Annular workpiece transfer system

Abstract

The utility model discloses an annular workpiece transfer system which comprises a transfer trolley, a universal ball conveying platform, a lifting machine and a crane, the universal ball conveying platform, the lifting machine and the crane are connected in sequence, and the transfer trolley can move to make contact with the universal ball conveying platform and is automatically locked with the universal ball conveying platform through elastic force of an elastic piece. The annular workpieces loaded on the transfer trolley can be driven by manpower or equipment to pass through the universal ball conveying platform and then transferred to the hoister, the hoister hoists the workpieces to a set position, the hoister comprises a hoisting claw, and the hoisting claw penetrates through a central through hole of the workpieces at the set position through horizontal movement and lifting movement and then hooks the workpieces. And then the workpiece is transferred to a target station. According to the utility model, automatic or semi-automatic operation of batch transfer of annular workpieces among different stations can be realized, so that the working efficiency is greatly improved, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of workpiece transfer, in particular to a ring-shaped workpiece transfer system. Background Art

[0002] At present, when the clutch assembly is riveted, workers need to manually lift the clutch assembly parts from the carrier such as the tray and place them on the processing equipment, which is inefficient and labor-intensive, and is not conducive to production automation. Most of the clutch cover assembly parts are annular workpieces with large volume and weight, which further makes it difficult to transport them between different workstations. Utility Model Content

[0003] In view of the above-mentioned problems existing in the prior art, the purpose of the utility model is to provide an annular workpiece transfer system, which can realize automatic or semi-automatic operation for batch transfer of annular workpieces between different workstations, greatly improving work efficiency and reducing manual labor intensity.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A ring-shaped workpiece transfer system comprises a transfer trolley, a universal ball conveying platform, an elevator and a crane. The universal ball conveying platform, the elevator and the crane are connected in sequence. The transfer trolley can be moved to contact the universal ball conveying platform and automatically locked with the universal ball conveying platform through the elastic force of an elastic member. The ring-shaped workpiece loaded on the transfer trolley can be driven by humans or equipment through the universal ball conveying platform and then transferred to the elevator. The elevator lifts the workpiece to a set position. The crane comprises a lifting claw. The lifting claw passes through the central through hole of the workpiece at the set position through horizontal movement and lifting movement, then hooks the workpiece and transfers the workpiece to a target workstation.

[0006] As a further improvement of the above technical solution:

[0007] The transfer trolley includes a first bearing part for carrying the workpiece to be transferred, and at least one row of rotatable rollers is arranged on the first bearing part. The universal ball conveying platform includes a second bearing part for supporting and carrying the workpiece, and a universal ball is arranged on the top surface of the second bearing part. When the transfer trolley and the universal ball conveying platform are both supported on the ground, the top surface of the first bearing part and the top surface of the second bearing part are flush and parallel to the horizontal plane.

[0008] A lock is provided on the transfer trolley, and a limit device is provided on the universal ball conveying platform. The limit device is rotatable and has a connecting groove. The limit device is also connected to an elastic member and a driving member. One end of the driving member is connected to the limit device and the other end is connected to an external pedal. When the pedal is stepped on, the drive is transmitted to the driving member, and the driving member drives the limit device to rotate. When the transfer trolley moves toward the universal ball conveying platform, the lock can contact and push the limit device, so that the elastic member is squeezed or stretched and the limit device rotates, until the lock moves along the limit device and is stuck in the connecting groove.

[0009] The lifting machine includes a lifting seat, a lifting mechanism and a support seat for supporting the workpiece. The lifting mechanism is installed on the lifting seat. The lifting mechanism is connected to and drives the support seat to rise or fall. The lifting seat also has a sensor for detecting the workpiece.

[0010] The crane includes a crane body and an electric cylinder, a cantilever and a lifting claw installed on the crane body. The crane body is provided with a first slide rail perpendicular to the horizontal plane, and a first slider is slidably provided on the first slide rail. The electric cylinder is connected to and drives the first slider to move back and forth in a straight line along the first slide rail. At least one second slider is fixed on the first slider. A second slide rail parallel to the horizontal plane is provided on the back of the cantilever. The second slider and the second slide rail are slidably matched, and the lifting claw is connected to one end of the cantilever.

[0011] The back of the cantilever is also provided with a synchronous belt, a synchronous wheel, and an electromagnetic damper. There are two synchronous wheels, which are rotatably mounted on the back of the cantilever. The synchronous belt is tensioned on the two synchronous wheels. The synchronous belt and the synchronous wheel can transmit drive. The electromagnetic damper is coaxially connected to one of the synchronous wheels. A synchronous belt clamp is fixedly mounted on the first slider, which clamps the synchronous belt but does not hinder the relative transmission of the synchronous belt and the synchronous wheel.

[0012] The electromagnetic damper is replaced by a motor, which can drive a synchronous wheel connected to it to rotate.

[0013] The lifting claw includes a main rod, a first lifting seat, a second lifting seat, a first connecting rod, a second connecting rod and a spring. The first lifting seat and the second lifting seat can be lifted and lowered on the main rod. The spring is sleeved on the main rod and is located between the second lifting seat and the first lifting seat. The first connecting rod and the second connecting rod are hinged to form a connecting rod group. One end of the connecting rod group is hinged to the second lifting seat, the middle part is hinged to the first lifting seat, and the other end is used to hook the workpiece. A limiting member for limiting the first lifting seat is provided on the main rod, and the first lifting seat is located between the second lifting seat and the limiting member.

[0014] The connecting rod group is provided with at least two groups, one end of the first connecting rod is hinged to the second lifting seat, and the other end is hinged to one end of the second connecting rod, the middle part of the second connecting rod is hinged to the first lifting seat, and the other end of the second connecting rod is provided with an outward hook. When the lifting claw is not subjected to external force, the hooks of all the connecting rod groups are located on the circumference of the same circle, and the diameter of the circle is larger than the inner diameter of the annular workpiece.

[0015] The lifting claw also includes a recovery handle, which is fixedly connected to the first lifting seat.

[0016] The beneficial effects of the utility model are:

[0017] (1) The batch transfer of annular workpieces between different workstations can be realized automatically or semi-automatically, which greatly improves work efficiency and reduces manual labor intensity.

[0018] (2) The lifting claw can transfer the workpieces one by one to the target operating station, and the timing of the lifting claw grabbing the workpiece can be controlled by automatically or manually pushing the cantilever, which improves the flexibility of operation.

[0019] (3) The transfer trolley and the universal ball conveying platform can be automatically connected to make the workpiece transfer process safe and stable. The stick on the transfer trolley and the universal ball on the universal ball conveying platform make the movement of the workpiece more labor-saving and smooth.

[0020] (4) The electromagnetic damper cooperates with the synchronous belt and synchronous wheel to produce a damping effect on the horizontal movement of the cantilever, making the movement smoother and more stable. At the same time, replacing the electromagnetic damper with a motor can realize the automatic control setting of the horizontal movement of the cantilever, which is flexible to use.

[0021] (5) The lifting claw can automatically hook the annular workpiece, and the lifting claw can achieve self-locking under the gravity of the annular workpiece to prevent the workpiece from falling from the lifting claw, making the transfer stable and safe.

[0022] (6) The control method is simple, and the automatic or manual operation of the components can be set according to specific needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an installation of an embodiment of the utility model.

[0024] Figure 2 It is a schematic structural diagram of a transfer vehicle according to an embodiment of the utility model.

[0025] Figure 3 yes Figure 2 An enlarged schematic diagram of point A.

[0026] Figure 4 The utility model is a schematic diagram of the structure of a universal ball conveying platform according to an embodiment of the utility model.

[0027] Figure 5 It is a schematic diagram of the structure of a hoist and a crane according to an embodiment of the utility model.

[0028] Figure 6 It is a schematic diagram of the back structure of the cantilever of an embodiment of the utility model.

[0029] Figure 7 yes Figure 5 An enlarged schematic diagram of point B.

[0030] Figure 8 It is a schematic diagram of the lifting claw structure of an embodiment of the utility model. DETAILED DESCRIPTION

[0031] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0032] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0033] A ring-shaped workpiece transfer system, such as Figure 1 As shown, it includes a transfer trolley 100, a universal ball conveying platform 200, a hoist 300, and a crane 400.

[0034] The transfer vehicle 100 is used to transfer the workpiece 500. Figure 2 As shown, the transfer vehicle 100 includes a first bearing portion 110, which is used to carry the transferred workpiece 500. The first bearing portion 110 is provided with at least one row of rollers 111, each row of rollers 111 is arranged in parallel, and the rollers 111 are rotatably mounted on the first bearing portion 110.

[0035] A handle 120 and a traction rod 130 are provided at one end of the first bearing part 110, and a lock buckle 140 is provided at the other end. The handle 120 is fixedly mounted on the first bearing part 110, and one end of the traction rod 130 is hinged on the first bearing part 110 and the other end is cantilevered, that is, the traction rod 130 can rotate relative to the first bearing part 110. The lock buckle 140 is fixedly mounted on the first bearing part 110, and a through hole is provided on the lock buckle 140.

[0036] Specifically, Figure 3 As shown, the lock buckle 140 includes an upper page 141, a lower page 142 and a buckle wing 143. The upper page 141 and the lower page 142 are fixedly connected to one end of the first bearing part 110. The upper page 141 is located above the lower page 142 in parallel. The upper page 141 and the top surface of the first bearing part 110 are flush. One end of the lower page 142 is connected to one end of the first bearing part 110, and the other end is connected to the buckle wing 143. The buckle wing 143 and the lower page 142 are connected to form an L shape, and the buckle wing 143 protrudes downward from the lower page 142. Through holes are provided on both the upper page 141 and the lower page 142.

[0037] A plurality of transfer carts 100 can be connected end to end. Specifically, among two adjacent transfer carts 100, the traction rod 130 of one transfer cart 100 is connected to the lock 140 of the adjacent transfer cart 100. The traction rod 130 can be buckled on the lock 140, or the two can be connected together by a pin passing through both the traction rod 130 and the lock 140.

[0038] Wheels are provided at the bottom of the first bearing portion 110 to facilitate pushing the transfer cart 100 .

[0039] In this embodiment, the transfer vehicle 100 is an unpowered tractor.

[0040] like Figure 4 As shown, the universal ball conveying platform 200 includes a second bearing part 210, a limit device 230, a driving member 220 and a base. The base connects and supports the second bearing part 210, and the second bearing part 210 is used to support and carry the workpiece 500. The top surface of the second bearing part 210 is covered with universal balls. The second bearing part 210 is a rectangular parallelepiped with a very thin thickness as a whole, which can be regarded as a plate. Furthermore, the second bearing part 210 is a square plate-like structure, which is convenient for splicing multiple universal ball conveying platforms 200 according to the terrain. When the transfer trolley 100 and the universal ball conveying platform 200 are both supported on the ground, the top surface of the first bearing part 110 and the top surface of the second bearing part 210 are flush and parallel to the horizontal plane.

[0041] The limiting device 230 is used to limit the moving transfer trolley 100 so that the transfer trolley 100 and the universal ball conveying platform 200 are connected together in a set manner. The limiting device 230 is located below the second bearing portion 210, and one end of the limiting device 230 is hinged on the base and the other end is cantilevered, that is, the limiting device 230 can rotate relative to the base. A connecting groove is provided at the cantilevered end of the limiting device 230. The limiting device 230 is also connected to the elastic member and the driving member 220. The two ends of the elastic member are respectively connected to the base and the limiting device 230. The driving member 220 is installed on the base, and one end of the driving member 220 is connected to the limiting device 230, and the other end is connected to the external pedal through a brake line. When the pedal is stepped on, the drive is transmitted to the driving member 220, and the driving member 220 drives the limiting device 230 to rotate.

[0042] The lock 140 of the transfer trolley 100 can be inserted into the connecting groove of the overhanging end of the limiting device 230, and the limiting device 230 is pressed against the lock 140 under the elastic force of the elastic member, so that the transfer trolley 100 and the universal ball conveying platform 200 are fixedly connected together.

[0043] Furthermore, a limiting groove is provided on the side of the second bearing portion 210. When pushing the transfer cart 100, the lock buckle 140 is aligned with the limiting groove and the transfer cart 100 is continued to be pushed. The upper page 141 will enter the limiting groove and the buckling wing 143 will automatically insert into the connecting groove of the limiting device 230.

[0044] The lifting machine 300 cooperates with the universal ball conveying platform 200 to support and lift the workpiece 500 input by the universal ball conveying platform 200. Figure 5 As shown, the lifting machine 300 includes a lifting seat 310, a support seat 320 and a lifting mechanism, wherein the lifting mechanism is installed on the lifting seat 310, and the lifting mechanism is connected to and drives the support seat 320 to rise or fall. The lifting mechanism can adopt a screw transmission mechanism in the prior art. There is also a sensor on the lifting seat 310 for detecting the workpiece 500.

[0045] like Figure 5 As shown, the crane 400 is located above the lifting machine 300. The crane 400 includes a crane body 402 and an electric cylinder 401, a cantilever 403, a lifting claw 404, a synchronous belt 405, a synchronous wheel 406, and an electromagnetic damper 407 installed on the crane body 402. The crane body 402 is installed on the top of the support 310. The lifting claw 404 is used to grab the workpieces 500 one by one. The length of the cantilever 403 is parallel to the horizontal plane. The lifting claw 404 is connected to one end of the cantilever 403. The cantilever 403 can be raised and lowered and moved horizontally, driving the lifting claw 404 to be raised and lowered and moved horizontally synchronously, so as to transfer the workpieces 500 on the support seat 320 to the target workstation one by one.

[0046] The crane body 402 is provided with a first slide rail 408 perpendicular to the horizontal plane, and a first slider 409 is slidably provided on the first slide rail 408. The electric cylinder 401 is connected to and drives the first slider 409 to reciprocate linearly along the first slide rail 408. At least one second slider 410 is fixedly provided on the first slider 409, and two second slide rails 411 are provided on the back of the cantilever 403. The second slider 410 and the second slide rail 411 are slidably matched, so that the cantilever 403 can reciprocate horizontally.

[0047] like Figure 6 As shown, a synchronous belt 405, a synchronous wheel 406, and an electromagnetic damper 407 are also provided on the back of the cantilever 403. There are two synchronous wheels 406, which are rotatably mounted on the back of the cantilever 403. The synchronous belt 405 is tensioned on the two synchronous wheels 406, and the synchronous belt 405 and the synchronous wheel 406 can transmit drive. The electromagnetic damper 407 is coaxially connected to one of the synchronous wheels 406. A synchronous belt clamp is fixedly mounted on the first slider 409, and the synchronous belt clamp clamps the synchronous belt 405 but does not affect the transmission of the synchronous belt 405 on the synchronous wheel 406.

[0048] Hanging claw 404 Figure 7 and 8 As shown, it includes a main rod 4041, a first lifting seat 4042, a second lifting seat 4043, a first connecting rod 4044, a second connecting rod 4045, a recovery handle 4046 and a spring 4047. The first lifting seat 4042 and the second lifting seat 4043 are installed on the main rod 4041 in a liftable manner. The spring 4047 is sleeved on the main rod 4041, and the spring 4047 is located between the second lifting seat 4043 and the first lifting seat 4042. The first connecting rod 4044 and the second connecting rod 4045 are hinged to form a connecting rod group, one end of the connecting rod group is hinged to the second lifting seat 4043, the middle part is hinged to the first lifting seat 4042, and the other end is used to hook the workpiece 500. The main rod 4041 is provided with a limiting member for limiting the first lifting seat 4042. The first lifting seat 4042 is located between the second lifting seat 4043 and the limiting member. The limiting member prevents the first lifting seat 4042 from slipping off the main rod 4041 and prevents the first lifting seat 4042 from continuing to move in a direction away from the second lifting seat 4043. The first lifting seat 4042 is located below the second lifting seat 4043.

[0049] The first lifting seat 4042 includes a sleeve and at least two hinged rods, the sleeve is slidably sleeved outside the main rod 4041, one end of the hinged rod is fixedly connected to the sleeve, and the other end is cantilevered outwardly perpendicular to the main rod 4041. The structure of the second lifting seat 4043 is the same as that of the first lifting seat 4042, except that the length of the hinged rod of the first lifting seat 4042 is greater than the length of the hinged rod of the second lifting seat 4043.

[0050] In this embodiment, the first lifting seat 4042 and the second lifting seat 4043 are both provided with three hinged rods, and the three hinged rods are radially connected to the sleeve.

[0051] The first connecting rod 4044, the second connecting rod 4045, the hinged rod of the first lifting seat 4042, and the hinged rod of the second lifting seat 4043 are the same in number. An hinged rod of the second lifting seat 4043, a first connecting rod 4044, a second connecting rod 4045, and an hinged rod of the first lifting seat 4042 are hinged in sequence. Specifically, one end of the first connecting rod 4044 is hinged to an hinged rod of the second lifting seat 4043, and the other end is hinged to one end of the second connecting rod 4045. The middle part of the second connecting rod 4045 is hinged to an overhanging end of an hinged rod of the first lifting seat 4042. The other end of the second connecting rod 4045 is provided with an outward hook 4048.

[0052] The restoration handle 4046 is fixedly connected to the sleeve of the first lifting seat 4042 .

[0053] Furthermore, the hanging claw 404 can rotate relative to the cantilever 403 to achieve fine adjustment of the position of the hanging claw 404. Figure 7 As shown, the main rod 4041 is connected to one end of the cantilever 403 through the rotating seat 412, the first connecting rod 413 and the second connecting rod 414. One end of the first connecting rod 413 is fixedly connected to one end of the cantilever 403, and the other end is suspended downward, and the length direction of the first connecting rod 413 is perpendicular to the length direction of the cantilever 403. The second connecting rod 414 is installed at the lower end of the first connecting rod 413 through auxiliary mounting parts such as sleeves, and the length direction of the second connecting rod 414 is parallel to the length direction of the first connecting rod 413. The lower end of the second connecting rod 414 and the upper end of the main rod 4041 are both connected to the rotating seat 412, and the straight line where the second connecting rod 414 is located is parallel to the straight line where the main rod 4041 is located. The rotating seat 412 can rotate around the second connecting rod 414 under the drive of external force.

[0054] It should be noted that the workpiece 500 to be transferred is not directly contacted and supported on the first bearing part 110 and the second bearing part 210, but is supported and transferred by the tooling. The tooling includes a base and a support. The base is directly contacted and supported on the first bearing part 110 or the second bearing part 210. The support is located above the base. The support directly contacts and supports the workpiece 500, and there is at least one interval on the support. The support seat 320 includes at least two support plates arranged at intervals in the same plane. One end of the support seat 320 can be inserted between the base and the support of the tooling and can rise. When the support seat 320 rises, each support plate passes through each interval on the support. In addition, in order to ensure that a stack of workpieces 500 are stably supported on the tooling, a vertical rod perpendicular to the horizontal plane is also provided on the base, and the vertical rod passes through the center of a stack of annular workpieces 500.

[0055] Based on the above structure, the working principle and process of the utility model are as follows:

[0056] In the first step, a tool is supported on the first carrying portion 110 , and the workpieces 500 stacked in a pile are placed on the tool.

[0057] In the second step, the transfer trolley 100 is pushed manually or by automatic equipment to the fixed connection universal ball conveying platform 200. Specifically, after aligning the lock buckle 140 with the limiting groove on the side of the universal ball conveying platform 200, the transfer trolley 100 is continued to be pushed, the upper page 141 will be inserted into the limiting groove, the buckle wing 143 contacts and presses down the overhanging end of the limiting device 230 until the buckle wing 143 is inserted into the connection groove of the limiting device 230, and the limiting device 230 presses the buckle wing 143 under the elastic force of the elastic member, so as to realize the automatic locking of the transfer trolley 100 and the universal ball conveying platform 200.

[0058] The third step is to push the tooling on the transfer cart 100 manually or through equipment, and the tooling drives a stack of workpieces 500 supported by it to move along the roller 111. After the tooling is pushed onto the universal ball conveying platform 200, it is continued to be pushed until the support seat 320 is inserted between the base and the support of the tooling.

[0059] In the fourth step, the lifting mechanism starts to drive the support base 320 to rise, and the support base 320 contacts, supports and lifts a stack of workpieces 500 after passing through the support of the tooling. When the support base 32 rises to the point where the sensor of the lifting base 310 detects the top workpiece 500, the lifting mechanism stops.

[0060] The fifth step is to manually push the cantilever 403 so that the cantilever 403 moves parallel to the horizontal plane until the hanging claw 404 is located directly above the stack of workpieces 500 and then stops.

[0061] In this step, mechanical limit components are provided on the crane body 402 and the cantilever 403. When the cantilever 403 moves to the point where the mechanical limit components on the cantilever 403 contact the mechanical limit components on the crane body 402, the cantilever 403 is blocked and stops moving horizontally. At this time, the hanging claw 404 is located directly above a pile of workpieces on the support seat 320. During the horizontal movement of the cantilever 403, the synchronous belt clamping member fixes the synchronous belt 405, and the distance between the clamping point and the synchronous wheel 406 changes, so that the synchronous belt 405 drives the synchronous wheel 406 to rotate, and the conductor in the electromagnetic damper 407 is driven to move by the synchronous wheel 406 connected thereto. The induced current causes the conductor to be subjected to an Ampere force, and the direction of this Ampere force always hinders the movement of the conductor, thereby generating a damping effect on the rotation of the synchronous wheel 406, and then generating a damping effect on the horizontal movement of the cantilever 403 through the synchronous belt 405.

[0062] In the sixth step, the electric cylinder 401 drives the first slider 409 to descend, and then drives the cantilever 403 to descend until the claw 404 extends into and passes through the central through hole of the top workpiece 500, and then the hook 4048 of the second connecting rod 4045 hooks the top workpiece 500.

[0063] In this step, the electric cylinder 401 can be started manually, and the moving distance of the drive shaft of the electric cylinder 401 can be preset, that is, the descending and ascending distances of the cantilever 403 can be preset. After the electric cylinder 401 is started, the cantilever 403 descends until the claw 404 extends into and passes through the central through hole of the topmost workpiece 500, and the electric cylinder 401 automatically stops.

[0064] The electric cylinder 401 can also be automatically started. Specifically, a sensor is provided. When the sensor detects that the lifting claw 404 is located directly above the support seat 320 , the controller controls the electric cylinder 401 to start.

[0065] In this embodiment, the hook 4048 of each second link 4045 is located on the circumference of the same circle, and the diameter of the circle is slightly larger than the inner diameter of the annular workpiece 500. The end of the second link 4045 is set as an inclined surface extending toward the outer and upper part of the circle. In this way, when the hanging claw 404 descends, the inner circle of the workpiece 500 contacts and squeezes the end of the second link 4045, and the second link 4045 rotates around the hinge point between it and the first lifting seat 4042, so that the diameter of the circle where the hook 4048 of each second link 4045 is located is reduced, and the second link 4045 pulls the first link 4044, and the first link 4044 pulls the second lifting seat 4043, and the second lifting seat 4043 descends to compress the spring 4047. The second link 4045 is squeezed and rotated by the inner circle of the workpiece 500 and passes through the central through hole of the workpiece 500. Then, the end of one overhanging end of the second connecting rod 4045 is separated from the contact with the inner circle of the workpiece 500, the extrusion force disappears, the compressed spring 4047 recovers and pushes the second lifting seat 4043 to rise and reset, the second lifting seat 4043 drives the first connecting rod 4044, and the first connecting rod 4044 drives the second connecting rod 4045 to reset, so that the diameter of the circle where the hook 4048 of each second connecting rod 4045 is located increases, and the hook 4048 hooks out the workpiece 500.

[0066] In the seventh step, the electric cylinder 401 drives the first slide block 409 to rise, and then drives the cantilever 403 to rise to the set position and stop. The hanging claw 404 drives the workpiece 500 hooked thereon to rise.

[0067] In this step, each second connecting rod 4045 is subjected to the downward gravity of the workpiece 500, so that the second connecting rod 4045 tends to rotate, the first connecting rod 4044 is subjected to the pulling force of the second connecting rod 4045, the second lifting seat 4043 is subjected to the oblique downward pulling force of the first connecting rod 4044, and the compressed spring 4047 has an upward supporting force on the second lifting seat 4043. When the supporting force and the downward pulling force are balanced, the state of the lifting claw 404 at this time can be maintained, and the self-locking of the lifting claw 404 can be realized, that is, the workpiece 500 will not fall off the lifting claw 404 during the lifting process of the lifting claw 404.

[0068] In this step, after the top workpiece 500 of the stack of workpieces on the support seat 320 is removed, the lifting mechanism automatically starts and the support seat 320 rises. When the top workpiece 500 is detected by the sensor, the controller controls the lifting mechanism to automatically stop. In other words, the top workpiece 500 of the stack of workpieces 500 on the support seat 320 is always at the set height.

[0069] In the eighth step, the cantilever 403 is manually pulled to move the cantilever 403 parallel to the horizontal plane until the workpiece 500 on the claw 404 moves to the target workstation. After the workpiece 500 is supported on the target workstation, the worker at the workstation pulls the recovery handle 4046 upwards and the claw 404 is pulled out from the workpiece 500.

[0070] It should be noted that the universal ball conveying platform 200 adopts a modular design and can be freely overlapped according to actual needs, and multiple universal ball conveying platforms 200 can be spliced ​​into different shapes and sizes. In addition, the electromagnetic damper 407 can be replaced by a motor, and the cantilever 403 can be automatically driven to achieve horizontal movement. Specifically, the motor drives a synchronous wheel 406 connected to it to rotate, and the cantilever 403 can be moved horizontally through the transmission of the synchronous belt 405. When it is necessary to separate the transfer trolley 100 and the universal ball conveying platform 200, step on the pedal connected to the drive member 220, and the drive member 220 drives the limit device 230 to rotate, so that the buckle wing 143 leaves the limit device 230, and the transfer trolley 100 can be pushed away.

[0071] Finally, it is necessary to explain here that the above embodiments are only used to further illustrate the technical solution of the utility model in detail and cannot be understood as limiting the protection scope of the utility model. Some non-essential improvements and adjustments made by technicians in this field based on the above content of the utility model belong to the protection scope of the utility model.

Claims

1. A ring-shaped workpiece transfer system, characterized in that: The invention comprises a transfer trolley (100), a universal ball conveying platform (200), an elevator (300), and a crane (400). The universal ball conveying platform (200), the elevator (300), and the crane (400) are connected in sequence. The transfer trolley (100) can be moved to contact the universal ball conveying platform (200) and automatically locked with the universal ball conveying platform (200) through the elastic force of an elastic member. The annular workpiece (500) loaded on the transfer trolley (100) can be driven by a person or equipment to pass through the universal ball conveying platform (200) and then transferred to the elevator (300). The elevator (300) lifts the workpiece (500) to a set position. The crane (400) comprises a lifting claw (404). The lifting claw (404) passes through the central through hole of the workpiece (500) at the set position through horizontal movement and lifting movement and then hooks the workpiece (500), and then transfers the workpiece (500) to a target workstation.

2. The annular workpiece transfer system according to claim 1, characterized in that: The transfer trolley (100) comprises a first bearing part (110) for bearing a workpiece (500) to be transferred, and at least one row of rotatable rollers (111) is arranged on the first bearing part (110). The universal ball conveying platform (200) comprises a second bearing part (210) for supporting and bearing the workpiece (500), and a universal ball is arranged on the top surface of the second bearing part (210). When the transfer trolley (100) and the universal ball conveying platform (200) are both supported on the ground, the top surface of the first bearing part (110) and the top surface of the second bearing part (210) are flush and parallel to the horizontal plane.

3. The annular workpiece transfer system according to claim 1, characterized in that: The transfer trolley (100) is provided with a lock buckle (140), and the universal ball conveying platform (200) is provided with a limit device (230). The limit device (230) is rotatable and provided with a connecting groove. The limit device (230) is also connected to an elastic member and a driving member (220). One end of the driving member (220) is connected to the limit device (230) and the other end is connected to an external pedal. When the pedal is stepped on, the drive is transmitted to the driving member (220), and the driving member (220) drives the limit device (230) to rotate. When the transfer trolley (100) moves toward the universal ball conveying platform (200), the lock buckle (140) can contact and push the limit device (230), so that the elastic member is squeezed or stretched and the limit device (230) rotates, until the lock buckle (140) moves along the limit device (230) and is inserted into the connecting groove.

4. The annular workpiece transfer system according to claim 1, characterized in that: The lifting machine (300) comprises a lifting seat (310), a lifting mechanism and a support seat (320) for supporting a workpiece (500). The lifting mechanism is installed on the lifting seat (310), and the lifting mechanism is connected to and drives the support seat (320) to rise or fall. The lifting seat (310) also has a sensor for detecting the workpiece (500).

5. The annular workpiece transfer system according to claim 1, characterized in that: The crane (400) comprises a crane body (402) and an electric cylinder (401), a cantilever (403) and a lifting claw (404) installed on the crane body (402); a first slide rail (408) perpendicular to a horizontal plane is provided on the crane body (402); a first slider (409) is slidably provided on the first slide rail (408); the electric cylinder (401) is connected to and drives the first slider (409) to move back and forth along the first slide rail (408); at least one second slider (410) is fixedly provided on the first slider (409); a second slide rail (411) parallel to the horizontal plane is provided on the back of the cantilever (403); the second slider (410) and the second slide rail (411) are slidably matched; and the lifting claw (404) is connected to one end of the cantilever (403).

6. The annular workpiece transfer system according to claim 5, characterized in that: The back of the cantilever (403) is also provided with a synchronous belt (405), a synchronous wheel (406), and an electromagnetic damper (407). There are two synchronous wheels (406), which are rotatably mounted on the back of the cantilever (403). The synchronous belt (405) is tensioned on the two synchronous wheels (406). The synchronous belt (405) and the synchronous wheel (406) can transmit drive. The electromagnetic damper (407) is coaxially connected to one of the synchronous wheels (406). A synchronous belt clamp is fixedly mounted on the first slider (409), and the synchronous belt clamp clamps the synchronous belt (405) but does not hinder the relative transmission between the synchronous belt (405) and the synchronous wheel (406).

7. The annular workpiece transfer system according to claim 6, characterized in that: The electromagnetic damper (407) is replaced by a motor, which can drive a synchronous wheel (406) connected thereto to rotate.

8. The annular workpiece transfer system according to claim 5, characterized in that: The hanging claw (404) comprises a main rod (4041), a first lifting seat (4042), a second lifting seat (4043), a first connecting rod (4044), a second connecting rod (4045) and a spring (4047). The first lifting seat (4042) and the second lifting seat (4043) are installed on the main rod (4041) in a liftable manner. The spring (4047) is sleeved on the main rod (4041). The spring (4047) is located between the second lifting seat (4043) and the first lifting seat. A first connecting rod (4044) and a second connecting rod (4045) are hingedly connected to form a connecting rod group, one end of the connecting rod group is hingedly connected to the second lifting seat (4043), the middle part is hingedly connected to the first lifting seat (4042), and the other end is used to hook the workpiece (500), and a limiting member for limiting the first lifting seat (4042) is provided on the main rod (4041), and the first lifting seat (4042) is located between the second lifting seat (4043) and the limiting member.

9. The annular workpiece transfer system according to claim 8, characterized in that: The connecting rod group is provided with at least two groups, one end of the first connecting rod (4044) is hinged to the second lifting seat (4043), and the other end is hinged to one end of the second connecting rod (4045), the middle part of the second connecting rod (4045) is hinged to the first lifting seat (4042), and the other end of the second connecting rod (4045) is provided with an outward-facing hook (4048), when the hanging claw (404) is not subjected to external force, the hooks (4048) of all the connecting rod groups are located on the circumference of the same circle, and the diameter of the circle is greater than the inner diameter of the annular workpiece.

10. The annular workpiece transfer system according to claim 8, characterized in that: The lifting claw (404) further includes a recovery handle (4046), and the recovery handle (4046) is fixedly connected to the first lifting seat (4042).

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