Air cylinder with stroke adjusted in progressive mode and AMT (automated mechanical transmission) using air cylinder

Abstract

The utility model relates to an air cylinder with stroke progressive adjustment and an AMT (automated mechanical transmission) using the air cylinder, the air cylinder with stroke progressive adjustment comprises two stages of air cylinders which are sequentially connected in series, the cylinder body of the first-stage air cylinder is fixed on a rack, the free end of a piston push rod of the first-stage air cylinder is fixedly connected with the cylinder body of the second-stage air cylinder, and the free end of the piston push rod of the second-stage air cylinder is fixedly connected with the rack. The free end of a piston push rod of the second-stage air cylinder serves as an output end. The stroke of the piston push rod of the second-stage air cylinder is twice that of the piston push rod of the first-stage air cylinder. According to the scheme of the stroke progressive type adjusting air cylinder system, physical devices such as relatively fewest execution air cylinders can be used, and multi-section equal-stroke displacement control is achieved; according to the scheme of the stroke progressive type adjusting cylinder system, the number of the execution cylinders and the number of the corresponding gas circuit control valves can be reduced to the maximum extent under the condition that the number of needed equidistant displacement is larger, and therefore the weight of the needed cylinder system is reduced, the size of the cylinder system is reduced, and the cost of the cylinder system is reduced.

Description

Technical Field:

[0002] The utility model relates to a cylinder with stroke progressive adjustment and an AMT transmission using the cylinder. Background Art:

[0004] In many application scenarios such as industry and transportation, some mechanisms are required to achieve progressive stroke adjustment and control. For example: it is required that the target can stop at any one of n equally spaced displacements. Of course, it is a feasible solution to control each displacement with a cylinder. However, when the number n of equally spaced displacements is large, the number of actuating cylinders and corresponding pneumatic control valves required will be large, resulting in an increase in the cost of the system.

[0005] For example, in the Chinese patent "A Humanoid Robot Based on the Hybrid Connection of Pneumatic Muscles and Cylinders", publication number CN108481308B, it uses pneumatic muscles and cylinders to drive the movement of the shoulder joint, waist joint, hip joint, knee joint and foot, and has the function of completely simulating human movement; the humanoid robot is composed of a cylinder, breastbone, vertebra, pelvis, femur, pneumatic muscle, connecting plate, fibula and foot. The shoulder joint and waist joint driven by multiple cylinders in parallel have flexion and extension, adduction and abduction, circumduction and movement in three directions of X, Y and Z. The hip joint and knee joint driven by multiple pneumatic muscles both have flexion and extension, adduction and abduction, circumduction movements. The combination of multiple calf cylinders and foot cylinders drives the foot to perform flexion and extension, adduction and abduction, circumduction and movement in three directions of X, Y and Z. This patent uses multiple cylinders to drive to achieve different strokes, and the number of pneumatic control valves is large, increasing the cost of the system. Summary of the Invention:

[0007] In view of the above problems, the purpose of the utility model is to provide a cylinder with stroke progressive adjustment and an AMT transmission using the cylinder. The cylinder with stroke progressive adjustment and the AMT transmission using the cylinder have simple structures and low manufacturing costs, and can achieve displacement control of multiple equal strokes with the least number of cylinders.

[0008] The cylinder with stroke progressive adjustment of the utility model is characterized in that: it includes two cylinders connected in series in sequence, wherein the cylinder body of the first-stage cylinder is fixed on the frame, the free end of the piston push rod of the first-stage cylinder is fixedly connected with the cylinder body of the second-stage cylinder, and the free end of the piston push rod of the second-stage cylinder is used as the output end; the stroke of the piston push rod of the second-stage cylinder is twice that of the piston push rod of the first-stage cylinder.

[0009] The cylinder with stroke progressive adjustment of the present utility model is characterized in that: it includes three cylinders connected in series in sequence, wherein the cylinder block of the first-stage cylinder is fixed on the frame, the free end of the piston push rod of the first-stage cylinder is fixedly connected with the cylinder block of the second-stage cylinder, the free end of the piston push rod of the second-stage cylinder serves as the output end, the free end of the piston push rod of the second-stage cylinder is fixedly connected with the cylinder block of the third-stage cylinder, and the free end of the piston push rod of the third-stage cylinder serves as the output end; the stroke of the piston push rod of the third-stage cylinder is twice that of the piston push rod of the second-stage cylinder, and the stroke of the piston push rod of the second-stage cylinder is twice that of the piston push rod of the first-stage cylinder.

[0010] The cylinder with stroke progressive adjustment of the present utility model is characterized in that: it includes four cylinders connected in series in sequence, wherein the cylinder block of the first-stage cylinder is fixed on the frame, the free end of the piston push rod of the first-stage cylinder is fixedly connected with the cylinder block of the second-stage cylinder, the free end of the piston push rod of the second-stage cylinder serves as the output end, the free end of the piston push rod of the second-stage cylinder is fixedly connected with the cylinder block of the third-stage cylinder, the free end of the piston push rod of the third-stage cylinder serves as the output end, the free end of the piston push rod of the third-stage cylinder is fixedly connected with the cylinder block of the fourth-stage cylinder, and the free end of the piston push rod of the fourth-stage cylinder serves as the output end; the stroke of the piston push rod of the fourth-stage cylinder is twice that of the piston push rod of the third-stage cylinder, the stroke of the piston push rod of the third-stage cylinder is twice that of the piston push rod of the second-stage cylinder, and the stroke of the piston push rod of the second-stage cylinder is twice that of the piston push rod of the first-stage cylinder.

[0011] Preferably, the cylinders at all levels are coaxially arranged.

[0012] Preferably, except for the cylinder block of the first cylinder, the cylinder blocks of the cylinders at the other levels are slidably connected to the machine body.

[0013] The AMT transmission using the aforementioned cylinder of the present utility model is characterized in that: it includes an AMT transmission and a shift fork arranged on the AMT transmission, and the free end of the piston push rod serving as the output end is connected to the shift fork to realize the shift adjustment of the AMT transmission.

[0014] The cylinder with stroke progressive adjustment proposed by the present utility model can realize multi-segment equal-stroke displacement control with the least number of cylinders, that is, for example: 2 cylinders can realize 4 equal-distance displacements, 3 cylinders can realize 8 equal-distance displacements, 4 cylinders can realize 16 equal-distance displacements, and so on: the number of positions that can be realized = 2 n ; It can be seen that: the more the number of required equal-distance displacements, the more cylinders are saved, and the more significant the effects of weight, volume, and cost savings. Description of the drawings:

[0016] Figure 1It is the structural diagram of an embodiment of the present utility model;

[0017] Figure 2 It is the working mechanism diagram of an embodiment of the present utility model;

[0018] Figure 3 It is the mechanism diagram of the cylinder of the present utility model applied to the AMT transmission. Specific implementation manner:

[0020] The present utility model will be further described below in conjunction with the accompanying drawings and specific implementation manners.

[0021] Taking two cylinders as an example

[0022] The cylinder with stroke progressive adjustment of the present utility model includes two cylinders connected in series in sequence. Among them, the cylinder block of the first-stage cylinder 1 is fixed on the frame 2, and the free end of the piston push rod 3 of the first-stage cylinder is fixedly connected to the cylinder block 4 of the second-stage cylinder. The free end of the piston push rod 5 of the second-stage cylinder is used as the output end; the stroke of the piston push rod 5 of the second-stage cylinder is twice that of the piston push rod 3 of the first-stage cylinder.

[0023] Taking three cylinders as an example

[0024] The cylinder with stroke progressive adjustment of the present utility model includes three cylinders connected in series in sequence. Among them, the cylinder block of the first-stage cylinder is fixed on the frame, the free end of the piston push rod of the first-stage cylinder is fixedly connected to the cylinder block of the second-stage cylinder, the free end of the piston push rod of the second-stage cylinder is used as the output end, the free end of the piston push rod of the second-stage cylinder is fixedly connected to the cylinder block of the third-stage cylinder, and the free end of the piston push rod of the third-stage cylinder is used as the output end; the stroke of the piston push rod of the third-stage cylinder is twice that of the piston push rod of the second-stage cylinder, and the stroke of the piston push rod of the second-stage cylinder is twice that of the piston push rod of the first-stage cylinder.

[0025] Taking four cylinders as an example

[0026] The cylinder with stroke progressive adjustment of the utility model includes four cylinders connected in series in sequence. Among them, the cylinder block of the first-stage cylinder is fixed on the frame, and the free end of the piston push rod of the first-stage cylinder is fixedly connected to the cylinder block of the second-stage cylinder. The free end of the piston push rod of the second-stage cylinder serves as the output end, and the free end of the piston push rod of the second-stage cylinder is fixedly connected to the cylinder block of the third-stage cylinder. The free end of the piston push rod of the third-stage cylinder serves as the output end, and the free end of the piston push rod of the third-stage cylinder is fixedly connected to the cylinder block of the fourth-stage cylinder. The free end of the piston push rod of the fourth-stage cylinder serves as the output end; the stroke of the piston push rod of the fourth-stage cylinder is twice that of the piston push rod of the third-stage cylinder, the stroke of the piston push rod of the third-stage cylinder is twice that of the piston push rod of the second-stage cylinder, and the stroke of the piston push rod of the second-stage cylinder is twice that of the piston push rod of the first-stage cylinder.

[0027] The cylinders at all levels above can be coaxially arranged. However, in order to save axial space, they can also be non-coaxially arranged. In addition, except for the cylinder block of the first cylinder, the cylinder blocks of the remaining cylinders at all levels are slidably connected to the machine body.

[0028] Of course, the above can also be cylinders with 5, 6 to N levels. The connection structure is that the cylinders at all levels are connected in series as described above, the piston push rod of the previous stage is connected to the cylinder block of the next stage, and the stroke of the piston push rod of the next stage is twice that of the piston push rod of the previous stage.

[0029] The following further illustrates the present utility model with reference to the accompanying drawings (taking two-stage cylinders as an example);

[0030] As Figure 1 shown, to achieve the control of 4 equidistant positions with 2 cylinders, the action mechanism of the cylinder with stroke progressive adjustment is described:

[0031] As Figure 1 shown, this embodiment consists of 2 cylinders. The inner diameters of the 2 cylinders (the effective piston areas involved are the same). Among them, the piston stroke of cylinder A (the first-stage cylinder) is L, and the piston stroke of cylinder B (the second-stage cylinder) is 2L. The cylinder block of cylinder B is fixed on the piston push rod led out of cylinder A, forming a series-connected cylinder system. The displacement stroke of this cylinder system is equal to the displacement stroke between the cylinder block of cylinder A and the piston push rod of cylinder B. Cylinder A and cylinder B have their own independent intake and exhaust valves for control.

[0032] Use Figure 2 to describe the operation of the cylinder system to obtain each displacement:

[0033] In the state at the uppermost row in the figure: Both cylinder A and cylinder B are in the state of exhausting air. The pistons of the 2 cylinders are not pushed by air pressure and remain in the state close to the left end. The displacement of the piston push rod of cylinder B relative to the cylinder block of cylinder A is zero (at the leftmost end in this figure).

[0034] In the second row of the figure, the A cylinder intakes air, pushing the piston to move right by a stroke L of the A cylinder. The cylinder block of the B cylinder fixedly connected to it is also pushed right by a stroke L. At this time, the B cylinder is in the air release state, and the piston of the B cylinder remains stationary relative to the cylinder block of the B cylinder. Therefore, the displacement of the piston push rod of the B cylinder relative to the fixed end (the cylinder block of the A cylinder) is L.

[0035] In the third row of the figure, the A cylinder releases air. Under the action of the spring (not shown in the figure), the piston of the A cylinder retracts to the leftmost position. The B cylinder intakes air, and the piston is pushed to move right relative to the cylinder block of the B cylinder by a stroke, and this stroke is 2L. Since the cylinder block of the B cylinder is connected to the piston push rod of the A cylinder (at this time, the piston of the A cylinder is in the airless state and at the leftmost position), the displacement of the piston push rod of the B cylinder relative to the fixed end is 2L.

[0036] In the fourth row of the figure, the A cylinder intakes air and the B cylinder intakes air. The pistons of both cylinders are pushed by the gas to move right relative to their respective cylinder blocks. Due to the series connection relationship of the two cylinders, the strokes of these two displacements are superimposed, making the displacement of the piston push rod of the B cylinder relative to the fixed end be L + 2L = 3L.

[0037] The above is the working mechanism of obtaining 4 stroke positions with n = 2, 2 cylinders, and 2 air valves.

[0038] When n = 3, referring to the above mechanism, with 3 cylinders and 3 air valves, 8 positions with a displacement step of L can be combined; when n = 4, with 4 cylinders and 4 air valves, 16 positions with a displacement step of L can be combined; after n takes a fixed value, similar effects as described above can be obtained, and the mechanism is similar, so it will not be elaborated here.

[0039] The mechanism of the present utility model has the following advantages:

[0040] 1. For the stroke progressive adjustment cylinder system solution, relatively few physical devices such as actuating cylinders can be used to achieve multi-stage equal-stroke displacement control.

[0041] 2. For the stroke progressive adjustment cylinder system solution, the more the number of required equal-distance displacements, the more the number of actuating cylinders and the corresponding air path control valves can be reduced to the greatest extent, thereby reducing the weight of the required cylinder system, decreasing the volume of the cylinder system, and lowering the cost of the cylinder system.

[0042] The cylinder with stroke progressive adjustment proposed by the present utility model can achieve multi-stage equal-stroke displacement control with the least number of cylinders. That is, for example: 2 cylinders can achieve 4 equal-distance displacements, 3 cylinders can achieve 8 equal-distance displacements, 4 cylinders can achieve 16 equal-distance displacements, and so on: the number of positions that can be achieved = 2 n ; It can be seen that: the more the number of required equal-distance displacements, the more cylinders can be saved, and the more significant the effects of weight, volume, and cost savings.

[0043] In addition, the present utility model uses the aforementioned cylinder in an AMT transmission (as Figure 3 shown), which includes an AMT transmission K1 and a shift fork K2 provided on the AMT transmission. The free end of the piston push rod as the output end is connected to the shift fork K2 to achieve shift adjustment of the AMT transmission. However, using the aforementioned two-cylinder method can provide four-gear adjustment control for the AMT transmission, while using the aforementioned three-cylinder method can provide eight-gear adjustment control for the AMT transmission.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them; although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: it is still possible to modify the specific implementation manners of the present utility model or perform equivalent replacements for some technical features; without departing from the spirit of the technical solutions of the present utility model, they should all be covered within the scope of the technical solutions claimed by the present utility model.

Claims

1. A cylinder with stroke-level progressive adjustment, characterized in that: It includes two levels of cylinders connected in series in sequence, wherein the cylinder block of the first-level cylinder is fixed on the frame, the free end of the piston push rod of the first-level cylinder is fixedly connected to the cylinder block of the second-level cylinder, and the free end of the piston push rod of the second-level cylinder serves as the output end; the stroke of the piston push rod of the second-level cylinder is twice that of the piston push rod of the first-level cylinder.

2. A cylinder with stroke-level progressive adjustment, characterized in that: It includes three levels of cylinders connected in series in sequence, wherein the cylinder block of the first-level cylinder is fixed on the frame, the free end of the piston push rod of the first-level cylinder is fixedly connected to the cylinder block of the second-level cylinder, and the free end of the piston push rod of the second-level cylinder serves as the output end, the free end of the piston push rod of the second-level cylinder is fixedly connected to the cylinder block of the third-level cylinder, and the free end of the piston push rod of the third-level cylinder serves as the output end; the stroke of the piston push rod of the third-level cylinder is twice that of the piston push rod of the second-level cylinder, and the stroke of the piston push rod of the second-level cylinder is twice that of the piston push rod of the first-level cylinder.

3. A cylinder with stroke-level progressive adjustment, characterized in that: It includes four levels of cylinders connected in series in sequence, wherein the cylinder block of the first-level cylinder is fixed on the frame, the free end of the piston push rod of the first-level cylinder is fixedly connected to the cylinder block of the second-level cylinder, and the free end of the piston push rod of the second-level cylinder serves as the output end, the free end of the piston push rod of the second-level cylinder is fixedly connected to the cylinder block of the third-level cylinder, and the free end of the piston push rod of the third-level cylinder serves as the output end, the free end of the piston push rod of the third-level cylinder is fixedly connected to the cylinder block of the fourth-level cylinder, and the free end of the piston push rod of the fourth-level cylinder serves as the output end; the stroke of the piston push rod of the fourth-level cylinder is twice that of the piston push rod of the third-level cylinder, the stroke of the piston push rod of the third-level cylinder is twice that of the piston push rod of the second-level cylinder, and the stroke of the piston push rod of the second-level cylinder is twice that of the piston push rod of the first-level cylinder.

4. The cylinder with stroke progressive adjustment according to claim 1, 2 or 3, characterized in that: The cylinders at all levels are coaxially arranged.

5. The cylinder with stroke progressive adjustment according to claim 1, 2 or 3, characterized in that: Except for the cylinder block of the first cylinder, the cylinder blocks of the remaining cylinders at all levels are slidably connected to the body.

6. An AMT transmission using a cylinder as described in any one of claims 1-5, characterized in that: It includes an AMT transmission and a shift fork arranged on the AMT transmission, and the free end of the piston push rod serving as the output end is connected to the shift fork to realize the shift adjustment of the AMT transmission.

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