CN212429647U

CN212429647U - Speed change gear shifting device, speed change transmission case and moving platform

Info

Publication number: CN212429647U
Application number: CN202021571716.4U
Authority: CN
Inventors: 张韩笑; 邹洪未
Original assignee: Chongqing Jiayuanfu Technology Co ltd
Current assignee: Chongqing Jiayuanfu Technology Co ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2021-01-29
Anticipated expiration: 2030-07-31

Abstract

The utility model provides a speed change gear shifting device, speed change transmission case and moving platform, relate to vehicle variable speed technical field, this speed change gear shifting device includes input through shaft, output through shaft and a plurality of first drive assembly, each first drive assembly includes the first driving medium and the second driving medium of mutual transmission connection, a plurality of first driving medium intervals are installed on the input through shaft, a plurality of second driving medium intervals are installed on the output through shaft; a first clutch is arranged between the first transmission piece and the input through shaft; and/or a second clutch is arranged between the second transmission piece and the output through shaft. Compared with the prior art, the utility model provides a variable speed gearshift, input shaft and output shaft all adopt to lead to the hub connection, and the mounting means is more simple and convenient, and the modularization aggregate erection of being convenient for reduces the fault rate. Meanwhile, through shaft connection is adopted, the sequential extension and expansion of power can be realized during power input, speed change is realized on the basis, and the whole speed change transmission device is simpler.

Description

Speed change gear shifting device, speed change transmission case and moving platform

Technical Field

The utility model relates to a vehicle variable speed technical field particularly, relates to a variable speed gearshift, variable speed transmission case and moving platform.

Background

The traditional automobile gear box adopts mechanical clutch, is usually used for manual speed change, and lacks the capability of electric automatic speed change. The hydraulic speed change device adopted by the traditional engineering vehicle can conveniently realize the independent rotation speed control of the driving wheels at the left side and the right side, so the maneuverability and the flexibility are better than those of the traditional automobile. But has the defects of complex structure, low transmission efficiency, high production and manufacturing cost, high maintenance cost and the like.

The speed change device adopting the single-shaft input/double-shaft output of the electromagnetic clutch adjusts the single-shaft rotation input to the double-shaft rotation output, the electromagnetic clutch is connected with the two half shafts to pass in and out in the use mode of the electromagnetic clutch, if the clutch is in a disconnection state, the half shaft at the output end cannot further transmit the movement, so that the rotation movement cannot be extended or overlapped, and the further function expansion of the speed change device is limited.

In view of this, it is very important to design and manufacture a speed changing and gear shifting device that can realize the movement continuation or the superposition, and the installation mode is simpler and more convenient, and the modularization combination installation is convenient, and the failure rate is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a speed change gearshift, it can realize the motion and prolong or stack in the same direction as, and the mounting means is more convenient simultaneously, the modularization aggregate erection of being convenient for.

Another object of the utility model is to provide a speed change transmission case, it can realize that the motion is in the same direction as prolonging or the stack, and the mounting means is more convenient simultaneously, can realize the switching-over simultaneously.

Another object of the utility model is to provide a moving platform adopts logical hub connection, and the mounting means is more simple and convenient, and the modularization aggregate erection of being convenient for reduces the fault rate. Secondly, because the through shaft connection is adopted, the movement extension and the extension are realized, the speed change and reversing combination is realized on the basis, and the whole speed change transmission system is more concise and easy to realize and practical.

The utility model is realized by adopting the following technical scheme.

In one aspect, the present invention provides a speed change and gear shift device, comprising an input through shaft, an output through shaft and a plurality of first transmission assemblies, wherein the first transmission assemblies are used for transmitting power between the input through shaft and the output through shaft, each first transmission assembly comprises a first transmission member and a second transmission member which are in transmission connection with each other, the plurality of first transmission members are installed on the input through shaft at intervals and are in transmission connection with the input through shaft, and the plurality of second transmission members are installed on the output through shaft at intervals and are in transmission connection with the output through shaft;

a first clutch is arranged between the first transmission piece and the input through shaft, so that the first transmission piece is connected with the input through shaft through the first clutch;

and/or a second clutch is arranged between the second transmission piece and the output through shaft, so that the second transmission piece is connected with the output through shaft through the second clutch;

wherein, the first transmission piece or the second transmission piece without the clutch is a transmission shaft fixedly sleeved on the input through shaft, the output through shaft or the reversing output shaft.

Furthermore, the first transmission piece and the second transmission piece are both gears, and the first transmission piece and the second transmission piece are meshed with each other to form a first gear set, so that the rotation directions of the first transmission piece and the second transmission piece are opposite, and the transmission ratios of the first gear sets are different.

Furthermore, a transition transmission part is arranged between the first transmission part and the corresponding second transmission part, and the transition transmission part is in transmission connection with the first transmission part and the corresponding second transmission part respectively.

Furthermore, the first transmission piece, the second transmission piece and the transition transmission piece are all gears, and the transition transmission piece is meshed with the corresponding first transmission piece and the corresponding second transmission piece respectively to form a second gear set, so that the rotation directions of the first transmission piece and the second transmission piece are the same, and the transmission ratios of the second gear sets are different.

Furthermore, the speed-changing gear-shifting device also comprises a plurality of second transmission assemblies, the second transmission assemblies are used for transmitting power between the input through shaft and the output through shaft, each second transmission assembly comprises a third transmission piece, a fourth transmission piece and a steering transmission piece, the plurality of third transmission pieces are installed on the input through shaft at intervals, the plurality of fourth transmission pieces are installed on the output through shaft at intervals, and each steering transmission piece is in transmission connection with the corresponding third transmission piece and the corresponding fourth transmission piece;

a third clutch is arranged between the third transmission piece and the input through shaft, so that the third transmission piece is connected with the input through shaft through the third clutch;

and/or a fourth clutch is arranged between the fourth transmission piece and the output through shaft, so that the fourth transmission piece is connected with the output through shaft through the fourth clutch.

Furthermore, the third transmission member, the fourth transmission member and the steering transmission member are gears, and the steering transmission members are engaged with the corresponding third transmission member and fourth transmission member to form a third gear set, so that the third transmission member and the fourth transmission member have the same rotation direction, and the transmission ratios of the third gear sets are different.

In another aspect, the present invention provides a variable speed transmission case, including a reversing device and a variable speed gear shifting device, the variable speed gear shifting device includes an input through shaft, an output through shaft and a plurality of first transmission assemblies, the first transmission assemblies are used for transmitting power between the input through shaft and the output through shaft, each first transmission assembly includes a first transmission piece and a second transmission piece which are in transmission connection with each other, the plurality of first transmission pieces are installed on the input through shaft at intervals, and the plurality of second transmission pieces are installed on the output through shaft at intervals; a first clutch is arranged between the first transmission piece and the input through shaft, so that the first transmission piece is connected with the input through shaft through the first clutch; and/or a second clutch is arranged between the second transmission piece and the output through shaft, so that the second transmission piece is connected with the output through shaft through the second clutch. The reversing device comprises a reversing output shaft, a first reversing transmission group, a second reversing transmission group, a first reversing clutch and a second reversing clutch; the first reversing transmission group is in transmission connection with the output through shaft and is connected with the reversing output shaft through a first reversing clutch, and the first reversing transmission group is used for enabling the rotation direction of the reversing output shaft to be the same as the rotation direction of the output through shaft; the second reversing transmission group is in transmission connection with the output through shaft and is connected with the reversing output shaft through a second reversing clutch, and the second reversing transmission group is used for enabling the rotation direction of the reversing output shaft to be opposite to the rotation direction of the output through shaft.

Furthermore, the first reversing transmission set comprises a first reversing transmission piece, a second reversing transmission piece and a transitional reversing transmission piece, the first reversing transmission piece is installed on the output through shaft, the second reversing transmission piece is connected with the reversing output shaft through a first reversing clutch, and the transitional reversing transmission piece is in transmission connection with the first reversing transmission piece and the second reversing transmission piece respectively so that the first reversing transmission piece and the second reversing transmission piece rotate in the same direction; the second reversing transmission set comprises a third reversing transmission piece and a fourth reversing transmission piece, the third reversing transmission piece is installed on the output through shaft, the fourth reversing transmission piece is connected with the reversing output shaft through a second reversing clutch, and the third reversing transmission piece and the fourth reversing transmission piece are opposite in rotating direction.

Furthermore, the speed change transmission case also comprises a speed reducer which is in transmission connection with the input through shaft.

In another aspect, the utility model provides a moving platform, including driving piece, drive wheel and variable speed transmission case, the driving piece is connected with the input through-shaft transmission, and the drive wheel is connected with the transmission of switching-over output shaft.

The utility model discloses following beneficial effect has:

the utility model provides a pair of speed change gearshift, go through epaxial a plurality of first driving mediums of installation at the input, go through epaxial a plurality of second driving mediums of installation at the output, first driving medium is connected with the transmission of second driving medium, between first driving medium and the input logical axle, second driving medium and output lead to and have a department at least between the axle and be provided with the clutch, first driving medium leads to the hub connection through first clutch and input promptly, and/or, the second driving medium passes through the second clutch and leads to the hub connection with the output. During actual work, the external driving piece inputs power through the input through shaft, and the power input of the input through shaft can be transmitted to the output through shaft through the first transmission piece and the second transmission piece in sequence by the engagement of the first clutch and/or the second clutch, so that the power transmission is realized, the first transmission assembly is selected to perform the power transmission through selection, and the functions of speed changing and gear shifting can be realized. Compared with the prior art, the utility model provides a variable speed gearshift, input shaft and output shaft all adopt to lead to the hub connection, and the mounting means is more simple and convenient, and the modularization aggregate erection of being convenient for reduces the fault rate. Meanwhile, through shaft connection is adopted, the sequential extension and expansion of power can be realized during power input, speed change is realized on the basis, and the whole speed change transmission device is simpler.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a transmission shifting apparatus according to a first embodiment of the present invention;

fig. 2 is a schematic structural view of a speed change gear shifting device according to a second embodiment of the present invention;

fig. 3 is a schematic structural view of a speed change gear shifting device according to a third embodiment of the present invention;

fig. 4 is a schematic structural view of a transmission shifting apparatus according to a fourth embodiment of the present invention;

fig. 5 is a schematic structural view of a transmission shifting apparatus according to a fifth embodiment of the present invention;

fig. 6 is a schematic structural view of a transmission shifting apparatus according to a sixth embodiment of the present invention;

fig. 7 is a schematic structural view of a transmission shifting apparatus according to a seventh embodiment of the present invention;

fig. 8 is a schematic structural view of a transmission shifting apparatus according to an eighth embodiment of the present invention;

fig. 9 is a schematic structural view of a transmission shifting apparatus according to a ninth embodiment of the present invention;

fig. 10 is a schematic structural view of another form of a transmission shifting apparatus according to a ninth embodiment of the present invention;

fig. 11 is a schematic structural view of a transmission case according to a tenth embodiment of the present invention;

fig. 12 is a schematic structural diagram of a mobile platform according to an eleventh embodiment of the present invention.

Icon: 1-moving a platform; 10-a gear box; 100-a variable speed shifting device; 110-input through shaft; 130-output through shaft; 150-a first transmission assembly; 151-first transmission member; 153-a second transmission member; 155-a first clutch; 157-a second clutch; 159 — transition drive; 170-a second transmission assembly; 171-a third transmission member; 173-a fourth transmission member; 175-a steering drive; 177-a third clutch; 179-fourth clutch; 200-a reversing device; 210-a reversing output shaft; 230-a first reversing transmission group; 231-a first reversing drive; 233-a second reversing transmission member; 235-a transitional reversing drive; 250-a second reversing transmission group; 251-a third reversing drive member; 253-a fourth reversing drive; 270-a first reversing clutch; 280-a reducer; 290-a second reversing clutch; 300-a driver; 400-driving wheels; 500-power take-off.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "vertical", "horizontal", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the products of the present invention are usually placed when in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Features in the embodiments described below may be combined with each other without conflict.

First embodiment

Referring to fig. 1, the present embodiment provides a transmission shifting apparatus 100 mounted on a vehicle such as an automobile or a construction vehicle. The power can be extended smoothly by adopting a through shaft connection mode, the installation mode is simpler and more convenient, the modularized combination and installation are convenient, and the failure rate is reduced.

The speed change gear shifting device 100 provided by the embodiment comprises an input through shaft 110, an output through shaft 130 and a plurality of first transmission assemblies 150, wherein the first transmission assemblies 150 are used for transmitting power between the input through shaft 110 and the output through shaft 130, each first transmission assembly 150 comprises a first transmission piece 151 and a second transmission piece 153 which are in transmission connection with each other, the plurality of first transmission pieces 151 are installed on the input through shaft 110 at intervals, and the plurality of second transmission pieces 153 are installed on the output through shaft 130 at intervals.

In the present embodiment, a first clutch 155 is disposed between the first transmission member 151 and the input through shaft 110, so that the first transmission member 151 and the input through shaft 110 are connected by the first clutch 155; the second transmission member 153 is fixedly sleeved on the output through shaft 130, so that the second transmission member 153 and the output through shaft 130 can rotate synchronously.

In the present embodiment, the first clutch 155 is an electromagnetic clutch and is controlled by an external electronic control system. Of course, the first clutch 155 may be another type of clutch, such as a hydraulic clutch or an electromagnetic coil, for example, to connect or disconnect the input shaft 110.

It should be noted that in the present embodiment, the power transmission between the first transmission member 151 and the input through shaft 110 can be realized only through the first clutch 155, that is, there is no direct transmission relationship between the first transmission member 151 and the input through shaft 110, when the first clutch 155 is in the release state, the rotation of the input through shaft 110 does not affect the power of the first transmission member 151, and the first transmission member 151 keeps the state of not directly following the rotation of the input through shaft 110 and synchronously rotating. The second transmission member 153 is fixedly installed on the output through shaft 130, and when the second transmission member 153 is driven by the first transmission member 151 to rotate, the output through shaft 130 rotates synchronously with the second transmission member 153, that is, a direct power transmission relationship exists between the second transmission member 153 and the output through shaft 130.

It should be noted that in this embodiment, both the input shaft and the output shaft are in a through shaft form, that is, one shaft is adopted to transmit the power in the whole motion transmission process. All the first transmission members 151 are transmitted by fixedly sleeving or clutching connection through one input through shaft 110; all second output parts 153 are transmitted by a fixed or clutched connection via an output through-shaft 130.

Specifically, the first transmission member 151 and the second transmission member 153 are both gears, and the first transmission member 151 and the second transmission member 153 are engaged with each other to form a first gear set, so that the rotation directions of the first transmission member 151 and the second transmission member 153 are opposite, and the transmission ratios of the first gear sets are different. Of course, the first transmission member 151 and the second transmission member 153 may be in other transmission manners, such as power transmission between the input through shaft 110 and the output through shaft 130 via belt transmission or hinge transmission, and are not limited in this respect.

It should be noted that, in the present embodiment, the first transmission member 151 and the second transmission member 153 are directly engaged with each other to form a first gear set, and in other preferred embodiments, an even number of gears that are engaged with each other may be disposed between the first transmission member 151 and the second transmission member 153 to achieve transmission of the intermediate power, so the number of gears in the first gear set is not particularly limited herein. As long as the rotation directions of the input through shaft 110 and the output through shaft 130 can be reversed.

In this embodiment, the rotation direction of the input through shaft 110 is opposite to the rotation direction of the output through shaft, and the transmission ratios of the first gear sets are changed from the input end to the output direction, so as to form a plurality of different gears, and in actual operation, under the control of the external electronic control system, the first clutches 155 are alternatively engaged, and the rest are in a disconnected state, so as to realize the operation of engaging gears.

It should be noted that the present embodiment provides a speed change gear shifting device 100, which only uses a single input through shaft 110 and a single output through shaft 130 to realize power input and output, and has a plurality of gears, each gear is realized by a set of gears, the corresponding transmission ratio of each set of gears is different, the input through shaft 110 rotates at a certain rotation speed, after the first clutch 155 selecting a certain gear is engaged, the first clutch 155 engages the input through shaft 110, and the first transmission member 151 connected through the first clutch 155 transmits the rotation to the second transmission member 153 and transmits the rotation to the output through shaft 130. By selecting different first clutches 155, different rotational speed outputs are achieved.

For the manual separation and reunion of traditional motor transmission and shift, this embodiment speed change gear adopts electromagnetic clutch, need not manual separation and reunion and shifts again, only needs the input signal of telecommunication sequence can accomplish the variable speed, and is more nimble swift. In addition, when one of the first clutches 155 is in the engaged state, the remaining first clutches 155 are in the released state, that is, when one of the first transmission members 151 rotates, the other first transmission members 151 are kept in the state of not directly following the rotation of the input through shaft 110 and rotating synchronously.

In this embodiment, the first transmission assembly 150 is preferably 6, so that 6 gears are selectable. Of course, other numbers are possible and are not specifically limited herein.

In summary, the operating principle of the speed change gear shifting device 100 provided in the present embodiment is as follows: the external driving member 300 transmits power to the input shaft, the input shaft rotates at a certain rotating speed, the plurality of first clutches 155 are alternatively connected under the control of an external electric control system, the power is transmitted to the output through shaft 130 at a certain transmission ratio through the first clutches 155, the output through shaft 130 rotates at a certain rotating speed, gear engaging operation is achieved, different first clutches 155 are selected, and the rotating speeds of the output through shaft 130 are different. Compared with the prior art, the speed-changing and gear-shifting device 100 provided by the embodiment has the advantages that the input shaft and the output shaft are connected through the shaft, the installation mode is simpler and more convenient, the modularization combination installation is convenient, and the failure rate is reduced. Meanwhile, through shaft connection is adopted, the sequential extension and expansion of power can be realized during power input, speed change is realized on the basis, and the whole speed change transmission device is simpler.

Second embodiment

Referring to fig. 2, the present embodiment provides a gear shifting device 100, the basic structure and principle thereof and the technical effects thereof are the same as those of the first embodiment, and for the sake of brief description, the corresponding contents of the first embodiment can be referred to where the embodiment is not mentioned.

The gearshift 100 comprises an input through shaft 110, an output through shaft 130 and a plurality of first transmission assemblies 150, wherein the first transmission assemblies 150 are used for transmitting power between the input through shaft 110 and the output through shaft 130, each first transmission assembly 150 comprises a first transmission piece 151 and a second transmission piece 153 which are in transmission connection with each other, the first transmission pieces 151 are installed on the input through shaft 110 at intervals, and the second transmission pieces 153 are installed on the output through shaft 130 at intervals.

In this embodiment, a second clutch 157 is disposed between the second transmission member 153 and the output through shaft 130, so that the second transmission member 153 and the output through shaft 130 are connected through the second clutch 157. The first transmission member 151 is fixedly secured to the input through shaft 110 such that the first transmission member 151 and the input through shaft 110 can rotate synchronously.

In this embodiment, the second clutch 157 is an electromagnetic clutch and is controlled by an external electronic control system. Of course, the second clutch 157 may be another type of clutch, such as a hydraulic clutch or an electromagnetic coil, for example, to connect or disconnect the input shaft 110.

It should be noted that in this embodiment, the power transmission between the second transmission member 153 and the output through shaft 130 can be realized only through the second clutch 157, that is, there is no direct transmission relationship between the second transmission member 153 and the output through shaft 130, when the second clutch 157 is in the release state, the rotation of the second transmission member 153 does not affect the power of the output through shaft 130, and the output through shaft 130 keeps the state of synchronously rotating without following the rotation of the second transmission member 153 directly clutched and connected thereto. The first transmission member 151 is fixedly mounted on the input through shaft 110, and when the input through shaft 110 rotates at a certain rotation speed, the first transmission member 151 rotates synchronously, that is, a direct power transmission relationship exists between the first transmission member 151 and the input through shaft 110.

In this embodiment, the rotation direction of the input through shaft 110 is opposite to the rotation direction of the output through shaft, and the transmission ratios of the first gear sets are changed from the input end to the output direction, so as to form a plurality of different gears, and in actual operation, under the control of the external electronic control system, the second clutches 157 are alternatively engaged, and the rest are in a disconnected state, so as to realize the operation of engaging gears.

It should be noted that the speed change gear shifting device 100 provided in this embodiment only uses a single input through shaft 110 and a single output through shaft 130 to achieve power input and power output, and has a plurality of gears, each gear is achieved by a set of gears, the corresponding transmission ratio of each set of gears is different, the input through shaft 110 rotates at a certain rotation speed to drive the first transmission member 151 and the second transmission member 153 to rotate, after the second clutch 157 selecting a certain gear is engaged, the second clutch 157 engages with the output through shaft 130, and the second transmission member 153 transmits power to the output through shaft 130 through the second clutch 157, thereby driving the output through shaft 130 to rotate at a certain rotation speed. By selecting a different second clutch 157, a different rotational speed output is achieved.

Third embodiment

Referring to fig. 3, the present embodiment provides a gear shifting device 100, the basic structure and principle thereof and the technical effects thereof are the same as those of the first embodiment, and for the sake of brief description, the corresponding contents of the first embodiment can be referred to where the embodiment is not mentioned.

In the present embodiment, a first clutch 155 is disposed between the first transmission member 151 and the input through shaft 110, so that the first transmission member 151 and the input through shaft 110 are connected through the first clutch 155, and a second clutch 157 is disposed between the second transmission member 153 and the output through shaft 130, so that the second transmission member 153 and the output through shaft 130 are connected through the second clutch 157.

It should be noted that the first clutch 155 and the corresponding second clutch 157 on the same first transmission assembly 150 are in a synchronous engagement or disengagement state, when the synchronous engagement is performed, the first transmission assembly 150 achieves the effect of transmitting power according to a certain transmission ratio, the input through shaft 110 and the output through shaft 130 can achieve transmission through the first transmission member 151 and the second transmission member 153, and when the synchronous disengagement is performed, the first transmission assembly 150 does not achieve the effect of transmitting power, that is, no power is transmitted between the first transmission member 151 and the input through shaft 110, and no power is transmitted between the second transmission member 153 and the output through shaft 130.

In this embodiment, the rotation direction of the input through shaft 110 is opposite to the rotation direction of the output through shaft, and the transmission ratios of the first gear sets are changed from the input end to the output direction, so as to form a plurality of different gears.

In the speed change gear shifting device 100 provided by the embodiment, the first clutch 155 and the second clutch 157 realize power transmission, and when one set of the first transmission member 151 and the second transmission member 153 rotates, the rest of the first transmission member 151 and the rest of the second transmission member 153 are in a static state, so that power waste can be avoided, and transmission efficiency can be increased.

Fourth embodiment

Referring to fig. 4, the present embodiment provides a gear shifting device 100, the basic structure and principle thereof and the technical effects thereof are the same as those of the first embodiment, and for the sake of brief description, the corresponding contents of the first embodiment can be referred to where the embodiment is not mentioned.

The present embodiment differs from the first embodiment in that the clutches are randomly mounted on the input through shaft 110 and the output through shaft 130. That is, a part of the first transmission member 151 is connected to the input through shaft 110 through the first clutch 155, another part of the first transmission member 151 is fixedly sleeved on the input through shaft 110, a part of the second transmission member 153 is connected to the output through shaft 130 through the second clutch 157, another part of the second transmission member 153 is fixedly sleeved on the output through shaft 130, but at least one of the first transmission member 151 and the second transmission member 153 in the same first transmission assembly 150, that is, in the same set of the first transmission member 151 and the second transmission member 153, is provided with a clutch.

Fifth embodiment

Referring to fig. 5, the present embodiment provides a gear shifting device 100, the basic structure and principle thereof and the technical effects thereof are the same as those of the first embodiment, and for the sake of brief description, the corresponding contents of the first embodiment can be referred to where the embodiment is not mentioned.

In the present embodiment, a transition transmission member 159 is disposed between the first transmission member 151 and the corresponding second transmission member 153, and the transition transmission member 159 is in transmission connection with the first transmission member 151 and the corresponding second transmission member 153.

In this embodiment, the first transmission member 151, the second transmission member 153 and the transition transmission member 159 are all gears, and the transition transmission member 159 is engaged with the corresponding first transmission member 151 and the corresponding second transmission member 153 to form a second gear set, so that the rotation directions of the first transmission member 151 and the second transmission member 153 are the same, and the transmission ratios of the second gear sets are different.

The speed change gear shifting device 100 provided by the embodiment realizes the input and output of power only through the single input through shaft 110 and the single output through shaft 130, and has a plurality of gears, each gear is realized by a group of gears, the corresponding transmission ratio of each group of gears is different, the input through shaft 110 rotates at a certain rotation speed, after the first clutch 155 of a certain gear is selected to be connected, the first clutch 155 is meshed with the input through shaft 110, the rotation is transmitted to the transition transmission member 159 through the first transmission member 151 connected with the first clutch 155, and then is transmitted to the second transmission member 153 and is transmitted to the output through shaft 130. By selecting different first clutches 155, different rotational speed outputs are achieved. At the same time, the arrangement of the transition transmission 159 enables the direction of the input through-shaft 110 to be the same as that of the output through-shaft 130.

Sixth embodiment

Referring to fig. 6, the present embodiment provides a gear shifting device 100, the basic structure and principle thereof and the technical effects thereof are the same as those of the fifth embodiment, and for the sake of brief description, the corresponding contents of the fifth embodiment can be referred to where the embodiment is not mentioned.

In the present embodiment, the gearshift device 100 includes an input through shaft 110, an output through shaft 130, and a plurality of first transmission assemblies 150, the first transmission assemblies 150 are used for transmitting power between the input through shaft 110 and the output through shaft 130, each first transmission assembly 150 includes a first transmission member 151 and a second transmission member 153 that are in transmission connection with each other, the plurality of first transmission members 151 are installed on the input through shaft 110 at intervals, and the plurality of second transmission members 153 are installed on the output through shaft 130 at intervals.

Seventh embodiment

Referring to fig. 7, the present embodiment provides a gear shifting device 100, the basic structure and principle thereof and the technical effects thereof are the same as those of the fifth embodiment, and for the sake of brief description, the corresponding contents of the fifth embodiment can be referred to where the embodiment is not mentioned.

Eighth embodiment

Referring to fig. 8, the present embodiment provides a gear shifting device 100, the basic structure and principle thereof and the technical effects thereof are the same as those of the fifth embodiment, and for the sake of brief description, the corresponding contents of the fifth embodiment can be referred to where the embodiment is not mentioned.

The present embodiment is different from the fifth embodiment in that the clutches are randomly mounted on the input through shaft 110 and the output through shaft 130. That is, a part of the first transmission member 151 is connected to the input through shaft 110 through the first clutch 155, another part of the first transmission member 151 is fixedly sleeved on the input through shaft 110, a part of the second transmission member 153 is connected to the output through shaft 130 through the second clutch 157, another part of the second transmission member 153 is fixedly sleeved on the output through shaft 130, but at least one of the first transmission member 151 and the second transmission member 153 in the same first transmission assembly 150, that is, in the same set of the first transmission member 151 and the second transmission member 153, is provided with a clutch.

Ninth embodiment

Referring to fig. 9, the present embodiment provides a gear shifting device 100, the basic structure and principle thereof and the technical effects thereof are the same as those of the first embodiment, and for the sake of brief description, the corresponding contents of the first embodiment can be referred to where the embodiment is not mentioned.

The speed change gear shifting device 100 comprises an input through shaft 110, an output through shaft 130, a plurality of first transmission assemblies 150 and a plurality of second transmission assemblies 170, wherein the first transmission assemblies 150 are used for transmitting power between the input through shaft 110 and the output through shaft 130, each first transmission assembly 150 comprises a first transmission piece 151 and a second transmission piece 153 which are in transmission connection with each other, the plurality of first transmission pieces 151 are installed on the input through shaft 110 at intervals, and the plurality of second transmission pieces 153 are installed on the output through shaft 130 at intervals. The second transmission assemblies 170 are also used for transmitting power between the input through shaft 110 and the output through shaft 130, each second transmission assembly 170 includes a third transmission member 171, a fourth transmission member 173 and a steering transmission member 175, the plurality of third transmission members 171 are installed on the input through shaft 110 at intervals, the plurality of fourth transmission members 173 are installed on the output through shaft 130 at intervals, and each steering transmission member 175 is in transmission connection with the corresponding third transmission member 171 and the corresponding fourth transmission member 173.

The first transmission assembly 150 and the second transmission assembly 170 are equal in number, so that the forward rotation and the reverse rotation are equal in number. Of course, the number of the first transmission assembly 150 and the second transmission assembly 170 may be different, so that the number of forward and reverse gears is different, and the transmission is suitable for different situations.

Specifically, the third transmission member 171, the fourth transmission member 173 and the turning transmission member 175 are gears, and the turning transmission member 175 is engaged with the corresponding third transmission member 171 and the fourth transmission member 173 to form a third gear set, so that the rotation directions of the third transmission member 171 and the fourth transmission member 173 are the same, and the transmission ratios of the third gear sets are different.

In the present embodiment, a third clutch 177 is disposed between the third transmission member 171 and the input through shaft 110, so that the third transmission member 171 and the input through shaft 110 are connected through the third clutch 177; the fourth transmission member 173 is fixedly sleeved on the output through shaft 130, so that the fourth transmission member 173 and the output through shaft 130 can rotate synchronously.

In the speed change gear shifting device 100 provided by the embodiment, the first transmission assembly 150 realizes the reverse rotation of the input through shaft 110 and the output through shaft 130, and the second transmission assembly 170 realizes the same-direction rotation of the input through shaft 110 and the output through shaft 130. In actual operation, one of the plurality of first clutches 155 and the plurality of third clutches 177 is selected to be meshed, so that the same-direction output or the reverse-direction output can be selected according to actual requirements, and the clutch is very convenient.

Referring to fig. 10, in another preferred embodiment of the present invention, the first transmission member 151 is fixedly sleeved on the extending through shaft, and a second clutch 157 is disposed between the second transmission member 153 and the output through shaft 130, so that the second transmission member 153 and the output through shaft 130 are connected through the second clutch 157. Meanwhile, the third transmission member 171 is fixedly secured to the input through shaft 110, and a fourth clutch 179 is disposed between the fourth transmission member 173 and the output through shaft 130, so that the fourth transmission member 173 and the output through shaft 130 are connected through the fourth clutch 179.

In other preferred embodiments of the present invention, a first clutch 155 may be disposed between the first transmission member 151 and the input through shaft 110, so that the first transmission member 151 and the input through shaft 110 are connected through the first clutch 155; the second transmission member 153 is fixedly sleeved on the output through shaft 130, so that the second transmission member 153 and the output through shaft 130 can rotate synchronously, or a second clutch 157 is arranged between the second transmission member 153 and the output through shaft, so that the second transmission member 153 and the output through shaft 130 are connected through the second clutch 157. Meanwhile, the third transmission member 171 is fixedly sleeved on the input through shaft 110, or a third clutch 177 is disposed between the third transmission member 171 and the input through shaft 110 so that the third transmission member 171 is connected with the input through shaft 110 through the third clutch 177, and a fourth clutch 179 is disposed between the fourth transmission member 173 and the output through shaft 130 so that the fourth transmission member 173 is connected with the output through shaft 130 through the fourth clutch 179.

In other preferred embodiments of the present invention, a first clutch 155 may be disposed between the first transmission member 151 and the input through shaft 110, so that the first transmission member 151 and the input through shaft 110 are connected through the first clutch 155; the second transmission member 153 is fixedly sleeved on the output through shaft 130, so that the second transmission member 153 and the output through shaft 130 can rotate synchronously. A third clutch 177 is arranged between the third transmission member 171 and the input through-shaft 110, so that the third transmission member 171 is connected to the input through-shaft 110 via the third clutch 177, and a fourth clutch 179 is arranged between the fourth transmission member 173 and the output through-shaft 130, so that the fourth transmission member 173 is connected to the output through-shaft 130 via the fourth clutch 179.

In other preferred embodiments of the present invention, the first transmission member 151 may be fixedly sleeved on the extending through shaft, and a second clutch 157 is disposed between the second transmission member 153 and the output through shaft 130, so that the second transmission member 153 and the output through shaft 130 are connected through the second clutch 157. Meanwhile, a third clutch 177 is arranged between the third transmission member 171 and the input through shaft 110, so that the third transmission member 171 is connected with the input through shaft 110 through the third clutch 177; the fourth transmission member 173 is fixedly sleeved on the output through shaft 130, so that the fourth transmission member 173 and the output through shaft 130 can rotate synchronously.

In other preferred embodiments of the present invention, the first transmission member 151 may be fixedly sleeved on the extending through shaft, and a second clutch 157 is disposed between the second transmission member 153 and the output through shaft 130, so that the second transmission member 153 and the output through shaft 130 are connected through the second clutch 157. A third clutch 177 is arranged between the third transmission member 171 and the input through-shaft 110, so that the third transmission member 171 is connected to the input through-shaft 110 via the third clutch 177, and a fourth clutch 179 is arranged between the fourth transmission member 173 and the output through-shaft 130, so that the fourth transmission member 173 is connected to the output through-shaft 130 via the fourth clutch 179.

In other preferred embodiments of the present invention, a first clutch 155 may be disposed between the first transmission member 151 and the input through shaft 110, so that the first transmission member 151 and the input through shaft 110 are connected through the first clutch 155, and a second clutch 157 is disposed between the second transmission member 153 and the output through shaft 130, so that the second transmission member 153 and the output through shaft 130 are connected through the second clutch 157. A third clutch 177 is arranged between the third transmission member 171 and the input through-shaft 110, so that the third transmission member 171 is connected to the input through-shaft 110 via the third clutch 177, and a fourth clutch 179 is arranged between the fourth transmission member 173 and the output through-shaft 130, so that the fourth transmission member 173 is connected to the output through-shaft 130 via the fourth clutch 179.

In other preferred embodiments of the present invention, a first clutch 155 may be disposed between the first transmission member 151 and the input through shaft 110, so that the first transmission member 151 and the input through shaft 110 are connected through the first clutch 155, and a second clutch 157 is disposed between the second transmission member 153 and the output through shaft 130, so that the second transmission member 153 and the output through shaft 130 are connected through the second clutch 157. Meanwhile, a third clutch 177 is arranged between the third transmission member 171 and the input through shaft 110, so that the third transmission member 171 is connected with the input through shaft 110 through the third clutch 177; the fourth transmission member 173 is fixedly sleeved on the output through shaft 130, so that the fourth transmission member 173 and the output through shaft 130 can rotate synchronously.

In other preferred embodiments of the present invention, a first clutch 155 may be disposed between the first transmission member 151 and the input through shaft 110, so that the first transmission member 151 and the input through shaft 110 are connected through the first clutch 155, and a second clutch 157 is disposed between the second transmission member 153 and the output through shaft 130, so that the second transmission member 153 and the output through shaft 130 are connected through the second clutch 157. Meanwhile, the third transmission member 171 is fixedly secured to the input through shaft 110, and a fourth clutch 179 is disposed between the fourth transmission member 173 and the output through shaft 130, so that the fourth transmission member 173 and the output through shaft 130 are connected through the fourth clutch 179.

Of course, the above description is only an example of the present invention, and any technical solutions formed by combination and variation are within the scope of the present invention.

Tenth embodiment

Referring to fig. 11, the present embodiment provides a transmission case 10 including a reversing device 200 and a gearshift 100, wherein the basic structure and principle of the gearshift 100 and the technical effects thereof are the same as those of the first embodiment, and for the sake of brief description, reference may be made to the corresponding contents of the first embodiment where the embodiment is not mentioned in part.

The speed change gear shifting device 100 comprises an input through shaft 110, an output through shaft 130 and a plurality of first transmission assemblies 150, wherein the first transmission assemblies 150 are used for transmitting power between the input through shaft 110 and the output through shaft 130, each first transmission assembly 150 comprises a first transmission piece 151 and a second transmission piece 153 which are in transmission connection with each other, the plurality of first transmission pieces 151 are installed on the input through shaft 110 at intervals, and the plurality of second transmission pieces 153 are installed on the output through shaft 130 at intervals; a first clutch 155 is arranged between the first transmission member 151 and the input through shaft 110, so that the first transmission member 151 and the input through shaft 110 are connected through the first clutch 155; and/or a second clutch 157 is arranged between the second transmission member 153 and the output through shaft 130, so that the second transmission member 153 and the output through shaft 130 are connected through the second clutch 157.

The first transmission member 151 and the second transmission member 153 may be arranged in the following manner:

1. a first clutch 155 is arranged between the first transmission member 151 and the input through shaft 110, so that the first transmission member 151 and the input through shaft 110 are connected through the first clutch 155, and the second transmission member 153 is fixedly sleeved on the output through shaft 130.

2. A first clutch 155 is arranged between the first transmission member 151 and the input through shaft 110, so that the first transmission member 151 and the input through shaft 110 are connected through the first clutch 155, and a second clutch 157 is arranged between the second transmission member 153 and the output through shaft 130, so that the second transmission member 153 and the output through shaft 130 are connected through the second clutch 157.

3. The first transmission member 151 is fixedly sleeved on the input through shaft 110, and a second clutch 157 is arranged between the second transmission member 153 and the output through shaft 130, so that the second transmission member 153 and the output through shaft 130 are connected through the second clutch 157.

Preferably, the present embodiment adopts a third mode, that is, the first transmission member 151 is fixedly sleeved on the input through shaft 110, and a second clutch 157 is arranged between the second transmission member 153 and the output through shaft 130, so that the second transmission member 153 and the output through shaft 130 are connected through the second clutch 157.

It should be noted that the gear shift device 100 in the present embodiment may be the gear shift device 100 in the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment, the sixth embodiment, the seventh embodiment, the eighth embodiment and the ninth embodiment, and the combination structure thereof is not described herein.

The reversing device 200 comprises a reversing output shaft 210, a first reversing transmission set 230, a second reversing transmission set 250, a first reversing clutch 270 and a second reversing clutch 290; the first reversing transmission group 230 is in transmission connection with the output through shaft 130 and is connected with the reversing output shaft 210 through a first reversing clutch 270, and the first reversing transmission group 230 is used for enabling the rotation direction of the reversing output shaft 210 to be the same as the rotation direction of the output through shaft 130; the second reversing transmission set 250 is in transmission connection with the output through shaft 130 and is connected with the reversing output shaft 210 through a second reversing clutch 290, and the second reversing transmission set 250 is used for enabling the rotation direction of the reversing output shaft 210 to be opposite to the rotation direction of the output through shaft 130.

First reversing transmission set 230 includes first reversing transmission member 231, second reversing transmission member 233 and transition reversing transmission member 235, first reversing transmission member 231 is installed on output through shaft 130, second reversing transmission member 233 is connected with reversing output shaft 210 through first reversing clutch 270, transition reversing transmission member 235 is respectively connected with first reversing transmission member 231 and second reversing transmission member 233 in a transmission manner, so that first reversing transmission member 231 and second reversing transmission member 233 rotate in the same direction.

In this embodiment, there are two reversing output shafts 210, first reversing clutch 270, second reversing drive member 233, and transitional reversing drive members 235, and the two transitional reversing drive members 235 are respectively drivingly connected to first reversing drive member 231 from both sides, so that power is transmitted simultaneously to the two transitional reversing drive members 235 through first reversing drive member 231. The two second reversing transmission members 233 are respectively in transmission connection with the two transitional reversing transmission members 235 and respectively mounted on the two reversing output shafts 210, and the power transmission between the second reversing transmission members 233 and the reversing output shafts 210 is controlled independently of each other by the two first reversing clutches 270.

Second reversing power train 250 includes a third reversing power member 251 mounted on output shaft 130 and a fourth reversing power member 253, fourth reversing power member 253 connected to reversing output shaft 210 by a second reversing clutch 290, third reversing power member 251 and fourth reversing power member 253 rotating in opposite directions.

In this embodiment, first reversing drive member 231, second reversing drive member 233 and transitional reversing drive member 235 are all gears and form a first reversing gear set, while third reversing drive member 251 and fourth reversing drive member 253 are also gears and form a second reversing gear set.

Further, the gear box 10 further includes a speed reducer 280, and the speed reducer 280 is in transmission connection with the input through shaft 110.

The first embodiment provides a transmission shifting device 100 which is combined with an electromagnetic clutch dual-output based reversing device 200 to realize a single-input/dual-output gearbox. The gearbox mainly comprises two parts, namely a speed change device and a single-input/double-output reversing device 200, wherein the speed change device mainly realizes speed change, the double-input/double-output reversing device is equivalent to a transfer device, double outputs are realized, independent reversing control of double shafts is realized, and the gearbox is particularly suitable for flexible maneuvering control of a double-wheel driven vehicle. In addition to the two main devices of speed change and reversing, in practical application, because the output speed of the engine or the motor is too high or too low, a speed reducer 280 is often installed at the front end of the input whole speed change and reversing device 200, and the speed is firstly adjusted to a proper range.

Eleventh embodiment

Referring to fig. 12, the present embodiment provides a mobile platform 1, which comprises a driving member 300, a driving wheel 400 and a transmission case 10, wherein the basic structure and principle of the transmission case 10 and the technical effects thereof are the same as those of the tenth embodiment, and for the sake of brief description, the corresponding contents of the tenth embodiment can be referred to where not mentioned in part.

The speed change gear shifting device 100 comprises an input through shaft 110, an output through shaft 130 and a plurality of first transmission assemblies 150, wherein the first transmission assemblies 150 are used for transmitting power between the input through shaft 110 and the output through shaft 130, each first transmission assembly 150 comprises a first transmission piece 151 and a second transmission piece 153 which are in transmission connection with each other, the plurality of first transmission pieces 151 are installed on the input through shaft 110 at intervals, and the plurality of second transmission pieces 153 are installed on the output through shaft 130 at intervals; a first clutch 155 is arranged between the first transmission member 151 and the input through shaft 110, so that the first transmission member 151 and the input through shaft 110 are connected through the first clutch 155; and/or a second clutch 157 is arranged between the second transmission member 153 and the output through shaft 130, so that the second transmission member 153 and the output through shaft 130 are connected through the second clutch 157. The driving member 300 is in driving connection with the input through shaft 110, and the driving wheel 400 is in driving connection with the reversing output shaft 210.

In this embodiment, an engine (oil-driven engine or motor) is installed at the front input end of the speed-changing transmission case 10 and connected to the reducer 280, and a driving wheel 400 is installed at the rear output end of the speed-changing transmission case 10 and connected to the reversing output shaft 210, so as to realize a relatively complete set of driving/transmission system of the mobile platform 1. If the reversing output shaft 210 is externally connected with wheels, the wheeled mobile platform 1 is formed, and if the reversing output shaft is externally connected with tracks, the crawler-type mobile platform 1 is formed. In practical applications, in addition to driving the vehicle to travel, a power take-off 500(PTO) is often drawn at the engine output end as needed to initiate the drive of the work module.

Compared with a traditional automobile/tractor transmission for manual speed change, the automatic speed change can be conveniently realized by adopting the electromagnetic clutch in the embodiment. Secondly, compared with the single input (from an engine) and the single output (to a rear axle differential) of the automobile, the speed of the left and the right wheels can not be independently controlled, the turning radius is larger, the maneuverability and the flexibility are limited, the double-output driving wheel 400 of the embodiment can be independently controlled, the turning radius can be zero at the minimum, and the maneuverability and the flexibility are strong.

Compared with the traditional engineering vehicle, the hydraulic speed change of the engineering vehicle has the defects of complex structure, low transmission efficiency, high production and manufacturing cost, high maintenance cost and the like, and the hydraulic speed change device is simpler in structure, higher in transmission efficiency, and low in manufacturing cost and maintenance cost.

Compared with other mobile platforms 1 based on electromagnetic clutches, the embodiment adopts through shaft connection, the installation mode is simpler and more convenient, the modularized combination installation is convenient, and the failure rate is reduced. Secondly, because the through shaft connection is adopted, the movement extension and the extension are realized, the speed change and reversing combination is realized on the basis, and the whole speed change transmission system is more concise and easy to realize and practical.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A speed-changing and gear-shifting device is characterized by comprising an input through shaft, an output through shaft and a plurality of first transmission assemblies, wherein the first transmission assemblies are used for transmitting power between the input through shaft and the output through shaft and have different transmission ratios;

a first clutch is arranged between the first transmission piece and the input through shaft, so that the first transmission piece is connected with the input through shaft through the first clutch; and/or a second clutch is arranged between the second transmission piece and the output through shaft, so that the second transmission piece and the output through shaft are connected through the second clutch.

2. The variable speed shifting apparatus of claim 1, wherein the first transmission member and the second transmission member are both gears, and the first transmission member and the second transmission member mesh with each other and form a first gear set such that the first transmission member and the second transmission member rotate in opposite directions and the first gear set has different gear ratios.

3. A variable-speed gear shift device according to claim 1, wherein a transition transmission member is provided between the first transmission member and the corresponding second transmission member, the transition transmission member being in driving connection with the first transmission member and the corresponding second transmission member, respectively.

4. The gearshift device according to claim 3, wherein the first transmission member, the second transmission member and the transition transmission member are gears, and the transition transmission members are engaged with the corresponding first transmission member and the corresponding second transmission member to form a second gear set, respectively, such that the first transmission member and the second transmission member rotate in the same direction and the gear ratios of the second gear set are different.

5. The variable speed shifting apparatus of claim 1, further comprising a plurality of second transmission assemblies for transmitting power between the input through shaft and the output through shaft at different transmission ratios, each of the second transmission assemblies comprising a third transmission member, a fourth transmission member and a steering transmission member, wherein the third transmission members are mounted on the input through shaft at intervals, the fourth transmission members are mounted on the output through shaft at intervals, and each of the steering transmission members is in transmission connection with the corresponding third transmission member and the corresponding fourth transmission member;

a third clutch is arranged between the third transmission piece and the input through shaft, so that the third transmission piece is connected with the input through shaft through the third clutch; and/or a fourth clutch is arranged between the fourth transmission piece and the output through shaft, so that the fourth transmission piece and the output through shaft are connected through the fourth clutch.

6. The variable speed shifting apparatus of claim 5, wherein the third transmission member, the fourth transmission member, and the steering transmission members are gears, and the steering transmission members are engaged with the corresponding third transmission member and fourth transmission member to form a third gear set, such that the third transmission member and the fourth transmission member rotate in the same direction and the third gear set has different gear ratios.

7. A transmission case comprising a reversing device and a speed-changing gear-shifting device as claimed in any one of claims 1 to 6, the reversing device comprising a reversing output shaft, a first reversing transmission set, a second reversing transmission set, a first reversing clutch and a second reversing clutch;

the first reversing transmission group is in transmission connection with the output through shaft and is connected with the reversing output shaft through the first reversing clutch, and the first reversing transmission group is used for enabling the rotation direction of the reversing output shaft to be the same as that of the output through shaft;

the second reversing transmission group is in transmission connection with the output through shaft and is connected with the reversing output shaft through the second reversing clutch, and the second reversing transmission group is used for enabling the rotation direction of the reversing output shaft to be opposite to that of the output through shaft.

8. The variable speed drive box of claim 7, wherein the first reversing drive set comprises a first reversing drive member, a second reversing drive member, and a transitional reversing drive member, the first reversing drive member being mounted on the output through shaft, the second reversing drive member being connected to the reversing output shaft through the first reversing clutch, the transitional reversing drive members being drivingly connected to the first reversing drive member and the second reversing drive member, respectively, such that the first reversing drive member and the second reversing drive member rotate in the same direction; the second reversing transmission set comprises a third reversing transmission piece and a fourth reversing transmission piece, the third reversing transmission piece is installed on the output through shaft, the fourth reversing transmission piece is connected with the reversing output shaft through the second reversing clutch, and the third reversing transmission piece and the fourth reversing transmission piece are opposite in rotating direction.

9. The gear box of claim 7, further comprising a speed reducer in driving connection with the input through shaft.

10. A mobile platform comprising a drive member drivingly connected to the input through-shaft, a drive wheel drivingly connected to the reverse output shaft, and a variable speed drive according to any of claims 7 to 9.