Planetary transmission dough mixer

Abstract

The utility model discloses a planetary transmission dough kneading machine, which comprises a machine base, a machine body, a stirring power assembly and a dough kneading barrel assembly, the machine body is connected with the rear part of the machine base, the stirring power assembly is arranged at the front part of the machine body, and the dough kneading barrel assembly is placed at the front part of the machine base and is positioned below the stirring power assembly; the stirring power assembly comprises a stirring motor, a gear box body, a worm and worm wheel assembly, a main shaft assembly, a planetary motion assembly and a dough kneading hook, the stirring motor and the gear box body are both fixed on a bottom plate at the front part of the machine body, the worm and worm wheel assembly and the main shaft assembly are both located in the gear box body, and the worm and worm wheel assembly is connected with the stirring motor; the main shaft assembly is connected with the worm and worm wheel assembly, the planetary motion assembly is connected with the main shaft assembly, and the dough kneading hook is connected with the planetary motion assembly. According to the planetary transmission dough kneading machine, the large-capacity dough kneading barrel is fixed, and the planetary motion of the dough kneading hook is equivalent to the compound motion of a double-acting dough kneading machine, so that the transmission structure is simplified, and the dough kneading motion stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of food machinery, and more specifically to a dough mixer. Background Art

[0002] Most traditional small dough mixers have a double-action structure, that is, both the dough hook and the dough barrel rotate, and the rotation centers of the two are offset by a distance. This movement combination is conducive to faster dough mixing, but large-capacity models are obviously not suitable for this structure: 1. If the large-capacity dough barrel rotates, it needs a considerable degree of rigid support, otherwise it will easily swing due to the lateral torque when kneading the dough and affect the work; 2. The speed ratio of the dough hook and the dough barrel needs to be controlled within a certain range. When the large-capacity model is designed as a double-action type, the transmission chain will be pulled very long, which is not conducive to smooth transmission. Utility Model Content

[0003] The problem to be solved by the utility model is to provide a planetary transmission dough mixer, in which the large-capacity dough mixer barrel is fixed, and the dough mixer hook performs planetary motion equivalent to the compound motion of the double-action dough mixer, thus simplifying the transmission structure and improving the stability of the dough mixer motion. At the same time, the machine body can be raised and lowered, and the dough mixer barrel can be quickly unloaded and loaded, thus shortening the operation cycle time.

[0004] The utility model discloses a planetary transmission dough mixer, which comprises a machine base, a machine body, a stirring power assembly, and a dough mixing barrel assembly. The machine body is connected to the rear of the machine base, the stirring power assembly is arranged at the front of the machine body, and the dough mixing barrel assembly is placed at the front of the machine base and is located below the stirring power assembly; the stirring power assembly comprises a stirring motor, a gear box body, a worm and worm wheel assembly, a main shaft assembly, a planetary motion assembly, and a dough mixing hook. The stirring motor and the gear box body are both fixed on the upper surface of a bottom plate at the front of the machine body, the gear box body is located in front of the stirring motor, the worm and worm wheel assembly and the main shaft assembly are both located in the gear box body, the worm and worm wheel assembly is connected to the stirring motor, the main shaft assembly is connected to the worm and worm wheel assembly, the planetary motion assembly is located below the gear box body and is connected to the main shaft assembly, and the dough mixing hook is connected to the planetary motion assembly.

[0005] Furthermore, the worm and worm wheel assembly includes a worm, a worm wheel, a bearing I, and an end cover, the main shaft assembly includes a main shaft, a central fixed shaft, a flat key I, and an upper end cover, and the planetary motion assembly includes a planetary disc frame, a lower cover, a central gear, a symmetrical flat key, and two planetary gear units; the upper end cover is fixed on the upper panel of the gear box, and an end cover is fixed on the inner side of each of the front and rear plates; the worm is arranged horizontally, and its front and rear ends are connected to the end cover through bearing I, and the output shaft of the stirring motor extends into the gear box and is connected to the worm; the main shaft is arranged vertically, and the worm wheel is connected to the main shaft through flat key I and meshes with the worm; the lower end face of the main shaft is connected to the planetary disc frame, and the lower cover is fixed under the planetary disc frame to form a closed space; the central fixed shaft cooperates with the inner hole of the main shaft, its upper section extends out of the gear box and is connected to the upper end cover, and its lower section extends into the closed space and is connected to the central gear through two symmetrical flat keys, and the two planetary gear units are symmetrically arranged relative to the center of the central gear, and each planetary gear unit is connected to a dough hook.

[0006] Furthermore, each planetary gear unit includes a planetary gear, a lifting end cover, a dough hook drive shaft, and a flat key II; the lifting end cover is fixedly connected to the upper panel of the planetary disc frame, the upper end of the dough hook drive shaft is connected to the lifting end cover, and its lower end extends out of the lower cover and is connected to the dough hook, and the planetary gear is connected to the dough hook drive shaft through the flat key II and meshes with the center gear.

[0007] Furthermore, each planetary gear unit also includes two upper and lower bearings II; and bearings II are arranged between the upper and lower ends of the surface hook drive shaft and the planetary disc frame and the lower cover.

[0008] Furthermore, the main shaft assembly also includes an upper bearing, an upper spacer, a lower spacer, and a lower bearing; an upper bearing and a lower bearing are arranged between the upper and lower ends of the main shaft and the upper and lower box plates of the gear box body, the upper spacer is sleeved on the upper section of the main shaft, and its upper and lower end faces are respectively in contact with the upper bearing and the worm gear, and the lower spacer is sleeved on the lower section of the main shaft, and its upper and lower end faces are respectively in contact with the worm gear and the lower bearing.

[0009] Furthermore, the main shaft assembly also includes a main shaft inner sleeve bearing and a center shaft lower bearing; the main shaft inner sleeve bearing and the center shaft lower bearing are respectively arranged between the central fixed shaft and the lower end and lower cover of the main shaft.

[0010] Furthermore, the planetary transmission dough mixer also includes a lifting mechanism, which includes a lifting reducer, a screw rod, a nut seat, a copper nut, and a lifting motor; the lifting motor and the lifting reducer are both fixed on the bottom plate of the machine base, the nut seat is fixed on the inner wall of the lower part of the machine body, the copper nut is fixed in the nut seat, the lower part of the screw rod is installed in the center hole of the lifting reducer, and the upper part thereof is engaged with the copper nut; the machine body and the machine base are connected by a sliding guide rail.

[0011] Furthermore, the lifting mechanism also includes a locking unit, which includes a locking handle and a limit block; the locking handle is fixed on the side wall of the base, and the limit block is arranged on the locking handle.

[0012] Furthermore, the dough kneading barrel assembly includes a dough kneading barrel body, a barrel bottom lining, a driving pin, and a locking nut; the barrel bottom lining is fixed to the bottom of the dough barrel body, the driving pin is connected to the barrel bottom lining, the locking nut is screwed onto the driving pin, and the driving pin is connected to the arc-shaped waist groove at the front of the machine base.

[0013] The beneficial effects of the planetary transmission dough mixer of the utility model are as follows: (1) the large-capacity dough mixer barrel is fixed, and the dough hook performs planetary motion: it not only rotates around its own axis to stir the dough, but also continuously changes its position in the dough mixer barrel, thus being equivalent to the compound motion of a double-action dough mixer, thereby ensuring the dough quality; the dough mixer barrel is fixed, thus eliminating the internal connection transmission chain between the dough mixer barrel and the dough hook, thereby simplifying the transmission structure; at the same time, it is also unnecessary to rigidly support the rotation of the dough mixer barrel, thereby reducing the manufacturing cost and improving the cost performance of the product; (2) the dough hook rises with the machine body, and the dough mixer barrel body can be quickly unloaded, thereby greatly facilitating the operation, shortening the operation cycle time, and improving the efficiency of the equipment; (3) the dough hooks are symmetrically arranged at both ends of the planetary frame, thereby improving the stability of the dough mixer movement, and the dough mixer efficiency is also greatly improved compared to the large-capacity dough mixer barrel, thereby enabling users to obtain better comprehensive benefits. Therefore, the utility model can be applied to dough mixers with larger capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of a planetary transmission dough mixer of the utility model;

[0015] Figure 2 This is a front view of a planetary transmission dough mixer of the utility model;

[0016] Figure 3 yes Figure 2 Right view of;

[0017] Figure 4 yes Figure 2 A top view of

[0018] Figure 5 is along Figure 3 Sectional view along line AA;

[0019] Figure 6 is along Figure 5 Sectional view of the mid-CC line;

[0020] Figure 7 is along Figure 2 Sectional view along the midline BB;

[0021] Figure 8 is along Figure 7Sectional view along the mid-DD line;

[0022] Fig. 9 This is an exploded view of the dough barrel assembly;

[0023] Fig.10 This is a top view of the bottom of the machine. DETAILED DESCRIPTION

[0024] In order to further understand the content of the utility model, a detailed description is given in conjunction with the drawings and embodiments.

[0025] Example 1

[0026] from Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 It can be seen that the utility model is a planetary transmission dough mixer, which includes a machine base 100, a machine body 300, a stirring power assembly 200, and a dough mixing barrel assembly 400. The machine body 300 is connected to the rear of the machine base 100, the stirring power assembly 200 is arranged at the front of the machine body 300, and the dough mixing barrel assembly 400 is placed at the front of the machine base 100 and is located below the stirring power assembly 200; the stirring power assembly 200 includes a stirring motor 223, a gear box 211, a worm gear assembly, and a main shaft assembly. , planetary motion assembly, dough hook 207, the stirring motor 223 and the gear box 211 are all fixed on the front bottom plate of the body 300, the gear box 211 is located in front of the stirring motor 223, the worm and worm gear assembly and the main shaft assembly are both located in the gear box 211, the worm and worm gear assembly is connected to the stirring motor 223, the main shaft assembly is connected to the worm and worm gear assembly, the planetary motion assembly is located below the gear box 211 and is connected to the main shaft assembly, and the dough hook 207 is connected to the planetary motion assembly.

[0027] The utility model planetary transmission dough mixer: the stirring motor 223 provides power, and drives the main shaft assembly to rotate through the worm gear assembly, so as to output stirring power downward, and the main shaft assembly drives the dough hook to rotate through the planetary motion assembly, and the dough hook 207 rotates around its own axis, thus forming a planetary transmission of self-rotation and revolution of the dough hook 207, and the dough barrel no longer rotates, so there is no need for strong rigid support for the dough barrel, and the transmission chain will not be lengthened, which ensures smooth transmission during operation and stable placement of the dough barrel, thereby ensuring work quality.

[0028] Example 2

[0029] from Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6It can be seen that the utility model is a planetary transmission dough mixer: the worm and worm gear assembly includes a worm 212, a worm gear 213, a bearing Ⅰ224, and an end cover 226; the main shaft assembly includes a main shaft 214, a central fixed shaft 215, a flat key Ⅰ219, and an upper end cover 216; the planetary motion assembly includes a planetary disc frame 201, a lower cover 204, a central gear 208, a symmetrical flat key 209, and two planetary gear units; the upper end cover 216 is fixed on the upper panel of the gear box 211, and an end cover 226 is fixed on the inner side of the front and rear plates; the worm 212 is arranged horizontally, and its front and rear ends are connected to the end cover 226 through the bearing Ⅰ224, and the output shaft of the stirring motor 223 extends into the gear The housing 211 is connected to the worm 212; the main shaft 214 is vertically arranged, and the worm wheel 213 is connected to the main shaft 214 through a flat key Ⅰ219 and meshes with the worm 212; the lower end face of the main shaft 214 is connected to the planetary disc frame 201, and the lower cover 204 is fixed under the planetary disc frame 201 to form a closed space; the central fixed shaft 215 cooperates with the inner hole of the main shaft 214, its upper section extends out of the gear housing 211 and is connected to the upper end cover 216, and its lower section extends into the closed space and is connected to the center gear 208 through two symmetrical flat keys 209. The two planetary gear units are symmetrically arranged relative to the center of the center gear 208, and each planetary gear unit is connected to a dough hook 207.

[0030] When the stirring motor 223 provides power, the worm gear 213 is driven to rotate through the worm 212 and then the main shaft 214 is driven to rotate. The main shaft 214 drives the planetary motion component to rotate, and the planetary gear unit rotates accordingly, so that the symmetrical dough hook 207 realizes orbital revolution with the main shaft 214 as the rotation center.

[0031] The central fixed shaft 215 is positioned axially and circumferentially by the upper end cover 216, thereby achieving axial and circumferential positioning of both the main shaft 214 and the central gear 208. In order to achieve the cooperation between the upper end cover 216 and the central fixed shaft 215, the upper end cover 216 is composed of two half-sections.

[0032] Example 3

[0033] from Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 It can be seen that the utility model is a planetary transmission dough mixer: each planetary gear unit includes a planetary gear 202, a tightening end cover 205, a dough hook driving shaft 206, and a flat key II 210; the tightening end cover 205 is fixedly connected to the upper panel of the planetary disc frame 201, the upper end of the dough hook driving shaft 206 is connected to the tightening end cover 205, and its lower end extends out of the lower cover 204 and is connected to the dough hook 207, and the planetary gear 202 is connected to the dough hook driving shaft 206 through the flat key II 210 and meshes with the center gear 208.

[0034] When the main shaft 214 revolves with the dough hook 207, the dough hook 207 rotates around the dough hook driving shaft 206, so the dough hook 207 realizes planetary rotation. At this time, the planetary gear 202 itself rotates, but the central fixed shaft 215 and the central gear 208 are circumferentially fixed by the symmetrical flat key 209, so the central gear 208 does not rotate.

[0035] Example 4

[0036] from Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 It can be seen that the utility model is a planetary transmission dough mixer: each planetary gear unit also includes two upper and lower bearings II 203; bearings II 203 are arranged between the upper and lower ends of the dough hook driving shaft 206 and the planetary disc frame 201 and the lower cover 204.

[0037] The bearing 203 ensures that the dough hook driving shaft 206 drives the dough hook 207 to rotate.

[0038] Example 5

[0039] from Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 It can be seen that the utility model is a planetary transmission dough mixer: the main shaft assembly also includes an upper bearing 217, an upper spacer sleeve 218, a lower spacer sleeve 220, and a lower bearing 221; an upper bearing 217 and a lower bearing 221 are arranged between the upper and lower ends of the main shaft 214 and the upper and lower box plates of the gear box body 211, the upper spacer sleeve 218 is sleeved on the upper section of the main shaft 214, and its upper and lower end surfaces are respectively in contact with the upper bearing 217 and the worm gear 213, and the lower spacer sleeve 220 is sleeved on the lower section of the main shaft 214, and its upper and lower end surfaces are respectively in contact with the worm gear 213 and the lower bearing 221.

[0040] The upper bearing 217 and the lower bearing 221 ensure the rotation of the main shaft 214 relative to the gear box 211, and the upper spacer 218 and the lower spacer 220 limit the worm wheel 213 in the axial direction, thereby ensuring the reliability of the transmission.

[0041] Example 6

[0042] from Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6It can be seen that the utility model is a planetary transmission dough mixer: the main shaft assembly also includes a main shaft inner sleeve bearing 222 and a center shaft lower bearing 225; the main shaft inner sleeve bearing 222 and the center shaft lower bearing 225 are respectively arranged between the central fixed shaft 215 and the lower end of the main shaft 214 and the lower cover 204.

[0043] The main shaft inner sleeve bearing 222 and the central shaft lower bearing 225 ensure the rotation of the main shaft 214 relative to the central fixed shaft 215 .

[0044] Example 7

[0045] from Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 It can be seen that the planetary transmission dough mixer of the utility model also includes a lifting mechanism, which includes a lifting reducer 101, a screw rod 104, a nut seat 105, a copper nut 106, and a lifting motor 107; the lifting motor 107 and the lifting reducer 101 are fixed on the bottom plate of the machine base 100, the nut seat 105 is fixed on the inner wall of the lower part of the machine body 300, the copper nut 106 is fixed in the nut seat 105, the lower part of the screw rod 104 is installed in the center hole of the lifting reducer 101, and the upper part thereof is engaged with the copper nut 106; the machine body 300 and the machine base 100 are connected by a sliding guide rail.

[0046] The base 100 is used as a fixed basic component, and the body 300 is used as a basic component that slides up and down, and the two are connected by a sliding guide rail; when the lifting motor 107 is working, the lifting reducer 101 drives the screw rod 104 to rotate, and then the copper nut 106 drives the body 300 to move up and down along the base 100 through the sliding guide rail through the nut seat 105.

[0047] Example 8

[0048] from Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 , Figure 8 It can be seen that the utility model is a planetary transmission dough mixer: the lifting mechanism also includes a locking unit, the locking unit includes a locking handle 102 and a limit block 103; the locking handle 102 is fixed on the side wall of the machine base 100, and the limit block 103 is arranged on the locking handle 102.

[0049] The locking unit of the dough mixer is locked when kneading dough, and is released when loading and unloading: when the dough mixer is loading and unloading, the locking handle 102 is pulled outward to make the limit block 103 leave the body 300, and the lifting mechanism works to make the body 300 move upward to drive the dough hook 207 away from the dough barrel assembly 400, and loading and unloading are carried out at this time; when the loading is completed, the lifting mechanism works, the body 300 moves downward to the bottom position of the base 100 to make the dough hook 207 enter the dough barrel assembly 400, and the locking handle 102 is pushed inward to make the limit block 103 clamp the body 300, and at this time the stirring power assembly works, and the dough hook 207 kneads the dough.

[0050] Example 9

[0051] from Figure 1 , Figure 2 , Figure 3 , Figure 4 , Fig. 9 , Fig.10 It can be seen that the utility model is a planetary transmission dough mixer: the dough mixing barrel assembly 400 includes a dough mixing barrel body 401, a barrel bottom lining plate 402, a driving pin 403, and a locking nut 404; the barrel bottom lining plate 402 is fixed to the bottom of the dough mixing barrel body 401, the driving pin 403 is connected to the barrel bottom lining plate 402, the locking nut 404 is screwed on the driving pin 403, and the driving pin 403 is connected to the arc waist groove at the front of the machine base 100.

[0052] Adjust the axial position of the anti-loosening nut 404, insert it from the large hole end of the arc waist groove corresponding to the base 100, rotate the dough barrel body 401 clockwise by an angle, and make the driving pin 403 contact the end of the waist groove. Since the spiral direction of the dough hook 207 determines that the rotation direction of the dough hook can only be clockwise, the friction force of the dough on the inner wall of the dough barrel body 401 will keep its relative position with the base 100 unchanged; when the dough is finished, the machine body 300 and the dough hook 207 are raised, and the dough barrel body 401 can be taken out by rotating it counterclockwise by an angle; if the user does not need to frequently replace the dough barrel, the anti-loosening nut 404 can be locked.

[0053] The dough mixing barrel assembly 400 is installed at the front of the machine base 100, and its connection mode is randomly variable. The dough mixing barrel can be fixed on the machine base by adjusting the five anti-loosening nuts at the bottom, or it can be rotated at an angle to be quickly disassembled.

[0054] The beneficial effects of the planetary transmission dough mixer of the utility model are as follows: (1) the large-capacity dough mixer is fixed, and the dough hook performs planetary motion: it rotates around its own axis to stir the dough, and continuously changes its position in the dough mixer, which is equivalent to the compound motion of a double-action dough mixer, thereby ensuring the quality of dough mixing; the dough mixer is fixed, eliminating the internal connection transmission chain between the dough mixer and the dough hook, simplifying the transmission structure; at the same time, it is also unnecessary to rigidly support the rotation of the dough mixer, thereby reducing the manufacturing cost and improving the cost performance of the product; (2) the dough hook rises with the machine body, and the dough mixer body can be quickly unloaded, which greatly facilitates the operation, shortens the operation cycle time, and improves the efficiency of equipment use; (3) the dough hooks are symmetrically arranged at both ends of the planetary frame, which improves the stability of the dough mixing movement. Compared with the large-capacity dough mixer, its dough mixing efficiency is also greatly improved, so that users can obtain better comprehensive benefits.

[0055] The planetary transmission and lifting body structure of the planetary transmission dough mixer of the utility model can be suitable for dough mixers with larger capacity, thereby improving the performance of the product.

[0056] This embodiment is only a general description, which is not restrictive. The drawings are only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention, they should all fall within the protection scope of the present invention.

Claims

1. A planetary transmission dough mixer, characterized by: The invention comprises a machine base (100), a machine body (300), a stirring power assembly (200), and a dough kneading barrel assembly (400); the machine body (300) is connected to the rear of the machine base (100); the stirring power assembly (200) is arranged at the front of the machine body (300); the dough kneading barrel assembly (400) is placed at the front of the machine base (100) and below the stirring power assembly (200); the stirring power assembly (200) comprises a stirring motor (223), a gear box (211), a worm gear assembly, a main shaft assembly, a planetary motion assembly, and a plurality of gears. The dough kneading hook (207), the stirring motor (223) and the gear box (211) are all fixed on the upper surface of the front bottom plate of the machine body (300), the gear box (211) is located in front of the stirring motor (223), the worm gear assembly and the main shaft assembly are both located in the gear box (211), the worm gear assembly and the stirring motor (223) are connected, the main shaft assembly is connected to the worm gear assembly, the planetary motion assembly is located below the gear box (211) and is connected to the main shaft assembly, and the dough kneading hook (207) is connected to the planetary motion assembly.

2. The planetary transmission dough mixer according to claim 1, characterized in that: The worm and worm gear assembly comprises a worm (212), a worm gear (213), a bearing I (224), and an end cover (226); the main shaft assembly comprises a main shaft (214), a central fixed shaft (215), a flat key I (219), and an upper end cover (216); the planetary motion assembly comprises a planetary disc frame (201), a lower cover (204), a central gear (208), a symmetrical flat key (209), and two planetary gear units; the upper end cover (216) is fixed on the upper panel of the gear box (211), and an end cover (226) is fixed on the inner side of the front and rear plates; the worm (212) is arranged horizontally, and its front and rear ends are connected to the end cover (226) through the bearing I (224); the output shaft of the stirring motor (223) extends into the gear box (211) and is connected to the gear box (211). The main shaft (214) is vertically arranged, and the worm wheel (213) is connected to the main shaft (214) through a flat key I (219) and meshes with the worm (212); the lower end face of the main shaft (214) is connected to the planetary disc frame (201), and the lower cover (204) is fixed under the planetary disc frame (201) to form a closed space; the central fixed shaft (215) is matched with the inner hole of the main shaft (214), the upper section of which extends out of the gear box body (211) and is connected to the upper end cover (216), and the lower section of which extends into the closed space and is connected to the central gear (208) through two symmetrical flat keys (209), and the two planetary gear units are symmetrically arranged relative to the center of the central gear (208), and each planetary gear unit is connected to a dough hook (207).

3. The planetary transmission dough mixer according to claim 2, characterized in that: Each planetary gear unit comprises a planetary gear (202), a hanging end cover (205), a dough hook driving shaft (206), and a flat key II (210); the hanging end cover (205) is fixedly connected to the upper panel of the planetary disc frame (201), the upper end of the dough hook driving shaft (206) is connected to the hanging end cover (205), and the lower end thereof extends out of the lower cover (204) and is connected to the dough hook (207), and the planetary gear (202) is connected to the dough hook driving shaft (206) through the flat key II (210) and meshes with the central gear (208).

4. The planetary transmission dough mixer according to claim 3, characterized in that: Each planetary gear unit also includes two upper and lower bearings II (203); and bearings II (203) are arranged between the upper and lower ends of the hook drive shaft (206) and the planetary disc frame (201) and the lower cover (204).

5. The planetary transmission dough mixer according to claim 2, characterized in that: The main shaft assembly also includes an upper bearing (217), an upper spacer (218), a lower spacer (220), and a lower bearing (221); an upper bearing (217) and a lower bearing (221) are arranged between the upper and lower ends of the main shaft (214) and the upper and lower box plates of the gear box body (211); the upper spacer (218) is sleeved on the upper section of the main shaft (214), and its upper and lower end surfaces are respectively in contact with the upper bearing (217) and the worm gear (213); the lower spacer (220) is sleeved on the lower section of the main shaft (214), and its upper and lower end surfaces are respectively in contact with the worm gear (213) and the lower bearing (221).

6. The planetary transmission dough mixer according to claim 2, characterized in that: The main shaft assembly also includes a main shaft inner sleeve bearing (222) and a center shaft lower bearing (225); the main shaft inner sleeve bearing (222) and the center shaft lower bearing (225) are respectively arranged between the center fixed shaft (215) and the lower end of the main shaft (214) and the lower cover (204).

7. The planetary transmission dough mixer according to claim 1, characterized in that: The planetary transmission dough mixer also includes a lifting mechanism, which includes a lifting reducer (101), a screw rod (104), a nut seat (105), a copper nut (106), and a lifting motor (107); the lifting motor (107) and the lifting reducer (101) are fixed on the bottom plate of the machine base (100); the nut seat (105) is fixed on the inner wall of the lower part of the machine body (300); the copper nut (106) is fixed in the nut seat (105); the lower part of the screw rod (104) is installed in the central hole of the lifting reducer (101), and the upper part of the screw rod (104) is meshed with the copper nut (106); the machine body (300) and the machine base (100) are connected by a sliding guide rail.

8. The planetary transmission dough mixer according to claim 7, characterized in that: The lifting mechanism also includes a locking unit, which includes a locking handle (102) and a limit block (103); the locking handle (102) is fixed on the side wall of the machine base (100), and the limit block (103) is arranged on the locking handle (102).

9. The planetary transmission dough mixer according to claim 1, characterized in that: The dough kneading barrel assembly (400) comprises a dough kneading barrel body (401), a barrel bottom lining plate (402), a driving pin (403), and a locking nut (404); the barrel bottom lining plate (402) is fixed to the bottom of the dough kneading barrel body (401), the driving pin (403) is connected to the barrel bottom lining plate (402), the locking nut (404) is screwed onto the driving pin (403), and the driving pin (403) is connected to the arc-shaped waist groove at the front of the machine base (100).

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