Ground chain power and free front trolley and ground chain power and free conveying system

Abstract

The invention relates to a ground chain power and free trolley and a ground chain power and free conveying system, which are designed for transferring workpieces on the ground in a power and free manner, and comprise a track frame mounted on the ground, a conveying track mounted on the track frame, a plurality of front trolleys running on the conveying track and a traction chain, a jig used for fixing a workpiece to be machined is installed above the front trolley, and the traction chain is located below the front trolley. The front trolley comprises a jig trolley and a traction trolley fixedly connected to the lower portion of the jig trolley, and the traction trolley comprises a traction trolley frame fixedly connected to the lower portion of the jig trolley frame, a lifting claw and an escape stopping claw, wherein the lifting claw and the escape stopping claw are rotatably connected to the traction trolley frame.

Description

Technical Field

[0001] The present application relates to the technical field of accumulation chain conveying, and in particular to a ground chain accumulation front trolley and a ground chain accumulation conveying system. Background Art

[0002] The accumulation chain conveyor system is an efficient and flexible material conveying equipment, which is widely used in industrial production, especially in the spraying, automobile manufacturing, home appliances and other industries. The system uses the chain as a traction component to achieve quantitative material transportation and has an accumulation function, that is, the stopper blocks the carrier at the required position, so that the carrier and the drive chain are disengaged, thereby stopping the conveying and performing temporary storage or process operations on the materials.

[0003] The existing accumulation chain conveyor system is set up at a high place in the production workshop through a rail frame. The workpiece is suspended on the hanger of the accumulation trolley through the loading device. The accumulation trolley is under the traction chain and is lifted or lowered by the lifting claw on the front trolley to achieve transmission or disconnection with the push head on the traction chain. However, for some workpieces that are not convenient to hang or want to be transported on the ground, the traditional hanging accumulation chain cannot meet the use requirements. Therefore, this application aims to propose an accumulation chain conveyor system suitable for ground transportation.

[0004] In addition, the applicant needs to point out that traditional ground conveying systems usually use straight tracks or roller lines for translational conveying, and must use steering mechanisms to turn and change lines at the turns of the assembly line. At the same time, traditional ground conveying systems cannot achieve parts accumulation. Summary of the invention

[0005] The purpose of the present application is to overcome the deficiencies in the prior art and to propose a ground chain accumulation and delivery system and a ground chain accumulation and delivery front trolley suitable for ground chains.

[0006] In order to achieve the above objectives, this application adopts the following technical solutions: The present application provides a ground chain accumulation front trolley, comprising a jig trolley and a traction trolley fixedly connected below the jig trolley, the jig trolley comprising a jig frame for fixedly installing a jig, a plurality of walking wheels rotatably arranged on the jig frame around a horizontal axis, and a plurality of guide wheels rotatably arranged on the jig frame around a vertical axis, the traction trolley comprising a traction frame fixedly connected below the jig frame, a lifting claw and a stop claw rotatably connected to the traction frame.

[0007] In a possible implementation, the lifting claw and the anti-escape claw rotate around a pair of parallel horizontal axis lines respectively, the lifting claw is located at the front side of the anti-escape claw, and the center of gravity of the lifting claw is located at the rear end.

[0008] In a possible implementation, the rear end of the lifting claw has a first protrusion extending backward, and the front end of the anti-escape claw has a second protrusion extending forward, and the second protrusion is located above the first protrusion.

[0009] In a possible implementation, the jig frame includes a horizontally arranged mounting plate, and the plurality of walking wheels and the plurality of guide wheels are symmetrically mounted on both sides of the mounting plate, and the mounting plate is provided with a plurality of mounting holes for connecting the jig and / or the traction frame.

[0010] In a possible implementation, the traction frame includes a pair of L-shaped frame plates, the upper ends of the frame plates are fixedly connected to the mounting plates, and the lifting claws and the stop claws are rotatably mounted between the pair of frame plates.

[0011] In a possible implementation, the jig frame is also connected to a two-dimensional code plate for displaying a trolley identification code. The two-dimensional code plate is made of metal material and has a two-dimensional identification code engraved on its surface.

[0012] Another technical solution proposed in the present application is: a ground chain accumulating and conveying system, comprising a track frame installed on the ground, a conveying track installed on the track frame, a plurality of accumulating and conveying trolley groups running on the conveying track and a traction chain, each accumulating and conveying trolley group comprises the ground chain accumulating front trolley, the conveying track comprises a plurality of brackets installed on the track frame, the upper side of the brackets is open, a driving track is installed on the upper part of the brackets, a traction track is opened on the lower part, and the traction chain is located in the traction track.

[0013] In a possible implementation, the width of the walking track is greater than or equal to three times the width of the traction track.

[0014] In a possible implementation, a gap is formed at the lower portion of the traction track.

[0015] In a possible implementation, a fixture for fixing the workpiece to be processed is installed above the front trolley, and the traction chain is located below the front trolley. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A plan view of an assembly line using a ground chain accumulation and release conveying system provided in an embodiment of the present application.

[0017] Figure 2 A cross-sectional schematic diagram of a ground chain accumulation and conveying system provided in an embodiment of the present application.

[0018] Figure 3A schematic diagram of a front trolley and a traction chain transmission provided in an embodiment of the present application (release state).

[0019] Figure 4 A schematic diagram of an embodiment of the present application showing a front trolley being disengaged from a traction chain (accumulation state).

[0020] Figure 5 A schematic diagram of a track bracket provided in an embodiment of the present application.

[0021] Figure 6 A front view of a front trolley provided in an embodiment of the present application.

[0022] Figure 7 A top view of a front trolley provided in an embodiment of the present application.

[0023] Figure 8 A side view of a front trolley provided in an embodiment of the present application.

[0024] Among them: 100, conveying track; 110, traction chain; 111, push head; 120, driving track; 130, traction track; 131, gap; 140, bracket; 150, stopper; 200, front trolley; 210, fixture trolley; 211, fixture frame; 2111, mounting plate; 212, walking wheel; 213, guide wheel; 215, mounting hole; 221, signal sensor board; 222, QR code board; 250, traction trolley; 251, lifting claw; 2511, first convex part; 252, stop claw; 2521, second convex part; 253, traction frame; 2531, frame plate; 254, auxiliary guide wheel; 300. Fixture; 400. Track rack. DETAILED DESCRIPTION

[0025] To describe the technical content, structural features, achieved purpose and effect of the invention in detail, the technical scheme in the embodiment of the present application will be described below in conjunction with the drawings in the embodiment of the present application. Obviously, the described embodiment is only a part of the embodiment of the present application, rather than all the embodiments. In the following description, for the purpose of explanation, many specific details are set forth to provide a detailed description of various exemplary embodiments or implementations of the invention. However, various exemplary embodiments may also be implemented without these specific details or in the case of one or more equivalent arrangements. In addition, various exemplary embodiments may be different, but not necessarily exclusive. For example, without departing from the inventive concept, the specific shape, structure and characteristics of the exemplary embodiment may be used or implemented in another exemplary embodiment.

[0026] In the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0027] In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0028] The positional relationships of "upper" and "lower" described in this specification correspond to the attached Figure 2 The upper and lower position relationship in Figure 3 The middle arrow indicates the direction of travel of the drive chain and the front trolley. Figure 3 The left side in the middle is the "front" direction described in the manual. Figure 3 The right side direction in the figure is the “rear” direction described in the specification.

[0029] The present application is a front trolley and an accumulation and delivery system designed for stacking and transporting workpieces on the ground. Figure 1 The present invention provides a plan view of a ground chain accumulating and conveying system applied to a motor housing surface treatment assembly line in one embodiment of the present application. The ground chain accumulating and conveying system comprises a conveying track 100, a plurality of accumulating and conveying trolley groups running along the conveying track 100, and a traction chain 110 providing power for the accumulating and conveying trolley groups. Each accumulating and conveying trolley group comprises a front trolley 200, and optionally some accumulating and conveying trolley groups further comprise medium and small trolleys and a rear trolley. The structures of the medium and small trolleys and the rear trolley are similar to those of the front trolley. The medium and small trolleys and the rear trolley are not provided with lifting claws and stop claws, and a tail shovel is provided on the rear side of the rear trolley. The conveying track 100 sequentially passes through a plurality of workstations of the assembly line, and the traction chain 110 drives the accumulating and conveying trolley group to run along the assembly line. The specific structure of the front trolley 200 is also provided in one embodiment of the present application, and the present invention is described below with reference to the front trolley in combination with the accompanying drawings.

[0030] See also Figure 2 As shown in FIG. 1 , the ground chain accumulation conveying system comprises a track frame 400 installed on the ground, a conveying track 100 installed on the track frame 400 , a plurality of front trolleys 200 running on the conveying track 100 , and a traction chain 110 . Figure 2 , 5As shown, the conveying track 100 includes a plurality of brackets 140 installed on a track frame 400 . The upper side of the brackets 140 is open. A driving track 120 is installed on the upper part of the brackets 140 . A traction track 130 is opened on the lower part. The traction chain 110 is located in the traction track 130 .

[0031] A fixture 300 for fixing the workpiece to be processed is installed above the front trolley 200, and the traction chain 110 is located below the front trolley 200. When the lifting claw 251 of the front trolley 200 falls, it contacts the pusher head of the traction chain 110, thereby realizing transmission. The specific form of the fixture 300 is not specified in this application, and the engineer can design it according to the specific shape of the workpiece to be fixed.

[0032] from Figure 2 It can be seen that the main weight of the front trolley 200 is transferred from the upper running wheels 212 to the running tracks 120 on both sides, and the lower part of the front trolley 200 is mainly used to cooperate with the traction chain to complete the transmission. In order to stabilize the center of gravity of the front trolley 200 and prevent tipping or derailment, the width of the running track 120 of the present invention is greater than the width of the conventional suspended accumulation chain running track. In this embodiment, the width of the running track 120 is greater than or equal to three times the width of the traction track 130. Specifically, the width of the running track 120 is greater than or equal to 200 mm.

[0033] In addition, the present invention adopts ground chain transmission, and the workpiece to be processed is placed on the front trolley through the fixture 300, and the traction track 130 is located below. In order to prevent the parts above from falling and getting stuck in the traction chain 110, the present application provides a notch 131 at the bottom of the traction track 130, and the notch 131 is located at the center of the bottom of the traction track 130, that is, the traction track 130 is a track open on the upper and lower sides, so that the parts can fall from the notch 131 to the ground to avoid getting stuck in the traction chain 110.

[0034] See also Figure 3 , 4 The front trolley 200 includes a fixture trolley 210 and a traction trolley 250 fixedly connected to the bottom of the fixture trolley 210. When the front trolley 200 runs on the conveying track 100, the fixture trolley 210 of the front trolley 200 runs in the upper driving track 120, and the traction chain 110 runs in the traction track 130. The multiple push heads 111 on the traction chain 110 protrude upward, and the traction trolley 250 below has a lifting claw 251 and a stop claw 252. When the lifting claw 251 descends, it contacts the push head 111 below and is driven by the traction chain 110 to move forward. At this time, the front trolley 200 is in Figure 3When the trolley needs to be stored, the stopper 150 installed on the side of the track extends and blocks the path of the front trolley, so that the lifting claw 251 of the front trolley 200 is lifted, and the lifting claw 251 drives the stop claw 252 to lift at the same time, so that the lifting claw 251 is out of contact with the push head 111, so that the front trolley 200 stops and turns into Figure 4 The storage status shown.

[0035] See also Figure 6 , 7 As shown in , 8, the jig trolley 210 of the present application includes a jig frame 211 for fixing and installing the jig 300, a plurality of running wheels 212 rotatably arranged on the jig frame 211 around a horizontal axis, and a plurality of guide wheels 213 rotatably arranged on the jig frame 211 around a vertical axis. The jig frame 211 includes a horizontally arranged mounting plate 2111, and a plurality of running wheels 212 and a plurality of guide wheels 213 are symmetrically mounted in pairs on the left and right sides of the mounting plate 2111. The wheel diameter of the running wheel 212 is larger than the wheel diameter of the guide wheel 213, and the running wheel 212 is in rolling friction contact with the bottom surface of the vehicle track 120, while the guide wheel 213 is in rolling friction contact with the inner side surface of the vehicle track 120. A plurality of mounting holes 215 are provided on the mounting plate 2111, and these mounting holes 215 can be used to connect the jig 300, or the traction frame 253, or both can be installed at the same time. In other embodiments of the present application, the jig trolley 210 may be adapted to the jig 300 by providing other connection structures, and engineers may design them according to actual needs, which will not be described in detail here.

[0036] The traction trolley 250 includes a traction frame 253 fixedly connected to the lower portion of the fixture frame 211, a lifting claw 251 and a stop claw 252 rotatably connected to the traction frame 253. The traction frame 253 includes a pair of L-shaped frame plates 2531, the upper end of the frame plate 2531 is fixedly connected to the mounting plate 2111, and the lifting claw 251 and the stop claw 252 are rotatably mounted between the pair of frame plates 2531.

[0037] The lifting claw 251 and the stop claw 252 rotate around a pair of parallel horizontal axis lines respectively. The lifting claw 251 is located at the front side of the stop claw 252, and the rotation axis of the lifting claw 251 is located at the center front of the lifting claw, so that the center of gravity of the lifting claw 251 is located at the rear end. In some embodiments, a counterweight can also be set at the rear end of the lifting claw 251. In the free state, the rear end of the lifting claw 251 is in a lower falling position, and when the front end of the lifting claw 251 is pressed, the rear end is lifted and in a lifting state. In the conveying system, a stopper 150 is installed on the side of the track, and its action is controlled by a PLC control system. When the stopper 150 is extended, the front end of the lifting claw 251 is pressed, so that the rear end of the lifting claw 251 is lifted and separated from the push head 111 below, and the car stops. When the stopper 150 is retracted, the rear end of the lifting claw 251 falls naturally and contacts and transmits with the push head 111 at the rear.

[0038] Furthermore, the rear end of the lifting claw 251 has a first protrusion 2511 extending backward, and the front end of the stop claw 252 has a second protrusion 2521 extending forward. The second protrusion 2521 is located above the first protrusion 2511. When the rear end of the lifting claw 251 is lifted upward, the first protrusion 2511 lifts the second protrusion 2521.

[0039] In addition, the jig frame 211 of the present application is also connected with a two-dimensional code board 222 for displaying the trolley identification code. The two-dimensional code board 222 is made of metal material, and the surface is hollowed out and engraved with a two-dimensional identification code. The two-dimensional code board 222 can record the workpiece identification code, processing parameters and other information carried by the front trolley 200. Since the two-dimensional code board 222 is made of metal material, it can be used in high-temperature environments such as high-temperature furnaces and curing furnaces, avoiding the high cost and short life of electronic radio frequency chips.

[0040] In addition to the above-mentioned structure, the ground chain accumulation and conveying system of the present application also includes a driving device for providing power for the traction chain, a tension adjustment device for adjusting the tension of the traction chain, and a switch structure arranged between multiple tracks, etc. These structures can be improved and designed according to the structure of the suspended accumulation chain, and will not be described in detail in this application.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and the scope of protection of the present invention is defined by the attached claims, description and their equivalents.

Claims

1. A ground chain front trolley, characterized in that: The invention comprises a jig trolley (210) and a traction trolley (250) fixedly connected below the jig trolley (210); the jig trolley (210) comprises a jig frame (211) for fixedly mounting a jig (300), a plurality of walking wheels (212) rotatably arranged on the jig frame (211) around a horizontal axis, and a plurality of guide wheels (213) rotatably arranged on the jig frame (211) around a vertical axis; the traction trolley (250) comprises a traction frame (253) fixedly connected below the jig frame (211), a lifting claw (251) and a stop claw (252) rotatably connected to the traction frame (253).

2. The ground chain front trolley according to claim 1, characterized in that: The lifting claw (251) and the stopping claw (252) rotate around a pair of parallel horizontal axis lines respectively; the lifting claw (251) is located in front of the stopping claw (252), and the center of gravity of the lifting claw (251) is located at the rear end.

3. The ground chain front trolley according to claim 2, characterized in that: The rear end of the lifting claw (251) has a first convex portion (2511) extending backwards, and the front end of the anti-escape claw (252) has a second convex portion (2521) extending forwards, and the second convex portion (2521) is located above the first convex portion (2511).

4. The ground chain front trolley according to claim 1, characterized in that: The jig frame (211) comprises a horizontally arranged mounting plate (2111), a plurality of walking wheels (212) and a plurality of guide wheels (213) are symmetrically mounted on two sides of the mounting plate (2111), and a plurality of mounting holes (215) for connecting the jig (300) and / or the traction frame (253) are provided on the mounting plate (2111).

5. The ground chain front trolley according to claim 4, characterized in that: The traction frame (253) comprises a pair of L-shaped frame plates (2531), the upper ends of the frame plates (2531) are fixedly connected to the mounting plate (2111), and the lifting claws (251) and the stop claws (252) are rotatably mounted between the pair of frame plates (2531).

6. The ground chain front trolley according to claim 1, characterized in that: The jig frame (211) is also connected to a two-dimensional code plate (222) for displaying a trolley identification code; the two-dimensional code plate (222) is made of a metal material and has a two-dimensional identification code engraved on its surface.

7. A ground chain accumulation and release conveying system, characterized in that: It comprises a track frame (400) installed on the ground, a conveying track (100) installed on the track frame (400), a plurality of accumulating trolley groups running on the conveying track (100), and a traction chain (110), each accumulating trolley group comprises a ground chain accumulating front trolley as described in any one of claims 1 to 6, the conveying track (100) comprises a plurality of brackets (140) installed on the track frame (400), the upper side of the bracket (140) is open, a driving track (120) is installed on the upper part of the bracket (140), and a traction track (130) is opened on the lower part, and the traction chain (110) is located in the traction track (130).

8. The conveying system according to claim 7, characterized in that The width of the walking track (120) is greater than or equal to three times the width of the traction track (130).

9. The conveying system according to claim 7, characterized in that: A notch (131) is provided at the lower portion of the traction track (130).

10. The conveying system according to claim 7, characterized in that A fixture (300) for fixing a workpiece to be processed is installed above the front trolley (200), and the traction chain (110) is located below the front trolley (200).

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