A push-pull shuttle composite conveyor for construction machinery

Abstract

The present application relates to a kind of engineering machinery push-pull shuttle composite conveyor, the interval arrangement of longitudinal track group and multiple first transverse track groups, the longitudinal sliding of cooperation shuttle frame and the butt joint function of second transverse track group, can realize the free switching of workpiece between longitudinal main track and multiple transverse branch tracks, satisfy the multi-directional conveying demand of different stations in spraying line, without manual intervention can complete the automatic transfer of workpiece between pretreatment, spraying, drying and other processes;The modular design of longitudinal track group and multiple first transverse track groups, can be flexibly adjusted layout according to workshop space, compared with traditional independent track system, reduce more than 30% of space occupation, especially suitable for compact spraying production line;The integrated design of shuttle frame and push-pull mechanism integrates longitudinal conveying and transverse transfer function in single device, avoid the structural redundancy caused by multiple equipment superposition, optimize production line space utilization.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of spraying conveying line, in particular to an engineering machinery push-pull transfer composite conveyor. BACKGROUND

[0002] In the application scenario of the spraying conveying line, efficient transmission and positioning of the workpiece are the key links to ensure the spraying quality and production efficiency. The traditional spraying conveying system usually adopts a single-direction conveying track (such as a longitudinal or transverse track), or realizes the transfer of the workpiece between different tracks through simple mechanical devices. However, such systems have the following obvious deficiencies: 1. The single-track layout is difficult to meet the multi-directional transfer requirements of the workpiece between different stations (such as pretreatment, spraying, drying, etc.) in a complex production line, and often requires manual intervention or additional transfer equipment, resulting in low production efficiency; 2. In order to realize multi-directional conveying, the traditional system often needs to arrange a large number of independent tracks, occupying a large amount of workshop space, especially in compact production lines, which is difficult to adapt; 3. The driving process of the workpiece between different tracks relies on a single power device (such as a roller, a chain), and lacks an integrated push-pull mechanism, making it difficult to control automation and difficult to interface with an intelligent spraying line. SUMMARY

[0003] The present application aims to at least solve one of the problems existing in the prior art to some extent, and for this purpose, the present application provides a conveying device capable of realizing efficient switching of the workpiece between longitudinal and transverse tracks and having a compact structure.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0005] An engineering machinery push-pull transfer composite conveyor includes a longitudinal track group, a plurality of first transverse track groups are arranged on one side of the longitudinal track group in a longitudinal direction, a transfer carriage is slidably arranged on the longitudinal track group, a first chain conveyor is arranged to drive the transfer carriage to slide along the longitudinal track group, a second transverse track group and a push-pull mechanism are arranged on the transfer carriage, the second transverse track group is capable of being connected with the first transverse track group, and a carrying vehicle for carrying the workpiece is further included, and the push-pull mechanism is used to drive the carrying vehicle to move and convey on the first transverse track group and the second transverse track group.

[0006] In some embodiments, the carrying vehicle includes a rectangular frame, support feet with rollers are arranged at the lower ends of the four corners of the rectangular frame, and a plurality of support plates are arranged in the rectangular frame.

[0007] In some embodiments, the push-pull mechanism comprises a base shell provided on the transfer trolley frame, a push-pull guide shaft sliding transversely on one side of the base shell, a movable hook assembly provided on both ends of the push-pull guide shaft and matched with the carrier vehicle, a second chain conveyor provided in the base shell, a chain support base provided on the chain of the second chain conveyor, a first gear rotatably installed on the chain support base, and a first rack fixedly provided in the base shell and capable of engaging with the first gear.

[0008] In some embodiments, the movable hook assembly comprises a movable hook base provided on the push-pull guide shaft, a support seat provided on the movable hook base, a first air cylinder provided on the support seat, a hook member and a driving member respectively hingedly connected to the support seat, one end of the hook member and the driving member being hingedly connected through an intermediate rod, the other end of the piston rod of the first air cylinder being hingedly connected to the support seat, the piston rod of the first air cylinder being hingedly connected to the other end of the driving member, and the hook member being capable of being flipped upward to abut against the rectangular frame or being flipped downward to be separated from the rectangular frame.

[0009] In some embodiments, V-shaped guide roller sets are provided on the base shell on both sides of the push-pull guide shaft and spaced apart vertically.

[0010] In some embodiments, support plates are provided in the base shell on both sides of the chain of the second chain conveyor, and support wheels are provided on both sides of the chain support base and roll on the support plates.

[0011] In some embodiments, an upper end of the chain support base is provided with a support shaft, the first gear is rotatably sleeved on the support shaft, a support sliding plate is provided on an upper end of the support shaft, a sliding rail is provided on an inner side upper wall of the base shell, a sliding block is slidably provided on the sliding rail, and the sliding block is fixedly provided on the support sliding plate.

[0012] In some embodiments, a locking mechanism capable of locking the carrier vehicle is further provided on the base shell, wherein the locking mechanism comprises mounting plates spaced apart on the outer side of the base shell, locking rods are rotatably provided on each mounting plate, the two locking rods can be simultaneously flipped upward to lock and position the carrier vehicle, a second gear is provided on a rotating shaft of the locking rod, third racks capable of engaging with the second gear are transversely slidably provided on the mounting plates, connecting rods are hingedly connected to inner ends of the two third racks, a second air cylinder is provided on the outer side of the base shell and between the two mounting plates, a piston rod of the second air cylinder is upwardly provided and connected with a hinged seat, and one end of each connecting rod is hingedly connected to the hinged seat.

[0013] In some embodiments, a transmission mechanism is further arranged on the base shell, and when the locking mechanism locks the carrier vehicle, the support slide plate can be locked through the transmission mechanism.

[0014] In some embodiments, the transmission mechanism comprises a movable stop plug arranged outside the base shell, an L-shaped baffle arranged outside the base shell and above the stop plug, a locking hole arranged on one side of the support slide plate for the stop plug to be inserted, an extension plate arranged on the outer end of the stop plug and above, a guide slope arranged on the lower side of the extension plate, a spring arranged between the inner side of the extension plate and the base shell, the L-shaped baffle is used to limit the outward movement of the extension plate, and a driving top rod is arranged on the upper end of the hinge seat, and the upper end of the driving top rod can be pushed on the guide slope.

[0015] 1. The longitudinal rail group and the plurality of first transverse rail groups are arranged at intervals, which cooperate with the longitudinal sliding of the transfer trolley frame and the docking function of the second transverse rail group, so that the free switching of the workpiece between the longitudinal main rail and the plurality of transverse branch rails can be realized, the multi-directional conveying demand of different stations in the spraying line can be met, and the automatic transfer of the workpiece between the pretreatment, spraying, drying and other processes can be completed without manual intervention.

[0016] 2. The modular design of the longitudinal rail group and the plurality of first transverse rail groups can flexibly adjust the layout according to the workshop space, and compared with the traditional independent rail system, the space occupation is reduced by more than 30%, and it is especially suitable for compact spraying production lines.

[0017] 3. The integrated design of the transfer trolley frame and the push-pull mechanism integrates the longitudinal conveying and transverse transfer functions in a single device, avoids the structural redundancy caused by the superposition of multiple devices, and optimizes the space utilization rate of the production line.

[0018] 4. The parallel working mode of the plurality of first transverse rail groups (such as when the transfer trolley frame moves longitudinally, the other first transverse rail groups can work synchronously), which reduces the waiting time of the production line and realizes the continuous operation of the spraying process. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure schematic view of the push-pull transfer trolley composite conveyor of the present application.

[0020] Figure 2 It is a structure schematic view of the push-pull transfer trolley composite conveyor of the present application.

[0021] Figure 3 It is a structure schematic view of the carrier vehicle of the present application.

[0022] Figure 4 It is a structure schematic view of the longitudinal rail group of the present application.

[0023] Figure 5 This is one of the structural schematic diagrams of the push-pull mechanism of the present invention.

[0024] Figure 6 This is the second schematic diagram of the push-pull mechanism of the present invention.

[0025] Figure 7 This is the third schematic diagram of the push-pull mechanism of the present invention.

[0026] Figure 8 For the present invention Figure 5 Enlarged diagram of point A.

[0027] Figure 9 For the present invention Figure 6 Enlarged diagram of point B.

[0028] Figure 10 This is a schematic diagram of the transmission mechanism of the present invention. Detailed Implementation

[0029] The following detailed description provides various embodiments or examples for carrying out the present invention. Of course, these are merely embodiments or examples and are not intended to be limiting. Additionally, repeated reference numerals, such as repeated numbers and / or letters, may be used in different embodiments. These repetitions are for the purpose of simple and clear description of the invention and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0030] like Figures 1-10 The illustrated engineering machinery push-pull shuttle combined conveyor includes a longitudinal track group 1, a plurality of first transverse track groups 2 arranged at intervals along the longitudinal direction on one side of the longitudinal track group 1, a shuttle frame 3 sliding on the longitudinal track group 1, and a first chain conveyor 4 driving the shuttle frame 3 to slide along the longitudinal track group 1. A second transverse track group 5 and a push-pull mechanism are arranged on the shuttle frame 3. The second transverse track group 5 can be connected with the first transverse track group 2. It also includes a transport vehicle 10 for carrying workpieces. The push-pull mechanism is used to drive the transport vehicle 10 to move and transport on the first transverse track group 2 and the second transverse track group 5.

[0031] According to the above structure, the longitudinal track group 1 and the multiple first transverse track groups 2 are arranged at intervals. With the longitudinal sliding of the shuttle frame 3 and the docking function of the second transverse track group 5, the workpiece can be freely switched between the longitudinal main track and multiple transverse branch tracks, which can meet the multi-directional conveying needs of different stations in the spraying line. The workpiece can be automatically transferred between pretreatment, spraying, drying and other processes without manual intervention.

[0032] The modular design of the longitudinal track group 1 and the plurality of first transverse track groups 2 can flexibly adjust the layout according to the workshop space, and can reduce the space occupation by more than 30% compared with the traditional independent track system, and is especially suitable for compact spraying production lines.

[0033] The integrated design of the transfer trolley frame 3 and the push-pull mechanism integrates the longitudinal conveying and transverse transfer functions in a single device, avoids structural redundancy caused by multiple devices, and optimizes the space utilization rate of the production line.

[0034] The parallel working mode of the plurality of first transverse track groups 2 (such as when the transfer trolley frame 3 moves longitudinally, the other first transverse track groups 2 can work synchronously), reduces the waiting time of the production line, and realizes continuous operation of the spraying process.

[0035] Referring to Figure 2 As shown in the figure, one of the embodiments of the present application is provided with two longitudinal track groups 1 and two groups of a plurality of first transverse track groups 2, wherein two first transverse track groups 2 are arranged at intervals, one of the first transverse track groups 2 in the front side is provided with a paint spraying room 11, and the other first transverse track group 2 is a workpiece loading and unloading area 12; and one of the first transverse track groups 2 in the rear side is provided with a first drying oven 13, and the other first transverse track group 2 is provided with a second drying oven 14. That is to say, the front side longitudinal track group 1 can quickly and accurately convey the carrying trolley 10 in the loading and unloading area 12 to the paint spraying room 11 through the push-pull mechanism, avoiding the time loss of manual transfer; then, the carrying trolley 10 after spraying is pulled out by the push-pull mechanism of the rear side longitudinal track group 1, and the carrying trolley 10 is conveyed into the first drying oven 13 or the second drying oven 14 through the push-pull mechanism, so that the drying path can be selected according to the process requirements of the workpiece, and the workpiece after drying can be directly returned to the loading and unloading area 12, forming a closed loop process of "loading and unloading → spraying → drying → loading and unloading", which greatly shortens the production cycle.

[0036] Through the above-mentioned layout of the structure, the paint spraying room 11 and the loading and unloading area 12 are arranged at intervals in the front side first transverse track group 2, and the two drying ovens 13 and 14 are arranged at intervals in the rear side first transverse track group 2, forming a compact "left and right parallel + front and rear series" layout, which can save more than 30% of the workshop space compared with the traditional dispersed layout; and the parallel double drying oven design can simultaneously process workpieces with different process requirements, avoiding the production bottleneck of a single drying oven, and further improving the space utilization rate.

[0037] Referring to Figure 3As shown, the carrier 10 comprises a rectangular frame 21, a supporting leg 22 with a roller is arranged at each of the four corners of the lower end of the rectangular frame 21, and a plurality of supporting plates 23 are spaced apart in the rectangular frame 21; the rectangular frame 21 is made of metal material by welding, the supporting leg 22 is vertically welded at each of the four corners of the lower end of the frame, the roller is installed at the bottom of the supporting leg 22, and the plurality of supporting plates 23 are spaced apart and welded inside the rectangular frame 21 according to actual needs, the supporting plates 23 can be flat plates or plates with anti-skid lines, and are used for placing workpieces.

[0038] As shown in Figure 4 , Figure 5 , Figure 7 , Figure 8 As shown, the push-pull mechanism comprises a base shell 31 arranged on the transfer trolley frame 3, a push-pull guide shaft 32 is transversely slid on one side of the base shell 31, a movable hook assembly matched with the carrier 10 is arranged at both ends of the push-pull guide shaft 32, a second chain conveyor 33 is arranged in the base shell 31, a chain support base plate 34 is arranged on the chain of the second chain conveyor 33, a first gear 35 is rotatably installed on the chain support base plate 34, a first rack 36 capable of meshing with the first gear 35 is fixedly arranged in the base shell 31, and a second rack 37 capable of meshing with the first gear 35 is fixedly arranged on one side of the push-pull guide shaft 32.

[0039] When the push-pull mechanism works, the second chain conveyor 33 drives the chain to move, the chain support base plate 34 drives the first gear 35 to move, the first gear 35 meshes with the first rack 36 and the second rack 37, and the push-pull guide shaft 32 is driven to slide transversely under the action of the second rack 37 since the second rack 36 is fixed, the movable hook assembly is installed at both ends of the push-pull guide shaft 32 and is used for connecting with the carrier 10, and the carrier 10 is realized to be pushed and pulled to convey between the transverse track groups.

[0040] As shown in Figure 8 The movable hook assembly comprises a movable hook base plate 41 arranged on the push-pull guide shaft 32, a supporting seat 42 is arranged on the movable hook base plate 41, a first air cylinder 43 is arranged on the supporting seat 42, a hook piece 44 and a driving piece 45 are respectively hinged on the supporting seat 42, one end of the hook piece 44 and the driving piece 45 is hinged through an intermediate rod 46, the end of the first air cylinder 43 away from the piston rod is hinged on the supporting seat 42, the piston rod of the first air cylinder 43 is hinged with the other end of the driving piece 45, the hook piece 44 can be flipped up to abut against the rectangular frame 21 or flipped down to be separated from the rectangular frame 21.

[0041] When the first cylinder 43 piston rod moves, the driving member 45 is pushed to rotate, the hook member 44 is driven to turn up by the intermediate rod 46, and is abutted against the rectangular frame 21 of the carrier 10, so that the carrier 10 can be pulled or pushed to move; when the first cylinder 43 piston rod moves reversely, the hook member 44 turns down and is separated from the rectangular frame 21, thereby realizing connection and separation with the carrier 10.

[0042] Referring to Figure 7 As shown in the drawings, V-shaped guide roller sets 51 are arranged on the base shell 31 at intervals in the up-down direction on one side of the push-pull guide shaft 32, and the push-pull guide shaft 32 is arranged between the two V-shaped guide roller sets 51; each V-shaped guide roller set 51 is composed of a plurality of V-shaped rollers, and the V-shaped grooves are in contact with the outer surface of the push-pull guide shaft 32; during installation, the V-shaped grooves of the V-shaped guide roller sets 51 are ensured to be parallel to the movement direction of the push-pull guide shaft 32, so that the push-pull guide shaft 32 is located between the two V-shaped guide roller sets 51, and is always guided and supported by the roller sets during sliding.

[0043] Thus, the V-shaped guide roller sets 51 play a guiding and supporting role for the push-pull guide shaft 32, limit the deviation of the push-pull guide shaft 32 during lateral sliding, ensure the smooth operation of the push-pull guide shaft 32 along a straight line, and improve the movement precision and stability of the push-pull mechanism; at the same time, the roller sets can reduce the friction between the push-pull guide shaft 32 and the base shell 31, reduce wear, and prolong the service life of the equipment.

[0044] Referring to Figure 7 As shown in the drawings, support plates 61 are arranged in the base shell 31 and on both sides of the chain of the second chain conveyor 33, and support wheels 62 are arranged on both sides of the chain support base plate 34, and the support wheels 62 roll on the support plates 61.

[0045] The support plates 61 can be made of steel plates and have smooth surfaces; the support wheels 62 are installed on both sides of the chain support base plate 34 and are connected to the chain support base plate 34 through bearings, so that the support wheels 62 can roll freely; after installation, the support wheels 62 are in contact with the support plates 61, and during the operation of the second chain conveyor 33, the support wheels 62 roll on the support plates 61 to assist in supporting the chain support base plate 34 and the chain.

[0046] Thus, through the arrangement of the support plates 61 and the support wheels 62, the chain of the second chain conveyor 33 and the chain support base plate 34 are provided with auxiliary support, share the load during the operation of the chain, reduce the sagging and shaking of the chain, and ensure the smooth operation of the chain; at the same time, the rolling of the support wheels 62 on the support plates 61 can reduce the friction resistance between the chain support base plate 34 and the support plates 61, improve the transmission efficiency, and reduce energy loss.

[0047] Further, the upper end of the chain support base 34 is provided with a support rotating shaft 71, the first gear 35 is rotatably sleeved on the support rotating shaft 71, a support sliding plate 72 is arranged at the upper end of the support rotating shaft 71, a sliding rail 73 is arranged on the inner upper wall of the base shell 31, a sliding block 74 is slidably arranged on the sliding rail 73, and the sliding block 74 is fixedly arranged on the support sliding plate 72.

[0048] The support rotating shaft 71 is vertically fixed at the center of the upper end of the chain support base 34, the first gear 35 is rotatably sleeved on the support rotating shaft 71 through a bearing, the support sliding plate 72 is fixedly arranged at the upper end of the support rotating shaft 71, the sliding rail 73 is arranged on the inner upper wall of the base shell 31, the sliding block 74 is fixedly arranged on the support sliding plate 72, and the sliding block 74 is slidably arranged on the sliding rail 73; when the chain support base 34 moves under the driving of the second chain conveyor 33, the support sliding plate 72 slides on the sliding rail 73 through the sliding block 74, so that the chain support base 34 moves stably.

[0049] Thus, the support rotating shaft 71 provides rotation support for the first gear 35, so that the stability of the rotation of the first gear 35 is ensured; the cooperation of the support sliding plate 72, the sliding rail 73 and the sliding block 74 limits the vertical displacement of the chain support base 34, so that the chain support base 34 moves more stably in the horizontal direction, the meshing of the gear and the rack is avoided due to shaking, the transmission accuracy and reliability are improved, and the wear of the first gear 35 and the chain support base 34 during movement is reduced.

[0050] Referring to FIGS. 1-9, Figure 6 , Figure 9 , Figure 10 As shown in FIGS. 1-9, the base shell 31 is further provided with a locking mechanism capable of locking the carrier 10, wherein the locking mechanism comprises mounting plates 81 arranged at intervals on the outer side of the base shell 31, locking rods 82 rotatably arranged on each mounting plate 81, two locking rods 82 capable of being simultaneously upwardly flipped to limit and lock the carrier 10, second gears 83 arranged on the rotating shafts of the locking rods 82, third racks 84 slidably arranged on the mounting plates 81 and capable of meshing with the second gears 83, connecting rods 87 hingedly connected to the inner ends of the two third racks 84, and a second air cylinder 85 arranged on the outer side of the base shell 31 and between the two mounting plates 81, wherein the piston rod of the second air cylinder 85 is upwardly arranged and connected with a hinged seat 86, and one end of each connecting rod 87 is hingedly connected to the hinged seat 86.

[0051] When the locking mechanism works, the second cylinder 85 pushes the hinged seat 86 to move upward, and the third rack 84 is driven to move laterally through the connecting rod 87, and the second gear 83 is driven to rotate by the third rack 84, so that the two locking rods 82 are simultaneously flipped upward to limit and lock the carrier 10, and the support plate 23 on the carrier 10 is particularly limited.

[0052] Therefore, the locking mechanism drives the third rack 84 and the second gear 83 through the second cylinder 85 to realize the synchronous flipping of the two locking rods 82, limit and lock the carrier 10, prevent the carrier 10 from moving due to external force during the conveying process, and ensure the position stability of the workpiece during the transfer process; the structure of the mechanism is simple, the operation is convenient, the locking and unlocking of the carrier can be quickly realized, and the production efficiency is improved.

[0053] Further, the transmission mechanism is further provided on the base shell 31, and the support slide plate 72 is simultaneously locked by the transmission mechanism when the locking mechanism locks the carrier 10; the transmission mechanism realizes the linkage locking of the locking mechanism and the support slide plate 72, and the support slide plate 72 is simultaneously locked when the locking mechanism locks the carrier 10, so that the displacement of the chain support base plate 34 and the first gear 35 during the workpiece transfer process is prevented, the pushing and pulling mechanism is locked, and the stability and reliability of the entire conveying system are further improved.

[0054] Specifically, the transmission mechanism comprises a stop plug 100 movably penetrating the outer side of the base shell 31, an L-shaped baffle 101 is arranged on the outer side of the base shell 31 and located on the upper side of the stop plug 100, a locking hole 102 for inserting the stop plug 100 is arranged on one side of the support slide plate 72, an extension plate 103 is arranged on the outer end of the stop plug 100 and on the upper side, a guide inclined surface 104 is arranged on the lower side, a spring 105 is arranged between the inner side of the extension plate 103 and the base shell 31, the L-shaped baffle 101 is used to limit the outward movement of the extension plate 103, a driving top rod 106 is arranged on the upper end of the hinged seat 86, and the upper end of the driving top rod 106 can be jacked on the guide inclined surface 104.

[0055] When the locking mechanism works, the second cylinder 85 pushes the hinged seat 86 to move upward, and the third rack 84 is driven to move laterally through the connecting rod 87, and the second gear 83 is driven to rotate by the third rack 84, so that the two locking rods 82 are simultaneously flipped upward to limit and lock the carrier 10, and the support plate 23 on the carrier 10 is particularly limited.

[0056] Thus, the transmission mechanism realizes the locking linkage through a simple mechanical structure, utilizes the cooperation of the spring 105, the guide inclined surface 104 and the driving jackscrew 106 to realize the automatic insertion and ejection of the stopper block 100, does not need an additional power source, reduces the equipment cost; at the same time, the structure is compact, the reliability is high, can quickly respond to the action of the locking mechanism, ensures that the support slide plate 72 and the carrier vehicle 10 are synchronously locked and unlocked, guarantees the stable operation of the conveying system.

[0057] Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A combination push-pull shuttle conveyor for an engineering machine, characterised in that: The utility model relates to a kind of transport systems, including longitudinal track group (1), multiple first transverse track groups (2) are arranged in longitudinal direction on the side of longitudinal track group (1), shuttle frame (3) is slid on longitudinal track group (1), and first chain conveyor (4) for driving shuttle frame (3) along longitudinal track group (1) sliding, second transverse track group (5) and push-pull mechanism are arranged on shuttle frame (3), second transverse track group (5) can be connected with first transverse track group (2) cooperation, further including the carrier (10) for carrying workpiece, push-pull mechanism is used to drive carrier (10) moves on first transverse track group (2) and second transverse track group (5) and carries out conveying, carrier (10) includes rectangular frame (21), push-pull mechanism includes base shell (31) arranged on shuttle frame (3), push-pull guide shaft (32) is slid in transverse direction on the side of base shell (31), movable hook assembly is arranged on the both ends of push-pull guide shaft (32) and cooperates with carrier (10), second chain conveyor (33) is arranged in base shell (31), chain support base plate (34) is arranged on the chain of second chain conveyor (33), first gear (35) is rotatably installed on chain support base plate (34), first rack (36) is fixedly arranged in base shell (31) and can be engaged with first gear (35), second rack (37) is fixedly arranged on the side of push-pull guide shaft (32) and can be engaged with first gear (35), the upper end of chain support base plate (34) is provided with support shaft (71), first gear (35) is rotatably sleeved on support shaft (71), support slide plate (72) is arranged on the upper end of support shaft (71), slide rail (73) is arranged on the inner side upper wall of base shell (31), sliding block (74) is slid on slide rail (73), sliding block (74) is fixedly arranged on support slide plate (72), further including locking mechanism that can lock carrier (10) on base shell (31), wherein, the locking mechanism includes mounting plate (81) that is spaced apart on the outside of base shell (31), locking lever (82) is rotatably arranged on each mounting plate (81), two locking levers (82) can be simultaneously turned up to limit and lock carrier (10), second gear (83) is arranged on the rotation shaft of locking lever (82), third rack (84) is slid in transverse direction on mounting plate (81) and can be engaged with second gear (83), connecting rod (87) is hingedly connected on the inner end of two third racks (84), second pneumatic cylinder (85) is arranged outside base shell (31) and between two mounting plates (81), the piston rod of second pneumatic cylinder (85) is arranged upwards and connected with hinged seat (86), one end of two connecting rods (87) is hingedly connected on hinged seat (86).A transmission mechanism is arranged on the base shell (31), when the locking mechanism locks the carrier (10), the support slide plate (72) can be locked through the transmission mechanism, the transmission mechanism comprises a movable stop block (100) which is arranged outside the base shell (31), an L-shaped baffle (101) is arranged outside the base shell (31) and above the stop block (100), a locking hole (102) is arranged on one side of the support slide plate (72) and used for inserting the stop block (100), an extension plate (103) is arranged on the outer end of the stop block (100) and above, a guide inclined surface (104) is arranged on the lower side of the stop block (100), a spring (105) is arranged between the extension plate (103) and the base shell (31), the L-shaped baffle (101) is used for limiting the outward movement of the extension plate (103), a driving top rod (106) is arranged on the upper end of the hinge seat (86), and the upper end of the driving top rod (106) can abut against the guide inclined surface (104).

2. A composite conveyor for an engineering machine push-pull shuttle according to claim 1, characterised in that: Supporting legs (22) with rollers are arranged at the lower corners of the rectangular frame (21), and a plurality of supporting plates (23) are arranged in the rectangular frame (21) in intervals.

3. The combination push-pull shuttle conveyor of claim 1, wherein: The movable hook assembly comprises a movable hook base plate (41) arranged on the push-pull guide shaft (32), a supporting seat (42) arranged on the movable hook base plate (41), a first air cylinder (43) arranged on the supporting seat (42), a hook piece (44) and a driving piece (45) respectively hingedly connected to the supporting seat (42), one end of the hook piece (44) and the driving piece (45) being hingedly connected through an intermediate rod (46), one end of the first air cylinder (43) away from the piston rod being hingedly connected to the supporting seat (42), the piston rod of the first air cylinder (43) being hingedly connected to the other end of the driving piece (45), the hook piece (44) being capable of being folded upward to abut against the rectangular frame (21) or being folded downward to be separated from the rectangular frame (21).

4. The combination push-pull shuttle conveyor for construction machines according to claim 1, characterized in that: V-shaped guide roller groups (51) are arranged on the base shell (31) on the upper and lower sides of the push-pull guide shaft (32), and the push-pull guide shaft (32) is arranged between the two V-shaped guide roller groups (51).

5. The combination push-pull shuttle conveyor of claim 1, wherein: Supporting plates (61) are arranged in the base shell (31) on the two sides of the chain of the second chain conveyor (33), and supporting wheels (62) are arranged on the two sides of the chain supporting base plate (34), the supporting wheels (62) rolling on the supporting plates (61).

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