A modular die table moving system

Abstract

This invention discloses a combined mold platform moving system, relating to the field of mold platform moving technology. It includes a base frame, of which two frames are provided. A roller mechanism is located beneath each base frame, and two rotating placement frame mechanisms are located between the two base frames. A moving and positioning mechanism is mounted on each base frame, and a moving frame is mounted on each moving frame. Two winding roller mechanisms and a deflection adjustment wheel mechanism are mounted on the moving frame. The winding roller mechanisms are connected to a tie rod mechanism, and a hook is located at the end of each tie rod mechanism. This invention enables the moving and positioning mechanism to move the lifted workpiece onto the rotating placement frame mechanism. The winding roller mechanisms enable the winding, lifting, and releasing / lowering of the tie rod mechanism. The deflection adjustment wheel mechanism allows for adjustment of the tie rod mechanism's state, achieving modular processing of the overall steel reinforcement skeleton of the beam slab. This integrates various processes of the beam slab onto a movable platform, enabling prefabrication in an assembly line manner and improving the efficiency of prefabricated beam slab production and construction.

Description

Technical Field

[0001] This invention relates to the field of mold table movement technology, specifically a combined mold table movement system. Background Technology

[0002] Currently, the prefabrication of railway and highway T-beams and box girders mainly relies on traditional processes such as outdoor operations, concrete fixed platforms, segmented slab assembly and pouring, and ordinary spray curing. This requires a large site area, a lot of manpower, and a long production cycle, making it a typical labor-intensive industry with generally low construction efficiency.

[0003] In the existing technology, workpieces are usually lifted by gantry cranes. However, the existing technology is not convenient for lifting and transferring multiple workpieces at once, so the efficiency of moving the combined mold table is low. Therefore, there is a lot of room for improvement in the existing technology. Summary of the Invention

[0004] This invention provides a combined mold platform moving system, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A combined mold table moving system includes two base frames. A roller mechanism is located beneath each base frame, and two rotating placement frame mechanisms are located between the two base frames. A moving and positioning mechanism is mounted on each base frame, and a moving frame is mounted on each moving frame. Two take-up roller mechanisms and a deflection adjustment wheel mechanism are mounted on each moving frame. The take-up roller mechanisms are connected to a tie rod mechanism, and the end of each tie rod mechanism has a hook. The rotating placement frame mechanisms are used for rotating and placing the workpiece, the moving and positioning mechanisms are used to move and position the moving frame, the take-up roller mechanisms are used to retract and release the tie rod mechanisms, and the deflection adjustment wheel mechanisms are used to adjust the state of the tie rod mechanisms.

[0007] As a preferred embodiment of the present invention, the roller mechanism includes a roller seat shaft rotatably connected to the bottom frame, a roller seat fixedly connected to one end of the roller seat shaft away from the bottom frame, and a roller rotatably connected to the roller.

[0008] As a preferred embodiment of the present invention, the rotating placement rack mechanism includes a deflection shaft rotatably connected to the base frame, two placement plate seats fixedly connected to the deflection shaft, the two placement plate seats being symmetrically arranged on the deflection shaft, a plurality of placement plates fixedly connected to the placement plate seats, a clamping plate mechanism being provided on the placement plates, a first reduction gearbox being provided on the side of the base frame, the output end of the first reduction gearbox being connected to the deflection shaft, a first motor being provided on the first reduction gearbox, and the output shaft of the first motor being connected to the input end of the first reduction gearbox.

[0009] As a preferred embodiment of the present invention, the movable positioning mechanism includes a movable fixed seat fixed on the base frame, a second motor is provided on the side of the movable fixed seat, the output shaft of the second motor is fixedly connected to a first threaded rod, the first threaded rod is rotatably connected to the movable fixed seat, the first threaded rod is threadedly connected to the movable frame, and the movable frame is slidably connected to the base frame.

[0010] As a preferred embodiment of the present invention, the take-up roller mechanism includes a take-up seat fixed on a movable frame, the take-up seat being rotatably connected to a take-up roller shaft, the take-up roller shaft being fixedly connected to a take-up roller, a second reduction gearbox being provided on the movable frame, the output end of the second reduction gearbox being fixedly connected to the take-up roller shaft, a third motor being provided on the second reduction gearbox, and the output shaft of the third motor being connected to the input end of the second reduction gearbox.

[0011] As a preferred embodiment of the present invention, the deflection adjustment wheel mechanism includes a fourth motor fixed to a movable frame. The output shaft of the fourth motor is fixedly connected to a first gear, which meshes with a second gear. The second gear is fixedly connected to a rotating ring, which is rotatably connected to the movable frame. Two clamping rod mechanisms are provided inside the rotating ring, symmetrically arranged within the rotating ring. The clamping rod mechanisms are fixedly connected to a deflection wheel seat, which is rotatably connected to a deflection wheel. The clamping rod mechanism includes a clamping shell fixed inside the rotating ring, a spring inside the clamping shell, a sliding plate fixedly connected to the spring, the sliding plate being located inside the clamping shell and slidably connected to the clamping shell. The sliding plate is fixedly connected to a clamping rod, which passes through the clamping shell and is fixedly connected to the deflection wheel seat.

[0012] As a preferred embodiment of the present invention, the pull rod mechanism includes a plurality of rotating joint mechanisms connected in series. Each rotating joint mechanism includes a rotating joint, which is fixedly connected to a rotating joint seat. The rotating joint has two annular grooves. A rotating retaining plate mechanism is provided between adjacent rotating joint mechanisms. The rotating retaining plate mechanism includes a first rotating ring, which is rotatably connected to two first rotating shafts. The first rotating shafts are rotatably connected to a first rotating plate. The first rotating plate is fixedly connected to a rotating plate seat. The rotating plate seat is rotatably connected to a second rotating plate. The second rotating plate is rotatably connected to a second rotating shaft. The second rotating shaft is rotatably connected to a second rotating ring. Both the first rotating ring and the second rotating ring are located within the annular grooves.

[0013] As a preferred embodiment of the present invention, the pallet mechanism includes a threaded rod rotatably connected to the placement plate, a rotating handle fixedly connected to the threaded rod, a feed seat rotatably connected to the threaded rod, a first pallet rotatably connected to the feed seat, a first pallet rotatably connected to a pallet rotating seat, a second pallet rotatably connected to the pallet rotating seat, a pallet shaft rotatably connected to the second pallet rotatably connected to the second pallet rotatably connected to the pallet shaft, and a pallet shaft fixedly connected to the placement plate.

[0014] The present invention has the following advantages: By setting a rotating placement frame mechanism, the present invention can clamp and position the workpiece after lifting, and at the same time realize the rotation and displacement of the workpiece to increase the number of works placed. The moving displacement mechanism can drive the lifted workpiece onto the rotating placement frame mechanism. The winding roller mechanism can realize the winding, lifting and releasing of the tie rod mechanism. With the deflection adjustment wheel mechanism, the state of the tie rod mechanism can be adjusted, thereby avoiding the tie rod mechanism from shaking during hoisting, ensuring the stability of workpiece lifting and transportation, realizing the block processing of the overall steel reinforcement skeleton of the beam and slab, integrating the various processes of the beam and slab on the mobile platform, realizing the prefabrication of the assembly line operation, and improving the efficiency of prefabricated beam and slab production and construction. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a combined mold platform moving system.

[0016] Figure 2 This is a structural schematic diagram from the second perspective of the combined module moving system.

[0017] Figure 3 This is a structural schematic diagram of the combined module moving system from a third-person perspective.

[0018] Figure 4 for Figure 3 A magnified view of a portion of region A in the middle.

[0019] Figure 5 for Figure 3 A magnified view of a portion of region B in the middle.

[0020] Figure 6 This is a schematic diagram of the tie rod mechanism in the combined mold table moving system.

[0021] Figure 7 This is a sectional view of the clamping rod mechanism in the combined mold table moving system.

[0022] In the diagram: 1. Base frame; 2. Roller mechanism; 201. Roller seat shaft; 202. Roller seat; 203. Roller; 3. Rotating placement frame mechanism; 301. Deflection shaft; 302. Placement plate seat; 303. Placement plate; 304. Clamping plate mechanism; 3041. Threaded rod; 3042. Rotating handle; 3043. Feed seat; 3044. First clamping plate; 3045. Clamping plate rotating seat; 3046. Second clamping plate; 3047. Clamping plate shaft; 305. First reduction gearbox; 306. First motor; 4. Moving and positioning mechanism; 401. Moving fixed seat; 402. Second motor; 403. First threaded rod; 5. Moving frame; 6. Take-up roller mechanism; 601. Take-up seat; 602. Take-up roller shaft; 603. Take-up roller; 604. Second gearbox; 605. Third motor; 7. Deflection adjustment wheel mechanism; 701. Fourth motor; 702. First gear; 703. Second gear; 704. Rotating ring; 705. Pressing rod mechanism; 7051. Pressing shell; 7052. Spring; 7053. Slide plate; 7054. Pressing rod; 706. Deflection wheel seat; 707. Deflection wheel; 8. Pull rod mechanism; 801. Rotating joint mechanism; 802. Rotating joint; 803. Rotating joint seat; 804. Ring groove; 805. Rotating clamping plate mechanism; 806. First rotating ring; 807. First rotating shaft; 808. First rotating plate; 809. Rotating plate seat; 810. Second rotating plate; 811. Second rotating shaft; 812. Second rotating ring; 9. Hook. Detailed Implementation

[0023] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0024] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0025] Example 1, please refer to Figures 1-7A combined mold table moving system includes a base frame 1, of which two base frames 1 are provided. A roller mechanism 2 is provided under the base frame 1, and two rotating placement frame mechanisms 3 are provided between the two base frames 1. A moving displacement mechanism 4 is provided on the base frame 1, and a moving frame 5 is provided on the moving displacement mechanism 4. Two take-up roller mechanisms 6 and a deflection adjustment wheel mechanism 7 are provided on the moving frame 5. The take-up roller mechanism 6 is connected to a tie rod mechanism 8, and a hook 9 is provided at the end of the tie rod mechanism 8. The rotating placement frame mechanism 3 is used for rotating and placing the workpiece, the moving displacement mechanism 4 is used to drive the moving frame 5 to move and change position, the take-up roller mechanism 6 is used to realize the take-up and release of the tie rod mechanism 8, and the deflection adjustment wheel mechanism 7 is used to adjust the state of the tie rod mechanism 8.

[0026] The roller mechanism 2 includes a roller seat shaft 201 that is rotatably connected to the bottom frame 1. One end of the roller seat shaft 201 away from the bottom frame 1 is fixedly connected to a roller seat 202, and the roller seat 202 is rotatably connected to a roller 203.

[0027] The rotating placement frame mechanism 3 includes a deflection shaft 301 rotatably connected to the base frame 1. The deflection shaft 301 is fixedly connected to two placement plate seats 302, which are symmetrically arranged on the deflection shaft 301. Several placement plates 303 are fixedly connected to the placement plate seats 302. A clamping mechanism 304 is provided on each placement plate 303. A first reduction gearbox 305 is provided on the side of the base frame 1. The output end of the first reduction gearbox 305 is connected to the deflection shaft 301. A first motor 306 is provided on the first reduction gearbox 305, and the output shaft of the first motor 306 is connected to the input end of the first reduction gearbox 305. The moving and positioning mechanism 4 includes a movable fixed seat 401 fixed to the base frame 1. A second motor 402 is provided on the side of the movable fixed seat 401. The output shaft of the second motor 402 is fixedly connected to a first threaded rod 403. The first threaded rod 403 is rotatably connected to the movable fixed seat 401. The first threaded rod 403 is threadedly connected to the moving frame 5, and the moving frame 5 is slidably connected to the base frame 1.

[0028] Specifically, turning on the second motor 402 can drive the first threaded rod 403 to rotate. The rotation of the first threaded rod 403 can drive the moving frame 5 to move, thereby moving the workpiece onto the placement plate 303 for placement. If rotational repositioning is required, the first motor 306 is turned on. The rotation of the output shaft of the first motor 306 will drive the first reduction gearbox 305 to rotate, causing the deflection shaft 301 to rotate. The rotation of the deflection shaft 301 will drive the placement plate seat 302 to rotate, thereby driving the placement plate 303 to rotate, thus achieving rotational repositioning.

[0029] The take-up roller mechanism 6 includes a take-up seat 601 fixed on the movable frame 5. The take-up seat 601 is rotatably connected to the take-up roller shaft 602, and the take-up roller shaft 602 is fixedly connected to the take-up roller 603. The movable frame 5 is provided with a second reduction gearbox 604. The output end of the second reduction gearbox 604 is fixedly connected to the take-up roller shaft 602. The second reduction gearbox 604 is provided with a third motor 605. The output shaft of the third motor 605 is connected to the input end of the second reduction gearbox 604. The deflection adjustment wheel mechanism 7 includes a fourth motor 701 fixed on the movable frame 5. The output shaft of the fourth motor 701 is fixedly connected to a first gear 702. The first gear 702 meshes with a second gear 703. The second gear 703 is fixedly connected to a rotating ring 704. The rotating ring 704 is rotatably connected to the movable frame 5. The rotating ring 704 is provided with two clamping rod mechanisms 705. The two clamping rod mechanisms 705 are symmetrically arranged in the rotating ring 704. The clamping rod mechanisms 705 are fixedly connected to a deflection wheel seat 706. 706 is rotatably connected to the deflection wheel 707. The clamping rod mechanism 705 includes a clamping shell 7051 fixed inside the rotating ring 704. A spring 7052 is provided inside the clamping shell 7051. The spring 7052 is fixedly connected to the sliding plate 7053. The sliding plate 7053 is located inside the clamping shell 7051. The sliding plate 7053 and the clamping shell 7051 are slidably connected. The sliding plate 7053 is fixedly connected to the clamping rod 7054. The clamping rod 7054 passes through the clamping shell 7051. The clamping rod 7054 is fixedly connected to the deflection wheel seat 706. The pull rod mechanism 8 includes several rotating joint mechanisms 801 connected in series. Each rotating joint mechanism 801 includes a rotating joint 802, which is fixedly connected to a rotating joint seat 803. The rotating joint 802 is provided with two annular grooves 804. A rotating clamping plate mechanism 805 is provided between adjacent rotating joint mechanisms 801. The rotating clamping plate mechanism 805 includes a first rotating ring 806, which is rotatably connected to two first rotating shafts 807. The first rotating shafts 807 are rotatably connected to a first rotating plate 808, which is fixedly connected to a rotating plate seat 809. The rotating plate seat 809 is rotatably connected to a second rotating plate 810, which is rotatably connected to a second rotating shaft 811. The second rotating shaft 811 is rotatably connected to a second rotating ring 812. Both the first rotating ring 806 and the second rotating ring 812 are located within the annular grooves 804.

[0030] Specifically, to lift the workpiece, the third motor 605 is activated. The output shaft of the third motor 605 rotates, driving the second reduction gearbox 604 to work, which in turn drives the take-up roller shaft 602 to rotate, and then drives the take-up roller 603 to rotate. At this time, the series-connected rotating joint 802 can be driven to rise. Since the state of the tie rod mechanism 8 can be adjusted under the drive of the deflection adjustment wheel mechanism 7, the tie rod mechanism 8 under the deflection adjustment wheel mechanism 7 cannot rotate or deflect. That is, the first rotating ring 806 and the second rotating ring 812 are at the specified angle of the annular groove 804. That is, the rotation centers of the rotating plate seat 809 and the rotating joint seat 803 are not on the same line, which makes the rotating joint 802 not rotate, and the tie rod mechanism 8 rises. When passing the deflection wheel 707, under the action of the spring 7052, the deflection wheel 707 can abut against the surface of the first rotating ring 806 and the second rotating ring 812, activating the fourth motor 701. The rotation of the output shaft of the fourth motor 701 will drive the first gear 702 to rotate, the rotation of the first gear 702 will drive the second gear 703 to rotate, the rotation of the second gear 703 will drive the rotating ring 704 to rotate, and thus drive the deflection wheel 707 to rotate, causing the first rotating ring 806 and the second rotating ring 812 to rotate, so that the first rotating ring 806 and the second rotating ring 812 rotate along the ring groove 804, so that the rotation centers of the rotating plate seat 809 and the rotating joint seat 803 are on the same line. At this time, the rotating joint mechanism 801 can be folded and stored.

[0031] Example 2, see below. Figure 4 In this embodiment of the invention, the pallet mechanism 304 includes a threaded rod 3041 rotatably connected to the placement plate 303, a rotating handle 3042 fixedly connected to the threaded rod 3041, a feed seat 3043 rotatably connected to the threaded rod 3041, a first pallet 3044 rotatably connected to the feed seat 3043, a pallet rotating seat 3045 fixedly connected to the first pallet 3044, a second pallet 3046 rotatably connected to the pallet rotating seat 3045, a pallet shaft 3047 rotatably connected to the second pallet 3046, and a pallet shaft 3047 fixedly connected to the placement plate 303.

[0032] Specifically, after the workpiece is placed on the placement plate 303, the handle 3042 can be rotated. Rotating the handle 3042 will drive the threaded rod 3041 to rotate, and the threaded rod 3041 can drive the feed seat 3043 to feed, thereby folding the first clamping plate 3044 and the second clamping plate 3046. Under the pushing action of the first clamping plate 3044 and the second clamping plate 3046, the workpiece can be clamped and fixed.

[0033] In the implementation of this invention, the device is first moved to a designated position by the roller mechanism 2. At this time, the take-up roller mechanism 6 is activated, which releases the pull rod mechanism 8. When the pull rod mechanism 8 passes the deflection adjustment wheel mechanism 7, the deflection adjustment wheel mechanism 7 is activated simultaneously, which adjusts the state of the pull rod mechanism 8 so that it will not bend or rotate. When the pull rod mechanism 8 descends to a designated height, the workpiece is loaded by the hook 9. At this time, the take-up roller mechanism 6 continues to lift and rewind the pull rod mechanism 8. Simultaneously, the deflection adjustment wheel mechanism 7 is activated to adjust the state of the pull rod mechanism 8, thereby lifting and hoisting the workpiece. If it is necessary to place the lifted workpiece, the moving and positioning mechanism 4 is activated. The moving and positioning mechanism 4 can drive the moving frame 5 to move horizontally, thereby moving the workpiece horizontally. At this time, the lifted workpiece can be placed on the rotating placement frame mechanism 3 to fix the workpiece. The rotating placement frame mechanism 3 can hold multiple workpieces, thereby increasing the efficiency of lifting and transporting.

[0034] This invention, by setting up a rotating placement frame mechanism 3, can clamp and position the workpiece after lifting, and at the same time realize the rotation and displacement of the workpiece to increase the number of works placed. The moving displacement mechanism 4 can drive the lifted workpiece onto the rotating placement frame mechanism 3. The winding roller mechanism 6 can realize the winding, lifting and releasing of the tie rod mechanism 8. With the help of the deflection adjustment wheel mechanism 7, the state of the tie rod mechanism 8 can be adjusted, thereby avoiding the tie rod mechanism 8 from shaking during hoisting, ensuring the stability of workpiece lifting and transportation, realizing the block processing of the overall steel reinforcement skeleton of the beam and slab, integrating the various processes of the beam and slab on the mobile platform, realizing the prefabrication of the assembly line operation, and improving the efficiency of prefabricated beam and slab production and construction.

[0035] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A modular table moving system comprising a base frame, characterized in that, The bottom frame is provided with two, the bottom frame is provided with a rolling mechanism, two bottom frames are provided with two rotating rack mechanisms, the bottom frame is provided with a moving displacement mechanism, the moving displacement mechanism is provided with a moving rack, the moving rack is provided with two winding roller mechanisms and a deflection adjusting wheel mechanism, the winding roller mechanism is connected with a pull rod mechanism, and the end of the pull rod mechanism is provided with a hook; the rotating rack mechanism is used for rotating placement of workpieces, the moving displacement mechanism is used for moving displacement of the moving rack, the winding roller mechanism is used for winding and releasing of the pull rod mechanism, and the deflection adjusting wheel mechanism is used for adjusting the state of the pull rod mechanism; The rotating rack mechanism comprises a deflection shaft which is rotationally connected with the bottom frame, the deflection shaft is fixedly connected with two rack plate bases, the two rack plate bases are symmetrically arranged on the deflection shaft, the rack plate base is fixedly connected with a plurality of rack plates, the rack plate is provided with a clamping plate mechanism, the side of the bottom frame is provided with a first speed reducer, the output end of the first speed reducer is connected with the deflection shaft, the first speed reducer is provided with a first motor, and the output shaft of the first motor is connected with the input end of the first speed reducer; The deflection adjusting wheel mechanism comprises a fourth motor fixed on the moving rack, the output shaft of the fourth motor is fixedly connected with a first gear, the first gear is engaged with a second gear, the second gear is fixedly connected with a rotating ring, the rotating ring is rotationally connected with the moving rack, two pressing rod mechanisms are arranged in the rotating ring, the two pressing rod mechanisms are symmetrically arranged in the rotating ring, the pressing rod mechanism is fixedly connected with a deflection wheel base, the deflection wheel base is rotationally connected with a deflection wheel, and the pressing rod mechanism comprises a pressing shell fixed in the rotating ring, a spring arranged in the pressing shell, a sliding plate fixedly connected with the spring, the sliding plate located in the pressing shell, the sliding plate and the pressing shell in sliding connection, a pressing rod fixedly connected with the sliding plate, and the pressing rod penetrating through the pressing shell and fixedly connected with the deflection wheel base; The pull rod mechanism comprises a plurality of rotating joint mechanisms which are rotationally connected in series, the rotating joint mechanism comprises a rotating joint, the rotating joint is fixedly connected with a rotating joint base, the rotating joint is provided with two ring grooves, and a rotating clamping plate mechanism is arranged between adjacent rotating joint mechanisms, the rotating clamping plate mechanism comprises a first rotating ring, the first rotating ring is rotationally connected with two first rotating shafts, the first rotating shaft is rotationally connected with a first rotating plate, the first rotating plate is fixedly connected with a rotating plate base, the rotating plate base is rotationally connected with a second rotating plate, the second rotating plate is rotationally connected with a second rotating shaft, the second rotating shaft is rotationally connected with a second rotating ring, and the first rotating ring and the second rotating ring are arranged in the ring groove; The clamping plate mechanism comprises a threaded rod which is rotationally connected with the rack plate, the threaded rod is fixedly connected with a rotating handle, the threaded rod is rotationally connected with a feeding base, the feeding base is rotationally connected with a first clamping plate, the first clamping plate is fixedly connected with a clamping plate rotating base, the clamping plate rotating base is rotationally connected with a second clamping plate, the second clamping plate is rotationally connected with a clamping plate shaft, and the clamping plate shaft is fixedly connected with the rack plate.

2. The modular stage movement system of claim 1, wherein, The rolling mechanism comprises a roller base shaft which is rotationally connected with the bottom frame, the roller base shaft is fixedly connected with a roller base at the end away from the bottom frame, and the roller base is rotationally connected with a roller.

3. The modular stage movement system of claim 1, wherein, The mobile displacement mechanism comprises a mobile fixing base fixed to the bottom frame, the side of the mobile fixing base is provided with a second motor, the output shaft of the second motor is fixedly connected with a first threaded rod, the first threaded rod is rotationally connected with the mobile fixing base, the first threaded rod is threadedly connected with a mobile frame, and the mobile frame is slidingly connected with the bottom frame.

4. The modular stage movement system of claim 1, wherein, The winding roller mechanism comprises a winding seat fixed to the mobile frame, the winding seat is rotationally connected with a winding roller shaft, the winding roller shaft is fixedly connected with a winding roller, the mobile frame is provided with a second speed reducer, the output end of the second speed reducer is fixedly connected with the winding roller shaft, the second speed reducer is provided with a third motor, and the output shaft of the third motor is connected with the input end of the second speed reducer.

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