CN204805437U - Speed reducer and mechanical device - Google Patents

Abstract

The utility model relates to a reducer and a mechanical device. The reducer (1) includes: an input shaft (21); a first transmission chain mechanism (22), including: a first output shaft (224); M first The intermediate shafts (221, 222, 223), the input shaft (21), the M first intermediate shafts (221, 222, 223) and the first output shafts (224) are meshed through gears, and M is a positive integer; Two transmission chain mechanisms (23), comprising: a second output shaft (234); an idler wheel (230a); N second intermediate shafts (231, 232, 233), the input shaft (21), the idler wheel (230a), N second intermediate shafts (231, 232, 233) and the second output shaft (234) are meshed through gears, N is a positive integer, and |NM| is an even number. In this way, the rotation direction of the first output shaft is opposite to the rotation direction of the second output shaft, and the outputs of the first output shaft and the second output shaft have high synchronization.

Description

Reducers and Mechanisms

technical field

The utility model relates to the field of reducers, in particular to a reducer and a mechanical device including the reducer.

Background technique

The reducer is a reduction transmission device used between the prime mover and the working machine or the actuator to match the speed and transmit the torque. Reducers are widely used in many fields, such as metallurgy, nonferrous metals, coal, building materials, ships, water conservancy, electric power, construction machinery and petrochemical industries. The use of gear units in pulp presses in the paper industry is an example of this. The traditional pulping machine uses two reducers and two motors to drive the two main shafts of the working machine respectively. The first motor is connected to the first main shaft of the working machine through the first reducer to drive the first main shaft of the working machine to rotate in the first direction (clockwise or counterclockwise), and the second motor passes through The second reducer is connected with the second main shaft of the working machine to drive the second main shaft of the working machine to rotate in the second direction (counterclockwise or clockwise). In this way, the two main shafts of the working machine rotate in opposite directions, thereby playing the role of squeezing.

Utility model content

One of the objects of the present invention is to provide a reducer comprising two output shafts with high synchronization.

One aspect of the present utility model provides a reducer, including: an input shaft; a first transmission chain mechanism, including: a first output shaft; M first intermediate shafts, the input shaft, M first intermediate shafts and the first An output shaft meshes through gears, M is a positive integer; a second transmission chain mechanism includes: a second output shaft; an idler; N second intermediate shafts, input shaft, idler, and N second intermediate shafts It meshes with the second output shaft through a gear, N is a positive integer, and |N-M| is an even number. In this way, the rotation direction of the first output shaft is opposite to the rotation direction of the second output shaft, and the outputs of the first output shaft and the second output shaft have high synchronization.

In another exemplary embodiment of the speed reducer, the axis center of the input shaft, the axis centers of the M first intermediate shafts and the axis centers of the first output shaft are broken lines, and the axis center of the input shaft, A line connecting the axis of the idler gear, the axes of the N second intermediate shafts and the axis of the second output shaft is in the shape of a broken line. In this way, the size of the reducer in the Y direction (width direction) can be reduced, making the structure of the reducer more compact and reducing the installation space of the reducer.

In yet another exemplary embodiment of the speed reducer, the input shaft, the idler gear, the N second intermediate shafts and the second output shaft are sequentially meshed through gears. The idler gear meshes with the input shaft. Since the size of the input shaft is generally small, the idler gear can also be made smaller, reducing the volume.

In yet another exemplary embodiment of the speed reducer, the total speed ratio of the first transmission chain mechanism is equal to the total speed ratio of the second transmission chain mechanism. The two are connected with the same input shaft, so that the rotational speeds of the first output shaft and the second output shaft are the same.

In yet another exemplary embodiment of the reducer, M=N. In this way, the series difference between the first transmission chain mechanism and the second transmission chain mechanism is small, so that the overall structure of the reducer is balanced.

In yet another exemplary embodiment of the reducer, the speed ratio of each stage in the first transmission chain mechanism is the same as the speed ratio of each stage in the second transmission chain mechanism. In this way, the structures of the first transmission chain mechanism and the second transmission chain mechanism can be more balanced, and the output can be more balanced.

In yet another exemplary embodiment of the reducer, M=1 or 2 or 3, and N=1 or 2 or 3. This makes the reducer achieve a good balance between the overall speed ratio and the overall volume.

Another aspect of the present utility model provides that the mechanical device includes: the above-mentioned reducer; a power device connected to the input shaft of the reducer; a working machine including a first main shaft and a second main shaft, the first main shaft It is connected with the first output shaft of the reducer, and the second main shaft is connected with the second output shaft of the reducer. The rotation direction of the first output shaft is opposite to the rotation direction of the second output shaft, and the outputs of the first output shaft and the second output shaft have high synchronization.

Description of drawings

The above characteristics, technical features, advantages and implementation methods of the utility model will be further described in a clear and understandable manner by describing the preferred embodiments and in conjunction with the accompanying drawings, wherein:

Fig. 1 is a schematic diagram of an explosion structure of a reducer provided by an embodiment of the present invention;

Fig. 2 is a schematic diagram of observing the transmission mechanism in the housing in Fig. 1 along the X direction;

Fig. 3 is a schematic cross-sectional structure diagram along AA' of Fig. 2;

Fig. 4 is a structural block diagram of a mechanical device provided by an embodiment of the present invention.

Label description:

1 reducer

2 power units

3 working machine 31 first spindle 32 second spindle

10 shell

20 transmission mechanism

21 Input shaft 21a Input shaft gear

22 The first transmission chain mechanism

221, 222, 223 first intermediate shaft

221a, 222a, 223a the input gear of the first intermediate shaft

221b, 222b, 223b output gears of the first intermediate shaft

224 first output shaft 224a first output shaft gear

23 The second transmission chain mechanism

230 idler shaft 230a idler

231, 232, 233 second intermediate shaft

231a, 232a, 233a The input gear of the second intermediate shaft

231b, 232b, 233b output gears of the second intermediate shaft

234 Second output shaft 234a The gear of the second output shaft

Detailed ways

In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation of the utility model is now described with reference to the accompanying drawings, and the same symbols in each figure represent the same parts.

The figures discussed below and the various embodiments used to describe the principles of the disclosure in this patent document are by way of illustration only and should not be construed in any way to limit the scope of the disclosure. Those skilled in the art will understand that the principles of the present disclosure may be implemented in any suitably arranged device. The various innovative teachings of the present application will be described with reference to exemplary, non-limiting embodiments.

In this article, "schematic" means "serving as an example, example or illustration", and any illustration or implementation described as "schematic" should not be interpreted as a more preferred or more advantageous Technical solutions.

In order to make the drawing concise, each drawing only schematically shows the parts related to the utility model, and they do not represent its actual structure as a product. In addition, to make the drawings concise and easy to understand, in some drawings, only one of the components having the same structure or function is schematically shown, or only one of them is marked.

Fig. 1 is a schematic diagram of an exploded structure of a reducer provided by an embodiment of the present invention. It can be seen from FIG. 1 that the speed reducer 1 includes a housing 10 and a transmission mechanism 20 assembled in the housing 10 . The housing 10 includes a bottom surface, four side surfaces and a top surface. The bottom and top surfaces are parallel to the X-Y plane. Two of the sides are parallel to the Y-Z plane, and the other two sides are parallel to the Y-Z plane.

FIG. 2 is a schematic view of the transmission mechanism in the housing in FIG. 1 viewed along the X direction. Fig. 3 is a schematic cross-sectional structure diagram along AA' of Fig. 2 . As can be seen from FIG. 1 , FIG. 2 and FIG. 3 , the transmission mechanism 20 includes an input shaft 21 , a first transmission chain mechanism 22 and a second transmission chain mechanism 23 .

The first transmission chain mechanism 22 includes: a first output shaft 224; M first intermediate shafts 221, 222, 223, where M is a positive integer. In the figure, M=3, that is, the first transmission chain mechanism 22 includes three first intermediate shafts 221 , 222 , 223 as an example, but it is not limited thereto. For example, M=1 or 2 or 3 or . . . The value of M can be considered in balance between the total speed ratio and the total volume. The smaller the value of M, the fewer the number of transmission stages from the input shaft 21 to the first output shaft 224, the simpler the structure of the reducer, the smaller the volume, but the smaller the overall speed ratio; The more transmission stages from the input shaft 21 to the first output shaft 224, the more complex the structure of the reducer, the larger the volume, but the larger the overall speed ratio. The input shaft 21, the M first intermediate shafts 221, 222, 223 and the first output shaft 224 are meshed through gears. Specifically, the speed reducer 1 also includes a gear 21a of the input shaft, coaxial with the input shaft 21 and fixedly connected. It should be noted that the fixed connection between the gear and the shaft described in this application document means that no relative displacement can occur between the gear and the shaft in the direction of rotation. In an exemplary embodiment, the fixed connection between the gear and the shaft may be an integrated structure, or a key connection is used between the two. The connection mode between the gear and the shaft will not be repeated below. The first transmission chain mechanism 22 also includes the input gear 221a of the first intermediate shaft 221 of the first stage and the output gear 221b of the first intermediate shaft 221 of the first stage, both of which are fixedly connected with the first intermediate shaft 221 of the first stage; The input gear 222a of the first intermediate shaft 222 of the second stage and the output gear 222b of the first intermediate shaft 222 of the second stage are both fixedly connected with the first intermediate shaft 222 of the second stage; the input of the first intermediate shaft 223 of the third stage The gear 223a and the output gear 223b of the first intermediate shaft 223 of the third stage are both fixedly connected with the first intermediate shaft 223 of the third stage; the gear 224a of the first output shaft 224 is fixedly connected with the first output shaft 224 . The input gear 221a of the first intermediate shaft 221 of the first stage meshes with the gear 21a of the input shaft 21, the input gear 222a of the first intermediate shaft 222 of the second stage meshes with the output gear 221b of the first intermediate shaft 221 of the first stage, and the third The input gear 223a of the first intermediate shaft 223 of the first stage meshes with the output gear 222b of the first intermediate shaft 222 of the second stage, and the gear 224a of the first output shaft 224 meshes with the output gear 223b of the first intermediate shaft 223 of the third stage. In this way, the input shaft 21 transmits the power of the external equipment (such as a motor) step by step to the first output shaft 224 through M first intermediate shafts, and the total speed ratio of the first transmission chain mechanism 22 (or referred to as the transmission ratio) is the product of the speed ratios of all stages.

The second transmission chain mechanism 23 includes: a second output shaft 234; an idler wheel 230a; N second intermediate shafts 231, 232, 233, where N is a positive integer. In the figure, N=3, that is, the second transmission chain mechanism 23 includes three first intermediate shafts 221 , 222 , 223 as an example, but it is not limited thereto. For example, N=1 or 2 or 3 or . . . The value of N can be considered in balance between the total speed ratio and the total volume. The smaller the value of N, the fewer the number of transmission stages from the input shaft 21 to the second output shaft 234, the simpler the structure of the reducer, the smaller the volume, but the smaller the overall speed ratio; the larger the value of N, from The more transmission stages from the input shaft 21 to the second output shaft 234, the more complex the structure of the reducer, the larger the volume, but the larger the overall speed ratio. The input shaft 21, the idler gear 230a, the N second intermediate shafts 231, 232, 233 and the second output shaft 234 are meshed through gears. Specifically, the second transmission chain mechanism 23 also includes an idler shaft 230, which is fixedly connected with the idler 230a; the input gear 231a of the second countershaft 231 of the first stage and the output gear 231b of the second countershaft 231 of the first stage; Both are fixedly connected with the second intermediate shaft 231 of the first stage; the input gear 232a of the second intermediate shaft 232 of the second stage and the output gear 232b of the second intermediate shaft 232 of the second stage are both connected with the second intermediate shaft of the second stage The shaft 232 is fixedly connected; the input gear 233a of the second intermediate shaft 233 of the third stage and the output gear 233b of the second intermediate shaft 223 of the third stage are both fixedly connected with the second intermediate shaft 233 of the third stage; the second output shaft The gear 234a of 234 is fixedly connected with the second output shaft 234 . The idler gear 230a meshes with the gear 21a of the input shaft 21, the input gear 231a of the second intermediate shaft 231 of the first stage meshes with the idler gear 230a, and the input gear 232a of the second intermediate shaft 232 of the second stage meshes with the second intermediate shaft of the first stage. The output gear 231b of 231 meshes, the input gear 233a of the third-stage second countershaft 233 meshes with the output gear 232b of the second-stage second countershaft 232, and the gear 234a of the second output shaft 234 meshes with the third-stage second countershaft The output gear 233b of 223 is engaged. In this way, the input shaft 21 transmits the power of the external equipment (such as a motor) to the second output shaft 234 step by step through the idler gear and N second intermediate shafts, and the total speed ratio of the second transmission chain mechanism 23 (or referred to as Transmission ratio) is the product of the speed ratios of each stage.

In addition, |N-M| (that is, the absolute value of N-M) is an even number (including 0). In this way, since the idler wheel changes the rotation direction of the output shaft, the stage difference between the first transmission chain mechanism 22 and the second transmission chain mechanism 23 is an odd number, and the two are connected with the same input shaft, so the rotation of the first output shaft 224 The direction is opposite to the direction of rotation of the second output shaft 234 . At the same time, since the first transmission chain mechanism 22 and the second transmission chain mechanism 23 are connected to the same input shaft 21 , the synchronization between the outputs of the first output shaft 224 and the second output shaft 234 is improved. In an exemplary embodiment, M=N, so that the stage difference between the first transmission chain mechanism 22 and the second transmission chain mechanism 23 is small (one idler wheel difference), so that the overall structure of the reducer is balanced.

In an exemplary embodiment, the total speed ratio of the first transmission chain mechanism 22 is equal to the total speed ratio of the second transmission chain mechanism 23, and both are connected with the same input shaft, so that the first output shaft 224 and the second transmission chain mechanism The rotational speeds of the two output shafts 234 are the same. In an exemplary embodiment, M=N, and the speed ratio of each stage in the first transmission chain mechanism 22 is the same as the speed ratio of each stage (except the idler wheel) in the second transmission chain mechanism 23 . Because the idler only changes the direction of rotation of the output shaft but does not change the speed ratio, the total speed ratio of the second transmission chain mechanism 23 has nothing to do with the idler wheel, so the total speed ratio of the first transmission chain mechanism 22 and the second transmission chain mechanism The total speed ratios of 23 are equal, which can make the structure of the first transmission chain mechanism 22 and the second transmission chain mechanism 23 more balanced, and the output is more balanced.

An embodiment is schematically shown in FIG. 2 , where the input shaft 21 , the idler gear 230 a , N second intermediate shafts 231 , 232 , 233 and the second output shaft 234 are sequentially meshed through gears. The idler 230a is meshed with the input shaft 21. Since the size of the input shaft 21 is generally small, the idler 230a can also be made smaller, reducing the volume. But it is not limited thereto. In other exemplary embodiments, the idler gear 230 a is located between any two of the input shaft 21 , N second intermediate shafts, and second output shafts 234 . In addition, one embodiment is schematically shown in FIG. 2 , and there is one idler; however, it is not limited thereto. In other exemplary embodiments, there are plural idlers.

Continuing to refer to Fig. 2, the axis center of input shaft 21, the axis centers of M first intermediate shafts 221, 222, 223 and the axis center of first output shaft 224 are in broken line shape (the first broken line), and input shaft 21 The axis of the idler gear 230a, the axis of the N second intermediate shafts 231, 232, 233 and the axis of the second output shaft 234 are broken lines (second broken lines). The axis of each shaft and the axis of the gear are parallel to the X direction and perpendicular to the Y and Z directions; the axis of each axis and the axis of the gear are the corresponding axes on the same plane (Y-Z plane) projection. The axis lines are arranged in parallel, but not all lie in one plane. The first folded line has projection components in the Y direction and the Z direction, and the second fold line has projection components in the Y direction and the Z direction, which can reduce the size of the reducer 1 in the Y direction (width direction), so that the structure of the reducer 1 More compact, reducing the installation space of the reducer 1.

Fig. 4 is a structural block diagram of a mechanical device provided by an embodiment of the present invention. As can be seen from Fig. 4, the mechanical device includes the above-mentioned speed reducer 1; a power unit 2 connected with the input shaft 21 of the speed reducer 1; a working machine 3 including a first main shaft 31 and a second main shaft 32 , the first main shaft 31 is connected to the first output shaft 224 of the reducer 1 and the second main shaft 32 is connected to the second output shaft 234 of the reducer 1 . In an exemplary embodiment, the mechanical device is a pulp press. In an exemplary embodiment, the power device 2 is an electric motor. In an exemplary embodiment, between the first main shaft 31 and the first output shaft 224, between the second main shaft 32 and the second output shaft 234, between the motor 2 and the input shaft 21 through couplings (not shown icon) connection.

It should be understood that although this specification is described according to various implementations, not each implementation only includes an independent technical solution. This description of the specification is only for clarity, and those skilled in the art should take the specification as a whole. The technical solutions in the various implementation modes can also be properly combined to form other implementation modes that can be understood by those skilled in the art.

A series of detailed descriptions listed above are only specific descriptions for the feasible embodiments of the present utility model, and they are not intended to limit the scope of protection of the present utility model. Embodiments or changes should be included within the protection scope of the present utility model.

Claims (8)

1. speed reducer, is characterized in that, comprising:

An input shaft (21);

First driving chain mechanism (22), comprising:

First output shaft (224);

M the first jack shaft (221,222,223), described input shaft (21), M the first jack shaft (221,222,223) and the first output shaft (224) are by gears meshing, and M is positive integer;

Second driving chain mechanism (23), comprising:

Second output shaft (234);

An idle pulley (230a);

N number of second jack shaft (231,232,233), described input shaft (21), idle pulley (230a), N number of second jack shaft (231,232,233) and the second output shaft (234) pass through gears meshing, N is positive integer, | N-M| is even number.

2. speed reducer as claimed in claim 1, it is characterized in that, the line in the axle center of described input shaft (21), a M axle center of the first jack shaft (221,222,223) and the axle center of the first output shaft (224) is polyline shaped, and the line in the axle center of described input shaft (21), the axle center of idle pulley (230a), the axle center of N number of second jack shaft (231,232,233) and the axle center of the second output shaft (234) is polyline shaped.

3. speed reducer as claimed in claim 1, it is characterized in that, input shaft (21), idle pulley (230a), N number of second jack shaft (231,232,233) and the second output shaft (234) sequentially pass through gears meshing successively.

4. speed reducer as claimed in claim 1, it is characterized in that, total speed ratio of described first driving chain mechanism (22) is equal with total speed ratio of described second driving chain mechanism (23).

5. speed reducer as claimed in claim 4, is characterized in that, M=N.

6. speed reducer as claimed in claim 5, it is characterized in that, in the first driving chain mechanism (22), the speed ratio of every one-level is identical with the speed ratio of one-level every in the second driving chain mechanism (23).

7. speed reducer as claimed in claim 5, is characterized in that, M=1 or 2 or 3, N=1 or 2 or 3.

8. mechanical device, is characterized in that, comprising:

A speed reducer (1) as described in any one of claim 1-7;

A power plant (2), is connected with the input shaft (21) of described speed reducer (1);

A working machine (3), comprise first main shaft (31) and second main shaft (32), described first main shaft (31) is connected with first output shaft (224) of described speed reducer (1), and described second main shaft (32) is connected with second output shaft (234) of described speed reducer (1).