CN113478080B - Position-changing workbench - Google Patents

Abstract

The invention relates to the technical field of welding processing, and particularly discloses a deflection workbench which comprises a rack with double stations, a driving base station for driving the rack to rotate and two station positioning modules symmetrically arranged on the driving base station; each station of the rack is provided with a turnover swing frame, a swing frame driving mechanism for driving the swing frame to turn over and a disc brake structure for braking the swing frame; the station positioning module comprises a positioning block, a positioning support, a limiting piece arranged on the positioning support and a displacement sensor arranged beside the limiting piece, the positioning block is arranged at the bottom of the rack, and a displacement sensing piece is arranged on the positioning block; and the positioning support is provided with a locking mechanism and a buffer structure. The invention provides a position-changing workbench which can be used for carrying out rotary locking and turnover locking on a rack through a disc brake structure and a locking mechanism, so that the stability of the rack is improved, and the welding effect is ensured.

Description

Position-changing workbench

Technical Field

The invention relates to the technical field of welding processing, in particular to a deflection workbench.

Background

The workstation that shifts is the equipment that automatic laser welding was realized to cooperation welding machines hand, the workstation that shifts can make the work piece of treating processing get into the weld zone through predetermined gyration and realize welding process, and the work piece of accomplishing processing then turns back to supreme unloading district in step again and goes up the unloading operation on this station, the workstation that shifts now turns back in place, generally do not carry out the gyration locking to the workstation, can exert external force to the workstation at work piece course of working or the unloading process of going up, cause the workstation to rock or shift easily, thereby influence the welding effect of work piece. In addition, the workbench can turn over the workpiece to be matched with a welding manipulator for operation, so that the position of a welding seam on the workpiece is in the best welding position, and the welding speed and the welding effect are improved. Similarly, the workstation is not overturn the locking to the workstation to the welding upset back that targets in place, can cause upset driving motor's axle transmission moment of torsion load increase on the one hand, influences upset driving motor's life, and in the on the other hand course of working, the contact of work piece and bonding tool can exert external force to the workstation, causes the trip shaft to take place to rotate easily to change rotation angle, influence the welding effect of work piece.

It is seen that improvements and enhancements to the prior art are needed.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the present invention is directed to a shift table that is capable of performing swing locking and tilt locking of the table.

In order to achieve the purpose, the invention adopts the following technical scheme:

a displacement workbench comprises a rack with double stations, a driving base station and two station positioning modules, wherein the driving base station is arranged at the bottom of the rack and used for driving the rack to rotate, and the two station positioning modules are symmetrically arranged on the driving base station; each station of the rack is provided with a turnover swing frame, a swing frame driving mechanism for driving the swing frame to turn over and a disc brake structure for braking the swing frame; the station positioning module comprises a positioning block, a positioning support, a limiting piece arranged on the positioning support and a displacement sensor arranged beside the limiting piece, the positioning block is arranged at the bottom of the rack, a displacement sensing piece is arranged on the positioning block, and the displacement sensing piece is used for triggering the displacement sensor; the positioning support is provided with a locking mechanism used for pressing the positioning block on the limiting part and a buffer structure used for reducing the speed of the positioning block.

The driving base station comprises a substrate, an underframe used for supporting the substrate, a traction gear rotatably arranged on the substrate, a motor support plate horizontally arranged on the substrate and a deflection driving motor arranged on the motor support plate; a main shaft of the deflection driving motor is provided with a driving gear, the driving gear is in meshing transmission with a traction gear, and the traction gear is used for bearing a rack; the two groups of station positioning modules are arranged on the base plate and symmetrically arranged on two sides of the traction gear; the positioning support comprises a bottom plate arranged on the base plate and a vertical plate arranged on the bottom plate, and the locking mechanism and the limiting part are arranged on the vertical plate in parallel.

The locking mechanism comprises a corner pressing cylinder arranged on a vertical plate, and the corner pressing cylinder comprises a cylinder body, a rotary arm arranged at the end part of the piston rod and a compression screw arranged on the rotary arm.

The limiting part is a circular ring limiting block, the buffering structure comprises a hydraulic buffer coaxially arranged with the circular ring limiting block, an avoiding hole for a piston rod of the hydraulic buffer to penetrate through is formed in the vertical plate, and the piston rod of the hydraulic buffer and the collided head can move in an inner ring of the circular ring limiting block.

Be provided with two at least elongated holes that extend along the fore-and-aft direction on the bottom plate, every elongated hole corresponds a locking screw of installation, the rear of bottom plate is equipped with a support regulating block, two regulation screw holes and the through-hole of setting between two regulation screw holes are seted up on the side that the support regulating block deviates from the bottom plate, be equipped with on the rear end face of bottom plate with the coaxial positioning screw hole that sets up of through-hole, the through-hole department of support regulating block passes direction stop screw and packs into positioning screw hole, every bottom plate top tight screw is installed to the regulation screw hole department adaptation of support regulating block, and the free end of bottom plate top tight screw supports presses the rear end face at the bottom plate.

The lubricating assembly used for lubricating the traction gear is arranged on the base plate, the oil blocking surrounding edge is arranged on the upper surface of the base plate, the oil return hole is formed in the base plate, and the traction gear and the oil return hole are arranged inside the oil blocking surrounding edge under the projection on the horizontal plane.

The lubricating assembly comprises an oil supply assembly, a fulcrum shaft arranged on the base plate and a lubricating wheel rotatably arranged on the fulcrum shaft, and the lubricating wheel is abutted against the transmission teeth on the traction gear; the oil supply assembly is used for adding oil to the lubricating wheel; the motor support plate is characterized in that adjusting lugs are arranged on two sides of the motor support plate, gear adjusting blocks opposite to the adjusting lugs are arranged on the base plate, a gear jacking screw facing the adjusting lugs is in threaded connection with each gear adjusting block, and the free end of each gear jacking screw is abutted against the corresponding adjusting lug.

The rack comprises two symmetrically arranged branch pipes, a beam pipe for connecting the two branch pipes and a support plate horizontally and fixedly arranged on the bottom surface of the beam pipe, the support plate is connected with the top of the traction gear through a backing plate, one side of each swing frame is rotatably connected with one branch pipe through a driving shaft, and the other side of each swing frame is rotatably connected with the other branch pipe through a driven shaft.

The disc brake structure is including setting up stopper, zero-bit sensor, the cover in one of them branch pipe inner chamber tightly on the driven shaft the axle sleeve and the dish of cover on the driven shaft tip, axle sleeve and dish fixed connection, be equipped with the zero-bit response piece on the axle sleeve, the zero-bit response piece is used for triggering zero-bit sensor, the stopper is used for holding tightly the locking to the dish.

The swing frame driving mechanism comprises a turnover driving motor and a coupler, the turnover driving motor is rotatably connected with the driving shaft through the coupler, and the turnover driving motor and the deflection driving motor are band-type brake motors.

Has the advantages that:

compared with the prior art, the displacement station platform provided by the invention is arranged between the welding area and the feeding and discharging area, the positioning block is additionally arranged at the bottom of the platform frame, the displacement sensing piece on the positioning block triggers the displacement sensor to send a braking signal, the response is sensitive, a specific controller is not needed, the manufacturing cost is low, then the positioning block is matched with the limiting piece for positioning after being buffered by the buffer structure, the positioning block is locked by the locking mechanism, on one hand, the limiting piece is attached to the positioning block, the positioning is accurately finished, the positioning error is greatly reduced, on the other hand, the position of the positioning block is locked, and the platform frame is ensured not to move automatically during the processing. In addition, the swing frame driving mechanism drives the swing frame to overturn to a specified angle, then the disc brake structure brakes the driven shaft, the shaft force transmission is effectively braked, the shaft transmission torque is effectively reduced, the service life of the swing frame driving mechanism is prolonged, the working position is kept stable, the table frame is ensured not to shake during welding and machining, and the machining precision is high.

Drawings

Fig. 1 is a perspective view of a shift station provided by the present invention.

FIG. 2 is a top view of the indexing station in cooperation with a welding robot.

FIG. 3 is a top view of the indexing station table at a change station.

Fig. 4 is a front view of the indexing station.

Fig. 5 is a perspective view of the driving base.

Fig. 6 is a partially enlarged view of the region L in fig. 5.

Fig. 7 is a top view of the drive base and station positioning module.

Fig. 8 is a bottom view of the drive base and station positioning module.

Fig. 9 is a first perspective view of the station positioning module in an unset state.

Fig. 10 is a perspective view of the second workstation positioning module in an unset state.

Fig. 11 is a perspective view of the station positioning module in a positioned state.

Fig. 12 is a perspective view of the swing frame in a horizontal state.

Fig. 13 is a perspective view of the swing frame in a flipped state.

Fig. 14 is a structural schematic diagram of a disc brake structure.

Detailed Description

The present invention provides a shift table, which will be described in further detail below with reference to the accompanying drawings and examples, in order to make the objects, technical solutions and effects of the present invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.

Herein, the directions of the feeding and discharging regions toward the welding region are "front", "front" and "rear" directions.

Referring to fig. 1-4, the present invention provides a position changing table, which includes a rack 3 having two stations, a driving base 1 disposed at the bottom of the rack 3 and used for driving the rack 3 to rotate, and two station positioning modules 2 symmetrically disposed on the driving base 1; each station of the rack 3 is provided with a turnover swing frame 5, a swing frame driving mechanism for driving the swing frame 5 to turn over and a disc brake structure 4 for braking the swing frame 5; the station positioning module 2 comprises a positioning block 21, a positioning support 22, a limiting piece 27 arranged on the positioning support 22 and a displacement sensor 23 arranged beside the limiting piece 27, the positioning block 21 is installed at the bottom of the rack 3, a displacement sensing piece 25 is arranged on the positioning block 21, and the displacement sensing piece 25 is used for triggering the displacement sensor 23; the positioning support 22 is provided with a locking mechanism for pressing the positioning block 21 against the limiting member 27 and a buffering structure for decelerating the positioning block 21. As mentioned, it should be understood that the welding fixture 76 is fixed on the swing frame 5, and the workpiece is clamped and positioned by the welding fixture 76. The driving base station 1, the station positioning module 2, the swing frame driving mechanism and the disc brake structure 4 are all electrically connected with the control system.

In practical application, as shown in fig. 2 and 3, a welding zone 71 and a loading and unloading zone 72 are arranged in parallel, a welding manipulator 73 is arranged in the welding zone 71, and the welding manipulator is enclosed by a fence to ensure the processing safety; the position changing station platform is arranged between a welding area 71 and a loading and unloading area 72, under the condition of non-position changing, one station 74 on the rack 3 is positioned in the welding area 71, the other station 75 is positioned in the loading and unloading area 72, and welding processing equipment does not exist in the loading and unloading area 72, so that personnel safety is protected when workers mount or dismount the stations in the loading and unloading area 72.

Under the condition of no displacement, the positioning block 21 is positioned in front of the two station positioning modules 2, the positioning block 21 is matched with one station positioning module 2 to realize positioning, when the rack 3 needs to exchange two stations to transfer a workpiece on the rack 3, the driving base station 1 drives the rack 3 to rotate, the positioning block 21 approaches to the other station positioning module 2 along a circular arc-shaped advancing track, the displacement sensing piece 25 on the positioning block 21 also approaches to the displacement sensor 23, when the displacement sensing piece 25 on the positioning block 21 triggers the displacement sensor 23, the displacement sensor 23 feeds back a signal to the control system, the control system controls the driving base station 1 to stop driving the rack 3 instantly, at the moment, the rack 3 also has a certain amount of inertial motion, the buffer structure slowly decelerates the positioning block 21 to guide the positioning block 21 to be contacted with the front end face of the limiting piece 27, prevent that locating piece 21 from taking place the rigidity collision to locating piece 27, then locking mechanical system compresses tightly locating piece 21 on locating piece 27, make locating piece 27 and locating piece 21 laminate mutually on the one hand, accomplish the location accurately, the greatly reduced positioning error, on the other hand has locked the position of locating piece 21, ensure that rack 3 can not take place the self-movement man-hour, positioning accuracy is high, repeated positioning accuracy 0.02mm, need not specific controller, the cost of manufacture is low, excellent in use effect.

After the station on the rack 3 is changed, the swing frame 5 on the rack 3 is in a horizontal state (namely, the swing frame 5 is in a zero position or an initial position), a control system controls the swing frame driving mechanism to drive the swing frame 5 to overturn to a specified angle according to a set control program, the position of the swing frame 5 can be understood as a working position at the moment, then the disc brake structure 4 brakes the driven shaft 42, the shaft force transmission is effectively braked, the shaft transmission torque is effectively reduced, the service life of the swing frame driving mechanism is prolonged, the working position is kept stable, the rack 3 is ensured not to shake during welding and machining, and the machining precision is high. It will be appreciated that when the swing frame 5 is returned to the zero position, the disc brake structure 4 also brakes the driven shaft 42, thereby keeping the swing frame 5 stable.

Specifically, referring to fig. 5 to 11, the driving base 1 includes a substrate 11, a chassis for supporting the substrate 11, a traction gear 131 rotatably disposed on the substrate 11, a motor support plate 132 horizontally disposed on the substrate 11, and a displacement driving motor 133 disposed on the motor support plate 132; a main shaft of the deflection driving motor 133 is provided with a driving gear 134, the driving gear 134 is in meshing transmission with a traction gear 131, and the traction gear 131 is used for bearing the rack 3; two sets of station orientation modules 2 set up on base plate 11 and the symmetry sets up in traction gear 131 both sides. The traction gear is horizontally arranged and is in rotary connection with the base plate 11 through a crossed roller bearing, due to the independent design of driving and positioning of the rack 3, the transmission structure is simplified, the manufacturing cost is reduced, the traction gear 131 has a power transmission effect and a supporting and bearing effect on the rack 3, and the rack 3 can be stably installed on the traction gear 131 through a base plate. The positioning support 22 comprises a bottom plate 221 arranged on the base plate 11 and a vertical plate 222 arranged on the bottom plate 221, and the locking mechanism and the limiting member 27 are arranged on the vertical plate 222 in parallel, so that the positioning module is compact in structure, the required assembly space is reduced, and the positions of the locking mechanism and the limiting member 27 can be finely adjusted synchronously by adjusting the position of the positioning support 22.

Specifically, the locking mechanism comprises a corner pressing cylinder 29 arranged on the vertical plate 222, and the corner pressing cylinder 29 comprises a cylinder 291, a rotary arm 292 arranged at the end of the piston rod, and a compression screw 293 arranged on the rotary arm 292. As shown in fig. 9 and 10, in the initial state, the piston rod of the corner depressing cylinder 29 is extended, the rotating arm 292 thereof is vertically disposed downward, and the pressing screw 293 is disposed toward the vertical plate 222, so that the corner depressing cylinder 29 does not interfere with the traveling path of the positioning block 21. As shown in fig. 11, when the sensor is triggered by the sensing piece on the positioning block 21, after the control system obtains a feedback signal of the sensor, the control system controls the corner pressing cylinder 29 to act, the piston rod of the corner pressing cylinder 29 drives the rotary arm 292 to swing 90 ° in the direction of the positioning block 21, so that the pressing screw 293 faces the positioning block 21, and then the piston rod retracts into the cylinder 291, thereby driving the pressing screw 293 to press the positioning block 21 on the limiting member 27, accurately completing the positioning, and ensuring that the gantry 3 does not move during processing.

In order to further improve the positioning reliability, the deflection driving motor 133 is a contracting brake motor, and after the corner pressing cylinder 29 is fastened in place, the control system controls the deflection driving motor 133 to brake and tightly hold, so that the double-acting-force positioning is realized.

It should be understood that, because the corner hold-down cylinder 29 is an existing product, compared with other locking mechanisms, the corner hold-down cylinder 29 has high functional integration, and can be directly assembled by selecting a suitable model on the market, so that the manufacturing cost is low. In order to prevent the rotary arm 292 from interfering with the substrate 11, an avoiding opening 110 is formed on the substrate 11, and in an initial state, the rotary arm 292 vertically passes through the avoiding opening downward.

As shown in fig. 5, in this embodiment, in order to further improve the structural compactness, the limiting member 27 is a circular limiting member, one end surface of the circular limiting member is fixedly connected to the vertical plate 222, and the other end surface is a limiting surface. The buffer structure comprises a hydraulic buffer 28 coaxially arranged with the circular ring limiting block, namely the hydraulic buffer 28 is arranged on the end surface of the vertical plate 222 departing from the limiting block 27, the vertical plate 222 is provided with an avoidance hole for a piston rod of the hydraulic buffer 28 to pass through, the piston rod of the hydraulic buffer 28 and the collision head 281 can move in an inner ring of the circular limiting block, the middle shaft space of the limiting block 27 is reasonably utilized, the limiting block 27 and the hydraulic buffer 28 can conveniently limit the positioning block 21, the positioning block 21 can be conveniently machined, the positioning module is in a non-positioning state, the head 281 of the hydraulic buffer 28 protrudes from the limiting surface of the ring limiting block, when the positioning block 21 contacts with the collided head 281, the hydraulic buffer 28 buffers and decelerates the positioning block 21 by means of hydraulic damping, so that the impact force caused by the motion inertia of the positioning block 21 is solved, and the positioning block 21 can be attached to the circular ring limiting block accurately and without damage.

Referring to fig. 10, the positioning support 22 is adjustable back and forth, and the bottom plate 221 is provided with at least two elongated holes 223 extending in the back and forth direction, and each elongated hole 223 is correspondingly provided with a locking screw (not shown). The elongated hole 223 refers to a non-circular hole, and may be a rectangular hole, a waist-shaped hole, a rounded rectangular hole, or the like. By arranging the long hole 223 and the locking screw, when the horizontal position of the positioning support 22 needs to be changed, the locking screw is loosened to adjust the positioning position and then locked again, and the adjustment is convenient.

In order to facilitate fine adjustment, a support adjusting block 261 is arranged behind the bottom plate 221, two adjusting threaded holes 262 and a through hole arranged between the two adjusting threaded holes 262 are formed in the side face, away from the bottom plate 221, of the support adjusting block 261, a positioning threaded hole coaxially arranged with the through hole is formed in the rear end face of the bottom plate 221, the through hole of the support adjusting block 261 penetrates through a guide limiting screw 263 and is installed in the positioning threaded hole, the guide limiting screw 263 is in clearance fit with the through hole of the support adjusting block 261, due to the limitation of the head and the threaded section of the guide limiting screw 263, the positioning support 22 can only linearly move along the axial direction of the guide limiting screw 263 relative to the support adjusting block 261, and the distance between the bottom plate 221 and the support adjusting block 261 is determined by adjusting the depth of the guide limiting screw 263 screwed into the positioning threaded hole. A bottom plate jacking screw 264 is fittingly installed at the adjusting threaded hole 262 of each support adjusting block 261, the free end of the bottom plate jacking screw 264 is pressed against the rear end face of the bottom plate 221 by screwing the bottom plate jacking screw 264, so that the head of the guide limit screw 263 is tightly attached to the support adjusting block 261, the horizontal position of the support is locked, and finally the locking screw is screwed down, so that the support 22 can be completely fixed and positioned.

Specifically, the positioning block 21 includes an upper connecting plate 211 and a lower connecting plate 212 disposed at the bottom of the upper connecting plate 211, that is, the positioning block 21 is shaped as a T-shaped block, the upper connecting plate 211 is provided with a plurality of mounting holes 213, and each mounting hole 213 is provided with a screw, so that the screw is fixedly connected to the rack 3.

The sensor is preferably a slot-type correlation photoelectric sensor which is small and precise and can be directly installed on the substrate 11 without being installed by means of a sensor bracket 47, and when the sensing piece passes through between a light emitter and a receiver on the slot-type correlation photoelectric sensor, the sensing piece blocks light transmitted by the light emitter, so that the slot-type correlation photoelectric sensor is triggered to respond and a signal is fed back to a control system, and the positioning block 21 reaches a preset position.

Preferably, referring to fig. 5 and 6, a lubrication assembly for lubricating the traction gear 131 is disposed on the base plate 11, an oil blocking peripheral edge 141 is disposed on the upper surface of the base plate 11, an oil return hole 142 is disposed on the base plate 11, and the traction gear 131 and the oil return hole 142 are disposed inside the oil blocking peripheral edge 141 in a projection on a horizontal plane. Lubricating oil behind the lubricated traction gear 131 can be directly on dropping the base plate 11 under the action of gravity, and the oil baffle surrounding edge 141 restricts the flow direction of lubricating oil, prevents that lubricating oil from spilling over base plate 11 and polluting workshop ground, and the lubricating oil in the oil baffle surrounding edge 141 can flow into oil return hole 142, and oil return hole 142 department connects an oil return pipe, and oil return pipe is with lubricating oil drainage to oil collecting container realization collection, is favorable to follow-up reuse lubricating oil.

Specifically, the lubricating unit includes an oil supply unit, a support shaft 143 provided on the base plate 11, and a lubricating member 144 rotatably provided on the support shaft 143, and the lubricating member 144 abuts against the transmission gear of the traction gear 131. The oil supply assembly comprises an oil supply pump, an oil delivery pipe and an oil adding channel 145 arranged on the fulcrum 143, wherein one end of the oil adding channel 145 is arranged on the outer surface of the fulcrum 143, and the other end of the oil adding channel 145 is arranged at the top end of the fulcrum 143; the inlet pipe of the oil supply pump is connected with the oil tank, and the oil supply channel 145 is connected with the oil outlet pipe of the oil supply pump through a connecting pipe. When the worker turns on the oil supply pump, the lubricant oil flows out from the top end of the support shaft 143 through the oil supply passage 145 to wet the lubricant wheel 144, and the lubricant oil is uniformly transferred to the transmission teeth of the traction gear 131 by the rotation of the traction gear 131 by the lubricant wheel 144, so that the drive gear 134 is also lubricated well, the transmission resistance between the traction gear 131 and the drive gear 134 is reduced, and the smoothness of the movement of the traction gear 131 and the drive gear 134 is maintained.

Preferably, referring to fig. 6, the two sides of the motor support plate 132 are both provided with an adjusting lug 151, the base plate 11 is provided with a gear adjusting block 152 opposite to the adjusting lug 151, the gear adjusting block 152 is L-shaped, the inner side surface of the gear adjusting block 152 is attached to the side surface of the motor support plate 132 to limit the position of the motor support plate 132 to be adjusted only in the front-back direction, each gear adjusting block 152 is in threaded connection with a gear tightening screw 153 facing the adjusting lug 151, and the free end of the gear tightening screw 153 is pressed against the adjusting lug 151. During assembly, the gear jacking screw 153 is screwed, and the gear jacking screw 153 pushes the adjusting lug 151 to move towards the direction of the traction gear 131, so that the traction gear 131 and the driving gear 134 are close to each other, the effect of adjusting the installation clearance between the traction gear 131 and the driving gear 134 is achieved, and the movement smoothness and reliability of the traction gear 131 and the driving gear 134 are further ensured.

The rack 3 comprises two symmetrically arranged branch pipes 31, a beam pipe 32 for connecting the two branch pipes 31 and a support plate 33 horizontally and fixedly arranged on the bottom surface of the beam pipe 32, the support plate 33 is connected with the top of a traction gear 131 through a backing plate, one side of each swing frame 5 is rotatably connected with one branch pipe 31 through a driving shaft 63, and the other side of each swing frame is rotatably connected with the other branch pipe 31 through a driven shaft 42. The two branch pipes 31 and the beam pipe 32 form an H shape, and the connecting wires are laid in the inner cavities of the branch pipes 31 and the beam pipe 32, so that the wiring is neat, and the device is attractive and practical.

Referring to fig. 12 to 14, the disc brake structure 4 includes a brake 41 disposed in an inner cavity of one of the branch pipes 31, a zero position sensor 441, a sleeve 43 tightly sleeved on the driven shaft 42, and a disc 45 sleeved on an end of the driven shaft 42, the sleeve 43 is fixedly connected with the disc 45, a zero position sensing piece 442 is disposed on the sleeve 43, the zero position sensing piece 442 is used for triggering the zero position sensor 441, and the brake 41 is used for tightly locking the disc 45. The zero sensor 441 and the brake 41 are both electrically connected with the control system.

It can be understood that, when the zero position sensing piece 442 triggers the zero position sensor 441, the zero position sensor 441 feeds back a signal to the control system, and the control system then controls the brake 41 to hold the disk 45 tightly, so as to lock the driven shaft 42, so that the rack 3 cannot be turned over, at this time, the position of the rack 3 can be understood as a zero position or an initial position, and the brake 41 and the disk 45 form a braking state, so as to keep the zero position stable.

When the rack 3 needs to be turned, the control system controls the brake 41 to loosen the disc 45, the swing frame driving mechanism drives the rack 3 to turn, the driven shaft 42 and the disc 45 rotate to a specified angle, then the control system controls the brake 41 to tightly hold the disc 45, and further the driven shaft 42 is locked, so that the rack 3 cannot be turned and moved, the position of the rack 3 can be understood as a working position at the moment, the brake 41 and the disc 45 form a braking state, the shaft transmission is effectively braked, the shaft transmission torque is effectively reduced, the service life of the driving mechanism is prolonged, the working position is kept stable, the rack 3 is ensured not to shake during welding and machining, and the machining precision is high.

When the zero-position sensing piece 442 triggers the sensor, the rack 3 accurately reaches the zero position and is then turned to the next working position, so that the position accuracy of the working position is ensured.

Specifically, referring to fig. 14, the shaft sleeve 43 is composed of a sleeve head 431 and a locking arc block 432, a shaft hole coaxially arranged with the driven shaft 42 is formed in the sleeve head 431, the driven shaft 42 is inserted into the shaft hole, and the locking arc block 432 and the sleeve head 431 clamp the driven shaft 42 together and are tightened by tightening a screw. By such arrangement, the sleeve head 431 and the locking arc 432 are detachably connected, so that the position of the shaft sleeve 43 on the driven shaft 42 can be adjusted, and the zero position sensing piece 442 and the disk 45 can be adjusted to be in proper positions more conveniently.

Further, the zero sensor 441 is supported by the bracket 47, the zero sensor 441 is preferably a slot-type correlation photoelectric sensor, and the zero sensing piece 442 can block light transmitted between a light emitter and a light receiver on the slot-type correlation photoelectric sensor, so as to feed back the in-place situation of the pendulum to the control system.

The brake 41 is preferably a pneumatic brake 41, and the pneumatic brake 41 has the advantages of simple structure, rapid and stable action, no oil stain, direct purchase and installation from the market, and low manufacturing cost.

Further, referring to fig. 12 and 13, the swing frame 5 includes a rectangular frame 51, and two brackets 52 symmetrically disposed at two sides of the rectangular frame 51, wherein one bracket 52 is fixedly connected to the driving shaft 63, the other bracket 52 is fixedly connected to the driven shaft 42, and the two brackets 52 jointly support the rectangular frame 51. The upper surface of rectangular frame 51 forms a table surface substantially, rectangular frame 51's upper surface has arranged anchor clamps mounting hole 53, and anchor clamps pass through bolt and anchor clamps mounting hole 213 to be fixed on rectangular frame 51, and when upset driving motor 61 drive main shaft rotated, anchor clamps on pendulum frame 5 and the pendulum frame 5 followed the main shaft and overturn to the angle of setting for, and dish structure 4 of stopping locks driven shaft 42 to guarantee the stability of rack 3 at zero-bit and work position.

Further, the swing frame driving mechanism comprises a turnover driving motor 61 and a coupler 62, the turnover driving motor 61 is rotatably connected with the driving shaft 63 through the coupler 62, the turnover driving motor 61 is a band-type brake motor, and when the brake 41 tightly holds the disc 45, the displacement driving motor 133 is braked tightly to realize double-acting-force positioning.

Specifically, referring to fig. 7 and 8, the base frame includes a cylinder 16 and a plurality of sets of leg assemblies 17 for supporting the cylinder 16; the upper edge of the cylinder 16 is welded and fixed with the base plate 11, and the inner wall of the cylinder 16 and the bottom surface of the base plate 11 are provided with reinforcing ribs 18, so that the base plate 11 is better supported. Each group of the leg assemblies 17 comprises a connecting leg plate 171 and a ground leg plate 172 arranged on the bottom surface of the connecting leg plate 171, the connecting leg plate 171 is in screw connection with the ground leg plate 172, and two ground pile holes 173 located on two sides of the connecting leg plate 171 are formed in the ground leg plate 172. In practical applications, the pile hole 173 is used for inserting a pile to fix the driving base to the ground, thereby ensuring the working stability of the platform 3. In addition, the lateral wall of drum 16 is provided with the side seal board, dismantles the side seal board and can maintain the structure of drum 16 inside, convenient to use.

Preferably, the branch pipe 31 is provided with a baffle 8 perpendicular to the branch pipe, the baffle separates two stations, the baffle prevents sparks generated by welding from splashing to the upper blanking area 72, the safety of personnel is protected, and the middle position of the baffle is preferably set to be a transparent panel, so that the personnel can observe the welding condition of the welding area through the transparent panel 81.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other suitable relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the protective scope of the present invention.

Claims (8)

1. A displacement workbench is characterized by comprising a rack with double stations, a driving base station arranged at the bottom of the rack and used for driving the rack to rotate, and two station positioning modules symmetrically arranged on the driving base station; each station of the rack is provided with a turnover swing frame, a swing frame driving mechanism for driving the swing frame to turn over and a disc brake structure for braking the swing frame; the station positioning module comprises a positioning block, a positioning support, a limiting piece arranged on the positioning support and a displacement sensor arranged beside the limiting piece, the positioning block is arranged at the bottom of the rack, a displacement sensing piece is arranged on the positioning block, and the displacement sensing piece is used for triggering the displacement sensor; the positioning support is provided with a locking mechanism for pressing the positioning block on the limiting piece and a buffer structure for decelerating the positioning block; the driving base station comprises a substrate, an underframe used for supporting the substrate, a traction gear rotatably arranged on the substrate, a motor support plate horizontally arranged on the substrate and a deflection driving motor arranged on the motor support plate; a main shaft of the deflection driving motor is provided with a driving gear, the driving gear is in meshing transmission with a traction gear, and the traction gear is used for bearing a rack; the two groups of station positioning modules are arranged on the base plate and symmetrically arranged on two sides of the traction gear; the positioning support comprises a bottom plate arranged on the base plate and a vertical plate arranged on the bottom plate, and the locking mechanism and the limiting piece are arranged on the vertical plate in parallel; be provided with two at least elongated holes that extend along the fore-and-aft direction on the bottom plate, every elongated hole corresponds a locking screw of installation, the rear of bottom plate is equipped with a support regulating block, two regulation screw holes and the through-hole of setting between two regulation screw holes are seted up on the side that the support regulating block deviates from the bottom plate, be equipped with on the rear end face of bottom plate with the coaxial positioning screw hole that sets up of through-hole, the through-hole department of support regulating block passes direction stop screw and packs into positioning screw hole, every bottom plate top tight screw is installed to the regulation screw hole department adaptation of support regulating block, and the free end of bottom plate top tight screw supports presses the rear end face at the bottom plate.

2. The indexing table according to claim 1, wherein the locking mechanism comprises a corner hold-down cylinder disposed on a riser, the corner hold-down cylinder comprising a cylinder body, a swivel arm disposed at an end of the piston rod, and a hold-down screw disposed on the swivel arm.

3. The shift workbench according to claim 1, wherein the position limiting member is a circular ring position limiting member, the buffer structure comprises a hydraulic buffer coaxially arranged with the circular ring position limiting member, the vertical plate is provided with an avoiding hole for a piston rod of the hydraulic buffer to pass through, and the piston rod and the collided head of the hydraulic buffer can move in the inner ring of the circular ring position limiting member.

4. The indexing table according to claim 1, wherein a lubrication assembly is provided on the base plate for lubricating the traction gear, an oil retaining rim is provided on the upper surface of the base plate, an oil return hole is provided on the base plate, and the traction gear and the oil return hole are provided inside the oil retaining rim in a projection on a horizontal plane.

5. The indexing table according to claim 4 wherein the lubricating assembly comprises an oil supply assembly, a fulcrum shaft provided on the base plate, and a lubricating wheel rotatably provided on the fulcrum shaft, the lubricating wheel abutting against the driving teeth on the traction gear; the oil supply assembly is used for adding oil to the lubricating wheel; the motor support plate is characterized in that adjusting lugs are arranged on two sides of the motor support plate, gear adjusting blocks opposite to the adjusting lugs are arranged on the base plate, a gear jacking screw facing the adjusting lugs is in threaded connection with each gear adjusting block, and the free end of each gear jacking screw is abutted against the corresponding adjusting lug.

6. The shifting workbench according to claim 4, wherein the rack comprises two symmetrically arranged branch pipes, a beam pipe for connecting the two branch pipes and a support plate horizontally fixed on the bottom surface of the beam pipe, the support plate is connected with the top of the traction gear through a backing plate, one side of each swing frame is rotatably connected with one branch pipe through a driving shaft, and the other side of each swing frame is rotatably connected with the other branch pipe through a driven shaft.

7. The deflection workbench according to claim 6, wherein the disc brake structure comprises a brake arranged in the inner cavity of one of the branch pipes, a zero sensor, a shaft sleeve tightly sleeved on the driven shaft, and a disc sleeved on the end of the driven shaft, wherein the shaft sleeve is fixedly connected with the disc, the shaft sleeve is provided with a zero sensing piece, the zero sensing piece is used for triggering the zero sensor, and the brake is used for tightly holding and locking the disc.

8. The shifting workbench according to claim 6, wherein the swing frame driving mechanism comprises a turning driving motor and a coupling, the turning driving motor is rotatably connected with the driving shaft through the coupling, and the turning driving motor and the shifting driving motor are both band-type brake motors.

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