Stacking device for sealing rubber rings

Abstract

The application relates to the technical field of sealing rubber ring production, in particular to a sealing rubber ring stacking device, which comprises a conveying mechanism arranged above a bottom plate, a mechanical arm mechanism for picking up sealing rubber rings and a transfer mechanism, the transfer mechanism comprises a transfer box body arranged above a base for transferring the sealing rubber rings, a sealing rubber ring alignment assembly is arranged on the bottom wall of the transfer box body, the sealing rubber ring alignment assembly comprises a plurality of equidistant circular through grooves arranged on the bottom wall of the transfer box body, the bottom wall of the transfer box body is fixedly installed with a support cylinder corresponding to the circular through grooves, and the inner cavity of the support cylinder is relatively slidably connected with at least four cylindrical clamping pieces extending into the inner cavity of the transfer box body; the four cylindrical clamping pieces are close to each other to facilitate the stacking work, the four cylindrical clamping pieces are far away from each other to simultaneously clamp the inner walls of the multiple sealing rubber rings, and mutual collision between the adjacent sealing rubber rings is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sealing rubber ring production, in particular to a sealing rubber ring stacking device. BACKGROUND

[0002] In the actual production process of the sealing rubber ring, a large number of rubber rings can be produced at the same time in the process of one-time die casting of a device. Too many rubber rings placed in disorder may affect the aesthetics and tidiness of the factory workshop, and therefore a stacking device needs to be used for sorting and arranging the rubber rings.

[0003] In the prior art, a utility model patent with the publication (announcement) number CN212890426U and the name of a sealing ring based transportation device is disclosed, which comprises a storage box and a hanging rod. The left and right sides of the inner surface of the storage box are both fixedly connected with clamping assemblies. The left and right ends of the hanging rod are both fixedly connected with connecting blocks. The inside of the connecting block is provided with a first telescopic groove. The first telescopic groove is provided with a first spring. One end of the first spring is fixedly connected with a clamping block. The sealing ring is strung on the hanging rod through the sealing ring based transportation device. The hanging rod is fixed through the connecting block and the clamping assembly. The sealing ring will not scatter everywhere during transportation, is uniformly distributed, is very convenient to take and use, and reduces the volume. The storage box can also store more sealing rings. The bottom of the storage box is provided with a roller, and the other side is provided with a handle, which facilitates the transportation of the sealing pad by the staff, does not need manual carrying, saves time and effort.

[0004] The device of the patent makes the sealing ring not scatter everywhere during transportation by stringing the sealing ring on the hanging rod, and the sealing ring is uniformly distributed. However, the device of the patent still has the following technical defects in use: (1) Since the device of the patent does not limit the sealing ring strung on the hanging rod, the adjacent sealing rings are prone to collide with each other, which may easily damage the sealing ring; (2) The device of the patent needs to be manually disassembled, the sealing ring is strung on the hanging rod, and the hanging rod is finally assembled to complete the stacking of the sealing ring, which is relatively complicated in overall operation steps and is not convenient for the use of the staff. SUMMARY

[0005] The present application provides a sealing rubber ring stacking device.

[0006] The technical problems solved by the present application are: (1) The existing device is not convenient for limiting the plurality of sealing rings stacked, which may easily cause the adjacent sealing rings to collide with each other, and may easily damage the sealing ring; (2) The existing device is not convenient for quickly stacking the sealing ring.

[0007] The application can be realized by the following technical scheme: a stacking device for sealing rubber rings, comprising a conveying mechanism arranged above a base plate, a mechanical arm mechanism for picking up sealing rubber rings and a transfer mechanism, the transfer mechanism comprising a transfer box arranged above the base plate for transferring sealing rubber rings, a bottom wall of the transfer box being provided with a sealing rubber ring alignment assembly, the sealing rubber ring alignment assembly comprising a plurality of circular through grooves equidistantly arranged in the bottom wall of the transfer box, the bottom wall of the transfer box being fixedly provided with a support cylinder corresponding to each of the circular through grooves, the inner cavity of the support cylinder being relatively slidably connected with at least four cylindrical clamping pieces extending into the inner cavity of the transfer box;

[0008] The inner cavity of the support cylinder is provided with a driving piece for relatively moving the four cylindrical clamping pieces.

[0009] Further technical improvements of the application are that the driving piece comprises a circular table vertically slidably connected to the inner cavity of the support cylinder, the inner cavity of the support cylinder is slidably connected with at least four inclined plates abutting against the inclined surface of the circular table, and the inclined plates are fixedly connected with the cylindrical clamping pieces.

[0010] Further technical improvements of the application are that the side of the inclined plate close to the inner cavity of the support cylinder is provided with an inner groove, and the inner groove of the inclined plate is fixedly provided with an extrusion spring fixedly connected with the inner cavity of the support cylinder.

[0011] Further technical improvements of the application are that the transfer box comprises a movable frame fixedly connected thereto, the inner cavity of the movable frame is fixedly provided with a gas cylinder, the output end of the gas cylinder is fixedly provided with a lifting frame, the bottom end of the inner cavity of the lifting frame is fixedly provided with a second electric telescopic rod, the output end of the second electric telescopic rod is fixedly provided with a moving plate, the moving plate is fixedly connected with the plurality of circular tables, and the plurality of circular tables are synchronously moved by driving the second electric telescopic rod.

[0012] Further technical improvements of the application are that the transfer box further comprises an opening and closing door rotatably connected to one side thereof, the opening and closing door is arranged on one side of the transfer box to facilitate subsequent discharging of the sealing rubber rings, thereby facilitating the use requirements of the workers.

[0013] Further technical improvements of the application are that the conveying mechanism comprises a conveying belt support fixedly connected with the base plate, the inner cavity of the conveying belt support is provided with a transmission belt, two eight-shaped correction plates are symmetrically fixedly arranged on both sides of the inner cavity of the conveying belt support and above the transmission belt, the sealing rubber rings are positionally guided by the correction plates, the sealing rubber rings are better picked up by the mechanical arm mechanism through the guidance, thereby facilitating the stacking work.

[0014] Further technical improvements of the present application are that the mechanical arm mechanism comprises a mounting seat fixed with the bottom plate, a first mechanical arm is arranged on the mounting seat, a second mechanical arm is hingedly connected to the top of the first mechanical arm, a third mechanical arm is hingedly connected to the top of the second mechanical arm, a fixing seat is rotatably connected to the bottom of the third mechanical arm, and a sealing rubber ring clamping assembly is arranged at the bottom of the fixing seat. The mechanical arm mechanism facilitates the sealing rubber ring transfer work of the staff.

[0015] Further technical improvements of the present application are that the sealing rubber ring clamping assembly comprises a connecting seat fixed with the fixing seat, a supporting plate is fixedly installed on the bottom of the connecting seat through a connecting spring, a fixed cylinder is fixedly installed on the bottom of the supporting plate, at least three L-shaped sliding plates are equidistantly and slidably connected to the bottom of the fixed cylinder, a limiting clamp plate abutting against the inner wall of the sealing rubber ring is fixedly installed on the bottom of the L-shaped sliding plate, and the sealing rubber ring clamping assembly facilitates clamping the sealing rubber ring, and further facilitates subsequent transfer of the sealing rubber ring to the inner cavity of the transfer box.

[0016] Further technical improvements of the present application are that one side of the conveying belt support is provided with a limiting assembly for limiting the movement of the transfer box, the limiting assembly comprises two limiting plates fixed on the bottom plate and fixed with one side of the conveying belt support, the transfer box is located between the two limiting plates, a first electric telescopic rod is fixedly installed on the top of each limiting plate, a rotating seat is fixedly installed on the output end of the first electric telescopic rod, a fixed clamp plate for limiting the transfer box is rotatably connected to the outer peripheral wall of the rotating seat, the limiting assembly facilitates good limiting of the transfer box, and the limiting facilitates subsequent stacking work of the staff.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] 1. The four cylindrical clamping pieces are close to each other, the mechanical arm mechanism is used to stack multiple sealing rubber rings on one side of the four cylindrical clamping pieces, the four cylindrical clamping pieces are away from each other to simultaneously clamp the inner walls of the multiple sealing rubber rings, the inner walls are limited to avoid mutual collision between adjacent sealing rubber rings, thereby facilitating subsequent transportation of the sealing rubber rings by the transfer box, and further facilitating the use requirements of the staff.

[0019] 2. The transmission belt runs to facilitate the conveying of the sealing rubber ring, the mechanical arm mechanism and the sealing rubber ring clamping assembly arranged at the bottom thereof facilitate the transfer of the sealing rubber ring to the inner cavity of the transfer box, and the semi-mechanical operation instead of manual operation is beneficial to simplify the operation steps of the whole equipment, thereby facilitating the use of the staff. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to facilitate the understanding of those skilled in the art, the present application will be further described below with reference to the drawings.

[0021] Figure 1 It is the overall structure schematic diagram of the present application;

[0022] Figure 2 It is the structure connection schematic diagram of the sealing rubber ring clamping assembly of the present application;

[0023] Figure 3 It is the bottom structure connection schematic diagram of the fixed cylinder of the present application;

[0024] Figure 4 It is the top structure connection schematic diagram of the fixed cylinder of the present application;

[0025] Figure 5 It is the partial structure schematic diagram of the present application;

[0026] Figure 6 It is the partial structure schematic diagram of the present application Figure 5 It is the partial structure schematic diagram of the present application

[0027] Figure 7 It is the three-dimensional structure connection schematic diagram of the transfer box of the present application;

[0028] Figure 8 It is the side structure connection schematic diagram of the transfer box of the present application;

[0029] Figure 9 It is the three-dimensional structure connection schematic diagram of the support cylinder of the present application;

[0030] Figure 10 It is the internal structure connection schematic diagram of the support cylinder of the present application.

[0031] In the figure:

[0032] 1, bottom plate;

[0033] 2, mechanical arm mechanism; 21, mounting seat; 22, first mechanical arm; 23, second mechanical arm; 24, third mechanical arm;

[0034] 3, sealing rubber ring clamping assembly; 31, connecting seat; 32, support plate; 33, fixed cylinder; 331, rotating shaft; 332, rotating disc; 333, linkage plate; 334, fixed column; 335, arc-shaped sliding groove; 336, gear; 337, electric push rod; 338, rack; 34, L-shaped sliding plate; 35, limiting clamp plate;

[0035] 4, conveying mechanism; 41, conveying belt support; 42, transmission belt; 43, connecting frame; 44, height limiting plate; 45, correcting plate;

[0036] 5, transfer box; 51, moving frame; 52, mounting plate; 53, air cylinder; 54, lifting frame; 55, second electric telescopic rod; 56, moving plate; 57, transmission rod; 571, circular table; 572, inclined plate; 573, extrusion spring; 574, cylindrical clamping piece; 58, supporting cylinder; 59, circular through groove; 510, opening and closing door;

[0037] 6, positioning mechanism; 61, limiting plate; 62, first electric telescopic rod; 63, rotating seat; 64, fixed clamping plate. DETAILED DESCRIPTION

[0038] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined object, the specific embodiments, structures, features and effects according to the present application are described in detail below in combination with the drawings and preferred embodiments.

[0039] Please refer to Figure 1 As shown in the figure, a kind of sealing rubber ring stacking device, including bottom plate 1, bottom plate 1 is provided with conveying mechanism 4, mechanical arm mechanism 2, transfer mechanism 5 and positioning mechanism 6, conveying mechanism 4 is used for the feeding of sealing rubber ring, mechanical arm mechanism 2 is used to transfer sealing rubber ring to transfer mechanism 5 at specified position.

[0040] Please refer to Figure 1 As shown in the figure, mechanical arm mechanism 2 includes fixed mounting seat 21 with bottom plate 1, mounting seat 21 is provided with first mechanical arm 22, the top of first mechanical arm 22 is hingedly connected with second mechanical arm 23, the top of second mechanical arm 23 is hingedly connected with third mechanical arm 24, the bottom of third mechanical arm 24 is rotatably connected with fixed seat, and the bottom of fixed seat is provided with sealing rubber ring clamping assembly 3.

[0041] Please refer to Figures 1-2 As shown in the figure, sealing rubber ring clamping assembly 3 includes fixed connecting seat 31 with fixed seat, connecting spring is fixedly installed on the bottom of connecting seat 31 and is provided with supporting plate 32, supporting plate 32 is fixedly installed on the bottom and is provided with fixed cylinder 33, at least three L-shaped sliding plates 34 are equidistantly and slidably connected to the bottom of fixed cylinder 33, three L-shaped sliding plates 34 are equidistantly and annularly arranged at the bottom of fixed cylinder 33, and L-shaped sliding plate 34 is fixedly installed on the bottom and is provided with limiting clamping plate 35 abutting against the inner wall of sealing rubber ring.

[0042] Please refer to Figures 2-4As shown, the inner cavity of the fixed cylinder 33 is provided with a driving member for relative movement of the three L-shaped sliding plates 34, the driving member comprises a rotating shaft 331 rotatably connected to the inner cavity of the fixed cylinder 33, the outer peripheral wall of the rotating shaft 331 is fixedly sleeved with a rotating disc 332, the inner cavity of the fixed cylinder 33 is slidably connected with at least three linkage plates 333, the linkage plates 333 are fixedly installed with fixed columns 334, the inner cavity of the rotating disc 332 is provided with an arc-shaped sliding groove 335 for sliding of the fixed columns 334, one side of the linkage plates 333 away from the fixed columns 334 is fixedly connected with the L-shaped sliding plates 34, the outer peripheral wall of the rotating shaft 331 and below the rotating disc 332 is fixedly sleeved with a gear 336, the inner cavity of the fixed cylinder 33 is slidably connected with a rack 338 engaged with the gear 336, the inner cavity of the fixed cylinder 33 is fixedly installed with an electric push rod 337 for sliding of the driving rack 338.

[0043] Please refer to Figure 5 As shown, the conveying mechanism 4 comprises a conveyor belt support 41 fixedly connected to the bottom plate 1, the inner cavity of the conveyor belt support 41 is provided with a transmission belt 42 for conveying the sealing rubber ring, the conveyor belt support 41 is provided with a sealing rubber ring position correcting assembly, the sealing rubber ring position correcting assembly comprises a connecting frame 43 fixedly connected to the top of the conveyor belt support 41, two inner side walls of the connecting frame 43 are fixedly installed with a height limiting plate 44, two sides of the bottom of the height limiting plate 44 are fixedly installed with a correcting plate 45, one side of the correcting plate 45 close to the conveying sealing rubber ring is fixedly installed with a flexible pad;

[0044] One side of the conveyor belt support 41 is fixedly installed with a servo motor for driving the transmission belt 42 to run.

[0045] Please refer to Figures 5-6 As shown, the positioning mechanism 6 comprises two limiting plates 61 fixedly connected to the bottom plate 1 and one side of the conveyor belt support 41, the two limiting plates 61 are symmetrically arranged, the transfer mechanism 5 comprises a transfer box 5, the transfer box 5 is located between the two limiting plates 61, the top of each of the two limiting plates 61 is fixedly installed with a first electric telescopic rod 62, the output end of the first electric telescopic rod 62 is fixedly installed with a rotating seat 63, the outer peripheral wall of the rotating seat 63 is rotatably connected with a fixed clamp plate 64 for limiting the transfer box 5;

[0046] Please refer to Figures 7-10As shown, the transfer box 5 comprises a movable frame 51 fixedly connected thereto, an installation plate 52 is fixedly installed in the inner cavity of the movable frame 51, a gas cylinder 53 is fixedly installed at the middle end of the bottom of the installation plate 52, an output end of the gas cylinder 53 is fixedly installed with a lifting frame 54 which is vertically and slidingly connected with the inner cavity of the movable frame 51, a second electric telescopic rod 55 is fixedly installed at the bottom end of the inner cavity of the lifting frame 54, an output end of the second electric telescopic rod 55 is fixedly installed with a moving plate 56 which is vertically and slidingly connected with the inner cavity of the lifting frame 54, a plurality of support cylinders 58 are fixedly installed between the transfer box 5 and the lifting frame 54, a circular table 571 is vertically and slidingly connected in the inner cavity of the support cylinder 58, the bottom of the circular table 571 is fixedly connected with the moving plate 56 through a transmission rod 57, at least four inclined plates 572 which are in abutment with the inclined surface of the circular table 571 are slidingly connected in the inner cavity of the support cylinder 58, an inner recess is formed in the side of the inclined plate 572 close to the inner cavity of the support cylinder 58, an extrusion spring 573 which is fixedly connected with the inner cavity of the support cylinder 58 is fixedly installed in the inner recess of the inclined plate 572, a cylindrical clamping piece 574 which is in one-to-one correspondence with the inclined plate 572 is fixedly installed at the top of the inclined plate 572, a circular through slot 59 which is consistent in number with the support cylinders 58 is formed through the bottom wall of the transfer box 5, and the circular through slot 59 provides space for the movement of the four cylindrical clamping pieces 574.

[0047] A sealing plug is fixedly installed on one side of the opening and closing door 510, and a sealing slot which is matched with the sealing plug is formed in the inner cavity of the transfer box 5.

[0048] In use, the transfer box 5 is first moved onto the bottom plate 1, then the fixed clamping plates 64 on the two rotating seats 63 are rotated in opposite directions to enable the transfer box 5 to enter between the two limiting plates 61, and after the transfer box 5 enters the working position, the two fixed clamping plates 64 are rotated to reset, and the two first electric telescopic rods 62 are driven, so that the two fixed clamping plates 64 are in abutment with the outer wall of the transfer box 5 through the shortening of the first electric telescopic rods 62, thereby facilitating the limiting of the transfer box 5.

[0049] The transport box 5 is limited to make the transmission belt 42 run, and then the sealed rubber ring to be stacked is placed on the transmission belt 42. The correction plate 45 fixed on both sides of the inner cavity of the conveying belt support 41 facilitates the position correction of the sealed rubber ring entering the transmission belt 42. The position correction facilitates the picking up of the mechanical arm mechanism 2. When the sealed rubber ring is transported to the lower side of the mechanical arm mechanism 2 by the transmission belt 42, the transmission belt 42 stops running. The first mechanical arm 22, the second mechanical arm 23 and the third mechanical arm 24 are controlled to make the limiting clamp plate 35 at the bottom of the fixed cylinder 33 enter the inner cavity of the sealed rubber ring. The operation of the electric push rod 337 makes the rack 338 slide. The rack 338 rotates the gear 336 through meshing. The rotation of the gear 336 drives the rotating disc 332 to rotate. The cooperation of the arc-shaped sliding groove 335 in the inner cavity of the rotating disc 332 and the fixed column 334 on the linkage plate 333 makes the three limiting clamp plates 35 move relatively, thereby facilitating the clamping of the sealed rubber ring. After the sealed rubber ring is clamped, the first mechanical arm 22, the second mechanical arm 23 and the third mechanical arm 24 are controlled to make the sealed rubber ring reach the corresponding position in the corresponding transport box 5. The limiting of the sealed rubber ring is released by driving the electric push rod 337 again, so that it can fall into the outer wall of the four cylindrical clamping pieces 574. Such a reciprocating cycle can realize the stacking work of multiple sealed rubber rings. The stacking work is stopped until the outer wall of the cylindrical clamping piece 574 is completely sleeved with the sealed rubber ring. Similarly, multiple groups of cylindrical clamping pieces 574 are arranged in the transport box 5. Since the number of each group of cylindrical clamping pieces 574 is four, after the stacking work of one group of cylindrical clamping pieces 574 is completed, the stacking work of another group of cylindrical clamping pieces 574 can be carried out by the mechanical arm mechanism 2 until the stacking work is completed.

[0050] After the sealed rubber ring is stacked, the second electric telescopic rod 55 is driven to limit the stacked sealed rubber ring. The extension of the second electric telescopic rod 55 makes the moving plate 56 move upward. The movement of the moving plate 56 facilitates the synchronous upward movement of the corresponding circular table 571 in the inner cavity of the multiple supporting cylinders 58. The movement of the circular table 571 makes the four inclined plates 572 slide away from the inclined surface of the circular table 571. The sliding of the four inclined plates 572 makes the corresponding cylindrical clamping pieces 574 move synchronously, thereby facilitating the movement of the four cylindrical clamping pieces 574 to limit the inner wall of the multiple sealed rubber rings. Limiting the inner wall avoids mutual collision between adjacent sealed rubber rings, thereby facilitating subsequent transportation by the transport box 5. The limitation of the transport box 5 is released before transportation.

[0051] When the sealing rubber ring needs to be discharged after the transport box 5 is transported to the working position, the opening and closing door 510 can be opened first, and then the cylinder 53 is driven. The shortening of the cylinder 53 can make the lifting frame 54 move downward, the downward movement of the lifting frame 54 can make the cylindrical clamping piece 574 limiting the sealing rubber ring move downward synchronously, the downward movement of the cylindrical clamping piece 574 can facilitate the release of the sealing rubber ring, and then facilitate the discharge of the sealing rubber ring.

[0052] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application still belong to the scope of the technical solution of the present application.

Claims

1. A stacking device for sealing rubber rings, comprising a conveying mechanism (4) disposed on a base plate (1), a robotic arm mechanism (2) for picking up sealing rubber rings, and a transfer mechanism, characterized in that: The transfer mechanism includes a transfer box (5) for transferring sealing rubber rings, which is disposed on the base plate (1). The bottom wall of the transfer box (5) is provided with a sealing rubber ring alignment component. The sealing rubber ring alignment component includes a plurality of circular through slots (59) that are equidistantly opened through the bottom wall of the transfer box (5). The bottom wall of the transfer box (5) is fixedly installed with a support cylinder (58) that corresponds one-to-one with the circular through slots (59). The inner cavity of the support cylinder (58) is slidably connected with at least four cylindrical clamping members (574) that extend into the inner cavity of the transfer box (5). The inner cavity of the supporting cylinder (58) is provided with a driving member that causes the four cylindrical clamping members (574) to move relative to each other; The driving component includes a frustum (571) that is vertically slidably connected to the inner cavity of the supporting cylinder (58). The inner cavity of the supporting cylinder (58) is slidably connected to at least four inclined plates (572) that abut against the inclined surface of the frustum (571). The inclined plates (572) are fixedly connected to the cylindrical clamping component (574). The inclined plate (572) has an inner groove on the side near the inner cavity of the supporting cylinder (58), and a compression spring (573) fixedly connected to the inner cavity of the supporting cylinder (58) is fixedly installed in the inner groove of the inclined plate (572). The transfer box (5) includes a mobile frame (51) fixed thereto. A cylinder (53) is fixedly installed in the inner cavity of the mobile frame (51). A lifting frame (54) is fixedly installed at the output end of the cylinder (53). A second electric telescopic rod (55) is fixedly installed at the bottom end of the inner cavity of the lifting frame (54). A moving plate (56) is fixedly installed at the output end of the second electric telescopic rod (55). The moving plate (56) is fixedly connected to multiple truncated cones (571). The transfer box (5) also includes an opening and closing door (510) rotatably connected to one side thereof. The conveying mechanism (4) includes a conveyor belt bracket (41) fixed to the base plate (1). The inner cavity of the conveyor belt bracket (41) is provided with a transmission belt (42). Two figure-eight shaped straightening plates (45) are symmetrically fixed on both sides of the inner cavity of the conveyor belt bracket (41) and above the transmission belt (42). The robotic arm mechanism (2) includes a mounting base (21) fixed to the base plate (1), a first robotic arm (22) is provided on the mounting base (21), a second robotic arm (23) is hinged to the top of the first robotic arm (22), a third robotic arm (24) is hinged to the top of the second robotic arm (23), a fixed base is rotatably connected to the bottom of the third robotic arm (24), and a sealing rubber ring clamping assembly (3) is provided at the bottom of the fixed base. The sealing rubber ring clamping assembly (3) includes a connecting seat (31) fixed to a fixed seat. A support plate (32) is fixedly installed at the bottom of the connecting seat (31) by a connecting spring. A fixed cylinder (33) is fixedly installed at the bottom of the support plate (32). At least three L-shaped sliding plates (34) are equidistantly slidably connected at the bottom of the fixed cylinder (33). A limiting clamp (35) that abuts against the inner wall of the sealing rubber ring is fixedly installed at the bottom of the L-shaped sliding plate (34). A limiting component is provided on one side of the conveyor belt support (41) to restrict the movement of the transfer box (5). The limiting component includes two limiting plates (61) fixed on the base plate (1) and fixed to one side of the conveyor belt support (41). The transfer box (5) is located between the two limiting plates (61). A first electric telescopic rod (62) is fixedly installed on the top of each of the two limiting plates (61). A rotating seat (63) is fixedly installed at the output end of the first electric telescopic rod (62). A fixing clamp (64) for limiting the movement of the transfer box (5) is rotatably connected to the outer peripheral wall of the rotating seat (63).

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