CN216407640U

CN216407640U - Chain transmission speed reducer

Info

Publication number: CN216407640U
Application number: CN202122491308.9U
Authority: CN
Inventors: 夏泽民; 邬逵清; 刘文贵
Original assignee: Jiangsu Changling Hydraulic Co ltd
Current assignee: Jiangsu Changling Hydraulic Co ltd
Priority date: 2021-10-16
Filing date: 2021-10-16
Publication date: 2022-04-29
Anticipated expiration: 2031-10-16

Abstract

The utility model discloses a chain transmission speed reducer which comprises a shell, wherein a first shaft hole and a second shaft hole which are parallel to each other are arranged in the shell, a base which is integrated with the shell is arranged at the bottom of the shell, a driving wheel shaft and a driven wheel shaft are respectively positioned in the first shaft hole and the second shaft hole, a driving chain wheel and a driven chain wheel with the diameter larger than that of the driving chain wheel are respectively arranged on the driving wheel shaft and the driven wheel shaft, bearings are respectively arranged between the driving wheel shaft and the first shaft hole and between the driven wheel shaft and the second shaft hole, damping pads are respectively arranged between the bearings and the first shaft hole and between the bearings and the second shaft hole, the driving wheel shaft is in transmission connection with a driving device, and the driving chain wheel is in transmission connection with the driven chain wheel through a chain. The chain wheel is adopted for transmission, the manufacturing cost of the whole speed reducer is reduced, the manufacturing is more convenient due to the simple structure, the speed reducer can adapt to output shafts and input shafts with large intervals, and the transmission ratio can be adjusted by changing the size of the chain wheel.

Description

Chain transmission speed reducer

Technical Field

The utility model relates to a speed reducer, in particular to a speed reducer for changing speed by chain transmission.

Background

The speed reducer is a component consisting of gear drive, worm drive and gear-worm drive which are enclosed in a rigid shell, is commonly used as a speed reduction transmission device between a prime mover and a working machine, plays a role in matching rotating speed and transmitting torque between the prime mover and the working machine or an actuating mechanism, and is widely applied to modern machinery.

However, the gear transmission has high requirements on manufacturing and installation, is not suitable for transmission between two shafts which are far away from each other, and has difficult adjustment of the transmission ratio of the speed reducer due to the relatively fixed wheel axle distance; the vibration damping and impact resistance of gear transmission are far less good than those of flexible transmission such as belt transmission. Conventional reducers utilizing gear transmissions have a large impact and noise in operation and generate dynamic loads.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide a speed reducer for speed change by using chain transmission, which can effectively and reasonably overcome the problems caused by the adoption of gear transmission in the speed reducer.

In order to achieve the purpose, the technical scheme of the utility model is to provide a chain transmission speed reducer which comprises a shell 1, wherein a first shaft hole and a second shaft hole which are parallel to each other are arranged in the shell 1, a base which is integrated with the shell is arranged at the bottom of the shell, a driving wheel shaft 2 and a driven wheel shaft 3 are respectively positioned in the first shaft hole and the second shaft hole, a driving chain wheel 4 and a driven chain wheel 5 with the diameter larger than that of the driving chain wheel are respectively arranged on the driving wheel shaft 2 and the driven wheel shaft 3, bearings are respectively arranged between the driving wheel shaft and the first shaft hole and between the driven wheel shaft and the second shaft hole, shock absorption pads 10 are respectively arranged between the bearings and the first shaft hole and between the bearings and the second shaft hole, the driving wheel shaft is in transmission connection with a driving device 6, and the driving chain wheel is in transmission connection with the driven chain wheel through a chain 7. The chain wheel is adopted for transmission, so that the manufacturing cost of the whole speed reducer is reduced, the structure is simple, the manufacturing is more convenient, the speed reducer can adapt to output shafts and input shafts with large intervals, and the transmission ratio can be adjusted by changing the size of the chain wheel.

As a further improvement of the utility model, the driving wheel shaft 2 is provided with a tapered roller bearing 8 respectively at two end surfaces close to the first shaft hole in the first shaft hole. The tapered roller bearing can bear large radial load and axial load, so that the tapered roller bearing can play a role in fixing the driving wheel shaft 2 in the axial direction.

As a further improvement of the present invention, the driven wheel shaft 3 is provided with a needle bearing 9 in the second shaft hole near each of the two end surfaces of the second shaft hole. The working surface of the needle roller bearing has a lubricating function, so that the rotating friction resistance of the driven wheel shaft 3 is small, and the rotation is more stable.

As a further improvement of the present invention, the driving device 6 is a motor with brake, the motor and the driving sprocket 4 are respectively located at two sides of the housing 1, and the motor shaft is coaxial with the driving wheel shaft 2. The reducer has the advantages of rapid braking, high reliability and the like by adopting the motor with the brake.

As a further improvement of the utility model, the end face of the shell on the same side with the driving sprocket is provided with a groove 11, and the driving sprocket, the driven sprocket and the chain are arranged in the groove. By adopting the structure, the structure of the speed reducer is more compact.

As a further improvement of the utility model, the driving wheel shaft 2 and the driven wheel shaft 3 are hollow shafts, and two ends of the driven wheel shaft are provided with a plurality of connecting holes 19 which are uniformly distributed in the circumferential direction. The hollow shaft can reduce the dead weight of the speed reducer; the coupling hole 19 of the driven wheel shaft facilitates the output of torque to the working shaft and simplifies the coupling.

As a further improvement of the present invention, a plastic chain guide 13 is fixedly attached to the housing, and a chain portion between the driving sprocket and the driven sprocket is disposed in the plastic chain guide. The plastic chain guide rail is used for supporting and guiding the chain, so that the friction of the chain is reduced, the noise is reduced, and the service life of the chain is prolonged.

As a further improvement of the present invention, the two side faces of the housing perpendicular to the driving wheel shaft are provided with cover plates 14, the cover plates are provided with holes for the driving wheel shaft and the driven wheel shaft to pass through, and the cover plates are matched with the shape of the housing 1 and detachably connected to the base. The cover plate can improve the appearance of the speed reducer and can protect an operator.

As a further improvement of the utility model, the chain is provided with a tension sprocket 15. The wrap angle of the chain wheel can be changed by the tensioning chain wheel, so that the chain is tensioned, and the reliability of chain transmission is further improved.

As a further improvement of the utility model, the base is provided with support frames 16 positioned at two ends of the driven wheel shaft, two ends of the driven wheel shaft penetrate through the support frames, and the support frames are provided with bearings matched with the driven wheel shaft. The support frame can make driven wheel axle more steady in the rotation process.

The utility model has the advantages and beneficial effects that:

the chain wheel is adopted for transmission, the manufacturing cost of the whole speed reducer is reduced, the manufacturing is more convenient due to the simple structure, the speed reducer can adapt to output shafts and input shafts with large intervals, and the transmission ratio can be adjusted by changing the size of the chain wheel. The speed reducer has the advantages of rapid braking, high reliability and the like. The tapered roller bearing can bear larger radial load and axial load, so that the tapered roller bearing can fix the driving wheel shaft in the axial direction. The working surface of the needle roller bearing has a lubricating function, so that the rotating friction resistance of the driven wheel shaft is small, and the rotation is more stable. The coupling bore 19 of the driven axle facilitates the output of torque to the working axle. The plastic chain guide rail is used for supporting and guiding the chain, so that the friction of the chain is reduced, the noise is reduced, and the service life of the chain is prolonged. The support frame can make driven wheel axle more steady in the rotation process.

Drawings

FIG. 1 is a schematic diagram of an embodiment 1 of a chain drive reducer;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 1;

FIG. 4 is a schematic illustration of embodiment 2 of the chain drive reducer;

FIG. 5 is a schematic view of embodiment 3 of the chain drive reducer;

fig. 6 is a schematic diagram of embodiment 4 of the chain drive reducer.

In the figure: 1-shell 2-driving wheel shaft 3-driven wheel shaft 4-driving chain wheel 5-driven chain wheel 6-driving device 7-chain 8-tapered roller bearing 9-needle bearing 10-shock pad 11-groove 12-bolt 13-plastic chain guide rail 14-cover plate 15-tensioning chain wheel 16-support frame 17-pinion gear 18-bull gear 19-connecting hole

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby. Parts are not shown for ease of illustration.

Example 1:

as shown in fig. 1, 2 and 3, a first shaft hole and a second shaft hole which are parallel to each other are arranged in a shell 1, a base which is integrated with the shell is arranged at the bottom of the shell, a driving wheel shaft 2 and a driven wheel shaft 3 are respectively positioned in the first shaft hole and the second shaft hole, a driving chain wheel 4 and a driven chain wheel 5 with a diameter larger than that of the driving chain wheel are respectively arranged on the driving wheel shaft 2 and the driven wheel shaft 3, shock absorbing pads 10 are respectively arranged between a bearing and the first shaft hole and the second shaft hole, the driving wheel shaft 2 is in transmission connection with a driving device 6, and the driving chain wheel is in transmission connection with the driven chain wheel through a chain 7. Two end faces of the driving wheel shaft 2, close to the first shaft hole, in the first shaft hole are respectively provided with a tapered roller bearing 8, a shock pad 10 is arranged between the tapered roller bearing 8 and the first shaft hole, two end faces of the driven wheel shaft 3, close to the second shaft hole, in the second shaft hole are respectively provided with a needle roller bearing 9, and the shock pad 10 is arranged between the needle roller bearings 9 and the second shaft hole. The end face of the shell 1 on the same side as the driving chain wheel is provided with a groove 11, and the driving chain wheel, the driven chain wheel and the chain are arranged in the groove. Two side faces, perpendicular to the driving wheel shaft, of the shell 1 are provided with cover plates 14, holes for the driving wheel shaft and the driven wheel shaft to penetrate through are formed in the cover plates 14, and the cover plates are matched with the shape of the shell 1 and detachably connected to the base. The driving device 6 is a motor with brake, the motor and the driving chain wheel 4 are respectively positioned at two sides of the shell 1, and a motor shaft is coaxial with the driving wheel shaft 2. The base is provided with a screw hole, and the motor is fixed on the base through a bolt 12 matched with the screw hole. The driving wheel shaft 2 and the driven wheel shaft 3 are hollow shafts, and two ends of the driven wheel shaft are respectively provided with 6 connecting holes 19 which are uniformly distributed in the circumferential direction. Two symmetrical tensioning sprockets 15 are provided on the chain.

Example 2

As shown in fig. 4, the difference from embodiment 1 is that: the shell 1 is fixedly connected with a plastic chain guide rail 13, and a chain part between the driving chain wheel and the driven chain wheel is arranged in the plastic chain guide rail.

Example 3:

as shown in fig. 5, the difference from embodiment 2 is that: the base is provided with support frames 16 positioned at two ends of the driven wheel shaft, two ends of the driven wheel shaft penetrate through the support frames, and the support frames 16 are provided with bearings matched with the driven wheel shaft.

Example 4:

as shown in fig. 6, the difference from embodiment 1 is that: the motor shaft and the driving wheel shaft 2 are not coaxial, the motor shaft and the driving wheel shaft are driven through a small gear 17 and a large gear 18 which are respectively arranged on the motor shaft and the driving wheel shaft, and the transmission ratio of the gear 17 to the gear 18 is 1: 2.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A chain drive reducer, characterized in that: including casing (1), be equipped with the shaft hole one and the shaft hole two that are parallel to each other in casing (1), the casing bottom has the base integrative with the casing, drive wheel axle (2) and driven wheel axle (3) are arranged in shaft hole one and shaft hole two respectively, be equipped with drive sprocket (4) and driven sprocket (5) that the diameter is greater than drive sprocket on drive wheel axle (2) and driven wheel axle (3) respectively, the drive wheel axle, between the shaft hole one and driven wheel axle, be equipped with between the shaft hole two and all be equipped with the bearing, all be equipped with shock pad (10) between bearing and shaft hole one and the shaft hole two, the drive wheel axle is connected with drive arrangement (6) transmission, drive sprocket passes through chain (7) transmission with driven sprocket and is connected.

2. The chain drive reducer of claim 1, wherein: and two end faces of the driving wheel shaft (2) close to the first shaft hole are respectively provided with a tapered roller bearing (8) in the first shaft hole.

3. The chain drive reducer of claim 2, wherein: and the driven wheel shaft (3) is respectively provided with a needle bearing (9) at two end faces close to the second shaft hole in the second shaft hole.

4. The chain drive reducer of claim 3, wherein: the driving device (6) is a motor with a brake function, the motor and the driving chain wheel (4) are respectively positioned on two sides of the shell, and a motor shaft is coaxial with the driving wheel shaft (2).

5. The chain drive reducer of claim 4, wherein: the end face of the shell (1) on the same side as the driving chain wheel is provided with a groove (11), and the driving chain wheel, the driven chain wheel and the chain are arranged in the groove.

6. A chain transmission reducer according to claim 5 in which the driving axle (2) and the driven axle (3) are both hollow shafts and the driven axle has a plurality of circumferentially spaced attachment holes (19) at each end.

7. A chain drive reducer according to claim 6 in which a plastic chain guide (13) is fixedly attached to the housing, the portion of the chain between the drive and driven sprockets being located within the plastic chain guide.

8. A chain transmission reducer according to claim 7 in which the housing has cover plates (14) on both sides perpendicular to the drive axle, the cover plates having holes for the drive and driven axles to pass through, the cover plates being adapted to the shape of the housing (1) and being detachably connected to the housing.

9. A chain drive reducer according to claim 8 in which the chain is provided with a tension sprocket (15).

10. The chain drive reducer according to claim 9, wherein the base is provided with support frames (16) at both ends of the driven axle, both ends of the driven axle passing through the support frames, and the support frames are provided with bearings engaged with the driven axle.