CN220227762U - Single-input symmetrical double-output speed reducer and anchoring equipment - Google Patents

Abstract

The utility model discloses a single-input symmetrical double-output speed reducer and anchor-twisting equipment. Wherein, the two output gear train components and the two connecting and separating structures are arranged in a one-to-one correspondence manner; the input gear train assembly comprises an input shaft and an intermediate shaft which are rotationally connected to the box body, the input shaft is in transmission connection with the intermediate shaft, the two output gear train assemblies are symmetrically distributed on two sides of the intermediate shaft along the axial direction, and the two connecting and separating structures are symmetrically distributed on two sides of the intermediate shaft along the axial direction; the connection and disconnection structure is configured to be able to connect or disconnect the intermediate shaft and the input end of the output train assembly. The service performance of the single-input symmetrical double-output speed reducer is effectively improved, the single-input symmetrical double-output speed reducer is compact in structure, and the size of the single-input symmetrical double-output speed reducer can be reduced.

Description

Single-input symmetrical double-output speed reducer and anchoring equipment

Technical Field

The utility model relates to the technical field of speed reducers, in particular to a single-input symmetrical double-output speed reducer and anchor twisting equipment.

Background

The anchoring equipment is a common marine machine, is mainly used for winding and unwinding an anchor chain on a ship so as to realize the anchor lifting operation and the anchor unwinding operation, is usually arranged on a deck of a bow, can be divided into manual, electric and hydraulic types according to a driving mode, and can be used as a winch. At present, the electric anchoring equipment is most widely applied in the marine industry, and is usually arranged on a speed reducer due to the working characteristic requirement.

In the prior art, the single-input symmetrical double-output speed reducer has compact structural arrangement, and can realize single-input double-output, but the single-input symmetrical double-output speed reducer has the advantages that two output shafts can only synchronously output, so that the single-input symmetrical double-output speed reducer has poor service performance.

Disclosure of Invention

The utility model aims to provide a single-input symmetrical double-output speed reducer and anchor-winded equipment, which are used for solving the problem that the service performance of the single-input symmetrical double-output speed reducer is poor because two output shafts of the single-input symmetrical double-output speed reducer in the prior art can only synchronously output.

To achieve the purpose, the utility model adopts the following technical scheme:

the single-input symmetrical double-output speed reducer comprises a box body, and an input gear train assembly, two output gear train assemblies and two connecting and separating structures which are arranged on the box body, wherein the two output gear train assemblies and the two connecting and separating structures are arranged in a one-to-one correspondence manner;

the input gear train assembly comprises an input shaft and an intermediate shaft which are rotationally connected with the box body, the input shaft is in transmission connection with the intermediate shaft, the two output gear train assemblies are symmetrically distributed on two sides of the intermediate shaft along the axial direction, and the two connecting and separating structures are symmetrically distributed on two sides of the intermediate shaft along the axial direction;

the connection and disconnection structure is configured to be able to connect or disconnect the intermediate shaft and an input end of the output train assembly.

Preferably, the output gear train assembly comprises a first transmission shaft and an output shaft which are rotatably connected to the box body, the first transmission shaft is in transmission connection with the output shaft, and the central axis of the first transmission shaft is collinear with the central axis of the intermediate shaft;

the connecting and separating structure can connect or separate the intermediate shaft and the first transmission shaft.

Preferably, the two ends of the intermediate shaft along the axial direction are respectively provided with a first spline shaft section, one end of the first transmission shaft, which is close to the intermediate shaft along the axial direction, is provided with a second spline shaft section, and the first spline shaft section and the second spline shaft section are axially distributed at intervals;

the connecting and separating structure comprises a driving assembly and a spline housing, wherein the driving assembly can drive the spline housing to slide between the first spline shaft section and the second spline shaft section.

Preferably, the driving assembly comprises a deflector rod, a connecting shaft, a shifting fork frame and a bearing, wherein the connecting shaft is rotationally connected to the box body, two ends of the connecting shaft are respectively fixedly connected with the deflector rod and the shifting fork frame, an inner ring of the bearing is fixedly connected with the spline housing, and an outer ring of the bearing is movably connected with the shifting fork frame.

Preferably, the shifting fork frame is arc-shaped, and two free ends of the shifting fork frame are respectively provided with a U-shaped groove extending outwards along the circumferential direction;

the outer peripheral surface of the outer ring of the bearing is provided with two poking columns at intervals along the circumferential direction, the two U-shaped grooves and the two poking columns are arranged in a one-to-one correspondence mode, and the poking columns are distributed in the U-shaped grooves.

Preferably, the connection and disconnection structure further comprises a locking assembly, wherein the locking assembly comprises a locking rod and a locking plate arranged on the box body, and the locking rod is arranged on the deflector rod and can be inserted into the locking plate.

Preferably, the shift lever is provided with a first jack, the locking plate is provided with three second jacks, and the locking lever is inserted into the first jack and can be inserted into one of the second jacks.

Preferably, the locking plate is further provided with three proximity switches, and the three proximity switches are arranged in one-to-one correspondence with the three second jacks.

Preferably, the length of the spline housing is smaller than or equal to the length of the first spline shaft section, and smaller than or equal to the length of the second spline shaft section.

The anchoring equipment comprises a driving motor, two hawse pipes and the single-input symmetrical double-output speed reducer, wherein the two hawse pipes and the two output gear train assemblies are arranged in one-to-one correspondence, an output shaft of the driving motor is in transmission connection with the input shaft, and an output end of the output gear train assembly is in transmission connection with the hawse pipes.

The utility model has the beneficial effects that:

the utility model aims to provide a single-input symmetrical double-output speed reducer and anchor-twisting equipment. When the input shaft is driven to rotate around the central axis of the input shaft, the input shaft drives the intermediate shaft to rotate around the central axis of the input shaft, and the connection and separation structure can connect or separate the intermediate shaft and the input ends of the output gear train assemblies, so that the intermediate shaft can drive one of the output gear train assemblies to operate, and the intermediate shaft can also drive the two output gear train assemblies to operate synchronously. Secondly, set up two output train subassemblies symmetric distribution in the jackshaft along axial both sides, and two connection separation structures symmetric distribution in the jackshaft along axial both sides for this single input symmetry dual output speed reducer's structure is compacter, can reduce this single input symmetry dual output speed reducer's volume.

Drawings

FIG. 1 is a schematic structural diagram of a single-input symmetrical dual-output speed reducer according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a portion of a single-input symmetrical dual-output speed reducer according to an embodiment of the present utility model;

FIG. 3 is a partial cross-sectional view of a single input symmetric dual output speed reducer provided in an embodiment of the utility model;

FIG. 4 is a partial cross-sectional view II of a single input symmetric dual output speed reducer provided by an embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a fork frame of a single-input symmetrical dual-output speed reducer according to an embodiment of the present utility model.

In the figure:

1. a case;

2. an input train assembly; 21. an input shaft; 22. an intermediate shaft; 221. a first spline shaft section; 23. a first bevel gear; 24. a second drive shaft; 25. a second bevel gear; 26. a second spur gear;

3. an output train assembly; 31. a first drive shaft; 311. a second spline shaft section; 32. an output shaft; 33. a third spur gear; 34. a fourth spur gear;

4. a connection and separation structure; 41. a deflector rod; 42. a connecting shaft; 43. a fork frame; 431. a U-shaped groove; 44. a bearing; 45. a poking column; 46. connecting sleeves; 47. a spline housing; 48. a locking lever; 49. a locking plate; 491. a second jack; 50. a proximity switch; 51. an elastic member.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The utility model provides a single-input symmetrical double-output speed reducer, which comprises a box body 1, an input gear train component 2, two output gear train components 3 and two connecting and separating structures 4, wherein the input gear train component 2, the two output gear train components 3 and the two connecting and separating structures 4 are arranged on the box body 1, as shown in fig. 1-3. Wherein, the two output gear train components 3 and the two connecting and separating structures 4 are arranged in a one-to-one correspondence; the input gear train assembly 2 comprises an input shaft 21 and an intermediate shaft 22 which are rotatably connected to the box body 1, the input shaft 21 is in transmission connection with the intermediate shaft 22, the two output gear train assemblies 3 are symmetrically distributed on two sides of the intermediate shaft 22 along the axial direction, and the two connecting and separating structures 4 are symmetrically distributed on two sides of the intermediate shaft 22 along the axial direction; the connection and disconnection structure 4 is configured to be able to connect or disconnect the intermediate shaft 22 and the input end of the output train assembly 3.

As shown in fig. 1-3, the two output gear train assemblies 3 and the two connecting and separating structures 4 are arranged in a one-to-one correspondence, when the input shaft 21 is driven to rotate around the central axis of the input shaft, the input shaft 21 drives the intermediate shaft 22 to rotate around the central axis of the input shaft, the connecting and separating structures 4 can connect or separate the intermediate shaft 22 and the input ends of the output gear train assemblies 3, so that the intermediate shaft 22 can drive one of the output gear train assemblies 3 to operate, and the intermediate shaft 22 can also drive the two output gear train assemblies 3 to operate synchronously. Secondly, two output gear train assemblies 3 are symmetrically distributed on two sides of the intermediate shaft 22 along the axial direction, and two connecting and separating structures 4 are symmetrically distributed on two sides of the intermediate shaft 22 along the axial direction, so that the structure of the single-input symmetrical double-output speed reducer is more compact, and the volume of the single-input symmetrical double-output speed reducer can be reduced.

Specifically, in the present embodiment, as shown in fig. 2, two connection-disconnection structures 4 are distributed between two output train assemblies 3.

1-3, the output gear train assembly 3 comprises a first transmission shaft 31 and an output shaft 32 rotatably connected to the box body 1, the first transmission shaft 31 and the output shaft 32 are in transmission connection, and the central axis of the first transmission shaft 31 is collinear with the central axis of the intermediate shaft 22; the coupling and decoupling structure 4 is capable of coupling or decoupling the intermediate shaft 22 and the first transmission shaft 31. Specifically, when the input shaft 21 is driven to rotate around the central axis thereof, the input shaft 21 drives the intermediate shaft 22 to rotate around the central axis thereof, and the connection and separation structure 4 can connect or separate the intermediate shaft 22 and the first transmission shaft 31, so that the intermediate shaft 22 can drive the first transmission shaft 31 of one of the output gear train assemblies 3 to operate, and the output shaft 32 of the corresponding one of the output gear train assemblies 3 can rotate around the central axis thereof; the intermediate shaft 22 can also drive the first transmission shafts 31 of the two output gear train assemblies 3 to synchronously operate, so that the output shafts 32 of the two output gear train assemblies 3 rotate around the central axis of the output shafts; it is also possible to separate the intermediate shaft 22 from both the first drive shafts 31, and at this time, both the output shafts 32 of the single-input symmetrical double-output speed reducer are not rotated and are in a stationary state.

Specifically, as shown in fig. 2-4, both ends of the intermediate shaft 22 in the axial direction are provided with first spline shaft sections 221, one end of the first transmission shaft 31, which is axially close to the intermediate shaft 22, is provided with second spline shaft sections 311, and the first spline shaft sections 221 and the second spline shaft sections 311 are axially distributed at intervals; the connection and disconnection structure 4 includes a driving assembly and a spline housing 47, and the driving assembly can drive the spline housing 47 to slide between the first spline shaft section 221 and the second spline shaft section 311. The driving assembly is arranged to drive the spline housing 47 to slide between the first spline shaft section 221 and the second spline shaft section 311, so that the spline housing 47 can be sleeved on the first spline shaft section 221 only, can be sleeved on the second spline shaft section 311 only, and can also be sleeved on the first spline shaft section 221 and the second spline shaft section 311, and it is understood that when the spline housing 47 is sleeved on the first spline shaft section 221 only or the spline housing 47 is sleeved on the second spline shaft section 311 only, the first transmission shaft 31 and the intermediate shaft 22 are not connected, and at the moment, the intermediate shaft 22 cannot drive the first transmission shaft 31 to rotate around the central axis of the intermediate shaft; when the spline housing 47 is sleeved on the first spline shaft section 221 and the second spline shaft section 311, the spline housing 47 connects the first transmission shaft 31 and the intermediate shaft 22 at this time, so that the intermediate shaft 22 can drive the first transmission shaft 31 to rotate around the central axis of the intermediate shaft 22; secondly, the first spline shaft section 221 and the second spline shaft section 311 are arranged at intervals along the axial direction, and when the spline housing 47 is only sleeved on the first spline shaft section 221 or the spline housing 47 is only sleeved on the second spline shaft section 311, the intermediate shaft 22 is prevented from being worn mutually between the rotating process and the first transmission shaft 31.

Preferably, the axial spacing of the first and second spline shaft segments 221, 311 is substantially less than the axial length of the spline housing 47.

Preferably, the length of the spline housing 47 is equal to or less than the length of the first spline shaft section 221 and equal to or less than the length of the second spline shaft section 311. So that the spline housing 47 can be sleeved on the first spline shaft section 221 only or the second spline shaft section 311 only, and also so that the spline housing 47 can connect the first spline shaft section 221 and the second spline shaft section 311.

In the present embodiment, a first limit retainer ring is provided at the junction of the intermediate shaft 22 and the first spline shaft section 221, and a second limit retainer ring is provided at the junction of the first transmission shaft 31 and the second spline shaft section 311. The sliding range of the spline housing 47 in the axial direction of the intermediate shaft 22 can be defined. As an alternative, it is also possible to provide that the shaft diameter of the intermediate shaft 22, the outer diameter of the first spline shaft section 221, the shaft diameter of the first transmission shaft 31 and the outer diameter of the second spline shaft section 311 are all the same. The arrangement is such that the junction of the intermediate shaft 22 and the first spline shaft section 221 forms a first limiting end face, the junction of the first transmission shaft 31 and the second spline shaft section 311 forms a second limiting end face, and the sliding range of the spline housing 47 along the axial direction of the intermediate shaft 22 can be defined by the first limiting end face and the second limiting end face.

Further preferably, the first spline shaft section 221 is integrally formed with the intermediate shaft 22; the second spline shaft segment 311 is integrally formed with the first drive shaft 31. By the arrangement, the number of parts can be reduced, the assembly is convenient, the connection strength of the junction of the intermediate shaft 22 and the first spline shaft section 221 can be improved, and the connection strength of the junction of the first transmission shaft 31 and the second spline shaft section 311 can be improved.

As shown in fig. 1-5, the driving assembly includes a shift lever 41, a connecting shaft 42, a shift fork frame 43 and a bearing 44, the connecting shaft 42 is rotatably connected to the box 1, two ends of the connecting shaft 42 are fixedly connected with the shift lever 41 and the shift fork frame 43 respectively, an inner ring of the bearing 44 is fixedly connected with a spline housing 47, and an outer ring of the bearing 44 is movably connected with the shift fork frame 43. Specifically, when the shift lever 41 is shifted, the shift lever 41 drives the connecting shaft 42 to rotate around the central axis thereof, so as to drive the shift fork frame 43 to rotate around the central axis of the connecting shaft 42, and the outer ring of the bearing 44 is movably connected with the shift fork frame 43, so that the shift fork frame 43 pushes the bearing 44 and the spline housing 47 to synchronously move along the axial direction of the intermediate shaft 22 in the rotating process, and the spline housing 47 can slide between the first spline shaft section 221 and the second spline shaft section 311.

Specifically, as shown in fig. 3 to 5, the fork frame 43 has an arc shape, and both free ends of the fork frame 43 are respectively provided with a U-shaped groove 431 extending outwardly in the circumferential direction; the outer peripheral surface of the outer ring of the bearing 44 is provided with two poking posts 45 at intervals along the circumferential direction, the two U-shaped grooves 431 and the two poking posts 45 are arranged in a one-to-one correspondence manner, and the poking posts 45 are distributed in the U-shaped grooves 431. When the shift lever 41 is shifted, the shift lever 41 drives the connecting shaft 42 to rotate around the central axis of the connecting shaft 42, so that the shift fork frame 43 is driven to rotate around the central axis of the connecting shaft 42, the shift column 45 can slide along the inner peripheral wall of the U-shaped groove 431, and in the process that the shift column 45 slides along the inner peripheral wall of the U-shaped groove 431, the acting force applied by the shift fork frame 43 to the shift column 45 can push the shift column 45, the bearing 44 and the spline housing 47 to synchronously move along the axial direction of the intermediate shaft 22, so that the spline housing 47 can slide between the first spline shaft section 221 and the second spline shaft section 311. Preferably, the outer ring of the bearing 44 is fixedly sleeved with a connecting sleeve 46, and the shifting post 45 is detachably connected to the connecting sleeve 46. The connecting sleeve 46 can protect the bearing 44.

As shown in fig. 1-4, the connection and disconnection structure 4 further includes a locking assembly, where the locking assembly includes a locking lever 48, and a locking plate 49 disposed on the case 1, and the locking lever 48 is disposed on the lever 41 and can be inserted into the locking plate 49. When the distribution position of the spline housing 47 is adjusted by the driving assembly, the locking rod 48 is inserted into the locking plate 49, and the locking rod 48 and the locking plate 49 jointly define the distribution position of the deflector rod 41, so that the distribution position of the spline housing 47 is unchanged; when the distribution position of the spline housing 47 needs to be adjusted again, the locking rod 48 is pulled away from the locking plate 49, and the distribution position of the spline housing 47 can be adjusted by rotating the deflector rod 41.

Specifically, as shown in fig. 1 and 3, the lever 41 is provided with a first insertion hole, the lock plate 49 is provided with three second insertion holes 491, and the lock lever 48 is inserted into the first insertion hole and is insertable into one of the second insertion holes 491. The three second insertion holes 491 are respectively corresponding to the spline housing 47 and sleeved on the first spline shaft section 221 only, the spline housing 47 is sleeved on the second spline shaft section 311 only, and the spline housing 47 is sleeved on the first spline shaft section 221 and the second spline shaft section 311, and when the distribution position of the spline housing 47 is adjusted by the driving assembly, the corresponding second insertion holes 491 are inserted through the locking rods 48.

Further specifically, as shown in fig. 3, the locking assembly further includes an elastic member 51 disposed in the first jack, the locking rod 48 is disposed through the elastic member 51, and two ends of the elastic member 51 are fixedly connected with the driving lever 41 and the locking rod 48 respectively. The elastic member 51 can prevent the locking lever 48 from being separated from the driving lever 41, when the locking plate 49 is pulled away from the second insertion hole 491, the elastic member 51 is compressed, when the driving lever 41 is rotated to the corresponding position, the locking lever 48 is released, and the elastic restoring force of the elastic member 51 drives the locking lever 48 to be inserted into the corresponding second insertion hole 491 so as to lock the spline housing 47 to the corresponding position.

Preferably, as shown in fig. 1 and 3, three proximity switches 50 are further provided on the locking plate 49, and the three proximity switches 50 are disposed in one-to-one correspondence with the three second insertion holes 491. The proximity switch 50 is arranged, so that whether the shift lever 41 is shifted in place or not can be determined conveniently according to a signal sent by the proximity switch 50, and the shift lever 41 is prevented from being not shifted in place or being excessively shifted, so that the accuracy of adjusting the distribution position of the spline housing 47 is improved; it will be appreciated that the three proximity switches 50 are respectively sleeved on the first spline shaft section 221 corresponding to the spline housing 47, the spline housing 47 is sleeved on the second spline shaft section 311 only, and the spline housing 47 is sleeved on the first spline shaft section 221 and the second spline shaft section 311.

Specifically, the single-input symmetrical dual-output speed reducer further includes an alarm electrically connected to the proximity switch 50. The alarm can send out three different alarm signals corresponding to the three proximity switches 50 respectively, so as to better avoid that the deflector rod 41 is not dialed in place or is excessively dialed.

In this embodiment, as shown in fig. 1 and 2, the input gear train assembly 2 further includes a first bevel gear 23 fixedly disposed on the input shaft 21, a second transmission shaft 24, a second bevel gear 25 and a first spur gear fixedly disposed on the second transmission shaft 24 and spaced apart from each other, and a second spur gear 26 fixedly disposed on the intermediate shaft 22, wherein the first bevel gear 23 and the second bevel gear 25 are engaged, and the first spur gear and the second spur gear 26 are engaged. Specifically, when the input shaft 21 rotates about its central axis, the first bevel gear 23 and the second bevel gear 25 are brought into engagement, so that the first spur gear and the second spur gear 26 are brought into engagement, thereby bringing the intermediate shaft 22 into rotation about its central axis. It can be understood that the composition of the input gear train assembly 2 can be adaptively adjusted according to the actual working condition requirement, so that the input shaft 21 can drive the intermediate shaft 22 to rotate around the central axis thereof.

As shown in fig. 1 and 2, the output gear train assembly 3 includes a third spur gear 33 fixedly disposed on the first transmission shaft 31, and a fourth spur gear 34 fixedly disposed on the output shaft 32, and the third spur gear 33 and the fourth spur gear 34 are meshed. Specifically, when the intermediate shaft 22 drives the first transmission shaft 31 to rotate around its central axis, the third spur gear 33 and the fourth spur gear 34 are driven to mesh, thereby driving the output shaft 32 to rotate around its central axis. It can be understood that the composition of the output gear train assembly 3 can be adaptively adjusted according to the actual working condition requirement, so that the first transmission shaft 31 can drive the output shaft 32 to rotate around the central axis of the first transmission shaft.

The utility model also provides anchoring equipment, which comprises a driving motor, two hawse pipes and the single-input symmetrical double-output speed reducer, wherein the two hawse pipes and the two output gear train assemblies 3 are arranged in one-to-one correspondence, an output shaft of the driving motor is in transmission connection with the input shaft 21, and an output end of the output gear train assembly 3 is in transmission connection with the hawse pipes. Specifically, the output shaft of the driving motor is in transmission connection with the input shaft 21, the output shaft 32 is in transmission connection with the hawse pipes, the driving motor drives the input shaft 21 to rotate around the central axis of the driving motor, so that the intermediate shaft 22 is driven to rotate around the central axis of the driving motor, the intermediate shaft 22 can drive the first transmission shaft 31 to rotate around the central axis of the driving motor, so that the output shaft 32 is driven to rotate around the central axis of the driving motor, one hawse pipe can be driven to rotate, or both hawse pipes are driven to rotate, and the service performance of the anchoring equipment is improved.

Preferably, the drive motor is a servo motor. The use function of the anchoring equipment can be further improved.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. The single-input symmetrical double-output speed reducer is characterized by comprising a box body (1), and an input gear train assembly (2), two output gear train assemblies (3) and two connecting and separating structures (4) which are arranged on the box body (1), wherein the two output gear train assemblies (3) and the two connecting and separating structures (4) are arranged in a one-to-one correspondence manner;

the input gear train assembly (2) comprises an input shaft (21) and an intermediate shaft (22) which are rotatably connected to the box body (1), the input shaft (21) is in transmission connection with the intermediate shaft (22), the two output gear train assemblies (3) are symmetrically distributed on two sides of the intermediate shaft (22) along the axial direction, and the two connecting and separating structures (4) are symmetrically distributed on two sides of the intermediate shaft (22) along the axial direction;

the connection and disconnection structure (4) is configured to be able to connect or disconnect the intermediate shaft (22) and the input end of the output train assembly (3).

2. The single-input symmetrical double-output speed reducer according to claim 1, characterized in that the output train wheel assembly (3) comprises a first transmission shaft (31) and an output shaft (32) rotatably connected to the case (1), the first transmission shaft (31) and the output shaft (32) are in transmission connection, and the central axis of the first transmission shaft (31) is collinear with the central axis of the intermediate shaft (22);

the connecting and disconnecting structure (4) can connect or disconnect the intermediate shaft (22) and the first transmission shaft (31).

3. The single-input symmetrical double-output speed reducer according to claim 2, wherein both ends of the intermediate shaft (22) along the axial direction are provided with first spline shaft sections (221), one end of the first transmission shaft (31) along the axial direction, which is close to the intermediate shaft (22), is provided with second spline shaft sections (311), and the first spline shaft sections (221) and the second spline shaft sections (311) are distributed at intervals along the axial direction;

the connecting and separating structure (4) comprises a driving assembly and a spline housing (47), and the driving assembly can drive the spline housing (47) to slide between the first spline shaft section (221) and the second spline shaft section (311).

4. The single-input symmetrical double-output speed reducer according to claim 3, wherein the driving assembly comprises a deflector rod (41), a connecting shaft (42), a shifting fork frame (43) and a bearing (44), the connecting shaft (42) is rotatably connected to the box body (1), two ends of the connecting shaft (42) are fixedly connected with the deflector rod (41) and the shifting fork frame (43) respectively, an inner ring of the bearing (44) is fixedly connected with the spline housing (47), and an outer ring of the bearing (44) is movably connected with the shifting fork frame (43).

5. The single-input symmetrical double-output speed reducer according to claim 4, wherein the fork frame (43) is arc-shaped, and two free ends of the fork frame (43) are respectively provided with a U-shaped groove (431) extending outwards along the circumferential direction;

the outer peripheral surface of the outer ring of the bearing (44) is provided with two poking columns (45) at intervals along the circumferential direction, the two U-shaped grooves (431) and the two poking columns (45) are arranged in a one-to-one correspondence mode, and the poking columns (45) are distributed in the U-shaped grooves (431).

6. The single-input symmetrical double-output speed reducer according to claim 4, wherein the connecting and disconnecting structure (4) further comprises a locking assembly, the locking assembly comprises a locking rod (48) and a locking plate (49) arranged on the box body (1), and the locking rod (48) is arranged on the deflector rod (41) and can be inserted into the locking plate (49).

7. The single-input symmetrical double-output speed reducer according to claim 6, wherein the shift lever (41) is provided with a first jack, the locking plate (49) is provided with three second jacks (491), and the locking lever (48) is inserted into the first jack and can be inserted into one of the second jacks (491).

8. The single-input symmetrical double-output speed reducer according to claim 7, wherein the locking plate (49) is further provided with three proximity switches (50), and the three proximity switches (50) are arranged in one-to-one correspondence with the three second insertion holes (491).

9. The single input symmetric dual output speed reducer as claimed in any of claims 3-8, wherein the length of said spline housing (47) is equal to or less than the length of said first spline shaft section (221) and equal to or less than the length of said second spline shaft section (311).

10. The anchoring equipment comprises a driving motor, two hawse pipes and the single-input symmetrical double-output speed reducer as claimed in any one of claims 1-9, wherein the two hawse pipes and the two output gear train assemblies (3) are arranged in one-to-one correspondence, an output shaft of the driving motor is in transmission connection with the input shaft (21), and an output end of the output gear train assembly (3) is in transmission connection with the hawse pipes.