Knife disengaging detection device and ice cream machine

Abstract

The utility model provides a tool disengaging detection device and an ice cream machine. The tool disengaging detection device comprises an accommodating cavity arranged in the cutter shaft; the sliding assembly is arranged in the accommodating cavity in a sliding manner; the sensing device is arranged on the stirring device, when the stirring cutter assembly is installed in place on the cutter shaft, the sliding assembly slides in the first direction, the sensing device generates a first signal, and when the stirring cutter assembly is not installed in place on the cutter shaft, the sliding assembly slides in the second direction opposite to the first direction, and the sensing device generates a second signal; and the control device is connected with the sensing device and the driving device, and the control device is used for enabling the driving device to be started when receiving the first signal and limiting the driving device to be started when receiving the second signal. According to the tool disengagement detection device, the sliding assembly is arranged in the rotatable tool shaft, whether the detachable stirring tool is located at the designated working position or not in the using process can be detected in real time, tool disengagement shutdown can be achieved, and machine damage after tool disengagement is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of small household appliances, and in particular relates to a knife-off detection device and an ice cream machine with the knife-off detection device. Background Art

[0002] Ice cream is a very popular and favorite food, especially in the hot summer. Ice cream machines (or micro-purée machines) used to make ice cream have also been widely promoted and applied. Ice cream machines that use a lifting stirring knife to cut and mix frozen ingredients to make ice cream have the problem of the stirring knife falling off during operation. For example, a Chinese patent utility model with a utility model publication number of CN115606674A discloses a micro-purée machine. During the operation of the micro-purée machine, its blade assembly may fall off from the power shaft. Although the micro-purée machine is provided with a blade detection mechanism, the blade detection mechanism cannot detect whether the blade assembly falls off during the operation. Therefore, when the blade assembly falls off from the power shaft during the operation, the motor still drives the power shaft to rotate, which causes the knife shaft coupler or the stirring knife to be damaged and the machine cannot be used. Utility Model Content

[0003] In view of the above-mentioned problems existing in the prior art, the purpose of an embodiment of the utility model is to provide a knife-off detection component, which can detect in real time whether the detachable stirring knife assembly is in the designated working position during use, and can stop the machine when the knife is off, thereby avoiding damage to the machine after the knife is off.

[0004] The technical solution adopted in the embodiment of the utility model is a knife-off detection device, which is used on a stirring device, wherein the stirring device includes a knife shaft, a driving device for driving the knife shaft to rotate, and a stirring knife assembly that can be detachably mounted on the knife shaft, and the knife-off detection device includes:

[0005] An accommodating cavity is provided in the knife shaft and extends along the axial direction of the knife shaft;

[0006] A sliding assembly is disposed in the accommodating cavity and is capable of sliding in the accommodating cavity;

[0007] a sensing device, disposed on the stirring device and close to an end of the blade shaft away from the stirring blade assembly; when the stirring blade assembly is installed in place on the blade shaft, the sliding assembly slides in the accommodating cavity along a first direction, and the sensing device generates a first signal; when the stirring blade assembly is not installed in place on the blade shaft, the sliding assembly slides in the accommodating cavity along a second direction opposite to the first direction, and the sensing device generates a second signal;

[0008] A control device is connected to the sensing device and the driving device respectively, and is used to enable the driving device to start when the first signal is received, and to limit the driving device from starting when the second signal is received.

[0009] In an optional embodiment, the sliding assembly includes a sliding rod and an elastic member, the sliding rod is provided with a first magnetic component at one end facing the stirring blade assembly, and the stirring blade assembly is provided with a second magnetic component at one side thereof for connecting with the blade shaft, the first magnetic component and the second magnetic component are both magnets, or one of the two is a magnet and the other is a ferromagnetic component; when the stirring blade assembly is mounted on the blade shaft, the first magnetic component and the second magnetic component are attracted to drive the sliding rod to slide along the first direction and away from the sensing device, so that the sensing device generates the first signal;

[0010] The elastic member acts on the slide bar, and is used to apply a force to the slide bar to make it slide toward the second direction to approach the sensing device when the stirring blade assembly is disengaged from the blade shaft, so that the sensing device generates the second signal. The slide bar is driven to slide in the form of magnetic attraction, which has a simple structure and is easy to implement.

[0011] In an optional embodiment, the sliding assembly includes a sliding rod and an elastic member, a first magnet is provided at one end of the sliding rod facing the stirring blade assembly, a second magnet is provided at one side of the stirring blade assembly for connecting to the blade shaft, and the first magnet and the second magnet have the same poles facing each other; when the stirring blade assembly is mounted on the blade shaft, the first magnet and the second magnet repel each other to push the sliding rod to slide along the first direction and approach the sensing device, so that the sensing device generates the first signal;

[0012] The elastic member acts on the slide bar, and is used to apply a force to the slide bar to make it slide in the second direction away from the sensing device when the stirring blade assembly is disengaged from the blade shaft, so that the sensing device generates the second signal. The slide bar is driven to slide in the form of magnetic repulsion, which has a simple structure and is easy to implement.

[0013] In an optional embodiment, the sliding assembly includes a sliding rod and an elastic member, and a push component is provided on one side of the stirring blade assembly for connecting with the blade shaft, and when the stirring blade assembly is mounted on the blade shaft, the push component abuts against an end of the sliding rod facing the stirring blade assembly, and pushes the sliding rod to slide along the first direction and approach the sensing device, so that the sensing device generates the first signal;

[0014] The elastic member acts on the slide bar, and is used to apply a force to the slide bar to make it slide in the second direction away from the sensing device when the stirring blade assembly is disengaged from the blade shaft, so that the sensing device generates the second signal. The slide bar slides by directly pushing against it, which has higher stability.

[0015] In an optional embodiment, the sensing device includes any one of a contact switch, a magnetic switch, a Hall element or a photosensitive device. When the sensing device includes the contact switch, the sliding component is provided with a triggering portion for triggering the contact switch; when the sensing device includes the magnetic switch or the Hall element, the sliding component is provided with a magnet for acting on the magnetic switch and the Hall element respectively; when the sensing device includes a photosensitive device, the accommodating cavity is provided with a light emitting device for emitting a light beam to the photosensitive device. The sensing device can be flexibly selected according to actual needs.

[0016] In an optional embodiment, the elastic member is one of a spring, a spring sheet or an elastic rubber.

[0017] The present utility model also provides an ice cream machine, which includes the knife-off detection device described in any of the above embodiments. Since the ice cream machine has the knife-off detection device, it can detect in real time whether the detachable stirring knife assembly is in the designated working position during use, and can stop the machine when the knife is off, thereby avoiding damage to the machine after the knife is off.

[0018] In an optional embodiment, the ice cream machine further includes a housing, a knife shaft connected to the housing, a lifting device disposed in the housing, and a stirring cup disposed on the housing and below the knife shaft, the cup mouth cover of the stirring cup is provided with a stirring cup cover, the inner side of the stirring cup cover is provided with a stirring knife assembly in a magnetic manner, and the stirring cup cover is provided with a through hole for the knife shaft to pass through, the lower end of the knife shaft is connected to a stirring knife connector, the lifting device is used to drive the knife shaft and / or the stirring cup to move toward each other so that the lower end of the knife shaft can pass through the through hole, and the stirring knife connector is coupled to the stirring knife assembly and drives the stirring knife assembly to rotate, thereby cutting the frozen food in the stirring cup layer by layer. The stirring knife assembly is fixed in the stirring cup cover by magnetic attraction, which can improve safety performance.

[0019] In an optional embodiment, the ice cream machine further includes a housing, a knife shaft connected to the housing, a lifting device disposed in the housing, and a stirring cup disposed on the housing and below the knife shaft, the mouth of the stirring cup being open; the lower end of the knife shaft is connected to a stirring knife connector, a stirring knife assembly is detachably mounted on the stirring knife connector, and the lifting device is used to drive the knife shaft and / or the stirring cup to move toward each other, so that the stirring knife assembly extends into the stirring cup to cut the frozen food in the stirring cup layer by layer. The stirring knife assembly is directly mounted on the stirring knife connector, which is simple to operate and convenient to use.

[0020] In an optional embodiment, the upper end of the blade shaft is connected to the driving device through a transmission mechanism, a driving wheel is provided on the output shaft of the driving device, the transmission mechanism includes a first transmission wheel, a second transmission wheel and a third transmission wheel, the first transmission wheel is connected to the driving wheel through a transmission belt, the second transmission wheel is coaxially arranged with the first transmission wheel and rotates synchronously, the third transmission wheel is meshed with the second transmission wheel, wherein the gear ratio between the third transmission wheel and the second transmission wheel is greater than 1. The transmission mechanism has stable transmission, and can reduce the rotation speed of the blade shaft, increase the torque, and improve the cutting ability of the stirring blade assembly for frozen food.

[0021] Compared with the prior art, the beneficial effect of the embodiment of the utility model is that the knife-off detection device of the utility model can detect in real time whether the detachable mixing knife is in the designated working position during use, and can stop the machine when the knife is off, thus avoiding damage to the machine after the knife is off. Moreover, the main part of the knife-off detection device is arranged in the rotating knife shaft, and can avoid friction with the non-moving parts of the product. The detection method is real-time, durable and reliable.

[0022] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not intended to restrict the present invention.

[0023] The overview of various implementations or examples of the technology described in this utility model is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar components in different views. The drawings generally illustrate various embodiments by way of example and not limitation, and together with the specification and claims, are used to illustrate the embodiments of the utility model. When appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts.

[0025] Figure 1 This is a structural schematic diagram of a knife-off detection device according to an embodiment of the utility model applied to an ice cream machine.

[0026] Figure 2 for Figure 1 sectional view of .

[0027] Figure 3 and Figure 4 They are Figure 1 Exploded image from different perspectives.

[0028] Figure 5 The utility model is a schematic diagram of the structure of an ice cream machine according to an embodiment of the present invention.

[0029] Figure 6 for Figure 5 sectional view of .

[0030] Figure 7 for Figure 5 Exploded diagram.

[0031] Figure 8 Another structural schematic diagram of an ice cream machine according to an embodiment of the utility model.

[0032] Fig. 9 for Figure 8 sectional view of .

[0033] Fig.10 for Figure 8 Exploded diagram.

[0034] Reference numerals:

[0035] 1-accommodating chamber; 2-sliding rod; 3-elastic member; 4-first magnetic attraction component; 5-sensing device;

[0036] 10-housing; 20-blade shaft; 21-mixing blade connector; 30-mixing blade assembly; 31-second magnetic component; 40-lifting platform; 41-cup holder; 50-driving device; 51-driving wheel; 52-transmission belt; 53-first transmission wheel; 54-second transmission wheel; 55-third transmission wheel; 60-lifting device; 70-mixing cup; 80-mixing cup cover; 81-magnet. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0039] In order to keep the following description of the embodiments of the present invention clear and concise, the present invention omits detailed descriptions of known functions and known components.

[0040] like Figures 1 to 4 As shown, an embodiment of the utility model provides a blade-off detection device, which is applied to a stirring device. The stirring device includes a blade shaft 20, a driving device 50 for driving the blade shaft 20 to rotate, and a stirring blade assembly 30 that can be detachably mounted on the blade shaft 20. The blade-off detection device is used to detect whether the stirring blade assembly 30 is installed in place on the blade shaft 20.

[0041] like Figures 2 to 4 As shown, the blade-off detection device comprises a housing chamber 1, a sliding assembly, a sensing device 5 and a control device. The housing chamber 1 is arranged in the blade shaft 20 and extends in the axial direction of the blade shaft 20. The sliding assembly is arranged in the housing chamber 1 and can slide in the axial direction of the blade shaft 20 in the housing chamber 1. The sensing device 5 is arranged on the stirring device and is close to the end of the blade shaft 20 away from the stirring blade assembly 30. The sensing device 5 is used to detect the position of the sliding assembly. When the stirring blade assembly 30 is installed in place on the blade shaft 20, the sliding assembly slides in the housing chamber 1 in a first direction, and the sensing device 5 generates a first signal. When the stirring blade assembly 30 is not installed in place on the blade shaft 20, the sliding assembly slides in the housing chamber 1 in a second direction opposite to the first direction, and the sensing device 5 generates a second signal. The control device is connected to the sensing device 5 and the driving device 50 respectively. The control device is used to enable the driving device 50 to be turned on when the first signal is received, and is used to limit the driving device 50 from being turned on when the second signal is received.

[0042] The blade-off detection device of the embodiment of the utility model can, when the stirring blade assembly 30 is installed to the designated working position of the blade shaft 20, push the sliding assembly to slide along the first direction through the stirring blade assembly 30, change its position relative to the sensing device 5, so that the sensing device 5 generates a first signal, and then the driving device 50 can drive the blade shaft 20 to drive the stirring blade assembly 30 to rotate to achieve the cutting operation; and when the stirring blade assembly 30 is separated from the designated working position of the blade shaft 20, the sliding assembly slides along the second direction, changes its position relative to the sensing device 5, so that the sensing device 5 generates a second signal, and then the driving device 50 stops driving the blade shaft 20 to drive the stirring blade to stop working. The blade-off detection device of the embodiment of the utility model can not only detect whether the stirring blade assembly 30 is installed in place in the non-working state, but also detect whether the stirring blade assembly 30 is installed in place during the working process, so as to avoid the stirring blade assembly 30 and the stirring cup 70 being damaged by the blade shaft 20 continuing to rotate after the stirring blade assembly 30 is separated from the blade shaft 20 during the working process.

[0043] It can be understood that the stirring blade assembly 30 being disengaged from the blade shaft 20 includes both the stirring blade assembly 30 being completely disengaged from the blade shaft 20 and the stirring blade assembly 30 being still on the blade shaft 20 but being disengaged from the designated working position of the blade shaft 20 where the stirring blade assembly 30 is installed. When the stirring blade assembly 30 is only disengaged (deviated) from the designated working position but not completely disengaged from the blade shaft 20, if the blade shaft 20 rotates at this time, it may also drive the stirring blade assembly 30 to rotate in an offset manner, and the stirring blade assembly 30 may hit the stirring cup 70 during the rotation process, thereby causing damage to the stirring blade assembly 30 and / or the stirring cup 70.

[0044] In some embodiments, Figures 2 to 4As shown, the sliding assembly includes a sliding rod 2 and an elastic member 3, and a first magnetic attraction component 4 is provided at one end of the sliding rod 2 facing the stirring blade assembly 30. The stirring blade assembly 30 is provided with a second magnetic attraction component 31 on one side of the blade shaft 20 for installation. The first magnetic attraction component 4 and the second magnetic attraction component 31 are both magnets, or one of them is a magnet and the other is a ferromagnetic component. When the stirring blade assembly 30 is installed on the blade shaft 20, the first magnetic attraction component 4 and the second magnetic attraction component 31 are attracted to drive the sliding rod 2 to slide in the first direction away from the sensing device 5, so that the sensing device 5 generates a first signal. The elastic member 3 acts on the sliding rod 2, and is used to apply a force to the sliding rod 2 to make it slide in the second direction to approach the sensing device 5 when the stirring blade assembly 30 is disengaged from the blade shaft 20, so that the sliding rod 2 is reset, and the sensing device 5 generates a second signal. The structure of the sliding assembly is simple and reasonable. By respectively arranging two magnetically attractive components on the sliding rod 2 and the stirring blade assembly 30, the stirring blade assembly 30 can make the sliding rod 2 slide in different directions when it is installed on the blade shaft 20 or detached from the blade shaft 20, so as to respectively make the sensing device 5 generate the first signal and the second signal, and the control device can start the driving device 50 or limit the starting of the driving device 50.

[0045] For example, Figure 2 As shown, the induction device 5 is arranged at a position of the upper end of the stirring device close to the blade shaft 20, and the lower end of the slide bar 2 is provided with a first magnetic attraction component 4. The stirring blade assembly 30 is used to be installed at the lower end of the blade shaft 20. When the stirring blade assembly 30 is installed at the lower end of the blade shaft 20, the second magnetic attraction component 31 on the stirring blade assembly 30 and the first magnetic attraction component 4 at the lower end of the slide bar 2 generate magnetic attraction, driving the slide bar 2 to slide in a first downward direction, the slide bar 2 moves away from the induction device 5 and exits the induction area of ​​the induction device 5, the induction device 5 generates a first signal, the control device receives the first signal and can start the driving device 50.

[0046] In some embodiments, the sliding assembly includes a sliding rod 2 and an elastic member 3. A first magnet is provided at one end of the sliding rod 2 facing the stirring blade assembly 30. A second magnet is provided at one side of the stirring blade assembly 30 for connecting with the blade shaft 20. The first magnet and the second magnet have the same poles facing each other. When the stirring blade assembly 30 is mounted on the blade shaft 20, the first magnet and the second magnet repel each other to push the sliding rod 2 to slide in a first direction and approach the sensing device 5, so that the sensing device 5 generates a first signal. The elastic member 3 acts on the sliding rod 2 to apply a force to the sliding rod 2 to make it slide in a second direction to move away from the sensing device 5 when the stirring blade assembly 30 is disengaged from the blade shaft 20. The sliding rod 2 is reset, and the sensing device 5 generates a second signal. The sliding assembly has a simple and reasonable structure. By arranging two magnets with the same poles facing each other on the sliding rod 2 and the stirring blade assembly 30 respectively, the stirring blade assembly 30 can make the sliding rod 2 slide in different directions when it is installed on the blade shaft 20 or detached from the blade shaft 20, so as to make the sensing device 5 generate the first signal and the second signal respectively, and the control device can start the driving device 50 or limit the starting of the driving device 50.

[0047] Exemplarily, the sensing device 5 is disposed at a position of the stirring device near the upper end of the blade shaft 20, and a first magnet is disposed at the lower end of the slide bar 2. The stirring blade assembly 30 is used to be installed at the lower end of the blade shaft 20. When the stirring blade assembly 30 is installed at the lower end of the blade shaft 20, the second magnet on the stirring blade assembly 30 and the first magnet at the lower end of the slide bar 2 repel each other and push the slide bar 2 to slide in a first upward direction, the slide bar 2 approaches the sensing device 5 and enters the sensing area of ​​the sensing device 5, the sensing device 5 generates a first signal, the control device receives the first signal and can start the driving device 50.

[0048] In some embodiments, a push component (not shown in the figure) may be provided on one side of the stirring blade assembly 30 for connecting with the blade shaft 20. When the stirring blade assembly 30 is mounted on the blade shaft 20, the push component abuts against one end of the slide bar 2 facing the stirring blade assembly 30, and pushes the slide bar 2 to slide along the first direction toward the direction close to the sensing device 5, so that the sensing device 5 generates a first signal. The elastic member 3 acts on the slide bar 2, and is used to apply a force to the slide bar 2 to slide in the second direction away from the sensing device 5 when the stirring blade assembly 30 is disengaged from the blade shaft 20, so that the slide bar 2 is reset, and the sensing device 5 generates a second signal.

[0049] Exemplarily, when the stirring blade assembly 30 is installed at the lower end of the blade shaft 20, the pushing component on the stirring blade assembly 30 abuts against the lower end of the slide rod 2 and pushes the slide rod 2 to slide upward, the slide rod 2 approaches the sensing device 5 and enters the sensing area of ​​the sensing device 5, the sensing device 5 generates a first signal, the control device receives the first signal and is able to start the driving device 50.

[0050] It can be understood from the above embodiments that the first direction can be a direction for the slide bar 2 to move toward the sensing device 5, or a direction for the slide bar 2 to move away from the sensing device 5. The slide bar 2 can cause the sensing device 5 to generate the first signal when entering the sensing area of ​​the sensing device 5, or can cause the sensing device 5 to generate the first signal when exiting the sensing area of ​​the sensing device 5.

[0051] The specific structural form of the sensing device 5 is not limited, and its sensing method is not limited. The sensing method can be, for example, a method of being directly resisted by the slide bar 2, or a remote sensing method, or a photoelectric sensing method, or a magnet sensing Hall element method, etc.

[0052] In some embodiments, the sensing device 5 includes any one of a contact switch, a magnetic switch, a Hall element or a photosensitive device.

[0053] When the sensing device 5 includes a contact switch, a triggering portion for triggering the contact switch is provided on the sliding assembly. Specifically, the contact switch can be a micro switch. A triggering portion is provided at the upper end of the slide bar 2 of the sliding assembly. When the stirring blade assembly 30 is mounted on the lower end of the blade shaft 20, the slide bar 2 slides along the first direction, and the triggering portion triggers the micro switch or releases the triggering of the micro switch. The micro switch generates a first signal and sends it to the control device, and the control device controls the driving device 50 to start. When the stirring blade assembly 30 is disengaged from the blade shaft 20, the slide bar 2 slides along the second direction under the action of the elastic member 3, and releases the triggering of the micro switch or triggers the micro switch. The micro switch generates a second signal and sends it to the control device, and the control device prohibits the driving device 50 from starting. That is, when the slide bar 2 slides along the first direction, the micro switch can be triggered or released. Whether it is triggered or released, the micro switch generates the first signal. If the micro switch is triggered when the slide bar 2 slides in the first direction, the micro switch is released when the slide bar 2 slides in the second direction, and vice versa.

[0054] When the induction device 5 includes a magnetic switch or a Hall element, a magnet for acting on the magnetic switch and the Hall element is provided on the sliding assembly. When the stirring blade assembly 30 is installed at the lower end of the blade shaft 20, the sliding rod 2 slides in a first direction (the first direction can be a direction close to the induction device 5 or a direction away from the induction device 5), the magnet acts on the magnetic switch or the Hall element, or the magnet releases the action on the magnetic switch or the Hall element, the magnetic switch or the Hall element generates a first signal and sends it to the control device, and the control device controls the driving device 50 to start. When the stirring blade assembly 30 is disengaged from the blade shaft 20, the sliding rod 2 slides in a second direction under the action of the elastic member 3, the magnet releases the action on the magnetic switch or the Hall element, or the magnet acts on the magnetic switch or the Hall element, the magnetic switch or the Hall element generates a second signal and sends it to the control device, and the control device prohibits the driving device 50 from starting.

[0055] When the sensing device 5 includes a photosensitive device, a light-emitting device for emitting a light beam to the photosensitive device is provided in the accommodating cavity 1. When the stirring blade assembly 30 is mounted on the lower end of the blade shaft 20, the slide bar 2 slides along a first direction (the first direction can be a direction close to the sensing device 5 or a direction away from the sensing device 5), the slide bar 2 avoids the light beam, the photosensitive device can receive the light beam, or the slide bar 2 blocks the light beam, the photosensitive device cannot receive the light beam, the photosensitive device generates a first signal, and sends it to the control device, and the control device enables the driving device 50 to start. When the stirring blade assembly 30 is disengaged from the blade shaft 20, the slide bar 2 slides along a second direction under the action of the elastic member 3, the slide bar 2 blocks the light beam, the photosensitive device cannot receive the light beam, or the slide bar 2 avoids the light beam, the photosensitive device can receive the light beam, the photosensitive device generates a second signal, and sends it to the control device, and the control device prohibits the driving device 50 from starting. That is, if the slide bar 2 avoids the light beam when sliding in the first direction, it blocks the light beam when sliding in the second direction; if the slide bar 2 blocks the light beam when sliding in the first direction, it avoids the light beam when sliding in the second direction.

[0056] That is, in the above embodiments, when the direction in which the slide bar 2 slides toward the sensing device 5 is the first direction, the direction in which the slide bar 2 slides away from the sensing device 5 is the second direction, and vice versa, when the direction in which the slide bar 2 slides away from the sensing device 5 is the first direction, the direction in which the slide bar 2 slides toward the sensing device 5 is the second direction. The slide bar 2 may enter the sensing area of ​​the sensing device 5 so that the sensing device 5 generates the first signal, or the slide bar 2 may exit the sensing area of ​​the sensing device 5 so that the sensing device 5 generates the first signal.

[0057] The sliding assembly of the knife-off detection device of the embodiment of the utility model is arranged in the rotating knife shaft 20, and may not rub against the non-moving parts of the product. The detection method is real-time, durable and reliable.

[0058] like Figure 2 and Figure 4 As shown, the accommodating chamber 1 may penetrate both ends of the blade shaft 20 in the axial direction, or may only penetrate one end of the blade shaft 20 in the axial direction, or both ends of the accommodating chamber 1 do not penetrate to both ends of the blade shaft 20 in the axial direction. When the sensing device 5 is triggered by the slide rod 2 in a direct contact manner or a light sensing manner, at least the accommodating chamber 1 is penetrated to one end of the blade shaft 20 facing the sensing device 5, so that the upper end of the slide rod 2 arranged in the accommodating chamber 1 can extend out of the upper end of the blade shaft 20, so as to directly trigger the sensing device 5, and also avoid the blade shaft 20 from blocking the remote sensing of the light sensing manner. A stirring blade connector 21 is provided at the lower end of the blade shaft 20, the upper end of which extends into the accommodating chamber 1, and the lower end of which is exposed outside the lower end of the blade shaft 20. A mounting cavity is provided on one side of the stirring blade assembly 30 for connecting with the blade shaft 20 , and the lower end of the stirring blade connector 21 can extend into the mounting cavity to connect the stirring blade assembly 30 to the blade shaft 20 .

[0059] Continue to combine Figures 2 to 4 , the first magnetic component 4 can be in the shape of a long rod and is fixed to the end of the slide bar 2 away from the induction device 5 (the lower end of the slide bar 2), and the first magnetic component 4 is coaxial with the slide bar 2. A mounting hole is provided in the stirring blade connector 21 along the axial direction of the blade shaft 20, and the first magnetic component 4 extends into the mounting hole. The elastic member 3 is sleeved on the outer side of the first magnetic component 4 between the slide bar 2 and the stirring blade connector 21, and the two ends are respectively against the slide bar 2 and the stirring blade connector 21. The second magnetic component 31 can be in the shape of a block and is fixed to the bottom of the assembly cavity of the stirring blade assembly 30. In this way, the first magnetic component 4 and the second magnetic component 31 can be relatively close to each other, ensuring that when the stirring blade assembly 30 is installed on or removed from the blade shaft 20, the slide bar 2 can slide under the action of the two magnetic components.

[0060] The specific structural form of the elastic member 3 is not limited, and can be, for example, a spring, a spring sheet, or an elastic rubber.

[0061] like Figures 5 to 10 As shown, the embodiment of the utility model further provides an ice cream machine, which includes the knife-off detection device in any of the above embodiments. The ice cream machine with the knife-off detection device can detect in real time whether the detachable stirring knife assembly 30 is in the designated working position during use, and can stop the machine when the knife is off, thereby avoiding damage to the machine after the knife is off.

[0062] In some embodiments, the combination Figures 5 to 7The ice cream machine also includes a casing 10, a knife shaft 20 connected to the casing 10, a lifting device 60 arranged in the casing 10, and a stirring cup 70 arranged on the casing 10 and located below the knife shaft 20. The cup mouth cover of the stirring cup 70 is provided with a stirring cup cover 80, and the inner side of the stirring cup cover 80 is provided with a stirring knife assembly 30 in a magnetic manner, and the stirring cup cover 80 is provided with a through hole for the knife shaft 20 to pass through. The lower end of the knife shaft 20 is connected to the stirring knife connector 21. The lifting device 60 is used to drive the knife shaft 20 and / or the stirring cup 70 to move toward each other so that the lower end of the knife shaft 20 can pass through the through hole, and the stirring knife connector 21 is coupled to the stirring knife assembly 30 and drives the stirring knife assembly 30 to rotate, and the stirring knife assembly 30 cuts and stirs the frozen food in the stirring cup 70 layer by layer.

[0063] A magnet 81 or a ferromagnetic component that is attracted to the magnet is provided on the inner side of the mixing cup cover 80, so that the mixing blade assembly 30 can be attracted and fixed in the mixing cup cover 80 by magnetic force, which can improve the safety performance. When the mixing cup 70 and the blade shaft 20 move toward each other to a certain position, the blade shaft 20 extends into the cup cover, and the mixing blade is coupled to the mixing blade connector 21 of the blade shaft 20.

[0064] In some embodiments, Figures 8 to 10 As shown, the mouth of the mixing cup 70 is open, the mixing cup 70 is not provided with a mixing cup cover 80, and the mixing blade assembly 30 is detachably mounted on the mixing blade connector 21. The lifting device 60 drives the blade shaft 20 and / or the mixing cup 70 to move toward each other, so that the blade shaft 20 drives the mixing blade assembly 30 to extend into the mixing cup 70, and the mixing blade assembly 30 cuts and mixes the frozen food in the mixing cup 70 layer by layer. The mixing cup cover 80 is omitted, which can simplify the structure and facilitate use.

[0065] Figure 6 , Figure 7 , Fig. 9 and Fig.10 Only the lifting device 60 is shown for driving the stirring cup 70 to move upward, and the lifting device 60 for driving the blade shaft 20 to move up and down is not shown. This part can be implemented using the structure in the prior art, and the utility model will not make too many introductions to this.

[0066] In some embodiments, Figure 7 and Fig.10 , and combined with Figure 1 and Figure 2As shown, the upper end of the knife shaft 20 is connected to the driving device 50 through a transmission mechanism, and the driving device 50 can be a motor, and a driving wheel 51 is provided on the output shaft of the motor. The transmission mechanism includes a first transmission wheel 53, a second transmission wheel 54 and a third transmission wheel 55, the first transmission wheel 53 is connected to the driving wheel 51 through a transmission belt 52, the second transmission wheel 54 is coaxially arranged with the first transmission wheel 53 and rotates synchronously, and the third transmission wheel 55 is meshed with the second transmission wheel 54, wherein the gear ratio between the third transmission wheel 55 and the second transmission wheel 54 is greater than 1. The knife shaft 20 can be decelerated by the transmission mechanism.

[0067] Exemplarily, the housing 10 includes a bottom shell, a lifting platform 40 is provided on the bottom shell, a cup holder 41 is provided on the lifting platform 40, the blending cup 70 can be placed on the cup holder 41, and a lifting mechanism is connected to the lifting platform 40 for driving the lifting platform 40 to move up and down, thereby driving the blending cup 70 to move up and down.

[0068] The working process of the ice cream machine of the utility model embodiment is described below:

[0069] After placing ice cream recipe ingredients in the mixing cup 70, deep freezing is performed, and then the cup cover with the mixing blade is installed on the cup mouth of the mixing cup 70 with frozen ingredients, and then the mixing cup 70 is buckled on the cup seat 41 of the lifting platform 40. The lifting device 60 is started, and the lifting device 60 drives the mixing cup 70 to slide toward the blade shaft 20. After sliding for a certain stroke, the blade shaft 20 extends into the mixing cup 70, and the mixing blade assembly 30 is coupled to the mixing blade connector 21 at the connector end of the blade shaft 20. The slide bar 2 slides along the first direction. At this time, the sensing device 5 is activated and generates a first signal. The driving device 50 works to make the blade shaft 20 drive the mixing blade assembly 30 to start rotating and cutting the ingredients in the mixing cup 70. After the stirring is completed, the lifting device 60 drives the lifting platform 40 and the stirring cup 70 to slide in the direction away from the blade shaft 20. After sliding for a certain distance, the stirring blade assembly 30 is separated from the stirring blade connector 21, and the stirring blade assembly 30 is re-adsorbed on the stirring blade installation position of the stirring cup cover 80. Then the blade shaft 20 and the stirring blade connector 21 are moved out of the stirring cup 70 to complete the stirring. After the stirring is completed, the stirring cup cover 80 is opened (at this time, the stirring blade assembly 30 is attracted to the stirring cup cover 80), and the muddy ice cream in the cup can be enjoyed. The stirring cup cover 80 and the stirring blade assembly 30 can be directly put into the dishwasher for cleaning (the stirring blade assembly 30 can be removed for easy cleaning). If the cutting and mixing process is stopped midway, it is easy to cause the mixing blade assembly 30 to detach from the mixing blade connector 21. If the mixing blade assembly 30 detaches from the blade shaft 20, the slide bar 2 slides along the second direction, the sensing device 5 is activated and generates a second signal, the control device receives the second signal and controls the driving mechanism to stop, and the blade shaft 20 stops rotating, thereby avoiding damage to the mixing blade assembly 30 and the mixing cup 70.

[0070] The above description is intended to be illustrative rather than restrictive, and those skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure. Moreover, the above examples (or one or more of them) may be used in combination with each other, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations.

Claims

1. A blade-off detection device for use on a stirring device, the stirring device comprising a blade shaft (20), a driving device (50) for driving the blade shaft (20) to rotate, and a stirring blade assembly (30) that can be detachably mounted on the blade shaft (20), characterized in that: The knife-off detection device comprises: An accommodating cavity (1) is provided in the knife shaft (20) and extends along the axial direction of the knife shaft (20); A sliding assembly is provided in the accommodating cavity (1) and is capable of sliding in the accommodating cavity (1); a sensing device (5) provided on the stirring device and close to an end of the blade shaft (20) away from the stirring blade assembly (30), for detecting the position of the sliding assembly; when the stirring blade assembly (30) is installed in place on the blade shaft (20), the sliding assembly slides in a first direction in the accommodating cavity (1), and the sensing device (5) generates a first signal; when the stirring blade assembly (30) is not installed in place on the blade shaft (20), the sliding assembly slides in a second direction opposite to the first direction in the accommodating cavity (1), and the sensing device (5) generates a second signal; A control device is connected to the sensing device (5) and the driving device (50), respectively. The control device is used to enable the driving device (50) to be turned on when the first signal is received, and to limit the turning on of the driving device (50) when the second signal is received.

2. The tool-off detection device according to claim 1, characterized in that: The sliding assembly includes a sliding rod (2) and an elastic member (3); a first magnetic attraction component (4) is provided on one end of the sliding rod (2) facing the stirring blade assembly (30); a second magnetic attraction component (31) is provided on one side of the stirring blade assembly (30) for connecting with the blade shaft (20); the first magnetic attraction component (4) and the second magnetic attraction component (31) are both magnets, or one of the two is a magnet and the other is a ferromagnetic component; when the stirring blade assembly (30) is installed on the blade shaft (20), the first magnetic attraction component (4) and the second magnetic attraction component (31) are attracted to drive the sliding rod (2) to slide along the first direction and away from the sensing device (5), so that the sensing device (5) generates the first signal; The elastic member (3) acts on the slide bar (2) and is used to apply a force to the slide bar (2) to make it slide toward the second direction to approach the sensing device (5) when the stirring blade assembly (30) is disengaged from the blade shaft (20), so that the sensing device (5) generates the second signal.

3. The tool-off detection device according to claim 1, wherein: The sliding assembly comprises a sliding rod (2) and an elastic member (3); a first magnet is provided on one end of the sliding rod (2) facing the stirring blade assembly (30); a second magnet is provided on the side of the stirring blade assembly (30) for connecting with the blade shaft (20); the first magnet and the second magnet have the same poles facing each other; when the stirring blade assembly (30) is mounted on the blade shaft (20), the first magnet and the second magnet repel each other, so as to push the sliding rod (2) to slide along the first direction and approach the sensing device (5), so that the sensing device (5) generates the first signal; The elastic member (3) acts on the slide bar (2) and is used to apply a force to the slide bar (2) to make it slide in the second direction away from the sensing device (5) when the stirring blade assembly (30) is disengaged from the blade shaft (20), so that the sensing device (5) generates the second signal.

4. The tool-off detection device according to claim 1, wherein: The sliding assembly comprises a sliding rod (2) and an elastic member (3); a side of the stirring blade assembly (30) for connecting with the blade shaft (20) is provided with a pushing member; when the stirring blade assembly (30) is mounted on the blade shaft (20), the pushing member abuts against an end of the sliding rod (2) facing the stirring blade assembly (30), and pushes the sliding rod (2) to slide along the first direction and approach the sensing device (5), so that the sensing device (5) generates the first signal; The elastic member (3) acts on the slide bar (2) and is used to apply a force to the slide bar (2) to make it slide in the second direction away from the sensing device (5) when the stirring blade assembly (30) is disengaged from the blade shaft (20), so that the sensing device (5) generates the second signal.

5. The tool slip detection device according to any one of claims 1 to 4, characterized in that: The sensing device (5) includes any one of a contact switch, a magnetic switch, a Hall element or a photosensitive device. When the sensing device (5) includes the contact switch, the sliding component is provided with a triggering portion for triggering the contact switch; when the sensing device (5) includes the magnetic switch or the Hall element, the sliding component is provided with magnets for respectively acting on the magnetic switch and the Hall element; when the sensing device (5) includes the photosensitive device, the accommodating cavity (1) is provided with a light-emitting device for emitting a light beam to the photosensitive device.

6. The tool slip detection device according to any one of claims 2 to 4, characterized in that: The elastic member (3) is one of a spring, a spring sheet or an elastic rubber.

7. An ice cream machine, characterized in that: The ice cream machine comprises the knife-off detection device according to any one of claims 1 to 6.

8. The ice cream machine according to claim 7, characterized in that The ice cream machine further comprises a housing (10), a blade shaft (20) connected to the housing (10), a lifting device (60) provided in the housing (10), and a stirring cup (70) provided on the housing (10) and below the blade shaft (20), wherein the cup cover of the stirring cup (70) is provided with a stirring cup cover (80), the inner side of the stirring cup cover (80) is provided with a stirring blade assembly (30) in a magnetic manner, and the stirring cup cover (80) is provided with a device for making the stirring blade assembly (30) move. The blade shaft (20) passes through the through hole, the lower end of the blade shaft (20) is connected to the stirring blade connector (21), the lifting device (60) is used to drive the blade shaft (20) and / or the stirring cup (70) to move toward each other, so that the lower end of the blade shaft (20) can pass through the through hole, and the stirring blade connector (21) is coupled to the stirring blade assembly (30) and drives the stirring blade assembly (30) to rotate, thereby cutting the frozen food in the stirring cup (70) layer by layer.

9. The ice cream machine according to claim 7, characterized in that The ice cream machine further comprises a housing (10), a blade shaft (20) connected to the housing (10), a lifting device (60) arranged in the housing (10), and a stirring cup (70) arranged on the housing (10) and located below the blade shaft (20), wherein the mouth of the stirring cup (70) is open; the lower end of the blade shaft (20) is connected to a stirring blade connector (21), and a stirring blade assembly (30) is detachably mounted on the stirring blade connector (21); the lifting device (60) is used to drive the blade shaft (20) and / or the stirring cup (70) to move toward each other, so that the stirring blade assembly (30) extends into the stirring cup (70) and cuts the frozen food in the stirring cup (70) layer by layer.

10. The ice cream machine according to claim 8 or 9, characterized in that: The upper end of the knife shaft (20) is connected to the driving device (50) through a transmission mechanism, and a driving wheel (51) is provided on the output shaft of the driving device (50). The transmission mechanism includes a first transmission wheel (53), a second transmission wheel (54) and a third transmission wheel (55), the first transmission wheel (53) and the driving wheel (51) are connected through a transmission belt (52), the second transmission wheel (54) and the first transmission wheel (53) are coaxially arranged and rotate synchronously, and the third transmission wheel (55) is meshed with the second transmission wheel (54), wherein the gear ratio between the third transmission wheel (55) and the second transmission wheel (54) is greater than 1.

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