KR0168746B1 - Food mixer - Google Patents

Abstract

The present invention discloses a gear shift adjusting device of a food stirrer to adjust the rotation speed of the stirring shaft properly according to the stirring degree of the stirring material, the present invention is installed through the gear box and the gear box, but the shift operation from the outside This possible retained control shaft, the pinion is inserted on the control shaft and the pinion is selectively forced to rotate by the coaxial operation pin when shifting, and one end is the main surface of the support tube to control the rotational force of the pinion A rotation control plate which is supported by a spring in the spring, and the shifting arm, which is engaged with the pinion so as to be linearly movable around the guide shaft installed alternately with the control shaft, and is welded so that a semicircle request is positioned on the same line at one end thereof; In accordance with the operation of the drive motor around the main shaft that is rotated by the power to the left and right to be movable is condensed Rotating operation tool is provided with a plurality of protrusion pieces, and the driving gears are formed so as to correspond to the engaging pieces and the projection pieces when shifting the rotation operation tool is installed in the idle state on the main shaft by varying the pitch circle diameter and the The drive gear on the main shaft is composed of a driven shaft that links the stirring shaft while shifting rotation by the driving force of the equivalent gears in which the pitch circle diameters are conversed in the opposite direction. This prevents the maintenance and easy to have the effect of preventing noise due to shifting.

Description

Gear shift adjusting device of food stirrer

1 is a perspective view of an example of a food stirrer equipped with a gear transmission of the present invention.

Figure 2 is an exploded perspective view of the main portion of the shift control apparatus according to the present invention.

3 is an enlarged excerpt sectional view showing the rotation control state of the pinion according to the present invention.

Figure 4 is a plan view of the shift adjustment case for guiding the gear shift position adjustment state according to the present invention.

5 is a cross sectional plan view of FIG.

6 is an assembled front cross-sectional view of FIG.

* Explanation of symbols for the main parts of the drawings

1: food stirrer 6: driving motor

11: stirring shaft 13: gear shift position selection means

14: adjusting shaft 15, 18: first and second pinion

16, 19: support body 16a, 19a: groove

21, 22: first and second operation pin 23a, 23b: rotation control pin

24: support bar 26a, 26b: spring

28a, 28b: guide shafts 30a, 30b: first and second racks

31, 32: 1st and 2nd transmission arm 31a, 32a: semi-circle request

34: shift control case 36, 37, 38, 39: the first to fourth shift groove

40: shift position guide pin 41: shift gear means

42: main shaft 43, 45: first and second rotation control zone

44a, 44b, 46a, 46b: protrusions

48, 49, 50, 51: 1st to 4th drive gear

48a, 49a, 50a, 51a: locking piece 53: driven shaft

54, 55, 56, 57: 1st to 4th driven gear

The present invention relates to a gear shift adjusting device of a food stirrer, which is capable of appropriately adjusting or adjusting the rotation speed of the stirring shaft according to the stirring degree of the stirring material, and more specifically, the first-speed driven gear of the driven shaft to rotate the stirring shaft. The first to fourth speed gears on the drive shaft installed to engage with the four speed driven gears are idled at no speed, and the gears are coaxially locked to each other when the gears are coaxially locked. The present invention relates to a gear shift adjusting device for a food stirrer that can be easily rotated by driving a corresponding gear on a driven shaft engaged therewith, thereby facilitating a gear shift operation.

In general, it is very preferable that the food stirrer controls the stirring shaft in which predetermined stirring mechanisms are selectively detached and eccentrically rotated in order to achieve the best stirring state according to the contents of the stirring material contained in the stirring vessel.

In view of this point, a gear shift device capable of appropriately adjusting the speed ratio of the stirring shaft has been proposed in Patent Application No. 95-32445, filed by the applicant of the present application. Each sliding gear is selectively engaged with the gears on the driven shaft by adjusting the adjusting shaft, so that the stirring shaft can be driven at an appropriate speed ratio by inducing a gear shift without stopping the driving motor during the stirring operation.

However, since the above-mentioned application is engaged with the corresponding gears on the driven shaft while the sliding gears of the first and second speeds and the third and fourth speeds are always rotated. If the gears are not correctly engaged in the process of being engaged with the gears on the driven shaft, there is a problem that the wear of the gears is caused by the friction of the gears. As a result, the smooth gear shifting operation could not be performed, resulting in shortening of the life of the machine and an increase in maintenance and management costs.

Accordingly, the present invention is to solve the problems caused by the gear shift of such a prior application, the object of the present invention is to prevent the wear phenomenon of each gear during shifting, as well as to extend the life and maintenance and easy to generate noise due to the shift operation It is to provide a gear shift control device of a food stirrer so that the shift operation can be performed smoothly without a shift.

Features of the gear shift control device of the present invention for achieving the above object is inserted into the gear box, the control shaft is installed through the gear box to allow the shift operation from the outside, and by the coaxial operation pin when shifting A pinion to which the grooves are selectively walked and forced to rotate, a rotation control pin having one end supported by a spring on the main surface of the support tube to control the rotational force of the pinion, and a guide shaft alternately installed with the adjustment shaft. It is engaged with the pinion so as to be able to move in a straight line, and it is possible to move left and right around the main shaft which is rotated by the power of the drive motor according to the operation of the transmission arm and the transmission arm welded so that the semicircle request is located in the same line. A rotation control tool which is squeezed and provided with a plurality of protruding pieces on both sides, and is interlocked with the protruding piece when shifting the rotation control tool. The gears are formed to correspond to each other, and the gears are formed to correspond to each other, and the gears are installed in the idle state on the main shaft and the gears of the driven gears are pitched in the opposite direction to the drive gears on the main shaft. It is in the point which consists of a driven shaft which interlocks a stirring shaft.

According to the present invention, the gear shift adjusting device is provided on the outside of the gearbox coaxially with the adjusting shaft, and has a shift adjusting case for guiding gear shifts with shifting grooves through which shift guide pins are guided.

Hereinafter, described in detail with reference to the accompanying drawings, an embodiment of the gear shift adjusting apparatus of the food stirrer according to the present invention.

1 is a partial cutaway perspective view schematically showing an example of a food stirrer 1 equipped with a gear shift adjusting device according to the present invention. The food stirrer 1 includes a base 2 and a body 3. ), The upper case 4 and one side of the upper case 4 are provided with a safety cover 5 that can be opened and closed, and the timing at which the shaft end of the drive motor 6 is condensed into the safety cover 5. Another large diameter timing pulley 8 and a timing belt 9 connected therebetween for driving the pulley 7 and the main shaft 42 built up in the gearbox 2 of the gear shift adjusting apparatus described later. This is implied. And the front of the body 3 is provided with a container support 10 for supporting the stirring vessel for holding the stirring material not shown in the drawings, the upper and lower movement adjustable according to the handle operation, not shown One side of the upper case (4) located in the lower side is driven to the driven shaft 53 and the stirring shaft (11) connected and driven eccentrically, this end of the stirring shaft (11) depending on the type of stirring Stirring mechanisms (not shown in the figures) for stirring are selectively removed.

On the other hand, inside the upper case 4, a box-shaped gearbox (12) with a gear shift control device for adjusting the rotation speed of the stirring shaft (11) according to the operation of the control lever (14a) installed on one side outward ) Is installed detachably.

In addition, the gear shift adjusting apparatus according to the present invention has a gear shift position selection adjusting means 13 capable of easily selecting and adjusting a gear shift position largely, and a speed ratio selectively adjusted by the means on the stirring shaft 11. Consisting of the transmission gear means 41 for transmission, the above-described means will be described in more detail with reference to Figs.

Figure 2 shows a perspective view of the main portion of the gear shift control apparatus according to the present invention, Figure 3 and Figure 4 shows the assembled cross-sectional view and side cross-sectional view of the gear shift control device, respectively. As shown in FIG. 2 and FIG. 3, the gear shift position selection adjusting means 13 has the adjustment shaft 14 of the gearbox 12 so as to be moved forward and backward according to the operation of the adjustment lever 14a. The first and second pinions 15 having a predetermined size are installed through the central shaft to the upper end of the upper case (4) in one end and the control shaft 14 located in the gear box 12 ( 18 are respectively rotatably arranged. The outer sides of each of the pinions 15 and 18 are integrally welded to the other end of the support tubes 16 and 19 having grooves 16a and 19a formed at one end thereof, and the support tubes 16 ( The grooves 16a and 19a of the 19 are selectively fitted with the first and second operation pins 21 and 22 correspondingly installed on the adjustment shaft 14 during shift adjustment of the adjustment lever 14a. In the shifting operation, the first operation pin 21 is selectively fitted into the groove 16a of the first pinion 15, and the second operation pin 22 is selectively fitted into the groove 19a of the second pinion 18, respectively. (15) (18) is forcibly rotated.

On the other hand, the outer peripheral surface of each of the support tubes 16, 19 of the first and second pinions 15, 18, which are rotatably inserted on the adjustment shaft 14, the rotation control pins 23a, 23b during rotation. The first, second, and third stop grooves 17a, 17b, 17c, 20a, 20b, and 20c of the concave shape to which the) is in contact with each other are formed at predetermined intervals. Each of the stop grooves 17a, 17b, 17c, 20a, 20b, and 20c is set in consideration of the shift movement distance of the pivoting operation tool 43, 45 described later, for example, the first stop groove. If the rotation control pins 23a and 23b are positioned in the 17a and 20a, they are in a neutral state, and are located in the second stop grooves 19b and 20b and the third stop grooves 17c and 20c, respectively. The first stage and the third stage, or the second stage and the fourth stage is a state in which the shift is completed.

That is, as shown in FIG. 5, each of the stop grooves 17a formed on the outer circumferential surface of each of the support tubes 16 and 19 (only the support tubes 16 welded to the first pinion 15 are shown in the drawing). The rotary control pins 23a and 23b, each of which has a spherical shape at the end, are in contact with each other (17b) and 17c, and the rotational control pins 23a and 23b are geared in parallel with the adjustment shaft 14. One side of the box 12 is inserted into each of the connecting pipes 25a and 25b, one side of which is welded to the support bar 24 on which both ends are fixed or welded to each other by bolts or the like, and inside the connecting pipes 25a and 25b. Each rotating stop pin 23a, 23b is interposed with springs 26a and 26b interposed, and the springs 26a and 26b are adjusted by the bolts 27a and 27b. The first pinion (15) 18 and the second pinion (18) in the rotational operation of each support tube 16, 19 is to be able to always be in close contact with the appropriate pressure.

Therefore, each pinion (15) (18) is the rotation control pins (23a) (23b) when rotating the respective stop grooves (17a) (17b) (17c) (20a) and (20b) of these support bodies (16) (19). (C) is always in close contact with the proper elasticity, the rotational state is also forced by the rotation operation of the control shaft 14, for example, the first pinion (15) by the control shaft (14) In case of forced rotation, another second pinion 18, which is coaxially inserted, is rotated together with the adjusting shaft 14 because the pivoting control pin 23b pushes its support body 19 elastically. It will not be possible to achieve a more reliable shift operation.

Further, in each of the face adjustment stop grooves 17a, 17b, 17c, 20a, 20b, and 20c in which the rotation control pins 23a and 23b are in contact with each other, the first stop groove ( 17a) and 20a are neutral positions during the shift operation of the adjustment shaft 14, in which the grooves 16a and 19a of the support tubes 16 and 19 formed in the respective pinions 15 and 18 are adjusted. (14) The first and second operating pins 21 and 22 are positioned in a state in which they are coincident with each other so that each of the operating pins 21 and 22 can be easily fitted into the grooves 16a and 19a, respectively. The rotation stop pins 23a and 23b are positioned so that the second and third stop grooves 17b, 20b, 17c, and 20c formed on both sides thereof may be formed by the operation pins 21 and 22, respectively. The rotation control pins 23a and 23b are respectively positioned and supported when the pinions 15 and 18 are shifted to the selected shift position as described above.

On the other hand, as shown in Figure 2, the lower end of the control shaft 14, a pair of ride shafts (28a, 28b) in the state of the gear box 12 in an alternating state with the control shaft 14, both ends of the known fixed bolt It is fixedly installed by means, and the guide tubes 29a and 29b of a predetermined length are inserted into the guide shafts 28a and 28b so as to be movable left and right, respectively, and are adjusted to the inner peripheral surface. The first and second racks 30a, 30b meshed with the pinions 15, 18 on the shaft 14 are attached to each other in a horizontal state. The first and second transmission arms 31 and 32 each having semicircular demands 31a and 32b formed at the lower center of one end of each of the racks 30a and 30b and the guide tubes 29a and 29b. The semicircular demands 31a and 32a formed on each of the transmission arms 31 and 32 are welded and fixedly installed in the state of being penetrated on the guide shafts 28a and 28b. The other end portion which is positioned on the same line and penetrated through the guide shafts 28a and 28b is cut to be positioned at the lower end of each of the legs 30a and 30b and is formed so as not to interfere with each other during movement. Further, at both ends of the guide shafts 28a and 28b, the moving stop pieces 33a and 33b are provided at predetermined points to limit the moving distances of the shift arms 31 and 32, respectively. In addition, the shift shaft case 34 is attached to the outer circumferential wall of the gear box 12 in which the adjustment shaft 14 is installed, as shown in FIG. 4, which will be described in more detail with reference to FIG. 5. That is, as shown in FIG. 5, the first to fourth transmission grooves 36, 37, 38, and 39 are respectively formed around the separation piece 35 having the guide groove 35a formed at the center thereof. In addition, one shift position guide pin 40 protrudes as a control shaft 14 penetrated to this part to guide the shift state more reliably using the control lever 14a fixed to the end.

On the other hand, when the shift position guide pin 40 in the shift control case 34 is in the first speed shift groove 36, the gear bites of the gear shift control means 41 to be described later represent a minimum speed state, and the second When it is in the shift groove 37, it indicates a medium low speed state, when it is in the 3rd speed shift groove 38, it shows a medium speed state, and when it is located in the 4th speed shift groove 39, it shows a highest speed state, respectively. .

In addition, since the shift control case 34 is installed on the outer side of the gear box 12 coaxially with the adjusting shaft 14, and the gear box 12 is built in the upper case 4, the assembly is completed. The operator can easily grasp the shift control state of the control shaft 14 with respect to the shift control case 34 to the outer wall surface of the upper case 4 in which the shift lever 14a is installed, because the operator cannot see it from the outside. It is highly desirable to attach and install a display panel such as an operation sticker on which a shift position seat is drawn.

As shown in FIG. 2, the main shaft 42 of the transmission gear means 41 is rotated by the power of the drive motor 6, as shown in FIG. 1. The main shaft 42 on both sides of the main shaft 42 First and second pivotal operation tools 43 and 45 in which the pair of protruding pieces 44a, 44b, 46a and 46b are integrally protruded are respectively penetrated at predetermined positions.

At this time, each of the rotation operation tools (43, 45) can be rotated together by the sliding keys (47a, 47b), the first and the first in the circular locking demand 43a (45a) formed in the center portion 2 Semicircle demands 31a and 32a of the shifting arms 31 and 32 are inserted, respectively, but each pivoting operation tool 43 and 45 is rotated without any interference with the main shaft 42 and the shifting arm 31 It can be freely adjusted to move to the selected position by the operation of (32).

Between the first and second rotational operation tools 43 and 45 on the main shaft 42, the first to fourth speed drive gears 48, 49, 50 (which vary in pitch circle diameter) 51 are sequentially penetrated at predetermined positions, and these driving gears 48, 49, 50, and 51 are fixed to both sides by snap rings 52a and 52b, respectively, so that they do not flow from side to side. And is simply penetrated on the main shaft 42 to have no rotational force with respect to the main driving side 42 by itself, and to the side surfaces of the respective driving gears 48, 49, 50, 51. Is formed integrally with the engaging pieces 48a, 49a, 50a, 51a at positions corresponding to the protruding pieces 44a, 44b, 46a, 46b formed on the pivoting operation tool 43, 45, respectively. Thus, when gear shifting operations, they are alternately picked up and driven.

On the other hand, on the driven shaft 53, which is rolled side by side with the main shaft 42, the pitch circle diameters are arranged opposite to each other with the drive gears 48, 49, 50, 51 of the main shaft 42 described above. The first to fourth driven gears 54, 55, 56 and 57 are configured to rotate together with the driven shaft 53.

Therefore, the respective drive gears 48, 49, 50 and 51 on the main shaft 42 are meshed with the respective drive gears 54, 55, 56 and 57 on the driven shaft 53. However, since the main shaft 42 does not have any rotational force at the time of rotation, when the shift adjustment is forcibly rotated only by the locking wall of the pivoting operation tool 43, 45, the driven gear is driven. Drive gears that do not have a gear is simply idling on the main shaft 42 in a state of being engaged with the driven gear.

In addition, the first speed drive gear 48 of the main shaft 42 according to the present invention and the first speed drive gear 48 having the smallest pitch circle diameter are relatively the first speed driven gear 54 of the driven shaft 53 having the largest pitch circle diameter. When it is driven, it is in the lowest speed state, and when the second speed drive gear 490 and the second speed driven gear 55 are driven, it is in the middle low speed state, and the third speed drive gear 50 and the third speed driven gear are driven. When 56 is driven, it is in a high speed state, and when the fourth speed drive gear 51 with the largest pitch circle diameter is driven and the fourth speed driven gear 57 with the smallest pitch circle diameter is driven, it is extremely high speed. It will show status.

The operation state of the gear shift adjusting apparatus of the present invention configured as described above will be described with reference to FIGS. 5 and 6. That is, in the case where the stirring shaft 11 is to be shifted to the minimum speed or the medium to low speed state, first, the control shaft 14 is pushed in the direction of the arrow A as shown in FIG. ) Is moved through the guide groove 35a of the separating piece 35 of the shift control case 34 to a low speed neutral position (located at the front center in the drawing) and at the same time, the first operation pin 21 moves to the first pinion. It fits in the groove 16a recessed in the support body 16 of (15), and is caught.

Then, by rotating the adjusting shaft 14 clockwise or counterclockwise as shown in FIG. 6 using the adjusting lever 14a, the first pinion 15 caught by the first operating pin 21 is While rotating in the operation direction, the first rack 30a meshed with the first rack 30a simultaneously moves selectively around the guide shaft 28a. At this time, the shift control guide pin 40 in the neutral position is positioned in the first shift groove 36 or the second shift groove 37 of the shift control case 34.

Then, as the first shift arm 31 welded to one end thereof is moved in accordance with the movement of the first rack 30a, the first rotational operation tool on which the semicircular demand 31a is hooked to the locking demand 43a. 43, the protruding pieces 44a and 44b of the first rotational control tool 430 are engaged with the locking pieces 48a of the first speed drive gear 48 that are idle on the main shaft 42. Or it is selectively caught with the locking piece (49a) of the second speed drive gear (49).

Therefore, the first speed drive gear 48 to the second speed drive gear 49 to which the protruding pieces 44a and 44b and the locking pieces 48a and 49b of the first rotational operation tool 43 are selectively engaged. ) Is a first gear driven gear 54 or a second gear gear on the driven shaft 53 engaged with the force while being rotated about the main shaft 42 by receiving the rotational force of the first rotation control tool 43 described above. Each of the driven gears 55 is driven at a predetermined speed, and the stirring shaft 11 in which one end of the bevel gear 58 is engaged with the bevel gear 58 of the driven shaft 53 according to the shifting operation is the lowest speed. Alternatively, while eccentrically rotating at a low to medium speed, an unillustrated stirring mechanism installed at an end thereof stirs the contents in the stirring vessel.

On the other hand, when stirring is being performed in the above-described state, if the stirring shaft 11 is to be changed to the non-variable neutral position, the first gear drive 48 and the second gear drive 49 may be selectively selected. The first rotating operation tool 43, which is caught, needs to be separated from them. In this case, the control shaft 14 is operated again in reverse. That is, when the adjustment shaft 14 is rotated so that the shift control guide pin 40 positioned in the first shift groove 36 or the second shift groove 37 is moved back to the neutral position, the first pinion ( 15) is reversely rotated in the predetermined direction, and the first rack 30a and the first transmission arm 31 are simultaneously moved in the corresponding operation direction in accordance with the reverse rotational power to move the first rotational operation tool 43. At this time, the protruding pieces 44a and 44b of the first rotational control tool 43 are connected to the engaging pieces 48a of the first speed drive gear 48 or the second speed drive gear 49 which are caught by the first rotation operation tool 43. The first and second speed drive gears 48 and 49, which are removed from the locking piece 49a and are returned to the non-shifted position and the locking force is released, are again formed on the driven shaft 53 on the main shaft 42. The first speed driven gear 54 and the second speed driven gear 55 are idling with each other.

Therefore, when the operation is completed as described above, the gears of the main shaft 42 and the driven shaft 53 are idle at the stirring shaft 11 which is being rotated at a predetermined speed, even by the driving force of the driving motor 6. As a result, no rotational force is transmitted at all, and the driving force is lost instantaneously unless the power is turned off and stopped.

In addition, when the agitation shaft 11 is to be shifted to a medium or high speed state again, the same method as the state of shifting to the lowest and middle low speeds described above, that is, the adjustment shaft 14 as described above. In the state in which the shift control guide pin 40 is in the neutral position of the shift control case 40, pull the adjustment shaft 14 in the arrow direction B again as shown in FIG. At the same time as the first operation pin 21 is pulled out from 16a, the second operation pin 22 is inserted into the groove 19a formed in the support body 19 of the second pinion 18.

In this state, the adjustment shaft 14 is rotated in a clockwise or counterclockwise direction as shown in FIG. 6 so that the shift control guide pin 40 is positioned in the third shifting groove 38 or the fourth shifting groove 39. If so, the second pinion 18 is rotated in the selection direction and at the same time the second rack 29b is locked in the semicircle request 32a of the second shifting arm 32 while moving around the guide shaft 28b. The second rotation operation tool 45 on which the 45a is engaged is operated to move.

At this time, the second rotation operation tool 45 is moved and at the same time, the protruding pieces 46a and 46b of each of the engaging pieces 50a and 51a of the third speed drive gear 50 or the fourth speed drive gear 51. (3) and the fourth-speed driven gear (57) and the fourth-speed driven gear (57), which are engaged with the driving gears (50) and (51), which are in the idle state, are forcibly rotated to shift. By receiving a predetermined rotational force to rotate the stirring shaft 11 will be able to perform the stirring operation at a high speed or the highest speed.

In the case of re-shifting or expanding to a neutral position in the above-described shifting state, the adjustment shaft 14 may be operated in the same manner as in the above-described low speed and medium low speed shifting states, and detailed description thereof will be omitted.

Meanwhile, in the present invention, the first and second pinions 15 and 18 that are selectively rotated by being interlocked with the first operating pin 21 and the second operating pin 22 according to the operation of the adjusting shaft 14 are Rotating control pins 23a and 23b mounted on the support bar 24 with springs 26a and 26b are provided for the stop grooves 17a, 17b and 17c of the support tubes 16 and 19, respectively. Since it is in contact with (20a), (20b) and (20c), when one of the gears is rotated during the shifting operation, one of them is not rotated, but in this case, one pinion that is not rotated is burned by the rotation control pin. The rotational force is controlled by the folding force so that it is simply supported on the adjustment shaft 14 and does not rotate along, so that there is no fear that each pinion 15 and 18 may be rotated at the same time during the gear shift operation.

In addition, each pinion 15, 18 has a gap between the stop grooves 17a, 17b, 17c and 20a, 20b, and 20c formed in the corresponding support tubes 16 and 19 in FIG. By matching each shift groove and the neutral position interval on the shift control case 34 shown in the drawing, for example, when the shift control guide 40 of the adjustment shaft 14 is in the neutral position, the rotation control pins 23a and 23b. ) Is in contact with the first stop grooves 17a and 20a, and is in contact with the second stop grooves 17b and 20b when the first shift grooves 36 and the third shift grooves 38 are present. In the case of the two shifting grooves 37 and the fourth shifting grooves 38, they are in contact with the third stop grooves 17c and 20c, respectively. Is rotated only by the exact shifting distance by each of the shift groove and the stop groove of the shift control case 34 is able to induce a state of the gear shifting sure.

As described above, according to the present invention, the driving gear is fixed by a snap ring and is provided with a engaging piece in a state in which it is constructed in an idling state on the main shaft and engaged with the driven gears on the driven shaft, and has a projection piece according to the operation of the adjusting shaft. By selectively moving the operation tool to a predetermined position, the respective drive gears are driven to be shifted by obtaining rotational force by the mutual locking force of the rotation operation tool. The shifting operation is very simple and smooth, and there is no fear of damage to the gears and no noise generated due to gear engagement, and thus the maintenance is easy.

Although the present invention has been described with reference to the accompanying drawings, it should be understood that many modifications and changes may be made without departing from the scope of the following claims.

Claims (2)

With a gear box; A control shaft installed penetrating through the gear box to allow a shift control from the outside; A pinion inserted into the adjustment shaft and forcibly rotating by recessing the grooves selectively by coaxial operation pins when shifting; A rotation control pin having one end carbonized on the main surface of the support tube to control the rotational force of the pinion; A transmission arm which is engaged with the pinion so as to be linearly movable about the guide shaft alternately installed with the control shaft and is welded so that the semicircle request is positioned in the same line at one end; A rotation control tool which is configured to be axially movable left and right about the main shaft rotated by the power of the driving motor according to the operation of the shifting arm, and has a plurality of protruding pieces on both sides thereof; Drive gears which are formed to correspond to each other when the engaging pieces and the engaging pieces are shifted when the rotation operation tool is shifted and are installed in the idle state on the main shaft by varying the pitch circle diameter; Gear shifting control device of the food stirrer consisting of a driven shaft to the drive shaft on the main shaft and the driven shaft is shifted by the driving force of the driven gear that is pitched in the opposite arrangement. According to claim 1, wherein the gear shift control device is installed on the outside of the gearbox coaxial with the control shaft, the shift guide pin is provided with a shift groove is provided as a shift control case for inducing gear shift operation. Gear shifting control device of the food stirrer characterized in that.