CN113715936A

CN113715936A - Forklift steering axle assembly production line

Info

Publication number: CN113715936A
Application number: CN202110955670.9A
Authority: CN
Inventors: 吴斌; 王杰; 郭顺; 叶俊; 左改兵
Original assignee: Anqing Heli Axle Co ltd
Current assignee: Anqing Heli Axle Co ltd
Priority date: 2021-04-30
Filing date: 2021-08-19
Publication date: 2021-11-30
Anticipated expiration: 2041-08-19
Also published as: CN113147960A; CN113715936B

Abstract

The invention provides a forklift steering axle assembly production line, which comprises a portal frame and also comprises: the conveying line body is used for conveying the steering axle to move in sequence along the assembling process; the oil cylinder assembling station is used for installing the oil cylinder on the bridge body; the needle bearing assembling station presses the needle bearing on the bridge body through a bearing press suspended on the portal frame; the steering knuckle assembling station is used for connecting the steering knuckle with the bridge body and the oil cylinder; and a hub assembly station for mounting the hub assembly at the knuckle. The bridge body conveying device utilizes the conveying line body to convey the bridge body along different procedures, namely the bridge body is conveyed to the oil cylinder assembling station, the needle bearing assembling station, the steering knuckle assembling station and the hub assembling station in sequence to realize the assembly of corresponding parts, and the bridge body conveying device has the advantages of convenience in bridge body conveying and low labor intensity.

Description

Forklift steering axle assembly production line

Technical Field

The invention relates to the technical field of forklift steering axle production, in particular to a forklift steering axle assembly production line.

Background

The forklift is various wheel type carrying vehicles for loading, unloading, stacking and short-distance transportation of finished pallet goods, is widely applied to various departments of national economy such as stations, ports, airports and the like, and is efficient equipment for mechanized loading, unloading, stacking and short-distance transportation. The steering axle is one of main parts of the forklift, and mainly functions in deflecting a steering wheel so as to realize a steering function. The existing steering axle generally comprises an axle body, a steering oil cylinder, a needle bearing, a steering knuckle master pin, a connecting rod, a wheel hub and other parts, the steering axle assembly process in the prior art mostly adopts the axle body as a basis, and the parts are manually assembled on the axle body.

Disclosure of Invention

The invention provides a steering axle assembly production line which can realize smooth movement of a steering axle body between assembly processes, is convenient for carrying and hanging the steering axle body and is beneficial to reducing the labor intensity of workers.

In order to solve the technical problems, the invention adopts the following technical scheme:

the utility model provides a fork truck steer axle assembly line, includes the portal frame, still includes:

the conveying line body is used for conveying the steering axle to move in sequence along the assembling process;

the oil cylinder assembling station is used for installing the oil cylinder on the bridge body;

the needle bearing assembling station presses the needle bearing on the bridge body through a bearing press suspended on the portal frame;

the steering knuckle assembling station is used for connecting the steering knuckle with the bridge body and the oil cylinder; and

and the hub assembling station is used for installing the hub assembly on the steering knuckle.

Preferably, the portal frame includes the frame, sets up the KBK hoist that is used for the transport at the frame top, the KBK hoist is including setting up the KBK track at the frame top, can follow the walking wheel of KBK track removal, set up the electric block who is used for transporting on walking the wheel.

Preferably, the conveying line body comprises a rack, speed-multiplying chain body layers arranged on the rack in a layered mode, a line body motor used for driving the speed-multiplying chain body to work and an assembling tray capable of moving along the speed-multiplying chain body and used for placing the bridge body.

Preferably, the speed-multiplying chain line body comprises two chain support guide rails distributed along the length direction of the rack, a speed-multiplying chain arranged on the chain support guide rails in a transmission manner, and a chain wheel arranged at the end part of the chain support guide rails and used for chain transmission, and the output end of the line body motor is connected with the chain wheel.

Preferably, the assembly tray comprises a bottom plate, a tray rotatably arranged at the top of the bottom plate, and two V-shaped blocks oppositely arranged along the axis of the tray and used for placing the bridge body.

Preferably, the four corners of the bottom plate are also rotatably connected with moving wheels which can move along the inner wall of the chain support guide rail; and the top of at least one corner of the bottom plate is also provided with an indexing component for fixing the tray, and indexing blocks matched with the indexing component are uniformly distributed on the tray.

Preferably, the indexing assembly comprises an installation block rotatably arranged at the top of the bottom plate, a limiting block arranged at one end, close to the tray, of the installation block and a first handle used for driving the installation block to rotate, and a limiting groove matched with the limiting block is formed in the indexing block.

Preferably, the side wall of the rack is provided with a stop mechanism corresponding to the assembly station and used for limiting the assembly tray at the installation station, and the stop mechanism comprises a stop cylinder arranged at the installation station of the rack through a cross rod and a stop block arranged at the output end of the stop cylinder and used for stopping the movement of the assembly tray.

Preferably, both ends still are equipped with the non return mechanism that is used for preventing assembly tray retrograde motion around the frame, non return mechanism includes through the non return cylinder of horizontal pole setting at the frame lateral wall and set up the non return piece that is used for blockking assembly tray removal at the non return cylinder output.

Preferably, the head end and the tail end of the conveying line body are also provided with lifting mechanisms used for transferring and assembling trays between layered double-speed chain body, and each lifting mechanism comprises a workbench and a lifting table capable of vertically displacing along the workbench through a lifting slide rail; a proximity switch used for sensing whether the assembly tray is in place or not is arranged at one end, close to the speed multiplying chain body, of the workbench, a blocking device used for controlling the assembly tray to pass is further arranged at one end, close to the speed multiplying chain body, of the workbench, and the blocking device comprises a blocking cylinder arranged on the workbench and a blocking rod arranged at the output end of the blocking cylinder; the elevating platform includes main body frame, interval setting and is used for assembling the transport roller axle that the tray was carried and be used for driving transport roller axle pivoted driving motor between main body frame.

Preferably, the production line further comprises a press-fitting mechanism for mounting the knuckle bearing of the steering axle oil cylinder, and the press-fitting mechanism comprises a press-fitting table, a material rest arranged at the top of the press-fitting table, a press arranged on two sides of the material rest and in an L shape, a positioning tool capable of moving along the horizontal part of the press through a slide rail, second lower pressing heads arranged on two sides of the positioning tool, a pressurizing cylinder arranged at the top end of the vertical part of the press, and second upper pressing heads arranged at the output end of the pressurizing cylinder and used for press-fitting.

Preferably, the bearing press includes the base plate, sets firmly the hydro-cylinder mounting panel in the base plate top, sets firmly the hoist and mount board in hydro-cylinder mounting panel top and set firmly the pressure equipment board in base plate below and layering setting, the base plate is equipped with the last pressure head that can telescopically remove through the spring, two pressure equipment board top is equipped with well pressure head, pressure head one down respectively, hydro-cylinder mounting panel top is equipped with the actuating cylinder that is used for driving the flexible removal of pressure head, the base plate both sides are equipped with the handle two that this bearing press of drive removed.

Preferably, the production line further comprises a steering axle hub parallelism online detection station located at the discharging end, the online detection station comprises a frame base arranged on two sides of the speed-multiplying chain line body, a gantry frame arranged at the top of the frame base, a pressing cylinder arranged at the top of the gantry frame and used for pressing a workpiece, a centering tool used for being installed on the hub of the bridge body, a centering pressurizing cylinder arranged on the side wall of the gantry frame and the output end of the centering pressurizing cylinder extending into the gantry frame, a centering pressure head arranged at the output end of the centering pressurizing cylinder, and two sensors arranged on the end face of the centering pressure head and used for detecting the parallelism of the hub in a centering state, and a lifting cylinder used for lifting an assembly tray is further arranged at the top of the frame base.

Preferably, knuckle assembly station and wheel hub assembly station still include the manual turning device who is used for the upset pontic, manual turning device is including hanging in midair in the upset roof of portal frame, rotate the two link assemblies that set up at upset roof both ends and rotate each other and connect and rotate the clamp sleeve that sets up the fore-and-aft elliptic cylinder of centre gripping pontic inboard in two link assemblies bottom.

Preferably, the turnover top plate is connected with the portal frame through a horizontal rotating joint arranged at the top of the turnover top plate in a rotating mode, the connecting rod assembly comprises a first connecting rod and a second connecting rod, the first connecting rod is connected with the turnover top plate in a rotating mode, one end of the second connecting rod is connected with the second connecting rod in a rotating mode, the middle of the second connecting rod is hinged to the second connecting rod in a hinged mode, a driving handle is further arranged on the side wall of the other end of the second connecting rod, and the clamping sleeve is connected with the second connecting rod in a rotating mode through a vertical rotating joint.

According to the technical scheme, the invention has the following beneficial effects:

1. according to the invention, the bridge body is conveyed along different procedures by utilizing the conveying line body, namely, the assembly of corresponding parts is realized in sequence when the bridge body is conveyed to the oil cylinder assembly station, the needle bearing assembly station, the steering knuckle assembly station and the hub assembly station in sequence, and the bridge body conveying device has the advantages of convenience in bridge body carrying and low labor intensity.

2. According to the invention, the layered speed-multiplying chain body is arranged, the lifting mechanisms for realizing the transportation of the assembly tray are arranged on two sides of the speed-multiplying chain body, the bridge body moves along the upper-layer line body through the assembly tray for assembly, the bridge body is off-line after the assembly is finished, the assembly tray is transported to the lower-layer line body under the driving of the lifting mechanisms, and the return stroke is realized, so that the assembly tray can be recycled.

3. According to the invention, the device for detecting the parallelism of the steering axle hub is arranged, so that the assembly precision of the hub is improved; in addition, set up manual turning device at knuckle assembly station and wheel hub assembly station to when carrying out the part installation respectively to the pontic both sides, the level and the vertical direction rotation of pontic are realized to usable this manual turning device, assemble with the convenience to the pontic both sides.

Drawings

FIG. 1 is a schematic view of the various assembly stations of the present invention;

FIG. 2 is a schematic view of a gantry;

FIG. 3 is a schematic view of the body frame of FIG. 1;

FIG. 4 is a schematic view of a conveyor line body;

FIG. 5 is a schematic view of an assembly tray;

FIG. 6 is a schematic view of the stop mechanism;

FIG. 7 is a schematic view of a check mechanism;

FIG. 8 is a schematic view of a lift mechanism;

FIG. 9 is a top view of FIG. 8;

FIG. 10 is a schematic view of portion A of FIG. 9;

FIG. 11 is a schematic view of a bearing press;

FIG. 12 is a top view of FIG. 11;

FIG. 13 is a schematic view of section C-C of FIG. 12;

FIG. 14 is a schematic view of a bearing press and a speed multiplying link;

FIG. 15 is a schematic view of a cylinder knuckle bearing press-fit mechanism;

FIG. 16 is a front view of FIG. 15;

FIG. 17 is a side view of FIG. 15;

FIG. 18 is a top view of FIG. 15;

FIG. 19 is a schematic view of portion B of FIG. 15;

FIG. 20 is a schematic view of an on-line hub parallelism detecting device;

FIG. 21 is a front view of FIG. 20;

FIG. 22 is a schematic view of portion C of FIG. 20;

FIG. 23 is a schematic view of the manual flipping mechanism coupled to the speed doubling chain;

FIG. 24 is a schematic view of a manual flipping mechanism;

FIG. 25 is a schematic view of a vertical rotary joint;

fig. 26 is a schematic cross-sectional view of D-D in fig. 25.

In the figure: 10. a gantry; 11. a frame; 12. a KBK crane; 13. a KBK track; 14. a traveling wheel; 15. an electric hoist; 20. a conveyor line body; 210. a frame; 220. a speed doubling chain body; 221. a chain supporting the guide rail; 222. a speed doubling chain; 230. a linear motor; 240. assembling a tray; 241. a base plate; 242. a tray; 243. a V-shaped block; 244. a moving wheel; 245. an indexing assembly; 2451. mounting blocks; 2452. a limiting block; 2453. a first handle; 246. a dividing block; 2461. a limiting groove; 250. a stop mechanism; 251. a stop cylinder; 252. a blocking block; 260. a non-return mechanism; 261. a non-return cylinder; 262. a check block; 270. a lifting mechanism; 271. a work table; 272. lifting the slide rail; 273. a lifting platform; 2731. a main body frame; 2732. a conveying roller shaft; 2733. a drive motor; 274. a proximity switch; 275. a blocking device; 2751. a blocking cylinder; 2752. a blocking lever; 30. an oil cylinder assembling station; 40. a needle bearing assembly station; 50. a bearing press; 51. a substrate; 52. an oil cylinder mounting plate; 53. hoisting the plate; 54. pressing and mounting the plate; 55. a first upper pressure head; 56. a medium pressure head; 57. pressing the first pressing head; 58. a driving oil cylinder; 59. a second handle; 591. a switch pressing plate; 60. a knuckle assembly station; 70. a hub assembly station; 80. a press-fitting mechanism; 81. a press mounting table; 82. a material rack; 83. a press; 84. a slide rail; 85. positioning a tool; 86. a second lower pressure head; 87. a booster cylinder; 88. an upper pressure head II; 90. a hub parallelism online detection station; 91. a frame base; 92. a gantry frame; 93. a pressing cylinder; 94. righting the tool; 941. assembling a plate; 942. clamping; 95. righting the pressure cylinder; 951. righting the pressure head; 96. a sensor; 100. a manual turning device; 101. turning over the top plate; 102. a connecting rod assembly; 1021. a first connecting rod; 1022. a second connecting rod; 103. a clamping sleeve; 104. a horizontal swivel joint; 105. and a vertical rotary joint.

Detailed Description

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

Example (b):

referring to fig. 1, a fork truck steer axle assembly line includes portal frame 10, still includes:

a conveyor line body 20 for conveying the steering axle to move in sequence along the assembly process;

an oil cylinder assembling station 30, which is used for installing the oil cylinder on the bridge body;

a needle bearing assembly station 40 for pressing the needle bearing to the bridge through a bearing press 50 suspended from the gantry;

a knuckle assembly station 60 for connecting the knuckle with the axle body and the oil cylinder; and

the hub assembling station 70 is used for installing a hub assembly on the steering knuckle, and when the hub assembling station is used, the bridge body sequentially moves according to an assembling procedure through the conveying line body, namely, the bridge body sequentially passes through the oil cylinder assembling station, the needle bearing assembling station, the steering knuckle assembling station and the hub assembling station to be installed on the upper part of the bridge body.

Referring to fig. 2 and 3, as a preferred technical solution of the present invention, the gantry 10 includes a frame 11 and a KBK crane 12 disposed at the top of the frame for transportation, and the KBK crane includes a KBK rail 13 disposed at the top of the frame, a traveling wheel 14 capable of moving along the KBK rail, and an electric hoist 15 disposed on the traveling wheel for transportation, so that the traveling wheel drives the electric hoist to move during the movement along the KBK rail, and thus, the electric hoist hoists an auxiliary tool for assembling parts, so as to move the auxiliary tool to a proper position of the bridge.

In the invention, the whole assembly procedure is as follows, firstly, the bridge body is on line, the oil cylinder is provided with the joint bearing, then the bridge body is conveyed to the oil cylinder assembly station 30 along with the assembly tray 240, and the oil cylinder is manually arranged on the bridge body through the bolt; then the needle bearing is mounted on the bridge at a needle bearing mounting station 40; the axle then moves to a knuckle assembly station 60, the kingpin is installed between the axle and the knuckle, then the connecting rod is installed between the knuckle and the cylinder, and finally the wheel hub assembly is installed in a wheel hub assembly station 70.

Referring to fig. 4, as a preferred embodiment of the present invention, the conveyor line body 20 includes a frame 210, a speed-doubling chain body 220 layered on the frame 210, a line body motor 230 for driving the speed-doubling chain body to work, and an assembly tray 240 capable of moving along the speed-doubling chain body and for placing a bridge body, so that the line body motor drives the speed-doubling chain body to perform transmission, thereby driving the assembly tray to move along the line body, so as to achieve the purpose of transferring workpieces between different stations.

Further, doubly fast chain body 220 includes two chain support guide rails 221 that distribute along frame 210 length direction, the transmission sets up doubly fast chain 222 on chain support guide rail and sets up and be used for chain drive's sprocket at this chain support guide rail tip, and line body motor 230 output links to each other with the sprocket, and is concrete, and line body motor passes through the sprocket drive doubly fast chain and carries out the transmission along chain support guide rail to reach and transport the assembly tray.

Referring to fig. 5, as a preferred embodiment of the present invention, an assembly tray 240 may be placed on top of the chain, and the assembly tray includes a bottom plate 241, a tray 242 rotatably placed on top of the bottom plate, and two V-shaped blocks 243 oppositely disposed along an axis of the tray for placing the bridge, whereby the tray may be rotated along the bottom plate to rotate the tray to a position suitable for installation, and the bridge is supported by the two V-shaped blocks.

Further, moving wheels 244 which can move along the inner wall of the chain support rail 221 are rotatably connected to four corners of the bottom plate 241; at least one corner top of bottom plate 241 still is equipped with the index subassembly 245 that is used for fixed tray, and the equipartition has the index piece 246 that matches with the index subassembly on the tray 242, and is concrete, take this embodiment as an example, the index piece sets up to four along the equipartition of tray circumference, and the tray can be along the bottom plate rotation 90 multiples like this to realize the rotation of pontic, in addition, can utilize the index subassembly to fix the tray after the tray is rotatory.

Further, the indexing assembly 245 comprises an installation block 2451 arranged at the top of the bottom plate in a rotating mode, a limit block 2452 arranged at one end, close to one end of the tray, of the installation block and a first handle 2453 used for driving the installation block to rotate, a limit groove 2461 matched with the limit block is formed in the indexing block 246, and before rotation, the limit block is driven by the first handle to be separated from the limit groove, so that the tray can freely rotate along the bottom plate, and after the tray rotates to a proper position, the limit of the tray can be achieved by arranging the first handle drive limit block in the limit groove.

Referring to fig. 6, as a preferred technical solution of the present invention, a stopping mechanism 250 corresponding to an assembly station and limiting an assembly tray 240 at an installation station is provided on a side wall of a frame 210, and the stopping mechanism includes a stopping cylinder 251 provided at the installation station of the frame through a cross bar and a blocking block 252 provided at an output end of the stopping cylinder and used for blocking the movement of the assembly tray, and thus, a stopping mechanism is provided at each assembly station, so that when the assembly tray moves to the station along with a double-speed chain line body, the blocking block is driven by the stopping cylinder to extend, and the position of the assembly tray is limited.

Referring to fig. 7, as a preferred embodiment of the present invention, the front and rear end portions of the frame 210 are further provided with a backstop mechanism 260 for preventing the assembly tray 240 from moving backwards, the backstop mechanism includes a backstop cylinder 261 disposed on the side wall of the frame through a cross bar and a backstop 262 disposed at the output end of the backstop cylinder for stopping the movement of the assembly tray, so that the backstop is pushed by the backstop cylinder to extend after the assembly tray moves to the double-speed link body, thereby preventing the assembly tray from moving backwards.

Referring to fig. 8, 9 and 10, as a preferred technical solution of the present invention, the conveyor line body 20 is further provided with a lifting mechanism 270 at the head and tail ends thereof for transferring and assembling trays between layered double-speed chain bodies, the lifting mechanism includes a working platform 271 and a lifting platform 273 capable of vertically displacing along the working platform via a lifting slide rail 272, and specifically, the working platform may be provided with a screw mechanism for driving the lifting platform to move; a proximity switch 274 used for sensing whether the assembly tray 240 is in place or not is arranged at one end, close to the speed-multiplying chain body, of the workbench, a blocking device 275 used for controlling the assembly tray to pass is further arranged at one end, close to the speed-multiplying chain body, of the workbench, the blocking device comprises a blocking cylinder 2751 arranged on the workbench and a blocking rod 2752 arranged at the output end of the blocking cylinder, and specifically, after the bridge body is assembled, the assembly tray of the upper speed-multiplying chain body is transported to the lower layer, the assembly tray is conveyed from the speed-multiplying chain body, the blocking cylinder drives the blocking rod to contract and expand, the assembly tray enters the lifting platform, after the proximity switch senses that the assembly tray is in place, namely after the proximity switch senses that the rear end of the assembly tray completely enters the lifting platform, the blocking cylinder drives the blocking rod to extend out of the blocking tray, the assembly tray is prevented from sliding out of the lifting mechanism, the lifting platform moves down along the lifting slide rail and reaches the lower layer, the blocking rod is retracted, and the assembling tray moves into the lower-layer line body along the lifting table; the principle that the assembly tray is transferred from the lower-layer wire body to the upper-layer wire body is the same as the principle; therefore, the lifting mechanism can be used for realizing the reuse of the assembly tray.

Further, proximity switch is used for the perception whether to target in place the assembly tray, arrives in advance when the perception to the assembly tray, and proximity switch senses the assembly tray front end promptly and gets into the workstation, and when the elevating platform did not yet target in place, restricts the assembly tray through blocking device earlier, treats that the elevating platform reachs the assigned position after, blocking device puts down, and the assembly tray continues to move ahead, reachs elevating platform department to prevent that the assembly tray from droing from the line body.

In addition, the lifting platform 273 of the present invention includes a main body frame 2731, conveying rollers 2732 spaced between the main body frame for conveying the assembly tray 240, and a driving motor 2733 for driving the conveying rollers to rotate, and specifically, a conveying belt for transmission is disposed between the conveying rollers during actual use, so that the conveying rollers are driven by the driving motor to rotate, thereby conveying the assembly tray thereon.

Referring to fig. 15, 16, 17, 18 and 19, as a preferred technical solution of the present invention, the production line further includes a press-fitting mechanism 80 for installing a knuckle bearing of a steering axle oil cylinder, the press-fitting mechanism includes a press-fitting table 81, a material shelf 82 disposed at the top of the press-fitting table, a press 83 disposed at two sides of the material shelf and in an L shape, a positioning tool 85 capable of moving along a horizontal portion of the press through a slide rail 84, a second lower press head 86 disposed at two sides of the positioning tool, a pressure cylinder 87 disposed at the top end of a vertical portion of the press, and a second upper press head 88 disposed at an output end of the pressure cylinder for press-fitting, during actual use, an air cylinder for driving the positioning tool to move may be further disposed on the press, before the oil cylinder is assembled, the knuckle bearing of the oil cylinder is first installed, specifically, the oil cylinder is placed on the positioning tool and positioned through the second lower press head, the air cylinder drives the positioning tool to move along the slide rail to a position below the second upper press head, the upper pressure head II is driven by the pressure cylinder to press the joint bearings into the bearing holes at the two ends of the oil cylinder, so that the joint bearings at the two sides of the oil cylinder are simultaneously pressed, and the improvement of the working efficiency is facilitated.

Referring to fig. 11, 12, 13 and 14, as a preferred technical solution of the present invention, a bearing press 50 includes a base plate 51, a cylinder mounting plate 52 fixed above the base plate, a lifting plate 53 fixed above the cylinder mounting plate, and a pressing plate 54 fixed below the base plate and arranged in layers, the base plate is provided with a first upper pressing head 55 capable of moving telescopically through a spring, the tops of the two pressing plates are respectively provided with a first middle pressing head 56 and a first lower pressing head 57, the top of the cylinder mounting plate is provided with a driving cylinder 58 for driving the first upper pressing head to move telescopically, two sides of the base plate are provided with a second handle 59 for driving the bearing press to move, in addition, two side walls of the handle are further provided with a switch pressing plate 591 for triggering the pressing action of the driving cylinder, in a specific use process, the bearing press is arranged on a gantry and lifted by a KBK crane 12, and needle bearings are respectively placed on the first middle pressing head and the first lower pressing head, holding the second handle to enable the first upper pressure head to be positioned in a needle roller bearing hole of the bridge body for pre-guiding, holding the switch pressing plate, driving the oil cylinder to start, and simultaneously pressing and mounting the two needle roller bearings in place, thereby being beneficial to improving the working efficiency; in addition, the bearing press is suspended on the portal frame through the crane, so that the labor intensity of workers is favorably reduced.

Referring to fig. 20, fig. 21 and fig. 22, as a preferred technical solution of the present invention, the production line further includes an online detecting station 90 for detecting the parallelism of the hub of the steering axle, the online detecting station is disposed at the discharging end of the production line and is used for detecting the quality of the product, the online detecting station includes a frame base 91 disposed at two sides of the speed-doubling chain body 220, a gantry frame 92 disposed at the top of the frame base, a pressing cylinder 93 disposed at the top of the gantry frame and used for pressing the workpiece, a centering tool 94 for being mounted on the hub of the steering axle, a centering pressure cylinder 95 disposed at the side wall of the gantry frame and having its output end extended into the gantry frame, a centering pressure head 951 disposed at the output end of the centering pressure cylinder, and two sensors 96 disposed at the end face of the centering pressure head and used for detecting the parallelism of the hub in the centering state, a lifting cylinder for lifting the assembly tray 240 is further disposed at the top of the frame base 91, and in addition, the frock of righting includes frock board 941 and clamp 942, and this clamp realizes clamping action through the cylinder drive, during the use, the assembly tray takes the work piece to get into the detection station, stop mechanism keeps off it and stops, the artifical frock of righting that will match with the work piece dress is on work piece wheel hub, and fix through the clamp, and then lift the cylinder and will assemble the tray jack-up, two pressure cylinders on the gantry frame stretch out, compress tightly the work piece, the pressure head of righting stretches out on the pressure cylinder of righting, the frock board of righting and wheel hub, wheel hub is right the back, detect through the sensor and right the clearance between frock board and the head of righting, clearance numerical value is wheel hub for the depth of parallelism of the pressure head of righting, it can judge whether satisfy the requirement to compare the depth of parallelism of both sides wheel hub.

Referring to fig. 23, 24, 25 and 26, as a preferred technical solution of the present invention, the knuckle assembling station 60 and the hub assembling station 70 further include a manual turning device 100 for turning the axle body, the manual turning device includes a turning top plate 101 suspended from the gantry 10, two connecting rod assemblies 102 rotatably disposed at two ends of the turning top plate and rotatably connected to each other, and clamping sleeves 103 rotatably disposed at inner sides of bottom ends of the two connecting rod assemblies for clamping front and rear elliptical columns of the axle body, in an actual use process, the manual turning device is hoisted to the KBK crane, after an assembling pallet carries a workpiece to perform a station, the clamping sleeves at two sides are manually driven to clamp the front and rear elliptical columns of the axle body, after hoisting, the connecting rod assemblies automatically clamp the axle body, the turning top plate can achieve horizontal rotation of the device, the existence of the clamping sleeves can achieve vertical rotation of the device, thereby turning the axle body to a proper position, so as to assemble the steering knuckle and the wheel hub at two sides of the bridge body, thereby being beneficial to improving the working efficiency and reducing the labor intensity of workers.

Furthermore, the turnover top plate 101 is connected with the portal frame through a horizontal rotating joint 104 which is rotatably arranged at the top of the turnover top plate, so that the turnover top plate can rotate in the horizontal direction, the connecting rod assembly 102 comprises a first connecting rod 1021 which is rotatably connected with the turnover top plate and a second connecting rod 1022 which is rotatably connected with the first connecting rod at one end and is hinged with the middle of the first connecting rod, a driving handle is further arranged on the side wall of the other end of the second connecting rod, the clamping sleeve 103 is rotatably connected with the second connecting rod through a vertical rotating joint 105, and when the bridge body is hoisted through the clamping sleeve, the second connecting rods on the two sides are driven to be close under the action of self gravity, so that the automatic clamping of the bridge body is realized.

The working principle is as follows: when the device is used, the joint bearings are firstly press-fitted into two sides of the oil cylinders through the oil cylinder joint bearing press-fitting mechanism 80, the bridge body is on line and is conveyed to the oil cylinder assembly station 30 along with the speed-multiplying chain line body 220, the oil cylinders are manually installed on the bridge body through bolts, then the bridge body is conveyed to the needle bearing assembly station 40 along with the line body, the needle bearings are press-fitted on the bridge body by using the bearing press 50, then the bridge body is conveyed to the knuckle assembly station 60 along with the line body, the knuckle is manually installed on the bridge body, the main pin is installed between the bridge body and the knuckle, then the oil cylinder connecting rod is installed between the knuckle and the oil cylinders, then the bridge body is conveyed to the hub assembly station 70 along with the line body, the hubs are manually pressed on two sides of the bridge body, then the bridge body is moved to the hub parallelism online detection station 90, the hub parallelism at two sides of the bridge body is detected, finally the assembled bridge body is off line, and the assembly tray 240 for conveying the bridge body is driven by the lifting mechanism 270, and the chain body is conveyed from the upper layer speed-multiplying chain body to the lower layer speed-multiplying chain body, so that the assembly tray can be recycled.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. The utility model provides a fork truck steer axle assembly line, includes portal frame (10), its characterized in that still includes:

the conveying line body (20) is used for conveying the steering bridge to move in sequence along the assembling process;

the oil cylinder assembling station (30) is used for installing the oil cylinder on the bridge body;

the needle bearing assembling station (40) is used for pressing the needle bearing on the bridge body through a bearing press (50) hung on the portal frame;

the steering knuckle assembling station (60) is used for connecting the steering knuckle with the bridge body and the oil cylinder; and

a hub assembly station (70) for mounting the hub assembly on the knuckle.

2. The assembly line according to claim 1, characterized in that the gantry (10) comprises a frame (11), a KBK crane (12) arranged at the top of the frame for handling, the KBK crane comprising a KBK rail (13) arranged at the top of the frame, travelling wheels (14) movable along the KBK rail, electric hoists (15) arranged on the travelling wheels for transporting.

3. The assembly line according to claim 1, characterized in that said conveyor line body (20) comprises a machine frame (210), speed-multiplying chain bodies (220) arranged hierarchically on the machine frame (210), a line body motor (230) for driving the speed-multiplying chain bodies in operation, and an assembly tray (240) movable along the speed-multiplying chain bodies and for placing a bridge body.

4. The assembly line according to claim 3, characterized in that the speed-multiplying chain body (220) comprises two chain support rails (221) distributed along the length direction of the machine frame (210), a speed-multiplying chain (222) arranged on the chain support rails in a transmission manner, and a chain wheel arranged at the end of the chain support rails for chain transmission, and the output end of the line body motor (230) is connected with the chain wheel.

5. The assembly line according to claim 4, characterized in that said conveyor line body (20) is also provided, at the ends, with a lifting mechanism (270) for carrying out the transfer of the assembly trays between the layered double-speed chain bodies.

6. The assembly line of claim 4, further comprising a press-fitting mechanism (80) for mounting the knuckle bearing of the steering axle oil cylinder, wherein the press-fitting mechanism comprises a press-fitting table (81), a material rest (82) arranged at the top of the press-fitting table, a press (83) arranged on two sides of the material rest and in an L shape, a positioning tool (85) capable of moving along the horizontal part of the press through a slide rail (84), a second lower pressing head (86) arranged on two sides of the positioning tool, a pressurizing cylinder (87) arranged at the top end of the vertical part of the press, and a second upper pressing head (88) arranged at the output end of the pressurizing cylinder and used for press-fitting.

7. The assembly line according to claim 6, characterized in that the bearing press (50) comprises a base plate (51), a cylinder mounting plate (52) fixed above the base plate, a hoisting plate (53) fixed above the cylinder mounting plate, and press plates (54) fixed below the base plate and arranged in layers, the base plate is provided with an upper press head (55) capable of moving telescopically through a spring, the tops of the two press plates are respectively provided with a middle press head (56) and a lower press head (57), the top of the cylinder mounting plate is provided with a driving cylinder (58) for driving the upper press head to move telescopically, and the two sides of the base plate are provided with a second handle (59) for driving the needle bearing press to move.

8. Assembly line according to claim 7, characterized in that it further comprises a steering axle hub parallelism in-line detection station (90) at the blanking end, the on-line detection station comprises a frame base (91) arranged on two sides of a speed doubling chain body (220), a gantry frame (92) arranged on the top of the frame base, a pressing cylinder (93) arranged on the top of the gantry frame and used for pressing a workpiece, a righting tool (94) arranged on a hub of the bridge body, a righting pressure cylinder (95) arranged on the side wall of the gantry frame and the output end of the righting pressure cylinder extending into the gantry frame, a righting pressure head (951) arranged at the output end of the righting pressure cylinder, and two sensors (96) arranged on the end face of the righting pressure head and used for detecting the parallelism of the hub in a righting state, and a lifting cylinder for lifting the assembly tray (240) is also arranged at the top of the rack base (91).

9. The assembly line according to claim 4, characterized in that the knuckle assembly station (60) and the hub assembly station (70) further comprise a manual turnover device (100) for turning over the bridge, and the manual turnover device comprises a turnover top plate (101) suspended from the gantry (10), two connecting rod assemblies (102) rotatably arranged at two ends of the turnover top plate and rotatably connected with each other, and clamping sleeves (103) rotatably arranged at the inner sides of the bottom ends of the two connecting rod assemblies and used for clamping front and rear elliptic cylinders of the bridge.

10. The assembly line of claim 9, characterized in that the turnover top plate (101) is connected with the portal frame through a horizontal rotary joint (104) rotatably arranged at the top of the turnover top plate, the connecting rod assembly (102) comprises a first connecting rod (1021) rotatably connected with the turnover top plate and a second connecting rod (1022) rotatably connected with the first connecting rod at one end and hinged with each other at the middle part, a driving handle is further arranged on the side wall of the other end of the second connecting rod, and the clamping sleeve (103) is rotatably connected with the second connecting rod through a vertical rotary joint (105).