阅读说明：本技术 一种双联锥行星齿轮传动机构及应用该机构的手持式搅拌机 (Duplex cone planetary gear transmission mechanism and handheld stirrer applying same ) 是由 金学士 于 2020-08-18 设计创作，主要内容包括：本发明涉及一种双联锥行星齿轮传动机构及应用该机构的手持式搅拌机,包括主动锥齿轮,由电机直接或间接驱动；内锥齿轮,呈不可转动地固定设置；锥行星齿轮支架,可旋转地安装在内锥齿轮内；双联锥行星齿轮,具有至少两个,沿圆周间隔均匀地安装在锥行星齿轮支架上,各双联锥行星齿轮的上联锥齿轮与主动锥齿轮啮合,下联锥齿轮与内锥齿轮啮合；其中一个双联锥行星齿轮是作为供搅拌附件连接的输出齿轮,该作为输出齿轮的双联锥行星齿轮其轴线与主动锥齿轮的轴线之间形成的轴交角α为锐角。本发明结构紧凑、传动比大、附件转速低、振动小,食物搅拌过程中做三维搅拌,因此不需用手工移动调整搅拌效果,搅拌质量好,并且操作轻松舒适,安全性好。(The invention relates to a duplex bevel planetary gear transmission mechanism and a handheld stirrer applying the same, wherein the duplex bevel planetary gear transmission mechanism comprises a driving bevel gear which is directly or indirectly driven by a motor; the inner bevel gear is fixedly arranged in a non-rotatable manner; the bevel planet gear bracket is rotatably arranged in the inner bevel gear; the duplex bevel planet gears are at least two and are uniformly arranged on the bevel planet gear bracket at intervals along the circumference, the upper bevel gear of each duplex bevel planet gear is meshed with the driving bevel gear, and the lower bevel gear of each duplex bevel planet gear is meshed with the inner bevel gear; one of the duplex bevel planetary gears is used as an output gear for connecting a stirring accessory, and an axial angle alpha formed between the axis of the duplex bevel planetary gear used as the output gear and the axis of the driving bevel gear is an acute angle. The three-dimensional stirring machine has the advantages of compact structure, large transmission ratio, low accessory rotating speed and small vibration, and can be used for three-dimensional stirring in the food stirring process, so that the stirring effect does not need to be adjusted by manual movement, the stirring quality is good, the operation is easy and comfortable, and the safety is good.)

1. The utility model provides a pair awl planetary gear drive which characterized in that: comprises that

The driving bevel gear is directly or indirectly driven by a motor;

the inner bevel gear is fixedly arranged in a non-rotatable manner;

the bevel planet gear bracket is rotatably arranged in the inner bevel gear;

the duplex bevel planet gears are at least two and are uniformly arranged on the bevel planet gear bracket at intervals along the circumference, the upper bevel gear of each duplex bevel planet gear is meshed with the driving bevel gear, and the lower bevel gear of each duplex bevel planet gear is meshed with the inner bevel gear; one of the double bevel planetary gears is used as an output gear for connecting a stirring accessory, and an intersecting axis angle alpha formed between the axis of the double bevel planetary gear used as the output gear and the axis of the driving bevel gear is an acute angle.

2. The double-cone planetary gear transmission as in claim 1, wherein: the drive bevel gear and the motor are indirectly driven through a transmission assembly, the transmission assembly adopts a planetary gear mechanism, and the transmission assembly comprises:

the sun gear is fixed on an output shaft of the motor;

the inner straight gear is fixedly arranged in a non-rotatable manner;

the straight planetary gear bracket is rotatably arranged in the inner straight gear;

a plurality of straight planetary gears, each of which is uniformly installed on the straight planetary gear bracket along the circumference at intervals; the straight planetary gear adopts a duplex straight planetary gear or a simplex straight planetary gear, when the duplex straight planetary gear is adopted, an upper straight gear of each duplex straight planetary gear is meshed with the sun gear, and a lower straight gear is meshed with the inner straight gear; when the single-connection straight planetary gear is adopted, each single-connection straight planetary gear is meshed with the sun gear and the inner straight gear simultaneously;

the driving bevel gear is arranged on the straight planetary gear bracket and rotates synchronously with the straight planetary gear bracket.

3. The double-cone planetary gear transmission as in claim 2, wherein: the straight planetary gear bracket is composed of an upper bracket and a lower bracket, and the sun gear and each straight planetary gear are clamped between the upper bracket and the lower bracket; the driving bevel gear and the lower bracket are of an integrated structure and are arranged at the bottom of the lower bracket.

4. The double-cone planetary gear transmission as in claim 3, wherein: the bottom of the lower bracket is also provided with a shoulder surface for controlling the axial movement of the double-linked bevel gear.

5. The double-cone planetary gear transmission as in claim 2, wherein: the inner straight gear and the inner bevel gear are connected into a whole up and down.

6. The double-cone planetary gear transmission according to any one of claims 1 to 5, wherein: the angle range of the intersection angle alpha is 8-35 degrees.

7. The double-cone planetary gear transmission according to claim 6, wherein: and an iron ring for bearing supporting is arranged between the conical planetary gear bracket and the inner conical gear.

8. A hand-held mixer, includes casing and stirring annex, its characterized in that: the double-cone planetary gear transmission mechanism of any one of claims 1 to 7 is further included, the double-cone planetary gear transmission mechanism is arranged in a machine shell, and the inner cone gear is fixedly arranged with the machine shell; the stirring accessory is detachably connected to a duplex bevel planetary gear serving as an output gear, and the stirring accessory is enabled to rotate in a three-dimensional planetary mode through the combined action of the duplex bevel planetary gear and the bevel planetary gear support.

9. The hand-held blender as recited in claim 8, wherein: the duplex bevel planetary gear as the output gear is also provided with a connecting shaft part which is used for connecting the stirring accessories and extends downwards in the axial direction, a stirring accessory jack is arranged in the connecting shaft part, and the jack is a blind hole.

10. The hand-held blender as recited in claim 9, wherein: the excircle of the end part of the connecting shaft part is provided with an annular clamping groove, and a spring for quickly assembling and disassembling the stirring accessory is arranged in the clamping groove.

Technical Field

The invention relates to a transmission mechanism, in particular to a speed reduction transmission mechanism with a large transmission ratio and a handheld stirrer applying the transmission mechanism.

Background

At present, various small household food processing appliances are increasingly entering daily lives of common people due to the convenience of use, and the handheld mixer is a very widely applied appliance.

Generally, a hand-held blender comprises a blending accessory (such as an egg-breaking cage, a dough hook, a blending stick and the like) for blending and crushing food, and a driving device for driving the accessory, wherein a driving motor in the driving device drives the blending accessory through a transmission mechanism, so that the accessory rotates to blend and crush the food.

However, in the conventional hand-held blender, the transmission mechanism adopted by the conventional hand-held blender has a common property whether the planetary gear support rotates as the output end or the dead axle gear rotates as the output end (i.e. the blending component rotates in a dead axle manner), and the transmission mechanism can only drive the accessory to rapidly rotate in a plane range, i.e. the accessory has a two-dimensional motion track, so that food is blended in the plane range, and the blending effect and the blending efficiency are relatively low.

Therefore, in view of the above-mentioned situation, the present applicant applied in the earlier "a transmission mechanism (publication No. CN206746430U) capable of realizing three-dimensional stirring" effectively solves the technical problem, in which an output spindle of the transmission mechanism drives a stirring shaft to rotate through a bevel planetary gear set, an intersecting axis angle formed between an axis of the stirring shaft and an axis of the output spindle is an acute angle, so that the stirring shaft is driven by the bevel planetary gear to rotate (self-rotate) on a conical surface generatrix, the stirring shaft rotates (revolve) along with a plane of a bevel planetary gear support, and the stirring accessory forms a three-dimensional motion track along with the oblique rotation and the revolution in the plane. Therefore, the transmission mechanism can realize three-dimensional stirring, and can only stir in a plane range compared with the traditional stirring accessory, so that the stirring effect and the efficiency are greatly improved.

However, if the rotational speed of the accessory is low, the hand-held blender is comfortable for the user to operate and has good safety. The transmission mechanism is limited in speed reduction ratio due to the structural limitation, if the transmission ratio is increased, the number of teeth of the internal bevel gear and the bevel planet gear is increased, and therefore under the condition that the strength of the gear is ensured, the radial size of the gear is increased, the size is increased, and the trend requirements of miniaturization, portability and individuation of handheld food appliances are not met.

Therefore, the transmission mechanism used in the hand-held blender can be further improved.

Disclosure of Invention

The first technical problem to be solved by the invention is to provide a duplex bevel planetary gear transmission mechanism which has a compact structure and can realize an ultra-large transmission ratio aiming at the current situation of the prior art, and the transmission mechanism can realize three-dimensional stirring and simultaneously can reduce the stirring rotating speed of accessories and reduce the vibration of products.

The second technical problem to be solved by the invention is to provide a hand-held mixer with the transmission mechanism, which is easy and comfortable to operate and has good safety.

The technical scheme adopted by the invention for solving the first technical problem is as follows: this duplex awl planetary gear drive mechanism, characterized by includes: the driving bevel gear is directly or indirectly driven by a motor; the inner bevel gear is fixedly arranged in a non-rotatable manner; the bevel planet gear bracket is rotatably arranged in the inner bevel gear; the duplex bevel planet gears are at least two and are uniformly arranged on the bevel planet gear bracket at intervals along the circumference, the upper bevel gear of each duplex bevel planet gear is meshed with the driving bevel gear, and the lower bevel gear of each duplex bevel planet gear is meshed with the inner bevel gear; one of the double bevel planetary gears is used as an output gear for connecting a stirring accessory, and an intersecting axis angle alpha formed between the axis of the double bevel planetary gear used as the output gear and the axis of the driving bevel gear is an acute angle.

If the number of teeth of the drive bevel gear is Z1, the number of teeth of the upper bevel gear of the double bevel planetary gear is Z2, the number of teeth of the lower bevel gear is Z3, and the number of teeth of the inner bevel gear is Z4, the transmission ratio of the double bevel planetary gear mechanism is i ═ 1+ (Z2 × Z4)/(Z1 × Z3), as shown in fig. 8; the single bevel planetary gear has a gear ratio i of 1+ Z4/Z1 (the number of teeth of the drive bevel gear is Z1, the number of teeth of the bevel planetary gear is Z2, and the number of teeth of the inner bevel gear is Z4), as shown in fig. 7. Therefore, as can be seen from the gear ratio calculation formula, the change of the tooth numbers Z2 and Z3 of the double cone planetary gears can change the gear ratio in a large range, so that the gear ratio of the mechanism is large, but the radial dimension is small.

The angle range of the intersection angle of the shafts can be selected from 8-35 degrees, the angle range can ensure that the stirring accessory can stir in a proper space range, the stirring amplitude is moderate, and the stirring effect is good.

An iron ring is arranged between the bevel planet gear support and the inner bevel gear and is used as a bearing of the bevel planet gear support, so that the bevel planet gear support can rotate around the axis of the bevel planet gear support in a plane.

Preferably, the drive bevel gear is indirectly driven by a motor, and the motor is in transmission connection with the drive bevel gear through a transmission assembly. Thus, the transmission mechanism of the invention forms two-stage transmission, the transmission component is the first-stage transmission, and the transmission component can adopt a duplex or simplex direct planetary gear mechanism, and specifically comprises: the sun gear is fixed on an output shaft of the motor; the inner straight gear is fixedly arranged in a non-rotatable manner; the straight planetary gear bracket is rotatably arranged in the inner straight gear; a plurality of straight planetary gears, each of which is uniformly installed on the straight planetary gear bracket along the circumference at intervals; when the straight planetary gear adopts a duplex straight planetary gear, an upper duplex straight gear of each duplex straight planetary gear is meshed with the sun gear, and a lower duplex straight gear is meshed with the inner straight gear; when the straight planetary gear adopts the single-connection straight planetary gear, each single-connection straight planetary gear is meshed with the sun gear and the inner straight gear simultaneously; the driving bevel gear is arranged on the straight planetary gear bracket and rotates synchronously with the straight planetary gear bracket, and then the driving bevel gear drives the second-stage duplex bevel planetary gear mechanism.

The straight planetary gear bracket can be formed by combining an upper bracket and a lower bracket, and the sun gear and each straight planetary gear are clamped between the upper bracket and the lower bracket and can be placed into the inner straight gear as an integral module; the driving bevel gear and the lower bracket are of an integrated structure and are formed at the bottom of the lower bracket. Therefore, the lower support of the first-stage output end and the driving bevel gear of the second-stage input end are integrated, so that the structure is very compact.

And in order to control the axial movement of each duplex bevel gear, the bottom of the lower bracket is also provided with a shoulder surface.

Preferably, the inner spur gear and the inner bevel gear are connected up and down into a whole, so that the secondary transmission components are all accommodated in a cavity formed by the inner spur gear and the inner bevel gear.

The technical scheme adopted by the invention for solving the second technical problem is as follows: this hand-held type mixer, including casing, stirring annex and duplex cone planetary gear drive, duplex cone planetary gear drive establishes in the casing, its interior bevel gear and casing fixed setting, stir the annex and be and can dismantle the connection on the duplex cone planetary gear who is output gear, through this duplex cone planetary gear with the combined action of cone planetary gear support make stirring annex do three-dimensional planet and rotate, so need not remove the adjustment stirring effect by hand to the annex rotational speed is lower, and the operation is light comfortable.

In order to enable the stirring accessory to be assembled and disassembled quickly, the duplex cone planetary gear serving as the output gear is further provided with a connecting shaft part which can be used for connecting the stirring accessory in an axially downward mode, a stirring accessory insertion hole is formed in the connecting shaft part, the insertion hole is a blind hole, the accessory is prevented from contacting lubricating grease of the gear box, and food safety is guaranteed.

And the excircle of the end part of the connecting shaft part is provided with an annular clamping groove, and a spring is arranged in the clamping groove and used for quickly assembling and disassembling the stirring accessory.

Compared with the prior art, the invention has the advantages that:

1. the double-cone planetary gear mechanism is adopted, the transmission ratio is large, but the radial size is small, so that the rotating speed of accessories can be reduced, the vibration of a product is reduced, the operation is comfortable, the safety is good, and hands are not injured;

2. by adopting the duplex bevel planetary gear mechanism, the duplex bevel planetary gear and the bevel planetary gear bracket are simultaneously used as output ends, so that the motion of the stirring accessory is three-dimensional planetary rotation (the rotation axis of the duplex bevel planetary gear changes according to the cone shape) synthesized by the oblique rotation of the duplex bevel planetary gear and the planar revolution of the bevel gear bracket, and the stirring efficiency and effect are better;

3. the two-stage transmission is adopted, so that a large transmission ratio can be further made, and an ultra-large transmission ratio is realized;

4. the lower bracket of the straight planetary gear output by the first stage and the driving bevel gear input by the second stage are integrated, so that the structure is more compact.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic external view of an embodiment of the present invention;

FIG. 3 is a schematic exploded perspective view of a drive mechanism (including a whisk) according to an embodiment of the present invention;

FIG. 4 is a schematic view showing a straight planetary gear lower carrier and a drive bevel gear as an integral structure;

FIG. 5 is a schematic cross-sectional view reflecting a second stage duplex bevel planetary gear mechanism;

FIG. 6 is a perspective view of a plurality of crutcher attachments;

FIG. 7 is a schematic view reflecting the transmission principle of a single-connection bevel planetary gear mechanism;

fig. 8 is a schematic diagram reflecting the transmission principle of the duplex bevel planetary gear mechanism.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 8, a preferred embodiment of the present invention is a hand-held shaking machine equipped with a plurality of stirring accessories, the hand-held shaking machine mainly includes a housing 3, a duplex bevel planetary gear transmission mechanism 2 disposed in the housing, a motor 1 for driving the transmission mechanism to rotate, and a plurality of stirring accessories 4, which include a conventionally configured egg-beating cage 4c, a surface hook 4a and a stirring paddle 4b (as shown in fig. 6).

The duplex bevel planetary gear transmission mechanism 2 of this embodiment is the secondary drive, and the first order is duplex straight planetary gear mechanism 2a, and the second level is duplex bevel planetary gear mechanism 2b, wherein:

the first-stage duplex straight planetary gear mechanism 2a comprises a sun gear 21, three duplex straight planetary gears 22, a straight planetary gear bracket 23 and an inner straight gear 24, wherein the straight planetary gear bracket 23 is formed by combining an upper bracket 23a and a lower bracket 23b, the upper bracket 23a and the lower bracket 23b are in a circular splint shape, and are provided with connecting columns and connecting holes which can be mutually connected. The sun gear 21 and three duplex straight planetary gears 22 uniformly distributed along the circumference are clamped between the upper and lower brackets 23a, 23b, specifically, three gear shafts protruding upwards are arranged on the lower bracket 23b, the three duplex straight planetary gears 22 are arranged on the gear shafts, the sun gear 21 positioned at the center is fixed with the output shaft of the motor 1, and a round hole 231 through which the output shaft of the motor can pass is arranged at the center of the upper bracket 23 a. Thus, after the upper and lower brackets 23a, 23b are connected, they can be put into the inner spur gear 24 as an integral module, the inner spur gear 24 is in a ferrule shape and is fixedly arranged relative to the machine case 3, i.e. the inner spur gear 24 cannot rotate. After being installed, the upper straight gear 221 of each duplex straight planetary gear 22 is meshed with the sun gear 21, and the lower straight gear 222 is meshed with the inner straight gear 24 (as a speed reducing mechanism, the upper outer diameter of the duplex straight planetary gear is larger than the lower outer diameter, namely the number of teeth of the upper straight gear is larger than that of the lower straight gear).

When the motor is started, the output shaft of the motor and the sun gear 21 on the output shaft rotate, and because the upper straight gear 221 of each duplex straight planetary gear 22 is meshed with the sun gear 21 and the lower straight gear 222 is meshed with the inner straight gear 24, the sun gear 21 drives the straight planetary gear support 23 to rotate in a plane through the duplex straight planetary gears 22 (each duplex straight planetary gear revolves along with the straight planetary gear support while rotating). The straight planetary gear support 23 is used as the output end of the first stage transmission and also used as the input end of the second stage transmission, and the driving bevel gear 25 in the second stage duplex bevel planetary gear mechanism is integrally formed at the bottom of the lower support 23b, so that the lower support 23b of the first stage output end and the driving bevel gear 25 of the second stage input end are integrally formed, the whole transmission mechanism is very compact in structure, and the stirrer can be made smaller. In order to prevent the second-stage double bevel gears 26 from axially shifting, a shoulder surface 232 is further provided at the bottom of the lower bracket 23b, and the shoulder surface 232 may be a circular table surface formed at the bottom of the lower bracket 23 b.

The second-stage double-pinion planetary gear mechanism 2b includes the above-described drive bevel gear 25, three double-pinion planetary gears 26, a bevel planetary gear carrier 27, and an inner bevel gear 28, wherein:

the inner bevel gear 28 is in the shape of a non-straight cylindrical collar, the outer diameters of the upper and lower parts are different, the outer diameter of the upper part is larger than that of the lower part, and the bevel gear is arranged on the inner wall of the transition part of the upper and lower parts. In addition, an annular step 281 is provided at a position near the lower port inside the inner bevel gear 28 for receiving the iron ring 29. The inner bevel gear 28, like the inner spur gear, is also fixed relative to the housing 3, and is non-rotatable, and its upper end is just opposite to the lower end of the inner spur gear 24, and both are connected into a whole, so that the gears and the bracket in the secondary transmission member are all accommodated in the cavity formed by the inner spur gear and the inner bevel gear.

The bevel planetary gear carrier 27 is provided in the internal bevel gear 28 and supported at the bottom thereof by an iron ring 29, and the iron ring 29 functions as a bearing, which enables the bevel planetary gear carrier 27 to smoothly rotate in the internal bevel gear 28. The iron ring 29 is placed on the annular step 281 of the bevel inner gear 28.

One of the three duplex bevel planetary gears 26 is used as an output gear for connecting with the stirring accessory 4, and the other two are used as balance gears which can balance the stress of the output gear, so that the arrangement can reduce the vibration of the stirring machine and further improve the operation comfort. Three double-cone planetary gears 26 are all mounted on a cone planetary gear carrier 27 and are evenly arranged at circumferential intervals of 120 °. Specifically, two gear shafts 271 extending obliquely upwards and a through hole 272 extending obliquely downwards and penetrating through the bottom of the bevel planet gear carrier 27 are arranged on the bevel planet gear carrier 27, two double bevel planet gears 26a playing a balance role can be rotatably arranged on the gear shafts 271, the other double bevel planet gear 26b connected with the stirring accessory is arranged on the through hole 272 through a connecting shaft part 263 at the lower part, and an axial intersection angle alpha formed between the axis of the connecting shaft part 263 and the axis of the driving bevel gear 25 is an acute angle which can be selected to be 8-35 degrees, and the angle range can ensure that the stirring accessory 4 can stir in a proper space range, the stirring amplitude is proper, and the stirring effect is good. Therefore, the structure of the duplex bevel planetary gear 26b as the output end is different from that of the other two duplex bevel planetary gears 26a, besides the upper and lower bevel gears 261 and 262 which are integrated, a connecting shaft part 263 which can pass through a through hole is arranged in an axially downward extending manner, and a stirring accessory jack 264 is arranged in the connecting shaft part, so that the accessory is prevented from contacting with the lubricating grease of the gear box, and the food safety is ensured, the jack 264 is a blind hole. An annular clamping groove 265 is further formed in the outer circle of the end portion of the connecting shaft portion 263, a spring 5 is arranged in the clamping groove, the clamping jaw 41 on the accessory 4 can be clamped, and therefore the accessory can be pulled or pushed forcefully, the elasticity of the spring is expanded and retracted, the accessory can be pulled away or inserted, and the purpose of quick assembly and disassembly is achieved.

After the assembly, the upper bevel gears 261 of the three duplex bevel planetary gears 26 are meshed with the drive bevel gear 25, and the lower bevel gears 262 are meshed with the inner bevel gear 28 (also as speed reduction transmission, the outer diameters of the upper bevel gears of the duplex bevel planetary gears are larger than that of the lower bevel gears, that is, the number of teeth of the upper bevel gears is larger than that of the lower bevel gears). Thus, the drive bevel gear 25 rotating synchronously with the first stage straight planetary gear carrier 23 rotates each double straight planetary gear 26, and the bevel planetary gear carrier 27 rotates via the inner bevel gear 28, so that each double straight planetary gear 26 revolves along with the bevel planetary gear carrier 27 while rotating obliquely.

Referring to fig. 8, when the double conical planetary gear 26B is used as an output end, the conical planetary gear holder 27 is also used as an output end (in the figure, a represents input, B represents output of the single conical planetary gear mechanism, B1 represents holder end output of the double conical planetary gear mechanism, and B2 represents gear end output of the double conical planetary gear mechanism), so that the motion of the accessory 4 is three-dimensional planetary rotation synthesized by oblique rotation of the double conical planetary gear 26B and revolution along with the plane of the conical gear holder 27, and therefore, three-dimensional stirring is performed during the food stirring process, the rotating speed of the accessory is low (can reduce more than 35% of the rotating speed of the existing product), vibration is small, and therefore, manual movement is not needed to adjust the stirring effect, the stirring quality is good, the operation is easy and comfortable, and the safety is good.

The above description is only a preferred embodiment of the present invention, but it should be clearly understood that the present invention may be variously modified and varied by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. For example, the double straight planetary gear mechanism of the first stage may also adopt a single straight planetary gear mechanism, when the single straight planetary gear mechanism is adopted, each single straight planetary gear is simultaneously meshed with the sun gear and the inner straight gear, and the sun gear drives the straight planetary gear carrier to rotate in a plane through the single straight planetary gear, so that the driving bevel gear integrated with the lower carrier of the straight planetary gear carrier is also rotated; in addition, the driving bevel gear can also be directly fixed on the output shaft of the motor and directly driven by the motor without first-stage transmission, and the purpose of the invention can also be achieved; the number of the double bevel planet gears in the second stage transmission can be two, wherein one of the double bevel planet gears is used as a balancing gear, and the other double bevel planet gear is used as an output gear. In general, any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.