixed to the second fixing plate 29 by two screws (not shown) passing through the fixing holes 292. A through hole 851 is defined in the fixing block 85. The through hole 851 includes a first receiving portion 852 for receiving the needle valve 811 and a second receiving portion 853 for fixing the needle guide 84. A threaded hole 854 communicating with the first receiving portion 852 of the through hole 851 is also formed in a side surface of the fixing block 85.

The dispensing assembly 80 also includes a support member 86 for supporting the drive member 83, a coupling sleeve 87 for securing the pull rod 815, a first locking member 88, and a second locking member 89.

The support member 86 includes a substrate 861, a first support plate 862 extending perpendicularly from a central portion of the substrate 861, and a second support plate 863 extending perpendicularly from a bottom of the substrate 861. A pin hole 864 is formed in the position of the substrate 861 near the top. A through hole 865 for accommodating the piston rod 833 of the driving member 83 is defined in the middle of the first supporting plate 862. The first supporting plate 862 is further provided with four fixing holes 866 around the through hole 865. The driving member 83 can be fixedly mounted on the first supporting plate 862 by four screws (not shown) passing through the fixing holes 866. The second supporting plate 863 is provided with a fixing hole 867 for accommodating the second engaging portion 8114 of the needle valve 811.

The connecting sleeve 87 is substantially cylindrical, and includes a fixing portion 871 and a joint of upper and lower combinations Department 872. A first receiving groove 873 is defined in the fixing portion 871, and the piston rod 833 of the driving member 83 can be caught in the first receiving groove 873 and fixed to the connecting sleeve 87. A second receiving groove 874 for accommodating the rod 815 is defined in the connecting portion 872. A threaded hole 875 communicating with the second receiving groove 874 is also formed in a side surface of the connecting portion 872. The first locking member 88 includes a disk-shaped rotating portion 881 and a threaded locking lever 883. The lock lever 883 can enter the threaded hole 875 to abut the pull rod 815.

The second locking member 89 includes a fixed end 891 that conforms to the shape of the pin hole 864, a threaded locking lever 893, and a nut 895. The locking lever 893 can pass through the pin hole 864 and the slot 291 on the second fixing plate 29 and then screw with the nut 895 to fix the support member 86 to the second fixing plate 29.

When assembling, the driving member 83 is first fixed to the support member 86 by screws. The connecting sleeve 87 is fixed to the piston rod 833 of the driving member 83. After the needle guide 84 is engaged and fixed in the second receiving portion 853 of the fixing block 85, the fixing block 85 is fixed to the second fixing plate 29 by screws (not shown).

The rod 815 of the dispenser 81 passes through the fixing hole 867 and enters the second receiving groove 874 of the connecting sleeve 87, and then the second engaging portion 8114 of the needle valve 811 of the dispenser 81 is engaged and fixed to the fixing hole. Within 867. The rotating portion 881 of the first locking member 88 is rotated such that the locking lever 883 of the first locking member 88 enters the threaded hole 875 to abut against the tie rod 815. Thus, the pull rod 815 is fixed to the piston rod 833 of the driving member 83 by the connecting sleeve 87, and the piston rod 833 can drive the valve core 817 to reciprocate in the needle valve 811 of the dispenser 81.

The locking lever 893 of the second locking member 89 passes through the pin hole 864 of the support member 86 and the slot 291 of the second fixing plate 29 to be screwed with the nut 895 to fix the supporting member 86 together with the fixing member 86. The gluer 81 and the driving member 83 are fixed together on the second fixing plate 29, and the first engaging portion 8113 of the needle valve 811 of the dispenser 81 is engaged with the first fixing block 85. The inside of the accommodating portion 852 and the needle 813 are passed through the through hole 847 of the needle guide 84 to protrude outside the needle guide 84. A screw (not shown) is used to enter the threaded hole 854 of the fixing block 85 to abut against the first engaging portion 8113 of the needle valve 811. Thereby, the dispenser 81 is relatively firmly fixed between the fixed block 85 and the second support plate 863. The discharge pipe 65 and the feed nozzle 8116 are connected using a hose. The dispensing device 100 is assembled.

In use, the motor 41 drives the lead screw 45 to rotate, thereby causing the slider 46 to drive the adapter member 47 to slide along the slide rail 48. The plug portion 632 of the pusher piston 63 fixed to the adapter 47 moves downward along the cavity 6211 to squeeze the glue, so that the glue flows from the cavity 6211 into the discharge pipe 65 and enters the glue through the feed nozzle 8116. 81. When the dispenser 81 is in the open state shown in FIG. 7, the spool 817 is located at a position between the first housing portion 8117 and the second housing portion 8118. At this time, the valve core 817 does not close the rubber inlet 8123, and the glue can flow from the rubber passage 8121 into the first receiving portion 8117, and enter the second receiving portion 8118 via the gap 8124 between the valve core 817 and the second receiving portion 8118. Finally, spit out through the needle 813.

Referring to FIG. 8 , when it is necessary to stop the glue, the motor 41 stops rotating, and the push piston 63 no longer squeezes the glue, and the piston rod 833 of the driving member 83 drives the rod 815 to move upwards rapidly, thereby driving the spool 817 away. The direction of the needle 813 moves into the first housing portion 8117. When the side wall of the spool 817 abuts against the side wall of the first receiving portion 8117, the spool 817 stops moving and closes the glue inlet 8123. During this process, the pressure of the valve core 817 on the glue in the first receiving portion 8117 is relatively large, prompting a portion of the glue to enter the rubber passage 8121, and the pressure in the second receiving portion 8118 is reduced to be located in the needle 813. The glue has a certain sucking effect, so the glue originally flowing out of the needle 813 is quickly cut off and no longer flows out. When it is necessary to re-apply, the piston rod 833 of the driving member 83 drives the rod 815 to move downward, and drives the valve core 817 to move toward the needle 813 to restore the open state shown in FIG.

After the dispensing device 100 has been in use for a period of time, the glue in the dispenser 81 may solidify and block circulation. In this case, the new dispenser 81 should be replaced in time. When replacing, the screw can be rotated in the reverse direction so that the screw no longer abuts against the first engaging portion 8113 of the needle valve 811. The support member 86 is then removed from the bracket 20 to separate the dispenser 81 from the fixed block 85. Finally, the first lock 88 is reversely rotated so that the lock lever 883 is no longer engaged with the tie rod 815. At this time, the dispenser 81 can be removed from the second support plate 863 more easily. After replacing the new dispenser 81, the dispensing operation can be easily restored by performing the reverse operation on the above-described disassembly steps.

Referring to FIG. 9 and FIG. 10 together, the dispenser 81a of the second embodiment of the present invention is substantially the same as the dispenser 81 of the first embodiment, except that the shape of the adhesive cavity 8115a is cylindrical. The shape of the valve core 817a is also cylindrical, and the valve core 817a is located in the gap 8124a between the side wall of one of the rubber inlets 8123a and the side wall of the resin chamber 8115a, and the valve core 817a is adjacent to one side wall of the rubber inlet 8123a. The side walls of the cavity 8115a are always in contact. When the dispenser 81a is in the open state shown in FIG. 9, the valve core 817a does not close the rubber inlet 8123a, and the glue can flow from the rubber passage 8121a into the upper portion of the adhesive cavity 8115a and enter the adhesive cavity 8115a via the gap 8124a. The lower part is finally spit out through the needle 813a. When it is necessary to stop the dispensing, the pull rod 815a moves up quickly, thereby causing the spool 817a to move away from the needle 813a. When the upper end of the spool 817a comes into contact with the top of the caulking chamber 8115a, the spool 817a stops moving and closes the inlet port 8123a. During this process, the pressure in the glue chamber 8115a is reduced to produce a certain suck back effect on the glue located in the needle 813a, so the glue originally flowing out of the needle 813a is quickly cut off and no longer flows out. When re-feeding is required, the spool 817a moves toward the needle 813a to return to the open state shown in FIG.

It can be understood that the first locker 88 and the second locker 89 are also not limited to the above embodiments. The structure in which the threaded rod and the screw hole are meshed with each other may be, for example, a pinning structure such as a pin or a pin hole. For example, the fixing block 85 and the second supporting plate 863 are respectively provided with a structure (such as a spring piece or an elastic card slot) that can be engaged with the dispenser 81, and the first locking member 88 can also be omitted. If the dispenser 81 is not required to be replaced, the fixed block 85 and the second support plate 863 can also be omitted. If the pull rod 815 is driven manually, the drive member 83 and the support member 86 can also be omitted. At this time, the dispenser 81 can be directly fixed to the bracket 20 by screwing, gluing, riveting or the like.

The needle valve 811 is also not limited to the case described in the first embodiment and the second embodiment. The shape of the plastic cavity 8115 may also be square, elliptical or the like.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be included in the following claims.

100‧‧‧ Dispensing device

20‧‧‧ bracket

21‧‧‧ Guide plate

23‧‧‧ Strengthening board

25‧‧‧Connecting parts

251‧‧‧connection hole

27‧‧‧First fixed plate

29‧‧‧Second fixed plate

Claims (10)

A dispensing device includes a bracket, a barrel fixed to the bracket, and a dispenser connected to the barrel, wherein a cavity for accommodating the glue liquid and a discharge hole communicating with the cavity are formed in the barrel The dispensing device includes a needle valve and a needle disposed at one end of the needle valve, wherein the needle valve has a glue chamber formed therein, and the inlet side of the needle valve is provided with a glue inlet communicating with the cavity, the inlet The improvement is that the dispensing device further includes a slide rail disposed on the bracket, a motor, a screw driven by the motor, a slider disposed on the slide rail and screwed with the screw rod a pusher piston fixed to the slider, the pusher piston is received at one end of the pusher piston to act on the glue in the cartridge; the dispenser further includes a pull rod and a valve core, the pull rod is movably disposed through The needle valve is opposite to one end of the needle, and the valve core is disposed in the plastic cavity and connected to one end of the pull rod. When the pull rod drives the valve core to move away from the needle, the glue inlet can be closed, when the pull rod is driven The glue inlet can be opened when the spool moves toward the needle. The dispensing device of claim 1, wherein the shape of the valve core is tapered, and the width of the valve core is gradually increased in a direction close to the needle, and the plastic cavity of the needle valve includes a tapered first receiving portion and a second receiving portion communicating with the first receiving portion, the feeding port is in communication with the first receiving portion, and the valve core is disposed between the valve body and the second receiving portion Allow gaps in the flow of glue. The dispensing device of claim 1, wherein the valve core has a cylindrical shape, and the plastic cavity of the needle valve is cylindrical, and the valve core is away from a side wall of the rubber inlet and the adhesive A gap between the side walls of the chamber is allowed to flow through the glue, and the valve core is in contact with the side wall of one of the glue inlets and the side wall of the resin chamber. The dispensing device of claim 1, wherein the dispensing device further comprises a fixing block fixed to the bracket and a needle guide, and the fixing block is provided with a through hole for fixing the needle guide. The dispenser is detachably secured within the through hole and the needle passes through the needle guide. The dispensing device of claim 4, wherein the through hole comprises a first receiving portion for accommodating the dispenser and a second receiving portion for fixing the needle guide, the fixing A threaded hole communicating with the first receiving portion is further formed on the side of the block to fix the dispenser to the fixing block using a screw. The dispensing device of claim 1, wherein the dispensing device further comprises a driving member fixed to the bracket and connected to the pull rod to drive the pull rod to reciprocate in the adhesive cavity. The dispensing device of claim 6, wherein the driving member is a cylinder, the cylinder comprises a piston rod, and the dispensing device further comprises a connecting sleeve fixed to the piston rod, the rod is detachably fixed On the connecting sleeve. The dispensing device of claim 7, wherein the connecting sleeve is provided with a first receiving groove engaged with the piston rod and a second receiving groove for receiving the connecting rod, the connecting sleeve The side surface is further provided with a threaded hole communicating with the second receiving groove, the dispensing device further comprising a threaded first locking member, the first locking member entering the threaded hole and abutting the pull rod. The dispensing device of claim 6, wherein the dispensing device further comprises a support member for supporting the driving member, the support member is detachably fixed to the bracket, and the driving member is mounted on the supporting member . The dispensing device of claim 1, wherein the dispensing device further comprises a guiding rod, and a guiding portion is formed on one side of the barrel, the guiding portion is provided with a guiding groove, and the guiding rod is received at one end of the guiding rod The groove has the other end protruding from the guiding groove and fixed to the slider.