Variable-speed-ratio linear transmission device based on double-clutch principle and application method

Abstract

The invention relates to a variable-speed-ratio linear transmission device based on a double-clutch principle and an application method. The variable-speed-ratio linear transmission device is characterized in that double clutches, a planet carrier and an output gear mounting shaft are all fixed to an equipment shell; the two cycloidal gears are mounted on a crankshaft, and the two ends of the crankshaft are rotationally mounted on a planet carrier; the other end of the input shaft is in driving connection with the input end of the double clutch; the nested input gear shaft is rotationally mounted on the planet carrier and consists of a toothed outer gear shaft and a toothed inner gear shaft; the tooth parts of the two gear shafts are respectively engaged with two teeth of the plurality of duplex synchronous gears in a switching manner; the shaft ends of the plurality of duplex synchronous gears are coaxially and fixedly connected with the shaft ends of the plurality of cranks respectively; the pin wheel housing is rotationally mounted on the planet carrier and meshed with the cycloidal gear, outer ring teeth of the pin wheel housing are meshed with the output gear, and the output gear is rotationally supported on the output gear mounting shaft; the output gear is fixedly connected with the screw, and the nut outputs linear motion. Rotary motion is converted into linear motion, and two-speed-ratio transmission can be achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of equipment transmission, and relates to a linear transmission device, and in particular to a variable speed ratio linear transmission device based on a dual clutch principle and an application method thereof. Background Art

[0002] In recent years, with the continuous improvement of rapid response, reliability and safety of national defense equipment, fast mobile equipment represented by vehicle-mounted missiles and artillery has gradually switched from hydraulic drive to electric drive. However, due to space limitations, strict requirements are placed on the structure of the electric drive, and usually motor + reduction equipment is required to meet the requirements of instantaneous high load and compact structure.

[0003] At present, there is a common problem in the design of lifting devices. The load carried by the lifting device is usually raised from the horizontal state by 0 to 90 degrees with the hinge as the fulcrum. This structure determines that the main resistance of the motion mechanism comes from the gravity of the load. As the load gradually rises, the force arm of gravity becomes shorter and shorter, and the resistance of the transmission system becomes smaller and smaller. The motor of the transmission system will maintain the highest speed from beginning to end, which will cause the motor output power to gradually decrease. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention proposes a variable speed ratio linear transmission device based on the dual clutch principle and an application method thereof, wherein the variable speed ratio linear transmission device can achieve high torque output through a large speed ratio and high output speed through a small speed ratio.

[0005] One of the above objects of the present invention is achieved by the following technical solution:

[0006] A variable speed ratio linear transmission device based on the dual clutch principle, characterized by comprising an input shaft, a dual clutch, a nested input gear shaft, a double synchronous gear, a crankshaft, a cycloid wheel, a pin gear housing, a planet carrier, an output gear, an output gear mounting shaft, and a ball screw;

[0007] The dual clutch, planet carrier and output gear mounting shaft are all fixed on the equipment housing; the two cycloid wheels are rotatably mounted on the relatively eccentric parts of the crankshaft, and the two ends of the crankshaft are rotatably mounted on the planet carrier; the input shaft is a power input part, one end of the input shaft is connected to the power source, and the other end of the input shaft is drivingly connected to the input end of the dual clutch; the nested input gear shaft is installed on the planet carrier as a whole through a bearing and has axial freedom relative to the planet carrier; the nested input gear shaft is composed of a toothed external gear shaft and a toothed internal gear shaft; the toothed internal gear shaft forms a through-fit with the toothed external gear shaft in a clearance fit manner, and the toothed portion of the toothed internal gear shaft and the toothed external gear shaft respectively form tooth meshing with two teeth of a plurality of double synchronous gears in a switchable manner;

[0008] The shaft ends of the multiple double synchronous gears are respectively coaxially fixedly connected with the shaft ends of the multiple crankshafts;

[0009] Bearings are installed at both ends of the inner cavity of the pin gear housing, and the pin gear housing can be relatively rotatably installed on the planetary carrier through the bearings. The middle part of the inner cavity of the pin gear housing is meshed with the cycloid wheel, and the outer ring of the pin gear housing is provided with teeth, which form a tooth meshing with the output gear; the output gear is rotatably supported on the output gear mounting shaft through bearings; the output gear is coaxially fixedly connected with the screw of the ball screw, and the nut is threadedly connected to the screw, and the rotational motion is converted into linear motion output through the nut.

[0010] Moreover, the shaft portion of the toothed external gear shaft is a hollow shaft, one end of which is a driving connection end matched with one output end of the dual clutch, and the other end of the shaft portion of the toothed external gear shaft is provided with a large gear portion; the shaft portion of the toothed internal gear shaft is installed in the shaft hole of the toothed external gear shaft in a clearance fit manner, one end of which is a driving connection end matched with the other output end of the dual clutch, and the other end of the toothed internal gear portion is provided with a small gear portion;

[0011] Multiple double synchronous gears are composed of coaxially arranged small gears and large gears. In the low speed ratio transmission state, the small gears of the multiple double synchronous gears are meshed with the large gear portion of the nested input gear shaft; in the high speed ratio transmission state, the large gears of the multiple double synchronous gears are meshed with the small gear portion of the nested input gear shaft.

[0012] Moreover, a threaded hole is arranged at the end of the output gear, which is fixedly connected to a flange arranged at one end of the screw rod of the ball screw through a circle of screws.

[0013] The second objective of the present invention is achieved by the following technical solutions:

[0014] A variable speed ratio linear transmission device based on the dual clutch principle is used in a lifting device as follows:

[0015] In the first half of the lifting process, the small gear portion of the nested input gear shaft meshes with the large gear portion of the double synchronous gear, and at the same time, the large gear portion of the nested input gear shaft disengages from the small gear portion of the double synchronous gear; in the second half of the first half of the lifting process, the large gear portion of the nested input gear shaft is switched to mesh with the small gear portion of the double synchronous gear, and at the same time, the small gear portion of the nested input gear shaft disengages from the large gear portion of the double synchronous gear, thereby achieving high torque output through the large speed ratio in the first half and increasing output speed and power through the smaller speed ratio in the second half.

[0016] The advantages and positive effects of the present invention are:

[0017] 1. The present invention can accurately and efficiently convert rotational motion into linear motion, and through the switching engagement of the nested input gear shaft and the double synchronous gears, two speed ratio transmissions can be achieved to meet the high-precision and accurate driving requirements in various military equipment fields.

[0018] 2. The present invention uses a variable speed ratio in the transmission structure to achieve power improvement in the second half of the jacking process, achieves high torque output through a large speed ratio in the first half and increases output speed through a smaller speed ratio in the second half, thereby enabling the motor to maintain high-power operation and meet the high-speed movement requirements of the jacking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a transmission principle diagram of a variable speed ratio linear transmission device based on a dual clutch principle of the present invention;

[0020] Figure 2 It is an appearance diagram of the variable speed ratio linear transmission device based on the dual clutch principle of the present invention (the input shaft is shown in the figure);

[0021] Figure 3 It is a cross-sectional view of a variable speed ratio linear transmission device based on the dual clutch principle of the present invention. DETAILED DESCRIPTION

[0022] The structure of the present invention is further described below with reference to the accompanying drawings and by way of examples. It should be noted that the present examples are descriptive rather than restrictive.

[0023] A variable speed ratio linear transmission device based on the dual clutch principle, see Figure 1-Figure 3 The invention point is: it includes input shaft 1, dual clutch 2, nested input gear shaft 3, double synchronous gear 4, crank shaft 5, cycloid wheel 10, pin gear housing 7, planet carrier 6, output gear 8, output gear mounting shaft 11, ball screw. The nut of the ball screw is a linear power output part to achieve the output of linear motion.

[0024] Among them, the dual clutch, the planetary carrier and the output gear mounting shaft are all fixed on the equipment housing. The two cycloid wheels are rotatably mounted on the relative eccentric parts of the crankshaft through bearings, and the two ends of the cycloid wheels are rotatably mounted on the planetary carrier. The input shaft is a power input part, one end of the input shaft is connected to the power source, and the other end of the input shaft is drivingly connected to the input end of the dual clutch. The nested input gear shaft is installed on the planetary carrier as a whole through bearings and has axial freedom relative to the planetary carrier. The nested input gear shaft is composed of a toothed external gear shaft and a toothed internal gear shaft. The shaft portion of the toothed external gear shaft is a hollow shaft, one end of which is a driving connection end that matches one output end of the dual clutch, and the other end of the shaft portion of the toothed external gear shaft is provided with a large gear portion 3.1. The shaft portion of the toothed internal gear shaft is installed in the shaft hole of the toothed external gear shaft in a clearance fit manner, and one end of the shaft portion is a driving connection end that matches the other output end of the dual clutch, and the other end of the toothed internal gear portion is provided with a small gear portion 3.2.

[0025] The multiple double synchronous gears are composed of a coaxially arranged small gear 4.1 and a large gear 4.2. In the low speed ratio transmission state, the small gears of the multiple double synchronous gears are meshed with the large gear part of the nested input gear shaft; in the high speed ratio transmission state, the large gears of the multiple double synchronous gears are meshed with the small gear part of the nested input gear shaft. The shaft ends of the multiple double synchronous gears are coaxially fixedly connected with the shaft ends of the multiple crankshafts, respectively, for driving the crankshafts to rotate.

[0026] Bearings are installed at both ends of the inner cavity of the pin gear housing, and the pin gear housing can be relatively rotatably installed on the planet carrier through the bearings. The middle of the inner cavity of the pin gear housing meshes with the cycloid wheel. The outer ring of the pin gear housing is provided with teeth 7.1, which form a tooth mesh with the output gear. The output gear is rotatably supported on the output gear mounting shaft through bearings. A threaded hole is provided at the end of the output gear, which is fixedly connected to the flange at one end of the screw of the ball screw through a circle of screws to realize the transmission of the output power to the screw 9. The screw is connected to the nut 12 through threads, and finally the rotational motion is converted into linear motion output through the nut.

[0027] The transmission principle of the variable speed ratio linear transmission device based on the dual clutch principle of the present invention is:

[0028] The motion and torque are input into the dual clutch, which is connected to the nested input shaft. The inner and outer shafts of the nested input shaft are respectively connected to two sun gears, which are meshed with the double synchronous gears, which are connected to the crankshaft, thereby realizing a variable speed ratio design in the first-stage transmission. The double synchronous gear drives the crankshaft to rotate, thereby driving the cycloid wheel to do planar motion. At the same time, the cycloid wheel and the pin gear housing mesh with each other and drive the pin gear housing to rotate. Finally, through the meshing of gears, the motion and the amplified torque are transmitted through the output gear.

[0029] The method of using the present invention in a jacking device is as follows:

[0030] In the first half of the jacking process, the small gear portion of the nested input gear shaft meshes with the large gear portion of the double synchronous gear, and at the same time, the large gear portion of the nested input gear shaft disengages from the small gear portion of the double synchronous gear; in the second half of the first half of the jacking process, the large gear portion of the nested input gear shaft is switched to mesh with the small gear portion of the double synchronous gear, and at the same time, the small gear portion of the nested input gear shaft disengages from the large gear portion of the double synchronous gear, thereby achieving high torque output through the large speed ratio in the first half and increased output speed and power through the smaller speed ratio in the second half, thereby enabling the motor to maintain high-power operation and meet the high-speed movement requirements of the jacking device.

[0031] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A variable speed ratio linear transmission device based on the dual clutch principle, characterized in that: It includes input shaft, dual clutch, nested input gear shaft, double synchronous gear, crankshaft, cycloid wheel, pin gear housing, planet carrier, output gear, output gear mounting shaft, and ball screw; The dual clutch, planet carrier and output gear mounting shaft are all fixed on the equipment housing; the two cycloid wheels are rotatably mounted on the relatively eccentric parts of the crankshaft, and the two ends of the crankshaft are rotatably mounted on the planet carrier; the input shaft is a power input part, one end of the input shaft is connected to the power source, and the other end of the input shaft is drivingly connected to the input end of the dual clutch; the nested input gear shaft is installed on the planet carrier as a whole through a bearing and has axial freedom relative to the planet carrier; the nested input gear shaft is composed of a toothed external gear shaft and a toothed internal gear shaft; the toothed internal gear shaft forms a through-fit with the toothed external gear shaft in a clearance fit manner, and the toothed portion of the toothed internal gear shaft and the toothed external gear shaft respectively form tooth meshing with two teeth of a plurality of double synchronous gears in a switchable manner; The shaft ends of the multiple double synchronous gears are respectively coaxially fixedly connected with the shaft ends of the multiple crankshafts; Bearings are installed at both ends of the inner cavity of the pin gear housing, and the pin gear housing can be relatively rotatably installed on the planetary carrier through the bearings. The middle part of the inner cavity of the pin gear housing is meshed with the cycloid wheel, and the outer ring of the pin gear housing is provided with teeth, which form a tooth meshing with the output gear; the output gear is rotatably supported on the output gear mounting shaft through bearings; the output gear is coaxially fixedly connected with the screw of the ball screw, and the nut is threadedly connected to the screw, and the rotational motion is converted into linear motion output through the nut.

2. The variable speed ratio linear transmission device based on the dual clutch principle according to claim 1 is characterized in that: The shaft portion of the toothed external gear shaft is a hollow shaft, one end of which is a driving connection end matched with one output end of the dual clutch, and the other end of the shaft portion of the toothed external gear shaft is provided with a large gear portion; the shaft portion of the toothed internal gear shaft is installed in the shaft hole of the toothed external gear shaft in a clearance fit manner, one end of which is a driving connection end matched with the other output end of the dual clutch, and the other end of the toothed internal gear portion is provided with a small gear portion; Multiple double synchronous gears are composed of coaxially arranged small gears and large gears. In the low speed ratio transmission state, the small gears of the multiple double synchronous gears are meshed with the large gear portion of the nested input gear shaft; in the high speed ratio transmission state, the large gears of the multiple double synchronous gears are meshed with the small gear portion of the nested input gear shaft.

3. The variable speed ratio linear transmission device based on the dual clutch principle according to claim 1, characterized in that: A threaded hole is arranged at the end of the output gear, and is fixedly connected to a flange arranged at one end of the screw rod of the ball screw through a circle of screws.

4. A method for using a variable speed ratio linear transmission device based on the dual clutch principle in a jacking device, characterized in that: In the first half of the lifting process, the small gear portion of the nested input gear shaft meshes with the large gear portion of the double synchronous gear, and at the same time, the large gear portion of the nested input gear shaft disengages from the small gear portion of the double synchronous gear; in the second half of the lifting process, the large gear portion of the nested input gear shaft is switched to mesh with the small gear portion of the double synchronous gear, and at the same time, the small gear portion of the nested input gear shaft disengages from the large gear portion of the double synchronous gear, thereby achieving high torque output through the large speed ratio in the first half and increasing output speed and power through the smaller speed ratio in the second half.

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