CN220920141U

CN220920141U - Bearing surface cleaning device

Info

Publication number: CN220920141U
Application number: CN202322502238.1U
Authority: CN
Inventors: 陈红新
Original assignee: Luoyang Xingfeng Bearing Co ltd
Current assignee: Luoyang Xingfeng Bearing Co ltd
Priority date: 2023-09-15
Filing date: 2023-09-15
Publication date: 2024-05-10
Anticipated expiration: 2033-09-15

Abstract

The utility model relates to the technical field of bearing processing, in particular to a bearing outer surface cleaning device, which comprises a body, a circulating mechanism, an auxiliary mechanism and a bearing frame, wherein the circulating mechanism is arranged on one side of the body, the auxiliary mechanism is arranged at the bottom of the body, the bearing frame is arranged at the top of the auxiliary mechanism, the bearing frame is positioned in the body, the body comprises a cleaning barrel, a supporting frame is arranged at the bottom of the cleaning barrel, a first connecting seat is fixedly arranged in the cleaning barrel, a first transmission part is arranged on the first connecting seat, and one end of the first transmission part is fixedly connected with an eccentric wheel. The utility model has the advantages that: through setting up assist mechanism, when using, the skew that constantly changes appears in the rotation of second connecting seat drive bearing bracket to make from the surface that spray head department spun washing liquid can more even spray the bearing, avoid appearing having the condition at the dead angle that can't spray between the adjacent bearing, thereby improved the cleaning performance to the bearing.

Description

Bearing surface cleaning device

Technical Field

The utility model relates to the technical field of bearing processing, in particular to a device for cleaning the outer surface of a bearing.

Background

The bearing is a widely used mechanical accessory, and has the main functions of supporting a mechanical rotating body, reducing friction coefficient in the motion process and ensuring the rotation precision. An important indicator of bearing quality is bearing cleanliness, because small particles such as pollutants, dust, fragments generated by abrasion, metal oxides and the like are adsorbed on the surface of a rolling bearing without special protection, friction similar to abrasive materials is formed, and serious abrasion is caused at the contact part between a rolling body and a raceway of the bearing, so that the service life of the bearing is reduced, and therefore, the bearing needs to be effectively cleaned in the production and use processes so as to prolong the service life of the bearing.

The utility model discloses a bearing surface cleaning device in chinese patent CN210172045U, including the stock solution chamber, a water pump, the division board, the conveyer pipe, the stock solution groove, erect the pole, the hollow pole, the movable rod, the laminating board, a spring, the layer board and gear motor, the stock solution chamber sets up in the inside downside of base, the division board is installed to the stock solution chamber upside, the water pump assembly is in the inside left side of stock solution chamber, the water pump up end is connected with the conveyer pipe, the stock solution groove sets up at the washing bucket inner wall, gear motor assembly is in division board up end intermediate position, gear motor up end is fixed with erects the pole, erect pole annular side-mounting has the layer board, erect pole annular side upside and be fixed with the hollow pole, hollow pole internally mounted has the spring, the spring right-hand member face is fixed with the movable rod, the movable rod right-hand member face is fixed with the laminating board.

However, in the actual use process, the following problems also exist:

In the process of spraying cleaning liquid on bearings, the spraying angle of the spray head is fixed, the angle of bearing placement is also fixed, when a plurality of bearings are required to be cleaned simultaneously, dead angles which cannot be sprayed by the spray heads exist at some edges between adjacent bearings, and most of spray heads in the prior art spray and wash the inner ring and the outer ring of the bearings, and the rolling elements between the inner ring and the outer ring of the bearings can have some dead angles which cannot be sprayed and washed due to the shape of the rolling elements, so that the cleaning effect is poor.

Accordingly, the present application provides a cleaning device for an outer surface of a bearing to solve the above-mentioned problems.

Disclosure of utility model

The object of the present utility model is to solve at least one of the technical drawbacks.

The utility model aims to overcome the defects of the prior art, solve the problems in the background art and provide a bearing outer surface cleaning device.

The aim of the utility model is achieved by the following technical scheme: the bearing outer surface cleaning device comprises a body, a circulating mechanism, an auxiliary mechanism and a bearing frame, wherein the circulating mechanism is arranged on one side of the body, the auxiliary mechanism is arranged at the bottom of the body, the bearing frame is arranged at the top of the auxiliary mechanism, and the bearing frame is positioned in the body;

The body comprises a cleaning barrel, a supporting frame is arranged at the bottom of the cleaning barrel, a first connecting seat is fixedly arranged in the cleaning barrel, a first transmission part is arranged on the first connecting seat, one end of the first transmission part is fixedly connected with an eccentric wheel, and a sliding groove is formed in the bottom of the cleaning barrel;

The auxiliary mechanism comprises a power assembly, the power assembly is fixedly arranged on the supporting frame, a transmission assembly is arranged at the output end of the power assembly, the power assembly is connected with an output assembly through transmission of the transmission assembly, and the transmission assembly and the output assembly are both movably connected with the cleaning barrel;

the output assembly comprises an intermittent gear, one end of the intermittent gear is fixedly connected with a rotating seat, the rotating seat is rotationally connected to the inside of the cleaning barrel, a flexible column and a first elastic piece are arranged at the top of the rotating seat, the rotating seat is fixedly connected with a second connecting seat through the flexible column and the first elastic piece, and the eccentric wheel is located between the rotating seat and the second connecting seat.

Preferably, a cavity is formed in the wall of the cleaning barrel, a liquid inlet pipe and a liquid outlet pipe are fixedly connected to the cleaning barrel, and a spray head is arranged in the cleaning barrel.

Preferably, the circulation mechanism comprises a storage tank, one side fixedly connected with injection pipe at the top of the storage tank, a discharge pipe is fixedly connected with the bottom of one side of the storage tank, an extraction pipe is fixedly connected to the storage tank, one end of the extraction pipe, which is far away from the storage tank, is provided with a circulation pump, the output end of the circulation pump is fixedly connected with a first connecting pipe, the first connecting pipe is connected with one end, which is far away from the cleaning barrel, of the liquid inlet pipe, the top of the storage tank is provided with a filtering device, the input end of the filtering device is provided with a second connecting pipe, and the second connecting pipe is connected with one end, which is far away from the cleaning barrel, of the liquid outlet pipe.

Preferably, the power assembly comprises a power piece, and the output end of the power piece is provided with a transmission gear.

Preferably, the transmission assembly comprises a gear ring, a sliding part is fixedly connected to the gear ring, the sliding part is located in the sliding groove, the gear ring is movably connected with the cleaning barrel through the sliding part, a planetary gear is arranged on the inner side of the gear ring and is in transmission connection with the gear ring, the planetary gear is in transmission connection with the intermittent gear, a second transmission part is arranged on the planetary gear and is in transmission connection with the first transmission part, and the planetary gear is rotationally connected to the bottom of the cleaning barrel through the second transmission part.

Preferably, the bearing bracket comprises a connecting shaft, one end of the connecting shaft is provided with a handle, one end fixedly connected with connector of the connecting shaft, which is far away from the handle, is installed on the second connecting seat through the connector, the connecting shaft is fixedly connected with a cross rod, a connecting groove is formed in the cross rod, the cross rod is slidably connected with a supporting part through the connecting groove, a second elastic part is arranged between the supporting part and the cross rod, the second elastic part is located inside the connecting groove, and a fixing hook is fixedly connected on the cross rod.

Preferably, the gear teeth are fully distributed on the outer side of the gear ring, the gear teeth are not fully distributed on the inner side of the gear ring, the transmission gear is positioned on the outer side of the gear ring, and the gear ring is in transmission connection with the transmission gear.

Compared with the prior art, the utility model has the following advantages:

Through setting up assist mechanism, when using, the skew that constantly changes appears in the second connecting seat drive bearing bracket pivoted to make from the surface that spray head department spun washing liquid can more even spray the bearing, avoid appearing having the condition at the dead angle that can not spray between the adjacent bearing, simultaneously, along with the change of skew degree, make the shower nozzle can directly spray the washing to the rolling element of bearing, thereby improved the cleaning performance to the bearing.

None of the parts of the device are the same as or can be implemented using prior art.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic cross-sectional view of the present utility model;

FIG. 3 is an enlarged schematic view of the structure of FIG. 2A according to the present utility model;

FIG. 4 is a schematic cross-sectional view of the body of the present utility model;

FIG. 5 is an enlarged schematic view of the structure of FIG. 4B according to the present utility model;

FIG. 6 is a schematic view of the circulation mechanism of the present utility model;

FIG. 7 is a schematic view of the auxiliary mechanism of the present utility model;

FIG. 8 is a schematic diagram of the output assembly of the present utility model;

FIG. 9 is a schematic view of the structure of the bearing frame of the present utility model;

fig. 10 is an enlarged schematic view of the structure of fig. 9C according to the present utility model.

In the figure: 1. a body; 101. a cleaning barrel; 102. a top cover; 103. support legs; 104. a support frame; 105. a cavity; 106. a liquid inlet pipe; 107. a spray head; 108. a liquid outlet pipe; 109. a first connection base; 110. a first transmission member; 111. an eccentric wheel; 112. a chute; 2. a circulation mechanism; 201. a storage tank; 202. an injection tube; 203. a discharge pipe; 204. an extraction tube; 205. a circulation pump; 206. a first connection pipe; 207. a filtering device; 208. a second connection pipe; 3. an auxiliary mechanism; 31. a power assembly; 311. a power member; 312. a transmission gear; 32. a transmission assembly; 321. a gear ring; 322. a slider; 323. a planetary gear; 324. a second transmission member; 33. an output assembly; 331. an intermittent gear; 332. a rotating seat; 333. a flexible column; 334. a first elastic member; 335. a second connecting seat; 4. a bearing bracket; 401. a connecting shaft; 402. a handle; 403. a connector; 404. a cross bar; 405. a supporting member; 406. a second elastic member; 407. and a fixing hook.

Detailed Description

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.

Additional aspects and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

As shown in fig. 1-3, a cleaning device for the outer surface of a bearing comprises a body 1, a circulating mechanism 2, an auxiliary mechanism 3 and a bearing frame 4, wherein the circulating mechanism 2 is arranged on one side of the body 1, the auxiliary mechanism 3 is arranged at the bottom of the body 1, the bearing frame 4 is arranged at the top of the auxiliary mechanism 3, and the bearing frame 4 is positioned in the body 1;

As shown in fig. 4 and 5, the body 1 includes a cleaning barrel 101, a top cover 102, supporting legs 103, a supporting frame 104, a cavity 105, a liquid inlet pipe 106, a spray nozzle 107, a liquid outlet pipe 108, a first connecting seat 109, a first transmission member 110, an eccentric wheel 111 and a chute 112, wherein the top of the cleaning barrel 101 is provided with the top cover 102, the bottom of the cleaning barrel 101 is provided with the supporting legs 103, the supporting frame 104 is fixedly connected to the supporting legs 103, the cavity 105 is arranged in the barrel wall of the cleaning barrel 101, the liquid inlet pipe 106 and the liquid outlet pipe 108 are fixedly connected to the upper part of the cleaning barrel 101, the liquid inlet pipe 106 is communicated with the cavity 105, one end of the liquid outlet pipe 108 is communicated with the bottom of the cleaning barrel 101, the spray nozzle 107 is arranged in the cleaning barrel 101, the spray nozzle 107 is communicated with the cavity 105, the spray nozzle 107 is a plurality of the circular arrays are arranged in the cleaning barrel 101, the first connecting seat 109 is fixedly arranged in the cleaning barrel 101, the first transmission member 110 is arranged on the first connecting seat 109, one end of the first transmission member 110 is fixedly connected with the eccentric wheel 111, and the chute 112 is arranged at the bottom of the cleaning barrel 101;

As shown in fig. 2 and 6, the circulation mechanism 2 comprises a storage tank 201, an injection pipe 202, a discharge pipe 203, an extraction pipe 204, a circulation pump 205, a first connecting pipe 206, a filtering device 207 and a second connecting pipe 208, wherein one side of the top of the storage tank 201 is fixedly connected with the injection pipe 202, the bottom of one side of the storage tank 201 is fixedly connected with the discharge pipe 203, the storage tank 201 is fixedly connected with the extraction pipe 204, one end of the extraction pipe 204, which is far away from the storage tank 201, is provided with the circulation pump 205, the output end of the circulation pump 205 is fixedly connected with the first connecting pipe 206, the first connecting pipe 206 is connected with one end of the liquid inlet pipe 106, which is far away from the cleaning barrel 101, the top of the storage tank 201 is provided with the filtering device 207, the input end of the filtering device 207 is provided with the second connecting pipe 208, and the second connecting pipe 208 is connected with one end of the liquid outlet pipe 108, which is far away from the cleaning barrel 101;

As shown in fig. 2, 3 and 7, the auxiliary mechanism 3 comprises a power assembly 31, a transmission assembly 32 and an output assembly 33, wherein the power assembly 31 is fixedly arranged on a supporting frame 104, the transmission assembly 32 is arranged at the output end of the power assembly 31, the power assembly 31 is connected with the output assembly 33 through the transmission assembly 32 in a transmission manner, and the transmission assembly 32 and the output assembly 33 are movably connected with the cleaning barrel 101;

As shown in fig. 7, the power assembly 31 includes a power member 311 and a transmission gear 312, the power member 311 is fixedly mounted on the support frame 104, and the output end of the power member 311 is provided with the transmission gear 312;

As shown in fig. 2, 3 and 7, the transmission assembly 32 comprises a gear ring 321, a sliding part 322, a planetary gear 323 and a second transmission part 324, the outer side of the gear ring 321 is full of gear teeth, the inner side of the gear ring 321 is not full of gear teeth, the transmission gear 312 is positioned at the outer side of the gear ring 321, the gear ring 321 is in transmission connection with the transmission gear 312, the sliding part 322 is fixedly connected to the gear ring 321, the sliding part 322 is positioned in the chute 112, the gear ring 321 is movably connected with the cleaning barrel 101 through the sliding part 322, the inner side of the gear ring 321 is provided with the planetary gear 323, the planetary gear 323 is in transmission connection with the gear ring 321, the planetary gear 323 is provided with a second transmission part 324, the second transmission part 324 is in transmission connection with the first transmission part 110, and the planetary gear 323 is in rotation connection with the bottom of the cleaning barrel 101 through the second transmission part 324;

As shown in fig. 7 and 8, the output assembly 33 includes an intermittent gear 331, a rotating seat 332, a flexible column 333, a first elastic member 334 and a second connecting seat 335, the intermittent gear 331 is in transmission connection with the planetary gear 323, one end of the intermittent gear 331 is fixedly connected with the rotating seat 332, the rotating seat 332 is rotatably connected inside the cleaning barrel 101, the top of the rotating seat 332 is provided with the flexible column 333 and the first elastic member 334, the rotating seat 332 is fixedly connected with the second connecting seat 335 through the flexible column 333 and the first elastic member 334, and the eccentric wheel 111 is positioned between the rotating seat 332 and the second connecting seat 335;

As shown in fig. 3, 9 and 10, the bearing frame 4 comprises a connecting shaft 401, a handle 402, a connector 403, a cross rod 404, a supporting member 405, a second elastic member 406 and a fixing hook 407, wherein the handle 402 is arranged at one end of the connecting shaft 401, the connector 403 is fixedly connected with one end of the connecting shaft 401 far away from the handle 402, the connecting shaft 401 is installed on the second connecting seat 335 through the connector 403, the cross rod 404 is fixedly connected with the cross rod 404, a connecting groove is formed in the cross rod 404, the supporting member 405 is slidingly connected with the cross rod 404 through the connecting groove, the second elastic member 406 is arranged between the supporting member 405 and the cross rod 404, the second elastic member 406 is positioned inside the connecting groove, and the fixing hook 407 is fixedly connected with the cross rod 404.

The working process of the utility model is as follows:

S1, before use, cleaning liquid is injected into a storage tank 201 through an injection pipe 202;

S2, when the bearing bracket is used, the top cover 102 is opened, the bearing bracket 4 is taken out from the body 1, then the supporting piece 405 is slid, the supporting piece 405 is close to the fixed hook 407, the second elastic piece 406 is contracted, a bearing to be cleaned is sleeved on the supporting piece 405 and the fixed hook 407, the supporting piece 405 is loosened, the second elastic piece 406 rebounds to drive the supporting piece 405 to move, and the supporting piece 405 fixes the bearing on the fixed hook 407;

S3, then the bearing frame 4 is put back into the cleaning barrel 101 and fixed on the second connecting seat 335, the top cover 102 is closed, the circulating pump 205 and the power assembly 31 are started, the cleaning liquid in the storage tank 201 is injected into the cavity 105 through the first connecting pipe 206 and the liquid inlet pipe 106 by the circulating pump 205, and then the cleaning liquid is sprayed onto the bearing by the spray head 107, so that the bearing is cleaned;

S4, the power assembly 31 drives the gear ring 321 to rotate, the gear ring 321 intermittently drives the planetary gears 323 to rotate, the planetary gears 323 drive the rotating seat 332 to rotate through the intermittent gears 331, the rotating seat 332 drives the second connecting seat 335 to rotate through the flexible column 333, and the second connecting seat 335 drives the bearing to rotate through the bearing frame 4;

S5, simultaneously, the planetary gear 323 drives the first transmission piece 110 to rotate through the second transmission piece 324, the first transmission piece 110 drives the eccentric wheel 111 to rotate, the eccentric wheel 111 pushes the second connecting seat 335 to deflect, the deflection degree continuously changes along with the rotation of the eccentric wheel 111, the second connecting seat 335 drives the bearing frame 4 to rotate and continuously changes deflection, so that cleaning liquid sprayed from the spray head 107 can be sprayed to the outer surface of the bearing more uniformly, and the spray head 107 can directly spray and wash rolling pieces of the bearing along with the change of the deflection degree;

S6, the cleaning solution sprayed on the bearing falls to the bottom of the cleaning barrel 101 along with the impurities on the bearing, flows out along the liquid outlet pipe 108, flows into the filtering device 207 along the second connecting pipe 208, flows back into the storage box 201 for recycling after being filtered by the filtering device 207.

Compared with the prior art, the utility model has the following beneficial effects compared with the prior art:

this bearing surface cleaning device through setting up complementary unit 3, when using, and the second connecting seat 335 appears constantly changing the skew when driving bearing frame 4 pivoted to make from the surface that spray head 107 department spun washing liquid can more even spray the bearing, avoid appearing having the condition at the dead angle that can't spray between the adjacent bearing, simultaneously, along with the change of skew degree, make spray head 107 can directly spray the washing to the rolling element of bearing, thereby improved the cleaning performance to the bearing.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims.

Claims

1. The utility model provides a bearing surface cleaning device, includes body (1) and circulation mechanism (2), its characterized in that: the circulating mechanism (2) is arranged on one side of the body (1), the auxiliary mechanism (3) is arranged at the bottom of the body (1), the bearing frame (4) is arranged at the top of the auxiliary mechanism (3), and the bearing frame (4) is positioned in the body (1);

The cleaning device comprises a body (1), and is characterized in that the body (1) comprises a cleaning barrel (101), a supporting frame (104) is arranged at the bottom of the cleaning barrel (101), a first connecting seat (109) is fixedly arranged in the cleaning barrel (101), a first transmission part (110) is arranged on the first connecting seat (109), one end of the first transmission part (110) is fixedly connected with an eccentric wheel (111), and a sliding groove (112) is formed in the bottom of the cleaning barrel (101);

The auxiliary mechanism (3) comprises a power assembly (31), the power assembly (31) is fixedly arranged on the supporting frame (104), a transmission assembly (32) is arranged at the output end of the power assembly (31), the power assembly (31) is connected with an output assembly (33) through the transmission assembly (32), and the transmission assembly (32) and the output assembly (33) are movably connected with the cleaning barrel (101);

The output assembly (33) comprises an intermittent gear (331), one end fixedly connected with of intermittent gear (331) rotates seat (332), rotate seat (332) and rotate and connect the inside of cleaning barrel (101), the top of rotating seat (332) is provided with flexible post (333) and first elastic component (334), rotate seat (332) through flexible post (333) with first elastic component (334) fixedly connected with second connecting seat (335), eccentric wheel (111) are located rotate between seat (332) and second connecting seat (335).

2. A bearing outer surface cleaning apparatus as defined in claim 1, wherein: a cavity (105) is formed in the barrel wall of the cleaning barrel (101), a liquid inlet pipe (106) and a liquid outlet pipe (108) are fixedly connected to the cleaning barrel (101), and a spray head (107) is arranged in the cleaning barrel (101).

3. A bearing outer surface cleaning apparatus as defined in claim 2, wherein: circulation mechanism (2) are including bin (201), one side fixedly connected with injection pipe (202) at bin (201) top, the bottom fixedly connected with discharge pipe (203) of bin (201) one side, fixedly connected with extraction pipe (204) on bin (201), extraction pipe (204) are kept away from the one end of bin (201) is provided with circulating pump (205), the output fixedly connected with first connecting pipe (206) of circulating pump (205), first connecting pipe (206) with feed liquor pipe (106) are kept away from the one end of cleaning barrel (101) is connected, the top of bin (201) is provided with filter equipment (207), the input of filter equipment (207) is provided with second connecting pipe (208), second connecting pipe (208) with the one end that cleaning barrel (101) was kept away from to drain pipe (108) is connected.

4. A bearing outer surface cleaning apparatus as defined in claim 1, wherein: the power assembly (31) comprises a power piece (311), and a transmission gear (312) is arranged at the output end of the power piece (311).

5. A bearing outer surface cleaning apparatus as defined in claim 4, wherein: the transmission assembly (32) comprises a gear ring (321), a sliding part (322) is fixedly connected to the gear ring (321), the sliding part (322) is located inside the sliding groove (112), the gear ring (321) is movably connected with the cleaning barrel (101) through the sliding part (322), a planetary gear (323) is arranged on the inner side of the gear ring (321), the planetary gear (323) is in transmission connection with the intermittent gear (331), a second transmission part (324) is arranged on the planetary gear (323), the second transmission part (324) is in transmission connection with the first transmission part (110), and the planetary gear (323) is in rotation connection with the bottom of the cleaning barrel (101) through the second transmission part (324).

6. A bearing outer surface cleaning apparatus as defined in claim 1, wherein: the bearing bracket (4) comprises a connecting shaft (401), one end of the connecting shaft (401) is provided with a handle (402), one end fixedly connected with connector (403) of the handle (402) is kept away from to the connecting shaft (401), the connecting shaft (401) is installed on a second connecting seat (335) through the connector (403), a cross rod (404) is fixedly connected to the connecting shaft (401), a connecting groove is formed in the cross rod (404), the cross rod (404) is provided with a supporting piece (405) through the connecting groove in a sliding mode, a second elastic piece (406) is arranged between the supporting piece (405) and the cross rod (404), the second elastic piece (406) is located inside the connecting groove, and a fixing hook (407) is fixedly connected to the cross rod (404).

7. A bearing outer surface cleaning apparatus as defined in claim 5, wherein: gear teeth are fully distributed on the outer side of the gear ring (321), gear teeth are not fully distributed on the inner side of the gear ring (321), the transmission gear (312) is located on the outer side of the gear ring (321), and the gear ring (321) is in transmission connection with the transmission gear (312).