CN215100418U

CN215100418U - Rotary telescopic conveying mechanism

Info

Publication number: CN215100418U
Application number: CN202121293016.8U
Authority: CN
Inventors: 向孟群; 王博; 曹文选
Original assignee: Suzhou Saimo Measurement And Control Technology Co ltd
Current assignee: Suzhou Saimo Measurement And Control Technology Co ltd
Priority date: 2021-06-09
Filing date: 2021-06-09
Publication date: 2021-12-10
Anticipated expiration: 2031-06-09

Abstract

The utility model discloses a rotary telescopic conveying mechanism, which aims at the problem of low conveying efficiency of the existing conveying mechanism and comprises a base arranged between adjacent conveying work stations; the rotary table component is rotatably connected to the base and used for changing the conveying direction of the product; the conveying assembly is connected with the rotary table assembly and is used for driving the product to move along the conveying direction; the telescopic assembly is connected to the conveying assembly, a group of telescopic assemblies are arranged at two ends of the conveying direction of the conveying assembly respectively and used for adjusting the conveying distance of the conveying assembly, so that the conveying assembly extends to an adjacent conveying work station when a product is conveyed and retracts when the rotary table assembly rotates. The whole mechanism can realize the taking-out action of the sorted products only by rotating on the production line, and has small occupied area and ground resource saving compared with a mode of moving out of the production line. In addition, whole mechanism rotates on producing the line and can accomplish the letter sorting action, and transmission distance is short, and it is short to consume time, sorts efficiently.

Description

Rotary telescopic conveying mechanism

Technical Field

The utility model relates to a conveying equipment field, more specifically say, it relates to a rotatory conveying mechanism that stretches out and draws back.

Background

A conveyor, a mechanical device that transports goods in a continuous manner along a certain route from a starting point to a destination, is mainly used to transport articles. The product on the production line has yields and defective products, needs set up the equipment of letter sorting defective products on the production line for take out the defective products from the production line to other mechanisms outside the transfer to production line.

At present, a sorting and conveying device exists in the market, refer to fig. 1, including a first conveying station 1 and a second conveying station 2 for conveying a product to be tested along a production line, a guide rail 4 is arranged between the first conveying station 1 and the second conveying station 2, the setting direction of the guide rail 4 is perpendicular to the conveying direction of the production line, a third conveying station 3 is arranged on the guide rail 4 in a sliding manner, when the product 5 needs to be conveyed from the first conveying station 1 to the second conveying station 2, the third conveying station 3 is arranged on the same production line with the first conveying station 1 and the second conveying station 2, and the product 5 sequentially conveys from the first conveying station 1 to the third conveying station 3 to the second conveying station 2. Referring to fig. 2, when the product 5 needs to be transported from the production line to the third conveying station 3, the third conveying station 3 is driven by the guide rail 4 to slide out of the production line, so as to sort the product 5. Although the sorting conveying equipment can realize the sorting of the products 5, the sorting conveying equipment needs to continuously move back and forth between the outside of the production line and the inside of the production line, so that the time consumption is high, the conveying efficiency is low, in addition, the space outside the production line is occupied when the sorting conveying equipment moves to the outside of the production line, and the ground resources are increased. There is room for improvement.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a rotatory conveying mechanism that stretches out and draws back has the advantage that improves letter sorting conveying efficiency.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a rotary telescopic conveying mechanism comprises

The base is arranged between the adjacent conveying work stations;

the rotary table component is rotatably connected to the base and used for changing the conveying direction of the product;

the conveying assembly is connected with the rotary table assembly and is used for driving the products to move along the conveying direction;

the telescopic assembly is connected with the conveying assembly, a group of telescopic assemblies are arranged at two ends of the conveying direction of the conveying assembly respectively and used for adjusting the conveying length of the conveying assembly, so that the conveying assembly extends to the adjacent conveying work stations when products are conveyed and is retracted when the rotary table assembly rotates.

By adopting the technical scheme, the base is positioned between the adjacent conveying work stations and is contacted with the adjacent work stations, so that the conveying between the work stations is stable. The rotary table component rotates on the base, the conveying direction of the products is changed, different products are distinguished, and sorting action of the products is achieved. The conveying assembly arranged on the rotary table assembly moves the product from the previous work station to the work station and then to the next work station, and the product is translated. When the telescopic assemblies at the two ends of the conveying direction of the conveying assembly extend, the conveying assembly of the work station is in seamless connection with the conveying assembly of the adjacent work station, the conveying assembly is helped to smoothly transfer a product of the previous work station to the work station and then to the next work station, and the product is smoothly conveyed among different work stations and cannot be clamped among different work stations; when the two telescopic assemblies are shortened, a gap is reserved between the conveying assembly of the work station and the conveying assembly of the adjacent work station, when the rotary table assembly drives the transmission assembly to rotate, the work station and the adjacent work station do not interfere, and barrier-free rotation of the rotary table assembly is achieved.

Further, the turntable assembly comprises a rotating bottom plate rotatably connected to the base and a rotating power source connected to the base for driving the rotating bottom plate to rotate.

By adopting the technical scheme, the rotary power source on the base provides a power source for the rotary bottom plate, the rotary bottom plate is rotated on the base, the rotation of the rotary table component is realized, and the change of the product conveying direction is realized.

Further, the conveying assembly comprises a fixed side plate connected to the rotary bottom plate, the fixed side plate is rotatably connected with a belt wheel set, a conveying belt is connected between the belt wheel set, and the fixed side plate is further provided with a conveying power source for driving the belt wheel set to rotate.

Adopt above-mentioned technical scheme, the transmission power source on the fixed curb plate provides power for band pulley group, drives the rotation of band pulley group, and the band pulley group drive moves with the conveyer belt of band pulley meshing, and the conveyer belt turns into the slew velocity and the power of band pulley group into the speed and the power of conveyer belt translation, and the product on the conveyer belt follows the conveyer belt translation under the effect of frictional force, realizes that the product from a work station to another work station removal.

Furthermore, flexible subassembly includes sliding connection in the support frame of fixed curb plate along direction of delivery one end, the support frame rotates and is connected with the follow driving wheel that struts the conveyer belt and form the conveying face and toward withdrawing the take-up pulley of the taut conveyer belt of direction, fixed curb plate sets up the flexible power supply that drives the support frame and come and go the action along direction of delivery.

By adopting the technical scheme, the telescopic power source on the fixed side plate provides power for the extension and the shortening of the support frame. When the telescopic power source pushes the support frame to extend, the driven wheel and the tension wheel move towards the direction close to the adjacent work station along with the support frame, the driven wheel props open the conveying belt, the conveying surface of the conveying belt is extended to the adjacent work station, and smooth conveying of products is achieved; when flexible power supply pulling support frame withdrawed, follow the support frame and remove to the direction of keeping away from adjacent work station from driving wheel and take-up pulley, the take-up pulley withdraws the conveyer belt, makes the conveying face of conveyer belt shorten, at this moment, leaves the clearance between support frame and the adjacent work station, supplies revolving stage mechanism rotation, takes place to interfere between revolving stage mechanism and the adjacent work station when preventing to rotate.

Furthermore, the conveying assemblies are arranged on the rotating bottom plate in two groups in parallel, a transmission shaft is arranged between the two groups of conveying assemblies, and two ends of the transmission shaft respectively drive the conveying assemblies to be linked together.

By adopting the technical scheme, the transmission shaft between the two groups of conveying assemblies rotates to drive the two groups of transmission assemblies to move synchronously, so that products are conveyed on the two groups of conveying assemblies which are parallel to each other safely and stably.

Furthermore, one group of the conveying assemblies is connected with the rotating bottom plate in a sliding mode along the direction perpendicular to the conveying direction, the other group of the conveying assemblies is fixedly connected with the rotating bottom plate along the direction perpendicular to the conveying direction, and the rotating bottom plate is provided with a width adjusting assembly for adjusting the distance between the two groups of the conveying assemblies.

By adopting the technical scheme, the group of conveying assemblies slides on the rotating base plate, so that the relative movement between the two groups of conveying assemblies along the direction perpendicular to the conveying direction is realized, the width adjusting assembly realizes the adjustment and fixation of the distance between the two groups of conveying assemblies, the two groups of conveying assemblies can convey products with different sizes, and the adaptability of the whole mechanism is improved.

Furthermore, the width adjusting assembly comprises a ball screw which is rotatably connected between the two groups of conveying assemblies, a width adjusting power source which is fixed at one end of the ball screw and drives the ball screw to rotate, a screw nut which is rotatably connected with the ball screw and drives the conveying assemblies to translate, and a screw locking assembly which is connected with the ball screw and locks the distance between the two groups of conveying assemblies.

Adopt above-mentioned technical scheme, screw-nut and ball screw meshing, transfer wide power supply drive ball screw and rotate, screw-nut removes and drives slidable conveying assembly and slides along perpendicular to direction of delivery, realizes the regulation of distance between two sets of conveying assemblies. The screw locking assembly prevents the ball screw from rotating, and the distance between the two groups of conveying belts is fixed.

Further, the base is fixedly provided with an inductor for detecting the rotation angle of the turntable assembly.

By adopting the technical scheme, when the turntable mechanism rotates to a proper angle, the sensor fixed on the base is triggered to stop the rotation of the rotating platform, so that the rotation and the stop of the turntable mechanism are automatically controlled.

To sum up, the utility model discloses following beneficial effect has:

1. the whole mechanism can realize the taking-out action of the sorted products only by rotating on the production line, and compared with a mode of moving out of the production line, the mechanism has small occupied area and saves ground resources;

2. compared with a sorting mode that the mechanism integrally moves to the outside of the production line, the whole mechanism can complete sorting actions by rotating on the production line, the transmission distance is short, the time consumption is short, and the sorting efficiency is high;

3. when the telescopic assembly on the conveying assembly extends, seamless transmission with an adjacent work station is achieved, the phenomenon that products are clamped or even fall from the conveying assembly is avoided, when the telescopic assembly is shortened, a gap is reserved between the conveying assembly and the adjacent work station, and the turntable assembly is made to rotate smoothly for the stepping down of the turntable assembly.

Drawings

FIG. 1 is a schematic diagram of a conveying status of a sorting and conveying apparatus in the background art;

FIG. 2 is a schematic diagram of a sorting status of a sorting conveyor in the background art;

FIG. 3 is a schematic structural view of a rotary telescopic conveying mechanism;

FIG. 4 is a schematic view of the structure of the turntable assembly, the transfer assembly and the telescoping assembly on the fixed side plate of a rotary telescopic conveyor;

FIG. 5 is an exploded view of a width adjusting knob and a lead screw locking assembly of a rotary telescopic conveying mechanism;

FIG. 6 is a partially enlarged schematic view of a guide rail and a slide block of a rotary telescopic conveying mechanism;

fig. 7 is a schematic structural view of a shaft sleeve, a screw nut and a ball screw of a rotary telescopic conveying mechanism.

In the figure: 1. a first conveyance station; 2. a second conveyance station; 3. a third conveyance station; 4. a guide rail; 5. producing a product; 6. a base; 7. a turntable assembly; 71. rotating the base plate; 72. rotating the stepper motor; 8. a transfer assembly; 81. fixing the side plate; 82. a pulley block; 821. a motor driving wheel; 822. a motor driven wheel; 823. a transmission driving wheel; 824. a first drive tensioner; 825. a first transmission driven wheel; 826. a second drive tensioner; 827. a second driven transmission wheel; 83. a conveyor belt; 84. a pulley motor; 85. a motor conveyor belt; 9. a telescoping assembly; 91. a support frame; 92. a first telescopic end driven wheel; 93. a first telescopic end idler wheel; 94. a second telescopic end driven wheel; 95. a second telescopic end idler wheel; 96. an electric cylinder; 10. a drive shaft; 11. a width adjusting component; 111. a ball screw; 112. a width adjusting knob; 113. a feed screw nut; 114. the screw rod locking assembly; 1141. a screw clamping block; 1142. locking the handle; 12. adjusting the width of the side plate; 13. a guide rail; 14. a slider; 15. a light sensor; 16. and a shaft sleeve.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and embodiments.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

A rotary telescopic conveying mechanism, see fig. 3, comprises a rectangular base 6 located between adjacent stations, a turntable assembly 7 located above the base 6, a conveying assembly 8 located on the turntable assembly 7, and telescopic assemblies 9 located at both ends of the conveying assembly 8 in the conveying direction. Base 6 is supported by turntable assembly 7, and conveyor assembly 8 is supported by turntable assembly 7, and retraction assembly 9 is supported by conveyor assembly 8.

Referring to fig. 3 and 4, the turntable assembly 7 includes a rotary power source and a rectangular rotary bottom plate 71, the rotary power source is a rotary stepping motor 72, the rotary stepping motor 72 is bolted to the middle of the base 6, and an output shaft of the rotary stepping motor 72 is bolted to the middle of the rotary bottom plate 71, so that the rotary stepping motor 72 drives the rotary bottom plate 71 to rotate.

Referring to fig. 3 and 4, the conveying assembly 8 includes a stationary side plate 81, a conveying power source, a pulley set 82, and a conveyor belt 83. A fixed side plate 81 is bolted to one side of the rectangular rotating base plate 71 parallel to the conveying direction, and the longitudinal direction of the fixed side plate 81 is parallel to the conveying direction. The transmission power source adopts a belt wheel motor 84, and the belt wheel motor 84 is fixed in the middle of the fixed side plate 81.

Referring to fig. 3 and 4, the pulley set 82 includes a motor driving pulley 821, a motor driven pulley 822, a transmission driving pulley 823, a first transmission driven pulley 825, a first transmission tension pulley 824, a second transmission driven pulley 827, and a second transmission tension pulley 826, all of which are connected to the fixed side plate 81 in a bearing manner.

Referring to fig. 3 and 4, an output shaft of the pulley motor 84 is fixedly connected with the motor driving wheel 821, a motor transmission belt 85 is engaged with a wheel surface of the motor driving wheel 821, the motor transmission belt 85 is engaged with the motor driven wheel 822, the motor driven wheel 822 tensions the motor transmission belt 85, the pulley motor 84 drives the motor transmission belt 85 to rotate, and the motor transmission belt 85 transmits the force and the speed of the motor driving wheel 821 to the motor driven wheel 822.

Referring to fig. 3 and 4, the telescopic assembly 9 includes a support frame 91, a first telescopic end driven wheel 92, a first telescopic end idler wheel 93, and a telescopic power source. The flexible power supply adopts electric cylinder 96, and electric cylinder 96 fixes at the top of the input of fixed curb plate 81, and electric cylinder 96's telescopic link and support frame 91 fixed connection, support frame 91 are at the top of fixed curb plate 81 along the reciprocating sliding of direction of delivery. The side of the support frame 91 close to the rotary stepping motor 72 is connected with a first telescopic end driven wheel 92 by an input end bearing, and the side of the support frame 91 close to the rotary stepping motor 72 is connected with a first telescopic end idle wheel 93 by an input end bearing.

Referring to fig. 3 and 4, the motor driven wheel 822 is fixedly connected with a transmission driving wheel 823, the transmission driving wheel 823 is in bearing connection with the middle of the fixed side plate 81, the side face of the fixed side plate 81, close to the input end, is in bearing connection with a first transmission driven wheel 825, a first transmission tension wheel 824 is arranged between the first transmission driven wheel 825 and the transmission driving wheel 823, and the first transmission tension wheel 824 tensions the transmission belt 83 between the first transmission driven wheel 825 and the transmission driving wheel 823.

Referring to fig. 4, correspondingly, at the output end of the fixed side plate 81, the pulley block 82 and the telescopic assembly 9 are mirrored to the output end of the fixed side plate 81 with a plane perpendicular to the conveying direction passing through the rotation axis of the driving pulley 823 as a mirror image plane.

Referring to fig. 4, a second transmission tension wheel 826 and a second transmission driven wheel 827 are sequentially and axially connected to the fixed side plate 81 from the middle portion to the output end. The support frame 91 near the output end is sequentially connected with a second telescopic end idle wheel 95 and a second telescopic end driven wheel 94 in a bearing mode along the conveying direction.

Referring to fig. 4, the conveyor belt 83 passes around a driving wheel 823, a first driving tension wheel 824, a first driving driven wheel 825, a first telescopic end idle wheel 93, a first telescopic end driven wheel 92, a second telescopic end driven wheel 94, a second telescopic end idle wheel 95, a second driving driven wheel 827, a second driving tension wheel 826, and finally is wound around the driving wheel 823. The clockwise rotation direction of the transmission driving wheel 823 is used for positive rotation, the transmission driving wheel 823 sequentially drives the first transmission tensioning wheel 824 to rotate reversely, the first transmission driven wheel 825 rotates positively, the first telescopic end idle wheel 93 rotates reversely, the first telescopic end is driven by the wheel 92 to rotate positively, the second telescopic end is driven by the wheel 94 to rotate positively, the second telescopic end idle wheel 95 rotates reversely, the second transmission driven wheel 827 rotates positively, and the second transmission tensioning wheel 826 rotates reversely.

Referring to fig. 3, 4 and 7, a width-adjusting side plate 12 parallel to the fixed side plate 81 is provided on a side of the rotating base plate 71 away from the fixed side plate 81. Accordingly, the transfer unit 8 and the telescopic unit 9 are mirrored on the width-adjusting side plate 12 with the central plane between the width-adjusting side plate 12 and the fixed side plate 81 as a mirror image plane. The belt wheel motor 84 of the fixed side plate 81 is fixedly connected with a transmission shaft 10 through a coupler, the other end of the transmission shaft 10 is connected with a shaft sleeve 16 in a sliding mode, the shaft sleeve 16 is connected to the width adjusting side plate 12 in a bearing mode, the axis of the transmission shaft 10 is perpendicular to the width adjusting side plate 12 and the fixed side plate 81, and the width adjusting side plate 12 can move towards the direction close to or far away from the fixed side plate 81 on the transmission shaft 10. One end of the transmission shaft 10 close to the width adjusting side plate 12 is fixedly connected with a transmission driving wheel 823 of the width adjusting side plate 12, and the conveying assembly 8 and the telescopic assembly 9 of the fixed side plate 81 are linked with the conveying assembly 8 and the telescopic assembly 9 of the width adjusting side plate 12 together, so that the conveying surfaces on the two conveying assemblies 8 synchronously convey products.

Referring to fig. 3, 4, 6 and 7, two guide rails 13 which are parallel and equal in length are fixed on the upper surface of the rotating bottom plate 71 through bolts, the length direction of the guide rails 13 is perpendicular to the conveying direction, a sliding block 14 slides on the guide rails 13, and the sliding block 14 is fixed at the bottom of the width-adjusting side plate 12, so that the width-adjusting side plate 12 slides on the rotating bottom plate 71 in a reciprocating manner perpendicular to the conveying direction. The fixed side plate 81 is bearing-connected with one end of the ball screw 111, the other end of the ball screw 111 is engaged with the screw nut 113, the screw nut 113 is fixed on the width-adjusting side plate 12, and the length direction of the ball screw 111 is parallel to the length direction of the guide rail 13. The ball screw 111 rotates, the external thread of the ball screw 111 is engaged with the internal thread of the screw nut 113, and the screw nut 113 drives the width-adjusting side plate 12 to slide on the guide rail 13.

Referring to fig. 5 and 7, one end of the fixed side plate 81 of the ball screw 111 is fixedly connected with a width adjusting power source, the width adjusting power source adopts a manually rotatable width adjusting knob 112, the fixed side plate 81 is bolted to the screw clamping block 1141, the screw clamping block 1141 is provided with a through hole for the ball screw 111 to pass through, and the circumferential surface of the through hole is provided with a through groove arranged along the axial direction of the through hole. The screw clamping block 1141 is provided with a dead lock handle 1142 penetrating through the through groove along a direction perpendicular to the groove surface of the through groove. When the conveying width does not need to be adjusted, the locking handle 1142 is screwed, the external thread of the locking handle 1142 is screwed with the internal thread of the clamping block, so that the opening of the through groove of the screw rod clamping block 1141 is reduced, the through hole clamps the ball screw 111, the friction force between the ball screw 111 and the screw rod clamping block 1141 is increased, the ball screw 111 cannot rotate, and the width-adjusting side plate 12 is fixed. When the conveying width needs to be adjusted, the locking handle 1142 is reversely screwed, the external thread of the locking handle 1142 is screwed with the internal thread of the screw clamping block 1141, the through groove opening of the screw clamping block 1141 is enlarged, the through hole is loosened by the ball screw 111, and the friction force between the ball screw 111 and the screw clamping block 1141 is reduced to enable the ball screw 111 to rotate so as to adjust the conveying width.

Referring to fig. 3, the top surface of the base 6 is fixedly connected with a sensor, the sensor is a light sensor 15, the light sensor 15 is located at the bottom of the conveying assembly 8, when the conveying assembly 8 rotates to above the light sensor 15, the input end of the conveying assembly 8 touches the light pillar of the light sensor, and the light sensor 15 is triggered to stop the rotation of the conveying assembly 8.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a rotatory flexible conveying mechanism which characterized in that: comprises that

The base (6) is arranged between the adjacent conveying work stations;

the rotary table component (7) is rotatably connected to the base (6) and is used for changing the conveying direction of the products (5);

the conveying assembly (8) is connected to the rotary table assembly (7) and is used for driving the products (5) to move along the conveying direction;

the telescopic assembly (9) is connected to the conveying assembly (8), a group of telescopic assemblies is arranged at two ends of the conveying direction of the conveying assembly (8) respectively and used for adjusting the conveying distance of the conveying assembly (8), so that the conveying assembly (8) extends to an adjacent conveying work station when products (5) are conveyed and retracts when the rotary table assembly (7) rotates.

2. A rotary telescopic conveyor according to claim 1, characterized in that: the turntable assembly (7) comprises a rotary bottom plate (71) which is rotatably connected to the base (6) and a rotary power source which is connected to the base (6) and used for driving the rotary bottom plate (71) to rotate.

3. A rotary telescopic conveyor according to claim 1, characterized in that: conveying subassembly (8) are including connecting in fixed curb plate (81) of rotating bottom plate (71), fixed curb plate (81) are rotated and are connected with band pulley group (82), be connected with conveyer belt (83) between band pulley group (82), fixed curb plate (81) still set up driving band pulley group (82) pivoted conveying power source.

4. A rotary telescopic conveyor according to claim 3, characterized in that: the telescopic assembly (9) comprises a supporting frame (91) which is connected to one end of the fixed side plate (81) in a sliding mode along the conveying direction, the supporting frame (91) is connected with a driven wheel which stretches the conveying belt (83) to form a conveying surface and a tensioning wheel which tensions the conveying belt (83) in the retracting direction in a rotating mode, and the fixed side plate (81) is provided with a telescopic power source which drives the supporting frame (91) to move back and forth along the conveying direction.

5. A rotary telescopic conveyor according to claim 2, characterized in that: the conveying assemblies (8) are arranged in two groups in parallel on the rotating bottom plate (71), a transmission shaft (10) is arranged between the two groups of conveying assemblies (8), and the two ends of the transmission shaft (10) respectively drive the conveying assemblies (8) to be linked together.

6. A rotary telescopic conveyor according to claim 5, characterized in that: one group of the conveying assemblies (8) is connected with the rotating bottom plate (71) in a sliding mode along the direction perpendicular to the conveying direction, the other group of the conveying assemblies (8) is fixedly connected with the rotating bottom plate (71) along the direction perpendicular to the conveying direction, and the rotating bottom plate (71) is provided with a width adjusting assembly (11) for adjusting the distance between the two groups of the conveying assemblies (8).

7. A rotary telescopic conveyor according to claim 6, characterized in that: the width adjusting assembly (11) comprises a ball screw (111) rotatably connected between the two groups of conveying assemblies (8), a width adjusting power source fixed at one end of the ball screw (111) and used for driving the ball screw (111) to rotate, a screw nut (113) rotatably connected to the ball screw (111) and used for driving the conveying assemblies (8) to translate, and a screw locking assembly (114) connected to the ball screw (111) and used for locking the distance between the two groups of conveying assemblies (8).

8. A rotary telescopic conveyor according to claim 1, characterized in that: and the base (6) is fixedly provided with a sensor for detecting the rotation angle of the turntable assembly (7).