CN219263107U

CN219263107U - Planetary reduction gearbox

Info

Publication number: CN219263107U
Application number: CN202320715298.9U
Authority: CN
Inventors: 徐君鹏; 蒋祖光
Original assignee: Zhejiang Wins Machinery Co ltd
Current assignee: Zhejiang Wins Machinery Co ltd
Priority date: 2023-04-04
Filing date: 2023-04-04
Publication date: 2023-06-27
Anticipated expiration: 2033-04-04

Abstract

The utility model provides a planetary reduction gearbox, and belongs to the technical field of machinery. The problem that an input shaft is replaced by an existing reduction gearbox is solved. The planetary reduction gearbox comprises a box body, an input shaft and an output shaft, wherein a planetary reduction mechanism is arranged between the input shaft and the output shaft, a through hole for the upper end of the input shaft to extend is formed in the top of the box body, the planetary reduction mechanism comprises a sun gear, the input shaft comprises an upper shaft positioned outside the box body and a lower shaft positioned inside the box body, the lower end of the lower shaft is fixedly connected with the sun gear, the upper end of the lower shaft and the lower end of the upper shaft are sleeved with the same connecting sleeve, the connecting sleeve is rotatably supported in the through hole, and sealing is formed between the connecting sleeve and the through hole through an annular oil seal; the lower shaft is fixedly connected with the connecting sleeve, the upper shaft is in threaded connection with the connecting sleeve, a limiting structure for limiting the upper shaft to move downwards is arranged in the connecting sleeve, an annular groove for installing the elastic retainer ring is formed in the inner wall of the connecting sleeve, which is positioned at the upper port, and an annular shaft shoulder for supporting and pressing the elastic retainer ring is formed in the outer wall of the upper shaft. The planetary reduction gearbox is convenient for replacing an input shaft.

Description

Planetary reduction gearbox

Technical Field

The utility model belongs to the technical field of machinery, and relates to a reduction gearbox, in particular to a planetary reduction gearbox.

Background

The planetary reduction gearbox is a power transmission mechanism which reduces the number of revolutions of a motor to a desired number of revolutions by a speed converter of a gear and obtains a large torque.

The prior planetary reduction gearbox is a double-zone interlayer box body water-cooling planetary reduction gearbox (application number: 201510647941.9) disclosed by China patent library, and comprises a machine base, an inner cylinder and a transmission part in the inner cylinder, wherein the transmission part comprises a sun wheel, a planet shaft, a planet carrier and an inner gear ring which are arranged at the extending end of an input shaft, the input shaft is supported by a first bearing at the inner hole of the input end cover, the sun wheel is meshed with the planet wheel, the planet wheel is meshed with the inner gear ring, the inner cylinder is a double-zone thin-walled cylinder and comprises a meshing zone and a non-meshing zone, the meshing zone is arranged in the input end of the machine base, the flange ring of the meshing zone is connected with the flange ring in the machine base, the outer diameter of the meshing zone is smaller than the outer diameter of a non-meshing zone, the outer diameter of the non-meshing zone is equal to twice the center height of the reduction gearbox, the non-meshing zone is arranged outside the machine base, the circular wall of the non-meshing zone is connected with the flange ring outside the machine base, the inner surface of the machine base and the outer surface of the meshing zone are surrounded to form a closed interlayer, the top is provided with a water inlet, and the bottom or side of the machine base is provided with a water outlet.

In the above-mentioned reduction gearbox, the input shaft is of an integral structure, and is directly rotatably supported on the machine base and connected with the sun gear. Because the input shaft structures of the adaptation of different driving sources are different, the reduction gearbox needs to be integrally installed on the input shaft every time, and the operation is inconvenient.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides a planetary reduction gearbox which is convenient for replacing an input shaft.

The aim of the utility model can be achieved by the following technical scheme: the planetary reduction gearbox comprises a box body, an input shaft and an output shaft, wherein the input shaft and the output shaft are coaxially arranged in the box body, a planetary reduction mechanism used for connecting the lower end of the input shaft and the output shaft is arranged between the lower end of the input shaft and the output shaft, a through hole for extending out of the upper end of the input shaft is formed in the top of the box body, the planetary reduction mechanism comprises a sun gear, and the planetary reduction gearbox is characterized in that the input shaft comprises an upper shaft positioned outside the box body and a lower shaft positioned inside the box body, and the upper shaft and the lower shaft are coaxially arranged; the lower end of the lower shaft is fixedly connected with the sun gear, the upper end of the lower shaft and the lower end of the upper shaft are sleeved with the same connecting sleeve, the connecting sleeve is rotatably supported in the through hole, and sealing is formed between the connecting sleeve and the through hole through an annular oil seal; the lower shaft is fixedly connected with the connecting sleeve, the upper shaft is in threaded connection with the connecting sleeve, a limiting structure for limiting the upper shaft to move downwards is arranged in the connecting sleeve, an annular groove for installing the elastic retainer ring is formed in the inner wall of the connecting sleeve, which is positioned at the upper port, an annular shaft shoulder is integrally formed in the outer wall of the upper shaft, and the bottom wall of the elastic retainer ring is tightly pressed on the annular shaft shoulder.

Under the common cooperation of the thread structure, the elastic retainer ring and the limiting structure, the connecting sleeve and the upper shaft are stably connected to form a whole, and the smooth and stable operation of the whole transmission process is ensured.

In this application, only need dismouting circlip and rotatory upper shaft alright realize the upper shaft dismouting, realize that the upper shaft is changed and is formed different input shafts to the different actuating sources of adaptation, whole dismouting process operating procedure is very few, has advantages such as input shaft replacement convenience, light.

In the planetary reduction gearbox, the upper shaft comprises an external thread matched with the connecting sleeve, the outer wall of the upper shaft is sealed with the connecting sleeve through the sealing ring, and the sealing ring is positioned between the external thread and the elastic retainer ring so as to prevent external dust from entering into a threaded connection position and ensure that the assembly and disassembly processes of the upper shaft are smooth.

In the planetary reduction gearbox, the limiting structure comprises a limiting seat which is formed on the inner side wall of the connecting sleeve and is annular, the limiting seat is coaxial with the connecting sleeve, and the bottom wall of the upper shaft is tightly pressed on the top wall of the limiting seat. The limiting seat is used for limiting the downward movement of the upper shaft and limiting the downward movement distance of the upper shaft, so that the lower shaft is installed in place at one time, and the input shaft is further convenient to replace.

In the planetary reduction gearbox, the inner wall of the limiting seat is provided with a conical surface with the diameter gradually becoming smaller from top to bottom, the bottom wall of the upper shaft is provided with a conical block matched with the conical surface, and the side face of the conical block is attached to the conical surface. The conical surface is matched with the conical block and used for forcedly correcting the position of the upper shaft and enhancing the coaxiality of the connection of the upper shaft and the connecting sleeve.

In the planetary reduction gearbox, the upper end of the lower shaft is pressed on the limiting seat, so that the lower shaft is installed in place at one time, and the assembly is facilitated.

As another scheme, in the planetary reduction gearbox, the limiting structure comprises the annular shaft shoulder, and an annular step surface for pressing the bottom wall of the annular shaft shoulder is formed on the inner wall of the connecting sleeve.

In the planetary reduction gearbox, an annular positioning groove is coaxially formed in the outer side wall of the annular shaft shoulder, the sealing ring is positioned in the positioning groove, and the outer side wall of the sealing ring is pressed on the inner side wall of the connecting sleeve.

In the planetary reduction gearbox, the connecting sleeve is rotatably supported in the through hole through the bearing, and the bearing is positioned on the lower side of the annular oil seal. By adopting the design, the rotation stability of the connecting sleeve is ensured.

In the planetary reduction gearbox, a positioning sleeve is vertically arranged in the through hole, the positioning sleeve is sleeved outside the connecting sleeve, and the positioning sleeve is fixedly connected with the gearbox body in a sealing way; the annular oil seal is positioned in the positioning sleeve, and the inner side and the outer side of the annular oil seal are respectively pressed on the connecting sleeve and the inner wall of the positioning sleeve. By adopting the design, the assembly is facilitated.

In the planetary reduction gearbox, an annular sealing part is formed on the inner wall of the upper end of the positioning sleeve, the sealing part is sleeved outside the connecting sleeve, and the annular oil seal top wall is pressed on the sealing part. The sealing part forms shielding on the upper side of the annular oil seal, so that the interference of the outside to the annular oil seal is reduced.

In the planetary reduction gearbox, the bearing comprises an outer ring fixedly connected with the gearbox body and an inner ring fixedly connected with the connecting sleeve, the connecting sleeve is sleeved with and fixedly provided with the baffle ring, and the upper end of the inner ring and the lower end of the outer ring are respectively pressed on the positioning sleeve and the baffle ring. The locating sleeve is used for supporting and locating the annular oil seal and is also used for an axial limiting bearing, namely, in the application, the locating sleeve has a dual-purpose effect of one object, so that the structure is simplified, and the assembly is further convenient.

Compared with the prior art, the planetary reduction gearbox has the following advantages:

1. in this application, only need dismouting circlip and rotatory upper shaft alright realize the upper shaft dismouting, realize that the upper shaft is changed and is formed different input shafts to the different actuating sources of adaptation, whole dismouting process operating procedure is very few, has advantages such as input shaft replacement convenience, light.

2. The conical surface is matched with the conical block and used for forcedly correcting the position of the upper shaft and enhancing the coaxiality of the connection of the upper shaft and the connecting sleeve.

3. The locating sleeve is used for supporting and locating the annular oil seal and is also used for an axial limiting bearing, namely, in the application, the locating sleeve has a dual-purpose effect of one object, so that the structure is simplified, and the assembly is further convenient.

Drawings

Fig. 1 is a schematic diagram of the structure of the planetary reduction gearbox.

Fig. 2 is an enlarged schematic view of the structure at a in fig. 1.

In the figure, 1, a box body; 1a, through holes; 2. an output shaft; 3. a planetary reduction mechanism; 3a, sun gear; 4. applying; 4a, an annular shaft shoulder; 4b, cone blocks; 5. a lower shaft; 6. connecting sleeves; 6a, a limiting seat; 7. an annular oil seal; 8. a circlip; 9. a seal ring; 10. a bearing; 11. a positioning sleeve; 11a, a sealing part; 12. a baffle ring.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

Example 1

As shown in fig. 1, the planetary reduction gearbox comprises a box body 1 and an input shaft and an output shaft 2 which are vertically and rotatably arranged in the box body 1, and the input shaft and the output shaft 2 are coaxially arranged.

Wherein,,

the top and the bottom of box 1 vertically run through respectively have through-hole 1a and give way the hole, and the input shaft upper end stretches out box 1 through-hole 1a, and output shaft 2 lower extreme stretches out box 1 through the hole of giving way. A planetary reduction mechanism 3 for connecting the lower end of the input shaft and the output shaft 2 is arranged between the lower end of the input shaft and the output shaft, the planetary reduction mechanism 3 is an existing product, and comprises a sun gear 3a, a planet gear, a gear ring and a planet carrier, and the specific connection mode and the installation mode of the planetary reduction mechanism are existing and are not described in detail herein. In the actual product, the planetary reduction mechanisms 3 are provided with two groups and are axially and serially arranged along the input shaft, and the planet carrier of the last planetary reduction mechanism 3 is fixedly connected with the upper end of the output shaft 2.

As shown in fig. 1 and 2, the input shaft includes an upper shaft 4 outside the case 1 and a lower shaft 5 inside the case 1, and the upper shaft 4 and the lower shaft 5 are coaxially disposed. The lower end of the lower shaft 5 is fixedly connected with the sun gear 3a, and the same connecting sleeve 6 is sleeved on the upper end of the lower shaft 5 and the lower end of the upper shaft 4. The connecting sleeve 6 is vertically rotatably supported in the through hole 1a and forms a seal therebetween by an annular oil seal 7. The lower shaft 5 is fixedly connected with the connecting sleeve 6; the upper shaft 4 is in threaded connection with the connecting sleeve 6, a limiting structure for limiting the upper shaft 4 to move downwards is arranged in the connecting sleeve 6, an annular groove for installing the elastic retainer ring 8 is formed in the inner wall of the connecting sleeve 6 at the upper port, and one side of the elastic retainer ring 8 is opened; an annular shaft shoulder 4a is integrally formed on the outer wall of the upper shaft 4, and the bottom wall of the elastic retainer ring 8 is tightly pressed on the annular shaft shoulder 4 a.

Under the cooperation of the thread structure, the elastic retainer ring 8 and the limiting structure, the connecting sleeve 6 and the upper shaft 4 are stably connected to form a whole, and the smooth and stable operation of the whole transmission process is ensured. In this application, only need dismouting circlip 8 and rotatory upper shaft 4 alright realize upper shaft 4 dismouting, realize that upper shaft 4 changes and form different input shafts to the different actuating sources of adaptation, whole dismouting process operating procedure is very few, has advantages such as input shaft replacement convenience, light.

Further, the upper shaft 4 comprises an external thread matched with the connecting sleeve 6, the outer wall of the upper shaft 4 forms a seal with the connecting sleeve 6 through a sealing ring 9, and the sealing ring 9 is positioned between the external thread and the elastic retainer ring 8 so as to prevent external dust from entering into a threaded connection position and ensure that the dismounting process of the upper shaft 4 is smoothly carried out.

In the present embodiment of the present utility model, in the present embodiment,

the seal ring 9 is installed as follows: the outer side wall of the annular shaft shoulder 4a is coaxially provided with an annular positioning groove which is coaxial with the upper shaft 4. The sealing ring 9 is positioned in the positioning groove, and the outer side wall of the sealing ring 9 is pressed on the inner side wall of the connecting sleeve 6.

The limiting structure comprises a limiting seat 6a which is formed on the inner side wall of the connecting sleeve 6 and is annular, the limiting seat 6a is coaxial with the connecting sleeve 6, and the bottom wall of the upper shaft 4 is tightly pressed on the top wall of the limiting seat 6 a. The limiting seat 6a is used for limiting the downward movement of the upper shaft 4 and limiting the downward movement distance of the upper shaft 4, so that the lower shaft 5 is installed in place at one time, and the input shaft replacement is further facilitated. Further, the inner wall of the limit seat 6a is formed with a conical surface with the diameter gradually decreasing from top to bottom, the bottom wall of the upper shaft 4 is integrally formed with a conical block 4b matched with the conical surface, and the side surface of the conical block 4b is attached to the conical surface. The conical surface is matched with the conical block 4b and is used for forcedly correcting the position of the upper shaft 4 and enhancing the coaxiality of the connection of the upper shaft 4 and the connecting sleeve 6.

The lower shaft 5 is in threaded connection with the connecting sleeve 6, and the upper end of the lower shaft 5 is pressed on the limiting seat 6a, so that the lower shaft 5 is installed in place at one time, and the assembly is facilitated.

The annular oil seal 7 is installed as follows: the connecting sleeve 6 is rotatably supported in the through hole 1a by a bearing 10, and the bearing 10 is located at the lower side of the annular oil seal 7. A positioning sleeve 11 is vertically arranged in the through hole 1a, the positioning sleeve 11 is sleeved outside the connecting sleeve 6, and the positioning sleeve 11 is in sealing and fixing connection with the box body 1; the annular oil seal 7 is positioned in the positioning sleeve 11, and the inner side and the outer side of the annular oil seal 7 are respectively pressed on the inner walls of the connecting sleeve 6 and the positioning sleeve 11. Further, an annular sealing part 11a is formed on the inner wall of the upper end of the positioning sleeve 11, the sealing part 11a is sleeved outside the connecting sleeve 6, and the top wall of the annular oil seal 7 is pressed on the sealing part 11 a. The seal portion 11a forms a shield on the upper side of the annular oil seal 7, reducing interference of the outside to the annular oil seal 7.

As shown in fig. 2, the bearing 10 is a ball bearing 10, and the bearing 10 comprises an outer ring fixedly connected with the box body 1 and an inner ring fixedly connected with the connecting sleeve 6, wherein a baffle ring 12 is sleeved and fixed on the connecting sleeve 6, and the upper end and the lower end of the inner ring are respectively pressed on the positioning sleeve 11 and the baffle ring 12. The locating sleeve 11 is used for supporting and locating the annular oil seal 7 and is also used for axially limiting the bearing 10, namely, in the application, the locating sleeve 11 has a dual-purpose effect, so that the structure is simplified, and the assembly is further convenient.

Example two

The structure and principle of the second embodiment are basically the same as those of the first embodiment, except that: the limiting structure comprises the annular shaft shoulder 4a, and an annular step surface for propping the bottom wall of the annular shaft shoulder 4a is formed on the inner wall of the connecting sleeve 6.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims

1. The utility model provides a planetary reduction gearbox, including box (1) and coaxial input shaft and output shaft (2) that set up in box (1), be equipped with between input shaft lower extreme and the output shaft (2) and be used for connecting planetary reduction gears (3) of both, box (1) top is equipped with and supplies through-hole (1 a) that the input shaft upper end stretches out, planetary reduction gears (3) include sun gear (3 a), characterized in that, the input shaft includes upper shaft (4) and lower shaft (5) in box (1) inside in box (1) outside, and upper shaft (4) and lower shaft (5) coaxial setting; the lower end of the lower shaft (5) is fixedly connected with the sun gear (3 a), the upper end of the lower shaft (5) and the lower end of the upper shaft (4) are sleeved with the same connecting sleeve (6), the connecting sleeve (6) is rotatably supported in the through hole (1 a), and sealing is formed between the two through an annular oil seal (7); the lower shaft (5) is fixedly connected with the connecting sleeve (6), the upper shaft (4) is in threaded connection with the connecting sleeve (6), a limiting structure for limiting the lower movement of the upper shaft (4) is arranged in the connecting sleeve (6), an annular groove for installing the elastic retainer ring (8) is formed in the inner wall of the connecting sleeve (6) at the upper port, an annular shaft shoulder (4 a) is integrally formed in the outer wall of the upper shaft (4), and the bottom wall of the elastic retainer ring (8) is tightly pressed on the annular shaft shoulder (4 a).

2. A planetary reduction gearbox according to claim 1, characterised in that the upper shaft (4) comprises an external thread co-operating with the connection sleeve (6), the outer wall of the upper shaft (4) forms a seal with the connection sleeve (6) by means of a sealing ring (9), and the sealing ring (9) is located between the external thread and the circlip (8).

3. The planetary reduction gearbox according to claim 1, wherein the limiting structure comprises a limiting seat (6 a) which is formed on the inner side wall of the connecting sleeve (6) and is annular, the limiting seat (6 a) is coaxial with the connecting sleeve (6), and the bottom wall of the upper shaft (4) is tightly pressed on the top wall of the limiting seat (6 a).

4. A planetary reduction gearbox according to claim 3, wherein the inner wall of the limit seat (6 a) is formed with a conical surface with the diameter gradually decreasing from top to bottom, the bottom wall of the upper shaft (4) is formed with a conical block (4 b) matched with the conical surface, and the side surface of the conical block (4 b) is attached to the conical surface.

5. A planetary gearbox according to claim 3 or 4, characterised in that the upper end of the lower shaft (5) is pressed against the limit seat (6 a).

6. The planetary reduction gearbox according to claim 2, wherein the annular positioning groove is coaxially formed in the outer side wall of the annular shaft shoulder (4 a), the sealing ring (9) is positioned in the positioning groove, and the outer side wall of the sealing ring (9) is pressed on the inner side wall of the connecting sleeve (6).

7. Planetary gearbox according to claim 1, characterized in that the connection sleeve (6) is rotatably supported in the through hole (1 a) by means of a bearing (10), and that the bearing (10) is located on the underside of the annular oil seal (7).

8. The planetary reduction gearbox according to claim 7, wherein a positioning sleeve (11) is vertically arranged in the through hole (1 a), the positioning sleeve (11) is sleeved outside the connecting sleeve (6), and the positioning sleeve (11) is fixedly connected with the box body (1) in a sealing way; the annular oil seal (7) is positioned in the positioning sleeve (11), and the inner side and the outer side of the annular oil seal (7) are respectively pressed on the connecting sleeve (6) and the inner wall of the positioning sleeve (11).

9. The planetary reduction gearbox according to claim 8, wherein an annular sealing part (11 a) is formed on the inner wall of the upper end of the positioning sleeve (11), the sealing part (11 a) is sleeved outside the connecting sleeve (6), and the top wall of the annular oil seal (7) is pressed on the sealing part (11 a).

10. The planetary reduction gearbox according to claim 8 or 9, wherein the bearing (10) comprises an outer ring fixedly connected with the gearbox body (1) and an inner ring fixedly connected with the connecting sleeve (6), the connecting sleeve (6) is sleeved and fixed with a baffle ring (12), and the upper end and the lower end of the inner ring are respectively pressed on the positioning sleeve (11) and the baffle ring (12).