Automatically returnable trolley and parts transport system including the trolley

Abstract

The present invention discloses an automatically returnable trolley and a parts transmission system including the trolley, and belongs to the field of assembly production lines. The automatically returnable trolley includes a frame, a force storage assembly and a positioning member. The frame includes a frame body and a wheel body assembly. The wheel body assembly includes a first wheel body. The frame body is provided with a first placement portion. The force storage assembly includes a first reset member, a first pulling member and a winding portion. The first end of the first pulling member is suitable for being driven by the first wheel body to move in a direction close to the steering portion, and is also suitable for being driven by the first reset member to move downward. The parts transmission system includes the above-mentioned trolley, and also includes a parts input rack and a storage container. The automatically returnable trolley of the present invention can automatically return to the initial position without being pushed by an operator, which is conducive to improving work efficiency. The parts transmission system is conducive to improving the efficiency of parts transmission or realizing the automatic return function of the trolley, which is conducive to improving work efficiency and reducing manual workload.

Description

Technical Field

[0001] The invention relates to special equipment for an assembly production line, in particular to a trolley capable of automatically returning and a parts transmission system comprising the trolley. Background Art

[0002] At present, on the assembly production line of industrial products such as automobiles, it is often necessary to transfer parts from the first station to the second station through a transport device to meet the assembly requirements of the second station; for example, there are generally multiple picking areas at the picking point, and different parts (such as car seat cushion sponges, car seat cushion leather covers, etc.) are placed in each picking area. When carrying out assembly production, it is necessary to continuously transfer parts from a certain picking area to the assembly area according to the assembly requirements of different models to realize assembly production; because the assembly time of some stations is long and the assembly precision requirements are high, and because the assembly requirements are different, the parts and transmission routes that need to be transferred are different. In order to ensure the mobility of part transmission, a trolley is generally used to realize the part transmission between different stations;

[0003] However, existing trolleys generally do not have an automatic walking function. When using the trolley to transfer parts, the trolley needs to be pushed back and forth manually so that the trolley can transfer parts back and forth between two workstations. The existing trolleys are cumbersome to operate and consume human resources. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, an object of the present invention is to provide a trolley that can automatically return. The trolley can realize the automatic return function of the trolley only by setting simple mechanical components, which can effectively reduce the waste of human resources.

[0005] A second object of the present invention is to provide a parts transmission system including the above-mentioned trolley, which facilitates the automatic return function of the trolley through the cooperation between the trolley and the parts input rack.

[0006] The third object of the present invention is to provide a parts transmission system including the above-mentioned trolley, which, through the cooperation between the trolley and the parts loading rack, makes it easier to transfer the parts on the trolley to the parts loading rack.

[0007] One of the purposes of the present invention is achieved by the following technical solution:

[0008] The trolley which can return automatically comprises a frame, a force storage assembly and a positioning member; the positioning member is used to be fixed to an external structure; the frame comprises a frame body and a wheel body assembly arranged at the bottom of the frame body, and the wheel body assembly comprises a first wheel body; the frame body is provided with a first placement portion for placing articles; the force storage assembly comprises a first reset member, a first pulling member and a winding portion; a steering portion is provided on the frame body, a first end of the first pulling member is connected to the first reset member, a second end of the first pulling member bypasses the steering portion and is connected to the winding portion, the steering portion has a load-bearing surface, and the first pulling member abuts against the load-bearing surface; the winding portion rotates synchronously with the first wheel body; the first end of the first pulling member is suitable for being driven by the first wheel body to move in a direction close to the steering portion, and is also suitable for being driven by the first reset member to move in a direction close to the bottom of the frame.

[0009] Further, the steering portion is a first steering member, the first steering member is fixed to the frame, a steering channel is provided in the first steering member, the steering portion is the steering channel, a first inlet and a first outlet are also provided on the first steering member, and the second end of the first pulling member passes through the first inlet and out of the first outlet.

[0010] Furthermore, the trolley also includes a position locking assembly; the position locking assembly includes a first slider, a trigger, a second pulling member and the positioning member, one end of the second pulling member is connected to the first slider, and the other end is connected to the positioning member, and the trigger is connected to the first slider; the frame has a pushing side and a delivery side that are relatively arranged, and the trolley is also provided with a first recovery part, the first recovery part is connected to the frame, the first recovery part has an inclined recovery plane, and the end of the first recovery part close to the pushing side is lower than the end of the first recovery part close to the delivery side; the frame is provided with a sliding guide rail, and the first slider can reciprocate along the stroke defined by the sliding guide rail; in the vertical direction, the trigger is arranged above the recovery plane; the positioning member has a locking position connected to an external structure, and when the first slider moves in a direction away from the delivery side, the second pulling member is used to pull the positioning member out of the locking position.

[0011] Furthermore, the first recovery part includes at least two recovery guide rails, both ends of the recovery guide rails are respectively connected to the frame body, and a plurality of rollers are provided on the recovery guide rails.

[0012] Furthermore, the frame has a pushing side surface and a delivery side surface that are arranged opposite to each other, the first placement portion has an inclined placement plane, and an end of the first placement portion close to the pushing side surface is higher than an end of the first placement portion close to the delivery side surface.

[0013] Furthermore, the trolley is also provided with an unloading trigger assembly; an end of the first placement portion close to the pushing side is higher than an end of the first placement portion close to the delivery side; the unloading trigger assembly includes a second slider, a connecting member, a blocking member, a second reset member, a first stroke member and a second stroke member; the first stroke member and the second stroke member are provided on the side of the frame close to the delivery side; the second slider cooperates with the first stroke member, and the second slider can slide horizontally along the first stroke member; the first placement portion has an inclined placement plane, the blocking member cooperates with the second stroke member, and the second reset member is provided between the blocking member and the second stroke member, and the blocking member has a blocking position protruding from the placement plane; when the second slider moves in a direction close to the pushing side, the blocking member is pulled to move in a direction close to the bottom, and the blocking member is disengaged from the blocking position; the second reset member is used to provide a reset force for the blocking member to move to the blocking position.

[0014] Furthermore, the trolley also includes a mode adjustment component; the mode adjustment component includes a first gear, a first rotating shaft and a third pulling member; the frame body is also provided with a transmission component and a limiting component, the transmission component includes a second gear and a second rotating shaft; the second rotating shaft passes through the first wheel body and the second gear in sequence, and the first wheel body, the second gear and the second rotating shaft rotate synchronously; the two ends of the second rotating shaft are rotatably connected to the frame body; the first rotating shaft passes through the first gear, the first gear rotates synchronously with the first rotating shaft, and the two ends of the first rotating shaft are connected to the limiting component; the third pulling member is connected to the first rotating shaft; the winding part is provided on the first rotating shaft; the first rotating shaft has a mating position, when the first rotating shaft is located at the mating position, the first gear is engaged with the second gear, and the first rotating shaft rotates synchronously with the second rotating shaft; the limiting component is used to limit the first rotating shaft to the mating position, and the third pulling member is used to pull the first rotating shaft out of the mating position.

[0015] Furthermore, the trolley also includes a steering positioning assembly; the steering positioning assembly includes a fourth pulling member and a latch; the wheel body assembly also includes a first universal wheel and a second universal wheel, the first wheel body is arranged close to the delivery side, and the first universal wheel and the second universal wheel are arranged close to the pushing side; the first universal wheel and the second universal wheel both have a steering platform, and a positioning slot is provided on the steering platform; a positioning hole is provided at the bottom of the frame, and the latch is passed through the positioning hole; the latch is connected to the fourth pulling member, and the latch can make vertical reciprocating movements relative to the positioning hole; the latch has a locking position inserted in the positioning slot, and when the latch is in the locking position, the latch abuts against the slot surface of the positioning slot, and the fourth pulling member is suitable for pulling the latch out of the locking position.

[0016] The second object of the present invention is achieved by adopting the following technical solution:

[0017] A parts transmission system includes the above-mentioned trolley that can automatically return, and also includes a parts input rack and a storage container; the trolley has a first position and a second position; the parts input rack has a positioning part, and when the trolley is located at the second position, the positioning member is detachably connected to the positioning part; the end of the first recovery part close to the pushing side is lower than the end of the first recovery part close to the delivery side; the parts input rack is provided with a second recovery part, and the second recovery part has a recovery plane; when the storage container slides from the second recovery part to the first recovery part, it is suitable for pushing the trigger part so that the positioning member is disengaged from the locking position, and when the positioning member is disengaged from the locking position, the first reset member is suitable for driving the trolley to move from the second position to the first position.

[0018] The third object of the present invention is achieved by adopting the following technical solution:

[0019] A parts transmission system comprises the above-mentioned trolley capable of automatically returning, and also comprises a parts feeding rack and a storage container, wherein the storage container is used to place items to be transmitted; the second slider has an initial position and a trigger position, when the second slider is located at the trigger position, the blocking member is located at the blocking position, and when the second slider is located at the initial position, the blocking member is disengaged from the blocking position; a push portion is provided on a side of the parts feeding rack close to the trolley; when the second slider is located at the initial position, the second slider protrudes in a direction close to the parts feeding rack relative to the delivery side; when the second slider is located at the trigger position, one side of the second slider abuts against the delivery side, and the other side abuts against the parts feeding rack; the parts feeding rack is provided with a second placement portion, and when the second slider is located at the trigger position, the storage container is suitable for sliding from the first placement portion to the second placement portion.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) The trolley is provided with a force storage component and a positioning member, and the force storage component cooperates with the first wheel body, so that after the trolley moves from the first station to the second station, it only needs to disconnect the positioning member from the external fixing device to make the trolley automatically return to the first station (such as the picking point), without the need for the operator to push the trolley from the second station (such as the parts input point) back to the first station, which is conducive to improving work efficiency;

[0022] (2) The setting of the parts transmission system is conducive to improving the efficiency of parts transmission or realizing the automatic return function of the trolley, which is conducive to improving work efficiency and reducing manual workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the first overall structure of the trolley capable of automatically returning according to the present invention;

[0024] Figure 2 for Figure 1 A magnified view of part A in FIG.

[0025] Figure 3 It is a second overall structural schematic diagram of the trolley capable of automatically returning according to the present invention;

[0026] Figure 4 for Figure 3 A magnified view of part B in FIG.

[0027] Figure 5 It is a schematic diagram of the structure of the power storage component and the mode adjustment component of the present invention;

[0028] Figure 6 It is a structural schematic diagram of the position locking assembly of the present invention;

[0029] Figure 7 It is a schematic diagram of the uninstall trigger component of the present invention;

[0030] Figure 8 It is a schematic diagram of the steering positioning assembly of the present invention (only part is shown);

[0031] Fig. 9 It is a schematic diagram of the parts transmission system of the present invention;

[0032] In the figure: 10, frame; 11, frame body; 1101, pushing side; 1102, delivery side; 111, steering part; 121, first wheel body; 122, first universal wheel; 123, second universal wheel; 124, positioning groove; 13, first placement part; 14, first recovery part; 151, second gear; 152, second rotating shaft; 161, connecting bracket;

[0033] 21. a first restoring member; 22. a first pulling member;

[0034] 31. first slider; 32. trigger member; 33. second pulling member; 34. positioning member;

[0035] 41. second slider; 42. connecting member; 43. blocking member; 44. first stroke member; 45. second stroke member;

[0036] 51. first gear; 52. first rotating shaft; 53. third pulling member;

[0037] 61. fourth pulling member; 62. latch;

[0038] 70. Parts loading rack; 72. Second placement section; 73. Second recycling section;

[0039] 80. Storage container;

[0040] 91. Second steering member; 92. Third steering member; 93. Adjustment handle; 94. Positioning handle. DETAILED DESCRIPTION

[0041] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0042] It should be noted that the automatically returnable trolley of the present invention can be used not only in automobile assembly production lines, but also in other assembly production lines; when a component is referred to as being "fixed to" another component, it can be directly on the other component or there can also be a centered component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there can also be a centered component. When a component is considered to be "set on" another component, it can be directly set on the other component or there can also be a centered component. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0044] like Figure 1-9As shown, this embodiment provides a trolley that can automatically return, the trolley includes a frame 10, a power storage component for storing energy when the trolley is driven by an external force to move, and a positioning member 34; the positioning member 34 is used to cooperate with the external structure to temporarily fix the trolley so that the trolley remains in the current position to facilitate loading or unloading of parts to be transported; wherein, as Figure 1-4 As shown, the frame 10 includes a frame body 11 and a wheel body assembly arranged at the bottom of the frame body 11, the wheel body assembly includes a first wheel body 121, and the frame body 11 is provided with a first placement portion 13 for placing articles; the power storage assembly includes a first reset member 21, a first pulling member 22 and a winding portion, and the first pulling member 22 is a non-elastic pulling member; a steering portion 111 is provided on the frame body 11, the first end of the first pulling member 22 is connected to the first reset member 21, the second end of the first pulling member 22 bypasses the steering portion 111 and is connected to the winding portion, the steering portion 111 has a load-bearing surface, and the first pulling member 22 abuts against the load-bearing surface; the winding portion rotates synchronously with the first wheel body 121; the first end of the first pulling member 22 is suitable for being driven by the first wheel body 121 to move in a direction close to the steering portion 111, and the first end of the first pulling member 22 is also suitable for being driven by the first reset member 21 to move in a direction close to the bottom of the frame body 11.

[0045] The operating principle of the trolley is as follows:

[0046] When the trolley stops at the first position (such as the picking point), the parts to be transported are placed on the first placement portion 13 of the trolley. A storage plate or a storage box can be placed on the first placement portion 13 for loading the parts, or the parts can be directly placed on the first placement portion 13. After the parts are loaded, the trolley is pushed to the second position by an external force (such as by an operator), and the parts are unloaded at the second position. In the process of pushing the trolley from the first position to the second position, the first wheel body 121 contacts the ground and rotates, and the winding portion directly or indirectly The first wheel 121 is connected to realize the synchronous rotation of the winding part and the first wheel 121. When the first wheel 121 rotates, since the winding part is connected to the second end of the first pulling member 22 and the winding part is rotating, the second end of the first pulling member 22 is wound around the winding part in a circle, and the winding part overcomes the restoring force of the first reset member 21 to realize the winding of the first pulling member 22. That is, when the winding part is wound around the second end of the first pulling member 22, the connection side of the first reset member 21 and the first pulling member 22 is pulled away from the frame by the first pulling member 22. 11, so as to realize the accumulation of restoring force; when the trolley moves to the second position, the positioning member 34 is connected to the external device to fix the trolley in the second position, so as to prevent the trolley from being separated from the second position by the restoring force of the first restoring member 21 without external force, thereby ensuring the normal unloading work; when the parts are unloaded, it is necessary to return the trolley to the first position, only the connection between the positioning member 34 and the external structure needs to be disconnected, at this time, the first end of the first pulling member 22 is provided by the first restoring member 21 to reset the trolley. Due to the action of force, the first end of the first pulling member 22 is pulled by the first reset member 21 and moves toward the bottom of the frame body 11. At this time, the second end of the first pulling member 22 is separated from the winding member and the winding state. Since the first pulling member 22 is connected to the winding part, the first pulling member 22 drives the winding part to rotate, and the first wheel body 121 rotates synchronously with the winding part. Since the first wheel body 121 rotates in the opposite direction, the driving trolley moves in the direction of returning to the first position, so as to automatically return to the first position, that is, the first reset member 21 provides the power for automatic return.

[0047] Specifically, the synchronous rotation of the winding portion and the first wheel body 121 is achieved by a direct or indirect connection between the winding portion and the first wheel body 121. One implementation method is: a rotating shaft is provided in the middle of the first wheel body 121, the rotating shaft is fixed to the first wheel body 121, the rotating shaft is rotatably connected to the frame body 11, and the winding portion is located on the rotating shaft. The winding portion can be the main body of the rotating shaft, or it can be located on a winding block further arranged on the rotating shaft; when the size of the winding portion is larger, when the first wheel body 121 rotates one circle, the length of the first pulling member 22 that can be wound is longer, the distance moved by the first reset member 21 and the connecting end of the first pulling member 22 is longer, and the reset force accumulated by the first reset member 21 is greater. In addition, the characteristics of the first reset member 21 itself also affect the degree of accumulation of the reset force; in the specific implementation process, the specific radius (size) of the winding portion can be selected according to the size of the distance between the first position and the second position, and a suitable first reset member 21 can be selected; of course, the winding portion can also be set on other structures.

[0048] Specifically, in order to realize the function of accumulating restoring force of the first restoring member 21, the present embodiment preferably uses a counterweight as the first restoring member 21. When the first wheel body 121 rotates to drive the winding portion to rotate to wrap around the second end of the first pulling member 22, the counterweight is pulled up. When the counterweight is pulled and moved by the first pulling member 22, the accumulated gravitational potential energy is the restoring force. In addition to using a counterweight as the first restoring member 21, a strong spring can also be used as the first restoring member 21, one end of the strong spring is connected to the bottom of the frame body 11, and the other end is connected to the first pulling member 22. Among them, the weight of the counterweight and the elastic coefficient of the strong spring can be selected according to the size of the distance between the first position and the second position.

[0049] Specifically, the first pulling member 22 has at least a first flexible segment and a second flexible segment, and the other portion may be a rigid segment. The first flexible segment is used to cooperate with the steering portion 111, and the second flexible segment is used to cooperate with the winding portion. Of course, the first pulling member 22 may be a traction rope.

[0050] Specifically, in order to enable the first restoring member 21 to accumulate restoring force when the second end of the first traction rope is wound around the winding portion, a turning portion 111 is provided so that the first restoring member 21 has a deformation space or a displacement space; in order to facilitate the accumulation of restoring force, the turning portion 111 is provided at the top of the frame 11. The turning portion 111 can be integrally formed with the frame 11, or can be separately connected.

[0051] Preferably, if Figure 4As shown, in order to facilitate the first restoring member 21 to accumulate the restoring force, the steering portion 111 is the first steering member, the first steering member is fixed to the frame 11, a steering channel is provided in the first steering member, the steering portion 111 is the steering channel, and the first steering member is also provided with a first inlet and a first outlet, the second end of the first pulling member 22 enters from the first inlet and exits from the first outlet; the setting of the steering channel, the first inlet and the first outlet is conducive to fixing the pulling direction of the first pulling member 22.

[0052] Specifically, the specific directions of the first inlet and the first outlet can be set according to specific turning requirements.

[0053] Preferably, Figure 4 As shown, in order to make the overall structure of the trolley neat and simple and to ensure the stability of the pulling function of the first pulling member 22, the trolley also includes a second steering member 91. The second steering member 91 is arranged at the bottom of the frame 11. The second end of the first pulling member 22 extends upward through the first steering member, and then extends downward through the second steering member 91, and then extends in the horizontal direction to connect with the winding part located on the other side of the trolley, thereby avoiding the first pulling member 22 from passing through the middle space of the frame 11.

[0054] On the basis of the above solution, in order to conveniently lock the trolley in the second position, and also to facilitate the trolley to automatically return to the first position after leaving the second position, the trolley also includes a position locking component.

[0055] Preferably, if Figure 1 , 6As shown, the position locking assembly includes a first slider 31, a trigger member 32, a second pulling member 33 and a positioning member 34. One end of the second pulling member 33 is connected to the first slider 31, and the other end is connected to the positioning member 34. The trigger member 32 is connected to the first slider 31; the frame 11 has a pushing side surface 1101 and a delivery side surface 1102 that are relatively arranged. The pushing side surface 1101 can be used to set a handle to facilitate the operator to push the trolley to move. When unloading the transmitted parts, they are unloaded through the delivery side surface 1102, and the positioning member 34 is arranged close to the delivery side surface 1102; at the same time, the trolley is also provided with a first recovery part 14, which is connected to the frame 11, and the first recovery part 14 has an inclined The inclined recovery plane, the end of the first recovery part 14 close to the pushing side 1101 is lower than the end of the first recovery part 14 close to the delivery side 1102; the frame 11 is provided with a sliding guide rail, and the first slider 31 can reciprocate along the stroke limited by the sliding guide rail; in the vertical direction, the trigger member 32 is arranged higher than the recovery plane; the positioning member 34 has a locking position connected to the external structure, and when the positioning member 34 is in the locking position, it provides a positioning force to the trolley to prevent the trolley from moving to the first position under the action of the first reset member 21 when the unloading work is not completed; when the first slider 31 moves in the direction away from the delivery side 1102, the second pulling member 33 is used to pull the positioning member 34 out of the locking position.

[0056] Specifically, the working principle of the above position locking component is as follows:

[0057] When the trolley moves from the first position to the second position, the positioning member 34 is connected to the external fixing device. The positioning member 34 can be a hook. The positioning member 34 is connected to the external fixing device by hooking the hook with the external fixing device. When the positioning member 34 is connected to the external fixing device, the positioning member 34 pulls the second pulling member 33 to further pull the first slider 31, so that the trigger member 32 moves toward the direction close to the delivery side 1102. When the parts on the trolley are unloaded, the operator only needs to remove the external items (such as the storage board or storage box for carrying the parts) from the trolley. The delivery side 1102 is placed on the recovery part. Based on the special structural setting of the recovery part, external objects can slide or roll along the inclined direction of the recovery part. When the external objects slide or roll on the recovery plane, they abut against the trigger member 32 to push the first slider 31 to move along the sliding guide rail to the end away from the delivery side 1102, so as to drive the second pulling member 33 to pull the positioning member 34 back, so that the positioning member 34 is out of the locked position. At this time, the reset force of the first reset member 21 acts on the first wheel body 121 to drive the trolley to move to the first position. Through the setting of the position locking component and the setting of the matching relationship between the first slider 31, the trigger member 32 and the recovery part in the position locking component, when using the trolley, only a triggering object (such as a storage plate) needs to be placed on the recovery part to make the trolley out of the locked position, which is easy to operate and makes the triggering method of the automatic return function of the trolley simple.

[0058] Preferably, in order to facilitate triggering the automatic return function of the trolley, the first recovery part 14 includes at least two recovery rails, both ends of which are respectively connected to the frame 11, and a plurality of rollers are provided on the recovery rails. The setting of the rollers facilitates the triggering items used to trigger the automatic return function to slide quickly and stably along the recovery plane when the trolley is in use, so as to push the trigger member 32.

[0059] On the basis of the above solution, in order to facilitate the transmission function of the trolley and to facilitate the unloading of the parts placed in the first placement portion 13, the trolley is also provided with an unloading trigger component.

[0060] Preferably, the frame 11 has a pushing side 1101 and a delivery side 1102 that are relatively arranged, and the first placement portion 13 has an inclined placement plane. The end of the first placement portion 13 close to the pushing side 1101 is higher than the end of the first placement portion 13 close to the delivery side 1102, so that the parts can slide along the inclined placement plane to an external device located at the second position for receiving the parts.

[0061] Preferably, in order to ensure that items placed on the first placement portion 13 of the trolley (such as parts such as seat cushions, or storage boxes loaded with several parts) can remain on the first placement portion 13 during the movement of the trolley, and in order to ensure that when the trolley moves to the second position, there is no need to use manpower to move the parts located on the first placement portion 13 to the unloading platform (such as the parts loading rack 70) in the second position, the trolley is also provided with an unloading trigger component.

[0062] Specifically, Figure 1 , 7 As shown, one end of the first placement portion 13 close to the pushing side 1101 is higher than one end of the first placement portion 13 close to the delivery side 1102; the unloading trigger assembly includes a second slider 41, a connecting member 42, a blocking member 43, a second reset member, a first stroke member 44 and a second stroke member 45; the first stroke member 44 and the second stroke member 45 are provided on the side of the frame 11 close to the delivery side 1102; the second slider 41 cooperates with the first stroke member 44, and the second slider 41 can slide horizontally along the first stroke member 44; the first placement portion 13 has an inclined placement plane, the blocking member 43 cooperates with the second stroke member 45, and a second reset member is provided between the blocking member 43 and the second stroke member 45, and the blocking member 43 has a blocking position protruding from the placement plane; when the second slider 41 moves in a direction close to the pushing side 1101, the blocking member 43 is pulled to move in a direction close to the bottom, and the blocking member 43 is out of the blocking position; the second reset member is used to provide a reset force for the blocking member 43 to move to the blocking position.

[0063] Specifically, the working principle of the above uninstall trigger component is as follows:

[0064] When the parts are being transferred, a number of parts are directly placed on the first placement portion 13, or a storage plate or storage box is placed on the first placement portion 13, and a number of parts are loaded on the storage plate or storage box. During the movement of the trolley, the blocking member 43 in the unloading trigger assembly is located at the blocking position, and the parts or storage container 80 are blocked by the blocking member 43 extending out of the storage plane and remain located on the first placement portion 13; based on the structure of the trolley provided with the unloading trigger assembly, when the trolley moves to the second position and needs to unload the parts, the second slider 41 is pushed, and the blocking function of the blocking member 43 can be unlocked, so that the second slider 41 moves in a direction close to the pushing side surface 1101, so as to pull the connecting member 42 and pull the blocking member 43 to move downward, so that there is no protruding obstruction on the storage plane, and the parts or storage container 80 on the first placement portion 13 will slide downward along the inclined storage plane of the first placement portion 13, slide in a direction close to the delivery side surface 1102, slide away from the trolley, and complete the unloading of the parts.

[0065] Among them, in the parts transmission system using the trolley, the parts can be unloaded by cooperating with the trolley in any of the following ways:

[0066] (1) A component loading rack 70 is provided at the second position. The component loading rack 70 has an unloading platform. The height of the unloading platform close to the trolley side is the same as (or slightly lower than) the height of the first placement portion 13 close to the delivery side surface 1102. When the trolley moves to the second position, the second slider 41 is pushed by the component loading rack 70 and moves in a direction close to the pushing side surface 1101, so that the blocking member 43 is out of the blocking position, and the component (or the storage container 80 carrying the component) on the first placement portion 13 slides in the direction of the unloading platform and slides onto the unloading platform to complete the unloading of the component;

[0067] (2) A component loading rack 70 is provided at the second position. The component loading rack 70 has an unloading platform. The height of the unloading platform close to the trolley side is the same as (or slightly lower than) the height of the first placement portion 13 close to one end of the delivery side surface 1102. When the trolley moves to the second position, the second slider 41 is manually pushed toward the pushing side surface 1101, so that the blocking member 43 is disengaged from the blocking position, and the component (or the storage container 80 carrying the component) located on the first placement portion 13 slides toward the unloading platform and slides onto the unloading platform to complete the unloading of the component.

[0068] Preferably, the first stroke member 44 is a guide rail arranged in the horizontal direction, the second stroke member 45 is a guide column arranged in the vertical direction, a hollow channel is provided in the guide column, the blocking member 43 is a pin column, and the end of the pin column close to the bottom of the frame body 11 has a first connecting portion and a second connecting portion, the first connecting portion is connected to the connecting member 42, the second connecting portion is connected to the second reset member, and the other end of the second reset member is connected to the bottom surface of the guide column; the unloading trigger assembly can also include a third steering member 92, one end of the connecting member 42 is connected to the pin column, and the other end extends downward, passes through the third steering member 92, and extends horizontally in the direction close to the pushing side 1101, and is connected to the second slider 41.

[0069] Specifically, the provision of the third steering member 92 is conducive to converting the horizontal displacement of the second slider 41 into the vertical displacement of the pin; the provision of the guide column is conducive to ensuring the stability of the vertical displacement path of the pin and to keeping the pin in the blocking position; the provision of the second reset member is conducive to enabling the pin to automatically return to the blocking position when the second slider 41 is free from the resistance of external force.

[0070] On the basis of the above scheme, in order to avoid unnecessary power accumulation of the trolley when it is not needed, that is, to enable the "power accumulation-automatic return" function of the trolley to be used according to specific usage conditions, the trolley also includes a mode adjustment component. Through the setting of the mode adjustment component, the working mode of the trolley can be adjusted so that the trolley has a walking power accumulation function or does not have a walking power accumulation function.

[0071] Specifically, Figure 1 , 2 5, the mode adjustment assembly includes a first gear 51, a first rotating shaft 52 and a third pulling member 53; the frame 11 is also provided with a transmission assembly and a limit assembly, the transmission assembly includes a second gear 151 and a second rotating shaft 152; the second rotating shaft 152 passes through the first wheel body 121 and the second gear 151 in sequence, and the first wheel body 121, the second gear 151 and the second rotating shaft 152 rotate synchronously; both ends of the second rotating shaft 152 are rotatably connected to the frame 11; the first rotating shaft 52 passes through the first gear 51, the first gear 151 and the second rotating shaft 152 rotate synchronously; The wheel 51 rotates synchronously with the first rotating shaft 52, and both ends of the first rotating shaft 52 are connected to the limiting assembly; the third pulling member 53 is connected to the first rotating shaft 52; the winding part is arranged on the first rotating shaft 52; the first rotating shaft 52 has a matching position, and when the first rotating shaft 52 is in the matching position, the first gear 51 is engaged with the second gear 151, and the first rotating shaft 52 rotates synchronously with the second rotating shaft 152; the limiting assembly is used to limit the first rotating shaft 52 to the matching position, and the third pulling member 53 is used to pull the first rotating shaft 52 out of the matching position.

[0072] Specifically, the working principle of the above mode adjustment component is as follows:

[0073] When the first rotating shaft 52 in the mode adjustment component is in the mating position, the first gear 51 is engaged with the second gear 151, and the trolley has the function of storing power for walking at this time; when the trolley is pushed to walk, the first wheel body 121 rotates, driving the second rotating shaft 152 to rotate, and then driving the second gear 151 to rotate. Since the first gear 51 is engaged with the second gear 151, the first gear 51 rotates synchronously, the first rotating shaft 52 is fixedly connected to the first gear 51, and the first rotating shaft 52 rotates synchronously. The winding part is preferably arranged on the first rotating shaft 52. At this time, when the trolley is pushed to walk, the rotation of the first wheel body 121 can drive the winding part to wrap around the first pulling member 22, so that the first reset member 21 stores power, and the trolley has the function of storing power for walking.

[0074] When the trolley does not need to move and accumulate power (for example, when the operator needs to push the trolley to another location to perform other operations), the operator only needs to pull the third pulling member 53, so that the third pulling member 53 can pull the first rotating shaft 52 out of the mating position, so that the first gear 51 and the second gear 151 are separated and not meshed, and the power storage component will not accumulate power unnecessarily.

[0075] Specifically, the first rotating shaft 52, the third pulling member 53 and the frame 11 can cooperate with each other through any of the following implementations to adjust the working mode of the trolley:

[0076] (1) Figure 2 As shown, the mode adjustment component also includes a connecting bracket 161, the connecting bracket 161 has a first end and a second end, a rotating shaft is passed through the middle of the connecting bracket 161, the rotating shaft is rotatably connected to the frame body 11, the first rotating shaft 52 is fixedly connected to the first end of the connecting bracket 161 on both sides, the second end of the connecting bracket 161 is connected to the frame body 11 through a spring, and the third pulling member 53 is connected to the first end of the connecting bracket 161; when the third pulling member 53 pulls the connecting bracket 161, the first end driven by the connecting bracket 161 moves upward with the rotating shaft as the rotation axis, drives the first rotating shaft 52 to move upward, and the first gear 51 is disengaged from the second gear 151; when the pulling force of the third pulling member 53 is loosened, the second end of the connecting bracket 161 is moved upward by the spring restoring force, drives the first end of the connecting bracket 161 to rotate around the rotating shaft, the first rotating shaft 52 moves downward, and the first gear 51 resumes the engagement with the second gear 151;

[0077] (2) A vertical limit member is provided on the frame 11, and a sliding groove is provided in the middle of the vertical limit member. The sliding groove has a vertical strip limit groove. The first rotating shaft 52 passes through two vertical strip limit grooves. The first gear 51 is sleeved and fixed on the first rotating shaft 52, and the first gear 51 is provided in the sliding groove, and a counterweight is provided on the first rotating shaft 52; when the third pulling member 53 does not pull the first rotating shaft 52, the first gear 51 falls down due to gravity and cooperates with the second gear 151; when the third pulling member 53 pulls the first rotating shaft 52, the first gear 51 moves upward and disengages from the second gear 151.

[0078] Specifically, the third pulling member 53 is a rope, and of course, it can also be a flexible pulling belt.

[0079] Preferably, the mode adjustment assembly also includes an adjustment handle 93, which is rotatably connected to the top of the frame 11, and the other end of the third pulling member 53 away from the first rotating shaft 52 is connected to the first side of the adjustment handle 93. The operator pushes the second side of the adjustment handle 93, and the first side rotates around the connecting shaft, so that the first side moves upward, driving the third pulling member 53 to move upward, thereby further driving the first gear 51 to move upward.

[0080] Preferably, in order to facilitate the operator to push or turn the adjustment handle 93, the adjustment handle 93 is arranged close to the pushing side 1101 of the trolley, and the first universal wheel 122 and the second universal wheel 123 are arranged close to the pushing side 1101; the mode adjustment component also includes a plurality of adjustment steering members, and the adjustment steering members are used to adjust the extension direction of the third pulling member 53, which is conducive to converting the angular displacement into vertical displacement, then into water displacement, and then into vertical displacement, and at the same time it is convenient to limit the extension direction of the third pulling member 53, so that the overall structure of the trolley is simple.

[0081] On the basis of the above scheme, in order to enable the trolley to move stably on a predetermined route (when pushed from the first position to the second position, or automatically return from the second position to the first position), and to enable the trolley to be flexibly applicable to other work scenarios, that is, in order to enable the trolley to move forward and backward in a directional manner, as well as to move in universal directions to meet the picking operations at picking points in different positions, the wheel body assembly also includes a universal wheel, and the trolley also includes a steering positioning assembly; wherein the universal wheel can facilitate the steering and movement of the trolley and is suitable for other work scenarios, and the steering positioning assembly is suitable for locking the steering function of the universal wheel, so that the trolley can stably move on the predetermined route.

[0082] Specifically, Figure 1 , 8 As shown, the steering positioning assembly includes a fourth pulling member 61 and a latch 62; the wheel body assembly also includes a first universal wheel 122 and a second universal wheel 123, the first wheel body 121 is arranged close to the delivery side 1102, and the first universal wheel 122 and the second universal wheel 123 are arranged close to the pushing side 1101; the first universal wheel 122 and the second universal wheel 123 both have a steering platform, and a positioning slot 124 is provided on the steering platform; a positioning hole is provided at the bottom of the frame body 11, and the latch 62 is inserted into the positioning hole; the latch 62 is connected to the fourth pulling member 61, and the latch 62 can make vertical reciprocating movements relative to the positioning hole; the latch 62 has a locking position inserted in the positioning slot 124, and when the latch 62 is in the locking position, the latch 62 abuts against the slot surface of the positioning slot 124, and the fourth pulling member 61 is suitable for pulling the latch 62 out of the locking position.

[0083] Specifically, when the latch 62 is out of the locked position, the first universal wheel 122 and the second universal wheel 123 can realize universal rotation. When the fourth pulling member 61 releases the pulling force on the latch 62, the latch 62 returns to the locked position by gravity or other reset members.

[0084] Preferably, the steering positioning assembly also includes a positioning handle 94, which is rotatably connected to the top of the frame 11, and the other end of the fourth pulling member 61 away from the pin 62 is connected to the first side of the positioning handle 94. The operator pushes the second side of the positioning handle 94, and the first side rotates around the connecting axis, so that the first side moves upward, driving the fourth pulling member 61 to move upward, thereby further driving the pin 62 to move upward.

[0085] Preferably, the steering positioning assembly also includes a plurality of positioning steering members, which are used to adjust the extension direction of the fourth pulling member 61, which is conducive to converting the rotational force into vertical displacement force and is convenient for limiting the extension direction of the fourth pulling member 61, so that the overall structure of the trolley is simple.

[0086] like Figure 1-9 As shown, this embodiment also provides a parts transmission system, which includes the automatically returnable trolley described in the above scheme, and also includes a parts input rack 70 for cooperating with the trolley, and also includes a storage container 80 for placing parts, and the storage container 80 is a storage plate or a storage box.

[0087] Specifically, the trolley has a first position and a second position; the component input rack 70 has a positioning portion, and when the trolley is in the second position, the positioning member 34 is detachably connected to the positioning portion; an end of the first recovery portion 14 close to the pushing side 1101 is lower than an end of the first recovery portion 14 close to the delivery side 1102; the component input rack 70 is provided with a second recovery portion 73, and the second recovery portion 73 has a recovery plane; when the storage container 80 slides from the second recovery portion 73 to the first recovery portion 14, it is suitable for pushing the trigger member 32, so that the positioning member 34 is disengaged from the locked position, and when the positioning member 34 is disengaged from the locked position, the first reset member 21 is suitable for driving the trolley to move from the second position to the first position.

[0088] By setting and cooperating the second recovery part 73 of the component input rack 70, the first recovery part 14 of the trolley and the storage container 80, when the components are transferred, a plurality of components are placed in the storage container 80. When the trolley moves to the second position, the components are unloaded or the trolley automatically returns to the first position by simply placing the storage container 80 in the second recovery part 73. The operation process is simple and convenient, saving manpower, and the operator can trigger the automatic return function of the trolley without moving.

[0089] like Figure 1-9As shown, the present embodiment further provides a parts transmission system, which also includes a parts feeding rack 70 and a storage container 80, the storage container 80 is used to place the items to be transmitted; the second slider 41 has an initial position and a trigger position, when the second slider 41 is at the trigger position, the blocking member 43 is at the blocking position, when the second slider 41 is at the initial position, the blocking member 43 is out of the blocking position; the side of the parts feeding rack 70 close to the trolley is provided with a push portion; when the second slider 41 is at the initial position, the second slider 41 protrudes in a direction close to the parts feeding rack 70 relative to the delivery side 1102; when the second slider 41 is at the trigger position, one side of the second slider 41 abuts against the delivery side 1102, and the other side abuts against the parts feeding rack 70; the parts feeding rack 70 is provided with a second placement portion 72, when the second slider 41 is at the trigger position, the storage container 80 is suitable for sliding from the first placement portion 13 to the second placement portion 72.

[0090] Through the cooperation between the component loading rack 70 and the trolley, when the trolley is pushed to the second position, the second slider 41 of the trolley will abut against the component loading rack 70. Since the relative position of the component loading rack 70 is fixed, the second slider 41 is pushed by the reaction force and slides to the trigger position, so that the blocking member 43 is out of the blocking position. At this time, since the first placement portion 13 is inclined, the storage container 80 with a number of components placed therein will slide along the first placement portion 13 to the second placement portion 72; that is, the operator only needs to push the trolley to the second position to make the components automatically slide onto the component loading rack 70 to complete the unloading work. There is no need for manual movement for unloading. The operation process is simple and convenient, saving manpower. The operator does not need to move around to complete the transmission and unloading of components.

[0091] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. The trolley capable of automatically returning is characterized by: It includes a vehicle frame, a power storage assembly and a positioning piece; the positioning piece is used to be fixed to an external structure; The frame includes a frame body and a wheel assembly arranged at the bottom of the frame body, wherein the wheel assembly includes a first wheel body; the frame body is provided with a first placement portion for placing articles; The power storage assembly includes a first reset member, a first pulling member and a winding portion; the frame is provided with a steering portion, the first end of the first pulling member is connected to the first reset member, the second end of the first pulling member bypasses the steering portion and is connected to the winding portion, the steering portion has a load-bearing surface, the first pulling member abuts against the load-bearing surface; the winding portion rotates synchronously with the first wheel body; The first end of the first pulling member is adapted to be driven by the first wheel body to move toward the direction approaching the steering portion, and is also adapted to be driven by the first resetting member to move toward the direction approaching the bottom of the frame body; The trolley also includes a position locking assembly; The position locking assembly comprises a first slider, a trigger, a second pulling member and the positioning member, one end of the second pulling member is connected to the first slider, and the other end is connected to the positioning member, and the trigger is connected to the first slider; The frame body has a pushing side surface and a delivery side surface that are arranged opposite to each other, and the trolley is also provided with a first recovery part, the first recovery part is connected to the frame body, the first recovery part has an inclined recovery plane, and an end of the first recovery part close to the pushing side surface is lower than an end of the first recovery part close to the delivery side surface; The frame is provided with a sliding guide rail, and the first slider can reciprocate along the stroke defined by the sliding guide rail; in the vertical direction, the trigger member is arranged higher than the recovery plane; the positioning member has a locking position connected to the external structure, and when the first slider moves in a direction away from the delivery side, the second pulling member is used to pull the positioning member out of the locking position; The frame body has a pushing side surface and a delivery side surface that are arranged opposite to each other, the first placement portion has an inclined placement plane, and an end of the first placement portion close to the pushing side surface is higher than an end of the first placement portion close to the delivery side surface; The trolley is also provided with an unloading trigger assembly; An end of the first placement portion close to the pushing side is higher than an end of the first placement portion close to the delivery side; the unloading trigger assembly includes a second slider, a connecting member, a blocking member, a second reset member, a first stroke member and a second stroke member; the first stroke member and the second stroke member are provided on the side of the frame close to the delivery side; The second slider cooperates with the first stroke member, and the second slider can slide horizontally along the first stroke member; the first placement portion has an inclined placement plane, the blocking member cooperates with the second stroke member, a second reset member is provided between the blocking member and the second stroke member, and the blocking member has a blocking position protruding from the placement plane; When the second sliding block moves toward the direction approaching the pushing side surface, the blocking member is pulled toward the direction approaching the bottom, and the blocking member is separated from the blocking position; the second restoring member is used to provide a restoring force for the blocking member to move to the blocking position; The trolley also includes a mode adjustment component; The mode adjustment assembly includes a first gear, a first rotating shaft and a third pulling member; the frame is also provided with a transmission assembly and a limit assembly, and the transmission assembly includes a second gear and a second rotating shaft; The second rotating shaft passes through the first wheel body and the second gear in sequence, and the first wheel body, the second gear and the second rotating shaft rotate synchronously; both ends of the second rotating shaft are rotatably connected to the frame body; the first rotating shaft passes through the first gear, and the first gear rotates synchronously with the first rotating shaft, and both ends of the first rotating shaft are connected to the limiting assembly; the third pulling member is connected to the first rotating shaft; the winding part is arranged on the first rotating shaft; The first rotating shaft has a matching position. When the first rotating shaft is located at the matching position, the first gear meshes with the second gear, and the first rotating shaft and the second rotating shaft rotate synchronously. The limiting assembly is used to limit the first rotating shaft to the matching position, and the third pulling member is used to pull the first rotating shaft out of the matching position. The trolley also includes a steering and positioning assembly; The steering positioning assembly includes a fourth pulling member and a latch; The wheel assembly further comprises a first universal wheel and a second universal wheel, wherein the first wheel is arranged close to the delivery side, and the first universal wheel and the second universal wheel are arranged close to the pushing side; the first universal wheel and the second universal wheel both have a steering platform, and a positioning slot is arranged on the steering platform; a positioning hole is arranged at the bottom of the frame, and the latch is inserted into the positioning hole; The latch is connected to the fourth pulling member, and the latch can make vertical reciprocating movements relative to the positioning hole; the latch has a locking position inserted in the positioning groove, and when the latch is in the locking position, the latch abuts against the groove surface of the positioning groove, and the fourth pulling member is suitable for pulling the latch out of the locking position.

2. The automatically returnable trolley according to claim 1, characterized in that: The steering portion is a first steering member, which is fixed to the frame. A steering channel is provided inside the first steering member. The steering portion is the steering channel. A first inlet and a first outlet are also provided on the first steering member. The second end of the first pulling member enters through the first inlet and exits through the first outlet.

3. The automatically returnable trolley according to claim 1, characterized in that: The first recovery part includes at least two recovery guide rails, both ends of which are respectively connected to the frame body, and a plurality of rollers are arranged on the recovery guide rails.

4. A parts transport system, comprising the automatically returnable trolley as claimed in any one of claims 1 to 3, characterized in that: It also includes parts input racks and storage containers; The trolley has a first position and a second position; the component input rack has a positioning portion, and when the trolley is located at the second position, the positioning member is detachably connected to the positioning portion; An end of the first recovery part close to the pushing side is lower than an end of the first recovery part close to the delivery side; the component input frame is provided with a second recovery part, and the second recovery part has a recovery plane; When the storage container slides from the second recovery part to the first recovery part, it is suitable for pushing the trigger part to make the positioning part disengage from the locking position. When the positioning part disengages from the locking position, the first reset part is suitable for driving the trolley to move from the second position to the first position.

5. A parts transport system, comprising the automatically returnable trolley as claimed in any one of claims 1 to 3, characterized in that: It also includes a parts input rack and a storage container, wherein the storage container is used to place items to be transported; The second slider has an initial position and a trigger position. When the second slider is located at the trigger position, the blocking member is located at the blocking position. When the second slider is located at the initial position, the blocking member is out of the blocking position. The side of the component input rack close to the trolley is provided with a push portion; when the second slider is located at the initial position, the second slider protrudes relative to the delivery side toward the direction close to the component input rack; when the second slider is located at the trigger position, one side of the second slider abuts against the delivery side, and the other side abuts against the component input rack; The component input frame is provided with a second placement portion, and when the second slider is located at the trigger position, the storage container is suitable for sliding from the first placement portion to the second placement portion.

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