CN218165056U - Food processing machine convenient for speed regulation - Google Patents

Abstract

The utility model discloses a food preparation machine of convenient speed governing, the host computer that has power pack including inside, the cup subassembly of setting including cup and bowl cover on the host computer, the functional unit of setting in the cup, the lower extreme is connected with the power pack transmission, the variable speed subassembly that upper end and functional unit peg graft, the variable speed subassembly includes the high-speed driving gear, the low-speed driving gear, be equipped with high-speed driven gear correspondingly, the driven shaft of low-speed driven gear, the driven shaft includes high-speed position and low-speed position, the functional unit is including pressing down elasticity, so that the driven shaft is moved to the transmission shaft of high-speed position by the low-speed position, can make the axial positioning mechanism of driven shaft location at high-speed position or low-speed position, the transmission shaft upper end is rotationally supported inboard at the bowl cover, the transmission shaft lower extreme is connected with the transmission of driven shaft upper end. The utility model discloses can realize the quick variable speed of push type and reliably fix a position to promote user experience.

Description

Food processing machine convenient for speed regulation

Technical Field

The utility model belongs to the technical field of the domestic edible material processing apparatus, especially, relate to a food preparation machine of convenient speed governing.

Background

With the improvement of living standard, various multifunctional food processing machines suitable for household use, such as a food processor, a wall breaking machine and the like, are emerging. Existing food processors typically include a main machine having a motor for outputting power, and a cup assembly provided on the main machine to form various usage functions. Cup body assembly wherein closes the bowl cover, the detachably setting at the cup opening part at the cup lid that has the working chamber usually including the cup, the lid, and functional component includes knife tackle spare, and the functional component lower extreme is connected with the motor shaft transmission, and the motor drives functional component's knife tackle spare and rotates to realize making functions such as thick liquid, muddy flesh, stirring dough even. It will be appreciated that the knife assemblies need to have different rotational speeds, for example, when juicing or dry grinding as a breaker, the knife assemblies need to have very high rotational speeds, while when kneading dough or mincing, the knife assemblies need to have lower rotational speeds and higher torque. For this reason, a mechanical speed change mechanism is generally provided between the output shaft of the motor and the knife assembly. The speed change mechanism is arranged in the main machine in order to simplify the structure of the functional assembly, or the speed change mechanism is arranged at the lower part of the cutter assembly, so that a complete functional assembly is formed, and the problem of inconvenient switching speed exists.

It is known that the speed change of the mechanical speed change mechanism is usually realized by the transmission cooperation between gears with different transmission ratios. For example, two driving gears are coaxially arranged on a driving shaft connected with a motor, or two driven gears are coaxially arranged on a driven shaft of the cutter assembly, or two driving gears are coaxially arranged on the driving shaft and two driven gears are coaxially arranged on the driven shaft at the same time, and different driving gears are meshed with the same driven gear, or the driving gears are meshed with different driven gears, or different driving gears are meshed with corresponding driven gears by axially moving the driven shaft, so that different transmission ratios are obtained, and the cutter assembly forms different rotating speeds.

However, the speed change mechanism of the existing food processor still has the following technical defects: it is known that when the driven shaft of the knife assembly is arranged to move in an axial direction, it needs to be positioned in order to reliably switch between different gear ratios. At present, people usually rotate a driven shaft with a screw mechanism to realize axial movement and positioning of the driven shaft, and the driven shaft must be rotated to a limit position to ensure accurate positioning of the driven shaft, namely, the driven shaft cannot be directly pressed to realize the axial movement and positioning, so that the trouble of speed change is caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a food preparation machine of convenient speed governing can realize the quick variable speed of push type and reliably fix a position to promote user experience.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a food preparation machine of convenient speed governing, including the inside host computer that has power pack, the cup subassembly of setting including cup and bowl cover on the host computer, the functional unit of setting in the cup, the lower extreme is connected with the power pack transmission, the variable speed subassembly of upper end and functional unit grafting, the variable speed subassembly includes the high-speed driving gear, the low-speed driving gear, be equipped with high-speed driven gear correspondingly, the driven shaft of low-speed driven gear, the driven shaft includes high-speed position and low-speed position, the functional unit is including can pressing down the elasticity, so that the driven shaft removes the transmission shaft to the high-speed position by the low-speed position, can make the driven shaft fix a position the axial positioning mechanism at high-speed position or low-speed position, the transmission shaft upper end is rotationally supported inboard at the bowl cover, the transmission shaft lower extreme is connected with the transmission of driven shaft upper end.

Similarly with current food processing machine, the utility model discloses a host computer, cup body component, functional component, variable speed subassembly, the during operation, power unit (motor) in the host computer, through variable speed subassembly the variable speed, transfer turn round the back with power transmission for functional component to eat material to the cup body component in and carry out corresponding processing, for example, accomplish when rotating at a high speed and squeeze juice or dry grinding, stir dough or minced steak when rotating at a low speed.

It is known that the speed change of the mechanical speed change mechanism is usually realized by matching gear sets with different transmission ratios. To this end, the driven shaft includes a high speed position and a low speed position in the axial direction, and the functional unit includes a drive shaft resiliently depressible downward to move the driven shaft from the low speed position to the high speed position, and an axial positioning mechanism for positioning the driven shaft in the high speed position or the low speed position. When the speed change assembly needs to be changed so as to enable the functional assembly to realize different functions, the functional assembly can be pressed downwards, and the driven shaft is positioned at a high-speed position or a low-speed position through the axial positioning mechanism, so that the required high speed or low speed is obtained.

It can be understood that the axial positioning mechanism can position the driven shaft at a high speed position or a low speed position, so that the speed change operation and switching of the speed change assembly can be greatly facilitated, and the reliable positioning of the speed change assembly at two speeds can be realized. That is to say, "one step in place" of variable speed can be realized, and then user experience is promoted.

Preferably, the high-speed driven gear and the low-speed driven gear are arranged at the lower end of the driven shaft from bottom to top, the speed change assembly comprises a planetary gear mechanism with an outer shell, the low-speed driving gear is an inner gear ring arranged at the upper end of a planet carrier of the planetary gear mechanism, the high-speed driving gear is a gear sleeve with inner and outer teeth positioned below the planet carrier, and the outer teeth of the gear sleeve are meshed with the planet gears.

It is known that a transmission assembly including a planetary gear mechanism has a small outer size and a large transmission range. Because most functions of the food processor are realized by the low-speed functional assembly, and the low-speed position is higher than the high-speed position, namely, the driven shaft of the food processor is defaulted to be at the higher low-speed position, the low-speed driving gear of the planetary gear mechanism is meshed with the low-speed driven gear at the upper part of the driven shaft, so that the functional assembly has a low-speed rotation with larger torque; when the high-speed function is needed to be realized, the corresponding functional assembly is connected to the driven shaft of the speed change assembly, then the functional assembly is pressed downwards, and the high-speed driven gear at the lower end of the driven shaft is meshed with the high-speed driving gear of the planetary gear mechanism, so that the high-speed rotation of the functional assembly is realized.

Particularly, the low-speed driving gear is an inner gear ring arranged at the upper end of a planet carrier of the planetary gear mechanism, the high-speed driving gear is a gear sleeve which is positioned below the planet carrier and is provided with inner and outer teeth, and the outer teeth of the gear sleeve are meshed with the planetary gear. That is to say, low-speed driving gear, high-speed driving gear, low-speed driven gear, high-speed driven gear can coaxial setting to conveniently make the driven shaft reciprocate through pressing, then realize the variable speed and transmit power. Further, it will be appreciated that the number of teeth and the outer diameter of the high speed driven gear should be smaller than the number of teeth and the outer diameter of the low speed driven gear. When the high-speed driven gear and the low-speed driven gear are arranged on the driven shaft from bottom to top, a reversed pagoda-shaped structure with a large top and a small bottom is formed, so that the driven shaft can move axially downwards conveniently, and the high-speed driven gear is meshed with a gear sleeve serving as a high-speed driving gear.

Preferably, the speed change assembly further comprises an elastic pressing mechanism which can make the driven shaft move up to the low speed position.

The elastic jacking mechanism applies upward elastic force to the driven shaft, so that the driven shaft of the food processor can be elastically positioned at a higher low-speed position in an initial state.

Preferably, the elastic jacking mechanism comprises a lower spring positioned at the lower end of the driven shaft and an anti-withdrawal connecting rod positioned at the upper end of the driven shaft, and an upper spring is arranged at the upper end of the anti-withdrawal connecting rod.

It can be appreciated that the upper spring applies a downward spring force to the follower shaft and the lower spring applies an upward spring force to the follower shaft, thereby resiliently positioning the follower shaft at the higher low speed position and avoiding axial loose displacement of the follower shaft. Of course, the elastic force of the lower spring should be greater than that of the upper spring.

Preferably, the transmission shaft comprises a cylindrical cover at the lower end, the axial positioning mechanism comprises a jaw sleeve positioned in the cylindrical cover and a brake clamping sleeve sleeved on the jaw sleeve, the brake clamping sleeve is provided with upper wedge-shaped teeth, the jaw sleeve is provided with lower wedge-shaped teeth, the front side and the rear side of the upper wedge-shaped teeth of the brake clamping sleeve are provided with shallow grooves and deep grooves, and when the driven shaft is positioned at a low-speed position, the lower wedge-shaped teeth extend into the deep grooves; when the driven shaft is located at a high-speed position, the lower wedge-shaped teeth extend into the shallow grooves.

When people need to switch between low speed and high speed, the functional component can be pressed downwards, the transmission shaft moves downwards at the moment, and then the driven shaft is driven to move downwards, so that the high-speed driven gear is meshed with a gear sleeve (as a high-speed driving gear) with internal and external teeth positioned below the planet carrier, namely, the gear sleeve (as the high-speed driving gear) is a sun gear of the planetary gear mechanism, therefore, a power unit (motor) in the main machine can directly drive the driven shaft to rotate at high speed through the gear sleeve and the high-speed driven gear, and the planet carrier and the like of the planetary gear mechanism still keep a rotating state at the moment.

It is known that in the prior art, axial movement and positioning of the driven shaft with a screw mechanism and thus speed change are usually achieved by rotating the driven shaft, and therefore, the driven shaft must be rotated in a troublesome manner to achieve speed change, which causes trouble in speed change.

Particularly, because the front side and the rear side of the upper wedge-shaped teeth are respectively provided with the shallow groove and the deep groove, when a plurality of upper wedge-shaped teeth are arranged in the circumferential direction, the shallow groove and the deep groove are formed between the adjacent upper wedge-shaped teeth. That is, the shallow grooves and the deep grooves are formed to be distributed in order in the circumferential direction.

In addition, because last wedge tooth, lower wedge tooth have the unilateral hypotenuse, consequently, when the transmission shaft drove the driven shaft and move down, can drive the brake cutting ferrule that the cover was established on the jack catch cover through the drum cover simultaneously and move down, at this moment, the unilateral hypotenuse on the last wedge tooth of brake cutting ferrule extrudees the unilateral hypotenuse of the lower wedge tooth on the jack catch cover to form relative rotation. When the driven shaft moves downwards to a high-speed position, the lower wedge-shaped teeth on the clamping claw sleeve slide into the shallow grooves on one side of the upper wedge-shaped teeth for positioning, so that the automatic rotation is avoided. On the contrary, when the driven shaft moves upwards under the action of the elastic jacking mechanism, the single-side bevel edge of the lower wedge-shaped tooth on the clamping jaw sleeve extrudes the single-side bevel edge of the upper wedge-shaped tooth on the brake clamping sleeve, so that relative rotation is formed. When the driven shaft moves upwards to a low-speed position, the lower wedge-shaped teeth on the clamping claw sleeve slide into the deep grooves on the other side of the upper wedge-shaped teeth for positioning, so that the self-rotation is avoided.

That is, the axial positioning mechanism can convert axial pressing into circumferential rotation, and realize reliable positioning, thereby greatly facilitating speed change operation.

Preferably, the axial positioning mechanism further comprises a positioning cylinder arranged at the upper end of the outer shell, the claw sleeve is sleeved on the positioning cylinder, a positioning lug is arranged on the inner wall of the claw sleeve, the positioning lug comprises a first inclined plane and a second inclined plane, the lower ends of the first inclined plane and the second inclined plane are intersected, and a positioning surface is connected between the upper ends of the first inclined plane and the second inclined plane, and positioning salient points attached to the first inclined plane, the positioning surface or the second inclined plane are arranged on the circumferential surface of the positioning cylinder.

It will be appreciated that the outer housing belonging to the transmission assembly is axially stationary, since the axial positioning mechanism also needs to achieve positioning of the driven shaft after axial movement, i.e. relative to the outer housing. Therefore, a positioning cylinder is arranged at the upper end of the outer shell, and the clamping jaw sleeve is sleeved on the positioning cylinder, namely, the clamping jaw sleeve realizes central positioning and rotary connection through the positioning cylinder.

The inner wall of the clamping claw sleeve is provided with a positioning lug which comprises a first inclined plane, a second inclined plane and a positioning plane, and the circumferential surface of the positioning cylinder is provided with positioning salient points. In addition, the clamping jaw sleeve and the positioning cylinder are elastically extruded in the axial direction, so that the positioning salient points on the circumferential surface of the positioning cylinder can elastically abut against the first inclined surface, the positioning surface or the second inclined surface.

In particular, the lower ends of the first and second inclined surfaces of the positioning projection intersect, and the positioning surface is connected between the upper ends of the first and second inclined surfaces, i.e., the positioning projection is substantially triangular.

If the first inclined surface is located on the lower side of the second inclined surface, the deep groove on one side of the upper wedge-shaped tooth forms a circumferential relative positioning when the positioning salient point elastically abuts against the first inclined surface to form an axial relative positioning at a high speed position.

At the moment, a user presses the transmission shaft downwards to drive the jaw sleeve to move axially relative to the positioning cylinder, and correspondingly, the positioning convex block is elastically attached to the positioning convex point of the first inclined surface to enable the positioning convex block to rotate for an angle together with the jaw sleeve, the driven shaft and the transmission shaft; when the user loosens the transmission shaft, the elastic jacking mechanism drives the clamping claw sleeve, the driven shaft and the transmission shaft to move upwards and reset together, and at the moment, the elastic jacking mechanism elastically leans against the positioning salient point of the first inclined surface to move to the positioning surface connected with the upper end of the first inclined surface, so that the axial positioning of the driven shaft at a higher low-speed position is realized.

When the user presses the transmission shaft downwards again, the clamping claw sleeve is driven to move downwards axially relative to the positioning cylinder again, and at the moment, the positioning convex points elastically attached to the positioning surface are separated from the positioning surface. When the elastic jacking mechanism drives the jaw sleeve, the driven shaft and the transmission shaft to move upwards together for resetting, the positioning salient points are attached to the second inclined plane, the jaw sleeve rotates for an angle relative to the positioning cylinder in the circumferential direction, and initial positioning of the driven shaft in the axial direction is achieved.

Similarly, when the user presses the transmission shaft downwards to position the driven shaft at a lower high-speed position, the positioning convex block elastically clings to the positioning convex point of the second inclined plane to enable the positioning convex block to rotate for an angle together with the jaw sleeve, the driven shaft and the transmission shaft; along with the release of the transmission shaft by a user, the elastic jacking mechanism drives the clamping jaw sleeve, the driven shaft and the transmission shaft to move upwards together for resetting, and at the moment, the positioning salient points move to the lower side of the first inclined plane and elastically lean against the first inclined plane, so that the axial positioning of the driven shaft at a lower high-speed position is realized.

Preferably, the positioning salient point is in a water drop shape with a small upper end and a large lower end, or in a triangular shape with a vertical side on the right side, or in an isosceles triangular shape with an inward concave arc side on the bottom side.

The two arc sides can be formed on two sides by the water-drop-shaped positioning salient points, so that the water-drop-shaped positioning salient points can be conveniently attached to and slide along the corresponding first inclined plane and the corresponding second inclined plane, and the friction resistance during sliding is reduced to the maximum extent. In addition, the arc-shaped edge with the larger lower end is beneficial to being attached to the positioning surface and positioned.

Of course, the right side is a triangle shape of the vertical side, or the bottom side is an isosceles triangle shape of the concave arc side, so that the technical effects of being convenient to form the first inclined plane and the second inclined plane corresponding to the triangle shape to fit and slide and being convenient to form the positioning on the positioning surface can be achieved.

Preferably, the circumferential surface of the claw sleeve is provided with a limiting ring so as to form a rotary connection with the cylindrical cover.

The clamping jaw sleeve is conveniently in rotating connection with the cylinder cover through a limiting ring matched with the cylinder cover. Of course, it is necessary to provide the cylinder cover with corresponding fitting grooves, and the limit rings of the claw sleeves are rotatably locked in the fitting grooves by the elastic deformation of the claw sleeves and the cylinder cover.

Preferably, the upper end of the driven shaft is sleeved with a cap-shaped connector, and the connector is connected in the jaw sleeve in a transmission manner.

Because the connector at the upper end of the driven shaft is in transmission connection with the jaw sleeve, a power unit (motor) of the host machine can transmit power to the driven shaft, and transmits the power to the jaw sleeve through the connector, and then drives the transmission shaft to rotate, so that the functional component can complete corresponding functions.

Preferably, the circumferential surface of the brake cutting sleeve is provided with a rotation stopping bulge extending along the axial direction, so that the rotation stopping bulge and the cylindrical cover form an axial movable connection.

The rotation stopping protrusion enables the brake clamping sleeve and the cylinder cover to be movably connected in the axial direction, on one hand, when the transmission shaft is conveniently pressed, the cylinder cover and the brake clamping sleeve move in the axial direction, on the other hand, a power element convenient to drive power to the transmission shaft through the speed change assembly, and then the function assembly achieves corresponding functions.

Therefore, the utility model discloses following beneficial effect has: the push type quick speed change and reliable positioning can be realized, and therefore user experience is improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic illustration of an exploded construction of the transmission assembly.

Fig. 3 is a schematic view of a disassembled connection structure of the functional assembly and the outer shell.

Fig. 4 is an exploded view of the drive shaft and the outer housing.

Fig. 5 is a schematic view of a matching structure of the positioning bumps and the positioning bumps (the arrow direction in the figure is a sliding direction of the positioning bumps on the positioning bumps).

Fig. 6 is a schematic view of a first structure of the positioning bump.

Fig. 7 is a schematic diagram of a second structure of the positioning bump.

Fig. 8 is a schematic view of a third structure of the positioning bump.

In the figure: 1. the main engine 11 comprises a power unit 2, a cup body assembly 21, a cup body 22, a cup cover 3, a functional assembly 31, a transmission shaft 311, a cylinder cover 312, a matching groove 313, a rotation stopping convex rib 4, a speed changing assembly 41, a high-speed driving gear 42, a low-speed driving gear 43, a high-speed driven gear 44, a low-speed driven gear 5, a driven shaft 51, a connector 6, a planetary gear mechanism 61, an outer shell 611, a positioning cylinder 612, a positioning convex point 62, a planet carrier 63, a planet wheel 70, a lower spring 71, a back-proof connecting rod 72, an upper spring 8, a clamping claw sleeve 80, a lower wedge-shaped tooth 801, a positioning convex block 802, a first inclined plane 803, a second inclined plane 804, a positioning plane 81, a brake clamping sleeve 811, an upper wedge-shaped tooth 812, a shallow groove 813, a deep groove 814, a rotation stopping convex 82 and a limiting ring.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

As shown in figures 1 and 2, the food processor convenient for speed regulation comprises a main machine 1 with a power unit 11 inside, a cup body assembly 2 arranged on the main machine and comprising a cup body 21 and a cup cover 22, a functional assembly 3 arranged in the cup body, and a speed change assembly 4 with the lower end connected with the power unit in a transmission way and the upper end connected with the functional assembly in an insertion way. Specifically, the speed change assembly includes a high-speed driving gear 41, a low-speed driving gear 42, a high-speed driven gear 43 engageable with the high-speed driving gear to transmit a small torque at a high rotation speed, and a low-speed driven gear 44 engageable with the low-speed driving gear to transmit a large torque at a low rotation speed, the high-speed driven gear and the low-speed driven gear being disposed on the same axially movable driven shaft 5 including a high-speed position and a low-speed position. In addition, the functional components comprise a transmission shaft 31 which can elastically press the driven shaft downwards so as to switch the driven shaft back and forth between a low-speed position and a high-speed position, and an axial positioning mechanism which can position the driven shaft at the high-speed position or the low-speed position, wherein the upper end of the transmission shaft is rotatably supported on the inner side of the cup cover, and the lower end of the transmission shaft is in transmission connection with the upper end of the driven shaft.

Similar to the existing food processing machine, during operation, the power unit (motor) in the main machine transmits power to the functional component after speed change and torque adjustment of the speed change component, so that the food in the cup body component is correspondingly processed, for example, juicing or dry grinding is completed during high-speed rotation, and dough stirring or meat grinding is completed during low-speed rotation. Of course, the functional assembly also includes a knife assembly corresponding to the function to be achieved. Since the general construction, the operating principle, the functions that can be achieved, and the functions of such food processors are prior art, they are not described in detail in this embodiment.

When the speed change assembly needs to be changed so as to enable the functional assembly to realize different functions, the functional assembly can be pressed downwards, and the driven shaft is positioned at a high-speed position or a low-speed position through the axial positioning mechanism, so that the required high speed or low speed is obtained.

It can be understood that the driven shaft is positioned at a high-speed position or a low-speed position through the axial positioning mechanism, so that the speed change operation and switching of the speed change assembly can be greatly facilitated, the reliable positioning of the speed change assembly on two speeds can be realized, and the speed change can be realized in one step to improve the user experience.

Preferably, the high-speed driven gear and the low-speed driven gear are arranged at the lower end of the driven shaft from bottom to top, the speed change assembly comprises a planetary gear mechanism 6 with an outer shell 61, the low-speed driving gear is an inner gear ring arranged at the upper end of a planet carrier 62 of the planetary gear mechanism, the high-speed driving gear is a gear sleeve with inner and outer teeth positioned below the planet carrier, and the outer teeth of the gear sleeve are meshed with the planet gears 63. That is, the ring gear is fixedly connected with the planet carrier and thus becomes a part of the planet carrier, and the gear sleeve is the sun gear.

As is known, the planetary gear mechanism is a common mechanical speed change mechanism, and has the characteristics of small external dimension and large speed change range, and the specific structure, the operating principle, the functions and the like of the planetary gear mechanism are not described in detail in this embodiment.

Since most functions of the food processor are realized by the low-speed functional assembly, and the low-speed position is higher than the high-speed position, that is, the driven shaft of the food processor is defaulted to be at the higher low-speed position, the low-speed driving gear of the planetary gear mechanism is engaged with the low-speed driven gear at the upper part of the driven shaft, so that the functional assembly has a low-speed rotation with larger torque.

When the high-speed function is needed to be realized, the corresponding functional assembly is connected to the driven shaft of the speed change assembly, then the functional assembly is pressed downwards, and the high-speed driven gear at the lower end of the driven shaft is meshed with the high-speed driving gear of the planetary gear mechanism, so that the high-speed rotation of the functional assembly is realized.

Especially, the low-speed driving gear is the ring gear that sets up in planetary gear mechanism's planet carrier upper end, and the high-speed driving gear is for being located the planet carrier below has the tooth cover of interior external tooth to conveniently make the driven shaft reciprocate through pressing, realize the variable speed then and transmit power. Of course, the number of teeth and the outer diameter of the high-speed driven gear should be smaller than those of the low-speed driven gear. When the high-speed driven gear and the low-speed driven gear are arranged on the driven shaft from bottom to top, a reversed pagoda-shaped structure with a large upper part and a small lower part is formed, so that the driven shaft can move axially downwards conveniently, and then the high-speed driven gear is meshed with a gear sleeve serving as a high-speed driving gear.

Furthermore, the speed change assembly also comprises an elastic pressing mechanism which can enable the driven shaft to move upwards to a low-speed position.

That is, the elastic pressing mechanism forms an upward elastic force on the driven shaft, so that the driven shaft of the food processor can be elastically positioned at a higher low-speed position in an initial state to meet the speed change requirements of most functions.

Specifically, the elastic jacking mechanism comprises a lower spring 70 positioned at the lower end of the driven shaft and an anti-return connecting rod 71 positioned at the upper end of the driven shaft, and an upper spring 72 is arranged at the upper end of the anti-return connecting rod. The upper spring applies a downward elastic force to the anti-backing connecting rod, so that the lower end of the anti-backing connecting rod is abutted against the upper end of the driven shaft, the resultant force of the lower spring and the upper spring forms an upward elastic force on the driven shaft, namely, the lower spring applies an upward elastic force on the driven shaft, and after the downward elastic force of the upper spring is overcome, the driven shaft is elastically positioned at a higher low-speed position, and the axial loosening and displacement of the driven shaft are avoided. Of course, the elastic force of the lower spring should be greater than that of the upper spring.

As another preferable scheme, as shown in fig. 3 and 4, the transmission shaft includes a cylindrical cover 311 at the lower end, the axial positioning mechanism includes a jaw sleeve 8 and a brake sleeve 81 located in the cylindrical cover, the brake sleeve is sleeved on the jaw sleeve, a plurality of upper wedge teeth 811 uniformly distributed in the circumferential direction are arranged at the lower end of the brake sleeve, a plurality of lower wedge teeth 80 uniformly distributed in the circumferential direction are arranged on the jaw sleeve, the number of the upper wedge teeth is twice that of the lower wedge teeth, and a shallow groove 812 and a deep groove 813 extending upward are arranged on the front and rear sides of the upper wedge teeth of the brake sleeve.

The wedge-shaped teeth mean that one side of the teeth is a single-side oblique edge, and the other side of the teeth is a vertical straight edge. It will be appreciated that there will be both shallow and deep troughs between adjacent upper wedge teeth. That is, the shallow grooves and the deep grooves are formed to be distributed in order in the circumferential direction. In addition, the driven shaft should be located in the cylindrical cover of the transmission shaft so that the transmission shaft can drive the driven shaft to move downwards. Of course, the anti-back connecting rod and the upper spring are positioned in the transmission shaft at the moment.

When the user needs to switch between low speed and high speed, the functional component can be pressed downwards, the transmission shaft moves downwards at the moment, and then the driven shaft is driven to move downwards, so that the high-speed driven gear is meshed with a gear sleeve (as a high-speed driving gear) which is positioned below the planet carrier and provided with internal and external teeth, namely the gear sleeve (as the high-speed driving gear) is the sun gear of the planetary gear mechanism, therefore, a power unit (motor) in the main machine can directly drive the driven shaft to rotate at high speed through the gear sleeve and the high-speed driven gear, and the planet carrier and the like of the planetary gear mechanism still keep a rotating state at the moment.

When the transmission shaft drives the driven shaft to move downwards, the cylinder cover drives the brake clamping sleeve sleeved on the jaw sleeve to move downwards, and at the moment, the single-side inclined edge of the upper wedge-shaped tooth of the brake clamping sleeve extrudes the single-side inclined edge of the lower wedge-shaped tooth on the jaw sleeve, so that relative rotation is formed. When the driven shaft moves downwards to a high-speed position, the lower wedge-shaped teeth on the clamping claw sleeve slide into the shallow grooves on one side of the upper wedge-shaped teeth for positioning, so that the automatic rotation is avoided. On the contrary, when the driven shaft moves upwards under the action of the elastic jacking mechanism, the single-side bevel edge of the lower wedge-shaped tooth on the clamping jaw sleeve extrudes the single-side bevel edge of the upper wedge-shaped tooth on the brake clamping sleeve, so that relative rotation is formed. When the driven shaft moves upwards to a low-speed position, the lower wedge-shaped teeth on the clamping claw sleeve slide into the deep grooves on the other side of the upper wedge-shaped teeth for positioning, so that the self-rotation is avoided.

That is to say, at the pushing down in-process of transmission shaft, the jack catch cover forms relative rotation with the brake cutting ferrule, and at this in-process, axial positioning mechanism converts axial pressing into the rotation of circumference to realize reliable location, thereby the very big variable speed of conveniently controlling. In addition, when the driven shaft is at a higher low-speed position, the upper end of the lower wedge-shaped tooth is matched with the bottom of the deep groove; when the driven shaft is at a high-speed position with a lower bottom, the upper end of the lower wedge-shaped tooth is matched with the bottom of the shallow slot

Further, as shown in fig. 4 and 5, the axial positioning mechanism further includes a positioning cylinder 611 disposed at an upper end of the outer housing of the planetary gear mechanism, and the pawl sleeve is sleeved on the positioning cylinder, so that the pawl sleeve is centrally positioned by the positioning cylinder and is rotatably connected with the positioning cylinder. In addition, the inner wall of the claw sleeve is provided with a positioning bump 801 which is roughly triangular and specifically comprises a first inclined plane 802 and a second inclined plane 803 with the lower ends thereof intersected and a positioning plane 804 connected between the upper ends of the first inclined plane and the second inclined plane, and the circumferential surface of the positioning cylinder is provided with a positioning salient point 612.

As described above, the pawl sleeve and the positioning cylinder are elastically pressed in the axial direction by the elastic pressing mechanism, and therefore, the positioning protrusions on the circumferential surface of the positioning cylinder elastically abut against the first inclined surface, the positioning surface, or the second inclined surface.

If the first inclined surface is located on the lower side of the second inclined surface, the deep groove on the side of the upper wedge tooth forms a circumferential relative positioning when the positioning convex point elastically abuts against the first inclined surface to form an axial relative positioning at the high speed position.

At the moment, a user presses the transmission shaft downwards to drive the jaw sleeve to move axially relative to the positioning cylinder, and correspondingly, the positioning convex block is elastically attached to the positioning convex point of the first inclined plane to enable the positioning convex block to rotate for an angle together with the jaw sleeve, the driven shaft and the transmission shaft; when the transmission shaft is loosened by a user, the elastic jacking mechanism drives the clamping claw sleeve, the driven shaft and the transmission shaft to move upwards and reset together, and at the moment, the elastic jacking mechanism elastically clings to the positioning salient point of the first inclined surface and moves to the positioning surface connected with the upper end of the first inclined surface, so that the axial positioning of the driven shaft at a higher low-speed position is realized.

When the user presses the transmission shaft downwards again, the claw sleeve is driven to move downwards relative to the positioning cylinder axially again, and at the moment, the positioning convex points elastically attached to the positioning surface are separated from the positioning surface. When the elastic jacking mechanism drives the jaw sleeve, the driven shaft and the transmission shaft to move upwards together for resetting, the positioning salient points are attached to the second inclined plane, the jaw sleeve rotates for an angle relative to the positioning cylinder in the circumferential direction, and initial positioning of the driven shaft in the axial direction is achieved.

Similarly, when the user presses the transmission shaft downwards to position the driven shaft at a lower high-speed position, the positioning convex block elastically clings to the positioning convex point of the second inclined plane to enable the positioning convex block to rotate for an angle together with the jaw sleeve, the driven shaft and the transmission shaft; along with the release of the transmission shaft by a user, the elastic jacking mechanism drives the clamping jaw sleeve, the driven shaft and the transmission shaft to move upwards together for resetting, and at the moment, the positioning salient points move to the lower side of the first inclined plane and elastically lean against the first inclined plane, so that the axial positioning of the driven shaft at a lower high-speed position is realized.

That is, by pressing and releasing the transmission shaft, the positioning protrusion, the pawl sleeve, the driven shaft, and the transmission shaft are always rotated by an angle in one direction, and then switched back and forth between a lower high-speed position, a higher low-speed position, and an initial position.

Further, as shown in fig. 6, 7 and 8, the positioning salient point may be in a shape of a droplet with a small upper end and a large lower end, or in a shape of a triangle with a vertical side at the right side, or in a shape of an isosceles triangle with an inward concave arc at the bottom.

The two arc sides can be formed at both sides to the location bump of water droplet form to be convenient for form the laminating with corresponding first inclined plane, second inclined plane and slide, frictional resistance when furthest reduces and slides. In addition, the arc-shaped edge with the larger lower end is beneficial to being attached to the positioning surface and positioning.

Of course, the right side is a triangle shape of the vertical side, or the bottom side is an isosceles triangle shape of the concave arc side, so that the technical effects of being convenient to form the first inclined plane and the second inclined plane corresponding to the triangle shape to fit and slide and being convenient to form the positioning on the positioning surface can be achieved.

In order to facilitate the assembly and connection of the claw sleeve and the cylindrical cover, a limiting ring 82 can be arranged on the circumferential surface of the claw sleeve, a corresponding matching groove 312 is arranged on the inner side wall of the cylindrical cover, and the limiting ring of the claw sleeve can be rotatably clamped in the matching groove through the elastic deformation of the claw sleeve and the cylindrical cover so as to form rotary connection with the cylindrical cover.

In order to facilitate the assembly connection of functional components of the driven shaft and transmit torque, a cap-shaped connector 51 is sleeved at the upper end of the driven shaft and is in transmission connection with a brake sleeve. Of course, the upper end of the driven shaft can be in transmission connection with the connecting head through structures such as flat or polygonal shapes or splines. Therefore, the power unit (motor) of the main machine can transmit power to the driven shaft, and transmits the power to the jaw sleeve through the connector, so as to drive the transmission shaft to rotate, and accordingly the functional assembly can complete corresponding functions.

In addition, the circumferential surface of the brake cutting sleeve can be provided with rotation stopping protrusions 814 extending along the axial direction, rotation stopping grooves are formed between the adjacent rotation stopping protrusions, rotation stopping convex ribs 313 extending along the axial direction are arranged on the inner side wall of the cylindrical cover, and the rotation stopping convex ribs are matched in the rotation stopping grooves, so that the brake cutting sleeve and the cylindrical cover are axially movably connected, but the brake cutting sleeve and the cylindrical cover cannot rotate relatively. On one hand, when the transmission shaft is conveniently pressed, the cylinder cover and the brake clamping sleeve form axial relative movement, on the other hand, the power element convenient for transmits power to the transmission shaft through the speed change assembly, and then the functional assembly achieves corresponding functions.

It is understood that various changes and modifications other than those described in the preferred embodiments described above may be made by those skilled in the art without departing from the spirit of the invention, and the scope of the invention is defined by the appended claims.

Claims (10)

1. The utility model provides a food preparation machine of convenient speed governing, including the inside host computer that has power unit, the cup subassembly that sets up on the host computer including cup and bowl cover, the functional unit of setting in the cup, the lower extreme is connected with the power unit transmission, the variable speed subassembly of upper end and functional unit grafting, characterized by, the variable speed subassembly includes the high-speed driving gear, the low-speed driving gear, be equipped with high-speed driven gear correspondingly, the driven shaft of low-speed driven gear, the driven shaft includes high-speed position and low-speed position, the functional unit is including pressing down the elasticity, so that the driven shaft removes the transmission shaft to the high-speed position by the low-speed position, can make the driven shaft fix a position the axial positioning mechanism at high-speed position or low-speed position, the transmission shaft upper end rotationally supports at the bowl cover inboard, the transmission shaft lower extreme is connected with the transmission of driven shaft upper end transmission.

2. The food processor facilitating speed regulation as claimed in claim 1, wherein the high-speed driven gear and the low-speed driven gear are disposed at a lower end of the driven shaft from bottom to top, the speed change assembly includes a planetary gear mechanism having an outer housing, the low-speed driving gear is an inner gear ring disposed at an upper end of a carrier of the planetary gear mechanism, the high-speed driving gear is a sleeve having inner and outer teeth disposed below the carrier, and the outer teeth of the sleeve are engaged with the planetary gears.

3. The food processor facilitating speed regulation as claimed in claim 1, wherein the speed change assembly further comprises a resilient urging means for resiliently urging the driven shaft upwardly to the low speed position.

4. The food processor with the convenient speed regulation as claimed in claim 3, wherein the elastic top pressing mechanism comprises a lower spring positioned at the lower end of the driven shaft and an anti-return connecting rod positioned at the upper end of the driven shaft, and the upper spring is arranged at the upper end of the anti-return connecting rod.

5. The food processor convenient for speed regulation as claimed in claim 2, wherein the transmission shaft comprises a cylindrical cover at the lower end, the axial positioning mechanism comprises a jaw sleeve positioned in the cylindrical cover, and a brake sleeve sleeved on the jaw sleeve, an upper wedge-shaped tooth is arranged on the brake sleeve, a lower wedge-shaped tooth is arranged on the jaw sleeve, a shallow groove and a deep groove are arranged on the front side and the rear side of the upper wedge-shaped tooth of the brake sleeve, and the lower wedge-shaped tooth extends into the deep groove when the driven shaft is positioned at the low-speed position; when the driven shaft is located at a high-speed position, the lower wedge-shaped teeth extend into the shallow grooves.

6. The food processor with convenient speed regulation as claimed in claim 4, wherein the axial positioning mechanism further comprises a positioning cylinder arranged at the upper end of the outer shell, the pawl sleeve is sleeved on the positioning cylinder, the inner wall of the pawl sleeve is provided with a positioning lug, the positioning lug comprises a first inclined surface and a second inclined surface which are intersected at the lower ends, and a positioning surface connected between the upper ends of the first inclined surface and the second inclined surface, and a positioning salient point which is attached to the first inclined surface, the positioning surface or the second inclined surface is arranged on the circumferential surface of the positioning cylinder.

7. The food processor with convenient speed regulation as claimed in claim 6, wherein the positioning salient point is in a drop shape with a small upper end and a large lower end, or in a triangular shape with a vertical side at the right side, or in an isosceles triangular shape with an inward concave arc side at the bottom edge.

8. A food processor facilitating speed regulation as claimed in claim 5, wherein the pawl sleeve is provided on its circumferential surface with a retaining ring for rotational connection with the cylindrical cage.

9. The food processor convenient for speed regulation as claimed in claim 5, wherein the upper end of the driven shaft is sleeved with a cap-shaped connector, and the connector is in transmission connection with the brake sleeve.

10. A food processor with easy speed regulation according to claim 5, wherein the circumferential surface of the brake sleeve is provided with a rotation stop projection extending in the axial direction so as to form an axially movable connection with the cylinder cover.

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