CN213981857U

CN213981857U - Conical gear staggered tooth speed reducer

Info

Publication number: CN213981857U
Application number: CN202022747905.9U
Authority: CN
Inventors: 王怡科
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-08-17
Anticipated expiration: 2030-11-24

Abstract

The utility model relates to a conical gear staggered tooth speed reducer, which comprises a casing, wherein the top and the bottom are respectively coaxially provided with an output shaft mounting hole; the upper end and the lower end of the planet carrier output shaft are respectively and coaxially and rotatably connected with the output shaft mounting holes at the upper part and the lower part, and the periphery of the planet carrier output shaft is provided with at least three connecting shafts extending along the radial direction at equal intervals along the circumferential direction; the output conical planetary gears are provided with at least three output conical planetary gears which are coaxially and rotatably arranged on the connecting shaft in a one-to-one correspondence manner; the inner edge of the lower end of the upper conical gear is provided with upper inner conical teeth meshed with the output conical planetary gear; the inner edge of the upper end of the lower conical gear is provided with lower inner conical teeth meshed with the output conical planetary gear, and the number of teeth of the upper inner conical teeth is consistent with that of the lower inner conical teeth; and the driving mechanism is arranged on the shell, the driving end of the driving mechanism extends into the shell, and the driving mechanism is in transmission connection with the upper conical gear and the lower conical gear respectively and is used for driving the upper conical gear and the lower conical gear to synchronously and reversely rotate. The advantages are that: the reducer is small in size and large in reduction ratio.

Description

Conical gear staggered tooth speed reducer

Technical Field

The utility model relates to a speed reducer technical field, in particular to bevel gear staggered teeth speed reducer.

Background

In the speed reducer family, planetary reducer is with its small, transmission efficiency is high, and the speed reduction scope is wide, a great deal of advantages such as precision height, and by the wide application, however, when the power of transmission is great, need increase the size of each part of speed reducer to improve the reduction ratio, like this, will increase the volume and the weight of speed reducer certainly, can't install in small-size equipment, do not accord with the miniaturized development trend of current equipment.

In summary, how to reduce the volume of the planetary reducer under the condition of obtaining a larger reduction ratio becomes a problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a bevel gear staggered teeth speed reducer is provided, the effectual defect of overcoming prior art.

The utility model provides an above-mentioned technical problem's technical scheme as follows:

a conical gear staggered tooth speed reducer comprises a shell, wherein output shaft mounting holes are respectively and coaxially formed in the top and the bottom of the shell; the planet carrier output shaft is vertically arranged, the upper end and the lower end of the planet carrier output shaft are respectively coaxially and rotatably connected with the output shaft mounting holes on the upper side and the lower side, and at least three connecting shafts extending along the radial direction of the planet carrier output shaft are arranged on the periphery of the planet carrier output shaft at equal intervals along the circumferential direction of the planet carrier output shaft; the output conical planetary gears are provided with at least three output conical planetary gears, and the output conical planetary gears are coaxially and rotatably arranged on the connecting shaft in a one-to-one correspondence manner; the upper conical gear is coaxially sleeved outside the output shaft of the planet carrier and is rotatably assembled in the shell at a position corresponding to the upper part of the output conical planetary gear, and the inner edge of the lower end of the upper conical gear is provided with upper inner conical teeth meshed with the output conical planetary gear; the lower conical gear is coaxially sleeved outside the output shaft of the planet carrier and can be rotatably assembled in the shell at a position corresponding to the lower part of the output conical planetary gear, the inner edge of the upper end of the lower conical gear is provided with lower inner conical teeth meshed with the output conical planetary gear, and the number of teeth of the upper inner conical teeth is consistent with that of the lower inner conical teeth; and the driving mechanism is arranged on the shell, the driving end of the driving mechanism extends into the shell and is in transmission connection with the upper bevel gear and the lower bevel gear respectively, and the driving mechanism is used for driving the upper bevel gear and the lower bevel gear to synchronously and reversely rotate.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Further, the driving mechanism comprises a first input shaft, a first-stage bevel gear and a second-stage bevel gear, an input shaft mounting hole is transversely formed in one side of the casing, the first input shaft is transversely arranged, one end of the first input shaft penetrates through the input shaft mounting hole and is rotatably connected with the first input shaft mounting hole, the first-stage bevel gear and the second-stage bevel gear are respectively coaxially fixed at the end of one end of the first input shaft at intervals, upper outer bevel teeth meshed with the first-stage bevel gear are arranged on the outer edge of the lower end of the upper bevel gear, lower outer bevel teeth meshed with the second-stage bevel gear are arranged on the outer edge of the upper end of the lower bevel gear, and the number of the upper outer bevel teeth is different from that of the lower outer bevel teeth.

Further, a first input shaft bearing rotatably fitted to the first input shaft is fitted in the input shaft mounting hole.

Further, the driving mechanism comprises a second input shaft, a first-stage spur gear and a second-stage spur gear, an input shaft mounting hole is formed in the position, close to the edge, of the top wall or the bottom wall of the casing, the second input shaft is vertically arranged, one end of the second input shaft penetrates through the input shaft mounting hole and is rotatably connected with the first-stage spur gear and the second-stage spur gear, the first-stage spur gear and the second-stage spur gear are fixed to the end portion of the end of the second input shaft at a coaxial interval respectively, a circle of outer teeth meshed with the first-stage spur gear are arranged on the periphery of the upper conical gear, an annular mounting disc is fixedly connected to the periphery of the lower conical gear, a circle of inner teeth coaxially arranged with the lower conical gear are fixed to the outer edge of the upper end of the mounting disc, the inner teeth are meshed with the second-stage spur gear, and the number of the outer teeth is inconsistent.

Further, an input shaft bearing rotatably fitted to the second input shaft is fitted in the input shaft mounting hole.

Furthermore, the output shaft mounting holes are respectively provided with second output shaft bearings which are in running fit with the upper end and the lower end of the output shaft of the planet carrier.

Furthermore, the top wall of the machine shell is provided with an upper bevel gear bearing, the upper end of the upper bevel gear is coaxially provided with an upper connecting sleeve, and the upper connecting sleeve extends into the inner ring of the upper bevel gear bearing and is fixedly connected with the inner ring of the upper bevel gear bearing.

Further, the bottom wall of the casing is provided with a lower bevel gear bearing, the lower end of the upper bevel gear is coaxially provided with a lower connecting sleeve, and the lower connecting sleeve extends into the inner ring of the lower bevel gear bearing and is fixedly connected with the inner ring of the lower bevel gear bearing.

Further, the casing includes a vertically arranged cylindrical housing, and an upper cover and a lower cover respectively assembled to the upper end and the lower end of the housing, and the upper cover and the lower cover are respectively provided with the output shaft mounting holes.

The utility model has the advantages that: structural design is reasonable, and whole speed reducer is small, and the reduction gear is great, does benefit to the miniaturized development of speed reducer.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of an internal transmission component of a bevel gear staggered tooth speed reducer according to the present invention;

fig. 2 is an exploded view of an embodiment of the bevel gear staggered teeth reducer of the present invention;

fig. 3 is a schematic structural diagram of another embodiment of an internal core component of the bevel gear staggered teeth speed reducer according to the present invention;

fig. 4 is an exploded view of another embodiment of the bevel gear staggered-tooth reducer of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a housing; 2. a planet carrier output shaft; 3. an output conical planetary gear; 4. an upper bevel gear; 5. a lower bevel gear; 6. a drive mechanism; 9. an output shaft bearing; 11. a housing; 12. an upper cover; 13. a lower cover; 41. upper outer bevel teeth; 42. an outer tooth; 43. an upper bevel gear bearing; 51. lower outer bevel teeth; 52. internal teeth; 53. a lower bevel gear bearing; 61. a first input shaft; 62. a primary bevel gear; 63. a secondary bevel gear; 64. a second input shaft; 65. a first-stage spur gear; 66. a second-stage spur gear; 611. a first input shaft bearing; 641. a second input shaft bearing.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

Example one

As shown in fig. 1 and 2, the bevel gear staggered-tooth reducer of the present embodiment includes a casing 1, and output shaft mounting holes are respectively and coaxially formed at the top and the bottom of the casing 1; the planet carrier output shaft 2 is vertically arranged, the upper end and the lower end of the planet carrier output shaft 2 are respectively coaxially and rotatably connected with the output shaft mounting holes on the upper side and the lower side, and at least three connecting shafts extending along the radial direction of the planet carrier output shaft 2 are arranged on the periphery of the planet carrier output shaft 2 at equal intervals along the circumferential direction; the output conical planetary gears 3 are provided with at least three output conical planetary gears 3, and the output conical planetary gears 3 are coaxially and rotatably arranged on the connecting shaft in a one-to-one correspondence manner; an upper conical gear 4, wherein the upper conical gear 4 is coaxially sleeved outside the planet carrier output shaft 2 and is rotatably assembled in the shell 1 at a position corresponding to the upper part of the output conical planetary gear 3, and the inner edge of the lower end of the upper conical gear 4 is provided with an upper inner conical tooth meshed with the output conical planetary gear 3; a lower conical gear 5, wherein the lower conical gear 5 is coaxially sleeved outside the planet carrier output shaft 2 and is rotatably assembled in the casing 1 at a position corresponding to the lower part of the output conical planetary gear 3, a lower inner conical tooth meshed with the output conical planetary gear 3 is arranged on the inner edge of the upper end of the lower conical gear 5, and the number of teeth of the upper inner conical tooth is consistent with that of the lower inner conical tooth; a driving mechanism 6, wherein the driving mechanism 6 is installed on the housing 1, a driving end of the driving mechanism 6 extends into the housing 1 and is in transmission connection with the upper bevel gear 4 and the lower bevel gear 5 respectively, and the driving mechanism 6 is used for driving the upper bevel gear 4 and the lower bevel gear 5 to synchronously rotate in opposite directions;

specifically, the driving mechanism 6 includes a first input shaft 61, a first-stage bevel gear 62 and a second-stage bevel gear 63, one side of the housing 1 is transversely provided with an input shaft mounting hole, the first input shaft 61 is transversely disposed, one end of the first input shaft passes through the input shaft mounting hole and is rotatably connected to the first input shaft mounting hole, the first-stage bevel gear 62 and the second-stage bevel gear 63 are respectively coaxially fixed at an end of the first input shaft 61 at intervals, an upper outer bevel gear 41 engaged with the first-stage bevel gear 62 is disposed on an outer edge of a lower end of the upper bevel gear 4, a lower outer bevel gear 51 engaged with the second-stage bevel gear 63 is disposed on an outer edge of an upper end of the lower bevel gear 5, and the number of teeth of the upper outer bevel gear 41 is different from that of the lower outer bevel gear 51.

In the present embodiment, the numbers of teeth of the upper outer conical teeth 41 and the lower outer conical teeth 51, and the numbers of teeth of the primary conical gear 62 and the secondary conical gear 63 are not the same; and the amplitude of the respective reverse rotation of the lower bevel gear 5 and the upper bevel gear 4 is also different, as shown in fig. 1, the second-stage bevel gear 63 is located inside the first-stage bevel gear 62 (the internal-external relation based on the center of the planet carrier output shaft 2), and the specific transmission process is as follows:

when the first input shaft 61 drives the first-stage conical gear 62 and the second-stage conical gear 63 to rotate, the lower conical gear 5 and the upper conical gear 4 which are respectively engaged with the first-stage conical gear 62 and the second-stage conical gear 63 are driven to respectively rotate clockwise and counterclockwise, and the engaged output conical planetary gear 3 is pushed to rotate through the lower inner conical teeth of the lower conical gear 5 and the upper inner conical teeth of the upper conical gear 4, because the upper outer conical teeth 41 and the lower outer conical teeth 51, the first-stage conical gear 62 and the second-stage conical gear 63 are not consistent in tooth number, the amplitude of the respective reverse rotation of the lower conical gear 5 and the upper conical gear 4 is not consistent, the engaged output conical planetary gear 3 is forced to revolve around the planet carrier output shaft 2, and finally the planet carrier output shaft 5 is pushed to rotate.

One parameter for the number of teeth is specified below:

the number of teeth of the first-stage bevel gear 62 is 16, the number of teeth of the second-stage bevel gear 63 is 14, the number of teeth of the upper outer bevel gear 41 is 80, the number of teeth of the lower outer bevel gear 51 is 70, the number of teeth of the upper inner bevel gear and the lower inner bevel gear is 50, and the number of teeth of the output conical planetary gear 3 is 15.

It should be noted that: the arrows in fig. 1 indicate the direction of rotation of the relevant components, and S in fig. 2 indicates the axis of the planet carrier output shaft 2 of the reducer.

Preferably, a first input shaft bearing 611 rotatably fitted to the first input shaft 61 is fitted to the input shaft mounting hole.

In the preferred embodiment, a vertical mounting plate is fixed at the mounting hole of the input shaft, and the first input shaft 61 passes through the mounting hole adapted on the mounting plate and is connected and matched with the first input shaft bearing 611 in the mounting hole, so that good and stable rotation is realized.

Example two

As shown in fig. 3 and 4, the bevel gear staggered-tooth reducer of the present embodiment includes a casing 1, and output shaft mounting holes are respectively and coaxially formed at the top and the bottom of the casing 1; the planet carrier output shaft 2 is vertically arranged, the upper end and the lower end of the planet carrier output shaft 2 are respectively coaxially and rotatably connected with the output shaft mounting holes on the upper side and the lower side, and at least three connecting shafts extending along the radial direction of the planet carrier output shaft 2 are arranged on the periphery of the planet carrier output shaft 2 at equal intervals along the circumferential direction; the output conical planetary gears 3 are provided with at least three output conical planetary gears 3, and the output conical planetary gears 3 are coaxially and rotatably arranged on the connecting shaft in a one-to-one correspondence manner; an upper conical gear 4, wherein the upper conical gear 4 is coaxially sleeved outside the planet carrier output shaft 2 and is rotatably assembled in the shell 1 at a position corresponding to the upper part of the output conical planetary gear 3, and the inner edge of the lower end of the upper conical gear 4 is provided with an upper inner conical tooth meshed with the output conical planetary gear 3; a lower conical gear 5, wherein the lower conical gear 5 is coaxially sleeved outside the planet carrier output shaft 2 and is rotatably assembled in the casing 1 at a position corresponding to the lower part of the output conical planetary gear 3, a lower inner conical tooth meshed with the output conical planetary gear 3 is arranged on the inner edge of the upper end of the lower conical gear 5, and the number of teeth of the upper inner conical tooth is consistent with that of the lower inner conical tooth; a driving mechanism 6, wherein the driving mechanism 6 is installed on the housing 1, a driving end of the driving mechanism 6 extends into the housing 1 and is in transmission connection with the upper bevel gear 4 and the lower bevel gear 5 respectively, and the driving mechanism 6 is used for driving the upper bevel gear 4 and the lower bevel gear 5 to synchronously rotate in opposite directions;

specifically, the above-described drive mechanism 6 includes a second input shaft 64, a primary spur gear 65, and a secondary spur gear 66, an input shaft mounting hole is formed on the top wall or the bottom wall of the machine shell 1 near the edge, the second input shaft 64 is vertically arranged, one end of the first-stage spur gear 65 and the second-stage spur gear 66 are respectively fixed on one end of the second input shaft 64 at a coaxial interval, the outer circumference of the upper bevel gear 4 is provided with a ring of outer teeth 42 engaged with the primary spur gear 65, an annular mounting disc is fixedly connected to the periphery of the lower conical gear 5, a circle of internal teeth 52 which are coaxially arranged with the lower conical gear 5 are fixed at the outer edge of the upper end of the mounting disc, the internal teeth 52 are engaged with the secondary spur gear 66, and the number of teeth of the external teeth 42 and the internal teeth 52 is not the same.

In the present embodiment, the outer teeth 42 are not coincident with the inner teeth 52; and the amplitude of the respective reverse rotation of the lower bevel gear 5 and the upper bevel gear 4 is different, the tooth numbers of the first-stage spur gear 65 and the second-stage spur gear 66 can be consistent and are produced in a connected manner, as shown in fig. 3, the first-stage spur gear 65 is positioned above the second-stage spur gear 66, and the specific transmission process is as follows:

when the second input shaft 64 drives the first-stage spur gear 65 and the second-stage spur gear 66 to rotate, the external teeth 42 and the internal teeth 52 which are respectively meshed with the first-stage spur gear 65 and the second-stage spur gear 66 are driven to respectively rotate clockwise and counterclockwise, and the meshed output conical planetary gear 3 is pushed to rotate through the lower internal conical teeth of the lower conical gear 5 and the upper internal conical teeth of the upper conical gear 4, because the number of teeth of the external teeth 42 and the number of teeth of the internal teeth 52 are inconsistent, and the amplitude of respective reverse rotation of the lower conical gear 5 and the upper conical gear 4 is inconsistent, the meshed output conical planetary gear 3 is forced to revolve around the planet carrier output shaft 2, and finally the planet carrier output shaft 5 is pushed to rotate.

One parameter for the number of teeth is specified below:

the number of teeth of the first-stage straight gear 65 is 16, the number of teeth of the second-stage straight gear 66 is 14, the number of teeth of the outer gear 42 is 70, the number of teeth of the inner gear 52 is 90, the number of teeth of the upper and lower inner bevel gears is 50, and the number of teeth of the output conical planetary gear 3 is 15.

The arrows in FIG. 3 indicate the rotation direction of the relevant components, and the line L in FIG. 4 indicates the axis of the output shaft of the planet carrier

Preferably, a second input shaft bearing 641 rotatably engaged with the second input shaft 64 is fitted in the input shaft mounting hole.

In this preferred embodiment, a vertical mounting plate is fixed at the mounting hole of the input shaft, and the second input shaft 64 passes through the mounting hole adapted on the mounting plate and is connected and matched with the second input shaft bearing 641 in the mounting hole, so as to realize good and stable rotation.

On the basis of the two embodiments, at least the following specific preferred embodiments can be provided:

in the first scheme, output shaft bearings 9 which are in running fit with the upper end and the lower end of the planet carrier output shaft 2 are respectively assembled in the output shaft mounting holes.

In the scheme, the upper end and the lower end of the planet carrier output shaft 2 are respectively connected and assembled with the output shaft bearing 9 in the output shaft mounting hole, so that good and stable rotation power output is realized.

And in the second scheme, the top wall of the machine shell 1 is provided with an upper conical gear bearing 43, the upper end of the upper conical gear 4 is coaxially provided with an upper connecting sleeve, and the upper connecting sleeve extends into the inner ring of the upper conical gear bearing 43 and is fixedly connected with the upper conical gear bearing.

In this scheme, go up bevel gear 4 and rotate through last bevel gear bearing 43 and adorn in casing 1 roof, the installation is simple, rotation that self can be good.

And in the third scheme, the bottom wall of the machine shell 1 is provided with a lower conical gear bearing 53, the lower end of the upper conical gear 4 is coaxially provided with a lower connecting sleeve, and the lower connecting sleeve extends into the inner ring of the lower conical gear bearing 53 and is fixedly connected with each other.

In this scheme, lower conical gear 5 rotates through lower conical gear bearing 53 and adorns in casing 1 diapire, and the installation is simple, rotation that self can be good.

And the housing 1 comprises a vertically arranged cylindrical shell 11, and an upper cover 12 and a lower cover 13 which are respectively assembled at the upper end and the lower end of the shell 11, wherein the upper cover 12 and the lower cover 13 are respectively provided with the output shaft mounting holes.

In the scheme, the shell 1 is designed in a split mode, so that the assembly of internal parts is easy to realize during production, and the difficulty of the production process is reduced.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A bevel gear staggered tooth speed reducer is characterized by comprising:

the top and the bottom of the machine shell (1) are respectively and coaxially provided with an output shaft mounting hole;

the planet carrier output shaft (2) is vertically arranged, the upper end and the lower end of the planet carrier output shaft (2) are coaxially and rotatably connected with the output shaft mounting holes on the upper side and the lower side respectively, and at least three connecting shafts extending along the radial direction of the planet carrier output shaft (2) are arranged on the periphery of the planet carrier output shaft (2) at equal intervals along the circumferential direction of the planet carrier output shaft;

the output conical planetary gears (3) are arranged, at least three output conical planetary gears (3) are arranged, and the output conical planetary gears are coaxially and rotatably arranged on the connecting shaft in a one-to-one correspondence manner;

the upper conical gear (4) is coaxially sleeved outside the planet carrier output shaft (2) and is rotatably assembled in the shell (1) at a position corresponding to the upper part of the output conical planetary gear (3), and the inner edge of the lower end of the upper conical gear (4) is provided with an upper inner conical tooth meshed with the output conical planetary gear (3);

the lower conical gear (5) is coaxially sleeved outside the planet carrier output shaft (2) and is rotatably assembled at a position, corresponding to the lower part of the output conical planetary gear (3), in the machine shell (1), the inner edge of the upper end of the lower conical gear (5) is provided with a lower inner conical tooth meshed with the output conical planetary gear (3), and the number of teeth of the upper inner conical tooth is consistent with that of the lower inner conical tooth;

the driving mechanism (6) is installed on the machine shell (1), the driving end of the driving mechanism (6) extends into the machine shell (1) and is in transmission connection with the upper conical gear (4) and the lower conical gear (5) respectively, and the driving mechanism (6) is used for driving the upper conical gear (4) and the lower conical gear (5) to synchronously and reversely rotate.

2. The bevel gear staggered tooth speed reducer according to claim 1, characterized in that: actuating mechanism (6) include first input shaft (61), one-level conical gear (62) and second grade conical gear (63), one side of casing (1) transversely opens there is the input shaft mounting hole, first input shaft (61) transversely sets up, and its one end passes the input shaft mounting hole to the rotation connection each other, one-level conical gear (62) and second grade conical gear (63) coaxial interval respectively are fixed in the one end tip of first input shaft (61), go up the lower extreme outer fringe of conical gear (4) be equipped with one-level conical gear (62) engaged with go up outer awl tooth (41), the upper end outer fringe of lower conical gear (5) be equipped with second grade conical gear (63) engaged with lower outer awl tooth (51), go up outer awl tooth (41) and the number of teeth of outer awl tooth (51) is inconsistent down.

3. The bevel gear staggered tooth speed reducer according to claim 2, characterized in that: a first input shaft bearing (611) rotatably fitted to the first input shaft (61) is fitted in the input shaft mounting hole.

4. The bevel gear staggered tooth speed reducer according to claim 1, characterized in that: actuating mechanism (6) includes second input shaft (64), one-level straight-teeth gear (65) and second grade straight-teeth gear (66), roof or the diapire of casing (1) are close to the edge and open and have the input shaft mounting hole, the vertical setting of second input shaft (64), its one end passes the input shaft mounting hole to the rotation is connected each other, one-level straight-teeth gear (65) and second grade straight-teeth gear (66) coaxial interval respectively are fixed in the one end tip of second input shaft (64), go up the periphery of bevel gear (4) be equipped with the round with one-level straight-teeth gear (65) one-round external tooth (42) that mesh mutually, the annular mounting disc of periphery fixedly connected with of lower bevel gear (5), the outer edge in upper end of mounting disc be fixed with down round internal tooth (52) of coaxial setting of bevel gear (5), internal tooth (52) with second grade straight-teeth gear (66) mesh mutually, the external teeth (42) and the internal teeth (52) have different numbers of teeth.

5. The bevel gear staggered tooth speed reducer of claim 4, wherein: and a second input shaft bearing (641) which is in rotating fit with the second input shaft (64) is assembled in the input shaft mounting hole.

6. The bevel gear staggered tooth speed reducer according to any one of claims 1 to 5, characterized in that: and output shaft bearings (9) which are in running fit with the upper end and the lower end of the planet carrier output shaft (2) are respectively assembled in the output shaft mounting holes.

7. The bevel gear staggered tooth speed reducer according to any one of claims 1 to 5, characterized in that: the top wall of the machine shell (1) is assembled with an upper conical gear bearing (43), the upper end of the upper conical gear (4) is coaxially provided with an upper connecting sleeve, and the upper connecting sleeve extends into the inner ring of the upper conical gear bearing (43) and is fixedly connected with each other.

8. The bevel gear staggered tooth speed reducer according to any one of claims 1 to 5, characterized in that: the bottom wall of the machine shell (1) is provided with a lower conical gear bearing (53), the lower end of the upper conical gear (4) is coaxially provided with a lower connecting sleeve, and the lower connecting sleeve extends into the inner ring of the lower conical gear bearing (53) and is fixedly connected with each other.

9. The bevel gear staggered tooth speed reducer according to any one of claims 1 to 5, characterized in that: the casing (1) comprises a vertically arranged cylindrical casing (11), and an upper cover (12) and a lower cover (13) which are respectively assembled at the upper end and the lower end of the casing (11), wherein the upper cover (12) and the lower cover (13) are respectively provided with an output shaft mounting hole.