Screw valve and dispensing equipment

Abstract

The screw valve comprises a valve body, a glue inlet part, a screw rod, a thrust piece, a bearing and a driving device, the valve body is provided with a containing cavity, one end of the containing cavity is provided with a glue outlet, the glue inlet part is communicated with the containing cavity, the screw rod is arranged in the containing cavity, a shaft shoulder part is arranged on the screw rod, and the thrust piece is arranged on the bearing. The shaft shoulder part is provided with a first surface and a second surface in the axial direction of the screw rod, the thrust part is arranged on the screw rod in a sleeving mode and abuts against the first surface, the thrust part is fixedly arranged on the valve body in the axial direction, the bearing is arranged on the screw rod in a sleeving mode and abuts against the second surface, the bearing is fixedly arranged on the valve body in the axial direction, and the bearing and the thrust part are used for jointly clamping the shaft shoulder part. The screw is fixed relative to the valve body in the axial direction, and the driving device is connected to the screw. By the adoption of the scheme, the situation that the screw axially moves can be reduced, the stability of the dispensing amount of the screw valve is improved, and meanwhile the service life of the screw valve can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of dispensing equipment, in particular to a screw valve and a dispensing equipment. Background Art

[0002] Dispensing equipment is a special automated machine for controlling fluids and dispensing or coating fluids on the surface or inside of products, and is widely used in industrial manufacturing, automotive manufacturing, electronic manufacturing and other fields.

[0003] In the related art, a screw valve is usually used for dispensing in dispensing equipment. The screw valve mainly consists of a valve body, a motor, a screw and a nozzle, etc. After injecting glue into the valve body, the motor drives the screw to rotate, so as to push the glue in the valve body out of the nozzle, realizing the dispensing function of the screw valve. However, during the actual use of the screw valve, the screw is prone to loosen in the valve body, and the screw may move axially. This not only easily leads to unstable dispensing amount, but also may cause the screw and other components to be easily worn, affecting the service life of the screw valve. Summary of the Utility Model

[0004] The embodiments of the utility model disclose a screw valve and a dispensing equipment, which can reduce the axial movement of the screw, improve the stability of the dispensing amount of the screw valve, and at the same time help to improve the service life of the screw valve.

[0005] To achieve the above object, in the first aspect, the utility model discloses a screw valve, comprising:

[0006] A valve body, the valve body is provided with a receiving cavity, and one end of the receiving cavity is provided with a glue outlet;

[0007] A glue inlet part, the glue inlet part is communicated with the receiving cavity, and the glue inlet part is used for supplying glue into the receiving cavity;

[0008] A screw, the screw is arranged in the receiving cavity, an axial shoulder is arranged on the screw, and the axial shoulder has a first surface and a second surface along the axial direction of the screw, and the first surface is closer to the glue outlet than the second surface;

[0009] A thrust piece, the thrust piece is sleeved on the screw and abuts against the first surface, and the thrust piece is axially fixed on the valve body;

[0010] A bearing, the bearing is sleeved on the screw and abuts against the second surface, and the bearing is axially fixed on the valve body. The bearing and the thrust piece are used to jointly clamp the axial shoulder so that the screw is axially fixed relative to the valve body; and

[0011] A driving device is connected to the screw rod, and is used to drive the screw rod to rotate so that the glue in the accommodating cavity is discharged from the glue outlet.

[0012] As an optional implementation, in an embodiment of the first aspect of the present utility model, the thrust member is clamped and fixed to the valve body in the axial direction.

[0013] As an optional implementation manner, in an embodiment of the first aspect of the present utility model, the thrust member is configured as a rigid member.

[0014] As an optional embodiment, in an embodiment of the first aspect of the present utility model, the screw valve also includes a positioning member, which is fixed to the valve body in the axial direction and abuts against the side of the thrust member facing away from the shaft shoulder, so that the thrust member is fixed relative to the valve body in the axial direction.

[0015] As an optional embodiment, in an embodiment of the first aspect of the present utility model, the positioning piece is sleeved on the screw, and the positioning piece is provided with an installation cavity running through itself along the axial direction. The screw valve also includes a first sealing structure, which is provided in the installation cavity, and the first sealing structure is sleeved on the screw, and the first sealing structure is used to seal the installation cavity in the axial direction.

[0016] As an optional embodiment, in an embodiment of the first aspect of the present utility model, an installation groove is provided on the outer periphery of the positioning member, and the installation groove is arranged around the axial direction. The screw valve also includes a second sealing structure, and the second sealing structure is arranged in the installation groove. The second sealing structure is used to seal the installation groove in the axial direction.

[0017] As an optional embodiment, in the embodiment of the first aspect of the present utility model, the positioning member is provided with a first locking portion, and the wall surface of the accommodating cavity is provided with a second locking portion, the first locking portion is locked and connected to the second locking portion, so that the positioning member is fixed relative to the valve body in the axial direction, and one of the first locking portion and the second locking portion is a convex portion, and the other is a concave portion.

[0018] As an optional implementation, in an embodiment of the first aspect of the present utility model, the valve body includes a first shell and a second shell connected to each other, the first shell and the second shell jointly enclose the accommodating chamber, the glue inlet portion is provided at an end of the first shell close to the glue outlet, the thrust member is fixedly provided to the second shell in the axial direction, and the bearing is fixedly provided to the second shell in the axial direction;

[0019] The second engaging portion is a recessed portion, and the second engaging portion is formed on the inner wall surface of the first shell and / or the inner wall surface of the second shell.

[0020] As an optional embodiment, in an embodiment of the first aspect of the present utility model, the thrust member includes a main body and a raised portion, the raised portion is provided on a side of the main body facing the first surface, the raised portion abuts against the first surface, a stepped surface is formed between the raised portion and the main body, and the stepped surface is provided facing the first surface;

[0021] An inner convex portion is provided on the wall surface of the accommodating cavity, and the inner convex portion abuts against the step surface.

[0022] As an optional embodiment, in an embodiment of the first aspect of the present invention, the wall surface of the accommodating cavity is provided with an inner convex portion, and in the axial direction, one side of the inner convex portion abuts against the thrust piece, and the other side of the inner convex portion abuts against the bearing.

[0023] As an optional implementation, in an embodiment of the first aspect of the present utility model, the valve body includes a first shell, a second shell, and a third shell, the second shell is connected between the first shell and the third shell, the first shell, the second shell, and the third shell together form the accommodating chamber, the glue inlet portion is provided at an end of the first shell close to the glue outlet, the thrust member is fixedly provided to the second shell in the axial direction, and the bearing is fixedly provided to the second shell in the axial direction;

[0024] The third housing has a flange on one side facing the second housing. The flange is arranged around the axial direction and abuts against a side of the bearing away from the shoulder portion, so that the bearing is fixed relative to the third housing in the axial direction.

[0025] In a second aspect, the present utility model further discloses a dispensing device, which includes the screw valve as described in the first aspect of the above utility model.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] The screw valve and the dispensing device provided by the embodiment of the present utility model enable glue to be introduced into the accommodation cavity from the glue inlet part. The driving device can drive the screw to rotate around its own axial direction (this rotation is defined as the forward rotation of the screw), so as to discharge the glue in the accommodation cavity from the glue outlet, realizing the glue discharging function of the screw valve. The driving device can also drive the screw to rotate in the reverse direction, so as to suck back the glue near the glue outlet into the accommodation cavity, realizing the back suction function of the screw valve, which can prevent glue dripping or wire drawing, improve the stability of the glue discharge amount of the screw valve, and moreover, can prevent the glue from coagulating at the glue outlet and causing the glue outlet to be blocked. By providing a bearing and a thrust piece and arranging a shaft shoulder on the screw, the bearing can support the screw and reduce the friction force received when the screw rotates. At the same time, the bearing abuts against the second surface of the shaft shoulder, the thrust piece abuts against the first surface of the shaft shoulder, and both the bearing and the thrust piece are fixedly arranged axially relative to the valve body. The bearing and the thrust piece can jointly clamp the shaft shoulder, so that the screw is fixed axially relative to the valve body, reducing the situation of axial movement of the screw, improving the stability of the dispensing amount of the screw valve, and at the same time being beneficial to improving the service life of the screw valve. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings.

[0029] Figure 1 is a schematic structural diagram of the screw valve disclosed in the first aspect of the embodiment of the present application;

[0030] Figure 2 is Figure 1 a sectional view of the screw valve;

[0031] Figure 3 is Figure 2 an enlarged view of part A;

[0032] Figure 4 is a three-dimensional structural diagram of the screw disclosed in the first aspect of the embodiment of the present application;

[0033] Figure 5 is a three-dimensional structural diagram of the thrust piece disclosed in the first aspect of the embodiment of the present application;

[0034] Figure 6 is a three-dimensional structural diagram of the positioning piece disclosed in the first aspect of the embodiment of the present application;

[0035] Figure 7 is a schematic structural diagram of the dispensing device disclosed in the second aspect of the embodiment of the present application.

[0036] Icons: 1. Screw valve; 10. Valve body; 100. First housing; 101. Second housing; 1010. Inner convex part; 102. Third housing; 1020. First part; 1021. Second part; 1022. Flange part; 103. Accommodation cavity; 104. Glue outlet; 105. Second engaging part; 11. Glue inlet part; 110. Glue inlet pipe; 111. Luer connector; 12. Screw; 120. Axle shoulder; 1200. First surface; 1201. Second surface; 13. Thrust piece; 130. Main body part; 131. Protrusion part; 132. Step surface; 14. Bearing; 15. Driving device; 150. Motor; 151. Coupling; 152. Coupling key; 16. Positioning piece; 160. Installation cavity; 161. First engaging part; 162. Installation groove; 17. First sealing structure; 170. Skeleton oil seal; 171. V-packing seal; 18. Second sealing structure; 2. Dispensing equipment; X. First direction; Y. Second direction. Detailed implementation manners

[0037] 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. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] Next, the technical solutions of the present invention will be further described in conjunction with the embodiments and the accompanying drawings.

[0039] Please refer to Figures 1 to 3, in the first aspect of the embodiment of the present utility model, a screw valve 1 is provided. The screw valve 1 includes a valve body 10, a glue inlet part 11, a screw 12, a thrust piece 13, a bearing 14 and a driving device 15. The valve body 10 is provided with a receiving cavity 103. One end of the receiving cavity 103 is provided with a glue outlet 104. The glue inlet part 11 communicates with the receiving cavity 103. The glue inlet part 11 is used for supplying glue into the receiving cavity 103. The screw 12 is arranged in the receiving cavity 103. An axial shoulder 120 is provided on the screw 12. The axial shoulder 120 has a first surface 1200 and a second surface 1201 along the axial direction of the screw 12. The first surface 1200 is closer to the glue outlet 104 than the second surface 1201. The thrust piece 13 is sleeved on the screw 12 and abuts against the first surface 1200. The thrust piece 13 is axially fixed to the valve body 10. The bearing 14 is sleeved on the screw 12 and abuts against the second surface 1201. The bearing 14 is axially fixed to the valve body 10. The bearing 14 and the thrust piece 13 are used to jointly clamp the axial shoulder 120 so that the screw 12 is axially fixed relative to the valve body 10. The driving device 15 is connected to the screw 12. The driving device 15 is used to drive the screw 12 to rotate so that the glue in the receiving cavity 103 is discharged or sucked back from the glue outlet 104.

[0040] For the screw valve 1 provided in the first aspect of the embodiment of the present utility model, glue can be introduced into the receiving cavity 103 from the glue inlet part 11. The driving device 15 can drive the screw 12 to rotate around its own axial direction, so as to discharge the glue in the receiving cavity 103 from the glue outlet 104 (hereinafter, this rotation is defined as the forward rotation of the screw 12), realizing the glue discharging function of the screw valve 1. The driving device 15 can also drive the screw 12 to rotate reversely, so as to suck back the glue near the glue outlet 104 into the receiving cavity 103, realizing the glue sucking back function of the screw valve 1. It can prevent glue dripping or wire drawing, improve the stability of the glue discharging amount of the screw valve 1, and can prevent glue from condensing at the glue outlet 104 and causing blockage of the glue outlet 104. By providing the bearing 14 and the thrust piece 13 and arranging the axial shoulder 120 on the screw 12, the bearing 14 can support the screw 12 and reduce the frictional force received when the screw 12 rotates. At the same time, the bearing 14 abuts against the second surface 1201 of the axial shoulder 120, and the thrust piece 13 abuts against the first surface 1200 of the axial shoulder 120. And both the bearing 14 and the thrust piece 13 are axially fixed relative to the valve body 10. The bearing 14 and the thrust piece 13 can jointly clamp the axial shoulder 120, making the screw 12 axially fixed relative to the valve body 10, reducing the situation of axial movement of the screw 12, improving the stability of the glue discharging amount of the screw valve 1, and at the same time being beneficial to improving the service life of the screw valve 1. In addition, both the bearing 14 and the thrust piece 13 are sleeved on the rotating shaft, that is, both the bearing 14 and the thrust piece 13 are annular structures, having a large contact area with the first surface 1200 and the second surface 1201 of the axial shoulder 120, and can improve the stability of the fixing of the screw 12 relative to the valve body 10 in the axial direction by the bearing 14 and the thrust piece 13.

[0041] Optionally, the screw 12 can be a central screw, an eccentric screw, etc., and can be specifically selected according to the actual situation, and is not specifically limited in this embodiment.

[0042] When the screw 12 is an eccentric screw 12, axial movement of the screw 12 is likely to occur when switching between the forward rotation and the reverse rotation of the screw 12. Based on this, the design of the present application can reduce the occurrence of axial movement of the screw 12, improve the stability of the dispensing amount of the screw valve 1, and at the same time is beneficial to improving the service life of the screw valve 1, and can also improve the sealing performance during back suction, and improve the effect and efficiency of back suction.

[0043] In some embodiments, the glue inlet portion 11 is provided at one end of the valve body 10 close to the glue outlet 104. This can facilitate the screw 12 to discharge the glue entering the accommodation cavity 103 from the glue inlet portion 11 from the glue outlet 104.

[0044] Optionally, the glue inlet portion 11 can be a through hole provided on the valve body 10 and communicating with the accommodation cavity 103, or can include a glue inlet pipe 110 communicating with the accommodation cavity 103 and a luer connector 111 provided on the glue inlet pipe 110, and can be specifically selected according to the actual situation, and is not specifically limited in this embodiment.

[0045] Optionally, the shaft shoulder 120 can be integrally formed with the screw 12, or the shaft shoulder 120 can also be a separate component. For example, the shaft shoulder 120 is an annular structure fixedly provided on the screw 12, and can be specifically selected according to the actual situation, and is not specifically limited in this embodiment.

[0046] In this embodiment, since the screw 12 is blocked by the thrust member 13 in the direction of the first surface 1200 facing the thrust member 13 (hereinafter this direction is defined as the first direction X, and the first direction X is parallel to the axial direction), and at the same time, the screw 12 is blocked by the bearing 14 in the direction of the second surface 1201 facing the bearing 14 (hereinafter this direction is defined as the second direction Y, and the second direction Y is parallel to the axial direction and opposite to the first direction X), therefore, the screw 12 being axially fixed relative to the valve body 10 means that the screw 12 is fixed relative to the valve body 10 in both the first direction X and the second direction Y.

[0047] In this embodiment, since the thrust member 13 needs to block the movement of the screw 12 in the first direction X, the thrust member 13 being fixedly provided on the valve body 10 in the axial direction means that the thrust member 13 is fixed relative to the valve body 10 at least in the first direction X, that is, the thrust member 13 can be fixed relative to the valve body 10 only in the first direction X and not fixed relative to the valve body 10 in the second direction Y, or can be fixed relative to the valve body 10 in both the first direction X and the second direction Y.

[0048] Please refer to Figures 3 to 6The specific manner in which the thrust member 13 is fixed to the valve body 10 in the axial direction will be briefly described below.

[0049] In some embodiments, the thrust member 13 is axially fixedly engaged with the valve body 10. By axially fixing the thrust member 13 to the valve body 10, the thrust member 13 can be better fixed axially relative to the valve body 10, thereby enabling the thrust member 13 to better block the movement of the screw 12 in the first direction X.

[0050] Optionally, the thrust member 13 and the valve body 10 can be clamped together by the structure of the thrust member 13 itself (for example, a protrusion or a depression) and the valve body 10, or the thrust member 13 and the valve body 10 can be clamped together by additionally providing other components. The specific selection can be made according to actual conditions and is not specifically limited in this embodiment.

[0051] In some embodiments, the screw valve 1 further includes a positioning member 16, which is axially fixed to the valve body 10 and abuts against a surface of the thrust member 13 facing away from the shaft shoulder 120, thereby fixing the thrust member 13 axially relative to the valve body 10. Thus, the positioning member 16 can block movement of the thrust member 13 in the first direction X, thereby fixing the thrust member 13 relative to the valve body 10 in the first direction X, and further fixing the screw 12 relative to the valve body 10 in the first direction X.

[0052] Optionally, the positioning member 16 may be integrally formed with the valve body 10 , or the positioning member 16 may be a separate component. The specific selection may be made according to actual conditions and is not specifically limited in this embodiment.

[0053] Optionally, the positioning member 16 may be a block-shaped structure protruding from the inner wall surface of the accommodating cavity 103 , or may be an annular structure sleeved on the screw 12 . The specific selection may be made according to actual conditions and is not specifically limited in this embodiment.

[0054] In some embodiments, the positioning member 16 is sleeved on the screw 12, and the positioning member 16 is provided with an installation cavity 160 that penetrates itself axially. The screw valve 1 also includes a first sealing structure 17, which is provided in the installation cavity 160, and the first sealing structure 17 is sleeved on the screw 12. The first sealing structure 17 is used to seal the installation cavity 160 in the axial direction.

[0055] Thus, the positioning member 16 is an annular structure sleeved around the screw 12, creating a large contact area with the thrust member 13. This provides relatively stable support for the thrust member 13, effectively securing the thrust member 13 relative to the valve body 10 in the first direction X. Furthermore, by disposing a first sealing structure 17 within the mounting cavity 160 of the positioning member 16, the first sealing structure 17 prevents axial fluid leakage between the positioning member 16 and the screw 12, thereby reducing the risk of glue leaking into components such as the bearing 14 and the drive device 15, which could affect the normal operation of the screw valve 1. Furthermore, the positioning member 16 not only axially positions the thrust member 13 but also accommodates the first sealing structure 17, enabling structural reuse of the positioning member 16 and simplifying the structural design of the screw valve 1.

[0056] In some embodiments, the first sealing structure 17 includes a skeleton oil seal 170 and a diaphragm seal 171. Both the skeleton oil seal 170 and the diaphragm seal 171 are disposed within the mounting cavity 160, with the diaphragm seal 171 located on the side of the skeleton oil seal 170 facing away from the thrust member 13. This allows the skeleton oil seal 170 to maintain its shape and tension, isolating lubricated components of the screw 12 (e.g., the bearing 14) from the external environment and preventing lubricant leakage. The diaphragm seal 171 is a high-performance seal that effectively prevents axial fluid leakage between the positioning member 16 and the screw 12, thereby reducing the risk of glue leaking into components such as the bearing 14 and the drive device 15, which could affect the normal operation of the screw valve 1.

[0057] In some embodiments, the outer periphery of the positioning member 16 is provided with a mounting groove 162, which is arranged axially around the positioning member 16. The screw valve 1 further includes a second sealing structure 18, which is disposed in the mounting groove 162 and is used to axially seal the mounting groove 162. Thus, the mounting groove 162 on the positioning member 16 can provide space for the second sealing structure 18 to be installed, and the second sealing structure 18 can axially seal the mounting groove 162, thereby preventing fluid from leaking axially between the positioning member 16 and the valve body 10. This further reduces the possibility of glue leaking into components such as the bearing 14 and the drive device 15, which could affect the normal use of the screw valve 1.

[0058] In some embodiments, the positioning member 16 is provided with a first engaging portion 161, and the wall surface of the accommodating cavity 103 is provided with a second engaging portion 105. The first engaging portion 161 is engaged with the second engaging portion 105 to secure the positioning member 16 axially relative to the valve body 10. One of the first engaging portion 161 and the second engaging portion 105 is a convex portion, and the other is a concave portion. Thus, through the engaging connection between the first engaging portion 161 and the second engaging portion 105, i.e., the engaging connection between the convex portion and the concave portion, the positioning member 16 can be secured relative to the valve body 10 in both the first direction X and the second direction Y, thereby securing the thrust member 13 relative to the valve body 10 in the first direction X.

[0059] In some embodiments, such as Figure 2 As shown, the valve body 10 includes a first shell 100 and a second shell 101 connected to each other. The first shell 100 and the second shell 101 together enclose a accommodating cavity 103. The glue inlet portion 11 is provided at one end of the first shell 100 close to the glue outlet 104. The thrust member 13 is axially fixed to the second shell 101, and the bearing 14 is axially fixed to the second shell 101; the second clamping portion 105 is a recessed portion, and the inner wall surface of the first shell 100 and / or the inner wall surface of the second shell 101 are formed with the second clamping portion 105.

[0060] In this embodiment, the second locking portion 105 is formed on the inner wall surface of the first shell 100 and / or the inner wall surface of the second shell 101, which means that a recess can be provided only on the inner wall surface of the first shell 100, so that the second locking portion 105 is formed on the inner wall surface of the first shell 100, or a recess can be provided only on the inner wall surface of the second shell 101, so that the second locking portion 105 is formed on the inner wall surface of the second shell 101, or a smaller recess can be provided on the inner wall surface of the first shell 100 and the second shell 101 respectively. When the first shell 100 and the second shell 101 are connected, the two smaller recesses are interconnected and combined to form a larger recess, that is, the second locking portion 105 is jointly formed on the inner wall surfaces of the first shell 100 and the second shell 101.

[0061] Since the second engaging portion 105 is a concave portion and the first engaging portion 161 is a convex portion, the diameter of the positioning member 16 at the first engaging portion 161 is larger than the diameter of the accommodating cavity 103. Therefore, when assembling the screw valve 1, the positioning member 16 is difficult to install into the accommodating cavity 103. By forming the second engaging portion 105 on the inner wall surface of the first housing 100 and / or the inner wall surface of the second housing 101, when assembling the screw valve 1, the positioning member 16 can be first placed between the first housing 100 and the second housing 101. When the first housing 100 and the second housing 101 are spliced together, the first engaging portion 161 and the second engaging portion 105 are engaged, and the installation of the positioning member 16 in the accommodating cavity 103 is completed at the same time, which helps to reduce the difficulty of assembling the screw valve 1.

[0062] In order to fix the screw 12 relative to the valve body 10 in the first direction X, in some embodiments, the thrust member 13 is configured as a rigid member. That is, at least the portion of the thrust member 13 in contact with the first surface 1200 needs to be made of a rigid material, and the thrust member 13 itself needs to be a rigid structure. For example, the thrust member 13 can be an annular structure made of a rigid material as a whole. Obviously, the thrust member 13 cannot be a spring or a spring piece. Although the portion of the spring or spring piece in contact with the first surface 1200 is made of a rigid material, the spring and spring piece themselves are elastic structures rather than rigid structures. The thrust member 13 also cannot be a sponge washer, as the whole of the sponge washer is made of a flexible material.

[0063] Optionally, the rigid material of the thrust member 13 can be metal, hard plastic, etc., and can be specifically selected according to the actual situation, and no specific limitation is made in this embodiment. Preferably, the rigid material of the thrust member 13 can be polyetheretherketone. Polyetheretherketone has good stiffness, and at the same time has the advantages of high temperature resistance, fatigue resistance, high strength, etc., which can improve the service life of the thrust member 13. In addition, polyetheretherketone also has good self-lubricity, so that the friction between the screw 12 and the thrust member 13 during rotation is relatively low, which is beneficial to reducing the wear and frictional heat generated by the friction between the screw 12 and the thrust member 13.

[0064] Optionally, the shape of the thrust member 13 can be a circular cylinder, or can be composed of multiple circular cylinders, and can be specifically selected according to the actual situation, and no specific limitation is made in this embodiment.

[0065] In some embodiments, the thrust member 13 includes a main body portion 130 and a protrusion portion 131. The protrusion portion 131 is provided on one side of the main body portion 130 facing the first surface 1200. The protrusion portion 131 abuts against the first surface 1200. A step surface 132 is formed between the protrusion portion 131 and the main body portion 130, and the step surface 132 faces the first surface 1200; an inner convex portion 1010 is provided on the wall surface of the receiving cavity 103, and the inner convex portion 1010 abuts against the step surface 132. In this embodiment, the shapes of the main body portion 130 and the protrusion portion 131 can both be circular cylinders, and the outer diameter of the protrusion portion 131 is smaller than the outer diameter of the main body portion 130. In this embodiment, the inner convex portion 1010 can be provided on the inner wall surface of the second housing 101.

[0066] Thus, by forming a stepped surface 132 between the main body 130 and the raised portion 131 of the thrust member 13, and providing an inner protrusion 1010 on the wall of the accommodating chamber 103, the inner protrusion 1010 abuts against the stepped surface 132, thereby blocking movement of the thrust member 13 in the second direction Y. This in turn fixes the thrust member 13 relative to the valve body 10 in the second direction Y, improving the axial stability of the thrust member 13 relative to the valve body 10, and ensuring that the thrust member 13 can effectively block movement of the screw rod 12 in the first direction X. Furthermore, when assembling the screw valve 11, when the thrust member 13 is installed in the accommodating chamber 103, the stepped surface 132 abuts against the inner protrusion 1010, which can axially position the thrust member 13, thereby facilitating installation of the thrust member 13.

[0067] In this embodiment, since the bearing 14 needs to block the movement of the screw 12 in the second direction Y, the bearing 14 is axially fixed to the valve body 10, which means that the bearing 14 is fixed relative to the valve body 10 at least in the second direction Y, that is, the bearing 14 can be fixed relative to the valve body 10 only in the second direction Y, and is not fixed relative to the valve body 10 in the first direction X, or it can be fixed relative to the valve body 10 in both the first direction X and the second direction Y.

[0068] Please also refer to Figure 2 and Figure 3 The specific manner in which the bearing 14 is fixed to the valve body 10 in the axial direction will be briefly described below.

[0069] In some embodiments, the valve body 10 further includes a third shell 102, the second shell 101 is connected between the first shell 100 and the third shell 102, the first shell 100, the second shell 101 and the third shell 102 jointly form a accommodating chamber 103, the glue inlet portion 11 is provided at one end of the first shell 100 close to the glue outlet 104, the thrust member 13 is axially fixed to the second shell 101, and the bearing 14 is axially fixed to the second shell 101; a flange portion 1022 is provided on a side of the third shell 102 facing the second shell 101, the flange portion 1022 is arranged around the axial direction, and the flange portion 1022 abuts against the side of the bearing 14 away from the shoulder portion 120, so that the bearing 14 is fixed relative to the third shell 102 in the axial direction.

[0070] In this way, the flange portion 1022 can block the movement of the bearing 14 in the second direction Y, thereby fixing the bearing 14 relative to the valve body 10 in the second direction Y, and further fixing the screw 12 relative to the valve body 10 in the second direction Y. In addition, because the second housing 101 and the third housing 102 are of a separate design, when assembling the screw valve 1, the bearing 14 is axially fixed while the second housing 101 and the third housing 102 are installed, simplifying the assembly process of the screw valve 1.

[0071] Optionally, the driving device 15 may include only the motor 150, or it may include the motor 150, the coupling 151 and the coupling key 152, the rotating shaft of the motor 150 is connected to the coupling 151, the coupling key 152 is connected between the coupling 151 and the screw 12, or it may include the motor 150 and a gear, the gear is meshed and connected to the rotating shaft of the motor 150 and the screw 12. The specific selection can be made according to actual conditions and is not specifically limited in this embodiment.

[0072] In some embodiments, the third housing 102 includes a first portion 1020 and a second portion 1021. The first portion 1020 is connected between the second portion 1021 and the second housing 101. The drive device 15 includes a motor 150, a coupling 151, and a coupling key 152. The motor 150 is disposed within the second portion 1021 and abuts against a surface of the first portion 1020 facing the second portion 1021. The rotating shaft of the motor 150 is connected to the coupling 151. The coupling 151 and the coupling key 152 are disposed within the first portion 1020. The coupling key 152 is connected between the coupling 151 and the screw 12. In this embodiment, the flange 1022 can be disposed on the first portion 1020. In this manner, the motor 150 can drive the coupling key 152 to rotate, thereby driving the screw 12 to rotate via the coupling key 152. The coupling 151 can support the rotating shaft of the motor 150 and the screw 12.

[0073] Alternatively, flange portion 1022 may be a block-shaped structure or an annular structure disposed axially around the bearing 14. The specific configuration can be selected based on practical circumstances and is not specifically limited in this embodiment. When flange portion 1022 is an annular structure, flange portion 1022 can have a larger contact area with the side of bearing 14 facing away from shoulder portion 120, thereby enhancing the stability of flange portion 1022 in securing bearing 14 axially relative to valve body 10. Furthermore, flange portion 1022 may abut only against the outer ring of bearing 14, without abutting against the inner ring of bearing 14. This generates friction between flange portion 1022 and the outer ring of bearing 14, thereby preventing the outer ring of bearing 14 from rotating while simultaneously preventing the inner ring of bearing 14 from rotating with screw 12.

[0074] In some embodiments, the wall surface of the accommodating cavity 103 is provided with an inner convex portion 1010 , and in the axial direction, the inner convex portion 1010 abuts against the bearing 14 . In this embodiment, the inner convex portion 1010 can be provided on the inner wall surface of the second housing 101 .

[0075] In this way, the inner convex portion 1010 blocks the movement of the bearing 14 in the first direction X, thereby fixing the bearing 14 relative to the valve body 10 in the first direction X, improving the stability of the bearing 14 axially relative to the valve body 10, and ensuring that the bearing 14 can effectively block the movement of the screw 12 in the second direction Y. Furthermore, when assembling the screw valve 11, when the bearing 14 is installed into the accommodating cavity 103, the bearing 14 abuts against the inner convex portion 1010, which can axially position the bearing 14 and facilitate installation of the bearing 14.

[0076] In this embodiment, in the axial direction, one side of the inner convex portion 1010 can abut against the thrust member 13, and the other side can abut against the bearing 14. In this way, the inner convex portion 1010 can fix the thrust member 13 relative to the valve body 10 in the second direction Y, and fix the bearing 14 relative to the valve body 10 in the first direction X. At the same time, when assembling the screw valve 1, the inner convex portion 1010 can axially position both the thrust member 13 and the bearing 14, facilitating their installation, achieving structural reuse of the inner convex portion 1010, and simplifying the structural design of the screw valve 1.

[0077] The following is a brief description of the assembly process of the screw valve 1:

[0078] First, the screw 12 can be passed through the second housing 101; then the thrust piece 13 and the bearing 14 can be respectively installed in the second housing 101 until the thrust piece 13 and the bearing 14 respectively abut against the two sides of the inner convex portion 1010 of the second housing 101 in the axial direction. At this time, the thrust piece 13 and the bearing 14 will also abut against the first surface 1200 and the second surface 1201 of the shaft shoulder 120 respectively; then the skeleton oil seal 170 and the flood seal 171 can be installed in the positioning piece 16; then the positioning piece 16 can be installed in the second housing 101 until the positioning piece 16 abuts against the thrust piece 13; then the first housing 101 can be installed. The body 100 is connected to the second housing 101, and the first engaging portion 161 is engaged with the second engaging portion 105; then the coupling key 152 and the coupling 151 are installed on the screw 12 in sequence; then the first part 1020 of the third housing 102 is connected to the second housing 101, and at the same time, the flange portion 1022 abuts against the side of the bearing 14 away from the shaft shoulder portion 120; then the motor 150 is arranged on the side of the first part 1020 away from the second housing 101; finally, the second part 1021 of the third housing 102 is connected to the first part 1020, and the assembly of the screw valve 1 is completed.

[0079] The assembly process of the screw valve 1 is relatively simple and has low installation difficulty, which is conducive to the actual production of the screw valve 1.

[0080] See also Figure 7, in the second aspect of the embodiments of the present utility model, a dispensing device 2 is further disclosed. The dispensing device 2 includes a screw valve 1 as in the first aspect of the embodiments of the above-mentioned utility model.

[0081] For the dispensing device 2 provided in the second aspect of the embodiments of the present utility model, since the dispensing device 2 adopts the screw valve 1 in the first aspect of the embodiments of the present utility model, the bearing 14 and the thrust member 13 of the screw valve 1 can jointly clamp the shaft shoulder 120, so that the screw 12 is axially fixed relative to the valve body 10, reducing the axial movement of the screw 12, improving the stability of the dispensing amount of the dispensing device 2, and at the same time being beneficial to improving the service life of the dispensing device 2.

[0082] Optionally, the dispensing device 2 includes but is not limited to an automatic dispensing machine, a dispensing robot, an automated assembly line, a precision dispensing system, a potting device, a 3D printing device, etc., which can be specifically selected according to the actual situation and are not specifically limited in this embodiment.

[0083] The above has introduced in detail the screw valve and the dispensing device disclosed in the embodiments of the present utility model. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the screw valve and the dispensing device of the present utility model and its core idea; at the same time, for those of ordinary skill in the art, based on the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A screw valve, characterized in that, include: A valve body, wherein the valve body is provided with a receiving cavity, and one end of the receiving cavity is provided with a glue outlet; a glue inlet portion, the glue inlet portion being connected to the accommodating cavity and being used for supplying glue into the accommodating cavity; A screw, the screw being disposed in the accommodating cavity, the screw being provided with a shoulder portion, the shoulder portion having a first surface and a second surface along the axial direction of the screw, the first surface being closer to the glue outlet than the second surface; a thrust piece, the thrust piece being sleeved on the screw and abutting against the first surface, the thrust piece being fixed to the valve body in the axial direction; a bearing, the bearing being sleeved on the screw and abutting against the second surface, the bearing being fixed to the valve body in the axial direction, the bearing and the thrust member being used to jointly clamp the shaft shoulder portion so that the screw is fixed relative to the valve body in the axial direction; and A driving device is connected to the screw, and is used to drive the screw to rotate so that the glue in the accommodating cavity is discharged from the glue outlet or sucked back.

2. The screw valve according to claim 1, characterized in that, The thrust member is fixedly connected to the valve body in the axial direction.

3. The screw valve according to claim 1, characterized in that, The thrust member is configured as a rigid member.

4. The screw valve according to claim 1, characterized in that, The screw valve further includes a positioning member fixed to the valve body in the axial direction and abutting against a side of the thrust member away from the shaft shoulder, so that the thrust member is fixed relative to the valve body in the axial direction.

5. The screw valve according to claim 4, characterized in that, The positioning piece is sleeved on the screw, and the positioning piece is provided with an installation cavity that passes through itself along the axial direction. The screw valve also includes a first sealing structure, which is provided in the installation cavity and sleeved on the screw. The first sealing structure is used to seal the installation cavity in the axial direction.

6. The screw valve according to claim 5, characterized in that, The outer periphery of the positioning member is provided with a mounting groove, and the mounting groove is arranged around the axial direction. The screw valve also includes a second sealing structure, and the second sealing structure is provided in the mounting groove, and the second sealing structure is used to seal the mounting groove in the axial direction.

7. The screw valve according to claim 4, characterized in that, The positioning member is provided with a first locking portion, and the wall surface of the accommodating cavity is provided with a second locking portion. The first locking portion is locked and connected to the second locking portion so that the positioning member is fixed relative to the valve body in the axial direction. One of the first locking portion and the second locking portion is a convex portion, and the other is a concave portion.

8. The screw valve according to claim 7, wherein, The valve body includes a first shell and a second shell connected to each other, the first shell and the second shell together enclose the accommodating cavity, the glue inlet portion is provided in the first shell, the thrust member is fixedly provided in the second shell in the axial direction, and the bearing is fixedly provided in the second shell in the axial direction; The second engaging portion is a recessed portion, and the second engaging portion is formed on the inner wall surface of the first shell and / or the inner wall surface of the second shell.

9. The screw valve according to any one of claims 1-8, characterized in that, The thrust member includes a main body and a raised portion, wherein the raised portion is provided on a side of the main body facing the first surface, the raised portion abuts against the first surface, and a stepped surface is formed between the raised portion and the main body, and the stepped surface is provided facing the first surface; An inner convex portion is provided on the wall surface of the accommodating cavity, and the inner convex portion abuts against the step surface.

10. The screw valve according to any one of claims 1-8, characterized in that, An inner convex portion is provided on the wall surface of the accommodating cavity. In the axial direction, one surface of the inner convex portion abuts against the thrust piece, and the other surface of the inner convex portion abuts against the bearing.

11. The screw valve according to any one of claims 1-7, characterized in that, The valve body includes a first shell, a second shell, and a third shell, the second shell is connected between the first shell and the third shell, the first shell, the second shell, and the third shell together form the accommodating chamber, the glue inlet is provided in the first shell, the thrust member is fixed to the second shell in the axial direction, and the bearing is fixed to the second shell in the axial direction; The third housing has a flange on one side facing the second housing. The flange is arranged around the axial direction and abuts against a side of the bearing away from the shoulder portion, so that the bearing is fixed relative to the third housing in the axial direction.

12. A dispensing device, characterized in that, The dispensing equipment includes the screw valve according to any one of claims 1 to 11.

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