A mute gearbox and a juicer adopting the same

Abstract

The utility model discloses a mute gearbox and adopt the original juice machine of this gearbox, belong to the technical field of original juice machine, and its technical key points include the bottom cover and the box body of mutual cooperation, is provided with the input let -by -hole and the output let -by -hole respectively at the both ends of box body, is provided with the reduction gear assembly in the box body, reduction gear assembly input end is connected with the external motor output shaft, and the output end is connected with the power output shaft, and the box body periphery is wrapped with the sound insulation shell, and is provided with the let -by -hole of cooperation with power output shaft on the sound insulation shell, in the bottom cover, the box body and the sound insulation shell edge edge is along the periphery interval distribution with a plurality of first connecting hole, and fastening screw is sequentially passed through sound insulation shell, box body and bottom cover and is connected with fastening nut thread, the utility model aims at providing a mute gearbox and adopt the original juice machine of this gearbox of compact structure, the mute effect is good, is used for juicing.

Description

Technical Field

[0001] This utility model relates to a gearbox, and more specifically, to a silent gearbox for a juicer.

[0002] This utility model also relates to a juicer that uses this gearbox. Background Technology

[0003] Slow juicers evolved from conventional juicers, their main purpose being to turn fruit into juice to improve taste and convenience. However, slow juicers represent a significant leap forward from traditional cup blenders and juicers. As living standards continue to improve, consumers have higher demands for slow juicers. Currently, some slow juicers produce excessive motor noise during juicing, negatively impacting the user experience. Utility Model Content

[0004] The primary objective of this invention is to address the shortcomings of the prior art by providing a compact and quiet transmission. Another objective of this invention is to provide a juicer employing the aforementioned transmission.

[0005] The preceding technical solution of this utility model is implemented as follows: A silent gearbox includes a bottom cover and a housing that cooperate with each other. An input clearance hole and an output clearance hole are respectively provided at both ends of the housing. A reduction gear assembly is provided inside the housing. The input end of the reduction gear assembly is connected to the output shaft of an external motor, and the output end is connected to a power output shaft. The housing is surrounded by a soundproof shell, and a clearance hole that cooperates with the power output shaft is provided on the soundproof shell. A number of first connecting holes are distributed circumferentially at intervals along the edges of the bottom cover, housing, and soundproof shell. Fastening screws pass through the soundproof shell, housing, and bottom cover in sequence and are threadedly connected to fastening nuts.

[0006] In the aforementioned silent gearbox, a number of first connecting seats are distributed circumferentially along the edge of the bottom cover, and first connecting holes on the bottom cover are correspondingly provided on each of the first connecting seats. The first connecting holes are stepped holes that are smaller at the top and larger at the bottom.

[0007] The lower edge of the box has several second connecting seats distributed circumferentially. The first connecting holes on the box are correspondingly set on each of the second connecting seats. The first connecting holes are stepped holes that are larger at the top and smaller at the bottom.

[0008] The soundproof outer shell has several connecting posts distributed circumferentially along its edge. The first connecting holes on the soundproof outer shell are correspondingly set on each connecting post. The first connecting hole is columnar in shape and has a countersunk hole at the top that is adapted to a nut or bolt.

[0009] In the aforementioned silent gearbox, the lower end of the connecting column has an annular notch formed on its outer wall that corresponds to the first connecting hole on the gearbox body; during assembly, each annular notch is inserted into the first connecting hole of the gearbox body.

[0010] In the aforementioned silent gearbox, a spring washer is provided on the power output shaft between the housing and the sound insulation shell, and a positioning ring is connected to the power output shaft on the lower side of the spring washer via an annular groove.

[0011] In the aforementioned silent gearbox, a return spring is fitted on the power output shaft between the housing and the soundproof outer shell.

[0012] The reduction gear assembly includes a reduction bracket located on the last stage below the output clearance hole. The reduction bracket is provided with a cylindrical second connection hole that mates with the lower end of the power output shaft. The power output shaft passes through the output clearance hole and is movably connected to the polygonal second connection hole.

[0013] In the initial state, the power output shaft is in an extended state under the elastic force of the return spring. When the power output shaft is not aligned with the external screw shaft, the power output shaft compresses the return spring and is in a retracted state. When the external motor drives the power output shaft to rotate until it is correctly aligned with the external screw shaft, the elastic force of the return spring drives the power output shaft to extend and connect with the external screw shaft. The power output shaft is connected and linked with the second connecting hole during the movement.

[0014] In the aforementioned silent gearbox, the upper edge of the soundproof housing has several positioning notches distributed circumferentially to mate with the outer housing.

[0015] In the aforementioned silent gearbox, the final stage reduction bracket includes a turntable with several circumferentially distributed positioning holes on its edge, each corresponding to a gear shaft of the final stage gear assembly. A connecting ring is integrally formed on the top of the turntable, with a polygonal inner hole. The connecting ring and the turntable fit together in a single-sided open cylindrical shape. The power output shaft is movably inserted into the connecting ring. An oil-impregnated bearing is provided between the outer wall of the connecting ring and the interior of the gearbox housing.

[0016] In the aforementioned silent gearbox, the free end of the power output shaft is a connecting spline, which is frustum-shaped. A guide ball is integrally formed on the end face of the free end of the connecting spline, and the outer diameter of the guide ball is the same as the outer diameter of the free end of the connecting spline.

[0017] In the aforementioned silent gearbox, the housing is a cylindrical structure with a single open side; an outwardly protruding boss that mates with a connecting ring is integrally formed at the bottom of the housing; in the assembled state, the connecting ring is located inside the boss; and the return spring is sleeved around the boss.

[0018] The latter technical solution of this utility model is implemented as follows: A juicer using the above-mentioned gearbox includes a base and a cup body detachably connected to the base. A juicing head is provided in the cup body, and a motor is provided in the base. The output shaft of the motor is connected to the input end of the gearbox. A rotating shaft is fixed axially inside the juicing head. A regular polygonal third connecting hole is provided axially at the lower end of the rotating shaft. A connector that mates with the third connecting hole is formed at the upper end of the power output shaft. The rotating shaft and the power output shaft are detachably connected through the third connecting hole and the connector.

[0019] By adopting the above-described structure, this utility model effectively reduces the noise generated by the motor when it is operating by covering the outer casing with a soundproof shell, ensuring that the juicer does not produce excessive noise that would affect the user experience. Furthermore, the soundproof shell is integrated with the casing and bottom cover into a single unit, adding the soundproof shell without increasing the time required for assembly screws, resulting in a compact and ingenious assembly. Attached Figure Description

[0020] The present invention will be further described in detail below with reference to the embodiments shown in the accompanying drawings, but this does not constitute any limitation on the present invention.

[0021] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model;

[0022] Figure 2 This is a cross-sectional structural schematic diagram of Embodiment 1 of this utility model;

[0023] Figure 3 yes Figure 1 A schematic diagram of the decomposed structure;

[0024] Figure 4 This is a schematic diagram of the structure of the juicer of this utility model;

[0025] Figure 5 yes Figure 4 A schematic diagram of the cross-sectional structure;

[0026] Figure 6 yes Figure 5 A magnified view of a portion of point A in the middle;

[0027] Figure 7 This is a structural schematic diagram of Embodiment 2 of the present invention;

[0028] Figure 8 yes Figure 7 A magnified view of a portion of point B in the middle;

[0029] Figure 9 This is a cross-sectional structural diagram of Embodiment 2 of this utility model.

[0030] In the diagram: 1. Bottom cover; 1a. First connecting seat; 2. Housing; 2a. Second connecting seat; 2b. Boss; 3. Reduction gear assembly; 3a. Reduction bracket; 3b. Second connecting hole; 3c. Turntable; 3d. Positioning hole; 3e. Connecting ring; 4. Power output shaft; 4a. Connecting spline; 4b. Guide ball head; 5. Soundproof housing; 5a. Clearance hole; 5b. Connecting column; 5c. Annular notch; 5d. Positioning notch; 6. First connecting hole; 7. Spring washer; 8. Positioning ring; 9. Return spring; 10. Oil-impregnated bearing; 11. Base; 12. Cup body; 13. Juicing head; 14. Motor; 15. Rotating shaft; 15a. Third connecting hole. Detailed Implementation

[0031] Example 1

[0032] See Figures 1 to 3 As shown, a silent gearbox of this utility model includes a bottom cover 1 and a housing 2 that cooperate with each other. An input clearance hole and an output clearance hole are respectively provided at both ends of the housing 2. A reduction gear assembly 3 is provided inside the housing 2. The input end of the reduction gear assembly 3 is connected to the output shaft of an external motor, and the output end is connected to a power output shaft 4. The housing 2 is surrounded by a soundproof shell 5. A clearance hole 5a that cooperates with the power output shaft 4 is provided on the soundproof shell 5. A number of first connecting holes 6 are distributed circumferentially along the edges of the bottom cover 1, the housing 2, and the soundproof shell 5. Fastening screws pass through the soundproof shell 5, the housing 2, and the bottom cover 1 in sequence and are threadedly connected to the fastening nut.

[0033] Preferably, the bottom cover 1 has a plurality of first connecting seats 1a distributed circumferentially along its edge, and the first connecting holes 6 on the bottom cover 1 are respectively provided on each of the first connecting seats 1a. The first connecting holes 6 are stepped holes that are smaller at the top and larger at the bottom.

[0034] The lower edge of the housing 2 has several second connecting seats 2a distributed circumferentially. The first connecting holes 6 on the housing 2 are correspondingly provided on each of the second connecting seats 2a. The first connecting hole 6 is a stepped hole that is larger at the top and smaller at the bottom.

[0035] The soundproof shell 5 has several connecting posts 5b distributed circumferentially along its edge. The first connecting holes 6 on the soundproof shell 5 are correspondingly provided on each connecting post 5b. The first connecting hole 6 is columnar in shape and has a countersunk hole at the top that is adapted to a nut or bolt.

[0036] The use of a connecting column structure with the first connecting hole on it, the elongated hole structure can improve the installation stability of the entire soundproof shell. At the same time, the soundproof shell, the box body and the bottom cover are connected by the same screw and nut, making the installation simpler.

[0037] More preferably, to improve the stability of assembly, the lower end of the connecting column 5b is formed with an annular notch 5c that corresponds to the first connecting hole 6 on the housing 2; during assembly, each annular notch 5c is inserted into the first connecting hole 6 of the housing 2.

[0038] Preferably, in order to improve the stability of the power output shaft and prevent it from rising too much, a spring washer 7 is fitted on the power output shaft 4 between the housing 2 and the soundproof housing 5, and a positioning ring 8 is connected to the power output shaft 4 on the lower side of the spring washer 7 through an annular groove.

[0039] In this embodiment, a return spring 9 is sleeved on the power output shaft 4 between the housing 2 and the soundproof outer shell 5. To facilitate the positioning of the return spring, a spring washer is also sleeved on the power output shaft at the upper end of the return spring. Of course, if the spring washer is not added, the spring can also be positioned by directly pressing against the inner end face of the soundproof outer shell. The reduction gear assembly 3 includes a reduction bracket 3a located on the lower side of the output clearance hole. A second polygonal connecting hole 3b, which is cylindrical and cooperates with the lower end of the power output shaft 4, is provided on the reduction bracket 3a. The power output shaft 4 passes through the output clearance hole and is movably connected to the second polygonal connecting hole 3b.

[0040] Initially, the power output shaft 4 is extended under the force of the return spring 9. When the power output shaft 4 is not properly aligned with the external screw shaft, the power output shaft 4 compresses the return spring 9 and is in a retracted state. When the external motor drives the power output shaft 4 to rotate until it is correctly aligned with the external screw shaft, the force of the return spring 9 causes the power output shaft 4 to extend and connect with the external screw shaft. During movement, the power output shaft is continuously connected and linked with the second connecting hole 3b. This eliminates the need for manual adjustment during assembly, greatly simplifying the process.

[0041] More preferably, the upper edge of the soundproof outer shell 5 has several positioning notches 5d distributed circumferentially to mate with the outer shell. The positioning notches improve the stability of the assembly between the entire gearbox and the external juicer base.

[0042] In this embodiment, the final stage reduction bracket 3a includes a turntable 3c. Several positioning holes 3d, each corresponding to a gear shaft of the final stage gear assembly, are evenly distributed circumferentially along the edge of the turntable 3c. A connecting ring 3e is integrally formed on the top of the turntable 3c. The inner hole of the connecting ring 3e is polygonal, and the connecting ring 3e and the turntable 3c fit together to form a single-sided open cylindrical shape. The power output shaft 4 is movably inserted into the connecting ring 3e. The inner hole of the connecting ring is relatively deep, allowing the output shaft sufficient axial extension and retraction. The specific height of the inner hole of the connecting ring can be set according to specific needs, which is easily conceived by those skilled in the art.

[0043] Preferably, an oil-impregnated bearing 10 is disposed between the outer wall of the connecting ring 3e and the interior of the housing 2. By providing an oil-impregnated bearing, the stability of the output shaft can be further improved, preventing its radial oscillation. Of course, other bearings conventional in the art can also be used to replace the oil-impregnated bearing, as those skilled in the art will readily conceive of.

[0044] In this embodiment, the housing 2 has a cylindrical structure with one open side; a boss 2b is integrally formed at the bottom of the housing 2, protruding outward and cooperating with the connecting ring 3e; in the assembled state, the connecting ring 3e is located inside the boss 2b; the return spring 9 is sleeved around the boss 2b. This structure not only makes the power output shaft more stable, but also prevents the return spring from undergoing large displacement, resulting in better stability.

[0045] See Figures 4 to 6 As shown, this utility model discloses a juicer using the aforementioned gearbox, comprising a base 11 and a cup body 12 detachably connected to the base 11. A juicing head 13 is disposed within the cup body 12, and a motor 14 is disposed within the base 11. The output shaft of the motor 14 is connected to the input end of the gearbox. A rotating shaft 15 is axially fixed within the juicing head 13. A regular polygonal third connecting hole 15a is provided axially at the lower end of the rotating shaft 15. A connector that mates with the third connecting hole 15a is formed at the upper end of the power output shaft 4. The rotating shaft 15 and the power output shaft 4 are detachably connected through the third connecting hole 15a and the connector.

[0046] During use, if the connector at the upper end of the power output shaft is not properly aligned with the second connecting hole, the power output shaft retracts axially, thereby allowing the cup body and base to assemble properly and enabling the machine to start normally. After the motor is started, the power output shaft rotates. When it rotates to the correct alignment with the second connecting hole, it extends into the second connecting hole under the action of the return spring, completing the alignment and connection between the power output shaft and the rotating shaft, allowing the motor power to be transmitted normally to the juicing head.

[0047] Example 2

[0048] See Figures 7 to 9 As shown, the silent gearbox of this utility model has a structure that is basically the same as that of Embodiment 1, except that it does not have a return spring. Furthermore, the free end of the power output shaft 4 is a connecting spline 4a, which is frustum-shaped. A guide ball head 4b is integrally formed on the end face of the free end of the connecting spline 4a, and the outer diameter of the guide ball head 4b is the same as the outer diameter of the free end of the connecting spline 4a. A countersunk hole adapted to the connecting spline and the guide ball head is provided at the bottom of the mating screw shaft. During assembly, the guide ball head first enters the countersunk hole. With a slight manual pressure, and given the frustum-shaped structure at the upper end of the connecting spline, alignment can be achieved simply by slightly rotating the power output shaft or the screw.

[0049] The above-described embodiments are preferred embodiments of the present utility model and are only used to facilitate the illustration of the present utility model. They are not intended to limit the present utility model in any way. Any person skilled in the art who makes partial modifications or alterations to the technical content disclosed in the present utility model without departing from the scope of the technical features of the present utility model shall still fall within the scope of the technical features of the present utility model.

Claims

1. A mute gearbox, comprising a bottom cover (1) and a box body (2) matched with each other, an input accommodation hole and an output accommodation hole are arranged at both ends of the box body (2) respectively, and a reduction gear assembly (3) is arranged in the box body (2); an input end of the reduction gear assembly (3) is connected with an output shaft of an external motor, and a power output shaft (4) is connected with an output end of the reduction gear assembly (3), characterized in that, The housing (2) is surrounded by a soundproof shell (5), and a clearance hole (5a) is provided on the soundproof shell (5) to cooperate with the power output shaft (4); a number of first connection holes (6) are distributed circumferentially along the edges of the bottom cover (1), housing (2) and soundproof shell (5), and fastening screws pass through the soundproof shell (5), housing (2) and bottom cover (1) in sequence and are threadedly connected to the fastening nut.

2. A silent gearbox according to claim 1, characterized in that The bottom cover (1) has several first connecting seats (1a) spaced out along the circumferential direction. The first connecting holes (6) on the bottom cover (1) are correspondingly set on each first connecting seat (1a). The first connecting hole (6) is a stepped hole that is smaller at the top and larger at the bottom. The lower edge of the box (2) is provided with several second connecting seats (2a) distributed circumferentially. The first connecting holes (6) on the box (2) are provided on each second connecting seat (2a) in a corresponding manner. The first connecting hole (6) is a stepped hole that is larger at the top and smaller at the bottom. The soundproof shell (5) has several connecting posts (5b) distributed circumferentially along its edge. The first connecting hole (6) on the soundproof shell (5) is provided on each connecting post (5b) in a corresponding manner. The first connecting hole (6) is columnar in shape and has a countersunk hole at the top that is adapted to the nut or bolt.

3. A silencing gearbox according to claim 2, characterized in that The lower end of the connecting column (5b) is formed with an annular notch (5c) that corresponds to the first connecting hole (6) on the box (2); during assembly, each annular notch (5c) is inserted into the first connecting hole (6) of the box (2).

4. A silent gearbox according to claim 1, characterized in that A spring washer (7) is fitted on the power output shaft (4) between the housing (2) and the soundproof shell (5), and a positioning ring (8) is connected to the power output shaft (4) on the lower side of the spring washer (7) through an annular groove.

5. A silent gearbox according to claim 1, characterized in that A return spring (9) is fitted on the power output shaft (4) between the housing (2) and the soundproof shell (5); The reduction gear assembly (3) includes a reduction bracket (3a) located on the lower side of the output clearance hole. A second polygonal connecting hole (3b) in the shape of a cylinder and cooperating with the lower end of the power output shaft (4) is provided on the reduction bracket (3a). The power output shaft (4) passes through the output clearance hole and is movably connected to the second polygonal connecting hole (3b). In the initial state, the power output shaft (4) is in an extended state under the elastic force of the return spring (9). When the power output shaft (4) is not aligned with the external screw shaft, the power output shaft (4) squeezes the return spring (9) and is in a retracted state. When the external motor works and drives the power output shaft (4) to rotate to be correctly aligned with the external screw shaft, the elastic force of the return spring (9) drives the power output shaft (4) to extend and connect with the external screw shaft. The power output shaft is connected and linked with the second connecting hole (3b) during the movement.

6. A silent gearbox according to claim 1, characterized in that The upper edge of the soundproof shell (5) has several positioning notches (5d) that are circumferentially distributed to match the outer shell.

7. A silencing gearbox according to claim 5, characterized in that The last-stage reduction bracket (3a) includes a turntable (3c). Several positioning holes (3d) are evenly distributed along the circumferential edge of the turntable (3c), each corresponding to a gear shaft of the last-stage gear assembly. A connecting ring (3e) is integrally formed on the top of the turntable (3c). The inner hole of the connecting ring (3e) is polygonal. The connecting ring (3e) and the turntable (3c) fit together to form a single-sided open cylindrical shape. The power output shaft (4) is movably inserted into the connecting ring (3e). An oil-impregnated bearing (10) is provided between the outer wall of the connecting ring (3e) and the inside of the housing (2).

8. A silencing gearbox according to claim 7, characterised in that The free end of the power output shaft (4) is a connecting spline (4a), which is frustum shaped. A guide ball head (4b) is integrally formed on the end face of the free end of the connecting spline (4a), and the outer diameter of the guide ball head (4b) is the same as the outer diameter of the free end of the connecting spline (4a).

9. A silencing gearbox according to claim 7, characterized in that The box (2) has a cylindrical structure with one side open; a boss (2b) is integrally formed at the bottom of the box (2) that protrudes outward and cooperates with the connecting ring (3e); in the assembled state, the connecting ring (3e) is located inside the boss (2b); the return spring (9) is sleeved on the periphery of the boss (2b).

10. A juicer using the gearbox according to any one of claims 1-9, comprising a base (11) and a cup (12) detachably connected to the base (11), a juicing head (13) being arranged in the cup (12), and a motor (14) being arranged in the base (11), characterized in that, The output shaft of the motor (14) is connected to the input end of the gearbox; a rotating shaft (15) is fixed axially inside the juicing head (13), and a regular polygonal third connecting hole (15a) is provided at the lower end of the rotating shaft (15) axially. A connector that mates with the third connecting hole (15a) is formed at the upper end of the power output shaft (4). The rotating shaft (15) and the power output shaft (4) are detachably connected through the third connecting hole (15a) and the connector.

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