Pull rod rotary conveying device

Abstract

The utility model relates to the field of conveying devices, and discloses a pull rod rotating and conveying device which comprises a rotating piece arranged in a horizontally rotating mode, a bearing part arranged on the rotating piece and used for bearing pull rods released by a mechanical arm in the previous working procedure and a position switching assembly. The position switching assembly comprises a cache delivery assembly and a driving assembly, the cache delivery assembly can cache a plurality of pull rods and deliver the pull rods to the mechanical arm of the next working procedure one by one, the driving assembly drives the rotating part to rotate or ascend and descend in the circumferential direction, the rotating part is a rotating ring, and the cache delivery assembly is located in an inner ring of the rotating ring; and when the bearing part rotates to the feeding end of the cache delivery assembly and the axis of the pull rod on the bearing part is perpendicular to the delivery direction of the cache delivery assembly, the bearing part descends, and the pull rod is placed on a second workpiece positioning bearing position of the cache delivery assembly. And the circulation continuity and the circulation efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the field of conveying devices, in particular to a pull rod rotating conveying device. Background Art

[0002] Due to space considerations, a production line with multiple processes cannot be arranged in a straight line. Therefore, the multiple processes need to be distributed at least at two angles. Once the angle between processes changes, it is obviously impossible to achieve the flow of workpieces between processes using old-fashioned robotic arms that cannot twist or rotate.

[0003] The specific structure of the old-style robotic arm that cannot rotate or twist can refer to the three-axis robotic arm automatic grasping device disclosed in the Chinese patent application text with application number 201410357626.8. This old-style robotic arm generally includes an X-axis motion mechanism, a Y-axis motion mechanism and a Z-axis motion mechanism. The end clamp is installed at the bottom of the Z-axis motion mechanism, which is generally an air gripper and a grasping cylinder that controls the opening and closing of the air gripper. The X-axis motion mechanism, the Y-axis motion mechanism and the Z-axis motion mechanism are generally existing screw slide assemblies.

[0004] The above-mentioned robotic arms can only perform three-dimensional displacement and grasp and place workpieces within one workstation or between multiple workstations set in parallel. Once the angle between the workstations changes, the flow node will be disconnected, causing the assembly line to be unable to operate. Utility Model Content

[0005] The utility model addresses the disadvantage in the prior art that in an assembly line using an old-fashioned robotic arm that cannot be twisted, workpieces cannot flow between two workstations set at an angle, so the assembly line can only be arranged in a straight line, resulting in low space utilization. The utility model provides a pull rod rotating conveying device that is applied to the assembly line and can transfer workpieces between two workstations set at an angle.

[0006] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0007] The pull rod rotating conveying device includes a horizontally rotating rotating part, a receiving part arranged on the rotating part for receiving the pull rod released by the robot arm of the previous process, and a position switching assembly for receiving the pull rods delivered by the receiving part one by one and delivering the pull rods one by one to the picking position of the robot arm of the next process while caching. The position switching assembly includes a cache delivery component that can cache a number of pull rods and deliver the pull rods one by one to the robot arm of the next process, and a driving assembly that drives the rotating part to rotate circumferentially or lift and lower. The rotating part is a swivel, and the cache delivery component is located in the inner ring of the swivel. When the receiving part rotates to the feed end of the cache delivery component and the axis of the pull rod on it is perpendicular to the delivery direction of the cache delivery component, the receiving part descends and the pull rod is placed on a second workpiece positioning receiving position of the cache delivery component.

[0008] With the above scheme, after the receiving component receives the pull rod released by the robot arm of the previous process, under the action of the position switching assembly, the pull rod first rotates to the feed end of the cache delivery component through the rotating component. As the receiving component descends, the cache delivery component naturally advances to a second workpiece positioning and receiving position, and the pull rod is released just to an empty second workpiece positioning and receiving position. The receiving component rises and the rotating component continues to rotate until the receiving component is again aligned with the unloading position corresponding to the robot arm of the previous process. The advantage of setting up a cache delivery component is that it can not only realize the conversion of the pull rod position for the robot arm of the next process to pick up, but also temporarily store multiple pull rods and deliver them one by one to the picking position of the robot arm of the next process. In the above, if there is no cache delivery component, the robot arm can basically not achieve synchronization of operations in the two processes. The time difference between the two processes will cause waiting between the processes, which not only affects efficiency, but also causes frequent program feedback, increasing the complexity of program control. After the cache delivery component is set, the robot arm of the previous process can continue to release the pull rod without waiting, and the robot arm of the next process can wait until a sufficient number of pull rods are cached on the cache delivery component before starting and continuously taking them. It is impossible to frequently switch between start or standby. Therefore, the device can not only realize the flow of pull rods between two processes set at an angle, but also improve the continuity and efficiency of the flow.

[0009] Preferably, the cache delivery assembly includes a fixed frame and at least two groups of conveyor belts arranged in parallel and spaced apart on the fixed frame and conveying synchronously. The outer annular surface of the conveyor belt is fixed with first V-shaped blocks with openings facing outward at circumferential intervals, and the corresponding first V-shaped blocks on adjacent conveyor belts jointly form a second workpiece positioning and receiving position.

[0010] By adopting the above scheme and setting the conveying speed of the conveyor belt, it can be achieved that every time the receiving component descends, there is an empty second workpiece positioning receiving position running to the feed end of the conveyor belt, and the pull rod on the receiving component just overlaps the second workpiece positioning receiving position.

[0011] Preferably, the receiving component includes a receiving rod arranged horizontally and in parallel, one end of the receiving rod is fixed to the upper end surface of the swivel and the other end of the receiving rod is suspended and facing the inside of the swivel, and a second V-shaped block with an opening facing upward is fixed between the receiving rods corresponding to the suspended end of the receiving rod. The second V-shaped blocks of adjacent receiving rods jointly form a first workpiece receiving position. When the receiving component rotates to the feed end of the transmission belt and the axis of the pull rod thereon is perpendicular to the transmission direction of the conveyor belt, as the second V-shaped block descends, there is just an empty second workpiece positioning receiving position for receiving a pull rod released by the second V-shaped block.

[0012] Using the above solution, the suspended end of the receiving rod uses a second V-shaped block to support the positioning pull rod, and as the swivel rotates, the suspended section of the receiving rod is inserted into the gap of the conveyor belt. As the receiving rod descends, the pull rod on the second V-shaped block is naturally placed on the first V-shaped block at the feed end of the conveyor belt.

[0013] Preferably, a first sensor component for sensing whether the receiving component is aligned with the conveyor belt is provided between the swivel and the lifting ring frame, and an adjustment component for eliminating the installation error of the first sensor component by adjusting the installation position of the receiving component on the swivel is provided between the receiving component and the swivel.

[0014] Preferably, the adjustment assembly includes a connecting rod, at least two waist-shaped grooves arranged in parallel and spaced apart along the length direction of the connecting rod, and a clamping component that passes through the waist-shaped grooves and fits tightly with the threaded holes on the swivel and presses the connecting rod against the swivel, and the end of the receiving rod away from the second V-shaped block is vertically fixed to the connecting rod.

[0015] By adopting the above scheme, if there is a deviation in the installation position of the first sensor component or the receiving rod, it will affect the stability of the pull rod released onto the first V-shaped block. By adjusting the position of the receiving rod, the installation errors of the above two can be eliminated, ensuring that when the first sensor component triggers the induction, the receiving rod is located between the conveyor belts and the released pull rod can be stably mounted on the second workpiece positioning receiving position of the conveyor belt.

[0016] Preferably, a lifting ring frame concentric with the swivel is provided on the vertical guide lifting of the fixed frame, and the swivel is rotatably arranged on the lifting ring frame. The driving assembly includes a lifting driving member arranged between the fixed frame and the lifting ring frame for driving the lifting ring frame to lift and lower, and a rotating driving component arranged between the fixed frame and the lifting ring frame for driving the swivel to rotate relative to the lifting ring frame.

[0017] Using the above scheme, the lifting drive component is used to realize the lifting and lowering of the swivel, so that the pull rod on the receiving rod can be naturally released to the second workpiece positioning receiving position on the conveyor belt; the rotating drive assembly is used to realize the rotation of the swivel, and then realize the switching of the receiving rod between the release position of the forward process robot arm and the feed end of the conveyor belt.

[0018] Preferably, the rotary drive assembly includes a drive wheel that rotates horizontally and presses against the ring wall of the rotating ring, a first drive motor fixed to a fixed frame, and a conversion assembly that can change the power output direction of the first drive motor and change the power transmission distance.

[0019] Preferably, the conversion assembly includes a right-angle commutator fixed on the lifting ring frame, a first universal joint arranged between the right-angle commutator and the motor shaft of the first drive motor, and a second universal joint arranged between the right-angle commutator and the central axis of the drive wheel.

[0020] With the above solution, it is safer to install the first drive motor on the fixed frame, and the power output is more stable. Since the lifting ring frame needs to be raised and lowered, and the swivel ring needs to rotate relative to the lifting ring frame, the above-mentioned right-angle commutator can convert the horizontal power output of the first drive motor into vertical power output, and the first universal joint and the second universal joint can adapt to changes in angle and height to achieve stable power output.

[0021] Preferably, the driving wheel rotates and presses against the inner ring wall of the swivel through a floating pressure structure. The floating pressure structure includes a floating seat and a pressure cylinder arranged horizontally. One end of the floating seat is hinged to the lifting ring frame and the other end of the floating seat is hinged to the piston rod end of the pressure cylinder. The cylinder body of the pressure cylinder is hinged to the lifting ring frame and is located at the end of the floating seat away from the hinged end of the lifting ring frame.

[0022] With the above solution, the driving wheel rotates and presses against the inner ring wall of the rotating ring with a large pressure through the pressing cylinder, and uses the friction force of its rotation to drive the rotating ring to rotate, and the aforementioned conversion component can adapt to the floating of the driving wheel's rotation center.

[0023] Preferably, a guide support structure is provided between the swivel and the lifting ring frame to ensure stable rotation of the swivel relative to the lifting ring frame. The upper end of the swivel is vertically folded outward to form a folded ring. The guide support structure includes a first support roller distributed circumferentially around the lifting ring frame and rotatably abutting the lower end surface of the folded ring, and a second support roller distributed circumferentially around the lifting ring frame and rotatably abutting the outer ring wall of the swivel.

[0024] With the above solution, the first supporting roller can form an axial rolling support for the rotating ring, and the second supporting roller can form a radial rolling support for the rotating ring, thereby achieving stable rotation of the rotating ring relative to the lifting ring frame.

[0025] The utility model has significant technical effects due to the adoption of the above technical solutions: the pull rod rotating conveying device includes a rotating part, a receiving part and a position switching assembly arranged horizontally. After the receiving part receives the pull rod released by the robot arm of the previous process, under the action of the position switching assembly, the pull rod first rotates to the feeding end of the cache delivery component through the rotating part. As the receiving part descends, the cache delivery component naturally advances to a second workpiece positioning receiving position, and the pull rod is released to an empty second workpiece positioning receiving position. The receiving part rises and the rotating part continues to rotate until the receiving part is aligned with the unloading position corresponding to the robot arm of the previous process again. The advantage of setting up a cache delivery component is that it can not only realize the conversion of the pull rod position for the robot arm of the next process to take it, It can also temporarily store multiple pull rods and deliver them one by one to the picking position of the robotic arm of the next process. If there is no cache delivery component, the robotic arm in the two processes can basically not achieve synchronization of operations. The time difference in coordination between the two will cause waiting between the processes, which not only affects efficiency, but also causes frequent program feedback, increasing the complexity of program control. After the cache delivery component is set, the robotic arm of the previous process can continue to release the pull rods without waiting, and the robotic arm of the next process can wait until a sufficient number of pull rods are cached on the cache delivery component before starting and picking them continuously. It is impossible to frequently switch between start or standby. Therefore, the device can not only realize the flow of pull rods between two processes set at an angle, but also improve the continuity and efficiency of the flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is an axonometric diagram of the cache delivery component of this embodiment;

[0027] Figure 2 This is an axonometric view of the pull rod rotary conveyor device of this embodiment with the buffer delivery assembly removed;

[0028] Figure 3 This is an axonometric view of the pull rod rotary conveyor device of this embodiment;

[0029] Figure 4 is a top view of the pull rod rotary conveying device of this embodiment;

[0030] Figure 5 This is a front view of the pull rod rotary conveyor device of this embodiment;

[0031] Figure 6 This is an axonometric view of the rotary drive assembly and the floating pressure structure of this embodiment when in cooperation;

[0032] Figure 7 It is a partial exploded view of the receiving component of this embodiment.

[0033] The parts designated by the numbers in the above drawings are as follows: 1. fixed frame; 2. guide rail; 3. support plate; 4. conveyor belt; 5. synchronous chain; 6. second drive motor; 7. drive gear; 8. driven gear; 9. rotating shaft; 10. synchronous roller; 11. first V-shaped block; 12. second sensor; 13. lifting ring frame; 131. base; 14. rotating ring; 15. folding ring; 16. first sensor assembly; 161. first sensor; 162. first sensing plate; 17. slider; 18 , lifting drive cylinder; 19, receiving rod; 20, second V-shaped block; 21, connecting rod; 22, first support roller; 23, second support roller; 24, first drive motor; 25, first universal joint; 26, right-angle commutator; 27, second universal joint; 28, floating seat; 29, drive wheel; 291, center shaft; 30, pressure cylinder; 31, waist-shaped groove; 32, clamping component; 321, adjusting guide block; 322, upper stud; 323, lower stud; 324, pressure cap. DETAILED DESCRIPTION

[0034] The present invention is described in further detail below with reference to the accompanying drawings and embodiments.

[0035] Rod rotary conveyor, see Figures 1 to 7 As shown, it includes a fixed frame 1, a lifting ring frame 13 that is vertically guided and lifted on the fixed frame 1, and a swivel 14 that rotates concentrically on the lifting ring frame 13. Guide rails 2 are vertically fixed on all sides of the fixed frame 1. A base 131 is fixed at the bottom of the lifting ring frame 13. A guide block embedded in the guide rail 2 is fixed on the base 131. A receiving component for receiving the pull rod released by the robot arm of the previous process is fixed on the swivel 14. Four groups of receiving components are evenly spaced around the circumference of the swivel 14. The receiving component includes a horizontally and parallel receiving rod 19. One end of the receiving rod 19 is fixed to the upper end surface of the swivel 14 and the other end of the receiving rod 19 is suspended and faces the inside of the swivel 14. A second V-shaped block 20 with an opening facing upward is fixed between the receiving rods 19 and at the corresponding end of the suspended receiving rod 19.

[0036] A position switching assembly is provided between the fixed frame 1, the lifting ring frame 13 and the rotating ring 14, which can be used to receive the pull rods delivered by the receiving components one by one and deliver the pull rods one by one to the picking position of the robot arm of the next process while caching them. A driving assembly is provided between the base 131, the lifting ring frame 13 and the rotating ring 14, which is used to drive the rotating ring 14 to rotate around the lifting ring frame 13 or to lift the lifting ring frame 13 relative to the fixed frame 1.

[0037] The position switching assembly includes a buffer delivery component disposed on the fixed frame 1 and located inside the rotating ring 14, see Figure 1 and Figure 3As shown, the cache delivery component can cache several pull rods and deliver the pull rods one by one to the robotic arm of the next process. The cache delivery component includes three groups of conveyor belts 4 that are arranged in parallel and at intervals on the fixed frame 1 and convey synchronously. A support plate 3 for supporting the conveyor belt 4 is fixed on the fixed frame 1. The synchronous movement of the conveyor belt 4 is controlled by a synchronous drive component. The outer ring surface of the conveyor belt 4 is fixed with first V-shaped blocks 11 with openings facing outward at circumferential intervals. The corresponding first V-shaped blocks 11 on adjacent conveyor belts 4 jointly form a second workpiece positioning and receiving position, and the second V-shaped blocks of adjacent receiving rods 19 jointly form a first workpiece receiving position. When the receiving component rotates to the feed end of the transmission belt 4 and the axis of the pull rod thereon is perpendicular to the conveying direction of the conveyor belt 4, the receiving rod 19 is inserted into the gap between the adjacent conveyor belts 4. When the second V-shaped block 20 on the receiving rod 19 descends, there is just a second workpiece positioning and receiving position that runs to the bottom of the second V-shaped block 20 to receive a pull rod released by the descent of the second V-shaped block 20.

[0038] See Figure 1 As shown, the synchronous drive assembly includes a rotating shaft 9 located at both ends of the conveyor belt 4 and rotatably arranged on the fixed frame 1, three synchronous rollers 10 for driving the conveyor belt 4 that coaxially rotate on the rotating shaft 9 and are distributed at intervals, and a driven gear 8 coaxially fixed to one of the rotating shafts 9. A second drive motor 6 is fixed on the fixed frame 1, and a drive gear 7 is coaxially fixed on the motor shaft of the second drive motor 6. A synchronous chain 5 is engaged between the drive gear 7 and the driven gear 8. When the second drive motor 6 rotates, it can drive the three groups of synchronous conveyor belts 4 to rotate synchronously.

[0039] Combine Figure 2 and Figure 6As shown, the drive assembly includes a lifting drive member arranged between the fixed frame 1 and the lifting ring frame 13 for driving the lifting ring frame 13 to rise and fall, and a rotation drive component arranged between the fixed frame 1 and the lifting ring frame 13 for driving the swivel 14 to rotate relative to the lifting ring frame 13. The lifting drive member is a lifting drive cylinder 18, the cylinder body of the lifting drive cylinder 18 is fixed on the fixed frame 1, and the piston rod of the lifting drive cylinder 18 is vertically upward and the end is fixed on the base 131 of the lifting ring frame 13; the rotation drive component includes a driving wheel 29 that rotates horizontally and presses against the ring wall of the swivel, a first driving motor 24 fixed on the fixed frame, and a conversion component that can change the power output direction of the first driving motor 24 and change the power transmission distance. The conversion component includes a right-angle commutator 26 fixed on the lifting ring frame 13, and a motor shaft arranged between the right-angle commutator 26 and the motor shaft of the first driving motor. The first universal coupling 25 and the second universal coupling 27 arranged between the right-angle commutator 26 and the central axis 291 of the driving wheel 29, the driving wheel 29 rotates and presses on the inner ring wall of the swivel 14 through a floating pressing structure, the floating pressing structure includes a floating seat 28 and a pressing cylinder 30 arranged horizontally in a floating manner, one end of the floating seat 28 is hinged to the lifting ring frame 13 and the other end of the floating seat 28 is hinged to the piston rod end of the pressing cylinder 30, the cylinder body of the pressing cylinder 30 is hinged to the lifting ring frame 13 and is located at the end of the floating seat 28 away from the hinged end of the lifting ring frame 13, the above-mentioned rotation drive assembly can realize the free rotation of the swivel 14 relative to the lifting ring frame 13 during the free lifting of the lifting ring frame 13, and there is no need to change the setting position of the first drive motor 24, so that the first drive motor 24 has a stable output, thereby ensuring the stable operation of the overall structure.

[0040] A guide support structure is provided between the swivel 14 and the lifting ring frame 13 to ensure that the swivel 14 rotates stably relative to the lifting ring frame 13. Figure 5 As shown, the guide support structure includes a folded ring 15 formed by vertically folding outward at the upper end of the swivel 14, first support rollers 22 distributed circumferentially around the lifting ring frame 13 and rotatably abutting the lower end surface of the folded ring 15, and second support rollers 23 distributed circumferentially around the lifting ring frame 13 and rotatably abutting the outer ring wall of the swivel 14. The first support rollers 22 can form axial rolling support for the swivel 14, and the second support rollers 23 can form radial rolling support for the swivel 14, thereby realizing stable rotation of the swivel 14 relative to the lifting ring frame 13.

[0041] A first sensor assembly 16 is provided between the rotating ring 14 and the lifting ring frame 13 for sensing whether the receiving component is aligned with the conveyor belt 4. Figure 2As shown, the first sensing component includes a first sensor 161 provided on the outer ring wall of the lifting ring frame 13 and four first sensing pads 162 axially evenly spaced and protruding from the outer ring wall of the rotating ring 14. When one of the sensing belts rotates to correspond to the first sensor 161, the first sensor 161 sends a signal to the controller, and the controller controls the first drive motor 24 to stop rotating. An adjustment component is provided between the receiving component and the rotating ring 14 to eliminate the installation error of the first sensing component 16 by adjusting the installation position of the receiving component on the rotating ring 14. The adjustment component includes a connecting rod 21, two waist-shaped grooves 31 spaced parallel to each other along the length direction of the connecting rod 21, and a pressing component 32 that passes through the waist-shaped groove 31 and is tightly fitted with the threaded hole on the rotating ring 14 to press the connecting rod 21 against the rotating ring 14. The pressing component 32 includes an adjustment guide block 321 that guides movement in the waist-shaped groove 31, and an upper stud 322 that is integrally protruded at the upper end of the adjustment guide block 321. And a lower stud 323 is integrally provided on the lower end of the adjusting guide block 321, and a nut with an internal thread is welded on the swivel 14. The lower stud 323 is tightly fitted with the nut, and a pressure cap 324 is provided above the connecting rod 21, which is tightly fitted with the upper stud 322 and pressed against the upper end face of the connecting rod 21. The pressure cap 324 is spherical for easy grasping and rotation. The end of the receiving rod 19 away from the second V-shaped block 20 is vertically fixed to the connecting rod 21. If there is a slight error in the installation position of the first sensor 161, the installation error of the first sensor 161 can be eliminated by adjusting the position of the connecting rod 21.

[0042] A second sensor assembly is provided between the fixed frame 1 and the lifting ring frame 13 for limiting the maximum stroke of the lifting ring frame 13 when it is raised and lowered. Figure 1 As shown, the second sensing assembly includes two groups of second sensors 12 fixed on the base and distributed up and down, with at least one second sensor 12 provided in each group. The base of the lifting ring frame 13 rises and falls between the two groups of second sensors 12. When the second sensor 12 at the upper or lower end senses the base, the sensor at the upper or lower end sends a signal to the controller indicating that the base has reached the highest or lowest stroke.

[0043] The operation process of the above-mentioned pull rod rotating conveyor device is as follows:

[0044] 1. After the robot arm of the previous process moves to the workpiece release position, the first drive motor 24 rotates, and the swivel 14 rotates. When the first sensor 161 senses the first sensing lever 162, the controller controls the first drive motor 24 to stop rotating, and the robot arm of the previous process descends, and the pull rod on it naturally falls onto the second V-shaped block 20 of the receiving component;

[0045] 2. The first drive motor 24 continues to rotate, and the receiving rod 19 carrying the pull rod rotates toward the feed end of the conveyor belt 4. When the first sensor 161 senses the first sensing lever 162 again, the receiving rod 19 carrying the pull rod is exactly located in the gap of the conveyor belt 4, and there is another set of empty receiving parts located under the robot arm of the previous process, the controller controls the first drive motor 24 to stop rotating;

[0046] 3. The lifting drive cylinder 18 retracts, the second drive motor 6 starts, and all the receiving rods 19 (including the receiving rods 19 carrying the pull rods) descend synchronously. The conveyor belt 4 runs and an empty workpiece placement position happens to move above the feed end of the conveyor belt 4. The pull rod is naturally released to the first V-shaped block 11 of the workpiece placement position.

[0047] 4. The robotic arm of the previous process descends and releases another pull rod onto the second V-shaped block 20 of the corresponding receiving component;

[0048] 5. Repeat steps 2 to 4.

[0049] 6. When a specified number of tie rods (the specified number can be controlled by the program) is cached on the conveyor belt 4, the robotic arm of the subsequent process moves to the position where it picks up the workpiece (above the discharge end of the conveyor belt 4), and the robotic arm of the subsequent process descends to pick up the tie rods on the conveyor belt 4 one by one.

[0050] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. The pull rod rotating conveying device is characterized by: The invention comprises a rotating part arranged for horizontal rotation, a receiving part arranged on the rotating part for receiving the pull rod released by the robot arm of the previous process, and a position switching assembly for receiving the pull rods delivered by the receiving part one by one and delivering the pull rods one by one to the picking position of the robot arm of the next process while caching them. The position switching assembly comprises a cache delivery component that can cache a plurality of pull rods and deliver the pull rods one by one to the robot arm of the next process, and a driving assembly that drives the rotating part to rotate circumferentially or lift and lower. The rotating part is a rotating ring (14), and the cache delivery component is located in the inner ring of the rotating ring (14). When the receiving part rotates to the feeding end of the cache delivery component and the axis of the pull rod on it is perpendicular to the delivery direction of the cache delivery component, the receiving part descends and the pull rod is placed on a second workpiece positioning receiving position of the cache delivery component.

2. The pull rod rotating conveying device according to claim 1, characterized in that: The buffer delivery assembly comprises a fixed frame (1) and at least two groups of conveyor belts (4) arranged in parallel and spaced apart on the fixed frame (1) and conveying synchronously, wherein first V-shaped blocks (11) with openings facing outward are fixed at circumferential intervals on the outer annular surface of the conveyor belt (4), and the corresponding first V-shaped blocks (11) on adjacent conveyor belts (4) jointly form a second workpiece positioning receiving position.

3. The pull rod rotary conveying device according to claim 2, characterized in that: The receiving component includes a receiving rod (19) arranged horizontally and in parallel, one end of the receiving rod (19) is fixed to the upper end surface of the rotating ring (14) and the other end of the receiving rod (19) is suspended and faces the inside of the rotating ring (14), and a second V-shaped block (20) with an opening facing upward is fixed between the receiving rods (19) and at the corresponding end of the suspended receiving rod (19). The second V-shaped blocks (20) of adjacent receiving rods (19) jointly form a first workpiece receiving position. When the receiving component rotates to the feed end of the conveyor belt (4) and the axis of the pull rod thereon is perpendicular to the conveying direction of the conveyor belt (4), as the second V-shaped block (20) descends, there is just an empty second workpiece positioning receiving position for receiving a pull rod released by the second V-shaped block (20).

4. The pull rod rotary conveying device according to claim 3, characterized in that: A first sensor assembly (16) for sensing whether the receiving component is aligned with the conveyor belt (4) is provided between the rotating ring (14) and the lifting ring frame (13); and an adjustment assembly for eliminating the installation error of the first sensor assembly (16) by adjusting the installation position of the receiving component on the rotating ring (14) is provided between the receiving component and the rotating ring (14).

5. The pull rod rotating conveying device according to claim 4, characterized in that: The adjusting assembly comprises a connecting rod (21), at least two waist-shaped grooves (31) arranged in parallel and spaced apart along the length direction of the connecting rod (21), and a pressing component (32) which passes through the waist-shaped groove (31) and is tightly matched with the threaded hole on the rotating ring (14) and presses the connecting rod (21) against the rotating ring (14); and one end of the receiving rod (19) away from the second V-shaped block (20) is vertically fixed to the connecting rod (21).

6. The pull rod rotating conveying device according to claim 1, characterized in that: A lifting ring frame (13) is vertically guided and lifted on the fixed frame (1) and is concentric with a rotating ring (14). The rotating ring (14) is rotatably arranged on the lifting ring frame (13). The driving assembly comprises a lifting driving member arranged between the fixed frame (1) and the lifting ring frame (13) for driving the lifting ring frame (13) to lift and lower, and a rotating driving component arranged between the fixed frame (1) and the lifting ring frame (13) for driving the rotating ring (14) to rotate relative to the lifting ring frame (13).

7. The pull rod rotary conveying device according to claim 6, characterized in that: The rotary drive assembly comprises a drive wheel (29) that rotates horizontally and presses against the wall of the rotating ring (14), a first drive motor (24) fixed on the fixed frame (1), and a conversion assembly that can change the power output direction of the first drive motor (24) and change the power transmission distance.

8. The pull rod rotary conveying device according to claim 7, characterized in that: The conversion assembly comprises a right-angle commutator (26) fixed on a lifting ring frame (13), a first universal joint (25) arranged between the right-angle commutator (26) and a motor shaft of a first drive motor (24), and a second universal joint (27) arranged between the right-angle commutator (26) and a central shaft (291) of a drive wheel (29).

9. The pull rod rotary conveying device according to claim 8, characterized in that: The driving wheel (29) rotates and presses against the inner ring wall of the rotating ring (14) through a floating pressing structure. The floating pressing structure includes a floating seat (28) and a pressing cylinder (30) arranged to float horizontally. One end of the floating seat (28) is hinged to the lifting ring frame (13) and the other end of the floating seat (28) is hinged to the piston rod end of the pressing cylinder (30). The cylinder body of the pressing cylinder (30) is hinged to the lifting ring frame (13) and is located at the end of the floating seat (28) away from the hinged end of the lifting ring frame (13).

10. The pull rod rotating conveying device according to claim 9, characterized in that: A guide support structure is provided between the rotating ring (14) and the lifting ring frame (13) to ensure that the rotating ring (14) rotates stably relative to the lifting ring frame (13). The upper end of the rotating ring (14) is vertically folded outward to form a folding ring (15). The guide support structure includes first support rollers (22) that are distributed at intervals around the lifting ring frame (13) and rotate to abut against the lower end surface of the folding ring (15), and second support rollers (23) that are distributed at intervals around the lifting ring frame (13) and rotate to abut against the outer ring wall of the rotating ring (14).

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