Concentric wheel set and application thereof

Abstract

The invention discloses application of a concentric wheel set in the aspects of labor saving and speed increasing, theoretically speaking, under the condition that the material strength and the counter-acting force can be met, a mechanical device can subversively meet the requirements of people for force and speed; the concentric wheel set comprises a first end concentric wheel and a second end concentric wheel, wherein the first end concentric wheel comprises a small wheel and a large wheel which are coaxially arranged; the at least one middle concentric wheel comprises a small wheel and a large wheel which are coaxially arranged, and the small wheel of the middle concentric wheel is in transmission connection with the large wheel of the first end part concentric wheel at the same linear speed; and the second end part concentric wheel comprises a small wheel and a large wheel which are coaxially arranged, and the small wheel of the second end part concentric wheel is in transmission connection with the large wheel of the central concentric wheel in a manner of the same phase speed. The device has the beneficial effects that by changing the input and output directions, the labor-saving effect and the speed-increasing effect can be achieved, and different use requirements can be met.

Description

Technical Field

[0001] The invention relates to the technical field of force transmission, and in particular to the application of concentric wheel sets. Background Art

[0002] The labor-saving transmission structure is a common mechanical transmission structure. The most common and most labor-saving one is the pulley group structure. At present, the lifting of super-heavy large objects is achieved by pulley groups, such as gantry cranes. However, the labor-saving effect is still limited and cannot meet the requirements. The current labor-saving transmission structure has a limited application scope and cannot meet different application scenarios. At the same time, the current labor-saving transmission structure can only perform labor-saving transmission, and cannot achieve speed-up transmission, and its application scope is limited. Summary of the invention

[0003] The purpose of the present invention is to provide a concentric wheel set and its application in order to solve the above problems, as described in detail below.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] The concentric wheel set provided by the present invention refers to a concentric wheel and its combination. The concentric wheel here refers to a conjoined wheel made of two wheels with different radii and concentric centers. A combination of two or more concentric wheels installed with bearings and staggered in a certain space according to requirements, and connected with a chain or belt in sequence (without slipping) to perform transmission is called a concentric wheel set, which specifically includes:

[0006] A first end concentric wheel, wherein the first end concentric wheel comprises a coaxially arranged small wheel and a large wheel;

[0007] At least one intermediate concentric wheel, the intermediate concentric wheel comprising a coaxially arranged small wheel and a large wheel, the small wheel of the intermediate concentric wheel being transmission-connected to the large wheel of the first end concentric wheel at the same linear speed;

[0008] The second end concentric wheel comprises a coaxially arranged small wheel and a large wheel, and the small wheel of the second end concentric wheel is transmission-connected with the large wheel of the central concentric wheel in the same phase speed.

[0009] Optionally, the intermediate concentric wheels include a first intermediate concentric wheel and a second intermediate concentric wheel;

[0010] The small wheel of the first intermediate concentric wheel is drivingly connected to the large wheel of the first end concentric wheel at the same linear speed;

[0011] The small wheel of the second intermediate concentric wheel is transmission-connected with the large wheel of the first intermediate concentric wheel at the same linear speed.

[0012] Optionally, the radius ratio of the large wheel and the small wheel of the first end concentric wheel, the radius ratio of the large wheel and the small wheel of the middle concentric wheel, and the radius ratio of the large wheel and the small wheel of the second end concentric wheel are all 2:1, and the radius of the large wheel of the first end concentric wheel, the large wheel of the middle concentric wheel, and the large wheel of the second end concentric wheel are the same.

[0013] Optionally, the first end concentric wheel, the middle concentric wheel and the second end concentric wheel are all sprockets, the small wheel of the middle concentric wheel and the large wheel of the first end concentric wheel are driven by a chain, and the small wheel of the second end concentric wheel and the large wheel of the center concentric wheel are driven by a chain.

[0014] Optionally, the first end concentric wheel, the middle concentric wheel and the second end concentric wheel are all synchronous pulleys, the small wheel of the middle concentric wheel and the large wheel of the first end concentric wheel are driven by a synchronous belt, and the small wheel of the second end concentric wheel and the large wheel of the center concentric wheel are driven by a synchronous belt.

[0015] The present invention also provides a lifting structure, comprising:

[0016] Crane frame;

[0017] Any of the above-mentioned concentric wheel groups, wherein the concentric wheel group is arranged on the lifting frame;

[0018] A winding roller connected to the first end concentric wheel, wherein the winding roller and the first end concentric wheel are coaxially arranged;

[0019] A lifting wire, the lifting wire is wound around the outside of the winding roller, and a hook is provided at the movable end of the lifting wire;

[0020] Lifting ropes used to tie up lifting objects;

[0021] A handle is connected to the outer circumferential surface of the large wheel of the concentric wheel at the second end.

[0022] The present invention also provides a transport device, comprising:

[0023] transport locomotive;

[0024] Any of the above-mentioned concentric wheel sets, wherein the concentric wheel set is arranged on the transport locomotive;

[0025] The small wheel of the concentric wheel at the first end is drivingly connected to the input end of the transmission system of the transport locomotive in a manner with the same linear speed;

[0026] The large wheel of the second end concentric wheel is drivingly connected to the output end of the engine of the transport locomotive in a manner of the same linear speed.

[0027] The present invention also provides a vehicle speed-increasing device, characterized in that it comprises:

[0028] Any of the above-mentioned concentric wheel sets, wherein the concentric wheel set is arranged on a vehicle;

[0029] The small wheel of the concentric wheel at the first end is drivingly connected to the output end of the engine of the vehicle in a manner of the same linear speed;

[0030] The large wheel of the second end concentric wheel is drivingly connected to the input end of the driving output device of the vehicle in a manner of the same linear speed.

[0031] The present invention also provides a high-speed rail speed-up device, comprising:

[0032] Any of the above-mentioned concentric wheel groups, wherein the concentric wheel group is arranged on a high-speed train;

[0033] The small wheel of the concentric wheel at the first end is connected to the output end of the traction motor of the high-speed train in a transmission manner with the same linear speed;

[0034] The large wheel of the second end concentric wheel is transmission-connected to the input end of the gearbox of the high-speed train in a manner with the same linear speed.

[0035] A speed-up device for launching aircraft from an aircraft carrier, comprising: any of the above-mentioned concentric wheel groups, wherein the small wheel of the first end concentric wheel is connected to the output end of the modified engine in a transmission manner with the same linear speed;

[0036] The large wheel of the concentric wheel at the second end is connected to the input end of the transmission belt modified on the aircraft carrier in a transmission manner with the same linear speed.

[0037] The beneficial effects are: by using the small wheel of the concentric wheel at the first end as the output and the large wheel of the concentric wheel at the second end as the input, it is possible to achieve a labor-saving effect with good labor-saving effect, and achieve the effect of driving a large object with a small force; by using the large wheel of the concentric wheel at the second end as the output and the small wheel of the concentric wheel at the first end as the input, it is possible to achieve a speed-up effect; it can be applied in different environments and has a wide range of applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 It is a schematic diagram of the structure of the present invention;

[0040] Figure 2 is a force analysis schematic diagram of the present invention;

[0041] Figure 3 It is a schematic diagram of linear velocity analysis of the present invention.

[0042] The following are the descriptions of the reference numerals:

[0043] 1. First end concentric wheel; 21. First middle concentric wheel; 22. Second middle concentric wheel; 3. Second end concentric wheel. DETAILED DESCRIPTION

[0044] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0045] Embodiment 1

[0046] See also Figure 1-Figure 2 As shown, an embodiment of the present invention proposes a concentric wheel set, comprising:

[0047] The first end concentric wheel 1 comprises a coaxially arranged small wheel and a large wheel;

[0048] At least one intermediate concentric wheel, the intermediate concentric wheel comprising a coaxially arranged small wheel and a large wheel, the small wheel of the intermediate concentric wheel being transmission-connected with the large wheel of the first end concentric wheel 1 at the same linear speed;

[0049] The second end concentric wheel 3 comprises a coaxially arranged small wheel and a large wheel, and the small wheel of the second end concentric wheel 3 is transmission-connected with the large wheel of the central concentric wheel at the same phase speed;

[0050] Further, the intermediate concentric wheels include a first intermediate concentric wheel 21 and a second intermediate concentric wheel 22;

[0051] The small wheel of the first intermediate concentric wheel 21 is connected to the large wheel of the first end concentric wheel 1 in a transmission manner with the same linear speed;

[0052] The small wheel of the second intermediate concentric wheel 22 is connected to the large wheel of the first intermediate concentric wheel 21 in a transmission manner with the same linear speed;

[0053] Furthermore, the radius ratio of the large wheel and the small wheel of the first end concentric wheel 1, the radius ratio of the large wheel and the small wheel of the middle concentric wheel, and the radius ratio of the large wheel and the small wheel of the second end concentric wheel 3 are all 2:1, and the radius of the large wheel of the first end concentric wheel 1, the large wheel of the middle concentric wheel, and the large wheel of the second end concentric wheel 3 are the same;

[0054] Furthermore, the first end concentric wheel 1, the middle concentric wheel and the second end concentric wheel 3 are all sprockets, the small wheel of the middle concentric wheel and the large wheel of the first end concentric wheel 1 are driven by a chain, and the small wheel of the second end concentric wheel 3 and the large wheel of the center concentric wheel are driven by a chain.

[0055] In this embodiment, the large wheel of the second end concentric wheel 3 is used as input, and the small wheel of the first end concentric wheel 1 is used as output. Figure 2 As shown, assuming that the radius of the small wheel is r, the radius of the large wheel is R, R:r = 2:1; a weight is suspended on the outer circle of the small wheel of the first end concentric wheel 1, and the gravity of the weight is G. According to the wheel axle formula, the product of the force borne by the small wheel and the radius of the small wheel is equal to the product of the force applied by the large wheel and the radius of the large wheel, that is, Gr = F1R, Then, F1r=F2R, F3R=F2r, F4R=F 3r , In this embodiment, R:r=2:1. If the radius ratio of the large wheel to the small wheel increases, the labor-saving effect is improved; if the number of the intermediate concentric wheels is increased, the labor-saving effect is also improved; therefore, it can be concluded that the labor-saving of the structure of the present invention is multiplicatively increased. Although the above calculation does not take into account the friction force in the transmission process, it can also be concluded that the labor-saving effect of the present invention is better than the current labor-saving transmission structure; if F4 is used as the traction force, it can pull a heavy object of G=16F4. From the above content, it can be deduced that G=F 输入 (R / r) n , where n is the total number of concentric wheels. Therefore, the present invention uses the small wheel of the concentric wheel 1 at the first end as the output and the large wheel of the concentric wheel 3 at the second end as the input, which can achieve a labor-saving effect, a good labor-saving effect, and achieve the effect of driving a large object with a small force;

[0056] Theoretically, the mass of the earth is 5.98×1024 kg. If 24 concentric wheels with a radius of 1:10 are used, and the material (which can bear the weight of the object) and the reaction force are satisfied, theoretically, a force of 5.98 kg can lift an object equivalent to the mass of the earth.

[0057] like Figure 3As shown, the small wheel of the concentric wheel 1 at the first end is used as the power input, and the large wheel of the concentric wheel 3 at the second end is used as the output. Assume that the radius of the small wheel is r, and the radius of the large wheel is R, R:r=2:1; the linear velocity of the small wheel of the concentric wheel 1 at the first end is V0, and the linear velocity of the large wheel of the concentric wheel 1 at the first end is V1. Since the angular velocities of the small wheel and the large wheel of the concentric wheel 1 at the first end are the same, V1=2πR, V0=2πr, therefore V1=2V0; from the above process, it can be deduced that V2=2V1, V3=2V2, V4=2V3=16V0, that is, the linear velocity of the large wheel of the concentric wheel 3 at the second end is 16 times that of the small wheel of the concentric wheel 1 at the first end. From the above process, it can be deduced that V 输出 =V 输入 (R / r) n , where n is the total number of concentric wheels. By adjusting the radius ratio of the large wheel and the small wheel and the total number of concentric wheels, the speed-up effect can be adjusted. Therefore, the present invention uses the small wheel of the concentric wheel 1 at the first end as the power input and the large wheel of the concentric wheel 3 at the second end as the output to achieve the speed-up effect.

[0058] The concentric wheel assembly based on the concentric wheels of the present invention is a mechanical device that saves effort when used in the forward direction and increases speed when used in the reverse direction. Any device used for lifting and driving objects, as well as for increasing the speed of moving objects, falls within the protection scope of the present invention.

[0059] Embodiment 2

[0060] The difference between the second embodiment and the first embodiment is as follows:

[0061] The first end concentric wheel 1, the middle concentric wheel and the second end concentric wheel 3 are all synchronous pulleys. The small wheel of the middle concentric wheel and the large wheel of the first end concentric wheel 1 are driven by a synchronous belt, and the small wheel of the second end concentric wheel 3 and the large wheel of the center concentric wheel are driven by a synchronous belt.

[0062] An embodiment of the present invention further provides a lifting structure, comprising:

[0063] Crane frame;

[0064] Any of the above concentric wheel sets, the concentric wheel set being arranged on a crane frame;

[0065] A winding roller connected to the first end concentric wheel 1, the winding roller and the first end concentric wheel 1 are coaxially arranged;

[0066] A lifting wire, the lifting wire is wound around the outside of the winding roller, and a hook is provided at the movable end of the lifting wire;

[0067] Lifting ropes used to tie up lifting objects;

[0068] A handle connected to the outer circumferential surface of the large wheel of the concentric wheel 3 at the second end.

[0069] In this embodiment, if Figure 2 As shown, assuming that the radius of the small wheel is r, the radius of the large wheel is R, R:r = 2:1; a weight is suspended on the outer circle of the small wheel of the first end concentric wheel 1, and the gravity of the weight is G. According to the wheel axle formula, the product of the force borne by the small wheel and the radius of the small wheel is equal to the product of the force applied by the large wheel and the radius of the large wheel, that is, Gr = F1R, Then, F1r=F2R, F3R=F2r, F4R=F 3r , In this embodiment, R:r=2:1. If the radius ratio of the large wheel to the small wheel increases, the labor-saving effect is improved; if the number of intermediate concentric wheels is increased, the labor-saving effect is also improved; therefore, by utilizing the lifting structure of the present invention, heavy objects can be pulled and lifted with less force, and the lifting effect is better than that of existing lifting equipment.

[0070] An embodiment of the present invention further provides a transport device, comprising:

[0071] transport locomotive;

[0072] Any of the above concentric wheel sets, the concentric wheel set being arranged on a transport locomotive;

[0073] The small wheel of the first end concentric wheel 1 is drivingly connected to the input end of the transmission system of the transport locomotive in a manner with the same linear speed;

[0074] The large wheel of the second end concentric wheel 3 is transmission-connected with the output end of the engine of the transport locomotive in a manner with the same linear speed.

[0075] In this embodiment, if Figure 2 As shown in the figure, if F4 is used as the traction force, it can pull a heavy object with G = 16F4. From the above content, it can be deduced that G = F n (R / r) n , where n is the total number of concentric wheels; therefore, the transport equipment of the present invention can transport heavy objects with small power input.

[0076] An embodiment of the present invention further provides a vehicle speed-increasing device, which is characterized by comprising:

[0077] Any of the above concentric wheel sets, the concentric wheel set being arranged on a vehicle;

[0078] The small wheel of the first end concentric wheel 1 is drivingly connected to the output end of the engine of the vehicle in a manner with the same linear speed;

[0079] The large wheel of the concentric wheel 3 at the second end is transmission-connected with the input end of the driving output device of the vehicle in a manner with the same linear speed.

[0080] In this embodiment, the angular velocity ratio is: when the large wheel and the small wheel of the first end concentric wheel 1 rotate one circle, the large wheel and the small wheel of the first intermediate concentric wheel 21 rotate two circles, the large wheel and the small wheel of the second center concentric wheel 22 rotate four circles, and the large wheel and the small wheel of the second end concentric wheel 3 rotate eight circles, so the angular velocity ratio of each concentric wheel in the concentric wheel group is 1:2:4:8;

[0081] Linear velocity ratio: The linear velocity here refers to the outer edge linear velocity of the large wheel and the small wheel. During the rotation of the concentric wheel group, assuming that the linear velocity of the small wheel of the concentric wheel 1 at the first end is V, the linear velocity of the large wheel of the concentric wheel 1 at the first end is 2V, and the linear velocity of the small wheel of the first intermediate concentric wheel 21 is equal to the linear velocity of the large wheel of the concentric wheel 1 at the first end, which is also 2V. Then the linear velocity of the large wheel of the first intermediate concentric wheel 21 is 4V; it can be deduced that the linear velocity of the small wheel of the second intermediate concentric wheel 22 is 4V, and the linear velocity of the large wheel is 8V; the linear velocity of the small wheel of the concentric wheel 3 at the second end is 8V, and the linear velocity of the large wheel is 16V; so the linear velocity ratio between the concentric wheels of the concentric wheel group during movement is: V0:V1:V2:V3:V4 =1:2:4:8:16; wherein, V0 represents the linear velocity of the small wheel of the first end concentric wheel 1, V1 represents the linear velocity of the large wheel of the first end concentric wheel 1, V2 represents the linear velocity of the large wheel of the first intermediate concentric wheel 21, V3 represents the linear velocity of the large wheel of the second intermediate concentric wheel 22, and V4 represents the linear velocity of the large wheel of the second end concentric wheel 3; when the concentric wheel group is in motion, the linear velocity of the small wheel of the first intermediate concentric wheel 21 is equal to the linear velocity of the large wheel of the first end concentric wheel 1; the linear velocity of the small wheel of the second intermediate concentric wheel 22 is equal to the linear velocity of the large wheel of the first intermediate concentric wheel 21; the linear velocity of the small wheel of the second end concentric wheel 3 is equal to the linear velocity of the large wheel of the second intermediate concentric wheel 22;

[0082] Time ratio: from the operation to the stop of the concentric wheel group, the time taken by each concentric wheel is always equal, t1:t2:t3:t4:t5=1:1:1:1:1; above t1 represents the time taken by the small wheel of the first end concentric wheel 1, t2 represents the time taken by the large wheel of the first end concentric wheel 1, t3 represents the time taken by the large wheel of the first intermediate concentric wheel 21, t4 represents the time taken by the large wheel of the second intermediate concentric wheel 22, and t5 represents the time taken by the large wheel of the second end concentric wheel 3;

[0083] Distance ratio: The distance ratio here refers to the distance ratio of the outer circle rotation movement of the concentric wheel and the small wheel in the same time during the movement. Since the distance is the product of speed and time, S = Vt, and since t is a constant, the distance ratio of the concentric wheel group in the same time during the movement is:

[0084] S1:S2:S3:S4:S5=1:2:4:8:16

[0085] In the above, S1 represents the distance moved by the outer circle of the small wheel of the first end concentric wheel 1 in the same time; S2 represents the distance moved by the outer circle of the large wheel of the first end concentric wheel 1; S3 represents the distance moved by the outer circle of the large wheel of the first intermediate concentric wheel 21; S4 represents the distance moved by the outer circle of the large wheel of the second intermediate concentric wheel 22; S5 represents the distance moved by the outer circle of the large wheel of the second end concentric wheel 3; when the concentric wheel group is in motion, in the same time, the distance moved by the small wheel of the first intermediate concentric wheel 21 is equal to the distance of the large wheel of the first end concentric wheel 1; the distance moved by the small wheel of the second intermediate concentric wheel 22 is equal to the distance of the large wheel of the first intermediate concentric wheel 21; the distance moved by the small wheel of the second end concentric wheel 3 is equal to the distance of the large wheel of the second intermediate concentric wheel 22;

[0086] like Figure 3 As shown, the small wheel of the concentric wheel 1 at the first end is used as the power input, and the large wheel of the concentric wheel 3 at the second end is used as the output. Assume that the radius of the small wheel is r, and the radius of the large wheel is R, R:r=2:1; the linear velocity of the small wheel of the concentric wheel 1 at the first end is V0, and the linear velocity of the large wheel of the concentric wheel 1 at the first end is V1. Since the angular velocities of the small wheel and the large wheel of the concentric wheel 1 at the first end are the same, V1=2πR, V0=2πr, therefore V1=2V0; from the above process, it can be deduced that V2=2V1, V3=2V2, V4=2V3=16V0, that is, the linear velocity of the large wheel of the concentric wheel 3 at the second end is 16 times that of the small wheel of the concentric wheel 1 at the first end. From the above process, it can be deduced that V 输出 =V 输入 (R / r) n , where n is the total number of concentric wheels. By adjusting the radius ratio of the large wheel and the small wheel and the total number of concentric wheels, the speed-up effect can be adjusted. Therefore, the vehicle speed-up device of the present invention can significantly increase the speed, and its speed-up effect is better than that of the existing vehicle transmission structure, and high-speed displacement can be achieved at a low cost.

[0087] An embodiment of the present invention further provides a high-speed rail speed-up device, comprising:

[0088] Any of the above-mentioned concentric wheel groups, the concentric wheel group is arranged on a high-speed train;

[0089] The small wheel of the concentric wheel 1 at the first end is connected to the output end of the traction motor of the high-speed train in a transmission manner with the same linear speed;

[0090] The large wheel of the concentric wheel 3 at the second end is transmission-connected to the input end of the gearbox of the high-speed train at the same linear speed.

[0091] The present invention can also be used in the catapult of carrier-based aircraft on an aircraft carrier in theory. Assuming that a conveyor belt is installed on the deck of an aircraft carrier to catapult the carrier-based aircraft, the power of the engine or motor and the concentric wheel group radius ratio and the required number of concentric wheels are designed based on the principle that the belt transmission speed must reach the take-off speed of the carrier-based aircraft.

[0092] A speed-up device for launching aircraft from an aircraft carrier, comprising: any of the above-mentioned concentric wheel groups, wherein the small wheel of the concentric wheel 1 at the first end is connected to the output end of the modified engine in a transmission manner with the same linear speed;

[0093] The large wheel of the concentric wheel 3 at the second end is connected to the input end of the transmission belt modified on the aircraft carrier in a transmission manner with the same linear speed.

[0094] In the above embodiments, Figure 3 As shown, the small wheel of the concentric wheel 1 at the first end is used as the power input, and the large wheel of the concentric wheel 3 at the second end is used as the output. Assume that the radius of the small wheel is r, and the radius of the large wheel is R, R:r=2:1; the linear velocity of the small wheel of the concentric wheel 1 at the first end is V0, and the linear velocity of the large wheel of the concentric wheel 1 at the first end is V1. Since the angular velocities of the small wheel and the large wheel of the concentric wheel 1 at the first end are the same, V1=2πR, V0=2πr, therefore V1=2V0; from the above process, it can be deduced that V2=2V1, V3=2V2, V4=2V3=16V0, that is, the linear velocity of the large wheel of the concentric wheel 3 at the second end is 16 times that of the small wheel of the concentric wheel 1 at the first end. From the above process, it can be deduced that V 输出 =V 输入 (R / r) n , where n is the total number of concentric wheels. By adjusting the radius ratio of the large wheel and the small wheel and the total number of concentric wheels, the speed-up effect can be adjusted; therefore, the high-speed rail speed-up device of the present invention can significantly increase the speed, and its speed-up effect is better than the existing high-speed rail transmission structure, and high-speed displacement can be achieved at a low cost.

[0095] The present invention takes vehicle speed-up and high-speed rail and aircraft carrier-based aircraft catapult speed-up as examples. In actual application, through reasonable layout and design, when the material strength and reaction force can be met, it can theoretically satisfy the ideal value of movement speed for moving objects, that is, sufficient power can achieve sufficient speed.

[0096] The above is only a specific embodiment of the present invention, and its main protection scope is to use the concentric wheel set as a labor-saving, labor-saving driving and object speed-up method, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. Concentric wheel set, characterized in that: include: A first end concentric wheel (1), wherein the first end concentric wheel (1) comprises a small wheel and a large wheel which are coaxially arranged; At least one intermediate concentric wheel, the intermediate concentric wheel comprising a coaxially arranged small wheel and a large wheel, the small wheel of the intermediate concentric wheel being transmission-connected to the large wheel of the first end concentric wheel (1) at the same linear speed; The second end concentric wheel (3) comprises a coaxially arranged small wheel and a large wheel, and the small wheel of the second end concentric wheel (3) is transmission-connected with the large wheel of the central concentric wheel in a manner of having the same phase speed.

2. The concentric wheel assembly according to claim 1, characterized in that: The intermediate concentric wheels include a first intermediate concentric wheel (21) and a second intermediate concentric wheel (22); The small wheel of the first intermediate concentric wheel (21) is transmission-connected to the large wheel of the first end concentric wheel (1) at the same linear speed; The small wheel of the second intermediate concentric wheel (22) is transmission-connected with the large wheel of the first intermediate concentric wheel (21) at the same linear speed.

3. The concentric wheel assembly according to claim 1, characterized in that: The radius ratio of the large wheel and the small wheel of the first end concentric wheel (1), the radius ratio of the large wheel and the small wheel of the middle concentric wheel, and the radius ratio of the large wheel and the small wheel of the second end concentric wheel (3) are all 2:1, and the radius of the large wheel of the first end concentric wheel (1), the large wheel of the middle concentric wheel, and the large wheel of the second end concentric wheel (3) are the same.

4. The concentric wheel assembly according to claim 1, characterized in that: The first end concentric wheel (1), the middle concentric wheel and the second end concentric wheel (3) are all sprockets; the small wheel of the middle concentric wheel and the large wheel of the first end concentric wheel (1) are driven by a chain; and the small wheel of the second end concentric wheel (3) and the large wheel of the center concentric wheel are driven by a chain.

5. The concentric wheel assembly according to claim 1, characterized in that: The first end concentric wheel (1), the middle concentric wheel and the second end concentric wheel (3) are all synchronous pulleys; the small wheel of the middle concentric wheel and the large wheel of the first end concentric wheel (1) are driven by a synchronous belt, and the small wheel of the second end concentric wheel (3) and the large wheel of the center concentric wheel are driven by a synchronous belt.

6. A lifting structure, characterized in that: include: Crane frame; The concentric wheel assembly according to any one of claims 1 to 5, wherein the concentric wheel assembly is arranged on the lifting frame; A winding roller connected to the first end concentric wheel (1), wherein the winding roller and the first end concentric wheel (1) are coaxially arranged; A lifting wire, the lifting wire is wound around the outside of the winding roller, and a hook is provided at the movable end of the lifting wire; Lifting ropes used to tie up lifting objects; A handle is connected to the outer circumferential surface of the large wheel of the concentric wheel (3) at the second end.

7. A transport device, characterized in that: include: transport locomotive; The concentric wheel set according to any one of claims 1 to 5, wherein the concentric wheel set is arranged on the transport locomotive; The small wheel of the first end concentric wheel (1) is connected to the input end of the transmission system of the transport locomotive in a transmission manner with the same linear speed; The large wheel of the second end concentric wheel (3) is transmission-connected to the output end of the engine of the transport locomotive in a manner with the same linear speed.

8. A vehicle speed-up device, characterized in that: include: The concentric wheel set according to any one of claims 1 to 5, wherein the concentric wheel set is arranged on a vehicle; The small wheel of the first end concentric wheel (1) is connected to the output end of the engine of the vehicle in a transmission manner with the same linear speed; The large wheel of the second end concentric wheel (3) is transmission-connected to the input end of the driving output device of the vehicle in a manner with the same linear speed.

9. A high-speed rail speed-up device, characterized in that: include: The concentric wheel assembly according to any one of claims 1 to 5, wherein the concentric wheel assembly is arranged on a high-speed train; The small wheel of the first end concentric wheel (1) is connected to the output end of the traction motor of the high-speed train in a transmission manner with the same linear speed; The large wheel of the second end concentric wheel (3) is transmission-connected to the input end of the gearbox of the high-speed train in a manner with the same linear speed.

10. A speed-up device for launching aircraft from an aircraft carrier, characterized in that: include: The concentric wheel assembly according to any one of claims 1 to 5, wherein the small wheel of the first end concentric wheel (1) is transmission-connected to the output end of the modified engine in a manner with the same linear speed; The large wheel of the second end concentric wheel (3) is connected to the input end of a transmission belt modified on the aircraft carrier in a transmission manner with the same linear speed.

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