CN107939814B

CN107939814B - Connection type transmission crankshaft and assembling equipment thereof

Info

Publication number: CN107939814B
Application number: CN201711184168.2A
Authority: CN
Inventors: 张丽敏
Original assignee: Jiaxing Xinzhou Machinery Parts Co Ltd
Current assignee: Jiaxing Xinzhou Machinery Parts Co., Ltd
Priority date: 2017-11-23
Filing date: 2017-11-23
Publication date: 2020-06-05
Anticipated expiration: 2037-11-23
Also published as: CN107939814A; CN110744229A; CN110744229B; CN110666334A; CN110666335A; CN110666335B; CN110744186B; CN110744186A; CN110666334B

Abstract

The invention relates to a connecting type transmission crankshaft and assembling equipment thereof, which comprises a power input section and a bearing installation section which are respectively arranged at two horizontal ends, wherein a first crankshaft group and a second crankshaft group are arranged between the power input section and the bearing installation section in a straight line shape, and the power input section and the first crankshaft group, the first crankshaft group and the second crankshaft group, and the second crankshaft group and the bearing installation section are fixed by welding. According to the invention, each crankshaft group is arranged in a segmented manner, the problems of integrated machining are solved at one time in a segmented machining mode, the assembling problem is solved through the welding seam supporting device, the welding seam supporting device can also play a role in ensuring the final precision, rigidity and strength of a final product, the problem of radial movement of the crankshaft can also be solved, the dependence on expensive machining equipment can be reduced, and the machining cost is reduced.

Description

Connection type transmission crankshaft and assembling equipment thereof

Technical Field

The invention relates to the technical field of crankshaft manufacturing, in particular to a connecting type transmission crankshaft and assembling equipment thereof.

Background

In the known technical field, the crankshaft is generally used for various engines or transmission mechanisms, the crankshaft mainly bears the force transmitted by a connecting rod and converts the force into torque to output driving force through the crankshaft, the crankshaft is subjected to the combined action of centrifugal force of rotating mass, periodically-changed inertia force and reciprocating inertia force to bear the action of bending and twisting load, so that the crankshaft is required to have enough strength and rigidity, meanwhile, the surface of a shaft neck needs to be wear-resistant, the work is uniform, the balance is good, and the radial play and the concentricity of different crankshaft parts during work need to be considered.

The existing processing technology mainly comprises casting forming and numerical control processing, the processing precision and other parameters of the casting forming are far inferior to those of the numerical control processing, the numerical control precision processing can meet the precision, rigidity and strength required by a crankshaft, and meanwhile, the crankshaft can be integrally formed to directly finish the shaft neck. But numerical control processing equipment is with high costs, and single is gone up the computer and is synthesized the expense also high, especially adds man-hour to the longer, the less little bent axle of bent axle size of axial direction length, and requirement to numerical control machine tool is higher, because in six numerical control processing, axle type part only has two axial clamping position, when the design to the bent axle contained angle, need fully consider the effect of clamping force, but if length is longer, the clamping tip at its both ends hardly bears radial processing cutting dynamics, leads to the problem of whole machining precision. At the same time, the variation in length also places extremely high demands on the chip cutters, which tends to reduce the yield overall, and also increases the processing cost if the number of processes per unit processing batch is not high and more expensive equipment needs to be purchased.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the problems are solved, required parameters such as precision, strength and rigidity can be guaranteed, dependence on expensive processing equipment is reduced, processing cost is reduced, the crankshaft transmission crankshaft is suitable for crankshafts with long axial direction sizes, and the connecting type transmission crankshaft and assembling equipment thereof are provided.

The technical scheme adopted by the invention for solving the technical problems is as follows: a connection type transmission crankshaft comprises a power input section and a bearing installation section which are respectively arranged at two horizontal ends, wherein a first crankshaft group and a second crankshaft group are arranged between the power input section and the bearing installation section in a straight line shape, the first crankshaft group and the second crankshaft group are respectively provided with two eccentric shaft discs which are mutually in an eccentric state, the first crankshaft group and the second crankshaft group are symmetrically arranged, the power input section and the first crankshaft group, the first crankshaft group and the second crankshaft group, the second crankshaft group and the bearing installation section are fixed through welding, welding seam supporting devices are arranged, a synchronous shaft is arranged below the transmission crankshaft, and the welding seam supporting devices are connected with the synchronous shaft.

Further, as a specific structural form, the welding seam supporting device is provided with an annular sleeve, a gap for filling hot-melt plastic is arranged between the annular sleeve and a welding seam, a plurality of T-shaped tenons are rotatably arranged on the side wall of the annular sleeve by taking the central axis of the annular sleeve as the center, the end parts of the T-shaped tenons penetrate through the annular sleeve and are embedded into the surface of a corresponding crankshaft, a sliding contact sleeve is arranged on the outer side of the annular sleeve, a sliding contact ring with an oval cross section is embedded into the surface of the outer ring of the sliding contact sleeve and is in close contact with the annular sleeve, a connecting sleeve is arranged on the inner ring of the sliding contact sleeve, a rubber connecting ring is arranged between the connecting sleeve and the sliding contact sleeve, the rubber connecting ring is provided with an annular body, and a plurality of protruding ends with a round cross section are rotatably arranged on the annular body by taking the central axis of the annular body as the center, and the convex ends respectively protrude out of the outer side surface and the inner side surface of the circular ring body, and the convex parts of the convex ends are respectively embedded into the inner side surface of the corresponding sliding contact sleeve and the outer side surface of the connecting sleeve.

Further, as a specific structural form, the invention is provided with a synchronous shaft sleeve outside the synchronous shaft, and the inner side surfaces of the connecting sleeves in the welding seam supporting device are connected with the synchronous shaft sleeve through needle roller bearings.

A first clamping device, a welding assembly component, a flexible centering device and a second clamping device are sequentially arranged on an installation table board along the horizontal linear direction, the first clamping device and the second clamping device are symmetrically arranged, the welding assembly component and the flexible centering device are arranged on the same platform capable of reciprocating along a straight line,

the first clamping device is provided with two mounting panels which are symmetrically arranged, an initial position adjusting device is arranged between the two mounting panels, the initial position adjusting device is provided with a height adjusting block which can vertically reciprocate up and down, two symmetrical lateral pressing heads are arranged at two ends of the height adjusting block, the lateral pressing heads are inclined and gathered towards the middle part of the height adjusting block, the bottoms of the lateral pressing heads are embedded into the upper end surface of the height adjusting block, the mounting panels are movably connected with the lateral pressing heads, a rotary locking and buckling device is arranged at the upper part of the height adjusting block, an adaptive pressing device is arranged on the rotary locking and buckling device, the adaptive pressing device is provided with an upper limiting block fixed on the rotary locking and buckling device, a lower pressing head is arranged below the upper limiting block, and a first sliding magnetic head is fixed above the lower pressing head in a threaded manner, a second sliding magnetic head is connected below the upper limiting block in a sliding manner, an adjusting spring is arranged between the second sliding magnetic head and the upper limiting block, the first sliding magnetic head is in close contact with the second sliding magnetic head through an inclined surface, the lower pressing head and the two lateral pressing heads are used for clamping the end part of the crankshaft,

the welding assembly component is provided with a welding fixing ring with an opening on the side surface, the welding fixing ring can reciprocate back and forth along the vertical direction,

the flexible centering device is provided with a driving ring driven by a motor, a driven ring is arranged beside the driving ring, a flexible connecting bracket assembly is arranged between the driving ring and the driven ring, the flexible connecting bracket assembly is provided with two connecting plates arranged at intervals, a fixed supporting rod is arranged between the connecting plates, three adjusting assemblies are rotationally arranged between the connecting plates by taking the central axis of the driving ring as the center, the adjusting assemblies are provided with extrusion rods arranged along the axis direction of the driving ring, the end parts of the extrusion rods are all hinged with linkage plates, fastening plates are arranged at the positions corresponding to the end parts of the extrusion rods one by one and the connecting plates, sliding adjusting grooves are arranged at the end parts of the fastening plates and the connecting plates corresponding to the fastening plates, limiting columns are arranged on the linkage plates, and one ends of the limiting columns are hinged with the linkage plates, the other end penetrates through the corresponding fastening plate and the sliding adjusting groove in the connecting plate, the fastening plate positioned on one side of the transmission ring is fixedly connected with the transmission ring, and the fastening plate positioned on one side of the driven ring is fixedly connected with the driven ring.

Further, as a specific structural form, an adjusting groove is formed in the side wall of the installation panel, and the lateral pressing head is movably connected with the adjusting groove.

Further, as a specific structural form, the flexible centering device also comprises a reset expansion mechanism, the reset expansion mechanism is provided with a connecting shaft assembly arranged between the connecting plates, an electric oil cylinder is arranged on the connecting shaft assembly, the extending end part of the electric oil cylinder is rotatably connected with the connecting shaft assembly, and the end part of the body of the electric oil cylinder is hinged with the driven ring.

Further, as a specific structural form, the connecting shaft assembly provided by the invention is provided with a plurality of segmented shaft bodies arranged at intervals, connecting rolling balls are arranged between every two adjacent segmented shaft bodies, each connecting rolling ball is rotatably connected with the extending end part of the electric oil cylinder, and the connecting shaft assembly is also provided with mounting pins penetrating through all the segmented shaft bodies and the connecting rolling balls.

Further, as a specific structure form, the flexible centering device also has an annular base, and the driven ring is rotatably connected with the annular base

Further, as a specific structural style, a tray is arranged below the welding fixing ring, one end of the tray is hinged to the bottom of the welding fixing ring, the other end of the tray supports the bottom of the welding fixing ring, the bottom of the tray is a plane which is inclined upwards, a vertical upright post is arranged at the bottom of the tray, a cam disc is rotatably connected to the top end of the vertical upright post, and the cam disc abuts against the bottom of the tray.

The invention has the beneficial effects that: according to the invention, each crankshaft group is arranged in a segmented manner, the problems of integrated machining are solved at one time in a segmented machining mode, the assembling problem is solved through the welding seam supporting device with a pure mechanical structure, meanwhile, the welding seam supporting device can also play a role in ensuring the final precision, rigidity and strength of a final product, and the problem of radial movement of the crankshaft can be solved, and meanwhile, special assembling equipment is designed for assembling the welding seam supporting device, so that the dependence on expensive machining equipment can be reduced on the whole, the machining cost is reduced, and the machining efficiency is improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of a coupled drive crankshaft of the present invention;

FIG. 2 is an enlarged partial schematic view at A of FIG. 1;

FIG. 3 is a cross-sectional view at the rubber coupling ring of the present invention;

FIG. 4 is a schematic view of the construction of the assembling apparatus of the present invention;

FIG. 5 is a first schematic structural view of a first clamping device according to the present invention;

FIG. 6 is a second schematic structural view of the first clamping device of the present invention;

FIG. 7 is a cross-sectional view of a first clamping device of the present invention;

FIG. 8 is an enlarged partial schematic view at B of FIG. 7;

FIG. 9 is a first schematic view of the flexible centering device of the present invention;

FIG. 10 is a second schematic structural view of the flexible centering device of the present invention;

FIG. 11 is a schematic view of a portion of a flexible centering device of the present invention;

FIG. 12 is a schematic view of a second embodiment of the flexible centering device of the present invention;

FIG. 13 is a schematic structural view of a flexible joint stent assembly of the present invention;

FIG. 14 is a partial cross-sectional view of the flexible joint cradle assembly of the present invention at the joint shaft assembly;

FIG. 15 is a schematic structural view of a welding assembly of the present invention;

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 1 to fig. 3, a preferred embodiment of a coupled transmission crankshaft of the present invention includes a power input section 1 and a receiving installation section 2 respectively disposed at two horizontal ends, a first crank set 31 and a second crank set 32 are disposed in a straight line between the power input section 1 and the receiving installation section 2, and the first crank set 31 and the second crank set 32 both have two eccentric disks 33 which are mutually eccentric, it is obvious that in practice, the two eccentric disks 33 may not have the same size, or each set may have more than 2 eccentric disks 33, and not only the state of the minimum number, but also the first crank set 31 and the second crank set 32 are symmetrically disposed, mainly for facilitating centering welding, and convenient for clamping, and the space between the power input section 1 and the first crank set 31, the space between the first crank set 31 and the second crank set 32, and the space between the second crank set 32 and the receiving installation section 2 are all fixed by welding, and all are equipped with welding seam strutting arrangement 4, are equipped with synchronizing shaft 5 below the transmission bent axle, welding seam strutting arrangement 4 all couples with synchronizing shaft 5.

The welding seam supporting device 4 is provided with an annular sleeve 41, a gap for filling hot melt plastic is arranged between the annular sleeve 41 and a welding seam, a plurality of T-shaped tenons 42 for stopping are rotatably arranged on the side wall of the annular sleeve 41 by taking the central axis of the annular sleeve 41 as the center, the end parts of the T-shaped tenons 42 penetrate through the annular sleeve 41 and are embedded in the corresponding surface of the crankshaft, a sliding contact sleeve 43 is arranged on the outer side of the annular sleeve 41, a sliding contact ring 44 with an oval cross section is embedded in the surface of the outer side ring of the sliding contact sleeve 43, the sliding contact ring 44 is tightly contacted with the annular sleeve 41, a connecting sleeve 45 is arranged on the inner ring of the sliding contact sleeve 43, a rubber connecting ring 46 is arranged between the connecting sleeve 45 and the sliding contact sleeve 43, the rubber connecting ring 46 is provided with an annular body 461, and a plurality of protruding ends 462 with a round cross section are rotatably arranged on the annular body 461 by taking the central axis of the annular body 461, the protruding ends 462 protrude from the outer surface and the inner surface of the circular ring body 461 respectively, and the protruding portions of the protruding ends 462 are embedded into the corresponding inner surface of the sliding contact sleeve 43 and the outer surface of the connecting sleeve 45 respectively.

A synchronous shaft sleeve 51 is arranged on the outer side of the synchronous shaft 5, and the inner side surfaces of the connecting sleeves 45 in the weld seam supporting device 4 are connected with the synchronous shaft sleeve 51 through needle bearings.

In the actual whole crankshaft movement process, along with the rotation of the crankshaft, the annular sleeve 41 also rotates along with the crankshaft, the slight play of a radial shaft is absorbed through the rolling friction of the sliding contact ring 44, the working stability of the long-size crankshaft can be further ensured, the vibration absorbed by the sliding contact ring 44 can be further absorbed through the rubber connecting ring 46, meanwhile, the rubber connecting ring 46 also has the function of transmitting friction force, the good supporting function can be achieved through the support of each welding seam supporting device 4, the problem that the fatigue strain is easily generated at the welding seam of a pure welding shaft, the structural strength is reduced is avoided, the whole crankshaft can work more stably and reliably, the welding seam supporting devices 4 are further fully utilized, each welding seam supporting device 4 indirectly passes through the synchronous shaft sleeve 51, the linkage effect can be achieved, the radial small displacement of the long-size crankshaft at each welding seam can be balanced, the concentricity and the synchronous stability are ensured, if the synchronous shaft 5 is applied to a large torque and a low rotating speed, a driving device of the synchronous shaft 5 can be additionally arranged, so that the synchronous shaft 5 and the crankshaft have opposite rotation directions, and the effects of preventing movement, absorbing vibration and keeping the stability are better.

The embodiment of the assembling device for the connecting type transmission crankshaft of the invention as shown in fig. 4-15 comprises a mounting table 6, a first clamping device 7, a welding assembly 8, a flexible centering device 9 and a second clamping device 10 are sequentially arranged on the mounting table 6 along a horizontal straight line direction, the first clamping device 7 and the second clamping device 10 are symmetrically arranged, the welding assembly 8 and the flexible centering device 9 are arranged on the same platform capable of reciprocating along a straight line for adjusting the axial position,

the first clamping device 7 is provided with two symmetrically arranged mounting panels 71, an initial position adjusting device 72 is arranged between the two mounting panels 71, the initial position adjusting device 72 is provided with a height adjusting block 721 capable of vertically reciprocating up and down, two symmetrical lateral pressing heads 722 are arranged at two ends of the height adjusting block 721, the lateral pressing heads 722 are in a shape of inclining and gathering towards the middle part of the height adjusting block 721, the bottoms of the lateral pressing heads 722 are embedded in the upper end face of the height adjusting block 721, the mounting panels 71 are movably connected with the lateral pressing heads 722, adjusting grooves 711 are arranged on the side walls of the mounting panels 71, the lateral pressing heads 722 are movably connected with the adjusting grooves 711, a rotary locking and buckling device 73 is arranged at the upper part of the height adjusting block 721, an adaptive pressing device 74 is arranged on the rotary locking and buckling device 73, the adaptive pressing device 74 is provided with an upper limit block 741 fixed on the rotary locking and buckling device 73, a lower pressing head 742 is arranged below the upper limiting block 741, a first sliding magnetic head 743 is screwed and fixed above the lower pressing head 742, a second sliding magnetic head 744 is connected below the upper limiting block 741 in a sliding manner, an adjusting spring 745 is arranged between the second sliding magnetic head 744 and the upper limiting block 741, the first sliding magnetic head 743 and the second sliding magnetic head 744 are in close contact through an inclined plane, the ends of the crankshafts are clamped between the lower pressing head 742 and the two lateral pressing heads 722 and jointly act to clamp a group of crankshafts to be bent,

the welding assembly component 8 is provided with a welding fixing ring 81 with an opening on the side surface, a welding head is arranged on the upper portion of the welding fixing ring 81, the opening size of the welding fixing ring is consistent with that of the annular sleeve 41, the welding fixing ring 81 can reciprocate along the vertical direction to adjust the height, a tray 82 is arranged below the welding fixing ring 81, one end of the tray 82 is hinged to the bottom of the welding fixing ring 81, the other end of the tray 82 supports the bottom of the welding fixing ring 81, the bottom of the tray 82 is a plane in an inclined upward shape, a vertical upright post 83 is arranged at the bottom of the tray 82, a cam disc 84 is rotatably connected to the top end of the vertical upright post 83, and the cam disc 84 supports against the bottom of the tray 82.

The flexible centering device 9 is provided with a driving ring 91 driven by a motor, a driven ring 92 is arranged beside the driving ring 91, a flexible connecting support component 93 is arranged between the driving ring 91 and the driven ring 92, the flexible connecting support component 93 is provided with two connecting plates 931 arranged at intervals, a fixed support rod 932 is arranged between the connecting plates 931, three adjusting components 933 are rotatably arranged between the connecting plates 931 by taking the central axis of the driving ring 91 as the center, each adjusting component 933 is provided with a pressing rod 9331 arranged along the axial direction of the driving ring 91, the end parts of the pressing rods 9331 are all hinged with a linkage plate 9332, fastening plates 9333 are arranged at the positions corresponding to the connecting plates 931 one by one corresponding to the end parts of the pressing rods 9331, sliding adjusting grooves 934 are arranged at the end parts of the fastening plates 9333 and the connecting plates 931 corresponding to the fastening plates 9333, and limiting columns 9334 are arranged on the linkage plate 9332, one end of the limiting column 9334 is hinged to the linkage plate 9332, the other end of the limiting column 9334 penetrates through the corresponding fastening plate 9333 and the sliding adjusting groove 934 in the connecting plate 931, the fastening plate 9333 on one side of the transmission ring 91 is fixedly connected with the transmission ring 91, and the fastening plate 9333 on one side of the driven ring 92 is fixedly connected with the driven ring 92. Flexible centering device 9 still has the expansion mechanism 94 that resets, the expansion mechanism 94 that resets has the connecting axle subassembly 941 of setting between connecting plate 931, is equipped with electric cylinder on connecting axle subassembly 941, electric cylinder's the tip that stretches out is connected with connecting axle subassembly 941 rotation, electric cylinder's cylinder body tip is articulated with driven circle 92. The connecting shaft assembly 941 has a segmentation axle body 9411 that a plurality of sections intervals set up, all is equipped with between two adjacent segmentation axle bodies 9411 and connects the spin 9412, all rotates with the tip that stretches out of electric cylinder on every connection spin 9412 to be connected, the connecting shaft assembly 941 still has the installation pin 9413 that runs through all segmentation axle bodies 9411 and connect spin 9412, flexible centering device 9 still has annular base 95, driven circle 92 rotates with annular base 95 and is connected.

The assembling equipment is mainly used for welding between the crankshaft groups and assembling the annular sleeve, and in actual use: because the central axis of the crankshaft at the input end and the axis of the crankshaft group at the crank neck are eccentric, when designing the welding separation, taking into account the design scheme of utilizing the existing included angle at two ends and the particularity of the crankshaft structure, when clamping, the first crankshaft group 31 is inserted into the first clamping device 7 from the left side, the positions of the two lateral pressing heads 722 for supporting can be adjusted in the vertical direction through the height adjusting block 721 to be used as the basic fixed position, then the locking buckle device 73 is rotated to be locked, the lower pressing head 742 is ensured to be arranged above the first crankshaft group 31, the clamping position is the uppermost side and the lowermost side of the actual first crankshaft group 31, the second crankshaft group 32 is inserted into the second clamping device 10 from the right side and the same operation is carried out, and the part of the second crankshaft group 32 is arranged between the pressing rods 9331 in the flexible centering device 9, besides, the annular sleeve 41 is required to be arranged in the opening of the welding fixing ring 81, obviously, the weld positions of the first crank set 31 and the second crank set 32 are also located in the inner ring of the annular sleeve 41, and since a certain gap actually exists between the annular sleeve 41 and the weld, when the ultrasonic welding device is arranged at the upper end of the welding fixing ring 81, the welding between the first crank set 31 and the second crank set 32 does not affect the placement of the welding fixing ring 81, and the specific gap size can be designed according to the actual working conditions for the fixing rings 81 with openings of different sizes.

Then, the motor is started to drive the transmission ring 91 to rotate, while the transmission ring 91 rotates, the fixed support rod 932 transmits power to the driven ring 92, so as to ensure the rotation of the three adjusting assemblies 933, in the rotating process, due to the existence of centrifugal force, the extrusion rod 9331 is not fixed, through the action of the sliding adjusting groove 934 and the linkage plate 9332, the extrusion rod 9331 gradually draws close to the middle, finally the limitation of the second crankshaft group 32 in the radial direction is completed, then the ultrasonic welding device is started, so that the welding process is completed between the second crankshaft group 32 and the first crankshaft group 31, in the gradually completing welding process, the second crankshaft group 32 and the first crankshaft group 31 are gradually connected into a whole to rotate, at the moment, the lower pressing head 742 in the first clamping device 7 can absorb and solve the problem of radial play in the welding completion process, the precision is ensured, and the lower pressing head 742 can slide between the first sliding magnetic head 743 and the second sliding head 744, the pressing force of the adjusting spring 745 is adaptively adjusted to adapt to the finally determined position of the overall central axis of the second crank assembly 32 under the action of the extrusion rod 9331, meanwhile, the tray 82 below the welding fixing ring 81 can also adaptively and finely adjust the height of the welding fixing ring 81 under the action of the cam disc 84, after the welding is completed, the filling work of the hot-melt plastic in the annular sleeve 41 is performed, and the subsequent assembly only needs to adopt common mechanical tools.

In order to stop the rotation of the whole crankshaft after the welding purpose is achieved, a pressure sensor can be arranged on the pressure bearing surface of the adjusting spring 745, a displacement sensor can also be arranged at the position of the welding fixing ring 81, the effect of monitoring the state is achieved, and the best scheme for producing the required size model is achieved through the adjustment of experimental data. When the resetting is required, the pressing rod 9331 can be indirectly reset by driving the electric oil cylinder in the resetting expansion mechanism 94.

After the second crank set 32 and the first crank set 31 are welded, the next crank set or the power input section 1 and the receiving installation section 2 can be continuously welded, and referring to the above working process, in order to ensure the concentricity of welding, a longer part is generally required to be arranged on one side of the second clamping device 10, and the length dimension of the extrusion rod 9331 can be selected according to actual conditions.

In the above embodiment, obviously, flexible centering devices 9 may be adopted on both sides to ensure higher precision, or a technical scheme that a plurality of flexible centering devices 9 are arranged in the horizontal straight line direction is adopted, so that a better effect can be achieved, but the technological requirement for tool operation during welding is higher, but the difficulty of directly processing the long-size shaft body through a six-axis numerical control machine is far lower than that of directly processing the long-size shaft body.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a connection type transmission crankshaft, includes that the branch arranges power input section (1) at horizontal both ends in, accepts erection section (2), its characterized in that: a first crankshaft group (31) and a second crankshaft group (32) are arranged between the power input section (1) and the bearing installation section (2) in a straight line shape, the first crankshaft group (31) and the second crankshaft group (32) are respectively provided with two eccentric shaft discs (33) which are mutually in an eccentric state, the first crankshaft group (31) and the second crankshaft group (32) are symmetrically arranged, the power input section (1) and the first crankshaft group (31), the first crankshaft group (31) and the second crankshaft group (32), the second crankshaft group (32) and the bearing installation section (2) are fixed by welding and are respectively provided with a welding seam supporting device (4), a synchronous shaft (5) is arranged below the transmission crankshaft, and the welding seam supporting devices (4) are respectively connected with the synchronous shaft (5),

the welding seam supporting device (4) is provided with an annular sleeve (41), a gap for filling hot melt plastic is arranged between the annular sleeve (41) and a welding seam, the central axis of the annular sleeve (41) is used as the center, a plurality of T-shaped tenons (42) are rotatably arranged on the side wall of the annular sleeve (41), the end parts of the T-shaped tenons (42) penetrate through the annular sleeve (41) and are embedded into the surface of a corresponding crankshaft, a sliding contact sleeve (43) is arranged on the outer side of the annular sleeve (41), a sliding contact ring (44) with an oval cross section is embedded into the surface of the outer side ring of the sliding contact sleeve (43), the sliding contact ring (44) is in close contact with the annular sleeve (41), a connecting sleeve (45) is arranged on the inner ring of the sliding contact sleeve (43), a rubber connecting ring (46) is arranged between the connecting sleeve (45) and the sliding contact sleeve (43), and the rubber connecting ring (46) is provided with an annular body (461), the central axis of the circular ring body (461) is used as the center, a plurality of protruding ends (462) with circular cross sections are rotatably arranged on the circular ring body (461), the protruding ends (462) respectively protrude out of the outer side surface and the inner side surface of the circular ring body (461), and the protruding parts of the protruding ends (462) are respectively embedded into the inner side surface of the corresponding sliding contact sleeve (43) and the outer side surface of the connecting sleeve (45).

2. A linked drive crankshaft as defined in claim 1 wherein: and a synchronous shaft sleeve (51) is arranged on the outer side of the synchronous shaft (5), and the inner side surfaces of the connecting sleeves (45) in the welding seam supporting device (4) are connected with the synchronous shaft sleeve (51) through needle bearings.