Cooking preparation appliance comprising a coupling for transmitting movement

Abstract

The utility model relates to the cooking preparation appliance including the coupling for transmitting motion, it includes the improved coupling for transmitting motion between the motor block and the stirrer cup. The cooking preparation appliance includes the base that contains the electric motor, the knife group that can remove the installation on base, and the coupling for transmitting motion between the motor block and the knife group. The coupling includes: a) the upper metal part for driving the knife group, b) the lower plastic part is coupled to the motor shaft, wherein the upper metal part is connected to the lower plastic part. The improvement lies in that the coupling (10) has the combination of metal and plastic part (12), which shows the improved resistance and electrical insulation.

Description

Technical Field

[0001] This invention relates to a cooking preparation appliance comprising an improved connector for transmitting motion between a motor block and a blender cup. The improvement lies in the connector having a combination of metal and plastic portions, exhibiting improved resistance and electrical insulation. Background Technology

[0002] Some appliances and devices, such as mixers and food processors, use electric motors and couplings to transmit torque from the motor shaft to the blades of the appliance.

[0003] Because the motor used is an electric motor, insulation must be provided between the motor and the blade to avoid the possibility of electric shock to the user. Many connectors currently manufactured use rubber as the insulating material. These materials typically use carbon black, which must be properly formulated and stirred to ensure it is non-conductive.

[0004] Several Oster products utilize this intermediate rubber to enhance electrical insulation. A disadvantage of using rubber is that it breaks down quickly, shortening the lifespan of connectors and products.

[0005] Another common approach is to use plastic components instead of metal components, because plastic is an insulator and can be easily molded into any desired shape. The disadvantages of using plastic components are that they lack the necessary resistance and have a shorter lifespan compared to metal components.

[0006] Given these drawbacks, document US5795232 combines plastic and metal components to produce a non-conductive connector that is simple to manufacture, easy to assemble, and symmetrical, thus preventing incorrect installation. The connector consists of an elongated plastic body with two pairs of parallel channels, each receiving a threaded insert, one connected to the motor shaft and the other to the blade. The channels are configured so that the inserts do not contact each other, ensuring insulation of the connector.

[0007] Document US8087818 discloses a blade-motor connector for a mixer, the mixer including a convex connector responsive to an electromagnetic field and a concave connector coupled to a motor. The convex connector is typically metallic, while the concave connector is typically non-metallic.

[0008] Therefore, the main drawback of the prior art is that all these existing solutions are not durable, have low electrical insulation capabilities, and low torque resistance. There is a need for a cooking preparation appliance that includes a connector with higher durability and stronger resistance to mechanical and thermal stresses. Utility Model Content

[0009] In a first aspect, the present invention discloses a cooking preparation utensil including a connector (10) for transmitting motion between a motor block (20) and a knife assembly (30), the connector providing insulation and durability.

[0010] The purpose of this utility model is to provide a cooking preparation appliance, including a connector (10) for transmitting motion between a motor block (20) and a knife assembly (30), the connector (10) comprising:

[0011] a) Upper metal part (11), which is used to drive the tool assembly (30);

[0012] b) The lower plastic part (12) is connected to the motor shaft (21);

[0013] The upper metal part (11) is connected to the lower plastic part (12).

[0014] The lower plastic part (12) has a longitudinal opening extending through the entire length of the body and accommodates a nut (13) which is screwed onto the motor block (20). The lower plastic part (12) also has a rounded protrusion (14) for connection to the metal part (11).

[0015] The main advantage of this invention is that it provides a cooking preparation appliance with a durable connector comprising a metal part and a plastic part (12) configured to be insulated from the motor block (20).

[0016] The following features can be considered individually or in combination:

[0017] The upper metal part (11) may be made of steel, preferably stainless steel.

[0018] The upper metal part (11) can be removably connected to the blade assembly (30) of the mixer.

[0019] The lower plastic part (12) may have a longitudinal opening that runs through the entire length of the body and a circular protrusion (14) that divides the axis into an upper part (121) and a lower part (122).

[0020] The lower part (121) may have a hollow column (1220) for accommodating and guiding the motor shaft (21).

[0021] The upper part (121) may have a housing (1210) for accommodating the nut (13).

[0022] Nut (13) can be screwed onto motor shaft (21).

[0023] The upper metal part (11) can be connected to the circular protrusion (14) of the lower plastic part (12).

[0024] The upper metal part (11) can be pressed onto the circular protrusion (14) of the lower plastic part (12).

[0025] Pins (141), preferably three pins, can connect the upper metal part (11) to the circular protrusion (14) of the lower plastic part (12). Attached Figure Description

[0026] Figure 1 An exploded perspective view of the components of the connector (10) is shown.

[0027] Figure 2 An exploded side view of the components of the connector (10) is shown.

[0028] Figure 3A A top view of the connector (10) is shown, and Figure 3B A cross-sectional view of the connector (10) along line AA is shown, showing the longitudinal axis (A).

[0029] Figure 4 An exploded perspective view of the motor block (20), the connector (10) and its components (11, 12, 13), and the knife assembly (30, not shown) inside the container (40) are shown.

[0030] Figure 5 The upper metal part (11) that engages with the blade assembly (30) in the assembled mixer is shown.

[0031] Figure 6 yes Figure 5 A sectional view.

[0032] Figure 7 The first step of the assembly process is shown.

[0033] Figure 8 The second step of the assembly process is shown.

[0034] Figure 9 The third step of the assembly process is shown.

[0035] Figure 10 The connector (10) obtained from the assembly process is shown. Detailed Implementation

[0036] Various modifications and / or improvements that are obvious to those skilled in the art can be made to the embodiments of the present invention described herein without departing from the scope of the present invention as defined by the claims.

[0037] The connector (10) for transmitting motion between the motor block (20) and the blade assembly (30) of the mixer includes an upper metal portion (11) for driving the blade assembly (30) and a lower plastic portion (12) to be connected to the motor shaft (21). The upper metal portion (11) is connected to the lower plastic portion (12). Figure 1 The components of the connector (10) are shown in an exploded perspective view, and Figure 2 The components of the connector (10) are shown in an exploded side view, and Figure 3A A top view of the connector (10) is shown. Figure 4 An exploded perspective view of the motor block (20), the connector (10) and its components (11, 12, 13), and the knife assembly (30, not shown) inside the container (40) is shown.

[0038] The upper metal part (11) is made of steel, preferably stainless steel. The upper metal part (11) is removably connected to the blade assembly (30) of the mixer.

[0039] The upper metal part (11) is connected to the tool assembly (30). Figure 4 The shape of the metal part (11) is shown to match the shape of the knife assembly (30).

[0040] like Figure 2 As shown, the lower plastic part (12) has a longitudinal opening that runs through the entire length of the body and a circular protrusion (14) that divides the axis into an upper part (121) and a lower part (122). Figure 3B The longitudinal axis (A) is shown.

[0041] The circular protrusion (14) has a means of connecting to the metal part (11). Any means known in the art can be used in this invention. In a preferred embodiment, the metal part (11) is pressed against the circular protrusion (14) of the plastic part (12). In another preferred embodiment, a pin (141) connects the metal part (11) to the circular protrusion (14) of the plastic part (12).

[0042] The upper part (121) has a housing (1210) for receiving a nut (13). The nut (13) is screwed to the motor shaft (21). Figure 1 The shape of the housing (1210) is shown to match the shape of the nut (13). Suitable shapes include, but are not limited to, square or hexagonal. Figure 6 As shown, the nut (13) is the component that will be connected to the motor shaft (21). The nut (13) is a threaded nut and may be a hollow nut or a cap nut.

[0043] The thread of the nut (13) rotates in the opposite direction to the rotation of the motor to prevent the connector (10) from loosening.

[0044] The lower plastic portion (12) has a longitudinal opening extending through the entire length of the body. The longitudinal axis is divided into two parts (upper part (121) and lower part (122)) by a circular protrusion (14). The lower part (122) has a hollow cylinder (1220) for housing and guiding the motor shaft (21), and the upper part (121) has a housing (1210) for housing the nut (13), such as Figure 6 As shown.

[0045] More specifically, the upper metal portion (11) is connected to the circular protrusion (14) of the lower plastic portion (12). The upper metal portion (11) is pressed against the circular protrusion (14) of the lower plastic portion (12).

[0046] The first step in the assembly process is as follows Figure 7 As shown, the upper metal part (11) has four pins (142) that align with four holes (143) in the lower plastic part (12). A nut (13) is positioned within the housing (1210) of the lower plastic part (12). Then, with the pins (142) and holes (143) aligned, the lower plastic part (12) is fitted into the upper metal part (11), thereby securing the nut (13) between the two parts.

[0047] Once the metal part (11) and the plastic part (12) are aligned, position the clamp (144) above the hole (143). Figure 8 The pin (142) is then lowered, thereby enlarging the hole in the pin (142) to lock the metal part (11) into the plastic part (12). In a preferred embodiment, both holes (143) are locked at once. Figure 8 and Figure 9 The holes (143) shown are opposite in diameter. Figure 9 The crimping of the two remaining holes (143) is shown. From Figure 9 As can be seen, the hole without the pin has a wider end and is already in the locked position. Figure 10 The final result of the assembly process of the connector (10) is shown, in which all four holes (143) have wider ends, thereby locking the metal part (11) into the plastic part (12).

[0048] The assembled structure can be used in any cooking appliance with a motor and blades, such as a blender. Preferably, such an appliance includes a base housing an electric motor and a blade assembly removably mounted on the base. The coupling (10) for transmitting motion of this invention is then placed between the motor block and the blade assembly (30).

Claims

1. A cooking appliance comprising a base housing an electric motor, a blade assembly removably mounted on the base, and a connector for transmitting motion between the motor block and the blade assembly, characterized in that, The connector includes: a) The upper metal portion, which is used to drive the blade assembly; b) The lower plastic part, which is connected to the motor shaft; The upper metal portion is connected to the lower plastic portion.

2. The cooking preparation utensil according to claim 1, characterized in that, The upper metal part is made of steel.

3. The cooking preparation utensil according to claim 1, characterized in that, The upper metal portion is removably connected to the blade assembly.

4. The cooking preparation utensil according to claim 1, characterized in that, The lower plastic portion has a longitudinal opening that extends through the entire length of the body and a circular protrusion that divides the axis into an upper and lower portion.

5. The cooking preparation utensil according to claim 4, characterized in that, The lower part has a hollow column for accommodating and guiding the motor shaft.

6. The cooking preparation utensil according to claim 4, characterized in that, The upper part has a housing for accommodating the nut.

7. The cooking preparation utensil according to claim 6, characterized in that, The nut is screwed onto the motor shaft.

8. The cooking preparation utensil according to claim 4, characterized in that, The upper metal portion is connected to the circular protrusion of the lower plastic portion.

9. The cooking preparation utensil according to claim 8, characterized in that, The upper metal portion is pressed against the circular protrusion of the lower plastic portion.

10. The cooking preparation utensil according to claim 8, characterized in that, The pin connects the upper metal portion to the circular protrusion of the lower plastic portion.

11. The cooking preparation utensil according to claim 2, characterized in that, The upper metal part is made of stainless steel.

12. The cooking preparation utensil according to claim 10, characterized in that, Three pins connect the upper metal portion to the circular protrusion of the lower plastic portion.

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