Motor waterproof structure of food material chopping machine
By installing a water-blocking ring and a flow guide on the rotor shaft, the problem of liquid leakage from food ingredients was solved, the motor was effectively waterproofed, and the service life of the chopper was extended.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG QIANJIAHUI ELECTRICAL EQUIP CO LTD
- Filing Date
- 2025-05-19
- Publication Date
- 2026-05-15
AI Technical Summary
When the sealing structure of the motor in an existing food chopper ages, liquid food is prone to leaking, which can lead to motor corrosion or damage and affect its lifespan.
A water-blocking ring is fitted onto the rotor shaft to form a seal between the water-blocking ring and the oil seal. The centrifugal force of the water-blocking ring prevents liquid food from entering the upper cover of the motor. Combined with a flow guide, the liquid flow is further blocked.
It effectively prevents liquid food from entering the motor, extends the motor's lifespan, enhances the motor's waterproof capabilities, and improves the overall durability of the chopper.
Smart Images
Figure CN224249484U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of mechanical technology and relates to a food chopper, and more particularly to a waterproof structure for the motor of a food chopper. Background Technology
[0002] A food chopper is a kitchen tool used to quickly chop, blend, or mix ingredients, improving food preparation efficiency.
[0003] An existing shredder structure, such as the novel shredder disclosed in the Chinese Patent Database (application number: 201820175845.8), includes a base, a mixing tank, mixing blades, and a lid. A drive motor is installed inside the base, connected to a transmission shaft. The transmission shaft extends from the top of the base and engages with a mixing blade holder inside the mixing tank. The mixing blade holder has mixing blades. The key feature is that the top of the base has a circular hollow column with two L-shaped locking grooves on its surface, the tops of which are flush with the top of the hollow column. The lower part of the outer wall of the mixing tank has two locking blocks that match the locking grooves. A locking element is provided on each side of the upper part of the mixing tank wall. The edge of the lid has a fitting element that engages with the locking elements to lock the lid in place. The lid also has a feed inlet connected to a sealing cap. The mixing tank wall also has an elastic top element, and the edge of the lid has a fitting element that allows the lid to separate from the mixing tank under the action of the elastic top element.
[0004] In the aforementioned shredder, the drive motor is housed within the machine base, and the transmission shaft connected to the drive motor extends out of the machine base, with an oil seal forming a seal between the two. When the oil seal ages over time, liquid food leaks downwards and flows to the motor. If the motor is a closed type, the liquid food will come into contact with the sealing ring at the motor end cover, corroding it and affecting the motor's lifespan; if the motor has an open structure, the liquid food will directly damage the motor. Utility Model Content
[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a waterproof structure for the motor of a food chopper that enhances the motor's waterproof capability.
[0006] The purpose of this utility model can be achieved through the following technical solution: a waterproof structure for the motor of a food chopper, the food chopper including a base with an inner cavity and a motor vertically installed in the base, the motor including an upper end cover and a rotor shaft, the base having a vertically penetrating through hole, and the upper end of the rotor shaft passing through the center hole of the upper end cover and the through hole in sequence, the waterproof structure including an oil seal installed in the through hole, and the rotor shaft forming a seal with the inner wall of the through hole through the oil seal, characterized in that a water-blocking ring is sleeved and fixed on the rotor shaft, the water-blocking ring being between the oil seal and the upper end cover, and the water-blocking ring not contacting the upper end cover; the inner side wall of the water-blocking ring is in close contact with the outer wall of the rotor shaft to form a seal, and the outer diameter of the water-blocking ring is larger than the diameter of the center hole of the upper end cover.
[0007] During use, when the oil seal ages and leaks, the liquid from the food flows down through the oil seal and is blocked by the water-blocking ring. As the water-blocking ring rotates at high speed, it throws the liquid from the food attached to it outward, thus effectively preventing the liquid from entering the center hole of the upper cover and providing better protection for the motor.
[0008] A water-blocking ring is fixed on the rotor shaft to form a shield above the center hole of the upper end cover. The centrifugal force generated by the high-speed rotation of the water-blocking ring can effectively prevent liquid from the food from flowing towards the center hole of the upper end cover, thus achieving a better waterproof effect, enhancing the waterproof capability of the motor, and extending the life of the chopper.
[0009] In the aforementioned waterproof structure of the food chopper's motor, the water-blocking ring is positioned close to the upper end cover to reduce the gap between them, thereby improving the water-blocking effect of the water-blocking ring without affecting its rotation.
[0010] In the aforementioned waterproof structure of the motor of the food chopper, the outer wall of the rotor shaft has a horizontally arranged, annular shoulder surface, and the lower end of the water-retaining ring is pressed against the shoulder surface. The shoulder surface serves both to limit the installation of the water-retaining ring and to extend the sealing path formed between the rotor shaft and the water-retaining ring, thereby further improving the water-retaining effect of the water-retaining ring.
[0011] In the aforementioned waterproof structure of the food chopper motor, the water-retaining ring includes a sleeve fitted around the rotor shaft and a ring-shaped water-retaining part formed on the outer wall of the sleeve. The bottom wall of the sleeve is pressed against the aforementioned shaft shoulder surface, and the axial length of the sleeve is greater than the axial length of the water-retaining part. This design effectively increases the contact area between the water-retaining ring and the rotor shaft, thereby enhancing both the positioning stability and waterproofing effect of the water-retaining ring.
[0012] In the aforementioned waterproof structure of the food chopper's motor, the top wall of the water-blocking part is a cone, and the diameter of the cone gradually increases from top to bottom. The cone shape increases the difficulty for liquid food to adhere to the top wall of the water-blocking part, making it easier for the liquid food to be ejected.
[0013] In the aforementioned waterproof structure of the food chopper's motor, the outer edge of the water-retaining part extends downward to form a blocking part, which is annular and coaxial with the water-retaining ring. The blocking part further prevents liquid food from moving towards the rotor shaft.
[0014] In the aforementioned waterproof structure of the motor of the food chopper, a guide hood is fitted and fixed on the upper cover to cover the upper cover. The guide hood is an inverted basin-shaped structure, and both the top and bottom of the guide hood are open. The top opening of the guide hood is located directly below the water baffle ring, and the downward projection of the water baffle ring can completely cover the top opening of the guide hood.
[0015] In actual products, the fairing is mainly for open-type motors; if the motor adopts a closed structure, there is no need to install an additional fairing.
[0016] In the aforementioned waterproof structure of the food chopper's motor, the top cover has multiple vertically arranged bolt holes, and the top wall of the flow guide has openings that expose these bolt holes. The number of openings and bolt holes are the same, and their positions correspond one-to-one. The top wall of the flow guide also has vertically formed baffles on the side of each opening closest to the rotor shaft, and these baffles are used to prevent liquid from flowing into the corresponding opening. During installation, the motor is fixed to the base using bolts and bolts. This reduces the bolt length in the actual design, making the motor installation more stable.
[0017] In the aforementioned waterproof structure for the motor of the food chopper, the top surface of the flow guide is a horizontally oriented plane, and the opening is located at the edge of the plane. This design further prevents liquid from entering the opening, allowing the flow guide to better perform its water-blocking function.
[0018] In the aforementioned waterproof structure of the motor of the food chopper, the lower end of the flow guide covers presses against the upper end cover; the side of the stop block facing away from the rotor shaft has a vertically penetrating slot, and the upper end cover has a locking block that matches the slot, and the locking block is locked in the corresponding slot to stably position the flow guide cover, effectively facilitating the installation of the flow guide cover.
[0019] Compared with existing technologies, the waterproof motor structure of this food chopper has the following advantages:
[0020] 1. Fix a water-blocking ring on the rotor shaft to form a shield above the center hole of the upper end cover. Under the centrifugal force generated by the high-speed rotation of the water-blocking ring, the liquid of the food can be effectively prevented from flowing towards the center hole of the upper end cover, so as to achieve a better waterproof effect, enhance the waterproof capability of the motor, and extend the life of the chopper.
[0021] 2. The top surface of the flow guide is flat, and the side surface of the flow guide has a convex spherical surface. The number of spherical surfaces is the same as the number of heat dissipation vents, and each heat dissipation vent is covered by the corresponding spherical surface. The upper side of the spherical surface extends to connect with the top surface of the flow guide. This can quickly drain the liquid that remains on the flow guide and further prevent liquid from entering the opening, so that the flow guide can better perform its water blocking effect. Attached Figure Description
[0022] Figure 1 This is a 3D schematic diagram of the food chopper.
[0023] Figure 2 This is a cross-sectional view of the food chopper.
[0024] Figure 3 yes Figure 2 Enlarged diagram of point A in the middle.
[0025] Figure 4 This is a schematic diagram showing the connection between the motor and the fairing.
[0026] Figure 5 This is a schematic diagram of the fairing structure.
[0027] In the diagram, 1 is the base; 1a is the air vent; 2 is the motor; 2a is the upper cover; 2b is the rotor shaft; 2c is the shaft shoulder; 2d is the bolt hole; 2e is the retaining block; 3 is the oil seal; 4 is the water baffle ring; 4a is the sleeve; 4b is the water baffle part; 4c is the blocking part; 5 is the flow guide; 5a is the opening; 5b is the stop block; 5c is the plane; and 5d is the slot. Detailed Implementation
[0028] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.
[0029] Example 1: As Figure 1 and Figure 2 As shown, in the waterproof structure of the motor of this food chopper, the food chopper includes a base 1 with an inner cavity and a motor 2 vertically installed in the base 1.
[0030] in,
[0031] Multiple air holes 1a are vertically opened on the bottom wall of the inner cavity of the base 1.
[0032] The motor 2 is an existing product, including an upper end cover 2a and a rotor shaft 2b, and the upper end cover 2a has a central hole coaxial with the rotor shaft 2b. The base 1 has a vertical through hole through which the upper end of the rotor shaft 2b extends out of the inner cavity, and the upper end of the rotor shaft 2b passes through the central hole and the through hole of the upper end cover 2a in sequence.
[0033] like Figures 2 to 4As shown, the waterproof structure of this food chopper includes an oil seal 3 installed in the through hole, and the rotor shaft 2b forms a seal with the inner wall of the through hole through the oil seal 3. At this time, the inner and outer walls of the oil seal 3 are in contact with the outer wall of the rotor shaft 2b and the inner wall of the through hole, respectively, and are sealed. A water-blocking ring 4 is sleeved and fixed on the rotor shaft 2b. The water-blocking ring 4 is located between the oil seal 3 and the upper end cover 2a, and the water-blocking ring 4 is not in contact with the upper end cover 2a. The inner wall of the water-blocking ring 4 is in close contact with the outer wall of the rotor shaft 2b to form a seal, and the outer diameter of the water-blocking ring 4 is larger than the diameter of the central hole of the upper end cover 2a. At this time, the downward projection of the water-blocking ring 4 completely covers the central hole of the upper end cover 2a.
[0034] During use, when the oil seal 3 ages and leaks, the liquid food flows down through the oil seal 3 and is blocked by the water-blocking ring 4. As the water-blocking ring 4 rotates at high speed, the liquid food attached to it is thrown outward, thereby effectively preventing the liquid food from entering the center hole of the upper cover 2a, thus providing better protection for the motor 2.
[0035] A water-blocking ring 4 is fixed on the rotor shaft 2b to form a shield above the center hole of the upper end cover 2a. Under the centrifugal force generated by the high-speed rotation of the water-blocking ring 4, the liquid of the food can be effectively prevented from flowing towards the center hole of the upper end cover 2a, so as to achieve a better waterproof effect, enhance the waterproof capability of the motor 2, and extend the life of the chopper.
[0036] The water-blocking ring 4 is preferably positioned close to the upper end cover 2a to reduce the gap between them, thereby improving the water-blocking effect of the water-blocking ring 4 without affecting its rotation.
[0037] In this embodiment,
[0038] The water-retaining ring 4 is fixed to the rotor shaft 2b only through a tight fit. Further, the outer wall of the rotor shaft 2b has a horizontally arranged, annular shoulder surface 2c. The shoulder surface 2c and the rotor shaft 2b are coaxially arranged, and the lower end of the water-retaining ring 4 is pressed against the shoulder surface 2c. The shoulder surface 2c serves both to limit the installation of the water-retaining ring 4, ensuring it is pressed into place in one go, and to extend the sealing path formed between the rotor shaft 2b and the water-retaining ring 4, thereby further improving the water-retaining effect of the water-retaining ring 4.
[0039] like Figure 3 and Figure 4As shown, the specific structure of the water-blocking ring 4 is as follows: The water-blocking ring 4 is an integral structure, comprising a sleeve 4a fitted over the rotor shaft 2b and a ring-shaped water-blocking portion 4b formed on the outer wall of the sleeve 4a. The sleeve 4a is fitted and fixed onto the rotor shaft 2b, with its inner wall in close contact with the outer wall of the rotor shaft 2b, and its bottom wall pressed against the aforementioned shoulder surface 2c. The outer diameter of the water-blocking portion 4b is larger than the diameter of the central hole of the upper end cap 2a, and the axial length of the sleeve 4a is greater than the axial length of the water-blocking portion 4b. This design effectively increases the contact area between the water-blocking ring 4 and the rotor shaft 2b, thereby simultaneously enhancing the positioning stability and waterproofing effect of the water-blocking ring 4.
[0040] To further explain, the top wall of the water-retaining part 4b is a conical surface, and the diameter of the conical surface gradually increases from top to bottom. The conical surface design increases the difficulty for liquid food to adhere to the top wall of the water-retaining part 4b, making it easier for the liquid food to be ejected. The outer edge of the water-retaining part 4b extends downward to form a blocking part 4c, which is annular and coaxial with the water-retaining ring 4. The blocking part 4c further prevents liquid food from moving towards the rotor shaft 2b.
[0041] In the actual product, a ring of ribs is formed on the bottom wall of the water-blocking part 4b, with the two ends of the ribs extending to the blocking part 4c and the sleeve 4a respectively, so as to effectively enhance the overall strength of the water-blocking ring 4.
[0042] Example 2: The structure and principle of Example 2 are basically the same as those of Example 1, except that: Figures 2 to 5 As shown, a flow guide 5 is fitted over and fixed to the upper end cover 2a, covering the upper end cover 2a, and the shape and size of the flow guide 5 match those of the upper end cover 2a. The flow guide 5 is an inverted basin-shaped structure, with open tops and bottoms. The top opening of the flow guide 5 is directly below the water-retaining ring 4, and the downward projection of the water-retaining ring 4 completely covers the top opening of the flow guide 5. Preferably, the flow guide 5 and the upper end cover 2a are coaxially arranged.
[0043] In actual products, the deflector 5 is mainly for open-type motors 2; if the motor 2 adopts a closed structure, there is no need to set up the deflector 5.
[0044] like Figure 4 and Figure 5 As shown, the top of the upper cover 2a has multiple vertically arranged bolt holes 2d. The top wall of the flow guide shroud 5 has openings 5a that expose the bolt holes 2d. The number of openings 5a and bolt holes 2d are the same and their positions correspond one-to-one. The top wall of the flow guide shroud 5 also has vertically formed baffles 5b on the side of each opening 5a near the rotor shaft 2b. The baffles 5b are used to block the liquid from flowing to the corresponding opening 5a. During installation, the motor 2 is fixed in the base 1 by bolts through the bolt holes 2d and bolts. This reduces the bolt length in the actual design and makes the installation of the motor 2 more stable.
[0045] To further explain, the top surface of the flow deflector 5 is a horizontally oriented plane 5c, and the opening 5a is located at the edge of the plane 5c. This design further prevents liquid from entering the opening 5a, allowing the flow deflector 5 to better perform its water-blocking function.
[0046] In this embodiment, the flow guide 5 is fixed as follows: the lower end of the flow guide 5 is pressed onto the upper end cover 2a; the side of the stop block 5b facing away from the rotor shaft 2b has a vertically penetrating groove 5d, and the upper end cover 2a has a locking block 2e that matches the groove 5d, and the locking block 2e is locked in the corresponding groove 5d to stably position the flow guide 5 and effectively facilitate the installation of the flow guide 5. Preferably, the groove 5d is an arc shape coaxial with the upper end cover 2a, and the locking block 2e is also arc-shaped, so as to enhance the positioning strength and stability of the flow guide 5 by increasing the contact area between the groove 5d and the locking block 2e.
[0047] In the actual product, the bottom wall of the deflector 5 extends to near the bottom wall of the upper cover 2a to enhance its waterproof effect.
[0048] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.
Claims
1. A waterproof structure for the motor of a food chopper, the food chopper comprising a base (1) having an inner cavity and a motor (2) vertically disposed within the base (1), the motor (2) comprising an upper end cover (2a) and a rotor shaft (2b), the base (1) having a vertically penetrating through hole, and the upper end of the rotor shaft (2b) passing sequentially through the center hole of the upper end cover (2a) and the through hole, the waterproof structure comprising an oil seal (3) disposed within the through hole, and the rotor shaft (2b) forming a seal with the inner wall of the through hole through the oil seal (3), characterized in that, A water-blocking ring (4) is fitted and fixed on the rotor shaft (2b). The water-blocking ring (4) is located between the oil seal (3) and the upper end cover (2a), and the water-blocking ring (4) does not contact the upper end cover (2a). The inner wall of the water-blocking ring (4) is in close contact with the outer wall of the rotor shaft (2b) to form a seal, and the outer diameter of the water-blocking ring (4) is larger than the diameter of the central hole of the upper end cover (2a).
2. The waterproof motor structure of the food chopper according to claim 1, characterized in that, The aforementioned water-retaining ring (4) is positioned near the upper end cover (2a).
3. The waterproof structure of the motor in the food chopper according to claim 1 or 2, characterized in that, The outer wall of the rotor shaft (2b) has a horizontally arranged and annular shoulder surface (2c), and the lower end of the water baffle ring (4) is pressed against the shoulder surface (2c).
4. The waterproof structure of the motor in the food chopper according to claim 3, characterized in that, The water-blocking ring (4) includes a sleeve (4a) fitted outside the rotor shaft (2b) and a water-blocking part (4b) formed on the outer wall of the sleeve (4a) in an annular shape. The bottom wall of the sleeve (4a) is pressed against the aforementioned shaft shoulder surface (2c). The axial length of the sleeve (4a) is greater than the axial length of the water-blocking part (4b).
5. The waterproof structure of the motor in the food chopper according to claim 4, characterized in that, The top wall of the water-blocking part (4b) is a cone, and the diameter of the cone gradually increases from top to bottom.
6. The waterproof structure of the motor in the food chopper according to claim 5, characterized in that, The outer edge of the water-blocking part (4b) extends downward to form a blocking part (4c), which is a ring coaxial with the water-blocking ring (4).
7. The waterproof motor structure of the food chopper according to claim 1, characterized in that, The upper end cover (2a) is covered and fixed with a flow guide (5) that covers the upper end cover (2a). The flow guide (5) is an inverted basin-shaped structure, and the top and bottom of the flow guide (5) are open. The top opening of the flow guide (5) is directly below the water baffle ring (4), and the downward projection of the water baffle ring (4) can completely cover the top opening of the flow guide (5).
8. The waterproof structure of the motor in the food chopper according to claim 7, characterized in that, The top of the upper cover (2a) has a number of vertically arranged bolt holes (2d), and the top wall of the flow guide (5) has an opening (5a) that exposes the bolt holes (2d). The number of openings (5a) and bolt holes (2d) are the same and their positions correspond one-to-one. The top wall of the flow guide (5) also has a vertically formed baffle (5b) on the side of each opening (5a) near the rotor shaft (2b), and the baffle (5b) is used to block the liquid from flowing to the corresponding opening (5a).
9. The waterproof structure of the motor in the food chopper according to claim 8, characterized in that, The top surface of the fairing (5) is a horizontally set plane (5c), and the opening (5a) is set at the edge of the plane (5c).
10. The waterproof structure of the motor in the food chopper according to claim 8 or 9, characterized in that, The lower end of the shroud (5) presses against the upper end cover (2a); the side of the stop block (5b) facing away from the rotor shaft (2b) has a vertical through groove (5d), and the upper end cover (2a) has a locking block (2e) that matches the groove (5d), and the locking block (2e) is locked in the corresponding groove (5d).