Cutter assembly capable of moving up and down and stirring cup

Abstract

The utility model discloses a knife assembly capable of moving up and down and a stirring cup, which comprise a knife holder, an installation cavity and an installation port are arranged in the knife holder, and the installation port is communicated with the installation cavity; the cutter shaft mechanism comprises a cutter shaft, a cutter shaft seat and a sealing telescopic sleeve, the cutter shaft is rotatably mounted on the cutter shaft seat and can move up and down along the cutter shaft seat, one end of the sealing telescopic sleeve is connected to the outer surface of the cutter shaft, and the other end of the sealing telescopic sleeve is connected to the outside of the cutter shaft seat; the cutter shaft seat is mounted in the mounting cavity through the mounting opening, so that the sealing telescopic sleeve is sealed in the mounting opening; one end of the cutter shaft extends out of the sealing telescopic sleeve and is connected with a blade, and a connector is arranged at the other end of the cutter shaft and used for driving the cutter shaft to move up and down when stressed. The stirring cup comprises the knife assembly. The cutter shaft can move up and down relative to the cutter shaft seat to adjust the height position of the blade in the stirring cup.

Description

Technical Field

[0001] The utility model relates to the technical field of stirring structures, in particular to a knife assembly capable of moving up and down and a stirring cup. Background Art

[0002] At present, when blending materials, juicers, baby food machines, wall breakers, etc., generally use a motor to drive the blade assembly in the blending cup to rotate, and the rotating motion of the blade assembly realizes the blending action to process the materials.

[0003] Existing blade assemblies are typically installed inside the blender cup. After the blender cup is assembled to the corresponding machine base, the blade assembly's blade shaft is connected to the drive mechanism on the machine base. However, since the blade assembly cannot move up and down after assembly, its position within the blender cup cannot be adjusted. If blending is desired at a higher position in the blender cup, or to accommodate different material mixing conditions, the typical approach is to lengthen the blade shaft and replace a different blade assembly. Utility Model Content

[0004] In order to overcome at least one of the defects described in the above-mentioned prior art, the present invention provides a knife assembly and a blending cup that can move up and down, wherein the knife shaft can be installed on the knife seat through the knife shaft seat, and the knife shaft can move up and down relative to the knife shaft seat to adjust the height position of the blade in the blending cup.

[0005] The technical solution adopted by the present invention to solve the problem is:

[0006] A knife assembly capable of moving up and down, comprising:

[0007] A knife seat, wherein a mounting cavity and a mounting opening are provided in the knife seat, and the mounting opening is communicated with the mounting cavity;

[0008] The knife shaft mechanism includes a knife shaft, a knife shaft seat and a sealing telescopic sleeve. The knife shaft is rotatably mounted on the knife shaft seat and can move up and down along the knife shaft seat; the sealing telescopic sleeve is mounted on the outside of the knife shaft, one end of the sealing telescopic sleeve is connected to the outer surface of the knife shaft, and the other end of the sealing telescopic sleeve is connected to the outside of the knife shaft seat; the knife shaft seat is installed in the mounting cavity through the mounting port so that the sealing telescopic sleeve is sealed in the mounting port; one end of the knife shaft extends out of the sealing telescopic sleeve and is provided with a blade, and the other end of the knife shaft is formed as a transmission end, and the transmission end is provided with a connector, and the connector is used to drive the knife shaft to move up and down when subjected to force.

[0009] Furthermore, a connecting sleeve is provided around the inner wall of the mounting port, a first threaded section is provided on the inner wall of the connecting sleeve, a second threaded section is provided on the outer surface of the tool shaft seat, and the second threaded section is threadably matched with the first threaded section so that the tool shaft seat is threadedly connected to the mounting port.

[0010] Further, a plurality of limiting tooth grooves are provided on the circumferential direction of the bottom end of the connecting sleeve; a limiting frame is arranged around the bottom end of the cutter shaft seat, and an elastic limiting part is arranged on the limiting frame. The elastic limiting part is used for being clamped into one of the limiting tooth grooves and withdrawing from the limiting tooth groove when the cutter shaft seat rotates to be clamped into another adjacent limiting tooth groove.

[0011] Further, an avoidance opening is arranged on the limiting frame, the elastic limiting part is an elastic buckle, one end of the elastic buckle is connected to the side wall of the avoidance opening, and the elastic buckle extends out of the avoidance opening under the action of its own elastic stress and is clamped into the limiting tooth groove.

[0012] Further, the bottom end of the sealing telescopic sleeve is sleeved on the outer peripheral edge of the top end of the cutter shaft seat; an upward extending sealing edge is arranged on the outer peripheral edge of the bottom end of the sealing telescopic sleeve; a sealing groove is arranged on the top wall of the installation opening, and the sealing edge is used for sealing the sealing telescopic sleeve into the sealing groove when it extends into the installation opening.

[0013] Further, the cutter shaft mechanism includes a first bearing, a second bearing and a shaft sleeve. The cutter shaft is connected to the inside of the shaft sleeve through the first bearing; the shaft sleeve is connected to the inside of the cutter shaft seat through the second bearing; a first elastic member is arranged inside the cutter shaft seat; the first elastic member is used for providing a first elastic stress to drive the shaft sleeve to move downward.

[0014] Further, the transmission end extends out through the bottom end of the shaft sleeve and is connected to the connecting head; the connecting head is movably connected to the transmission end and can move up and down along the axial direction of the cutter shaft; a second elastic member is arranged inside the shaft sleeve, and the second elastic member is used for providing a second elastic stress to drive the connecting head to move downward.

[0015] Further, a through cavity is arranged inside the connecting head; the transmission end is movably inserted into the through cavity; a limiting step is arranged on the part of the transmission end located in the through cavity; the limiting step is used for abutting against the top wall of the through cavity to prevent the connecting head from separating from the transmission end.

[0016] Further, the sealing telescopic sleeve includes a plurality of folding segments arranged in the axial direction of the cutter shaft, and adjacent two folding segments are connected by an inclined surface or an arc surface; the sealing telescopic sleeve is made of a sealant structure.

[0017] A mixing cup includes the cutter assembly as described above.

[0018] In summary, the utility model has the following technical effects:

[0019] Since one end of the sealed telescopic sleeve is connected to the cutter shaft, and the other end of the sealed telescopic sleeve is clamped at the installation position between the installation port and the cutter shaft seat after the cutter shaft seat is assembled to the installation port, when the cutter shaft moves upward, it can drive the sealed telescopic sleeve to stretch upward. The transmission end of the cutter shaft for connecting to the driving structure and the connecting structure inside the cutter shaft seat can be sealed inside by the sealed telescopic sleeve. Even when the cutter shaft moves upward, one end of the sealed telescopic sleeve can maintain a seal between the cutter seat and the cutter shaft seat. When the cutter shaft is reset, the cutter shaft moves downward, and the sealed telescopic sleeve connected to the cutter shaft can be compressed when the cutter shaft is reset. After the sealed telescopic sleeve is compressed, a thicker sealing layer can be formed to seal at the installation port position, and the sealing effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. is a schematic diagram of a state of a sectional view of the cutter assembly of the present utility model;

[0021] Figure 2 FIG. is another schematic diagram of a state of a sectional view of the cutter assembly of the present utility model;

[0022] Figure 3 FIG. is a schematic structural diagram of the cutter assembly of the present utility model;

[0023] Figure 4 FIG. is a schematic structural diagram of the cutter seat of the present utility model;

[0024] Figure 5 FIG. is a schematic structural diagram of the cutter shaft seat of the present utility model;

[0025] Figure 6 FIG. is a schematic structural diagram of the mixing cup of the present utility model.

[0026] Wherein, the meanings of the reference numerals are as follows: 10, cutter seat; 11, installation port; 12, connecting sleeve; 121, first thread section; 122, limiting tooth groove; 20, cutter shaft seat; 21, limiting frame; 211, limiting port; 212, elastic buckle; 22, second thread section; 30, cutter shaft; 31, blade; 32, shaft sleeve; 33, first bearing; 34, second bearing; 35, limiting step; 40, sealed telescopic sleeve; 50, connecting head; 51, through connection cavity; 60, first elastic member; 70, second elastic member; 80, mixing cup; 90, sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] For better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0030] See Figures 1 - 5 The utility model discloses a knife assembly that can move up and down, including a knife seat 10 and a knife shaft 30 mechanism. The knife seat 10 is provided with a mounting cavity and a mounting opening 11, and the mounting opening 11 is connected with the mounting cavity, and the knife shaft 30 mechanism is installed in the mounting cavity through the mounting opening 11.

[0031] Specifically, the blade shaft 30 mechanism includes the blade shaft 30, the blade shaft seat 20, and a sealing telescopic sleeve 40. The blade shaft 30 is rotatably mounted on the blade shaft seat 20, and the blade shaft 30 can move up and down along the blade shaft seat 20. The sealing telescopic sleeve 40 is sleeved on the outside of the blade shaft 30. One end of the sealing telescopic sleeve 40 is connected to the outer surface of the blade shaft 30. The end of the sealing telescopic sleeve 40 connected to the outer surface of the blade shaft 30 is sealed to the outside of the blade shaft 30, and the other end of the sealing telescopic sleeve 40 is connected to the outside of the blade shaft seat 20. The sealing telescopic sleeve 40 can be connected to the outer peripheral edge of the top end of the blade shaft seat 20.

[0032] When the blade shaft 30 is mechanically installed in the mounting cavity, the blade shaft seat 20 is installed in the mounting cavity through the mounting opening 11. After the blade shaft seat 20 is installed in the mounting cavity, the sealing telescopic sleeve 40 on the blade shaft seat 20 is sealed against the mounting opening 11. In addition, one end of the blade shaft 30 extends from the sealing telescopic sleeve 40 and is provided with a blade 31. The other end of the blade shaft 30 forms a transmission end, which is provided with a connector 50. The connector 50 is used to drive the blade shaft 30 to move up and down when subjected to force.

[0033] On the basis of the above structure, when using the knife assembly that can move up and down of the utility model, the knife assembly can be applied to the mixing cup 80 of equipment such as juicers, wall breakers, and baby food machines. When the mixing cup 80 is installed on the machine body, the connecting head 50 extending from the bottom end of the mixing cup 80 is connected to the driving structure of the machine base. The driving structure drives the connecting head 50 to rotate, which can drive the knife shaft 30 to rotate, and then drive the blade 31 to rotate, so that the blade 31 rotates in the mixing cup 80 to realize the stirring action.

[0034] When the stirring height requiring the blade 31 is relatively high, an external force can be applied to the connecting head 50. After the connecting head 50 is stressed, it can drive the tool shaft 30 to move upward relative to the tool shaft seat 20, so that the tool shaft 30 can move upward, driving the blade 31 connected to this end to move upward. The blade 31 can move to a relatively high height inside the mixing cup 80, which is suitable for the mixing requirements of different materials. And the connecting head 50 connected to the driving end of the tool shaft 30 is connected to the driving structure.

[0035] When the tool shaft 30 is reset, it can also be reset by applying force to the tool shaft 30, or it can be reset by an elastic component to drive the tool shaft 30.

[0036] It should be noted that since one end of the sealing telescopic sleeve 40 is connected to the tool shaft 30, and the other end of the sealing telescopic sleeve 40 is clamped at the installation position of the installation port 11 and the tool shaft seat 20 after the tool shaft seat 20 is assembled into the installation port 11. In this way, when the tool shaft 30 moves upward, it can drive the sealing telescopic sleeve 40 to stretch upward. The driving end of the tool shaft 30 for connecting to the driving structure and the connecting structure inside the tool shaft seat 20 can be sealed inside by the sealing telescopic sleeve 40. Even when the tool shaft 30 moves upward, one end of the sealing telescopic sleeve 40 can maintain a seal between the tool seat 10 and the tool shaft seat 20.

[0037] Similarly, when the tool shaft 30 is reset, the tool shaft 30 moves downward, and the sealing telescopic sleeve 40 connected to the tool shaft 30 can be compressed when the tool shaft 30 is reset. After the sealing telescopic sleeve 40 is compressed, a relatively thick sealing layer can be formed to seal at the installation port 11 position, and the sealing effect is better.

[0038] Furthermore, in order to enable the tool shaft seat 20 to stably connect to the tool seat 10, a connecting sleeve 12 can also be provided around the inner wall of the installation port 11. In this way, when the tool shaft seat 20 is assembled, the tool shaft seat 20 extends into the connecting sleeve 12 through the installation port 11, and the circumferential wall of the connecting sleeve 12 is assembled with the circumferential wall of the tool shaft seat 20, so as to improve the assembly surface and form a more stable assembly structure.

[0039] Specifically, a first thread section 121 is provided on the inner wall of the connecting sleeve 12, and a second thread section 22 is provided on the outer surface of the tool shaft seat 20 correspondingly, and the second thread section 22 is thread-matched with the first thread section 121. When the tool shaft seat 20 and the tool seat 10 are assembled, the connection between the tool shaft seat 20 and the connecting sleeve 12 is realized by the threaded rotation of the first thread section 121 and the second thread section 22. Since the sealing telescopic sleeve 40 can have a certain telescopic performance, during the process of screwing the tool shaft seat 20 into the connecting sleeve 12, the part of the sealing telescopic sleeve 40 connected to the end of the tool shaft seat 20 can be extruded and deformed during the rotation installation process, and the formed extrusion sealing structure can better fill the assembly gap and improve the sealing effect.

[0040] Further, in the prior art, the tool holder 10 and the tool shaft seat 20 are generally locked by structures such as screws and bolts. In this embodiment, the tool shaft seat 20 is directly threadedly assembled into the connecting sleeve 12 of the tool holder 10. When the tool shaft 30 rotates to drive the blade 31 to rotate, the tool shaft seat 20 is also prone to inertial rotation, resulting in loosening of the threaded assembly between the tool shaft seat 20 and the tool holder 10.

[0041] Therefore, a plurality of limiting tooth grooves 122 are provided on the circumferential direction of the bottom end of the connecting sleeve 12, and a limiting frame 21 is arranged around the bottom end of the tool shaft seat 20. An elastic limiting portion is provided on the limiting frame 21. The elastic limiting portion can be clamped into one of the limiting tooth grooves 122 and exit the limiting tooth groove 122 when the tool shaft seat 20 rotates to be clamped into another adjacent limiting tooth groove 122. On the basis of this structure, when the tool shaft seat 20 and the connecting sleeve 12 are rotationally assembled, the first threaded section 121 and the second threaded section 22 are rotationally matched. At this time, the assembly force applied to the tool shaft seat 20 can overcome the elastic stress of the elastic limiting portion. Therefore, the elastic limiting portion can rotate from one of the limiting tooth grooves 122 to another limiting tooth groove 122 when the tool shaft seat 20 rotates, without affecting the normal assembly of the tool shaft seat 20 and the tool holder 10.

[0042] After the tool shaft seat 20 and the tool holder 10 are assembled in place, the elastic limiting portion can be kept clamped in the corresponding limiting tooth groove 122 under the action of its own elastic stress, preventing the tool shaft seat 20 from being displaced due to the rotation of the tool shaft 30 (the acting force is not sufficient to overcome the elastic force of the elastic limiting portion), so that the assembly structure of the tool shaft seat 20 and the tool holder 10 can maintain a stable state during the use of the tool shaft 30.

[0043] Further, an avoidance opening is provided on the limiting frame 21. The above-mentioned elastic limiting portion is an elastic buckle 212, and one end of the elastic buckle 212 is connected to the side wall of the avoidance opening. The elastic buckle 212 extends out of the avoidance opening and is clamped into the limiting tooth groove 122 under the action of its own elastic stress. In this way, when the tool shaft seat 20 and the tool holder 10 are rotationally assembled, the elastic buckle 212 can be compressed and received in the avoidance opening under the action of the assembly force of the tool shaft seat 20, reducing the assembly damping caused by the protrusion of the elastic buckle 212 and making the clamping process smoother. After the assembly is in place, the elastic buckle 212 can extend out of the avoidance opening under the action of its own elastic stress and remain clamped in the limiting tooth groove 122.

[0044] Of course, the above-mentioned elastic limiting portion can also be selected as a spring pin structure in the prior art. The spring pin can extend out and be clamped into the limiting tooth groove 122 under the action of its own elastic stress after the assembly is in place, and can also slide in different limiting tooth grooves 122 when the tool shaft seat 20 is subjected to an assembly force.

[0045] Further, in order to improve the sealing performance of the sealing telescopic sleeve 40 after the cutter shaft seat 20 and the cutter seat 10 are assembled, the bottom end of the sealing telescopic sleeve 40 is sleeved on the outer peripheral edge of the top end of the cutter shaft seat 20. Correspondingly, a sealing edge extending upward is provided on the outer peripheral edge of the bottom end of the sealing telescopic sleeve 40. A sealing groove is provided on the top wall of the mounting opening 11. When the sealing telescopic sleeve 40 is sealed in the mounting opening 11, the sealing edge can correspond to the sealing groove. In this way, when the cutter shaft seat 20 is rotationally assembled, the sealing edge of the part of the sealing telescopic sleeve 40 connected to the cutter shaft seat 20 extends into the sealing groove. During the extrusion process, it is sealed to the sealing groove, and a labyrinth sealing structure can be formed at this position, so that the sealing effect is better.

[0046] Further, the above-mentioned cutter shaft 30 mechanism includes a first bearing 33, a second bearing 34 and a bushing 32. The cutter shaft 30 is connected to the inside of the bushing 32 through the first bearing 33, and the bushing 32 is connected to the inside of the cutter shaft seat 20 through the second bearing 34. Specifically, an assembly cavity can be provided inside the cutter shaft seat 20. The above-mentioned cutter shaft 30 is connected to the inside of the bushing 32 through the first bearing 33, and the bushing 32 can be connected to the inner wall of the assembly cavity of the cutter shaft seat through the second bearing 34. In this way, when the cutter shaft 30 rotates, it can be rotationally matched with the bearing through the first bearing 33, and the rotation process is stable. Moreover, the bushing 32 is connected to the inner wall of the assembly cavity through the second bearing 34, and the bushing 32 can move up and down relative to the cutter shaft seat 20 under the guidance of the second bearing 34. In this way, when the cutter shaft 30 needs to move upward, the cutter shaft 30 moves upward under the top pressure, driving the bushing 32 connected to the outside of the cutter shaft 30 through the first bearing 33 to move upward at the same time. Under the action of the second bearing 34, the overall upward movement of the cutter shaft 30 is more stable. At the same time, the cutter shaft 30 is rotatably installed in the bushing 32 through the first bearing 33, so it can rotate smoothly.

[0047] It should be noted that the above-mentioned first bearing 33 can be selected as a ball bearing in the prior art, and the second bearing 34 can be selected as a sliding bearing in the prior art, and the specific selection is made according to actual needs.

[0048] Specifically, a first elastic member 60 is provided within the tool shaft seat 20. The first elastic member 60 can provide a first elastic stress that drives the bushing 32 to move downward. That is, under the action of the first elastic stress provided by the first elastic member 60, the bushing 32 can maintain an upward state. In the initial state, the tool shaft 30 is maintained at a first position (a lower position within the mixing cup 80) under the action of the first elastic member 60. At this time, the blade 31 structure connected to the tool shaft 30 is at the first position. When the blade 31 needs to be adjusted upward to a second position (a higher position within the mixing cup 80), by externally pressing the connector 50, the connector 50 drives the tool shaft 30 to move upward after being stressed, and the bushing 32 and the tool shaft 30 move upward simultaneously. At this time, the first elastic member 60 is compressed. After the connector 50 is stressed to drive the tool shaft 30 upward, it is connected to the drive structure, so that the blade 31 on the tool shaft 30 can rotate at the second position.

[0049] After the mixing is completed, the connector 50 of the tool shaft 30 is separated from the drive structure, and the first elastic member 60 can reset to drive the tool shaft 30 to move downward. At this time, the blade 31 connected to the tool shaft 30 can return to the first position.

[0050] It should be noted that the above-mentioned first elastic member 60 can be arranged in the assembly cavity of the tool shaft seat 20, and a compression step can be provided at the bottom end of the bushing 32. The first elastic member 60 can be sleeved outside the bottom end of the bushing 32 and abutted against the compression step.

[0051] More specifically, since the tool shaft 30 has an upward and downward movement tendency relative to the tool shaft seat 20, when the blade 31 rotates normally at a low position, the tool shaft 30 is prone to be affected by other acting forces, such as the stirring resistance within the mixing cup 80, acting on the tool shaft 30, making the tool shaft 30 prone to abnormal upward movement. At this time, after the tool shaft 30 moves upward, it is easy for the transmission end at the other end of the tool shaft 30 to also move upward. At this time, the connector 50 at the transmission end is prone to be separated from the drive structure, resulting in the stop of the stirring action.

[0052] Therefore, in this embodiment, the above-mentioned transmission end extends out through the bottom end of the bushing 32 and is connected to the connector 50. The connector 50 is movably connected to the transmission end and can move up and down along the axial direction of the tool shaft 30. A second elastic member 70 is provided within the bushing 32. The second elastic member 70 is used to provide a second elastic stress that drives the connector 50 to move downward. In this way, even if one end of the tool shaft 30 connected with the blade 31 is stressed and moves upward, since the transmission end of the tool shaft 30 is movably connected to the connector 50, the transmission end can also move relative to the connector 50 without driving the connector 50 to move upward together. At the same time, under the action of the second elastic member 70, the connector 50 can always maintain a downward state under the action of the second elastic stress, so that it can be stably connected to the drive structure, making the transmission structure stable.

[0053] When the blade shaft 30 needs to be manually adjusted upward to a higher position where the blade 31 extends into the blending cup 80, the connector 50 is driven upward by external force. The connector 50 can first move relative to the transmission end of the blade shaft 30. When it moves to abut against the blade shaft 30, it drives the blade shaft 30 to move upward to adjust the position of the blade 31.

[0054] More specifically, a connecting cavity 51 is provided within the connector 50; the drive end is movably connected to the connecting cavity 51; and a stop step 35 is provided on the portion of the drive end located within the connecting cavity 51. The stop step 35 abuts against the top wall of the connecting cavity 51 to prevent the connector 50 from separating from the drive end. Thus, when the blade shaft 30 needs to be manually adjusted upward to a higher position where the blade 31 extends into the blender cup 80, the connector 50 can be driven upward by an external force. The connector 50 can first move relative to the drive end of the blade shaft 30. Once it abuts against the stop step 35 of the blade shaft 30, the blade shaft 31 can then be pulled upward to adjust the position of the blade 31.

[0055] Of course, limiting steps 35 can also be set at the top and bottom ends of the connecting cavity 51 respectively, so that the relative movement of the connecting head 50 and the driving end of the knife shaft 30 is limited within the upper and lower limiting steps 35, so that the range of movement of the two is limited.

[0056] It should be noted that the first elastic component 60 and the second elastic component 70 can both be implemented as spring structures in the prior art.

[0057] Furthermore, the sealing telescopic sleeve 40 includes a plurality of folded sections arranged axially along the blade shaft 30, with adjacent folded sections connected by an inclined surface or an arc surface. The sealing telescopic sleeve 40 is made of a sealant structure, and the specific sealant may be silicone or rubber. Made of silicone or rubber, the sealing telescopic sleeve 40 has a plurality of folded sections that can be folded or stretched when subjected to force, and adjacent folded sections are connected by an arc surface or an inclined surface. This creates a longer sealing telescopic sleeve 40 structure after the folded sections are stretched. After the folded sections are folded together, the inclined surface or arc surface is easily squeezed to form a relatively larger radial sealing surface. This ensures that the sealing telescopic sleeve 40 has a larger sealing surface when stretched or folded, and improves the sealing effect.

[0058] Example 2,

[0059] See also Figures 1 - 6 This embodiment provides a blending cup 80, including the blade assembly of embodiment 1.

[0060] After being applied to the blending cup 80, the blade holder 10 can be fixed to the bottom end of the blending cup 80. The bottom end of the blade holder 10 is a non-closed end. The blade shaft 30 of the blade assembly can extend from the bottom end of the blade holder 10, so that the blending cup 80 can be connected to the driving structure of the machine base after being assembled to the machine base. The driving structure drives the connecting head 50 to rotate, which can drive the blade shaft 30 to rotate, and then drive the blade 31 to rotate, so that the blade 31 rotates in the blending cup 80 to realize the stirring action.

[0061] When the blade 31 needs to be stirred at a higher height, an external force can be applied to the connector 50. When the force is applied to the connector 50, the blade shaft 30 can be driven to move upward relative to the blade shaft seat 20, so that the blade shaft 30 can move upward, driving the blade 31 connected to this end to move upward. The blade 31 can move to a relatively high height in the stirring cup 80, which is suitable for stirring different materials. The connector 50 connected to the transmission end of the blade shaft 30 can be connected to the drive structure.

[0062] When the blade shaft 30 is reset, it can be reset by applying force to the blade shaft 30, or it can be reset by an elastic component. Of course, it can be achieved by setting a lifting drive on the base of the blender. After the blending cup 80 is assembled to the base, the lifting drive structure moves upward to press the connector 50 structure of the blending cup 80, driving the connector 50 upward, thereby driving the blade shaft 30 upward. It can also be achieved by setting fixed lifting blocks of different heights on the base. After the blending cup 80 is assembled, the lifting block with the higher height pushes the connector 50 upward. It can also be achieved by manually applying force upward to the connector 50 to drive the blade shaft 30 upward. In short, any structure that can drive the connector 50 upward and thus link the blade shaft 30 upward is suitable.

[0063] It should be noted that, since one end of the sealing telescopic sleeve 40 is connected to the cutter shaft 30, and the other end of the sealing telescopic sleeve 40 is clamped at the installation position of the installation port 11 and the cutter shaft seat 20 after the cutter shaft seat 20 is assembled to the installation port 11, when the cutter shaft 30 moves upward, the sealing telescopic sleeve 40 can be driven to stretch upward, and the transmission end of the cutter shaft 30 used to connect to the drive structure and the connection structure inside the cutter shaft seat 20 can be sealed inside by the sealing telescopic sleeve 40. Even if the cutter shaft 30 moves upward, one end of the sealing telescopic sleeve 40 can maintain a seal between the cutter seat 10 and the cutter shaft seat 20.

[0064] Similarly, when the blade shaft 30 is reset, the blade shaft 30 moves downward, and the sealing telescopic sleeve 40 connected to the blade shaft 30 can be compressed when the blade shaft 30 is reset, and the sealing telescopic sleeve 40 can be compressed when the blade shaft 30 is reset.

[0065] A sealing ring 90 can be clamped between the bottom end of the stirring cup 80 and the bottom end of the cutter base 10. The sealing ring 90 is located on the outer ring of the assembly position of the cutter base 10 and the stirring cup 80, so that sealing and waterproofing can be achieved externally. The installation position of the cutter base 10 and the cutter shaft base 20 can be sealed by the sealing telescopic sleeve 40 on the inner ring, so that the sealing effect is better.

[0066] The technical means disclosed in the solution of the present utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present utility model.

Claims

1. A knife assembly capable of moving up and down, characterized in that, including, a tool holder, an installation cavity and an installation port are provided in the tool holder, and the installation port communicates with the installation cavity; a tool shaft mechanism, including a tool shaft, a tool shaft seat and a sealing telescopic sleeve, the tool shaft is rotatably installed on the tool shaft seat and can move up and down along the tool shaft seat; the sealing telescopic sleeve is sleeved outside the tool shaft, one end of the sealing telescopic sleeve is connected to the outer surface of the tool shaft, and the other end of the sealing telescopic sleeve is connected to the outside of the tool shaft seat; the tool shaft seat is installed in the installation cavity through the installation port, so that the sealing telescopic sleeve seals the installation port; one end of the tool shaft extends out of the sealing telescopic sleeve and is provided with a blade, the other end of the tool shaft forms a transmission end, and a connecting head is provided at the transmission end, and the connecting head is used to drive the tool shaft to move up and down when stressed.

2. The vertically movable knife assembly according to claim 1, wherein A connecting sleeve is provided around the inner wall of the installation port, a first thread section is provided on the inner wall of the connecting sleeve, and a second thread section is provided on the outer surface of the tool shaft seat, and the second thread section is thread-matched with the first thread section, so that the tool shaft seat is thread-connected to the installation port.

3. The vertically movable knife assembly according to claim 2, wherein A plurality of limiting tooth grooves are provided in the circumferential direction at the bottom end of the connecting sleeve; a limiting frame is provided around the bottom end of the tool shaft seat, and an elastic limiting portion is provided on the limiting frame, and the elastic limiting portion is used to be clamped into one of the limiting tooth grooves and exit the limiting tooth groove when the tool shaft seat rotates to be clamped into another adjacent limiting tooth groove.

4. The vertically movable knife assembly according to claim 3, wherein An avoidance port is provided on the limiting frame, the elastic limiting portion is an elastic buckle, one end of the elastic buckle is connected to the side wall of the avoidance port, and the elastic buckle extends out of the avoidance port and is clamped into the limiting tooth groove under the action of its own elastic stress.

5. The vertically movable knife assembly according to claim 1, wherein, The bottom end of the sealing telescopic sleeve is sleeved on the outer peripheral edge of the top end of the tool shaft seat; an upward extending sealing edge is provided on the outer peripheral edge of the bottom end of the sealing telescopic sleeve; a sealing groove is provided on the top wall of the installation port, and the sealing edge is used to extend into the sealing groove when the sealing telescopic sleeve seals the installation port.

6. The vertically movable knife assembly according to any one of claims 1-5, characterized in that, The tool shaft mechanism includes a first bearing, a second bearing and a shaft sleeve, the tool shaft is connected to the inside of the shaft sleeve through the first bearing; the shaft sleeve is connected to the inside of the tool shaft seat through the second bearing; a first elastic member is provided in the tool shaft seat; the first elastic member is used to provide a first elastic stress for driving the shaft sleeve to move downward.

7. The vertically movable knife assembly according to claim 6, wherein The transmission end extends out through the bottom end of the shaft sleeve and is connected to the connecting head; the connecting head is movably connected to the transmission end and can move up and down along the axial direction of the tool shaft; a second elastic member is provided inside the shaft sleeve, and the second elastic member is used to provide a second elastic stress for driving the connecting head to move downward.

8. The vertically movable knife assembly according to claim 7, characterized in that, A through cavity is provided inside the connecting head; the transmission end is movably inserted into the through cavity; a limiting step is provided at the part of the transmission end located in the through cavity; the limiting step is used to abut against the top wall of the through cavity to prevent the connecting head from separating from the transmission end.

9. The vertically movable knife assembly according to any one of claims 1-5, characterized in that, The sealing telescopic sleeve includes a plurality of folding segments arranged in the axial direction of the tool shaft, and adjacent two folding segments are connected by an inclined surface or an arc surface; the sealing telescopic sleeve is made of a sealant structure.

10. A mixing cup, comprising the cutter assembly according to any one of claims 1-9.

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