Soybean milk machine

Abstract

A guide cylinder protruding towards the center of a machine head is integrally arranged on the inner side wall of the machine head, one end of the guide cylinder extends towards the center of the machine head, the other end of the guide cylinder penetrates through the side wall of the machine head, and an installation opening is formed in the outer side wall of the machine head. The mounting part extends into the guide cylinder through the mounting opening, the fastener penetrates through the guide cylinder and the mounting part to fix the mounting part on the guide cylinder, and the mounting surface is in close fit with the inner surface of the guide cylinder. The upper coupler is fixed by the fastener, and the mounting part and the guide cylinder are in close fit to realize surface-to-surface contact, so that the acting force on the mounting part is uniformly dispersed to the inner surface of the guide cylinder through the mounting surface, the guide cylinder is not easy to damage, the fixing effect of the guide cylinder on the mounting part is ensured, and the upper coupler is firmly fixed and is not easy to loosen and fall off.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of soybean milk machines, in particular to a soybean milk machine. BACKGROUND

[0002] The existing motor-over soybean milk machine, the head is provided with an upper coupler, and the cup body is provided with a lower coupler matched with the upper coupler. For the installation and fixation of the upper coupler, the prior art discloses an installation mode, that is, the convex head is provided with a structure for installing the coupler, such as the soybean milk machine disclosed in patent CN207370614U, an upper coupler mounting bracket is arranged on the transition bracket, and the inner cover is horizontally outwardly convex to form an upper coupler mounting bracket for installing the upper coupler. However, this scheme needs to set a buckle and a screw column for fixing the upper coupler on the bracket, and needs to set a sealing pad between the upper coupler and the bracket. The installation and sealing structure of the upper coupler is relatively complex, which leads to the insufficient simplification of the coupler and the installation structure. For another example, the soybean milk machine disclosed in patent CN206700060U is provided with an upper coupler mounting seat on the head cover, and the upper coupler mounting seat is formed with a containing cavity for containing the upper coupler. However, in this scheme, the containing cavity is formed by a bottom plate, a surrounding rib and a cover plate, which leads to the still complex installation structure of the upper coupler, and the upper coupler is far away from the center of the head. During the working process of the soybean milk machine, the head inserted into the cup body is prone to large amplitude vibration, and the head is prone to offset, which affects the crushing effect of the soybean milk machine and is prone to soybean milk overflow.

[0003] In addition, the prior art also discloses an installation mode of the upper coupler, such as the soybean milk machine disclosed in patent CN206777248U, which mainly integrates the upper coupler with the head cover by injection molding. Compared with the first installation mode, this scheme does not need to set an upper coupler mounting bracket, and thus does not need to set corresponding screw structures and buckle structures, which simplifies the installation mode of the upper coupler. However, in this scheme, the upper coupler and the head cover are integrally injection molded, and when the upper coupler needs to be replaced due to failure, the head cover also needs to be replaced, which leads to the increase of maintenance cost and is not conducive to the maintenance and replacement of the upper coupler. In addition, since the upper coupler is a strong electric connection part, electric sparks may occur during the working process. Therefore, the shell of the upper coupler is usually made of a flame-retardant material. The material required for the head cover does not need to have a high melting point. After the two materials with different melting points are integrally injection molded, the injection molding part is prone to breakage after a long time of use, which leads to the falling off of the coupler.

[0004] The prior art also discloses a mounting mode, for example, in the patent CN203723907U, the upper coupling is inserted into the mounting hole of the side wall of the upper cover of the head through the mounting portion, the part of the mounting portion inserted into the upper cover is provided with a positioning groove on both sides, a positioning member is arranged in the positioning groove, and the part of the positioning member protruding from the positioning groove abuts against the inner wall of the upper cover to realize the positioning of the mounting portion. However, during the plug-in cooperation of the upper coupling and the lower coupling, the force is transmitted to the positioning member and the mounting portion, the positioning member is pressed against the side wall of the upper cover, the positioning member clamps the mounting portion through the positioning groove, and the positioning member and the groove wall of the positioning groove are also pressed, so that the groove wall with a relatively small thickness is easily broken, the positioning member cannot stably mount and position the mounting portion, and then the upper coupling is loose and falls off, thereby affecting the normal use of the user. Moreover, in the scheme, the positioning member needs to be separately provided with a screw for fixing, the positioning member and the head are separately arranged, and during assembly, the positioning member needs to be fixed first, and then the head is assembled, so that the assembly steps are increased and the assembly efficiency is reduced. SUMMARY

[0005] The present application provides a kind of soybean milk machine, to solve the problem of the existing soybean milk machine upper coupling mounting structure complex, the problem of upper coupling distance head center far leading to head bias and the problem of existing soybean milk machine upper coupling fixed not firm leading to upper coupling loose and falling off.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme: a kind of soybean milk machine, including head, cup body, head cover is combined on cup body, head is provided with upper coupling, cup body is provided with lower coupling and is inserted into the cooperation of upper coupling, it is characterized in that: the inner side wall of the head is integrally formed with guide cylinder, one end of guide cylinder extends to the center of head, the other end of guide cylinder penetrates the side wall of head and forms installation port on the outer side wall of head, upper coupling includes main body and the installation portion that is protruded outward from main body, installation portion includes installation surface, installation portion is inserted into guide cylinder by installation port, fastener passes through guide cylinder and installation portion, installation portion is fixed on guide cylinder, and installation surface is tightly matched with the inner surface of guide cylinder.

[0007] Further, the installation portion is provided with a sealing sleeve on the outside, and the sealing sleeve is clamped between the installation portion and the inner wall of the guide cylinder.

[0008] Further, the installation portion is provided with a recess around, and the sealing sleeve is sleeved in the recess; or, the fastener is located outside the head and is arranged away from the center of the head relative to the sealing sleeve, the head includes a clamping portion clamped on the cup body, and the fastener passes through the clamping portion and the guide cylinder in sequence to fix the installation portion on the guide cylinder.

[0009] Further, the machine head comprises a machine head upper cover and a machine head lower cover fixedly connected with the machine head upper cover, and the guide cylinder is located on the machine head upper cover; or the machine head comprises a machine head upper cover, a machine head lower cover, and a transition support clamped between the machine head upper cover and the machine head lower cover, and the guide cylinder is located on the transition support, and an inner side wall of the transition support is provided with a protrusion extending to the center of the machine head and surrounding the transition support for one turn, the guide cylinder is located above the protrusion, and a bottom wall of the guide cylinder is integrally formed on a top of the protrusion; or the machine head comprises a machine head lower cover, and a flange horizontally extending outward is arranged on a top of the machine head lower cover, a boss surrounding the flange for one turn is arranged on the flange, and the guide cylinder is located on the boss.

[0010] Further, the machine head comprises a machine head body and a machine head lower cover, a flange horizontally extending outward is arranged on a top of the machine head lower cover, the guide cylinder is located on the machine head body, the machine head body is fixedly connected with the machine head lower cover through the flange, and a limiting portion extending downward is arranged on an edge of a lower end of a mounting opening located on an outer side of the machine head body, an outer edge of the flange abuts against an inner side of the limiting portion, and a side wall of the main body abuts against an outer side of the limiting portion.

[0011] Further, the fastener is hidden in the machine head.

[0012] Further, the machine head comprises an upper-end-opened machine head body and a cover body, the guide cylinder is integrally formed on the machine head body, the fastener fixes the upper coupler on the guide cylinder from top to bottom from a top of the guide cylinder, the cover body is combined with the machine head body to be sealed, so that the fastener is hidden in the machine head; or the machine head comprises a lower-end-opened machine head body and a machine head lower cover, a flange horizontally extending outward is arranged on a top of the machine head lower cover, the guide cylinder is integrally formed on the machine head body, the fastener fixes the upper coupler on the guide cylinder from bottom to top from a bottom of the guide cylinder, and the machine head lower cover is fixedly connected with the machine head body through the flange, so that the fastener is hidden in the machine head.

[0013] Further, the machine head is provided with a bottom-opened protective cover, and the protective cover is arranged on an outer side of the main body.

[0014] Further, a first limiting portion is arranged on a side wall of the main body away from the center of the machine head, a second limiting portion is arranged on an inner wall of the protective cover, and the first limiting portion and the second limiting portion are stopper matched or buckled connected after the protective cover is arranged on the outer side of the main body.

[0015] Further, the guide cylinder protrudes into the machine head by a length L, and 5mm≤L≤25mm.

[0016] After the above technical scheme is adopted, the following beneficial technical effects are achieved:

[0017] 1. In the present invention, a guide cylinder is integrally provided on the inner side wall of the machine head, and a mounting portion is provided on the upper coupler. The mounting portion extends into the guide cylinder through the mounting opening, and the fastener fixes the mounting portion to the guide cylinder so that the mounting surface of the mounting portion is tightly matched with the inner surface of the guide cylinder. Through this fixing method of the upper coupler, on the one hand, there is no need to provide a mounting seat for the upper coupler on the upper cover or lower cover of the machine head, so there is no need to provide a corresponding clip or screw structure for fixing the upper coupler, which simplifies the mounting structure of the upper coupler and also makes the structure of the machine head simpler. On the other hand, by forming the mounting surface of the mounting portion of the upper coupler into a shape similar to the inner surface of the guide cylinder, The guide sleeve is fixed to the mounting portion with a fastener, and the guide sleeve limits the mounting portion through the inner surface to prevent the mounting portion from rotating circumferentially. When fixed with the fastener, the mounting portion is prevented from moving axially or radially, thereby affecting the installation and positioning of the upper coupler. The mounting portion and the guide sleeve are in surface contact with each other, which increases the contact area between the two. During the process of plugging and fitting the upper and lower couplers, the upper coupler will be subjected to an axial force, and the mounting portion, as a part of the upper coupler, will also transmit the force to the mounting portion. Since the mounting portion is located on the guide sleeve, The guide tube is directed into the cylinder, and the mounting surface contacts the inner surface of the guide tube, and the acting force is dispersed to a relatively large plane, so that each part of the guide tube is evenly stressed, ensuring that the guide tube will not be damaged or broken due to excessive local stress, thereby causing the upper coupler to loosen or shift, affecting the plug-in fit of the upper and lower couplers. The guide tube is integrated with the machine head, which improves the structural strength of the guide tube. The guide tube is not easily damaged during the positioning of the mounting portion, ensuring the positioning effect of the guide tube on the mounting portion and improving the stability of the mounting portion. Finally, the upper coupler extends into the guide tube through the mounting portion, so that the upper coupler and the machine head are aligned. The distance between them is closer, which reduces the overall size of the machine head and is conducive to the miniaturization of the machine head. In addition, since the center of the machine head is closer to the coupler, when the machine head is working, the upper and lower couplers are plugged in and matched, and the other parts of the machine head are pressed on the cup body as a whole. As the machine head works, except for the plug-in point of the upper and lower couplers, the vibration of the machine head will gradually increase in the direction away from the coupler, reducing the distance between the coupler and the center of the machine head, so that the limiting effect generated by the plug-in of the upper and lower couplers can better suppress the vibration intensity of the end of the machine head away from the coupler, which is conducive to reducing the vibration of the machine head and improving the stability and noise of the soymilk maker.

[0018] 2. In the present invention, a sealing sleeve is sleeved on the mounting portion, and the sealing sleeve is clamped by the inner wall of the guide tube and the mounting portion. The sealing sleeve can seal the gap between the mounting portion and the guide tube, thereby preventing water from flowing from the guide tube into the interior of the machine head during cleaning, causing short circuit damage to electronic components.

[0019] 3. In the application, the head is clamped on the cup body through the clamping part, the fastener fixes the mounting part through the clamping part, the fastener is arranged away from the center of the head relative to the sealing sleeve, and in the process of using and cleaning the soybean milk machine, water entering from the gap between the fastener and the clamping part is blocked by the sealing sleeve and cannot enter the interior of the head, so that the electronic components in the head are prevented from being short-circuited by water.

[0020] 4. In the application, the recess is arranged on the mounting part, the sealing sleeve is sleeved in the recess, the recess wall limits the sealing sleeve after the mounting sleeve is sleeved in the recess, so that the positioning and installation of the sealing sleeve are more stable, the sealing sleeve is extruded by the inner wall of the guide cylinder when the mounting part penetrates into the guide cylinder, the sealing sleeve is prevented from being displaced and falling off due to the limiting and blocking of the recess wall, and the installation efficiency is improved.

[0021] 5. In the application, the guide cylinder is arranged on the transition support, the inner wall of the transition support is provided with a protrusion, and the bottom wall of the guide cylinder is integrally formed on the protrusion, so that the structure strength of the bottom wall of the guide cylinder is improved when the guide cylinder is extruded by the action force, the guide cylinder is prevented from being broken by extrusion during the limiting and fixing of the mounting part by the guide cylinder, and the upper coupler is prevented from being loosened and falling off.

[0022] 6. In the application, the fastener is arranged in the head, the installation gap is located in the head during the fixing of the mounting part by the fastener, no additional sealing structure is needed, and the waterproof effect of the head is improved.

[0023] 7. In the application, the limiting part extending downward is arranged at the lower end edge of the installation port, the inner side of the limiting part abuts against the outer end face of the turned edge, and the outer side of the limiting part abuts against the side wall of the main body, so that the preliminary positioning of the mounting part is completed when the side wall of the main body abuts against the limiting part during the penetration of the mounting part into the guide cylinder, then the mounting part is fixed by the fastener, the mounting part is prevented from penetrating too much or too little into the guide cylinder, the fastener cannot accurately penetrate the guide cylinder and the mounting part, the positioning and installation of the fastener on the mounting part are affected, the fastener can quickly and accurately position the mounting part, and the installation efficiency is improved.

[0024] 8. In the application, the protective cover is arranged on the head and covers the outer side of the main body, so that the main body of the upper coupler is prevented from being bumped and the service life of the upper coupler is improved.

[0025] 9. In the present invention, a first limiting portion and a second limiting portion that cooperate with each other are provided on the side wall of the main body and the inner wall of the protective cover. The first limiting portion and the second limiting portion form a stop fit or a snap connection. After the mounting portion extends into the guide cylinder, the first limiting portion and the second limiting portion cooperate to pre-position the upper coupler, thereby avoiding the upper coupler from moving when the fastener is used for positioning, resulting in the fastener being unable to accurately pass through the guide cylinder and the mounting portion to install and position the mounting portion, so that the fastener can quickly and accurately position the mounting portion, thereby improving installation efficiency.

[0026] 10. In the present invention, the length of the guide cylinder protruding into the interior of the machine head is between 5 mm and 25 mm, so that the contact area between the inner surface of the guide cylinder and the upper coupler mounting portion is larger, and the mounting portion can stably extend into the guide cylinder. During positioning, the larger contact area can better disperse the force, so that the guide cylinder will not be damaged due to excessive local force, thereby ensuring the positioning effect of the guide cylinder on the mounting portion and improving the stability of the mounting portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below with reference to the accompanying drawings:

[0028] Figure 1 This is a structural diagram of an embodiment of a soymilk maker of the present invention;

[0029] Figure 2 for Figure 1 Schematic diagram of the exploded structure of the soymilk machine head;

[0030] Figure 3 for Figure 1 A side structural cross-sectional view of the soymilk maker head;

[0031] Figure 4 for Figure 3 A magnified schematic diagram of point A in the middle;

[0032] Figure 5 for Figure 1 A cross-sectional view of the structure of the soymilk maker head from another angle;

[0033] Figure 6 for Figure 5 A magnified schematic diagram of point B in the middle; DETAILED DESCRIPTION

[0034] like Figures 1-6 As shown, the present application provides an embodiment of a soymilk maker, including a head 100 and a cup body 200. Specifically, the head 100 includes a head upper cover 101 and a head lower cover 106. A transition bracket 104 is arranged between the head upper cover 101 and the head lower cover 106. The head upper cover 101, the head lower cover 106, and the transition bracket 104 are fixedly connected by screws 109.

[0035] The soybean milk machine further comprises an upper coupler 102 mounted on the head, and specifically mounted on a transition support in the head.

[0036] The upper coupler of the soybean milk machine in the embodiment comprises a main body 1023 and a mounting portion 1021 horizontally extending outward from the top of the main body 1023, as shown in Figure 4 、 Figure 6 The main body 1023 is approximately a shell, and a plurality of vertically downward pins are arranged on the inner top wall of the main body, and a plurality of wires are connected to the pins. The bottom of the main body is open, and the mounting portion 1021 extending horizontally outward from the top of the main body forms a cantilever structure. The mounting portion is provided with a threaded hole axially penetrating the mounting portion. The mounting portion 1021 comprises a mounting surface, and specifically, the mounting surface comprises an upper mounting surface and a lower mounting surface. The upper mounting surface extends horizontally to the top of the main body and has an overall profile approximately a rectangle with a moderate length-width ratio. The lower mounting surface extends horizontally to the side wall of the main body near the center of the head and has an overall profile similar to that of the upper mounting surface. The upper and lower mounting surfaces are connected by the side surfaces on both sides. The side wall is relatively low in height. The end of the mounting portion opposite to the main body is provided with a wire outlet through which the wires connected to the pins extend out of the upper coupler.

[0037] The transition support 104 on which the upper coupler 102 is mounted has an outer profile corresponding to the shape of the outer profiles of the upper cover of the head and the lower cover of the head. In the present application, the outer profile can be circular. A guide cylinder extending toward the center of the head is integrally arranged on the inner side wall of the transition support 102. Preferably, the guide cylinder extends horizontally, as shown in Figure 4 、 Figure 6 The guide cylinder is located in the interior of the head. The guide cylinder comprises an inner surface, and specifically, the inner surface comprises a top wall 1041 and a bottom wall 1042. The top wall 1041 extends into the interior of the head near the center of the head, and the top wall 1041 extends to the side wall of the transition support away from the center of the head. The bottom wall extends into the interior of the head near the center of the head, and the bottom wall 1042 extends to the side wall of the transition support away from the center of the head. The top wall and the bottom wall have a shape approximately a rectangle with a moderate length-width ratio. The top wall 1041 and the bottom wall 1042 are connected by the side walls on both sides. The guide cylinder is provided with a through hole penetrating the bottom wall. The profiles of the top wall 1041 and the bottom wall 1042 of the guide cylinder correspond to the profiles of the upper mounting surface and the lower mounting surface of the mounting portion 1021 of the upper coupler 102. The end of the guide cylinder near the center of the head and the end of the guide cylinder away from the center of the head are open structures, and specifically, as shown in Figure 2As shown, the opening of the guide cylinder away from the center of the head is the mounting hole 1043 formed in the side wall of the transition support, and the mounting hole is surrounded by the end of the top wall, bottom wall and side wall of the guide cylinder away from the center of the head, which means that the guide cylinder penetrates through the side wall of the transition support, and the opening of the guide cylinder near the center of the head is surrounded by the end of the top wall, bottom wall and side wall of the guide cylinder near the center of the head. The wire extending from the upper coupler extends into the head interior from the opening of the guide cylinder near the center of the head.

[0038] During installation of the soybean milk machine, first, the transition support 104 is installed on the head lower cover 106. Specifically, the head lower cover 106 is a top-opened cylindrical structure, and the head lower cover 106 is provided with a horizontally outwardly extending flange at the top, and the flange is provided with a first through hole corresponding to the through hole. The transition support 104 is provided with a fitting surface at the bottom, and a sealing gasket 105 is arranged on the flange of the head lower cover 106 to prevent water vapor from entering the head during operation of the soybean milk machine, and the fitting surface at the bottom of the transition support 104 presses the sealing gasket 105 against the flange at the top of the head lower cover 106. The flange, the sealing gasket and the transition support are provided with corresponding screw through holes, and the head upper cover is provided with a screw column, and the screw is sequentially threaded through the screw through holes of the flange, the sealing gasket and the transition support and is screwed with the screw column of the head upper cover, so as to fixedly connect the head upper cover, the transition support and the head lower cover. Then, the mounting portion 1021 of the upper coupler 102 extends into the guide cylinder from the mounting hole 1043 of the side wall of the transition support, and the top wall 1041 and the bottom wall 1042 of the guide cylinder are in close contact with the upper mounting surface and the lower mounting surface of the mounting portion, respectively. Specifically, the top wall of the guide cylinder is in surface contact with the upper mounting surface of the mounting portion, and the bottom wall of the guide cylinder is in surface contact with the lower surface of the mounting portion.

[0039] The sealing gasket is provided with a second through hole corresponding to the first through hole, and the first through hole on the flange corresponds to the second through hole of the sealing gasket, the through hole of the bottom wall of the guide cylinder and the threaded hole on the mounting portion. The fastener can be a screw, and the screw is sequentially threaded through the first through hole, the second through hole, the through hole and the threaded hole from below the flange to be in threaded cooperation, so as to fix the mounting portion on the guide cylinder, that is, to fix and install the upper coupler on the head. At this time, the top wall and the bottom wall of the guide cylinder are in larger surface contact with the upper mounting surface and the lower mounting surface of the mounting portion. The wire extends out of the end of the mounting portion to the upper coupler and is connected with the electronic device in the head. Of course, the fastener can also be a bolt, which fixes the mounting portion on the guide cylinder by penetrating through the guide cylinder.

[0040] In order to facilitate accurate positioning during installation, in some embodiments, the head comprises a head body and a head lower cover, the head lower cover is provided with a horizontally outwardly extending flange at the top, the guide cylinder is located on the head body, and the head body and the head lower cover are fixedly connected through the flange, and the mounting hole is located on the outer side of the head body, such as Figure 6As shown, the lower end edge of the mounting hole, that is, the end of the bottom wall of the guide cylinder away from the center of the handpiece, is provided with a vertical downward limiting portion 1043. The side wall near the center of the handpiece abuts against the outer end face of the top flange of the lower cover of the handpiece. When the upper coupler is mounted, the upper coupler mounting portion is inserted into the guide cylinder from the mounting hole until the side wall near the center of the main body abuts against the side wall away from the center of the handpiece. At this time, the through hole on the flange corresponds to the through hole in the bottom wall of the guide cylinder and the threaded hole on the mounting portion. The main body of the handpiece can be the upper cover of the handpiece, in which case the guide cylinder is located on the upper cover of the handpiece. It can also be the assembly of the upper cover of the handpiece and the transition bracket, in which case the guide cylinder is located on the transition bracket. A limiting structure can also be provided at the end of the guide cylinder near the center of the handpiece. A protruding portion extending vertically upward can be provided at the end of the bottom wall of the guide cylinder near the center of the handpiece. The protruding portion can be located at the center of the end of the bottom wall near the center of the handpiece. The end of the upper coupler mounting portion near the center of the handpiece abuts against the protruding portion, thereby limiting the mounting portion in the guide cylinder.

[0041] The soybean milk machine of the application integrally sets a guide cylinder on the transition support, the guide cylinder penetrates through the side wall of the transition support, and a mounting port is formed on the outer side wall of the transition support, the upper coupling device top is provided with a horizontally outwardly extending mounting portion, the upper coupling device mounting portion extends into the guide cylinder from the mounting port, the upper and lower mounting surfaces of the upper coupling device are in surface contact with the top wall and the bottom wall of the guide cylinder, and the screw is sequentially screwed through the machine head lower cover flange, the bottom wall of the guide cylinder and the threaded hole on the mounting portion. Through this fixing mode of the upper coupling device, on the one hand, the mounting seat of the upper coupling device does not need to be arranged on the upper cover or the lower cover of the machine head, so that the corresponding buckle or screw structure for fixing the upper coupling device does not need to be arranged, the mounting structure of the upper coupling device is simplified, and the structure of the machine head is also simpler. On the other hand, by forming the upper and lower mounting surfaces of the mounting portion of the upper coupling device in surface contact with the top wall and the bottom wall of the guide cylinder, and then fixing the guide cylinder and the mounting portion with the screw, the guide cylinder limits the mounting portion through the top wall and the bottom wall, avoids the circumferential rotation of the mounting portion, and avoids the axial and radial movement of the mounting portion in combination with the screw fixation, thereby affecting the installation and positioning of the upper coupling device. The mounting portion and the guide cylinder are in surface-to-surface contact, which increases the contact area of the two. In the process of plug-in cooperation of the upper and lower coupling devices, the upper coupling device will be subjected to an axial force, and the force will also be transmitted to the mounting portion as part of the upper coupling device. Since the mounting portion is located in the guide cylinder and is in surface contact with the top wall and the bottom wall of the guide cylinder through the upper and lower mounting surfaces, the force is dispersed to a relatively large plane, so that the force on each part of the mounting portion is uniform, ensuring that the mounting portion will not be damaged due to excessive local force, thereby causing the upper coupling device to loosen, shift, affecting the plug-in cooperation of the upper and lower coupling devices, and improving the stability of the mounting portion. Finally, the upper coupling device extends into the guide cylinder through the mounting portion, so that the distance between the upper coupling device and the machine head is closer, the overall size of the machine head is reduced, which is conducive to the miniaturization of the machine head. In addition, since the machine head is closer to the coupling device, in the working process of the machine head, the upper and lower coupling devices are plug-in cooperated, and the other parts of the machine head are integrally pressed on the cup body. With the working of the machine head, except for the plug-in part of the upper and lower coupling devices, the vibration of the machine head will gradually increase along the direction away from the coupling device, the distance between the coupling device and the center of the machine head is reduced, the limiting effect of the plug-in of the upper and lower coupling devices better inhibits the vibration intensity of the end of the machine head away from the coupling device, which is conducive to reducing the vibration of the machine head and improving the stability and noise of the soybean milk machine.

[0042] Preferably, the top wall and the bottom wall extend from the inner side wall of the transition support to the center of the head by a distance L, 5mm≤L≤25mm. The inventor has found that when L is less than 5mm, the top wall and the bottom wall of the guide cylinder protrude too little, and after the mounting portion is mounted to the guide cylinder, the contact area between the guide cylinder and the mounting portion is small. During use of the soybean milk machine, the mounting portion is prone to loosening, which causes the upper coupler to loosen, resulting in poor contact between the upper coupler and the lower coupler, and affecting the normal operation of the soybean milk machine. When L is greater than 25mm, the guide cylinder protrudes too far into the head, and the head is provided with a motor and a signal plate. The motor and the signal plate are connected to the coupler by wires. When the guide cylinder protrudes too far into the head, it is prone to interfering with the motor and the wires, scratching the wires, and affecting the normal operation of the motor. When L is kept between 5mm and 25mm, the contact area between the guide cylinder and the mounting portion is large enough to allow the guide cylinder to stably fix the mounting portion and prevent the mounting portion from loosening and falling off. Also, the distance by which the guide cylinder protrudes from the inner side wall of the head is not too large, avoiding interference with the motor and the wires.

[0043] In this embodiment, the head lower cover of the soybean milk machine is provided with a motor, and the motor shaft extends downward out of the head lower cover. The lower end of the motor shaft is provided with a crushing knife. The inner wall of the transition support is provided with a mounting groove above the motor. The mounting groove is provided with a signal plate and an anti-overflow electrode. The lower end of the anti-overflow electrode extends out of the head through the mounting groove and the head lower cover. The bottom wall of the head lower cover is provided with a temperature sensor, which extends out of the head through the bottom wall of the head lower cover. The temperature sensor and the anti-overflow electrode are electrically connected to the signal plate by wires. The bottom of the head lower cover is also provided with a fairing that wraps the crushing knife and the temperature sensor.

[0044] After the upper coupler is mounted to the transition support, the wires connected to the pins in the upper coupler extend out of the upper coupler through the end of the mounting portion close to the center of the head, and then are connected to the motor and the signal plate. The soybean milk machine in this embodiment also includes a cup body, which includes an inner cup and an outer shell. The outer shell is provided with a handle, and the top of the handle is provided with a lower coupler corresponding to the upper coupler. The gap between the bottom of the inner cup and the bottom of the outer shell is provided with a power board. The side wall of the outer shell is provided with a socket, which is connected to the power board by a wire harness. The lower coupler includes a spring pin corresponding to the pin of the upper coupler. The spring pin is connected to the wire harness, which extends into the bottom of the outer shell and is connected to the power board through the inside of the handle. The outer shell of the cup body is provided with a display panel and a control panel. The control panel is connected to the power board by a wire harness. The control panel is provided with a plurality of keys and corresponding display lights. The display panel is provided with a pattern corresponding to the display lights. The bottom outside of the inner cup is provided with a heating tube, and the connection end of the heating tube is connected to the power board by wires.

[0045] By setting the signal board in the head and the power board on the cup, on the one hand, the signal board has a small volume and occupies a small space in the head, which is beneficial to miniaturization of the head and facilitates the consumer to hold and clean; on the other hand, the signal board and the power board are separately arranged, the signal board is used to process weak signals such as anti-overflow and temperature, and the power board needs to provide strong signals for each module of the soybean milk machine, so that the strong signals do not interfere with the weak signals, and the accuracy of signal detection is improved.

[0046] When in use, the material is first added into the inner cup, and then the head 100 is covered on the cup 200, and the upper coupling device on the head is inserted and matched with the lower coupling device on the cup. The power board supplies power to the control board through the wire harness, and the display lamp of the control board is displayed on the cup shell through the display board. The consumer presses the corresponding pattern according to the demand, thereby triggering the control board key, thereby generating a control signal, which is transmitted to the heating tube on the one hand to control the heating tube to heat, and is transmitted to the head through the lower coupling device and the upper coupling device on the other hand, thereby driving the motor to rotate, and then driving the crushing knife to rotate. The power board supplies power to the signal board in the head through the coupling device. With the operation of the soybean milk machine, the anti-overflow electrode and the temperature sensor of the head work and transmit signals to the signal board, the signal board processes the signals, and then transmits the signals to the power board through the coupling device, thereby enabling the soybean milk machine to control the working state of the motor and the heating tube according to the detection signals, so as to prevent abnormal phenomena such as overflow of the soybean milk and paste bottom of the material.

[0047] In the embodiment, the inner side wall of the transition support can also be provided with a protrusion surrounding the transition support, the protrusion extending towards the center of the head, and the guide cylinder is located above the protrusion, and the bottom wall of the guide cylinder is integrally formed on the top of the protrusion. At this time, part of the annular protrusion forms the bottom wall of the guide cylinder. In the process of positioning the mounting portion by the guide cylinder, the force acting on the bottom wall of the guide cylinder is borne by the protrusion together with the bottom wall. Since the protrusion is integrally formed on the transition support, the structural strength of the bottom wall of the guide cylinder is increased, so that the bottom wall of the guide cylinder is prevented from being crushed and broken, and the mounting portion is prevented from loosening and falling off. The protrusion can not surround the transition support, and the direction in which the guide cylinder protrudes into the head is A, and the length of the guide cylinder in the direction perpendicular to the direction A is less than the length of the protrusion in the same direction. At this time, the protrusion can generate sufficient supporting force on the bottom wall of the guide cylinder.

[0048] In this embodiment, a sealing sleeve can be sleeved outside the mounting portion, the sealing sleeve is clamped by the inner wall of the guide cylinder and the mounting portion, specifically, the top wall, the bottom wall and the side wall of the guide cylinder clamp the upper mounting surface, the lower mounting surface and the side surface of the mounting portion, the fastener is arranged away from the center of the machine head relative to the sealing sleeve, specifically to this embodiment, the sealing sleeve is arranged between the end of the mounting portion close to the center of the machine head and the screw, a groove can be arranged around the mounting portion between the end of the mounting portion close to the center of the machine head and the screw, the sealing sleeve is a ring-shaped sealing ring with a relatively narrow width, the inner diameter of the sealing sleeve should be smaller than the circumference of the groove bottom wall, so that the sealing sleeve can be firmly sleeved in the groove, the thickness of the sealing sleeve is greater than the depth of the groove, after the sealing sleeve is sleeved in the groove, the part of the sealing sleeve protruding out of the groove, when the mounting portion is inserted into the guide cylinder, the part of the sealing sleeve protruding out of the groove is extruded by the top wall, the side wall and the bottom wall of the guide cylinder, since the sealing sleeve is firmly connected with the groove, and the groove wall limits and blocks the sealing sleeve, the sealing sleeve will not fall out of the groove, when the mounting portion and the guide cylinder are fixedly connected by the screw, the part of the sealing sleeve protruding out of the groove is in interference fit with the inner wall of the guide cylinder.

[0049] By arranging a groove between the wire outlet end and the screw on the mounting portion, a sealing sleeve is sleeved in the groove, the part of the sealing sleeve protruding out of the groove is arranged, the inner diameter of the sealing sleeve is smaller than the circumference of the groove bottom wall, so that the sealing sleeve can be firmly sleeved in the groove, avoiding the sealing sleeve from falling off or being extruded and displaced; the part of the sealing sleeve protruding out of the groove is arranged, after the mounting portion and the guide cylinder are fixedly installed, the part of the sealing sleeve protruding out of the groove is in interference fit with the inner wall of the guide cylinder, to seal the gap between the mounting portion and the guide cylinder, when cleaning, avoiding water flowing through the guide cylinder into the machine head; at the same time, the sealing sleeve is located between the wire outlet end of the mounting portion and the screw, the screw passes through the flange, the sealing gasket and the guide cylinder from the outside of the flange, in the process of cleaning and using, the water entering the connection between the flange, the sealing gasket and the screw is blocked by the sealing sleeve, avoiding the water from entering the machine head through the guide cylinder, avoiding the electronic components in the machine head from being short-circuited by water.

[0050] In other embodiments, a sealing sleeve with a relatively wide width and two open ends can also be arranged, the sealing sleeve is sleeved on the mounting portion from the wire outlet end of the mounting portion, the sealing sleeve is sleeved in the region between the wire outlet end of the mounting portion and the screw, similarly, the inner diameter of the sealing sleeve should be smaller than the circumferential length of the mounting portion, so that the sealing sleeve can be firmly sleeved on the mounting portion, after the sealing sleeve is sleeved on the mounting portion, the mounting portion is inserted into the guide cylinder, the sealing sleeve is extruded by the top wall, the bottom wall and the side wall of the guide cylinder, since the sealing sleeve is firmly connected with the mounting portion, the sealing sleeve will not be displaced or fall off, after the mounting portion and the guide cylinder are fixedly connected, the sealing sleeve is in interference fit with the inner wall of the guide cylinder.

[0051] In another embodiment, the mounting surface of the mounting portion and the inner surface of the guide cylinder can also be a single surface fit, for example, the upper mounting surface of the mounting portion can be in close contact with the top wall of the guide cylinder to achieve surface contact between the upper mounting surface and the top wall; or the lower mounting surface of the mounting portion can be in close contact with the bottom wall of the guide cylinder to achieve surface contact between the lower mounting surface and the bottom wall.

[0052] For the mounting position of the mounting portion, the mounting portion can also be provided with a screw through hole, and the handpiece upper cover is provided with a screw column corresponding to the screw through hole. The screw is fixedly connected with the screw column of the handpiece upper cover by sequentially penetrating the first through hole, the second through hole, the through hole and the screw through hole from below the flange. The screw fixes the mounting portion at the same time, and fixes the handpiece upper cover and the handpiece lower cover. At this time, the screw is located outside the handpiece.

[0053] In some embodiments, the screw can also be hidden in the handpiece. The handpiece includes a handpiece body with an open upper end and a cover body. The guide cylinder is located on the handpiece body. At this time, the screw needs to be fixed from the top of the guide cylinder to fix the upper coupler on the guide cylinder, and then the cover body is sealed with the handpiece body. At this time, the screw is hidden in the handpiece cavity enclosed by the cover body and the handpiece body. The handpiece body can be a handpiece lower cover, or a combination of a handpiece lower cover and a transition support. The cover body is a handpiece upper cover.

[0054] In addition, the structure of the screw hidden in the handpiece can also be that the handpiece includes a handpiece body with an open lower end and a handpiece lower cover. The handpiece lower cover is provided with a flange extending horizontally and outwardly at the top. The guide cylinder is located on the handpiece body. At this time, the screw needs to be fixed from the bottom of the guide cylinder to fix the upper coupler on the guide cylinder, and then the handpiece body and the handpiece lower cover are fixedly connected through the flange. At this time, the screw is hidden in the handpiece cavity enclosed by the handpiece body and the handpiece lower cover. The handpiece body can be a handpiece upper cover, or a combination of a handpiece upper cover and a transition support.

[0055] Specifically, when the handpiece upper cover, the handpiece lower cover and the transition support exist, the guide cylinder is located on the transition support, and there are two installation methods: one is that the screw is fixed from below to fix the upper coupler, and then the transition support is fixed to the handpiece lower cover. It can be that the screw directly penetrates the through hole in the bottom wall of the guide cylinder and the screw through hole of the mounting portion, and is fixedly connected with the screw column of the handpiece upper cover; the mounting portion can also still be provided with a threaded hole, and the screw is threadedly connected through the through hole in the bottom wall of the guide cylinder and the threaded hole of the mounting portion; then the handpiece upper cover, the transition support and the handpiece lower cover are fixedly connected through the flange. The other is that the screw is fixed from above to fix the upper coupler, and then the handpiece upper cover and the transition support, the handpiece lower cover are fixed. The through hole is arranged on the top wall of the guide cylinder. At this time, the screw penetrates the through hole in the top wall of the guide cylinder and the threaded hole of the mounting portion, and then the handpiece upper cover, the transition support and the handpiece lower cover are fixedly connected.

[0056] In another embodiment, the transition support can be cancelled, and the guide cylinder is arranged on the head upper cover. The guide cylinder is arranged horizontally towards the center of the head. The guide cylinder is arranged on the head upper cover. The guide cylinder includes a top wall and a bottom wall. The top wall extends into the head interior near the center of the head. The top wall extends to the side wall of the head upper cover away from the center of the head. The bottom wall extends into the head interior near the center of the head. The bottom wall extends to the side wall of the head upper cover away from the center of the head. The top wall and the bottom wall are approximately rectangular in shape with a moderate length-width ratio. The top wall and the bottom wall are connected by the side walls on both sides. The bottom wall of the guide cylinder is provided with a through hole penetrating the bottom wall. The profile of the top wall and the bottom wall of the guide cylinder corresponds to the profile of the upper mounting surface and the lower mounting surface of the mounting portion of the upper coupling. The end of the guide cylinder near the center of the head and the end away from the center of the head are open structures. The opening of the end of the guide cylinder away from the center of the head is formed in the mounting port of the side wall of the head upper cover. The mounting port is surrounded by the end of the top wall, the bottom wall, and the side wall away from the center of the head. This means that the guide cylinder penetrates the side wall of the head upper cover. The opening of the end of the guide cylinder near the center of the head is surrounded by the end of the top wall, the bottom wall, and the side wall near the center of the head. The wires extending from the upper coupling extend into the head interior from the opening of the end of the guide cylinder near the center of the head. The mounting surface of the mounting portion and the inner wall of the guide cylinder are matched in the same way as in the previous embodiment. The top wall and the bottom wall of the guide cylinder can be in close contact with the upper mounting surface and the lower mounting surface of the mounting portion to form a surface contact. Alternatively, the top wall of the guide cylinder can be in close contact with the upper mounting surface of the mounting portion, or the bottom wall of the guide cylinder can be in close contact with the lower mounting surface of the mounting portion to form a surface contact.

[0057] Similarly, the inner side wall of the head upper cover can be provided with a mounting groove for arranging the anti-overflow electrode and the signal plate. At this time, the bottom of the head upper cover is provided with a fitting surface for cooperating with the flange of the head lower cover. A sealing gasket is arranged on the flange. The head upper cover presses the sealing gasket against the flange through the fitting surface. The head upper cover and the head lower cover are fixedly connected by screws. The flange and the sealing gasket are provided with corresponding screw through holes. The head upper cover is provided with screw posts corresponding to the screw through holes. The screws pass through the screw through holes of the flange and the sealing gasket in sequence and are fixedly connected with the screw posts.

[0058] For the installation of the mounting portion, the first through hole is arranged on the flange, the second through hole is arranged on the sealing gasket, and the through hole is arranged on the bottom wall of the guide cylinder. The screws pass through the first through hole, the second through hole, and the through hole in sequence from below the flange and are threadedly connected with the threaded hole of the mounting portion. Alternatively, the mounting portion is provided with a threaded through hole, and the head upper cover is provided with a screw post. The screws pass through the first through hole, the second through hole, and the through hole in sequence from below the flange and are threadedly connected with the screw post after passing through the threaded through hole of the mounting portion. At this time, the screws are located outside the head.

[0059] The screw can also be arranged in the handpiece. The screw is arranged in the bottom of the guide cylinder to fix the upper coupling, and then the upper cover of the handpiece is fixedly connected with the lower cover of the handpiece through the flanging. Specifically, the screw can be threadedly connected with the threaded hole of the mounting portion through the through hole of the bottom wall of the guide cylinder, and then the upper cover of the handpiece is fixedly connected with the lower cover of the handpiece through the flanging. Alternatively, the mounting portion is provided with a threaded hole, the upper cover of the handpiece is provided with a screw column, the screw is threadedly connected with the screw column of the upper cover of the handpiece through the through hole and the threaded hole in sequence, and then the upper cover of the handpiece is fixedly connected with the lower cover of the handpiece through the flanging.

[0060] In another embodiment, a boss is arranged on the flange at the top of the lower cover of the handpiece, and the guide cylinder is arranged on the boss. The structure of the guide cylinder is as described above. Specifically, the inner side wall of the boss extends inward to form the guide cylinder, the guide cylinder includes a top wall and a bottom wall, the top wall extends into the inside of the handpiece near the center of the handpiece, the top wall extends to the side wall of the boss away from the center of the handpiece, the bottom wall extends into the inside of the handpiece near the center of the handpiece, and the bottom wall extends to the side wall of the boss away from the center of the handpiece. The top wall and the bottom wall are approximately rectangular in shape with a moderate length-width ratio, and the top wall and the bottom wall are connected by the side walls on both sides. The bottom wall of the guide cylinder is provided with a through hole penetrating the bottom wall. The profiles of the top wall and the bottom wall of the guide cylinder correspond to the profiles of the upper mounting surface and the lower mounting surface of the mounting portion of the upper coupling. The end of the guide cylinder near the center of the handpiece and the end of the guide cylinder away from the center of the handpiece are open structures. The opening of the end of the guide cylinder away from the center of the handpiece is an installation opening formed in the outer side wall of the boss. The installation opening is surrounded by the end of the top wall, the bottom wall and the side wall of the guide cylinder away from the center of the handpiece, which means that the guide cylinder penetrates the side wall of the boss. The opening of the end of the guide cylinder near the center of the handpiece is surrounded by the end of the top wall, the bottom wall and the side wall of the guide cylinder near the center of the handpiece. The wire extending from the upper coupling extends into the inside of the handpiece from the opening of the end of the guide cylinder near the center of the handpiece. The mounting surface of the mounting portion and the inner wall of the guide cylinder can be in the same cooperation mode as in the previous embodiments, that is, the top wall and the bottom wall of the guide cylinder are in close contact with the upper mounting surface and the lower mounting surface of the mounting portion to form a surface contact, or the top wall of the guide cylinder is in close contact with the upper mounting surface of the mounting portion or the bottom wall of the guide cylinder is in close contact with the lower mounting surface of the mounting portion to form a surface contact.

[0061] In this embodiment, the lower cover of the handpiece can be a single-layer metal lower cover, the boss is arranged on the flange at the top of the metal lower cover, and the boss can be integrally formed on the flange. The boss and the flange are provided with a plurality of screw through holes, the upper cover of the handpiece is provided with corresponding screw columns, and the screw is fixedly connected with the screw columns through the screw through holes of the flange and the boss. For the installation of the mounting portion, the mounting portion can be provided with a threaded hole, the bottom wall of the guide cylinder and the flange are correspondingly provided with threaded holes, the screw is threadedly connected with the threaded hole after penetrating the flange and the bottom wall of the guide cylinder. Alternatively, the mounting portion can be provided with a threaded hole, the upper cover of the handpiece is correspondingly provided with a screw column, and the screw is threadedly connected with the screw column after penetrating the flange, the bottom wall of the guide cylinder and the mounting portion. At this time, the screw is located outside the handpiece.

[0062] Similarly, the guide cylinder is provided with a threaded hole, a screw can be arranged in the handpiece, the top wall of the guide cylinder is provided with a screw through hole, the screw is first threaded through the top wall of the guide cylinder and the threaded hole, and then the upper cover of the handpiece is fixedly connected with the lower cover of the handpiece.

[0063] The lower cover of the handpiece can also be a double-layer lower cover, that is, a plastic lower cover accommodating the motor is arranged on the inner layer, and a metal lower cover is arranged on the outer layer. The plastic lower cover and the metal lower cover are both provided with a turned-up edge on the top thereof. A boss is arranged on the plastic turned-up edge on the top of the plastic lower cover, and the plastic turned-up edge is lapped on the metal turned-up edge. The boss can be integrally formed on the plastic turned-up edge. The boss, the plastic turned-up edge and the metal turned-up edge are provided with a plurality of screw through holes. The upper cover of the handpiece is provided with corresponding screw posts. After the screw is threaded through the screw through holes of the metal turned-up edge, the plastic turned-up edge and the boss, the screw is fixedly connected with the screw posts. As to the installation of the installation part, the installation part can be provided with a threaded hole, and the bottom wall of the guide cylinder and the plastic turned-up edge and the metal turned-up edge are correspondingly provided with threaded through holes. After the screw is threaded through the metal turned-up edge, the plastic turned-up edge and the bottom wall of the guide cylinder, the screw is screwed with the threaded hole. The installation part can also be provided with a threaded through hole, and the upper cover of the handpiece is correspondingly provided with a screw post. After the screw is threaded through the metal turned-up edge, the plastic turned-up edge, the bottom wall of the guide cylinder and the installation part, the screw is screwed with the screw post. At this time, the screw is located outside the handpiece.

[0064] Similarly, the installation part is provided with a threaded hole, a screw can be arranged in the handpiece, the top wall of the guide cylinder is provided with a screw through hole, the screw is first threaded through the top wall of the guide cylinder and the threaded hole, and then the upper cover of the handpiece is fixedly connected with the lower cover of the handpiece.

[0065] In another embodiment, a bottom-open protective cover can be arranged on the outer side of the handpiece. The protective cover is arranged on the outer side of the upper coupler main body. The side wall of the main body away from the center of the handpiece is provided with a first limiting part. The inner side wall of the protective cover is provided with a second limiting part. The first limiting part and the second limiting part are stopper matched or buckled connected. The first limiting part can be an outwardly protruding rib. The second limiting part can be a surrounding edge extending inwardly at the bottom of the protective cover. The rib is abutted on the surrounding edge. The second limiting part can also be a clamping groove. The rib can be clamped in the clamping groove. The second limiting part can also be a protruding part extending inwardly. The rib is abutted on the protruding part. Figure 6 As shown in FIG. 10B, the first limiting part can also be a clamping groove 1025, and the second limiting part is an inwardly extending rib 1012. The rib can be clamped in the clamping groove.

[0066] By setting the cover on the outer side of the main body, the upper coupler main body can be prevented from being knocked and damaged, and the service life of the coupler is improved; the first limiting part and the second limiting part are arranged on the side wall of the main body and the inner wall of the protective cover and cooperate with each other, the first limiting part and the second limiting part form a stop cooperation or a buckle connection, after the mounting part is inserted into the guide cylinder, the cooperation of the first limiting part and the second limiting part can pre-position the upper coupler, and the use of fasteners for positioning can prevent the upper coupler from moving, so that the fasteners cannot accurately pass through the guide cylinder and the mounting part to install and position the mounting part, so that the fasteners can quickly and accurately position the mounting part, and the installation efficiency is improved.

[0067] Those skilled in the art should understand that the present application includes but is not limited to the contents described in the drawings and the above detailed description. Any modification without deviating from the functional and structural principles of the present application will be included in the scope of the claims.

Claims

1. A soymilk machine comprising a head, a cup, the head being combined with the cup, an upper coupling device being arranged on the head, and a lower coupling device being arranged on the cup and being insertedly matched with the upper coupling device, characterized in that: The inner side wall of the machine head is integrally formed with a guide cylinder, one end of the guide cylinder extends to the center of the machine head, the other end of the guide cylinder penetrates the side wall of the machine head and forms a mounting port on the outer side wall of the machine head, the upper coupler includes a main body and a mounting portion protruding outward from the main body, the mounting portion includes a mounting surface, the mounting portion extends into the guide cylinder through the mounting port, the fastener penetrates the guide cylinder and the mounting portion, fixes the mounting portion on the guide cylinder, and makes the mounting surface tightly fit with the inner surface of the guide cylinder.

2. The soybean milk machine according to claim 1, characterized in that: The outer side of the mounting portion is sleeved with a sealing sleeve, and the sealing sleeve is clamped between the mounting portion and the inner wall of the guide cylinder.

3. The soybean milk machine according to claim 2, characterized in that: The mounting portion is provided with a groove around it, and the sealing sleeve is sleeved in the groove. Alternatively, the fastener is located outside the machine head and is arranged away from the center of the machine head relative to the sealing sleeve, the machine head includes a clamping portion clamped on the cup body, and the fastener penetrates the clamping portion and the guide cylinder in sequence to fix the mounting portion on the guide cylinder.

4. The soybean milk machine according to claim 1, characterized in that: The machine head includes a machine head upper cover and a machine head lower cover fixedly connected with the machine head upper cover, and the guide cylinder is located on the machine head upper cover. Alternatively, the machine head includes a machine head upper cover, a machine head lower cover, and a transition support clamped between the machine head upper cover and the machine head lower cover, the guide cylinder is located on the transition support, and the inner side wall of the transition support is provided with a protrusion extending to the center of the machine head and surrounding the transition support once, the guide cylinder is located above the protrusion, and the bottom wall of the guide cylinder is integrally formed on the top of the protrusion. Alternatively, the machine head includes a machine head lower cover, a horizontally outwardly extending flange is arranged on the top of the machine head lower cover, and a boss surrounding the flange once is arranged on the flange, and the guide cylinder is located on the boss.

5. The soybean milk machine according to claim 1, characterized in that: The machine head includes a machine head body and a machine head lower cover, a horizontally outwardly extending flange is arranged on the top of the machine head lower cover, the guide cylinder is located on the machine head body, the machine head body is fixedly connected with the machine head lower cover through the flange, a downwardly extending limiting portion is arranged on the lower end edge of the mounting port on the outer side of the machine head body, the outer edge of the flange abuts against the inner side of the limiting portion, and the side wall of the main body abuts against the outer side of the limiting portion.

6. The soybean milk machine according to claim 1, characterized in that: The fastener is hidden in the machine head.

7. The soybean milk machine according to claim 6, characterized in that: The machine head includes an open-top machine head body and a cover, the guide cylinder is integrally formed on the machine head body, the upper coupler is fixed on the guide cylinder from top to bottom by the fastener after the guide cylinder top, and the cover is sealed with the machine head body to hide the fastener in the machine head. Alternatively, the machine head includes an open-bottom machine head body and a machine head lower cover, a horizontally outwardly extending flange is arranged on the top of the machine head lower cover, the guide cylinder is integrally formed on the machine head body, the upper coupler is fixed on the guide cylinder from bottom to top by the fastener after the guide cylinder bottom, and the machine head lower cover is fixedly connected with the machine head body through the flange to hide the fastener in the machine head.

8. The soybean milk machine according to claim 1, characterized in that: The machine head is provided with a bottom-open protective cover, and the protective cover is arranged on the outer side of the main body.

9. The soybean milk machine according to claim 8, characterized in that: The side wall of the main body away from the center of the machine head is provided with a first limiting portion, the inner wall of the protective cover is provided with a second limiting portion, and the first limiting portion and the second limiting portion are stop-fitted or buckled after the protective cover is arranged on the outer side of the main body.

10. The soybean milk machine according to claim 1, characterized in that: The length of the guide cylinder protruding into the machine head is L, and 5mm≤L≤25mm.

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