CN212429673U

CN212429673U - Transmission mechanism

Info

Publication number: CN212429673U
Application number: CN202020562221.9U
Authority: CN
Inventors: 李文全; 李采恩
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-09
Filing date: 2020-04-09
Publication date: 2021-01-29
Anticipated expiration: 2030-04-09

Abstract

A kind of drive mechanism, involve the machine manufacturing technology of the work piece or other products for processing the cross section to become ellipse, including container body, power shaft, turning to the change-speed gear box A, turning to change-speed gear box B, sliding drive shaft, guide rail mechanism, eccentric shaft or crankshaft, tie rod; the numerical control interpolation technology of the prior art method can not ensure the continuous smoothness of the variable elliptic curve curved surface of the processed workpiece, the profiling explorator processing can not meet the high precision requirement, and the high requirements of the shape and position precision, the surface quality and the curve curved surface consistency of the workpiece can not be ensured; the transmission mechanism is applied to the processing and manufacturing of variable-ellipse workpieces, the problems are fundamentally solved, the continuous smooth curve surface of the workpiece which is actively and controllably processed and formed can be ensured, the capabilities of obtaining higher processing precision, form and position precision, surface quality and workpiece curve surface consistency are ensured, and the processing process is simpler and more efficient.

Description

Transmission mechanism

Technical Field

The invention relates to a mechanical manufacturing technology of a workpiece or a product with a variable ellipse section, in particular to a transmission mechanism.

Background

The method is characterized in that a workpiece or a product with a variable ellipse section is manufactured by adopting methods such as numerical control interpolation machining and profiling machining, the numerical control interpolation machining technology is typically applied to machining of a piston skirt variable ellipse, a special numerical control lathe is used for clamping a piston blank to rotate at a high speed, a tool rest servo system is used for fitting a variable ellipse curve as far as possible by controlling high-frequency response and adjusting feed quantity of a tool to realize variable ellipse machining, two powers are involved in a key process of forming the variable ellipse curve from different directions, the tool feed must accurately track the rotation angle of a main shaft in the machining process, and the profile precision is difficult to guarantee due to position errors; the numerical control interpolation technology is characterized in that point taking or optimized point taking is carried out through a computer, a cutter is required to finish cutting machining in high-frequency response reciprocating motion, discontinuous intermittent cutting machining is carried out, steps or circular arcs are formed between two cutting points, a machined curve cannot be continuous and smooth, a continuous and smooth variable elliptic curve curved surface cannot be machined and formed directly in principle, and the surface quality cannot meet the requirement of high requirements easily; the processing precision of the profiling method is difficult to meet high requirements, and the processing precision and the surface quality of a curved surface of the die are difficult to meet the high requirements. A processing technical method for continuously and smoothly forming the non-circular curve surface of the variable-ellipse workpiece is not found.

Disclosure of Invention

In order to solve the defects of the prior art, the invention provides a different solution to the prior variable-ellipse workpiece manufacturing technology, and realizes the direct cutting machining forming of the variable-ellipse continuous smooth curve curved surface.

The first scheme is as follows:

the same power source firstly transmits power to a steering gearbox A, the steering gearbox A transmits the power to a steering gearbox B, and the power transmission mode is a series connection mode.

A transmission mechanism comprises a box body, a power shaft, a steering gearbox A, a steering gearbox B, a sliding transmission shaft, a guide rail mechanism, an eccentric shaft or a crankshaft, a connecting rod, a workbench and a power source.

The power shafts comprise a first power shaft of a steering gearbox A and a second power shaft of a steering gearbox B; the steering gearbox A is fixedly arranged on the box body, a first power shaft and a first power output shaft which are perpendicular to each other are arranged on the steering gearbox A, and an eccentric shaft or a crankshaft is arranged at the tail end of the first power output shaft; the steering gearbox B is arranged on the guide rail mechanism, a second power shaft and a second power output shaft which are perpendicular to each other are arranged on the steering gearbox B, and the guide rail mechanism is fixedly arranged on the box body.

And a first power shaft of the steering gearbox A is connected with a second power shaft of the steering gearbox B through a sliding transmission shaft, and power is transmitted at a constant speed.

The same power source transmits power to a steering gearbox A, and the steering gearbox A transmits the power to a steering gearbox B through a first power shaft, a sliding transmission shaft and a second power shaft; the steering gearbox A simultaneously transmits power to the eccentric shaft or the crankshaft through the first power output shaft.

The second power output shaft is parallel to the first power output shaft, the second power output shaft extends out of the box body, the tail end of the second power output shaft is fixedly provided with a workbench, the workbench surface is vertical to the second power output shaft, and the second power output shaft drives the workbench to do circular motion.

One end of the connecting rod is movably connected with the eccentric shaft or the crankshaft through a bearing, the other end of the connecting rod is movably connected with the second power output shaft through a bearing, and the eccentric shaft or the crankshaft drives the steering gear box B and the second power output shaft to do linear reciprocating motion on the guide rail mechanism so as to drive the workbench to do linear reciprocating motion.

The second power output shaft drives the workbench to do linear reciprocating motion and circular motion at the same time, and the circular motion are overlapped to form composite motion.

The guide rail mechanism comprises a guide rail frame, linear guide rails, a sliding block and a connecting plate, wherein the guide rail frame is fixedly provided with four linear guide rails which are parallel to a second power shaft of the steering gearbox B, a top plate of the guide rail frame is fixedly provided with two linear guide rails, a second power output shaft is guided through the sliding block and the connecting plate, a bottom plate of the guide rail frame is fixedly provided with two linear guide rails, and the steering gearbox B is supported and guided through the sliding block; the second power output shaft vertically penetrates through the connecting plate and is connected with the connecting plate through a bearing, and the connecting plate is installed on the linear guide rail through a sliding block on the connecting plate.

The rotating speed ratio of the first power output shaft to the first power shaft is 2: 1, the rotating speed ratio of the second power output shaft to the second power shaft is 1: 1, the first power shaft, the sliding transmission shaft and the second power shaft transmit power at a constant speed, the rotating speed ratio of the first power output shaft to the second power output shaft is 2: 1, and synchronous operation is kept according to the rotating speed ratio of 2: 1.

The eccentric shaft eccentrically moves for 2 weeks under the driving of the first power output shaft, and then drives the second power output shaft to linearly reciprocate for 2 times through the connecting rod, and the second power output shaft simultaneously circularly moves for 1 week.

The second power output shaft drives the workbench to do linear reciprocating motion for 2 times and synchronously rotate for 1 circle in a circular motion manner, the ratio of the linear reciprocating motion to the circular motion is 2: 1, and the linear reciprocating motion direction of the workbench is vertical to the axis of the circular motion of the workbench.

Preferably, the sliding transmission shaft is a splined transmission shaft.

Preferably, the eccentric distance of the eccentric shaft is adjusted or the turning radius of the connecting rod journal of the crankshaft is adjusted, for example, the turning radius of the eccentric motion is adjusted by replacing different crankshafts, and further, the length difference of the major axis and the minor axis of the variable ellipse is adjusted, so that the variable ellipse shape is adjusted.

Scheme II:

the same power source transmits power to the power distribution box, the power distribution box transmits the power to the two steering gear boxes simultaneously, and the power transmission mode is a parallel connection mode.

A transmission mechanism comprises a box body, a power shaft, a power distribution box, a steering gearbox A, a steering gearbox B, a sliding transmission shaft, a guide rail mechanism, an eccentric shaft or a crankshaft, a connecting rod, a workbench and a power source.

The first power shaft of the steering gearbox A is connected with the second power shaft of the steering gearbox B through a sliding transmission shaft.

The power distribution box is fixedly arranged on the box body and is arranged between a first power shaft of the steering gearbox A and the sliding transmission shaft;

the same power source transmits power to the power distribution box, and the power distribution box simultaneously and respectively transmits the power to the steering gearbox A and the steering gearbox B; the steering gearbox A transmits power to the eccentric shaft or the crankshaft through the first power output shaft.

The rotating speed ratio of the first power output shaft to the first power shaft is 2: 1, the rotating speed ratio of the second power output shaft to the second power shaft is 1: 1, the rotating speed ratio of the first power output shaft to the second power output shaft is 2: 1, and synchronous operation is kept according to the rotating speed ratio of 2: 1.

Preferably, the sliding transmission shaft is a splined transmission shaft.

The third scheme is as follows:

the invention does not limit whether the power sources are the same power source or not, does not limit the power transmission mode (series connection or parallel connection), and only needs to ensure that a first power output shaft and a second power output shaft which are connected with the power transmission mechanism are parallel to each other, have the rotation speed ratio of 2: 1 and keep synchronous motion according to the rotation speed ratio of 2: 1.

A transmission mechanism comprises a first power output shaft and a second power output shaft which are connected with the power transmission mechanism, an eccentric shaft or a crankshaft, a connecting rod and a workbench.

The second power output shaft is parallel to the first power output shaft, and the axes of the two shafts form a determined plane;

the tail end of the second power output shaft is fixedly provided with a workbench, the surface of the workbench is vertical to the second power output shaft, and the second power output shaft drives the workbench to do circular motion.

The tail end of the first power output shaft is provided with an eccentric shaft or a crankshaft,

one end of the connecting rod is movably connected with the eccentric shaft or the crankshaft, the other end of the connecting rod is movably connected with the second power output shaft, and the eccentric shaft or the crankshaft drives the second power output shaft to do linear reciprocating motion on the determined plane.

The rotating speed ratio of the first power output shaft to the second power output shaft is 2: 1, and synchronous operation is kept according to the rotating speed ratio of 2: 1; the eccentric shaft eccentrically moves for 2 weeks under the driving of the first power output shaft, and then drives the second power output shaft to linearly reciprocate for 2 times on the determined plane through the connecting rod, and the second power output shaft simultaneously circularly moves for 1 week.

The beneficial effects brought by the invention are as follows:

in the field of mechanical manufacturing, the processing of a non-circular curve curved surface is difficult but very important, the western manufacturing industry is the forced country inventing a numerical control interpolation technology and developing into a technology with wide application, but the processing principle determines that the problem which is difficult to solve exists, a cutter must finish cutting processing in high-frequency response reciprocating motion, steps or circular arcs must be formed between two cutting points, the processed curve cannot be continuous and smooth, even if the curve is extremely physically possible, the problem always exists. In the aspect of processing variable elliptic curve curved surfaces, numerical control interpolation processing is still a technology which is applied more. The invention is based on the motion rule of variable elliptic curve passing fixed point discovered by the first inventor, and based on the newly discovered motion principle, the invention creates the generation method of variable elliptic curve track, the generated variable elliptic curve always passes a fixed point in continuous motion, each point on the variable elliptic curve can pass the fixed point continuously and sequentially, and reciprocates circularly, and the cutting motion relation of the workpiece and the cutter is established at the fixed point, thus realizing the active controllable continuous cutting processing of the variable elliptic curve and forming the variable elliptic continuous smooth curve.

The novel technical principle is obviously superior to the numerical control interpolation principle, the technical lines are completely different, the method is a unique and fundamental manufacturing technology which is independently and originally created in China, and the processing and manufacturing problems of variable-ellipse workpieces or products can be effectively solved.

The invention fundamentally eliminates various problems in the existing variable elliptic curve surface processing method. The problems existing in the prior technical methods such as numerical control interpolation machining, profiling explorator machining and the like are pointed out in the background technology, and the invention realizes the active controllable machining and shaping of variable elliptic curves by establishing the composite cutting motion relationship between a workpiece and a cutter; the generation of the variable elliptic curve is independently completed by the compound motion of the workpiece, the cutter does not participate in the generation motion of the curve track, and only the cutting processing of the surface of the workpiece is needed to be completed, so the most mature continuous cutting process can be applied to the processing of the variable elliptic curve curved surface, the capability of obtaining higher processing precision, form and position precision, surface quality and consistency is fundamentally ensured, the continuous smoothness and precision of the variable elliptic curve curved surface of the workpiece are ensured, and the processing process is simpler and more efficient.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 2 is a partial cross-sectional view of FIG. 1;

FIG. 3 is a schematic structural view of the guide rail mechanism included in FIG. 1;

FIG. 4 is a top view of FIG. 1;

FIG. 5 is a left side view of FIG. 1;

FIG. 6 is a schematic top view of a cross-section of a workpiece processed by an elliptic curve according to a first embodiment of the present invention;

FIG. 7 is a schematic view of a crankshaft structure according to a first embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a second embodiment of the present invention;

FIG. 9 is a partial cross-sectional view of FIG. 8;

fig. 10 is a schematic structural diagram of a third embodiment of the present invention.

Wherein the content of the first and second substances,

1, a box body;

21 a first power shaft; 22 a second power shaft;

3, a steering gear box A; 31 a first power take-off shaft;

4, a spline transmission shaft;

5, a steering gear box B; 51 a second power take-off shaft;

6 a guide rail frame; 61 linear guide rails; 62 linear guide rails; 63 a linear guide rail; 64 linear guide rails; 65 a slide block; 66 sliding blocks; 67 slide block; 68 slide block; 69 a connecting plate;

7, an eccentric shaft; 8 connecting rods; 9, a workbench; 10, cutting tools; 11, a workpiece; 12, clamping; 13 a crankshaft; 14 a power distribution box; 15 power source; 16 power transmission mechanism.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The first embodiment is as follows:

as shown in fig. 1 and 3, and referring to fig. 2, 4, 5 and 7, an embodiment of the present invention provides a transmission mechanism, which includes a box 1, a first power shaft 21, a second power shaft 22, a steering gearbox a3, a first power output shaft 31, a spline transmission shaft 4, a steering gearbox B5, a second power output shaft 51, a guide rail frame 6, a linear guide rail 61, a linear guide rail 62, a linear guide rail 63, a linear guide rail 64, a slide block 65, a slide block 66, a slide block 67, a slide block 68, a connecting plate 69, an eccentric shaft 7, a connecting rod 8, a workbench 9, a tool 10, a workpiece 11, a clamp 12, a crankshaft 13 and a power source 15.

The steering gearbox A3 is fixedly arranged on the box body 1, a first power shaft 21 and a first power output shaft 31 which are perpendicular to each other are arranged on the steering gearbox A3, and the tail end of the first power output shaft 31 is provided with an eccentric shaft 7 or a crankshaft 13; the steering gear box B5 is mounted on the guide rail frame 6, a second power shaft 22 and a second power output shaft 51 which are perpendicular to each other are arranged on the steering gear box B5, and the guide rail frame 6 is fixedly mounted on the box body 1.

The first power shaft 21 of the steering transmission box A3 is connected with the second power shaft 22 of the steering transmission box B5 through a spline transmission shaft 4, and power is transmitted at a constant speed.

The power source 15 transmits power to a steering gearbox A3, and the steering gearbox A3 transmits power to a steering gearbox B5 through a first power shaft 21, a spline transmission shaft 4 and a second power shaft 22; the steering gearbox a3 simultaneously transmits power to the eccentric shaft 7 or the crankshaft 13 via the first power take-off shaft 31.

The second power output shaft 51 is parallel to the first power output shaft 31, the second power output shaft 51 extends out of the box body, the tail end of the second power output shaft is fixedly provided with the workbench 9, the table surface of the workbench 9 is vertical to the second power output shaft 51, and the second power output shaft 51 drives the workbench 9 to do circular motion.

One end of the connecting rod 8 is movably connected with the eccentric shaft 7 or the crankshaft 13 through a bearing, the other end of the connecting rod is movably connected with the second power output shaft 51 through a bearing, and the eccentric shaft 7 or the crankshaft 13 drives the steering gear box B5 and the second power output shaft 51 to do linear reciprocating motion on the guide rail frame 6, so as to drive the workbench 9 to do linear reciprocating motion.

The second power output shaft 51 drives the workbench 9 to do linear reciprocating motion and circular motion simultaneously, and the circular motion are overlapped to form composite motion. Four

linear guide rails

61, 62, 63 and 64 are fixedly installed on the guide rail frame 6 and are parallel to the second power shaft 22 of the steering gearbox B5, wherein the top plate of the guide rail frame 6 is used for fixing the two

linear guide rails

63 and 64 and guiding the second power output shaft 51 through

sliders

65, 66, 67 and 68 and a connecting plate 69, and the bottom plate of the guide rail frame 6 is used for fixing the two

linear guide rails

61 and 62 and supporting and guiding the steering gearbox B5 through the sliders; the second power take-off shaft 51 passes vertically through a connecting plate 69 and is connected to the connecting plate 69 by means of bearings, the connecting plate 69 being mounted on the

linear guides

63, 64 by means of

sliders

65, 66, 67, 68 thereon.

The rotation speed ratio of the first power output shaft 31 to the first power shaft 21 is 2: 1, the rotation speed ratio of the second power output shaft 51 to the second power shaft 22 is 1: 1, the first power shaft 21, the spline transmission shaft 4 and the second power shaft 22 transmit power at a constant speed, the rotation speed ratio of the first power output shaft 31 to the second power output shaft 51 is 2: 1, and synchronous operation is kept according to the rotation speed ratio of 2: 1.

Meanwhile, the eccentric shaft 7 eccentrically moves for 2 cycles under the driving of the first power output shaft 31, and then drives the second power output shaft 51 to linearly reciprocate for 2 times through the connecting rod 8, and the second power output shaft 51 simultaneously and circularly moves for 1 cycle.

The second power output shaft 51 drives the workbench 9 to do linear reciprocating motion for 2 times and simultaneously to do circular motion for 1 cycle synchronously, the ratio of the linear reciprocating motion to the circular motion is 2: 1, and the linear reciprocating motion direction of the workbench 9 is vertical to the axis of the circular motion of the workbench 9.

Preferably, the eccentric distance of the eccentric shaft 7 is adjusted or the turning radius of the connecting rod diameter of the crankshaft 13 is adjusted, for example, the turning radius of the eccentric motion is adjusted by replacing a different crankshaft 13, and the length difference between the major axis and the minor axis of the ellipse is adjusted to adjust the ellipse shape.

Further explanation is as follows:

referring to fig. 1, as shown in fig. 6, the schematic plan view of the elliptic curve machining of the cross section of the workpiece 11 illustrates the machining process and the machining result by way of example, the position of the tool 10 is fixed, and the upper, middle and lower diagrams in fig. 6 illustrate the corresponding relationship between the movement position of the eccentric shaft 7, the movement position of the workpiece 11 and the center position of the workpiece 11. The first power output shaft 31 drives the eccentric shaft 7 to rotate, the second power output shaft 51, the workbench 9 and the workpiece 11 are further pushed and pulled to do linear reciprocating motion through the connecting rod 8, and meanwhile, the second power output shaft 51 synchronously performs circular motion to drive the workbench 9 and the workpiece 11 to do circular motion. As shown in the upper diagram of fig. 6, the starting position of the eccentric shaft 7 is shown; the workpiece 11 moves towards the direction close to the cutter 10 at the same time in the circular motion, and the cut thickness is gradually increased, as shown in the figure of fig. 6, the first power output shaft 31 drives the eccentric shaft 7 to rotate 180 degrees, then the second power output shaft 51, the workbench 9 and the workpiece 11 rotate 90 degrees, and the moving distance towards the cutter 10 reaches the maximum, and the cut thickness of the workpiece 11 at the position is the maximum; the first power output shaft 31 continues to drive the eccentric shaft 7 to rotate, the workpiece 11 moves in the direction away from the cutter 10, the cut thickness of the workpiece is gradually reduced, as shown in the lower drawing of fig. 6, until the eccentric shaft 7 rotates 180 degrees, a circle of 360-degree rotation is completed, the workpiece returns to the starting point position, meanwhile, the workpiece 11 rotates 180 degrees, the cut thickness is minimum, and the cutting processing of a half part of the variable elliptic curve is completed; and sequentially, the eccentric shaft 7 completes the 360-degree rotation in the second circle, the workpiece 11 continues to complete the 180-degree rotation, and the 360-degree rotation in one circle is cumulatively completed, so that the continuous cutting machining and forming of the whole variable elliptic curve are completed.

Further, the following description is provided:

as shown in fig. 1 and fig. 4, the clamp 12 clamps the workpiece 11 to be processed and is fixed at the center of the workbench 9, the central axis of the workpiece 11 is coaxial with the second power output shaft 51, the power input transmission mechanism, the workbench 9 and the workpiece 11 start to move, the movement mode is a compound movement formed by overlapping circular movement and linear reciprocating movement, and the circular movement rotates for 1 circle while the linear reciprocating movement reciprocates for 2 times. The second power output shaft 51 drives the workpiece 11 to do linear reciprocating motion, and a straight line formed by the linear reciprocating motion of a point on the central axis of the workpiece 11 is used as a cutter feeding straight line for processing a section curve of the workpiece; the second power output shaft 51 drives the workpiece 11 to do linear reciprocating motion, and a plane formed by the linear reciprocating motion of the central axis of the workpiece 11 is used as a tool moving plane for processing the curved surface of the workpiece. In the cutting motion, the generation of the elliptic curve is independently completed by the compound motion of the workpiece 11, and the cutter 10 does not participate in the generation motion of the elliptic curve and only needs to complete the surface cutting. In addition, the power control tool 10 is linearly fed along the tool feeding line, the feeding is stopped when the tool is fed to a required position, and the workpiece 11 is continuously cut and machined in continuous composite motion; each point on the cross section of the workpiece 11 will repeatedly return to the cutting position in the compound motion cycle, and the precise machining and forming of the continuous smooth changed-ellipse curve of the cross section of the workpiece 11 is completed. And the cutter 10 moves on the cutter moving plane to finish cutting machining of other section curves until the workpiece 11 is machined and formed into the elliptic curved surface.

Example two:

as shown in fig. 8 and 3, and referring to fig. 4 and 5, fig. 7 and 9, the embodiment of the present invention provides a transmission mechanism, which includes a box 1, a first power shaft 21, a second power shaft 22, a steering gearbox a3, a first power output shaft 31, a spline transmission shaft 4, a steering gearbox B5, a second power output shaft 51, a guide rail frame 6, a linear guide rail 61, a linear guide rail 62, a linear guide rail 63, a linear guide rail 64, a slide block 65, a slide block 66, a slide block 67, a slide block 68, a connecting plate 69, an eccentric shaft 7, a connecting rod 8, a workbench 9, a tool 10, a workpiece 11, a clamp 12, a crankshaft 13, a power distribution box 14 and a power source 15.

On the basis of the first embodiment, the difference between the present embodiment and the first embodiment is: the power source is connected with a steering gearbox A3, the power is firstly transmitted to the steering gearbox A3 and then transmitted to a steering gearbox B5 through a spline transmission shaft 4, and the power transmission mode is a series connection mode; in the embodiment, a power distribution box 14 is connected between a first power shaft 21 of a steering gearbox A3 and a spline transmission shaft 4, the power distribution box 14 transmits power through the first power shaft 21 shared by the steering gearbox A3, the power distribution box 14 is connected with a power source 15, the power is transmitted to the steering gearbox A3 and the steering gearbox B5 through the power distribution box 14, and the power transmission mode is a parallel connection mode. Other similar methods are the same as the first embodiment, and are not repeated here. Referring to fig. 6 and 8, and referring to fig. 4, a schematic top view of the cross-sectional elliptic curve machining of the workpiece 11 and a further description of the machining process are further illustrated, which are the same as the first embodiment and are not repeated.

Example three:

on the basis of the first embodiment and the second embodiment of the present invention, the present embodiment does not limit whether the power sources are the same power source, and does not limit the power transmission mode (series or parallel), and only needs to ensure that the first power output shaft 31 and the second power output shaft 51 connected to the power transmission mechanism are parallel to each other, the rotation speed ratio is 2: 1, and the synchronous motion is maintained according to the rotation speed ratio of 2: 1.

As shown in fig. 10 and referring to fig. 7, the embodiment of the present invention further provides a transmission mechanism, which includes a first power output shaft 31, a second power output shaft 51, an eccentric shaft 7, a connecting rod 8, a worktable 9, a tool 10, a workpiece 11, a clamp 12, a crankshaft 13, and a power transmission mechanism 16.

The power transmission mechanism 16 is provided with a first power output shaft 31 and a second power output shaft 51, the two shafts are kept parallel in a static state and a moving state, the axes of the two shafts form a determined plane, the rotating speed ratio of the first power output shaft 31 to the second power output shaft 51 is 2: 1, and synchronous movement is kept according to the rotating speed ratio of 2: 1.

The tail end of the first power output shaft 31 is provided with an eccentric shaft 7 or a crankshaft 13, the tail end of the second power output shaft 51 is fixedly provided with a workbench 9, the table surface of the workbench 9 is vertical to the second power output shaft 51, and the second power output shaft 51 drives the workbench to do circular motion; one end of the connecting rod 8 is movably connected with the eccentric shaft 7 through a bearing arranged on the eccentric shaft 7 or the crankshaft 13, the other end of the connecting rod is movably connected with the second power output shaft 51 through a bearing arranged on the second power output shaft 51, the eccentric shaft 7 or the crankshaft 13 drives the second power output shaft 51 to do linear reciprocating motion on the determined plane, and further drives the workbench 9 to do linear reciprocating motion; the second power output shaft 51 drives the workbench 9 to do circular motion and simultaneously do linear reciprocating motion synchronously, and the circular motion and the linear reciprocating motion are overlapped to form composite motion. The rotating speed ratio of the first power output shaft 31 to the second power output shaft 51 is 2: 1, and synchronous operation is kept according to the rotating speed ratio of 2: 1; the eccentric shaft 7 eccentrically moves for 2 cycles under the driving of the first power output shaft 31, and then drives the second power output shaft 51 to linearly reciprocate for 2 times through the connecting rod 8, and the second power output shaft 51 synchronously and circularly moves for 1 cycle; the second power output shaft 51 drives the workbench 9 to do linear reciprocating motion for 2 times and simultaneously to do circular motion for 1 cycle synchronously, the ratio of the linear reciprocating motion to the circular motion of the workbench is 2: 1, and the linear reciprocating motion direction of the workbench is vertical to the axis of the circular motion of the workbench 9.

Preferably, the eccentric distance of the eccentric shaft 7 is adjusted or the turning radius of the shaft diameter of the crankshaft 13 is adjusted, for example, the turning radius of the eccentric motion is changed by replacing a different crankshaft 13, and the length difference of the major axis and the minor axis of the variable ellipse is adjusted to adjust the variable ellipse shape. Further explaining a schematic plan view of the cross-section variable elliptic curve machining of the workpiece 11 and further explaining the machining process, as shown in fig. 6 and fig. 10, referring to fig. 4, the contents are the same as the first embodiment and will not be repeated.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to the embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the scope of protection of the application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. 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. The utility model provides a transmission mechanism, includes box, power shaft, turns to gearbox A, turns to gearbox B, slip transmission shaft, guide rail mechanism, eccentric shaft or bent axle, connecting rod, its characterized in that:

the power shafts comprise a first power shaft of a steering gearbox A and a second power shaft of a steering gearbox B;

the steering gear box A is fixedly arranged on the box body, a first power shaft and a first power output shaft which are mutually vertical are arranged on the steering gear box A, the tail end of the first power output shaft is provided with an eccentric shaft or a crankshaft,

the steering gearbox B is arranged on the guide rail mechanism, a second power shaft and a second power output shaft which are perpendicular to each other are arranged on the steering gearbox B, and the guide rail mechanism is fixedly arranged on the box body;

the second power output shaft is parallel to the first power output shaft and extends out of the box body;

a first power shaft of the steering gearbox A is connected with a second power shaft of the steering gearbox B through a sliding transmission shaft,

one end of the connecting rod is movably connected with the eccentric shaft or the crankshaft, the other end of the connecting rod is movably connected with the second power output shaft, and the eccentric shaft or the crankshaft drives the steering gear box B and the second power output shaft to do linear reciprocating motion on the guide rail mechanism;

the rotating speed ratio of the first power output shaft to the second power output shaft is 2: 1, and the first power output shaft and the second power output shaft are kept synchronous.

2. The transmission mechanism according to claim 1, wherein the guide rail mechanism comprises a guide rail frame, four linear guide rails, a sliding block and a connecting plate, the guide rail frame is fixedly provided with the four linear guide rails, the four linear guide rails are parallel to a second power shaft of the steering gearbox B, a top plate of the guide rail frame is fixedly provided with the two linear guide rails, a second power output shaft is guided through the sliding block and the connecting plate, a bottom plate of the guide rail frame is fixedly provided with the two linear guide rails, the steering gearbox B is supported and guided through the sliding block, the second power output shaft vertically penetrates through the connecting plate and is connected with the connecting plate through a bearing, and the connecting plate is arranged on the linear guide rails through the sliding block on.

3. The transmission mechanism according to claim 1, wherein the eccentric motion radius is changed by adjusting the eccentric distance of the eccentric shaft or adjusting the revolution radius of the crankshaft.

4. The drive mechanism as recited in claim 1, wherein the sliding drive shaft is a splined drive shaft.

5. A transmission mechanism comprises a box body, a power shaft, a steering gearbox A, a power distribution box, a steering gearbox B, a sliding transmission shaft, a guide rail mechanism, an eccentric shaft or a crankshaft and a connecting rod, and is characterized in that:

the first power shaft is connected with a second power shaft of the steering gearbox B through a sliding transmission shaft,

the power distribution box is fixedly arranged on the box body, is arranged between a first power shaft and a sliding transmission shaft of the steering gearbox A, and simultaneously and respectively transmits power to the steering gearbox A and the steering gearbox B;

6. The transmission mechanism according to claim 5, wherein the guide rail mechanism comprises a guide rail frame, four linear guide rails, a sliding block and a connecting plate, the guide rail frame is fixedly provided with the four linear guide rails, the four linear guide rails are parallel to a second power shaft of the steering gearbox B, a top plate of the guide rail frame is fixedly provided with the two linear guide rails, a second output shaft is guided through the sliding block and the connecting plate, a bottom plate of the guide rail frame is fixedly provided with the two linear guide rails, the steering gearbox B is supported and guided through the sliding block, the second power output shaft vertically penetrates through the connecting plate and is connected with the connecting plate through a bearing, and the connecting plate is arranged on the linear guide rails through the sliding block on.

7. The transmission mechanism according to claim 5, wherein the eccentric motion radius is changed by adjusting the eccentric distance of the eccentric shaft or adjusting the revolution radius of the crankshaft.

8. The transmission mechanism as claimed in claim 5, wherein the sliding drive shaft is a splined drive shaft.

9. A transmission mechanism comprises a first power output shaft and a second power output shaft which are connected with the power transmission mechanism, an eccentric shaft or a crankshaft and a connecting rod, and is characterized in that:

the second power output shaft is parallel to the first power output shaft, the axes of the two shafts form a determined plane,

one end of the connecting rod is movably connected with the eccentric shaft or the crankshaft, the other end of the connecting rod is movably connected with the second power output shaft, the eccentric shaft or the crankshaft drives the second power output shaft to do linear reciprocating motion on the determined plane,

10. The transmission mechanism according to claim 9, wherein the eccentric motion radius is changed by adjusting the eccentric distance of the eccentric shaft or adjusting the revolution radius of the crankshaft.