Chicken essence seasoning production discharging device

By designing a discharge device that can drive the distribution plate and push rod, the problems of insufficient flexibility and powder clogging in traditional discharge devices are solved, improving production efficiency and continuity, and extending equipment life.

CN224492222UActive Publication Date: 2026-07-14CHENGDU DINGWEI FOOD TECHNOLOGY CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHENGDU DINGWEI FOOD TECHNOLOGY CO LTD
Filing Date
2025-07-04
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Traditional discharge devices are difficult to switch discharge holes flexibly, which leads to frequent shutdowns for adjustments during multi-line production. In addition, chicken essence powder is prone to moisture absorption and clumping, which can cause blockages and affect production continuity.

Method used

A discharge device comprising a dispensing cylinder, a heating structure, a dispensing plate, and a pusher rod is designed. The dispensing plate and pusher rod are driven by a motor to achieve rapid switching of the discharge holes. Combined with low-temperature heating, the powder absorbs moisture and is prevented from clogging.

Benefits of technology

It enables rapid and flexible switching of the discharge port, improving production efficiency by more than 30%, preventing powder blockage, ensuring production continuity, and extending equipment life.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a discharging device for chicken essence seasoning production, which comprises a bottom plate, a distributing cylinder, a cover plate and a plurality of functional box bodies. The distributing cylinder is detachably installed on the bottom plate through a crimping structure, and three circumferentially equidistantly arranged discharging holes and corresponding discharging pipes are arranged in the distributing cylinder; an electric heater is arranged in the first and third box bodies on the cover plate, and is used for heating the inside of the distributing cylinder to prevent chicken essence powder from being damp; a distributing structure is arranged in the second box body, and a distributing plate is driven to rotate and switch the on-off of the discharging holes through a motor; and a pushing structure below the bottom plate is driven by a hollow rotating shaft to drive a pushing rod to push the powder to discharge through the distributing holes. The device is integrally designed through the distributing, heating and pushing, realizes efficient distributing, prevents blockage and is convenient to maintain, and is suitable for the chicken essence seasoning production process.
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Description

Technical Field

[0001] This utility model relates to the field of chicken essence seasoning production technology, specifically to a discharging device for chicken essence seasoning production. Background Technology

[0002] In the production of chicken bouillon seasoning, the discharge device, as a key piece of equipment connecting the powdering and granulation processes, directly affects production efficiency and product quality. Existing technologies for similar devices mainly suffer from the following shortcomings:

[0003] Traditional discharge devices mostly use fixed channels for discharge, making it difficult to flexibly switch the discharge holes according to the number of subsequent granulators. This results in frequent shutdowns for adjustments during multi-line production, leading to low production efficiency.

[0004] Chicken bouillon powder is highly hygroscopic and easily clumps at room temperature. Existing equipment lacks an effective moisture-proof heating structure, and powder accumulation often blocks the discharge channel, affecting continuous production. Utility Model Content

[0005] To address the aforementioned technical problems, this application solves the issues of insufficient material distribution flexibility and powder clogging.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: a discharging device for chicken essence seasoning production, including a base plate, a distributing cylinder is detachably provided at the center of the base plate through a pressing structure, three discharging holes are vertically opened on the upper surface of the base plate inside the distributing cylinder and are arranged at equal intervals along the circumference, and three discharging pipes are provided on the lower surface of the base plate, each corresponding to one of the discharging holes and communicating with them.

[0007] The top of the dispensing cylinder is provided with a cover plate, and an observation notch is provided on the front edge of the cover plate. A flap is hinged to the observation notch, and a locking ring is provided on the flipping side edge of the flap. A locking buckle is provided on the outer peripheral wall of the dispensing cylinder below the locking ring, and the locking buckle can be snapped into the locking ring.

[0008] The upper surface of the cover plate is provided with a first box, a second box, and a third box arranged side by side. The first box and the third box are provided with heating structures. The heating part of the heating structure is placed inside the material dispensing cylinder. The second box is provided with a material dispensing structure. The material dispensing switching part of the material dispensing structure is used to switch the on / off state of the three discharge holes.

[0009] To better realize this utility model, the bottom of the dispensing cylinder is further provided with a lower edge; the pressing structure includes a plurality of pressing arms and a number of fixed seats matching the pressing arms. The pressing arms are evenly distributed around the dispensing cylinder, and the bottom surface of the pressing arms is fixedly connected to the upper surface of the base plate. One end of the fixed seat is pressed against the upper surface of the lower edge, and the bottom surface of the other end of the fixed seat is welded or magnetically connected to the top surface of the pressing arm.

[0010] To better realize this utility model, further, a first mounting port is provided on the inner bottom surface of the first box and the third box; the heating structure includes an electric heater, and an electric heater is provided on each of the first mounting ports. The heating part of the electric heater is placed inside the dispensing cylinder. Each electric heater is connected to a power cord, and a plug is provided at the end of each power cord.

[0011] To better realize this utility model, the material distribution structure further includes a material distribution plate, a material distribution hole is provided on the upper surface of the material distribution plate, the material distribution plate is located inside the material distribution cylinder, and the lower surface of the material distribution plate is attached to the upper surface of the bottom plate and can rotate circumferentially. A solid rotating shaft is provided at the center of the upper surface of the material distribution plate, the top end of the solid rotating shaft extends vertically upward into the second box, and a first bevel gear is sleeved on the top end of the solid rotating shaft. A first motor is provided on the inner bottom surface of the second box, and a second bevel gear is provided at the output end of the first motor. The first bevel gear and the second bevel gear are meshed and connected.

[0012] To better realize this utility model, a fourth box and a fifth box are further provided on the lower surface of the base plate; the discharge device also includes a pushing structure, which includes a pushing rod. A hollow rotating shaft is sleeved on the outside of the solid rotating shaft inside the distributing cylinder. Three pushing rods are fixedly connected to the outer peripheral wall of the bottom of the hollow rotating shaft and are arranged at equal intervals along the circumferential direction. The top of the hollow rotating shaft extends vertically upward into the fourth box. A third bevel gear is sleeved on the outside of the hollow rotating shaft inside the fourth box. A second motor is provided on the inner bottom surface of the fifth box. The output shaft of the second motor extends into the fourth box, and a fourth bevel gear is provided at the end of the output shaft of the second motor. The third bevel gear inside the fourth box meshes with the fourth bevel gear.

[0013] To better realize this utility model, the bottom surface of the fourth housing is provided with a first through hole, the hollow rotating shaft extends into the fourth housing through the first through hole, and a sealing ring bearing is provided between the outside of the hollow rotating shaft and the first through hole.

[0014] A second through hole is provided on the side wall of the fourth housing, and a third through hole is provided on the side wall of the fifth housing. The output shaft of the second motor passes through the third through hole and the second through hole in sequence, so that the end of the output shaft of the second motor extends into the fourth housing. A sealing ring bearing is provided between the output shaft of the second motor and the second through hole, and between the output shaft of the second motor and the third through hole.

[0015] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0016] 1. In this utility model, the material distribution plate is driven to rotate by the first motor, and the material distribution hole can be precisely aligned with any discharge hole, realizing the rapid switching of three-channel discharge. It is suitable for multiple granulators to produce at the same time without stopping the machine for adjustment, and the production efficiency is increased by more than 30%.

[0017] 2. In this utility model, the electric heater heats the inside of the dispensing cylinder at a low temperature of 40-60°C, which effectively inhibits the powder from absorbing moisture and clumping. Combined with the continuous stirring of the pusher rod, it prevents blockage of the discharge channel and ensures continuous production.

[0018] 3. In this utility model, the pushing structure rotates synchronously with the distributing plate, and the pushing rod pushes the powder evenly through the distributing hole. This not only solves the problem of stagnation caused by gravity-fed material falling, but also allows the discharge amount to be controlled by adjusting the motor speed, thus achieving quantitative distributing.

[0019] 4. In this utility model, the pressing structure adopts a magnetic connection between the pressing arm and the fixed seat, and the dispensing cylinder can be quickly disassembled to facilitate the cleaning of residual powder inside; sealing ring bearings are set at the connection of each box to avoid dust leakage, and the material compatibility design eliminates the effects of thermal expansion and contraction, extending the service life of the equipment.

[0020] 5. In this utility model, the functions of heating, dispensing, and pushing are integrated into the cover plate and bottom plate structure, which occupies little space, and the heat dissipation window design ensures that the operating temperature of components such as motors is stable, thereby improving the reliability of the device. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 for Figure 1The front view;

[0024] Figure 3 for Figure 2 Sectional view at point AA;

[0025] Figure 4 for Figure 2 Sectional view at point BB;

[0026] Figure 5 for Figure 1 Top view;

[0027] Figure 6 for Figure 1 A bottom view;

[0028] Figure 7 This is a schematic diagram of the material distribution structure and the material pushing structure in this utility model;

[0029] Figure 8 for Figure 1 partial cross-section Figure 1 ;

[0030] Figure 9 for Figure 1 partial cross-section Figure 2 .

[0031] Explanation of reference numerals in the attached drawings: 101-Base plate; 102-Lower edge; 103-Distribution cylinder; 104-Upper edge; 105-Lock; 106-Pressing arm; 107-Fixing base; 108-Discharge pipe; 201-Flip plate; 202-Lock ring; 301-Cover plate; 302-First housing; 303-Second housing; 304-Third housing; 305-Feeding channel; 306-First heat dissipation window; 307-Second heat dissipation window; 308 - Bolt hole; 401- Electric heater; 402- Power cord; 403- Plug; 501- Material distribution plate; 502- Solid rotating shaft; 503- First bevel gear; 504- Second bevel gear; 505- First motor; 506- Material distribution hole; 601- Push rod; 602- Hollow rotating shaft; 603- Third bevel gear; 604- Fourth bevel gear; 605- Second motor; 606- Fourth housing; 607- Cavity; 608- Fifth housing. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] In the description of this application, it should be noted that the use of terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product is in use. These terms are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the use of terms such as "first" and "second" in the description of this application is only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not imply that the component is required to be absolutely horizontal or suspended, but rather that it may be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it may be slightly tilted.

[0037] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] Example 1

[0039] like Figures 1 to 9As shown, a discharging device for chicken essence seasoning production includes a base plate 101. A distributing cylinder 103 is detachably installed at the center of the base plate 101 via a pressing structure. Three discharging holes are vertically opened through the upper surface of the base plate 101 inside the distributing cylinder 103 and are arranged at equal intervals along the circumference. Three discharging pipes 108 are provided on the lower surface of the base plate 101, each corresponding to one of the discharging holes and communicating with them.

[0040] The top of the dispensing cylinder 103 is provided with a cover plate 301. An observation notch is provided on the front edge of the cover plate 301. A flap 201 is hinged to the observation notch. A locking ring 202 is provided on the flip side edge of the flap 201. A locking buckle 105 (the locking buckle 105 is a mature existing technology) is provided on the outer peripheral wall of the dispensing cylinder 103 below the locking ring 202. The locking buckle 105 can be snapped together with the locking ring 202 (the snap-connection method is a mature existing technology).

[0041] The upper surface of the cover plate 301 is provided with a first box 302, a second box 303 and a third box 304 arranged side by side. The first box 302 and the third box 304 are provided with heating structures. The heating part of the heating structure is placed inside the material dispensing cylinder 103. The second box 303 is provided with a material dispensing structure. The material dispensing switching part of the material dispensing structure is used to switch the on / off state of the three discharge holes.

[0042] like Figures 1 to 9 As shown, in this embodiment, the bottom of the dispensing cylinder 103 is provided with a lower edge 102; the pressing structure includes a plurality of pressing arms 106 and a number of fixing seats 107 matching the pressing arms 106. The pressing arms 106 are evenly distributed around the dispensing cylinder 103, and the bottom surface of the pressing arms 106 is fixedly connected to the upper surface of the base plate 101. One end of the fixing seat 107 is pressed against the upper surface of the lower edge 102, and the bottom surface of the other end of the fixing seat 107 is welded or magnetically connected to the top surface of the pressing arm 106.

[0043] like Figures 1 to 9As shown, in this embodiment, the inner bottom surfaces of the first housing 302 and the third housing 304 are each provided with a first mounting port; the heating structure includes an electric heater 401 (which is a mature existing technology, such as HY-GYY-2.4-380V / 3, PTC heater (12V / 60℃ / 2-4W, 5V / 40℃ / 2-5W, etc.). The electric heater 401 is a low-temperature heater with a heating temperature of 40-60℃). Each of the first mounting ports is provided with an electric heater 401. The heating part of the electric heater 401 is placed inside the dispensing cylinder 103. Each electric heater 401 is connected to a power cord 402, and each power cord 402 has a plug 403 at its end.

[0044] like Figures 1 to 9 As shown, in this embodiment, the material distribution structure includes a material distribution plate 501. A material distribution hole 506 is provided on the upper surface of the material distribution plate 501. The material distribution plate 501 is located inside the material distribution cylinder 103, and the lower surface of the material distribution plate 501 is attached to the upper surface of the bottom plate 101 and can rotate circumferentially. A solid rotating shaft 502 is provided at the center of the upper surface of the material distribution plate 501. The top end of the solid rotating shaft 502 extends vertically upward into the second housing 303, and a first bevel gear 503 is sleeved on the top end of the solid rotating shaft 502. A first motor 505 is provided on the inner bottom surface of the second housing 303. A second bevel gear 504 is provided at the output end of the first motor 505. The first bevel gear 503 and the second bevel gear 504 are meshed and connected.

[0045] like Figures 1 to 9 As shown, in this embodiment, a fourth housing 606 and a fifth housing 608 are provided on the lower surface of the base plate 101; the discharge device also includes a pushing structure, which includes a pushing rod 601. The solid rotating shaft 502 is located inside the material distribution cylinder 103, and a hollow rotating shaft 602 is sleeved on its outer side. Three pushing rods 601, arranged at equal intervals along the circumferential direction, are fixedly connected to the outer peripheral wall of the bottom of the hollow rotating shaft 602. The top of the hollow rotating shaft 602 extends vertically upward to the... Inside the fourth housing 606, the hollow rotating shaft 602 is fitted with a third bevel gear 603 on its outer side. A second motor 605 is provided on the inner bottom surface of the fifth housing 608. The output shaft of the second motor 605 extends into the fourth housing 606, and a fourth bevel gear 604 is provided at the end of the output shaft of the second motor 605. The third bevel gear 603 and the fourth bevel gear 604 are meshed and connected inside the fourth housing 606.

[0046] like Figures 1 to 9As shown, in this embodiment, the bottom surface of the fourth housing 606 is provided with a first through hole, and the hollow rotating shaft 602 extends into the fourth housing 606 through the first through hole. A sealing ring bearing is provided between the outside of the hollow rotating shaft 602 and the first through hole.

[0047] The fourth housing 606 has a second through hole on its side wall, and the fifth housing 608 has a third through hole on its side wall. The output shaft of the second motor 605 passes through the third through hole and the second through hole in sequence, so that the end of the output shaft of the second motor 605 extends into the fourth housing 606. Sealing ring bearings are provided between the output shaft of the second motor 605 and the second through hole, and between the output shaft of the second motor 605 and the third through hole.

[0048] The feeding channel 305 is located on the rear side of the fifth housing 608; second heat dissipation windows 307 are provided on the side walls of the first housing 302, the second housing 303, and the third housing 304; a first heat dissipation window 306 is provided on the upper surface of the cover plate 301 between the second housing 303 and the feeding channel 305, and the first heat dissipation window 306 is connected to the fifth housing 608; a cavity 607 is provided inside the push rod 601 to reduce mass. The materials of all parts of the discharge device are compatible to avoid the effects of thermal expansion and contraction; the speed ratio of the second motor 605 to the first motor 505 can be 1:1 to ensure that the push rod 601 and the distributing plate 501 rotate synchronously to avoid relative friction. Alternatively, a hollow rotating shaft 602 is sleeved on the outside of a solid rotating shaft 502, with multiple bearings provided between them.

[0049] Working principle:

[0050] After plugging plug 403 into an external power source, start the electric heater 401 to raise the internal temperature of the dispensing cylinder 103 (the selected electric heater 401 should be heated to a maximum temperature that will not cause the chicken bouillon powder to react; preheating for 10-30 minutes is acceptable. Since precise temperature control is not required, a temperature sensor is not necessary). This prevents the retention of humid air inside the dispensing cylinder 103. The chicken bouillon powder produced in the previous process enters the dispensing cylinder 103 through the feeding channel 305, and then, according to actual needs (determined by the needs of the next process), the dispensing process proceeds. There are multiple granulators (each granulator is connected to a discharge pipe 108). After selecting a discharge pipe 108 to be opened, the first motor 505 is started, which causes the second bevel gear 504 to drive the first bevel gear 503 to rotate. The first bevel gear 503 drives the solid rotating shaft 502 to rotate, thereby driving the distribution plate 501 to rotate. This causes the distribution hole 506 to rotate to be directly above the discharge hole connected to the input end of the designated discharge pipe 108 to be opened and to be arranged concentrically, so that the distribution hole 506 is connected to the corresponding discharge hole, and thus connected to the corresponding discharge pipe 108. Then, the second motor 605 is started, which drives the fourth bevel gear 604 to rotate. The fourth bevel gear 604 drives the third bevel gear 603 to rotate, and the third bevel gear 603 drives the hollow rotating shaft 602 to rotate. This causes the push rod 601 to rotate on the upper surface of the distribution plate 501, thereby pushing a portion of the chicken essence powder towards the distribution hole 506 until it passes through the distribution hole 506, the corresponding discharge hole of the distribution hole 506, and the corresponding discharge pipe 108 of the distribution hole 506 in sequence, thus completing the distribution process of the chicken essence powder.

[0051] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A discharging device for chicken bouillon seasoning production, comprising a base plate (101) and a power cord (402), characterized in that: A material distribution cylinder (103) is detachably installed at the center of the base plate (101) via a pressing structure. Three discharge holes are vertically opened on the upper surface of the base plate (101) inside the material distribution cylinder (103) and are evenly spaced along the circumference. Three discharge pipes (108) are provided on the lower surface of the base plate (101) and are respectively connected to the discharge holes. The top of the dispensing cylinder (103) is provided with a cover plate (301), and an observation notch is provided on the front edge of the cover plate (301). A flap (201) is hinged to the observation notch. A locking ring (202) is provided on the flip side edge of the flap (201). A latch (105) is provided on the outer peripheral wall of the dispensing cylinder (103) below the latch (202). The latch (105) can be snapped into the latch (202). The upper surface of the cover plate (301) is provided with a first box (302), a second box (303) and a third box (304) arranged side by side. The first box (302) and the third box (304) are provided with heating structures. The heating part of the heating structure is placed inside the material distribution cylinder (103). The second box (303) is provided with a material distribution structure. The material distribution switching part of the material distribution structure is used to switch the on / off state of the three discharge holes.

2. The discharging device for chicken essence seasoning production according to claim 1, characterized in that: The bottom of the dispensing cylinder (103) is provided with a lower edge (102); the pressing structure includes a plurality of pressing arms (106) and a number of fixed seats (107) matching the pressing arms (106). The pressing arms (106) are evenly distributed around the dispensing cylinder (103), and the bottom surface of the pressing arms (106) is fixedly connected to the upper surface of the base plate (101). One end of the fixed seat (107) is pressed against the upper surface of the lower edge (102), and the bottom surface of the other end of the fixed seat (107) is welded or magnetically connected to the top surface of the pressing arm (106).

3. The discharging device for chicken essence seasoning production according to claim 2, characterized in that: The first housing (302) and the third housing (304) are provided with first installation ports on their inner bottom surfaces; the heating structure includes an electric heater (401), and each of the first installation ports is provided with an electric heater (401). The heating part of the electric heater (401) is placed inside the dispensing cylinder (103). Each electric heater (401) is connected to a power cord (402), and each power cord (402) is provided with a plug (403) at its end.

4. The discharging device for chicken essence seasoning production according to claim 3, characterized in that: The material distribution structure includes a material distribution plate (501), on the upper surface of which a material distribution hole (506) is provided. The material distribution plate (501) is located inside the material distribution cylinder (103), and the lower surface of the material distribution plate (501) is in contact with the upper surface of the base plate (101) and can rotate circumferentially. A solid rotating shaft (502) is provided at the center of the upper surface of the material distribution plate (501). The top end of the solid rotating shaft (502) extends vertically upward into the second housing (303), and a first bevel gear (503) is sleeved on the top end of the solid rotating shaft (502). A first motor (505) is provided on the inner bottom surface of the second housing (303), and a second bevel gear (504) is provided at the output end of the first motor (505). The first bevel gear (503) and the second bevel gear (504) are meshed and connected.

5. The discharging device for chicken essence seasoning production according to claim 4, characterized in that: The bottom plate (101) is provided with a fourth box (606) and a fifth box (608) on its lower surface; the discharge device also includes a pushing structure, which includes a pushing rod (601). The solid rotating shaft (502) is located inside the material distribution cylinder (103) and a hollow rotating shaft (602) is sleeved on its outer side. Three pushing rods (601) are fixedly connected to the outer peripheral wall of the bottom of the hollow rotating shaft (602) and are arranged at equal intervals along the circumferential direction. The top of the hollow rotating shaft (602) extends vertically upward to the fourth box (608). Inside 06), the hollow rotating shaft (602) is located inside the fourth housing (606) and a third bevel gear (603) is sleeved on the outside. A second motor (605) is provided on the inner bottom surface of the fifth housing (608). The output shaft of the second motor (605) extends into the fourth housing (606), and a fourth bevel gear (604) is provided at the end of the output shaft of the second motor (605). The third bevel gear (603) located inside the fourth housing (606) meshes with the fourth bevel gear (604).

6. The discharging device for chicken essence seasoning production according to claim 5, characterized in that: The bottom surface of the fourth housing (606) is provided with a first through hole, and the hollow rotating shaft (602) extends into the fourth housing (606) through the first through hole. A sealing ring bearing is provided between the outside of the hollow rotating shaft (602) and the first through hole. The fourth housing (606) has a second through hole on its side wall, and the fifth housing (608) has a third through hole on its side wall. The output shaft of the second motor (605) passes through the third through hole and the second through hole in sequence, so that the end of the output shaft of the second motor (605) extends into the fourth housing (606). A sealing ring bearing is provided between the output shaft of the second motor (605) and the second through hole, and between the output shaft of the second motor (605) and the third through hole.