CN210106528U

CN210106528U - Precision planetary gear reducer suitable for tensioning installation

Info

Publication number: CN210106528U
Application number: CN201920890768.9U
Authority: CN
Inventors: 江建斌; 江建敏; 姚文龙; 关放柳
Original assignee: ZHEJIANG SANKAI MECHANICAL AND ELECTRICAL CO Ltd
Current assignee: ZHEJIANG SANKAI MECHANICAL AND ELECTRICAL CO Ltd
Priority date: 2019-06-13
Filing date: 2019-06-13
Publication date: 2020-02-21
Anticipated expiration: 2029-06-13

Abstract

The utility model provides an accurate planetary gear speed reducer suitable for tight installation rises belongs to mechanical technical field. The utility model discloses a speed reducer body and locate the reducing gear box of speed reducer body one side, the reducing gear box includes the box and all locates the pinion in the box and with the gear wheel of pinion meshing, the speed reducer includes the casing that links firmly with the box and the output shaft that rotates to be connected with the casing, have the opening that supplies output shaft one end to stretch into on the box, and the output shaft links firmly with the pinion, the both ends of pinion all rotate to be connected with the box through the bearing, insert in the pinion and establish and be fixed with the connecting cylinder that possesses elasticity, and the outer end of connecting cylinder stretches out to the outside of the box; the outer side wall of the inner end of the connecting cylinder is a first conical surface, a second conical surface matched with the first conical surface is arranged on the inner side wall of the large gear, the first conical surface is tightly attached to the second conical surface, and a notch which penetrates through the connecting cylinder along the axial direction of the connecting cylinder is further formed in the side wall of the connecting cylinder. The utility model discloses transmission precision is high.

Description

Precision planetary gear reducer suitable for tensioning installation

Technical Field

The utility model belongs to the technical field of machinery, a precision planetary gear speed reducer is related to, especially a precision planetary gear speed reducer suitable for tight installation rises.

Background

The precision planetary gear reducer is a relatively precise transmission product, is an independent transmission component for reducing the rotating speed, transmitting power and increasing torque, and is widely applied to modern machinery.

The existing precision planetary gear reducer has part of application working conditions that the output shaft of the precision planetary gear reducer is required to be combined with another gear reducer so as to increase the reduction ratio and meet the installation requirements, but when the existing hole output type gear reducer is matched with a shaft of a user, the hole output type gear reducer is basically connected through a flat key, and because the flat key is matched with a gap, the flat key is impacted ceaselessly when frequently used in forward and reverse rotation, and finally, the transmission error is large, so that the use of the user is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at having above-mentioned problem to current technique, provided an accurate planetary gear reducer suitable for tight installation rises, the technical problem of solution is how to improve transmission stability.

The purpose of the utility model can be realized by the following technical proposal: the precision planetary gear reducer is suitable for tension installation and comprises a reducer body and a reducer box arranged on one side of the reducer body, wherein the reducer box comprises a box body, a pinion and a gearwheel, the pinion and the gearwheel are both arranged in the box body, the gearwheel is meshed with the pinion, the reducer box comprises a shell fixedly connected with the box body and an output shaft rotatably connected with the shell, an opening for one end of the output shaft to extend into is arranged on the box body, and the output shaft is fixedly connected with the pinion; the outer side wall of the inner end of the connecting cylinder is a first conical surface, a second conical surface matched with the first conical surface is arranged on the inner side wall of the large gear, the first conical surface and the second conical surface are tightly attached, and a notch which penetrates through the connecting cylinder in the axial direction is further formed in the side wall of the connecting cylinder.

During installation, the user equipment input shaft is inserted in the connecting cylinder, when the connecting cylinder moves towards the large gear, the connecting cylinder is enabled to contract inwards under the extrusion of the second conical surface to hold the user equipment input shaft tightly, the inner wall of the connecting cylinder and the side wall of the user equipment input shaft are enabled to be tightly attached to a gapless mode, the precision and the stability of the whole transmission are effectively improved, and the speed reducer is suitable for working in a long-term frequent positive and negative rotation or a severe environment of starting and stopping.

In foretell precision planetary gear reducer who is applicable to tight installation that rises, the outer end outer wall of connecting cylinder on integrated into one piece have an annular turn-ups, and foretell breach extends to annular turn-ups, annular turn-ups runs through along the axial of connecting cylinder and is equipped with the screw hole, the screw hole has a plurality ofly and along the circumference equipartition of connecting cylinder, is equipped with the screw hole on the gear wheel, screw hole and screw hole quantity the same and the position is just right one by one, gear wheel and connecting cylinder link firmly in the screw hole mutually through passing the screw hole and revolving. By adopting the design, the input shaft of the user equipment can be conveniently disassembled and assembled.

In the precision planetary gear reducer suitable for tension installation, the shell comprises an annular adjusting part, the adjusting part is sleeved outside the output shaft, the inner wall of the box body at the opening is an annular step, the adjusting part and the output shaft are arranged coaxially, the adjusting part is positioned in the annular step, and the adjusting part forms sealing with the bottom wall of the annular step through a sealing ring. During the in-service use, the connection between casing and the box relies on above-mentioned sealing washer to realize sealed, has simple structure, simple to operate's advantage.

In the combined type precise planetary gear reducer, the bottom wall of the annular step is provided with an annular groove, the sealing ring is positioned in the annular groove, and two end faces of the sealing ring respectively abut against the bottom wall of the annular groove and the end face of the adjusting part.

In the combined type precise planetary gear reducer, the end face of the output shaft, which is positioned in the box body, is provided with a bolt hole, the side wall of the output shaft is also integrally formed with an annular convex shoulder, the annular convex shoulder is positioned between the adjusting part and the bolt hole, a first bolt is screwed in the bolt hole, and the pinion is clamped between the head of the first bolt and the annular convex shoulder. By adopting the design, the connection stability and strength of the output shaft and the pinion are effectively enhanced, and the transmission precision is further improved.

Compared with the prior art, when the combined type precise planetary gear speed reducer is installed, the user equipment input shaft is inserted into the connecting cylinder, when the connecting cylinder moves towards the large gear, the connecting cylinder is inwards contracted under the extrusion of the second conical surface to hold the user equipment input shaft tightly, the inner wall of the connecting cylinder and the side wall of the user equipment input shaft are tightly attached to be generated without gaps, the precision and the stability of the whole transmission are effectively improved, and the speed reducer is suitable for working in a long-term severe environment with frequent forward and reverse rotation or starting and stopping.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic sectional structure diagram of the present invention.

Fig. 3 is an enlarged schematic view of a structure at a in fig. 2.

In the figure, 1, a box body; 1a, an annular step; 2. a pinion gear; 3. a connecting cylinder; 3a, a first conical surface; 3b, a gap; 3c, annular flanging; 4. a bull gear; 4a, a second conical surface; 5. a bearing; 6. a screw; 7. a housing; 7a, an adjusting part; 8. an output shaft; 8a, an annular shoulder; 9. a first bolt; 10. and (5) sealing rings.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

The precision planetary gear reducer suitable for tension installation comprises a reducer body and a reduction gearbox arranged on one side of the reducer body.

As shown in fig. 1 and 2, the reduction gearbox includes a box body 1, a pinion 2 and a bull gear 4, wherein the pinion 2 and the bull gear are both arranged in the box body 1, and the bull gear is meshed with the pinion 2. The speed reducer comprises a shell 7 fixedly connected with the box body 1 and an output shaft 8 rotatably connected with the shell 7, an opening for one end of the output shaft 8 to extend into is formed in the box body 1, and the output shaft 8 is fixedly connected with the pinion 2. In the embodiment, the box body 1 and the shell 7 are detachably and fixedly connected through a plurality of second bolts; the output shaft 8 and the pinion 2 are connected as follows: the pinion 2 is mounted on the output shaft 8 in a thermal expansion and contraction mode, namely, during machining, the pinion 2 is heated to 90-110 degrees to enable the inner hole to thermally expand and enlarge, and then the pinion 2 can tightly hold the output shaft 8 when cooled and contracted. Further, the end face of the output shaft 8, which is located in the box body 1, is provided with a bolt hole, the side wall of the output shaft 8 is also integrally formed with an annular shoulder 8a, the annular shoulder 8a is located between the adjusting portion 7a and the bolt hole, a bolt one 9 is screwed in the bolt hole, and the pinion 2 is clamped between the head of the bolt one 9 and the annular shoulder 8a, so that the connection stability and strength of the output shaft 8 and the pinion 2 are effectively enhanced.

Specifically, as shown in fig. 2, both ends of the pinion 2 are rotatably connected to the casing 1 through bearings 5, and preferably, both inner rings and outer rings of the bearings 5 are fixedly connected to the pinion 2 and the casing 1 through interference fit, respectively. A connecting cylinder 3 with elasticity is inserted and fixed in the pinion 2, and the outer end of the connecting cylinder 3 extends out of the box body 1. The connector barrel 3 may be made of spring steel, plastic or cr 40. The outer side wall of the inner end of the connecting cylinder 3 is a first conical surface 3a, a second conical surface 4a matched with the first conical surface 3a is arranged on the inner side wall of the large gear 4, the first conical surface 3a and the second conical surface 4a are tightly attached, and a notch 3b which penetrates through the connecting cylinder 3 along the axial direction of the connecting cylinder 3 is further formed in the side wall of the connecting cylinder 3, so that the connecting cylinder 3 is more easily contracted.

Further, an annular flange 3c is integrally formed on the outer wall of the outer end of the connecting cylinder 3, the annular flange 3c and the connecting cylinder 3 are coaxially arranged, and the notch 3b extends to the annular flange 3 c. Annular turn-ups 3c runs through along connecting cylinder 3's axial and is equipped with 6 holes of screw, and 6 holes of screw have a plurality ofly and along connecting cylinder 3's circumference equipartition, are equipped with the screw hole on gear wheel 4, and the same and position of screw hole and 6 holes of screw are just right one by one, and gear wheel 4 and connecting cylinder 3 link firmly mutually through passing 6 holes of screw and revolving in the screw 6 of screw hole to make things convenient for the dismouting of user equipment input shaft.

As shown in fig. 2 and 3, the housing 7 includes an annular adjustment portion 7a, and the adjustment portion 7a is located in the case 1 and is sleeved outside the output shaft 8. The inner wall of the box body 1 at the opening is an annular step 1a, and the annular step 1a, the adjusting part 7a and the output shaft 8 are coaxially arranged. The regulating portion 7a is located inside the annular step 1a, and the regulating portion 7a forms a seal with the bottom wall of the annular step 1a through the seal ring 10. The installation mode of the seal ring 10 is as follows: an annular groove is formed in the bottom wall of the annular step 1a, the sealing ring 10 is located in the annular groove, and two end faces of the sealing ring 10 are respectively abutted to the bottom wall of the annular groove and the end face of the adjusting portion 7 a.

During installation, the user equipment input shaft is inserted in the connecting cylinder 3, when the connecting cylinder 3 moves towards the large gear 4, the connecting cylinder 3 contracts inwards to hold the user equipment input shaft tightly under the extrusion of the conical surface two 4a, so that the inner wall of the connecting cylinder 3 and the side wall of the user equipment input shaft are tightly attached to be generated without gaps, the precision and the stability of the whole transmission are effectively improved, and the speed reducer is suitable for working in a long-term frequent positive and negative rotation or a severe environment of starting and stopping.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The precision planetary gear reducer suitable for tension installation comprises a reducer body and a reduction gearbox arranged on one side of the reducer body, wherein the reduction gearbox comprises a box body (1), a pinion (2) and a gearwheel (4), the pinion (2) and the gearwheel (4) are both arranged in the box body (1) and are meshed with each other, the reducer comprises a shell (7) fixedly connected with the box body (1) and an output shaft (8) rotatably connected with the shell (7), an opening for one end of the output shaft (8) to extend into is formed in the box body (1), the output shaft (8) is fixedly connected with the pinion (2), and the precision planetary gear reducer is characterized in that two ends of the pinion (2) are rotatably connected with the box body (1) through bearings (5), an elastic connecting cylinder (3) is inserted into and fixed in the pinion (2), and the outer end of the connecting cylinder (3) extends out of the box body (1); the inner end outer side wall of the connecting cylinder (3) is a first conical surface (3a), a second conical surface (4a) matched with the first conical surface (3a) is arranged on the inner side wall of the large gear (4), the first conical surface (3a) and the second conical surface (4a) are tightly attached, and a notch (3b) which is arranged along the axial direction of the connecting cylinder (3) in a penetrating mode is further formed in the side wall of the connecting cylinder (3).

2. The precision planetary gear reducer applicable to tensioning installation according to claim 1, wherein an annular flange (3c) is integrally formed on the outer end outer wall of the connecting cylinder (3), the notch (3b) extends to the annular flange (3c), a plurality of screw holes are formed in the annular flange (3c) in a penetrating mode along the axial direction of the connecting cylinder (3), the screw holes are uniformly distributed along the circumferential direction of the connecting cylinder (3), threaded holes are formed in the gear wheel (4), the threaded holes are the same in number and are aligned to the positions one by one, and the gear wheel (4) and the connecting cylinder (3) are fixedly connected through screws (6) penetrating through the screw holes and screwed in the threaded holes.

3. The precision planetary gear reducer suitable for tension installation according to claim 1 or 2, wherein the housing (7) includes an annular adjusting portion (7a), the adjusting portion (7a) is sleeved outside the output shaft (8), the inner wall of the box body (1) at the opening is an annular step (1a), the adjusting portion (7a) and the output shaft (8) are coaxially arranged, the adjusting portion (7a) is located in the annular step (1a), and the adjusting portion (7a) forms a seal with the bottom wall of the annular step (1a) through the seal ring (10).

4. The precision planetary gear reducer suitable for tension installation as claimed in claim 3, wherein the bottom wall of the annular step (1a) is provided with an annular groove, the sealing ring (10) is located in the annular groove, and two end faces of the sealing ring (10) respectively abut against the bottom wall of the annular groove and an end face of the adjusting portion (7 a).

5. The precision planetary gear reducer suitable for tension installation according to claim 1, wherein the end face of the output shaft (8) in the box body (1) is provided with a bolt hole, the side wall of the output shaft (8) is also integrally formed with an annular shoulder (8a), the annular shoulder (8a) is located between the adjusting portion (7a) and the bolt hole, a first bolt (9) is screwed in the bolt hole, and the pinion (2) is clamped between the head of the first bolt (9) and the annular shoulder (8 a).