CN209875901U - Transmission gear transmission mechanism - Google Patents

Abstract

The utility model provides a derailleur gear drive belongs to transmission machinery technical field. The transmission solves the problem that parts in the existing transmission with large jitter amplitude are easily abraded. This derailleur gear drive mechanism, which comprises a housin, the holding ring, the support ring, bearing assembly, transmission shaft and output gear, a plurality of location screws have been seted up to circumference on casing and the holding ring, the support ring sets up and sets up the conical setpoint corresponding with location screw position on its terminal surface each other side by side with the holding ring, the tip of nut and the structure of setpoint are mutually supported, the dog is passed through at the rear of support ring and is supported, the transmission shaft passes through parallel key and output gear cooperation, the tip and the casing of transmission shaft, clearance fit between the holding ring and stretch out outside the casing, a plurality of bearing assembly set up in the neck of transmission shaft, the outside and the support ring of. The utility model discloses a fixed knot to the transmission shaft constructs to improve and makes it have the better advantage of stability.

Description

Transmission gear transmission mechanism

Technical Field

The utility model belongs to the technical field of the drive machine, a derailleur is related to, in particular to derailleur gear drive.

Background

The speed changer is a device for changing the running speed or traction force of machines such as machine tools, and is generally composed of a plurality of gears with different diameters and installed between a driving shaft and a driven shaft, the power output of different gears is realized by the engagement of a plurality of gears with different gear ratios and an output shaft, the stability of the structure of the speed changer directly influences the stability of the power output, but the bearing used for supporting the transmission shaft in the conventional speed changer is generally and directly installed on a shell, so the central axes of the transmission shaft and the bearing are not easy to be aligned when being assembled, the shaking amplitude of the speed changer is large under the condition of high rotating speed, the noise is also large, and parts in the speed changer are easy to be worn.

Disclosure of Invention

The utility model aims at providing a stability is better and transmission gear who easily assembles to the above-mentioned problem that exists among the prior art.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a derailleur gear drive mechanism, includes casing, holding ring, support ring, bearing assembly, transmission shaft and output gear, its characterized in that, casing and holding ring on circumference seted up a plurality of location screws, the holding ring is fixed in the casing through the nut, the support ring set up and set up the conical setpoint corresponding with location screw position on its terminal surface each other side by side with the holding ring, the tip of nut and the structure of setpoint are mutually supported, the rear of support ring is passed through the dog and is supported, the transmission shaft pass through parallel key and output gear cooperation, clearance fit and stretch out outside the casing between the tip of transmission shaft and casing, holding ring, a plurality of settings are in the neck of transmission shaft, the outside and support ring, the dog of bearing assembly offset and lean on.

The technical effects of the transmission gear transmission mechanism are as follows: the power after the variable speed transmits to the output gear and drives the transmission shaft to rotate, wherein the cooperation through location screw and setpoint makes the holding ring, support and alleviate the casing and coincide more easily at the back central axis of assembly to bearing assembly supports through holding ring and dog and can increase the quantity of bearing on the transmission shaft for traditional direct setting on the casing, spare part in the casing can be installed in proper order when the assembly, the equipment is short-term, the axiality between bearing assembly and the transmission shaft is higher, the operation is also more stable.

In the above transmission gear transmission mechanism, the bearing assembly includes an outer ring, an inner ring, a retainer and balls, the retainer is provided with a plurality of ball grooves which are spaced and reversed, two support surfaces in the ball grooves are of arc surface structures, the balls are cylinders and are clamped in the ball grooves, and the inner ring is provided with an annular groove for embedding the balls.

In the above-described transmission gear transmission mechanism, the number of the bearing assemblies is three, and a partition plate is provided between every two adjacent bearing assemblies.

In the above transmission gear transmission mechanism, a limit step is arranged at an end of the transmission shaft.

In the above transmission gear transmission mechanism, the center of the transmission shaft is a hollow structure.

Compared with the prior art, the transmission gear transmission mechanism has the advantage of better stability by improving the fixing structure of the transmission shaft.

Drawings

FIG. 1 is a cross-sectional view of the present transmission gear train.

FIG. 2 is a schematic view of a bearing assembly construction.

In the figure, 1, a housing; 2. a positioning ring; 3. a support ring; 4. a bearing assembly; 4a, an inner ring; 4b, a retainer; 4c, a ball; 4d, ball grooves; 5. a drive shaft; 6. an output gear; 7. positioning the screw hole; 8. positioning points; 9. a stopper; 10. a flat bond; 11. a partition plate; 12. and a limiting step.

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.

As shown in fig. 1, the transmission gear transmission mechanism includes a housing 1, a positioning ring 2, a supporting ring 3, a bearing assembly 4, a transmission shaft 5 and an output gear 6, a plurality of positioning screw holes 7 are circumferentially arranged on the housing 1 and the positioning ring 2, the positioning ring 2 is fixed in the housing 1 through a nut, the supporting ring 3 and the positioning ring 2 are mutually arranged in parallel, and a conical positioning point 8 corresponding to the positioning screw hole 7 is arranged on the end surface of the supporting ring 3, the end of the nut is matched with the positioning point 8, a stop block 9 is arranged at the rear of the supporting ring 3 for supporting, the transmission shaft 5 is matched with the output gear 6 through a flat key 10, the end of the transmission shaft 5 is matched with the housing 1, the positioning ring 2 is in clearance fit and extends out of the housing 1, the plurality of bearing assemblies 4 are arranged.

As shown in fig. 2, the bearing assembly 4 includes an outer ring, an inner ring 4a, a cage 4b and balls 4c, the cage 4b is provided with a plurality of ball grooves 4d in opposite directions, two support surfaces in the ball grooves 4d are of arc surface structures, the balls 4c are cylinders and are clamped in the ball grooves 4d, and the inner ring 4a is provided with an annular groove for the balls 4c to be inserted into. The ball grooves 4d are designed in a mutually spaced reverse mode, so that the whole acceptance is more uniform, and the balls 4c are of cylindrical structures and are embedded in the annular grooves, so that the stress area is larger and the fixity is better.

In more detail, the number of the bearing assemblies 4 is three, and the partition plate 11 is arranged between every two adjacent bearing assemblies 4, so that the supporting length of the bearing assemblies 4 can be lengthened, and the layout is more reasonable.

Further, the tip of transmission shaft 5 is provided with spacing step 12, and the center of transmission shaft 5 is the cavity structure, and spacing step 12 can make its position more accurate when the assembly, and the cavity structure is used for alleviateing the weight increase transmission efficiency of transmission shaft 5.

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.

Although the terms of the housing 1, the positioning ring 2, the support ring 3, the bearing assembly 4, the inner ring 4a, the cage 4b, the balls 4c, the ball grooves 4d, the transmission shaft 5, the output gear 6, the positioning screw holes 7, the positioning points 8, the stoppers 9, the flat keys 10, the partition plates 11, the limit steps 12, etc., are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims (5)

1. A transmission gear transmission mechanism comprises a shell (1), a positioning ring (2), a supporting ring (3), a bearing assembly (4), a transmission shaft (5) and an output gear (6), and is characterized in that a plurality of positioning screw holes (7) are formed in the shell (1) and the positioning ring (2) in the circumferential direction, the positioning ring (2) is fixed in the shell (1) through nuts, the supporting ring (3) and the positioning ring (2) are arranged in parallel, conical positioning points (8) corresponding to the positioning screw holes (7) are formed in the end face of the supporting ring, the end part of each nut is matched with the structure of each positioning point (8), the rear part of the supporting ring (3) is supported through a stop block (9), the transmission shaft (5) is matched with the output gear (6) through a flat key (10), and the end part of the transmission shaft (5) is in clearance fit with the shell (1) and the positioning ring (2) and extends out of, the bearing assemblies (4) are arranged at the neck of the transmission shaft (5), and the outer parts of the bearing assemblies (4) are abutted against the support ring (3) and the stop block (9).

2. A transmission gear transmission mechanism according to claim 1, wherein the bearing assembly (4) comprises an outer ring, an inner ring (4 a), a cage (4 b) and balls (4 c), the cage (4 b) is provided with a plurality of ball grooves (4 d) which are spaced from each other and are arranged in opposite directions, two support surfaces in the ball grooves (4 d) are of arc surface structures, the balls (4 c) are cylindrical and are clamped in the ball grooves (4 d), and the inner ring (4 a) is provided with an annular groove for the balls (4 c) to be embedded in.

3. A transmission gear transmission according to claim 2, characterised in that the number of bearing assemblies (4) is three and that a spacer (11) is provided between each two adjacent bearing assemblies (4).

4. A transmission gear transmission according to claim 1, characterised in that the end of the drive shaft (5) is provided with a limit step (12).

5. A transmission gear unit according to claim 1 or 4, characterised in that the centre of the drive shaft (5) is of hollow configuration.