76results about "Cranks" patented technology

Arrangement for driving an adjusting shaft (2) for adjusting the expansion stroke and / or the compression ratio of an internal combustion engine (1), wherein the arrangement has a drive motor (11) which is or can be connected to the adjusting shaft (2) via a gear mechanism, characterized in that the gear mechanism is designed as a tension wave gear mechanism (13) with a wave generator (14), an externally toothed flexspline (16) and an internally toothed ring gear meshing with the flexspline (16), and is arranged in a gear housing (22) which is or can be fastened to the crankcase (25) of the internal combustion engine (1) in such a way that the flexspline (16) always remains in the same rotational position relative to the gear housing (22), wherein the tension wave gear mechanism (13) is designed to transmit a torque to the adjusting shaft (2), the coupling end of which executes an axial and / or radial movement in an externally driven manner,an output element (35) comprising the ring gear, which is torsionally rigid and at the same time flexible and at least partially, in particular completely, decouples the flexspline (16) from the externally driven axial and / or radial movement.

The application discloses an adjustable crank structure, which comprises an adjusting block mounting seat, an eccentric adjusting block connected to the adjusting block mounting seat, a rotating axis of the adjusting block mounting seat being parallel to a center line of the eccentric adjusting block with a spacing formed between the rotating axis and the center line, and a motion characteristic of the structure being changed by adjusting the spacing, a connecting rod rotatably connected to the eccentric adjusting block, the connecting rod being capable of reciprocating under the driving of the eccentric adjusting block, power transmission and motion conversion being realized, a connecting shaft assembly hinged with the connecting rod, the connecting shaft assembly being used for connecting a target force receiving shaft, and two adjusting bolts screwed into specific threaded holes of the adjusting block mounting seat and abutting against specific parts of the eccentric adjusting block. The adjusting bolts are rotated and moved along specific directions on the adjusting block mounting seat, the spacing is adjusted by the two adjusting bolts, and thus flexible adjustment of motion parameters of the crank structure is realized.

The utility model relates to the technical field of crankshaft transmission structures, in particular to a high-precision crank pin shaft which comprises a crank connecting piece, and a first connecting sleeve is embedded in one side of the crank connecting piece. When the crank pin shaft is installed, the anti-friction layer in the crank connecting piece and the sliding block connecting sleeve at the other end of the crank pin shaft are aligned with the rotating disc and the sliding block to be installed in an embedded mode, then lubricating oil is injected into the lubricating oil bin, then the sealing cover is inserted, the sealing inserting piece seals an oil injection opening of the lubricating oil bin, and then the anti-friction layer is embedded into the rotating shaft. Then the first connecting sleeve is inserted into a groove of a crank connecting piece, a positioning rotary knob is rotated to push a movable clamping piece at the bottom end of a movable telescopic piece to slide, and the movable clamping piece is inserted into a connecting clamping groove in the side wall of the first connecting sleeve to complete clamping and fixing; the transmission rod moves to drive the sliding block connecting piece to move, and therefore the sliding block connected with the sliding block connecting sleeve is pushed to move linearly.

The invention relates to an assembly (1, 2) comprising a pin (2) and a crank (1), in particular for a turbocharger, the crank (1) having a bore (12) in which a connecting portion (21) of the pin (2) for connecting the pin (2) with the crank (1) is fixed by an interference fit, wherein the bore (12) has a substantially circular cross-section and the connecting portion (21) has a circular cross-section, the cross-section of the bore (12) deviating from the circular shape at at least one location (121) and being larger than the cross-section of the connecting portion (22) at this location (121).

An assembly of a crankshaft and a connecting rod, the crankshaft being rotatable about a crankshaft axis and comprising a crank pin (5) and a pair of crank webs (6). The connecting rod comprising a big end (10) connected to the crank pin by a big end bearing (11) located between the pair of crank webs and a small end for connecting the connecting rod to a piston. A reservoir (21) for lubricating oil being provided between the big end and the crank pin and a jetting passage (30) being provided for jetting, in use, a piston cooling jet of lubricating oil from the reservoir towards a back face of a piston connected in use to the small end of the connecting rod. The jetting passage comprising two cut-outs, a first cut-out (32) located in a side face (18) of the big end and a second cut-out (33) located in an inwardly-directed side face (19) of the crank web that faces said side face of the big end, the second cut-out defining an outlet (34) of the jetting passage. The first cut-out extends from an inner edge (36) of the side face only part way towards an outer edge (37) of the side face and the second cut-out extends from the outlet at an outer edge (38) of the inwardly-directed side face only part way towards an inner edge (39) of the inwardly-directed side face, such that the jetting passage is established when rotation of the big end about the crank pin overlaps the first cut-out with the second cut-out.

The utility model discloses a modularized crankshaft and an RV speed reducer, and belongs to the field of speed reducers. The shape memory alloy assembly is sleeved outside the central shaft; the first shaft sleeve assembly and the second shaft sleeve assembly are detachably connected outside the shape memory alloy assembly in a sleeving mode, and the first shaft sleeve assembly abuts against the second shaft sleeve assembly. The first shaft sleeve assembly and the second shaft sleeve assembly are the same in structure and each comprise a first shaft sleeve body detachably connected to the outside of the shape memory alloy assembly in a sleeving mode. And the second shaft sleeve body is sleeved outside the first shaft sleeve body. A first flat potential is arranged outside the first shaft sleeve body, a second flat potential is arranged in the second shaft sleeve body, and the first flat potential abuts against the second flat potential. The utility model has the technical effects that the modular performance is good, and the connection performance is good.

A gear motor of an electrical assistance device, in particular for a cycle, includes a gear reducer and an electric motor including a stator and a rotor integral in rotation with a shaft forming the input of the gear reducer. The gear reducer includes a toothed crown integral with the stator, a satellite-carrier fitted to pivot around the shaft, and forming the output of the gear reducer, at least two planet wheels fitted firstly on respective eccentric cams via a respective bearing. The ge ar motor also includes a rotor bearing to center a first end of the shaft on a fixed shaft of the gear motor, and a bearing device including deformable rolling elements. The bearing device is interposed between the satellite-carrier and a cylindrical receptacle which is integral with the stator, to center the shaft in the cylindrical receptacle at a second end.

The utility model provides a high oil pressure crank pin assembly, which relates to the technical field of crank pins, and comprises a crank pin, an installation disc is fixedly installed between the inner walls of the crank pin, a bowl-shaped plug is installed between the inner walls of the crank pin, the lower end of the bowl-shaped plug is attached to the upper surface of the installation disc, a positioning assembly is arranged in the bowl-shaped plug, and the positioning assembly is connected with the installation disc. The bowl-shaped plug is connected with the crank pin through a positioning assembly, a clamp spring groove is formed in the inner wall of the crank pin, and a clamp spring is arranged in the clamp spring groove. The bowl-shaped plug is installed in the crank pin, when high-pressure oil abuts against the plug, the clamp spring abuts against the plug, the high-pressure oil cannot leak, and then the assembled crank pin assembly is connected with the crank pin through the clamp spring. By means of the arrangement, the sealing performance of the crank pin oil hole is obviously improved, the rigid plug is not prone to disengaging from the plug containing section even under the high pressure condition, meanwhile, the rigid bowl-shaped plug is not prone to being affected by systematic changes of the hole diameter, and the problem that lubricating oil matched with a crankshaft assembly leaks is solved.

A crankshaft (1, 40) for an internal combustion engine including variable compression ratio comprises a main journal, a first crankpin (3a, 43a), a first and second crank web (4a, 4b, 44a, 44b) at opposite sides of the first crankpin (3a, 43a), a second crankpin (3b, 43b) and a third and fourth crank web (4c, 4d, 44c, 44d) at opposite sides of the second crankpin (3b, 43b) The crankshaft also includes a first eccentric member (6a, 45a) which is rotatably mounted on the first crankpin (3a, 43a) and a second eccentric member (6b, 45b) which is rotatably mounted on the second crankpin (3b, 43b) and a transfer shaft (19, 50) which extends through the second and third crank web (4b, 4c, 44b, 44c) and which is rotatable with respect to the second and third crank web (4b, 4c, 44b, 44c) about a transfer shaft axis. An external first transfer gear (18, 52) is fixed to the transfer shaft (19, 50) at a side of the second crank web (4b, 44b) where the first eccentric member (6a, 45a) is located and an external second transfer gear (21, 49) is fixed to the transfer shaft (19, 50) at a side of the third crank web (21, 44c) where the second eccentric member (6b, 45b) is located. The first and second eccentric members (6a, 6b, 45a, 45b) are drivably coupled to each other through the transfer shaft (19, 50). The first and second transfer gears (18, 21, 47, 48) mesh with external first and second intermediate transfer gears (17, 22, 51), respectively, which in turn mesh with the first and second eccentric member gears (10, 23, 47, 48). The first and second intermediate transfer gears (17, 22, 51) are rotatably mounted to the second and third crank webs (4b, 4c, 44b, 44c), respectively.

The bicycle crank assembly comprises a transmission middle shaft, a left crank module and a right crank module are formed at the left end and the right end of the transmission middle shaft respectively, and a bearing set is arranged at the middle end of the transmission middle shaft; the transmission middle shaft is sleeved with a pre-pressing ring close to the left crank module. Wherein the pre-pressing ring is attached to the left crank module to form an initial position; the pre-pressing ring abuts against the bearing set to form a locking position. And the jacking mechanism comprises a jacking piece and at least one guide hole formed in the left crank module, and the guide hole axially extends towards the transmission middle shaft. According to the technical scheme, the axial constraining force is applied to the pre-pressing ring, so that the pre-pressing ring is always kept at the locking position, the phenomenon that the pre-pressing ring is reversed and loosened is prevented, unnecessary cost expenditure caused by collision damage of the bicycle bottom bracket and accessories is effectively avoided, certain potential safety hazards are solved, and the safety of the bicycle is improved.

A rotary body (30) according to the present invention is made of resin and attached to a crankshaft (20). The rotary body (30) has an outside plate element (32) and an inside plate element (36) which are attached to an outside surface (24a) and an inside surface (24b) of an arm portion (24) of the crankshaft, respectively, and a pair of filler elements (34) disposed between the outside plate element and the inside plate element and on both sides of the arm portion. The outside plate element and the pair of the filler elements are coupled to each other, and the pair of the filler elements and the inside plate element are coupled to each other.

The invention provides a two-stage compression air compressor, and belongs to the technical field of air compressors. The two-stage oil-free air compressor solves the technical problems that an existing two-stage oil-free air compressor is remarkable in vibration due to unbalanced movement of a piston, fixed in output pressure and lack of adjustment flexibility. The air compressor comprises a driving motor, wherein two output shaft sections of the driving motor respectively drive two first-stage air cylinder assemblies located on the same side of the motor and two second-stage air cylinder assemblies located on the other side of the motor at the same time; the corresponding air cavities of the air cylinder assemblies on the two sides communicate with each other, and the first-stage air outlet cavity and the second-stage air inlet cavity are connected through an intercooling air pipe. Through the opposite arrangement of the two first-stage cylinders and the two second-stage cylinders and the specific phase design, reciprocating inertia force is counteracted in real time, and vibration and noise are greatly reduced; meanwhile, by means of the parallel connection characteristic of the systems on the two sides, the output pressure and power can be conveniently adjusted by controlling operation of the motor on the single side. The device has the advantages of being stable in operation, high in reliability, adjustable in pressure output and high in adaptability.

To facilitate assembly work and inhibit uneven contact between a gear shaft and a gear configured to engage with the gear shaft even if an inclination occurs between the gear shaft and the gear.SOLUTION: A compression ratio variable device 10a includes a gear shaft 52 which has a shaft 55 including a gear 51 for rotating an eccentric cam 31 and forms a power transmission member between a power source 32 and the eccentric cam 31. The shaft 55 and the gear 51 are formed separately. The shaft 55 has a spline shaft 55a, configured to fit in a spline hole 51a provided at the gear 51, at one end.SELECTED DRAWING: Figure 4

The utility model provides an eccentric mechanism of an air compressor, and belongs to the technical field of air compressors. The air compressor solves the problems that an existing air compressor is low in acting efficiency, and stress is unbalanced when a main shaft works. The eccentric mechanism of the air compressor comprises a main shaft, one end of the main shaft is sleeved with a first eccentric wheel, a second eccentric wheel, a third eccentric wheel and a fourth eccentric wheel, and the first eccentric wheel, the second eccentric wheel, the third eccentric wheel and the fourth eccentric wheel are freely and smoothly arranged in the axial direction of the main shaft. The second eccentric wheel deflects around the main shaft by an angle alpha which is larger than or equal to 0 degree and smaller than or equal to 180 degrees relative to the first eccentric wheel, the third eccentric wheel deflects around the main shaft by 180 degrees relative to the first eccentric wheel, and the fourth eccentric wheel deflects around the main shaft by 180 degrees relative to the second eccentric wheel. According to the structure, the vibration and noise of the whole machine during working are reduced, the working efficiency of the air compressor is improved, the arrangement of the four eccentric wheels on the main shaft can be changed in any sequence according to the structural design of the air compressor, and the position arrangement flexibility of the four eccentric wheels is improved.

The present invention discloses a detection method and system for the assembly process of a crank connecting rod mechanism, including: obtaining the tolerance values of the historical assembly of each component in the crank connecting rod mechanism, thereby constructing an assembly process detection library; using a hybrid clustering algorithm to cluster the assembly process detection library to determine the normal process assembly threshold and the abnormal process assembly threshold; the hybrid clustering algorithm includes optimizing each particle in the particle swarm algorithm within the decision domain range, and the decision domain range is corrected according to the ratio of the difference between the fitness values of the k-th iteration step and the k + 1-th iteration step to the fitness value of the k-th iteration step; obtaining the tolerance values of the actual assembly of each component in the crank connecting rod mechanism, and comparing them with the normal process assembly threshold and the abnormal process assembly threshold to determine the normal or abnormal state of the assembly process of the crank connecting rod mechanism, effectively improving the engine assembly accuracy.

The utility model relates to the technical field of robots, and discloses a crank, a transmission structure of a biped robot, a humanoid robot and a robot. According to the transmission crank, the mounting groove is formed in the shaft section, the bearing is assembled in the mounting groove through the outer ring, and the end, away from the joint module, of the crank is dynamically supported through the bearing. According to the embodiment, the mounting groove is formed in the shaft section of the crank, so that the bearing can be directly mounted in the mounting groove of the crank shaft section instead of being sleeved outside the shaft section of the supporting piece. The cost of the transmission crank can be reduced.

The utility model discloses an eccentric wheel structure which comprises an upper ring body and a lower ring body, the upper ring body is arranged above the lower ring body, a connecting hole is formed in the center of the upper ring body and the center of the lower ring body, an outer ring on one side of the upper ring body is a perfect circular arc, an outer ring on the other side of the upper ring body is a non-perfect circular arc, and a semicircular disc-shaped protruding block corresponding to the non-perfect circular arc is arranged on the lower ring body. A plurality of grooves are formed in the connecting hole; the whole body is integrally formed through metal powder sintering. The eccentric wheel is reasonable and ingenious in structural design, the integrally-formed structure is high in structural strength, the contact face of the connecting part is increased due to superposition of the upper ring body and the lower ring body, the eccentric wheel is not prone to deformation, and the performance of the eccentric wheel is improved.

An adjustment device (4) is connected to a transmission device (33) of a thread rolling machine (3). The transmission device (33) includes an eccentric wheel (332) and a transmission shaft (333). The adjustment device (4) includes a drive assemblage (42) and a worm assemblage (43) linked with the transmission shaft (333). The worm assemblage (43) includes a worm shaft (431) meshed with the drive assemblage (42) and a regulating unit (433) disposed on the worm shaft (431). The drive assemblage (42) includes a first drive unit (421) disposed on a first shaft end (333A) of the transmission shaft (333) and defining a positioning portion (422) whose center is situated away from a center of the first drive unit (421) to present an eccentric arrangement. Accordingly, the cooperation between the drive assemblage (42) and the worm assemblage (43) allows a thread-rolling distance applied to the thread rolling machine (3) to be easily and precisely adjusted.

An assembly of a connecting rod and a crankshaft including a pair of crank webs 6 and a crank pin 5. A reservoir 21 for lubricating oil between a big end 10 of the conrod and the crank pin, and a jett

The utility model relates to the technical field of compressors, and discloses a crankshaft of a reciprocating compressor, which comprises a main journal, balance blocks are fixedly mounted on two sides of the main journal, a first piston rod journal is fixedly mounted on one side, far away from the main journal, of each balance block, and a second connecting handle is fixedly mounted on one side, far away from the corresponding balance block, of each first piston rod journal. A crank is fixedly installed on the side, away from the first piston rod journal, of the second connecting handle, and a second piston rod journal is fixedly installed on the side, away from the second connecting handle, of the crank. Through cooperative use of an oil liquid injection groove and an oil liquid storage groove, the outer edges of the first piston rod journal and the second piston rod journal need to be lubricated, so that when the first piston rod journal and the second piston rod journal are slidably connected with the piston rod in a sleeving mode more smoothly, the first piston rod journal and the second piston rod journal need to be lubricated before the first piston rod journal and the second piston rod journal are not connected with the piston rod; lubricating oil is poured into the inner wall of the oil storage tank through the oil injection tank.

The utility model discloses an eccentric wheel structure of a fireproof spraying machine, which comprises a spraying machine shell, a hyperboloid gear reducer arranged in the spraying machine shell, two side plate brackets arranged on one side in the spraying machine shell, a first rotating shaft rotationally connected between the two side plate brackets through a bearing, and an eccentric wheel fixedly connected on the rotating shaft, a strip-shaped through groove is formed in the side plate support, rolling bearings are arranged in the strip-shaped through groove, a second rotating shaft is rotationally connected between the two rolling bearings, a coupling sleeve is fixedly connected to the second rotating shaft, and the position, away from the first rotating shaft, of the eccentric wheel is connected with the second rotating shaft. A plunger rod is arranged at the bottom of the coupling sleeve; the spraying device has the advantages that the eccentric wheel is driven to rotate through the double-curved-surface gear reducer, so that the second rotating shaft reciprocates up and down in the strip-shaped through groove, the plunger rod is driven to reciprocate, opening and closing of the valve can be more accurately controlled, and starting and stopping of spraying are accurately adjusted.

An adjustable transmission element (1) comprises a drive motor (2) provided with a rotating shaft (3) associated with a crank (4) which in turn is pivoted to a first end (5a) of a link rod (5) which has a second end (5b) which is pivoted to a sliding sled (6). An adjustable interconnection apparatus (8) is interposed between the shaft (3) of the motor (2) and the crank (4) and comprises: at least one cylindrical body (9), integral with the shaft (3), provided with first coupling means (10) and with at least one protruding stem (11) which is parallel to the shaft (3) and can move along a substantially radial stroke along the end face (9a) of the cylindrical body (9); at least one bell (13) provided with a cavity (14) with a shape substantially complementary to that of the cylindrical body (9), for its accommodation, and with second coupling means (15), complementary to the first coupling means (10), for the mechanical connection of the bell (13) to the cylindrical body (9) in a mutually coupled configuration. The bell (13) comprises a slot (16) in its end face which is substantially a spiral, regular or irregular, and is configured to accommodate the protruding stem (11). At least one actuator (17) configured for the translation of the bell (13) between a first configuration of partial separation from the cylindrical body (10), in which the first coupling means (10) and the second coupling means (15) are mutually facing, proximate, and not in mutual contact, and a second configuration of maximum proximity to the cylindrical body (9), in which the first coupling means (10) and the second coupling means (15) are in mutual contact, rendering the cylindrical body (9) and the bell (13) integral.

The invention discloses an eccentric wheel structure and an air compressor, and belongs to the technical field of air compressors, the eccentric wheel structure comprises a circular first mounting part (1), and a first through hole (11) is formed in the position, deviating from the circle center, in the first mounting part (1); a second through hole (212) which coincides with and communicates with the axis of the first through hole (11) is formed in the second mounting part (2), one end of the second mounting part (2) is fixedly connected with the first mounting part (1) in the axis direction of the rotor shaft, and the other end of the second mounting part (2) is fixedly connected with the third mounting part (3) in the radial direction of the rotor shaft or is integrally formed with the third mounting part (3); the third mounting part (3) is formed into a sector ring shape and is used for a counterweight part of the eccentric wheel structure; the projection area of the second installation part (2) is located on the lower portion of the first installation part (1), and the projection area of the second installation part (2) is 60%-80% of the area of the first installation part (1). The gravity center of the eccentric wheel deviates in the direction of the third installation part, the mass center of the balance weight part is farther away from the rotation center, relative rotation inertia force is increased, the inertia force is improved, preparation materials are saved, and occupied space is reduced.

The invention discloses a driving device (10) for output movement of a displacement element. The driving device comprises a connecting rod (12) connected with the displacement element. The drive device (10) comprises a crank (22) and an eccentric unit (26). According to the invention, the eccentric unit (26) has a mechanical setting device (36) comprising a setting element (38) acting on the eccentric element (40), the setting device (36) being configured such that the setting element (38) can be in different setting positions, for example in different positions and / or orientations, with respect to the crank axis of rotation, the setting element (38) being lockable in the setting positions, for example in different positions and / or orientations. And the eye-shaped bearing shaft (ALA) is assigned to a set position around the rotation track of the crank rotation shaft (KDA).

The utility model provides a high rotation speed chain saw type crankshaft connecting rod assembly, which comprises a left crank, a right crank, a crank pin, a bearing and a connecting rod, the left crank and the right crank are respectively provided with a left fixing hole and a right fixing hole, and two ends of the crank pin are respectively fixed in the left fixing hole and the right fixing hole. The crank mechanism further comprises organic friction plates used for abutting against the side wall of the connecting rod, the organic friction plates are fixedly arranged on the crank pin in a sleeved mode, the two organic friction plates are located on the left side and the right side of the connecting rod respectively, and the purpose that severe abrasion is not prone to being generated between the connecting rod and the left crank or the right crank is achieved.

The utility model relates to the technical field of crankshafts, in particular to a crankshaft of a double-cylinder outboard engine, which comprises a first crank throw and a second crank throw, the first crank throw comprises a first crank wall A and a first crank wall B, the first crank wall B is arranged on one side of the first crank wall A, and first inserting columns are arranged on one side of the first crank wall A and one side of the first crank wall B; the first crank wall A and the first crank wall B are connected together through a first connecting sleeve and a first inserting column to form a complete first crank throw, the second crank wall A and the second crank wall B form a complete second crank throw through a second connecting sleeve and a second inserting column, and the first crank throw and the second crank throw are installed together through a crank neck sleeve and a short butt joint column. The front end shaft is installed on one side of the first crank throw through the second butt-joint groove and the long butt-joint column, the rear end shaft is installed on one side of the second crank throw through the first butt-joint groove and the middle butt-joint column, installation and disassembly are convenient, and the rear end shaft can be independently disassembled to be replaced.

Provided is a sliding member capable of stably reducing the frictional resistance of a sliding surface accompanying eccentric rotation. A sliding member (7) is in the shape of a circular ring in which a high-pressure fluid and a low-pressure fluid exist on the inner and outer surfaces, has a sliding surface (7a) that slides in opposition to each other accompanying eccentric rotation, and in which a plurality of high-pressure grooves (71) that open to a space (50) in which the high-pressure fluid exists and a plurality of low-pressure grooves (72) that open to a space (20) in which the low-pressure fluid exists are respectively provided on the sliding surface (7a) in the circumferential direction.

The present invention discloses an eccentric sleeve with an eccentric amount adjustment structure, which includes an eccentric sleeve main body and an assembly ring. An internal thread is provided inside the eccentric sleeve main body, and an assembly ring is installed at the front end of the eccentric sleeve main body. A light hole is provided inside the assembly ring, a left arc block is installed on the left side of the assembly ring, a right arc block is installed on the right side of the assembly ring, and a rivet is installed above the right arc block. An assembly base is installed above the assembly ring, a positioning rod is installed below the assembly base, a fixed pin is installed inside the assembly base, and a sliding rod is installed above the assembly base. An eccentric block is installed above the sliding rod, and a sliding groove is provided inside the eccentric block. In this eccentric sleeve with an eccentric amount adjustment structure, by setting the fixed pin, the assembly base can be replaced, and the sliding rod can adjust the position of the eccentric block. Through the cooperation of the two, the eccentric amount of the device can be accurately adjusted.

The embodiment of the invention provides an adjustable eccentric wheel and an automobile sling for an assembly line, the adjustable eccentric wheel comprises a wheel body, a wheel shaft and a positioning ring, the wheel shaft comprises a concentric shaft and an eccentric positioning shaft, the concentric shaft is coaxially sleeved on the inner side of the wheel body, the eccentric positioning shaft is fixedly connected with the concentric shaft, and the axis of the eccentric positioning shaft and the axis of the concentric shaft are arranged in parallel according to a preset distance; the outer side surface of the eccentric positioning shaft is a regular polygon; a positioning hole used for containing the eccentric positioning shaft is formed in the positioning ring, and the inner side face of the positioning hole is a regular polygon matched with the outer side face of the eccentric positioning shaft. By the adoption of the technical scheme, rigid limiting can be formed through the polygonal matching mode between the eccentric positioning shaft and the positioning ring, the problem that the eccentric shaft is difficult to position and consequently frequent rotation is caused is solved, and therefore normal operation of a production line is guaranteed.

The improved driving device for the washing tower comprises a motor, a speed reducer and an eccentric wheel assembly, one side of the eccentric wheel assembly is connected with an adjusting support a, a seat frame and a rolling bearing seat, the other side of the eccentric wheel assembly is connected with the motor through a pin coupling a, and the motor and the speed reducer are connected together through a pin coupling b. The eccentric wheel assembly comprises eccentric wheels, an eccentric shaft and a balancing weight, a rolling bearing is arranged on the eccentric shaft, the eccentric wheels are symmetrically installed on the two sides of the rolling bearing, three rows of holes are symmetrically formed in the eccentric shaft, and the balancing weight is connected through the three rows of holes. The eccentric wheel assembly is arranged on the driving device, the eccentric wheels are symmetrically arranged, so that the torque on the eccentric shaft is in a static balance state, the output torque of the speed reducer is stable, the tooth hitting phenomenon of a low-speed end gear disappears, the driving device does not generate other noise except the noise of the motor and the speed reducer, and the load requirement of the motor is stable; the motor current is stable.