WO2017024672A1

WO2017024672A1 - Speed changer for food processing

Info

Publication number: WO2017024672A1
Application number: PCT/CN2015/091720
Authority: WO
Inventors: 方志华
Original assignee: 杭州厨意科技有限公司
Priority date: 2015-08-12
Filing date: 2015-10-12
Publication date: 2017-02-16
Also published as: CN106438875A

Abstract

A speed changer for food processing comprises a gearbox comprising a housing (1) and a gear shift mechanism. The housing (1) is provided therein with a planetary frame (3), a planet gear (4), a sun gear (8), and a sliding ring gear (6). The sliding ring gear (6) is connected to and driven by the gear shift mechanism to make an axial movement. The speed changer realizes a gear shift via the axial movement of the sliding ring gear (6). The speed changer can change transmission ratios according to requirements of different functions, and function satisfactorily in a low speed high torque state and a high speed low torque state alike, thereby enabling a food processing apparatus to have multiple functions. Moreover, a gear shift function can be used when the food processing apparatus is in an ON state, thereby allowing a user to operate the food processing apparatus easily while reducing the time required for food processing.

Description

Transmission for food processing

Technical field

The invention belongs to the technical field of food processing equipment, and particularly relates to a transmission for food processing, which can be applied to the stirring or cutting of different materials according to the material and size of the transmission.

Background technique

With the increasing variety of materials that need to be processed in production and life, the requirements for food processing are getting higher and higher. The type, size and speed of the agitator have an effect on the distribution of the agitation power between the overall flow and the turbulent pulsation. For different dynamic viscosities between different materials, different rotation speeds are also required to achieve sufficient agitation. In addition, in order to adapt to different processing requirements for different materials, the processor also needs to have a shifting function.

Taking food processing as an example, the market demands for the function of the agitator is getting higher and higher, which requires the output end of the agitator (generally a moving part with a cutting or stirring function such as a blade, a cutter head, a stirring rod, a stirring piece, etc.). The operating speed is adjustable over a larger range. For example, when shredding/grinding with a blade, it is generally required that the rotation speed of the blade is about 10,000 rpm or higher; when cutting or slicing with a cutter head, the rotation speed is required to be several hundred to one or two thousand revolutions per minute; When kneading or making soup with a stir bar, the speed is required to be tens to two hundred revolutions per minute. At present, the products on the market can be roughly divided into three types: the first one is that the motor directly drives the working part, so that the transmission ratio is 1:1; the second is that the working part is driven by the motor through a gear or a belt, etc. The ratio is a single fixed; the third is a transmission mechanism with two or more sets of different gear ratios between the motor and the working part. Each set of transmissions has its fixed output, which is replaced by replacing different accessories. Different outputs are mated to achieve a change in gear ratio.

Analysis of the two extreme operating conditions of the agitator reveals that the shredder/grinding requires a very high rotational speed of the working part, which generally requires a blade speed of around 10,000 rpm or more. High, but at this time the torque requirement of the blade is very low, even if the motor does not decelerate through any transmission parts (increasing the output torque), the shredding/grinding work can be performed well. However, in the case of kneading, it is necessary to have a very large torque at the output end, and the rotation speed is only required to be tens of revolutions per minute. Because the general cooking machine can't reach the required torque, it can't realize the kneading function. If the user takes such a machine to knead the surface, the temperature of the motor will rise rapidly and the machine will burn out. If the automatic protection device of the machine is not designed properly, it may be There will be smoke and sparks and even fire. Low-speed cooking machines often only work in low-speed work such as kneading, and can't do the work of chopping or grinding.

The existing products generally have a fixed transmission ratio, and the operating speed of the output end is adjusted by adjusting the rotation speed of the motor. Some middle and high-end products also increase the closed-loop control circuit for the motor rotation speed to more accurately control the rotation speed within the required range. The adjustment of the motor speed is actually the adjustment of its input voltage. It is well known that the motors used in the agitator (mostly series or DC motors) are designed to rotate at speeds of several thousand to tens of thousands of revolutions per minute. When low speeds are required, the input voltage of the motor needs to be lowered. It is bound to greatly reduce the output torque of the motor. At present, the motors commonly used on the market cannot work stably at speeds of several tens of revolutions per minute. Even with the closed-loop control circuit, the motor cannot have a stable enough torque output at such a low speed. Therefore, the products of this fixed transmission ratio are all in this way, and it is difficult to achieve the best of both high and low speed.

The third product in the above example is more advanced on the market, but the serious shortage of this product is that it is necessary to replace different accessories to achieve the change of the transmission ratio, and it is very troublesome for the user to change the machine attachment during use. thing. For example, a recipe first chopped the ingredients at high speed and heated at a low speed. The user needs to empty the food in the mixing cup to replace the accessories, and then reload the previously chopped ingredients back into the container.

Summary of the invention

The object of the present invention is to provide a transmission and a variable speed food processor, which can change the transmission ratio according to the needs of different functions, and take into consideration two working states of low speed, large torque and high speed and small torque, and can be changed during the movement. The gear does not need to stop the transmission rotation for the switching operation state.

The technical solution adopted by the present invention to solve the technical problem thereof is:

A transmission includes a gearbox and a shifting mechanism, the gearbox includes a housing having a planet carrier, a planet gear, a sun gear, and a sliding ring gear, the sliding ring gear being coupled to the shifting mechanism, and being replaced The gear mechanism can move axially under the driving. The transmission shifts gears by axial movement of the sliding ring gear.

Further, the inner ring of the housing has a fixed stop ring; the outer ring of the sliding ring gear has a sliding stop ring, and the sun wheel is provided with a rotating stop ring. The stop ring is used to achieve a snap or stop between each other.

Further, when the sliding ring gear moves to the housing, the sliding stopping ring can have no relative movement with the fixed stopping ring; when the sliding ring gear moves to the sun gear, the sliding stopping ring can have no relative movement with the rotating stopping ring. Since the fixed stop ring is fixed on the housing, the rotation stop ring is continuously rotated on the sun wheel, and the sliding stop ring is relatively stationary with the housing or the sun gear, thereby changing the transmission ratio.

Further, the sliding stop ring has sliding teeth that are evenly distributed and have a tooth pitch of at least 3 tooth widths. The sliding stop ring needs to be engaged with the fixed stopping ring and the rotating stopping ring. When the tooth is continuous, the movement of the planetary wheel must be stopped to perform the shifting. The design of the present invention can directly shift and slide. The larger the pitch of the stop ring, the higher the shifting efficiency, which solves the problem that the shift must be stopped.

Further, the fixed stop ring has fixed teeth that are evenly distributed and have a tooth pitch of at least 3 tooth widths. While the sliding stop ring is set with a large pitch, the fixed stop ring is also provided with a large pitch to improve the effectiveness of the start-up shift.

Further, the rotation stop ring has sliding teeth evenly distributed and having a tooth pitch of at least 3 tooth widths. While the sliding stop ring is set with a large pitch, the fixed stop ring is also provided with a large pitch to improve the effectiveness of the start-up shift.

Further, the fixed stopping ring is a fixed stopping surface; the sliding stopping ring is a sliding stopping surface; and the rotating stopping ring is a rotation stopping surface. The retaining ring can also be designed as a tapered ring, and the contact surface between them is a sloped surface, and the change of the moving state of the sliding ring gear and the change of the transmission ratio are realized by the pressure of the shifting mechanism.

Further, the fixed stop surface, the sliding stop surface and the rotation stop surface are all rubber materials. Increase friction.

Further, the sliding ring gear is annular and fits on the outer side of the planet gear; the inner ring of the sliding ring gear is matched with the planetary gear; the first gear is arranged on the sun gear, and the first gear is matched with the planetary gear.

Further, the shifter includes a shifting motor, a shifting arm and a shifting fork, and the shifting fork is disposed in the housing; the shifting motor drives the shifting arm, and the shifting arm is connected to the shifting fork.

The shifting mechanism further includes a gear position detecting switch, the end of the shift arm is in contact with the gear position detecting switch, the gear position detecting switch is connected to the controller, and the gear position detecting switch transmits the gear position information of the shift arm to the controller.

Since the working speed of the blade or the like is required to be adjusted from tens of thousands to tens of thousands of revolutions, in two extreme states, low speed, high torque and high speed and small torque, the single fixed ratio transmission mechanism can only be lost. When the transmission is relatively low, it can meet the high speed working condition and achieve better shredding effect, but the torque can not meet the requirements at low speed; when the transmission ratio is relatively high, it can meet the high torque output at low speed. However, it is impossible to achieve the high speed required for shredding. The gear ratio of the agitator proposed by the present invention can be automatically switched according to different functions selected by the user. At low speeds, the large gear ratio is used to increase the torque. At high speeds, the small gear ratio is used to increase the speed, so that the two extremes of low speed, high torque and high torque and low torque can be achieved.

In order to achieve a blade or similar working parts, it can be in the range of tens of thousands to tens of revolutions per minute. Working, a variable ratio transmission is arranged between the motor and the working end. When the user selects different functions, the control circuit automatically switches to the appropriate gear according to the program setting, thereby obtaining the best power output. For example, when high speed shredding is required, the transmission is switched to the gear of the lower gear ratio to obtain higher speed; when low speed and high torque operation is required, such as kneading, the transmission is switched to the high gear ratio and the output speed is reduced. At the same time increase the output torque. When switching the transmission ratio, the user does not need to replace any accessories, even without stopping the machine. It can shift directly to high speed operation in low speed operation or shift to low speed operation in high speed operation. When the sun gear is used as the driving wheel, the inner ring gear is fixed, and the carrier is output, the transmission is in a large gear ratio state; when the sun gear, the inner ring gear and the carrier are fixed together, the transmission is switched to the small gear ratio state.

The beneficial effects of the invention are:

(1) The transmission can change the transmission ratio according to the needs of different functions, taking into account the two working states of low speed, large torque and high speed and small torque, so that the food processing equipment can be used more.

(2) The shifting function can be used in the power-on state, which makes the user's operation easier and reduces the time of food processing;

(3) The invention can be applied to various food processor with adjustable working speed, including but not limited to: mixer, juicer, kitchen cooking machine, kneading machine, coffee bean grinder, garbage disposer, small Industrial mixers, etc.;

(4) Depending on the structure of the device, the transmission of the present invention can be adapted to various installation modes, for example, it can be installed coaxially with the motor, or can be driven by a belt or a gear, and can also be moved according to the working part. Required, horizontal or vertical arrangement;

(5) The design scheme of using the rubber stop surface can effectively avoid the loss between the parts while avoiding the loss of the power-on shifting, saving cost and prolonging the service life.

DRAWINGS

Figure 1 is a schematic exploded view of a first embodiment of a transmission;

Figure 2 is a schematic view of a low speed state of the transmission embodiment;

Figure 3 is a schematic view of a high speed state of a transmission embodiment;

Figure 4 is a schematic view of the low speed state of the second embodiment of the transmission;

Figure 5 is a schematic view of a high speed state of the second embodiment of the transmission;

Figure 6 is a schematic diagram of the principle of the transmission low speed state;

Figure 7 is a schematic diagram of the transmission speed state state;

Among them: 1. housing, 101. fixed teeth, 102. fixed stop surface, 2. planet carrier bearing, 3. planet carrier, 4. planetary gear, 5. shift fork, 501. bump, 502. concave Slot, 6. Sliding ring gear, 601. Sliding tooth, 602. Sliding stop surface, 7. Center shaft, 8. Sun gear, 801. Rotating tooth, 802. Rotating stop surface, 803. First gear, 9. Shift motor, 901. Guide groove, 902. Gear, 903. Rack, 10. Shift arm, 11. Gear switch.

detailed description

In order to make the technical means, the creative features, the achievement of the objects and the effects of the present invention easy to understand, the present invention will be further described below in conjunction with the specific embodiments.

Embodiment 1:

As shown in FIG. 1 , a first embodiment of the present invention provides a transmission including a gearbox and a shifter. The gearbox includes a housing 1. The housing 1 is provided with a carrier 3, a sliding ring gear 6 and a sun gear 8 . .

The inner ring of the casing 1 has six fixed teeth 101 uniformly distributed, and the pitch formed between the adjacent two fixed teeth 101 is at least the width of the three fixed teeth 101.

The carrier 3 has three brackets on one side, each with an identical planet gear 4; the other side of the planet carrier 3 is equipped with a planet carrier bearing 2 for supporting and protecting the planet carrier 3, and the planet carrier 3 passes The carrier 2 is connected to the housing 1.

The sliding ring gear 6 is annular and is fitted outside the three planetary gears 4. The inner ring of the sliding ring gear 6 has uniform and continuous internal teeth which are adapted to the planet gears 4. The outer ring of the sliding ring gear 6 has eight sliding teeth 601, and the distance between the adjacent two sliding teeth 601 is at least the width of three sliding teeth 601. The sliding tooth 601 is engageable with the fixed tooth 101 of the inner ring of the housing 1. The outer side of the sliding ring gear 6 has an annular flange.

The sun gear 8 has a first gear 803 and a secondary gear. The first gear 803 is located inside the three planetary gears 4, and the gear teeth are matched with the planetary gears 4. The secondary gears are provided with eight rotating teeth uniformly distributed. 801, a distance formed between adjacent two rotating teeth 801 is at least a width of three sliding rotating teeth 801. The rotating tooth 801 is engageable with the sliding tooth 601 of the outer ring of the sliding ring gear 6. The secondary gear in this embodiment is composed of a plurality of protrusions disposed on the outer ring of the bottom of the sun gear 8, that is, a plurality of rotating teeth 801, and may also be designed as an annular secondary gear, and is evenly distributed inside the secondary gear. 8 rotating teeth 801.

The shifter includes a shifting motor 9, a shifting arm 10, and a shifting fork 5, the shifting motor 9 is powered by the shifting arm 10, and the shifting arm 10 is connected to the shifting fork 5. In this embodiment, the shift fork 5 is disposed in the housing 1 and vertically movable in the housing 1. The shift fork 5 has a protrusion 501, and the shift arm 10 has a guiding slot 901 therein. The shifting arm 501 extends into the guiding slot 901, so that the shifting arm 10 drives the shifting fork 5 to move, and the shifting fork 5 and the sliding ring gear 6 respectively have a snapping structure, and during the shifting process, the shifting arm The lateral movement of 10 can drive the shift fork 5 to move longitudinally, thereby causing the sliding ring gear 6 to move to complete the shift. At the same time, the movement of the shift arm 10 will trigger the gear position switch 11. The gear position switch 11 is used to provide the controller with the status of the gear position in which the transmission is located, while providing the controller with a signal to complete the shift during the shifting process. It should be noted that how the shifting motor 9 drives the shifting arm 10 to move, and the structure of the shifting arm 10 can also adopt other technical solutions according to the needs of the actual application, without affecting the implementation and protection scope of the present invention.

In addition, the number of the fixed teeth 101, the sliding teeth 601, and the rotating teeth 801 can be used according to actual use. At least one, three, five, six, etc. are the scope of the technical solution.

The working principle of this embodiment is as follows:

As shown in Fig. 6 and Fig. 7, in the figure, A/A' is the sun gear, B is the planetary gear, C/C' is the sliding ring gear, D is the ring composed of several fixed teeth, H is the planet carrier, and the sun gear is a double gear, as the input end of the gearbox, the planet carrier serves as an output end, and the sliding ring gear can slide axially under the action of the shifting mechanism;

In Fig. 6, at the low speed, the sliding ring gear is on the right side, and the outer teeth C', that is, the sliding teeth and the fixed teeth D are meshed, and the fixed teeth D and the gear case are integrated, so the sliding ring gear is fixed by the ring gear. Locked, the transmission mode at this time is that the sun gear is used as the driving wheel, the sliding ring gear is fixed, the carrier is output, and the gearbox is in the deceleration output, that is, the large transmission ratio state;

In Fig. 7, in the high gear, the sliding ring gear is on the left side, and the outer teeth C' are disengaged from the fixed ring gear D. The internal teeth C of the sliding ring gear are engaged with the planetary gears and also on the double sun gear. The secondary gear A' is engaged. At this time, the sun gear, the sliding ring gear and the carrier are fixed in one body, and the relative rotation cannot be generated. The transmission ratio of the transmission is 1, that is, the small transmission ratio state.

The sun gear 8 used in the transmission of the present invention is a double gear, and a pulley can be disposed at the bottom. According to different processes, the double gear and the pulley can be integrated or assembled into separate parts. The sun gear 8 primary gear 803 is a sun gear in the planetary gear mechanism, and the secondary gear is used to lock the sliding ring gear 6 circumferentially in the high speed range so that it can only rotate in synchronization with the sun gear 8.

As shown in FIG. 1 , the sliding ring gear 6 has a ring flange on the periphery thereof, and the shift fork 5 corresponding thereto has a groove 502 (of course, the groove can be grooved on the ring gear, and the flange is arranged on the fork ring. ). The sliding ring gear 6 is axially movable under the drive of the shift fork 5, and the shift fork 5 is fixed to the individual 1 and only constrains the axial movement of the sliding ring gear 6 without affecting the ring gear rotation.

As shown in FIG. 2, in the low speed range, the sliding ring gear 6 moves away from the sun gear 8, and The internal teeth mesh with the planetary gears 4, and the sliding teeth 801 are engaged with the fixed teeth 101 on the housing 1, and both the axial direction and the radial direction of the sliding ring gear 6 are fixed and cannot move.

As shown in FIG. 3, in the high speed range, the sliding ring gear 6 moves in the direction of approaching the sun gear 8, the sliding teeth 801 are disengaged from the fixed teeth 101 on the casing 1, the internal teeth mesh with the planetary gear 4, the sliding teeth 801 and The rotating teeth 801 of the sun gear 8 are engaged, and at this time, the sliding ring gear 6 locks the sun gear 8 and the planetary gear 4 into one body, and the three can only rotate synchronously as a whole.

Since the fixed tooth 101, the sliding tooth 801 and the rotating tooth 801 all adopt a design with a large pitch, when the high speed and low speed are switched, there is no need to stop the transmission, and only the shifting mechanism is directly moved to move the sliding ring gear 6 Shift shifting is achieved at the specified position, although an action delay in the range of the pitch is generated, but does not affect the normal shifting of the transmission. The problem with this embodiment is that there is a 2% possibility of shifting the jam, that is, when the sliding ring gear 6 is moved up or down, the sliding teeth 801 just coincide with the fixed teeth 101 or the rotating teeth 801.

The shifting arm 10 is driven by a shifting motor 9. The shifting motor is a DC motor with a reduction gearbox, the output end is a gear 902, the gear 902 is meshed with a rack 903, and the rack 903 is connected to the shifting arm 10, The shift of the shifting motor 9 is changed by the controller to achieve switching between high and low gears.

Embodiment 2:

As shown in FIGS. 4 and 5, the second embodiment of the present invention provides another transmission including a gearbox and a shifter. The gearbox includes a housing 1, a housing 1 is provided with a carrier 3, a sliding ring gear 6 and Sun wheel 8.

The inner ring of the housing 1 has a fixed stop surface 102, and the fixed stop surface 102 is inclined inward, that is, the circumference of the upper ring is smaller than the circumference of the lower ring.

The two planet carriers 3 have three brackets on one side, each with an identical planet gear 4; the other side of the planet carrier 3 is equipped with planet carrier bearings 2 for supporting and protecting the planet carrier 3, planet carrier 3 The housing 1 is connected by a carrier 2 .

The sliding ring gear 6 is annular and is fitted outside the three planetary gears 4. The inner ring of the sliding ring gear 6 has uniform and continuous internal teeth which are adapted to the planet gears 4. An annular flange is provided on the outer side of the sliding ring gear 6. The outer ring of the sliding ring gear 6 has a sliding stop surface 602, and the sliding stop surface 602 above the flange is inclined inward, that is, the circumference of the upper ring is smaller than the circumference of the lower ring; the sliding stop surface 602 below the flange is inclined outward That is, the circumference of the upper circle is larger than the circumference of the lower circle. The upper and lower portions of the sliding stop surface 602 form an outward projection at the flange. The sliding stop surface 602 of the upper portion of the sliding ring gear 6 can completely correspond to the fixed stopping surface 102.

The sun gear 8 has a first gear 803 and a rotation stop surface 802. The first gear 803 is located inside the three planetary gears 4, and its teeth are matched with the planetary gears 4; the rotation stop surface 802 can be combined with the sliding ring gear 6. The lower sliding stop faces 602 are completely aligned.

The fixed stop surface 102, the sliding stop surface 602, and the rotation stop surface 802 are all rubber-like materials that can increase friction.

Other technical features are the same as in the first embodiment.

The working principle of this embodiment is as follows:

In combination with the working principle of the first embodiment, the present embodiment is improved by using a fixed stopping surface 102, a sliding stopping surface 602, and a rotating stopping surface 802 instead of the fixed tooth 101, the sliding tooth 601 and the rotating tooth 801. The sliding ring gear 6 is pressed against the fixed stop surface 102 or the rotation stop surface 802 by the shift arm 10, and the friction force is increased by the pressure, so that the sliding ring gear 6 is fixed relative to the fixed stop surface 102 or the rotation stop surface. 802 is still.

As shown in FIG. 4, in the low speed range, the sliding ring gear 6 moves away from the sun gear 8, the internal teeth mesh with the planetary gear 4, and the sliding stop surface 802 and the fixed stop surface 102 on the casing 1 are pressed. The axial and radial directions of the sliding ring gear 6 are fixed and cannot move.

As shown in FIG. 5, in the high speed range, the sliding ring gear 6 moves toward the sun gear 8, and The sliding stop surface 802 is disengaged from the fixed stop surface 102 on the housing 1, the internal teeth mesh with the planetary gear 4, and the sliding stop surface 802 and the rotation stop surface 802 on the sun gear 8 are pressed. 6 The sun gear 8 and the planet gear 4 are locked into one body, and the three can only rotate synchronously as a whole.

The beneficial effect of the embodiment is that not only does the transmission need not be stopped when shifting, but also the situation that the shifting of the high-speed gear to the low-speed gear or the low-speed gear to the high-speed gear can be free. Shifting, reducing the wear between the gears, the rubber stop surface is easy to produce and replace, the cost is small, and the use is convenient.

The following is the transmission ratio under different working conditions of the design:

The following are the speed and gear ratio status of each gear when designing for the food processor: (for example only, the actual application can be adjusted according to the actual situation)

The power source for the multi-function food processor in this example is a series motor with a maximum operating speed of 20,000 rpm, which is used to detect and control the motor speed in conjunction with a closed-loop control circuit such as a Hall element or a grating to detect motor speed. A total of 10 working gears are set at the working output. The 10 output gears are divided into two sections, which correspond to the high speed and low speed of the gearbox respectively. The control circuit will switch the gearbox according to the gear position selected by the user. When the gear is working in the same section, the gearbox does not shift gears, and the gearbox will only shift gears when the user shifts across the zone.

As can be seen from the above table, in the first gear, the output speed of the working end is 60 rpm. If there is no gearbox, the ordinary series motor or DC motor can no longer work stably at such low speed. In this example, due to the speed reduction mechanism with a transmission ratio of 9.2, the working speed of the motor is increased to 552 rpm, and the torque of the motor is amplified by up to 9 times, so that the motor can not only work stably, but also has sufficient torque at the output end. Complete high load work such as stirring.

In 10th gear, the output speed of the working end is 8500rpm, the total gear ratio is switched to 2.3, and the motor speed is 19550rpm, which is mainly used for shredding or mixing, which requires high speed.

This fully embodies the role of the variable transmission ratio in practical applications, so that the machine can take into account the two extreme working states of low speed and high torque and high speed and small torque.

The basic principles, main features, and advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, and that the present invention is described in the foregoing description and the description of the present invention. Such changes and modifications are intended to fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and their equivalents.

Claims

A transmission for food processing, comprising a gearbox and a shifting mechanism, characterized in that the gearbox comprises a casing (1), and a carrier (3) and a planet gear (4) are arranged in the casing (1) ), the sun gear (8) and the sliding ring gear (6), the sliding ring gear (6) is connected to the shifting mechanism and is axially movable by the shifting mechanism.
The transmission according to claim 1, characterized in that the inner ring of the casing (1) has a fixed retaining ring; the outer ring of the sliding ring gear (6) has a sliding stop ring (601, 602), the sun A rotating stop ring (801, 802) is provided on the wheel (8).
The transmission according to claim 1, characterized in that, when the sliding ring gear (6) is moved to the casing (1), the sliding stop ring (601, 602) is capable of no relative movement with the fixed stopping ring; the sliding ring gear (6) When moving to the sun gear (8), the sliding stop rings (601, 602) can move without relative movement with the rotation stop rings (801, 802).
The transmission of claim 2 wherein the sliding stop ring has sliding teeth (601) that are evenly distributed and have a pitch of at least three teeth.
The transmission according to claim 4, characterized in that the fixed stop ring has fixed teeth (101) which are evenly distributed and have a tooth pitch of at least 3 tooth widths.
The transmission according to claim 4, characterized in that the rotation stop ring has a rotating tooth (801) which is evenly distributed and has a tooth pitch of at least 3 tooth widths.
The transmission according to claim 2, wherein said fixed retaining ring is a fixed stop surface (102); said sliding stop ring is a sliding stop surface (602); said rotation stop The moving coil is a rotating stop surface (802).
The transmission according to claim 7, wherein said fixed stop surface (102), sliding stop surface (602), and rotation stop surface (802) are both rubber materials.
A transmission according to any of claims 1-8, wherein the sliding ring gear (6) It is ring-shaped and fits on the outer side of the planetary gear (4); the internal gear of the sliding ring gear (6) is matched with the planetary gear (4); the first gear (803) is provided on the sun gear (8), and the primary gear (803) Fits to the planet wheel (4).
A transmission according to any of claims 1-8, characterized in that the shifter comprises a shifting motor (9), a shifting arm (10) and a shifting fork (5), a shifting fork (5) It is disposed in the casing (1); the shifting motor (9) drives the shifting arm (10), and the shifting arm (10) is connected to the shifting fork (5).