Transport trolley

Abstract

The present invention provides a transport trolley, comprising a mobile body and at least two supporting fixtures. The mobile body can move along a predetermined path. At least two supporting fixtures are arranged on the mobile body at intervals, and the top ends of the supporting fixtures can cooperate with each other to fix the workpiece; the supporting fixture comprises: a support seat, a connecting piece and a positioning device; the support seat is connected to the mobile body; the connecting piece is arranged on the top end of the support seat to be fixedly connected to the workpiece, and the connecting piece can float in a horizontal plane relative to the support seat; the positioning device can fix the connecting piece on the support seat, or release the fixing of the connecting piece to make the connecting piece float. The transport trolley of the present invention eliminates various errors in the previous process, realizes the positioning of the workpiece when connecting the parts, and eliminates the error of workpiece positioning caused by the operation error of the transport trolley before the welding fixture is connected. At the same time, the positioning device can fix the connecting piece and the support seat relatively, ensuring the safe transportation of the workpiece.

Description

Technical Field

[0001] The invention relates to the technical field of storage cargo transportation, and in particular to a semi-trailer workpiece transporting trolley. Background Art

[0002] The semi-trailer body is a steel structure welded from various metal sheet forming parts. In the manufacturing process, the use of AGV (Automated Guided Vehicle) transport carts for connecting and transporting workpieces can greatly improve the safety of workpiece logistics and increase the automation rate of the production process. However, various errors are prone to occur in the workpiece in the previous process, such as assembly errors of workpieces and deformation errors after welding; when the AGV transport cart connects parts, there are often large errors in its positioning with the workpiece, causing stability and safety problems caused by inaccurate connection; at the same time, during the transportation process of the AGV transport cart, the error in positioning the workpiece caused by the driving error causes the problem of difficulty in matching with the welding fixture. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a transport trolley to solve various errors in the previous process before the transport trolley receives the parts, inaccurate positioning of the transport trolley when receiving the parts, and workpiece positioning errors caused by the operation errors of the transport trolley.

[0004] In view of the above technical problems, the present invention proposes a transport trolley, comprising: a moving body and at least two supporting clamps; the moving body can move along a predetermined path; at least two supporting clamps are arranged on the moving body at intervals, and the top ends of each supporting clamp can cooperate with each other to fix the workpiece; the supporting clamp comprises: a supporting seat, a connecting piece and a positioning device; the supporting seat is connected to the moving body; the connecting piece is arranged at the top end of the supporting seat to be fixedly connected to the workpiece, and the connecting piece can float in a horizontal plane relative to the supporting seat; the positioning device can fix the connecting piece on the supporting seat, or release the fixation of the connecting piece so that the connecting piece can float.

[0005] In a preferred embodiment, a plurality of universal balls are embedded in the top end of the support seat; the connecting member can cooperate with the universal balls to float in a horizontal plane.

[0006] In a preferred embodiment, the supporting fixture further comprises: a limiting mechanism, wherein the limiting mechanism is connected to the connecting member and the supporting seat to limit the floating range of the connecting member on the supporting seat.

[0007] In a preferred embodiment, the limiting mechanism includes: a limiting seat and a limiting plate; the limiting seat is fixedly connected to the top of the support seat and forms a through hole with the top surface of the support seat; one end of the limiting plate is connected to the connecting piece, and the other end passes through the through hole and can move within the range of the through hole.

[0008] In a preferred embodiment, the support fixture comprises: two support seats arranged at intervals along the width direction of the mobile body, a connecting member is correspondingly arranged at the top of each of the two support seats, and the two connecting members are fixedly connected by a support plate; a pin hole is arranged on the support plate, and the pin hole is correspondingly located between the two support seats; the positioning device comprises: a driving member and a positioning pin; the driving member is located between the two support seats and is relatively fixed to the two support seats; the positioning pin is arranged corresponding to the pin hole, and can be driven by the driving member to move up and down and extend into the pin hole or withdraw from the pin hole, thereby positioning the support plate or releasing the positioning of the support plate.

[0009] In a preferred embodiment, there are two spaced-apart pin holes on the support plate; there are two positioning pins, one of which is a round pin and the other is a diamond pin, and the top of each positioning pin has a pointed portion; the two positioning pins are connected to the output shaft of the driving member through a push-pull member and can move up and down synchronously; the push-pull member is connected to the driving member.

[0010] In a preferred embodiment, the connecting member is an electromagnet, which fixes the workpiece by magnetic attraction.

[0011] In a preferred embodiment, the supporting fixture further comprises: a mechanical touch switch; the mechanical touch switch is arranged on one side of the electromagnet to detect whether there is a workpiece on the electromagnet.

[0012] In a preferred embodiment, the supporting fixture further comprises: a point laser measurement sensor capable of emitting a laser beam along the width direction of the moving vehicle body; wherein the laser beam emitted by the point laser measurement sensor is higher than the top surface of the electromagnet.

[0013] In a preferred embodiment, at least one of the support fixtures can move along the surface of the mobile vehicle body to approach or move away from other support fixtures, thereby adjusting the spacing between the support fixtures.

[0014] Compared with the prior art, the present invention has the following beneficial effects: the transport trolley of the present invention has a connecting piece of the supporting fixture that can float in the horizontal plane relative to the supporting seat, thereby eliminating various errors in the previous process, realizing the positioning of the workpiece when connecting the parts, and the connecting piece drives the workpiece to adjust its position in the horizontal plane after the parts are delivered so as to facilitate docking with the welding fixture, especially, eliminating the error of workpiece positioning caused by the operation error of the transport trolley before docking with the welding fixture. At the same time, the connecting piece can be relatively fixed to the supporting seat through the positioning device, ensuring the safety of workpiece transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the transport trolley of this embodiment.

[0016] Figure 2 It is a structural schematic diagram of the transport trolley of this embodiment when transporting the frame.

[0017] Figure 3 Schematic diagram of the structure of the support fixture of this embodiment.

[0018] Figure 4 It is a partial structural schematic diagram of the supporting fixture of this embodiment.

[0019] Figure 5 Schematic diagram of the structure of the positioning device of this embodiment.

[0020] The reference numerals in the accompanying drawings are explained as follows: 100, frame; 2, moving body; 21, slide rail; 301, fixing fixture; 302, adjusting fixture; 31, supporting seat; 311, connecting plate; 312, reinforcing plate; 313, connecting plate; 314, universal ball; 315, clamping part; 321, electromagnet; 322, supporting plate; 3221, second pin hole; 323, mechanical touch switch; 331, limit seat; 3311, perforation; 332, limit plate; 34, point laser measurement sensor; 351, motor; 352, push-pull member; 353, positioning pin. DETAILED DESCRIPTION

[0021] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially used for illustration purposes rather than for limiting the present invention.

[0022] See also Figures 1 to 5 The transport vehicle provided in this embodiment mainly refers to an AGV vehicle, which can travel along a specified guide path and is mainly suitable for transporting various vehicle workpieces, especially a frame 100. The transport vehicle includes: a moving vehicle body 2 and at least two supporting fixtures.

[0023] The mobile body 2 can travel along a predetermined path. At least two support fixtures are arranged on the mobile body 2 at intervals, and the top ends of the support fixtures can cooperate with each other to fix the frame 100. The support fixture includes: a support seat 31, a connecting piece and a positioning device. The support seat 31 is connected to the mobile body 2; the connecting piece is arranged at the top end of the support seat 31 to be fixedly connected to the frame 100, and the connecting piece can float in a horizontal plane relative to the support seat 31; the positioning device can fix the connecting piece on the support seat 31, or release the fixing of the connecting piece so that the connecting piece can float.

[0024] The transport trolley of this embodiment has a connecting piece of the supporting fixture that can float in the horizontal plane relative to the supporting seat, so as to realize the positioning of the workpiece when the transport trolley is connected, and after the workpiece is delivered, the connecting piece drives the workpiece to float in the horizontal plane to facilitate docking with the welding fixture; in particular, before docking with the welding fixture, the error of workpiece positioning caused by the operation error of the transport trolley is eliminated. At the same time, the connecting piece and the supporting seat can be relatively fixed by the positioning device, ensuring the safety of workpiece transportation.

[0025] Specifically, this embodiment is described in detail with a transport vehicle frame 100. The mobile vehicle body 2 of this embodiment is a square body structure. Figure 1 , its length direction is defined as x direction, and its width direction is defined as y direction. This is used as a reference when referring to the directions in the x direction and y direction in this article. Among them, a slide rail 21 is provided on the surface of the moving body 2 along its x direction. The front and rear mentioned in this embodiment refer to the front and rear of the moving body 2 in the direction of travel.

[0026] In actual use, the structure of the mobile body 2 is not limited to the square body in this embodiment, and can also be other structures, as long as it has a supporting surface for connecting the supporting clamp.

[0027] In this embodiment, there are two supporting fixtures, one is a fixed fixture 301, and the other is an adjusting fixture 302. The fixed fixture 301 is fixedly connected to the front end of the mobile body 2; the adjusting fixture 302 is located at the rear end of the mobile body 2. The adjusting fixture 302 cooperates with the slide rail 21 and moves along the slide rail 21 to approach or move away from the fixed fixture 301. Furthermore, the adjusting fixture 302 moves along the slide rail 21 through a driving system, and the driving system is driven by a motor to drive the gear rack mechanism to drive the adjusting fixture 302 to slide on the slide rail 21.

[0028] In this embodiment, the spacing between the fixing fixture 301 and the adjusting fixture 302 is adjustable to accommodate workpieces of different sizes, such as straight-back frame vehicles, small gooseneck vehicles, flat-railed vehicles, etc.; in particular, the position of the spring bracket can be avoided when lifting the vehicle frame 100. At the same time, the transport trolley is also suitable for loading and unloading different workpieces, that is, it can be connected in the forward direction or in the reverse direction.

[0029] In other embodiments, the number of the supporting fixtures is not limited to two, but may be more than two; in addition, the supporting fixtures may also be adjusting fixtures 302, which adjust the distance between each other through displacement to cooperate with workpieces of different sizes.

[0030] In this embodiment, the adjustment fixture 302 includes: a support seat 31, an electromagnet 321, a mechanical touch switch 323, a limit mechanism and a positioning device.

[0031] See again Figure 3 and Figure 5 There are two support seats 31, which are spaced apart and stand vertically in the y direction. A connecting plate 311 is fixedly connected to the bottom of the two support seats 31, and the connecting plate 311 is used to support the two support seats 31 and make the two support seats 31 form a relatively fixed whole through the connecting plate 311. The two support seats 31 cooperate with the slide rail 21 through the connecting plate 311. Furthermore, a plurality of reinforcing plates 312 are provided at the position where the connecting plate 311 and the support seats 31 are connected to strengthen the connection strength between the two.

[0032] A connecting plate 313 is fixedly provided on the top of the two support seats 31. The connecting plate 313 is extended along the y direction. The connecting plate 313 is provided with a plurality of universal balls 314 corresponding to the positions of the support seats 31. The universal balls 314 are partially embedded in the upper surface of the connecting plate 313. Further, the connecting plate 313 is connected with two clamping parts 315 along the y direction. The two clamping parts 315 are arranged away from the electromagnet 321, wherein the clamping parts 315 and the upper surface of the connecting plate 313 form a clamping groove. Further, two first pin holes (not shown in the figure) are provided on the connecting plate 313. The two first pin holes are spaced apart along the y direction and are located between the two support seats 31.

[0033] In actual use, the distribution direction of the two first pin holes is not limited, and they only need to be arranged at intervals.

[0034] There are two electromagnets 321 , which are respectively located at the top ends of the two support seats 31 . The electromagnets 321 fix the vehicle frame 100 by magnetic attraction.

[0035] Specifically, two electromagnets 321 are fixedly mounted on a support plate 322, and the two electromagnets 321 are fixedly connected to each other through the support plate 322. The support plate 322 is placed on the connecting plate 313, and the two electromagnets 321 on the support plate 322 are correspondingly located above the two support seats 31. The support plate 322 can cooperate with the universal ball 314 to make the electromagnets 321 relatively displaced with the support seats 31 in the horizontal plane, thereby achieving the floating of the electromagnets 321 in the horizontal plane. Furthermore, the support plate 322 is inserted into the card slot, and the gap between the support plate 322 and the card slot is matched; at the same time, a second pin hole 3221 is provided below the support plate 322 corresponding to the first pin hole.

[0036] The mechanical touch switch 323 is disposed on one side of the electromagnet 321 and is used to detect whether there is a supporting frame 100 on each electromagnet 321 .

[0037] The limiting mechanism is connected with the electromagnet 321 and the support seat 31 to limit the floating range of the electromagnet 321 on the support seat 31. Specifically, the limiting mechanism includes: a limiting seat 331 and a limiting plate 332, wherein the limiting plate 332 is a bent plate.

[0038] The limit seat 331 is fixedly connected to the two ends of the connecting plate 313 in the length direction. Each limit seat 331 is connected to the connecting plate 313 and encloses a through hole 3311; wherein, there is a gap between the limit seat 331 and the end of the supporting plate 322 in the length direction. One end of the limit plate 332 is connected to the end of the supporting plate 322 in the length direction, and the other end is bent through the through hole 3311 of the limit seat 331. When the supporting plate 322 cooperates with the universal ball 314 and moves, the limit plate 332 is driven to move at the same time. The limit seat 331 can limit the movement of the limit plate 332 within the range of the through hole 3311, thereby limiting the floating range of the supporting plate 322 in the horizontal plane.

[0039] In this embodiment, the support plate 322 drives the two electromagnets 321 to float and adjust along the x-direction and the y-direction, and can also float and adjust at an angle with the x-direction and the y-direction in the horizontal plane. The mutual cooperation between the limit seat 331, the limit plate 332 and the clamping part 315 can limit the floating range of the support plate 322.

[0040] Preferably, the limit plate 332 is bent upward, and two point laser measurement sensors 34 are installed on the upper end of the upper end. The two point laser measurement sensors 34 are distributed along the x direction, and each point laser measurement sensor 34 can emit a laser beam along the y direction. If the light spot hits the surface of the obstacle within the specified range, part of the scattered light returns to the sensor receiver, and the system senses the existence of the obstacle and issues an alarm to ensure the accuracy of the transport trolley receiving the parts. The two point laser measurement sensors 34 are connected to the upper end of the limit plate 332 that is bent upward through a long plate; at the same time, in order to ensure the accuracy of the measurement, the laser beam emitted by each point laser measurement sensor 34 is higher than the top surface of the electromagnet 321.

[0041] In actual use, the number of point laser measurement sensors 34 installed on the top of each support seat 31 is not limited to two in the present embodiment; the point laser measurement sensor 34 can also be installed at a position higher than the top surface of the electromagnet 321 through other components, and it is convenient to emit a laser beam along the x direction and toward the frame 100.

[0042] In other embodiments, the limiting plate 332 may also be a straight plate structure, in which case the point laser distance measuring device may be omitted.

[0043] The positioning device includes: a motor 351 , a push-pull member 352 and two spaced positioning pins 353 .

[0044] The motor 351 is located below the support plate 322 and the connecting plate 313, and the motor 351 is fixedly mounted on the connecting plate 311 between the two support seats 31, so that the motor 351 is fixedly connected to the two support seats 31. The lower end of the push-pull member 352 is connected to the output shaft of the motor 351, and the upper end thereof is connected to the positioning pin 353. The positioning pin 353 is arranged corresponding to the first pin hole and the second pin hole 3221 in the vertical direction; further, the positioning pin 353 is two, one is a round pin, and the other is a diamond pin, both of which have a tip at the top, and the cooperation of the round pin and the diamond pin prevents over-positioning in the length direction of the support plate 322 and the connecting plate 313.

[0045] The motor 351 can drive the push-pull member 352 to move up and down, so that the push-pull member 352 drives the two positioning pins 353 to synchronously extend into the second pin hole 3221 and the first pin hole fixed support plate 322, thereby positioning the two electromagnets 321 relative to the support seat 31; or, the push-pull member 352 drives the two positioning pins 353 to synchronously withdraw from the first pin hole and the second pin hole 3221, thereby releasing the positioning of the two electromagnets 321 relative to the support seat 31.

[0046] In actual use, the motor 351 may also be driven by other components, which are not limited here.

[0047] In other embodiments, the number of the second pin hole 3221 and the first pin hole can be one or more, and the positioning pins 353 are adapted to the number.

[0048] The structures of the fixing clamp 301 and the adjusting clamp 302 are roughly the same, except that, in the fixing clamp 301, the connecting plate 311 fixedly connected at the bottom of the two supporting seats 31 is fixedly connected to the upper surface of the mobile body 2, so the specific structure of the fixing clamp 301 is not repeated.

[0049] In other embodiments, the number of the support seats 31 of each support fixture is not limited to two but may be more than two, and the distribution direction of the support seats 31 is not limited to along the y direction.

[0050] The working principle of the transport trolley of this embodiment is as follows: during the connection process, the connector floats in the horizontal plane relative to the support seat 31 to ensure the accuracy of the connector when connecting; after the connection, the connector is fixed relative to the support seat 31 for transportation by the positioning device to ensure the safety of the transportation process; after that, after being transported to the welding process, the trolley stops, the positioning of the connector by the positioning device is released, and the connector is floated in the horizontal plane again to reduce the positioning error of the workpiece caused by the operation error of the transport trolley and improve the docking accuracy with the welding tooling. At the same time, the transport trolley also effectively eliminates various errors in the previous process, such as the assembly error of the workpiece, the deformation error of the post-welding forming, etc., that is, the floating of all the errors superimposed in the effective horizontal plane eliminates them. It can be seen that the positioning device can not only ensure that the transport trolley delivers the workpiece to the welding fixture within the effective clamping range, but also effectively eliminate the error of the previous process of the workpiece and the error caused by the transportation process of the transport trolley.

[0051] Furthermore, in the process of connecting parts, first, the position of the electromagnet 321 is adjusted by the cooperation between the support plate 322 and the universal ball 314; then, the motor 351 drives the push-pull member 352 to raise the positioning pin 353, and then the frame 100 is connected after the electromagnet 321 is positioned by the positioning device to avoid the floating state that may occur when the electromagnet 321 is connected. After the frame 100 is transported to the welding station by the transport trolley and before loading, in order to eliminate the error in the operation of the transport trolley, the positioning pin 353 is lowered to release the positioning of the electromagnet 321 by the positioning device; then, the electromagnet 321 contacts the universal ball 314 through the support plate 322, and the electromagnet 321 adsorbs the frame 100 and can slide in the horizontal plane relative to the universal ball 314 and the support seat 31 to fine-tune the position of the electromagnet 321, thereby eliminating the positioning error of the frame 100 caused by the operation error of the transport trolley, ensuring the automatic cooperation between the transport trolley and the welding fixture after transportation, realizing automatic transportation, loading, tightening and welding of the frame 100, and improving the overall safety and automation rate.

[0052] Furthermore, after the electromagnet 321 is energized, the magnetic force generated by it can adsorb the upper frame 100, thereby ensuring the stability and safety of the frame 100 during transportation.

[0053] Furthermore, since the mechanical touch switch 323 and the point laser measurement sensor 34 are integrated on the supporting fixture, during the receiving process, it is possible to detect whether the frame 100 before being transported by the transport trolley has been inspected and the effectiveness of the receiving is inspected, thereby ensuring the continuous operation of the production line.

[0054] Furthermore, for the frame 100 of different models, the position of the movable adjustment fixture 302 is moved close to or away from the fixed fixture 301 to adapt to various loading and unloading postures of various vehicle series, especially when forward connection is made, the installation position of the spring bracket on the frame 100 can be avoided to avoid damage to the spring bracket during transportation.

[0055] The transport trolley of this embodiment changes the traditional logistics mode of workpiece transfer and has strong adaptability to the types of workpieces received; in addition, it improves the safety of workpiece logistics, avoids the situation where human resources are occupied during workpiece transfer, and improves the automation rate of the production process.

[0056] Although the present invention has been described with reference to the above typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present invention can be implemented in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims, so all changes and modifications falling within the claims or their equivalents should be covered by the appended claims.

Claims

1. A transport trolley, characterized in that: include: The mobile vehicle can move along a predetermined path; At least two support clamps are arranged on the mobile body at intervals, and the top ends of each support clamp can cooperate with each other to fix the workpiece; the support clamp comprises: two support seats, two connecting members and a positioning device are arranged at intervals along the width direction of the mobile body; the support seat is connected to the mobile body; one connecting member is correspondingly arranged on the top of each of the two support seats, and the two connecting members are fixedly connected by a support plate to be fixedly connected to the workpiece; a pin hole is arranged on the support plate, and the pin hole is correspondingly located between the two support seats; a plurality of a universal ball; the connecting member can cooperate with the universal ball and float in the horizontal plane; the positioning device can fix the connecting member on the support seat, or release the fixation of the connecting member to allow the connecting member to float; the positioning device includes: a driving member and a positioning pin; the driving member is located between the two support seats and is relatively fixed to the two support seats; the positioning pin is arranged corresponding to the pin hole, and can be driven by the driving member to move up and down and extend into the pin hole or withdraw from the pin hole, so as to position the support plate or release the positioning of the support plate; The support fixture further comprises: a limiting mechanism, which is connected to the connecting member and the supporting seat to limit the floating range of the connecting member on the supporting seat; the limiting mechanism comprises: a limiting seat and a limiting plate; The limiting seat is fixedly connected to the top of the supporting seat and forms a through hole with the top surface of the supporting seat; one end of the limiting plate is connected to the connecting piece, and the other end passes through the through hole and can move within the range of the through hole.

2. The transport vehicle according to claim 1, characterized in that: The support plate has two spaced-apart pin holes; the positioning pins are adaptively provided with two, one of which is a round pin and the other is a diamond pin, and the top end of each positioning pin has a pointed portion; The two positioning pins are connected to the output shaft of the driving member through a push-pull member and can move up and down synchronously; the push-pull member is connected to the driving member.

3. The transport vehicle according to claim 1, characterized in that: The connecting member is an electromagnet, which fixes the workpiece by magnetic attraction.

4. The transport trolley according to claim 3, characterized in that: The supporting fixture further comprises: a mechanical touch switch; the mechanical touch switch is arranged on one side of the electromagnet to detect whether there is a workpiece on the electromagnet.

5. The transport trolley according to claim 3, characterized in that: The supporting fixture further includes: a point laser measurement sensor capable of emitting a laser beam along the width direction of the moving vehicle body; wherein the laser beam emitted by the point laser measurement sensor is higher than the top surface of the electromagnet.

6. The transport trolley according to claim 1, characterized in that: At least one of the support fixtures can move along the surface of the mobile vehicle body to approach or move away from the other support fixtures, thereby adjusting the distance between the two support fixtures.

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