PBS transfer system for medium and long pickup trucks

Abstract

The invention discloses a medium-long pickup truck PBS transfer system, including a coating line composed of a coating trolley and a coating side lifter; a general assembly line composed of a general assembly trolley, a general assembly front side lifter and a general assembly rear side lifter; a three-fork arm body transfer mechanism is used to transfer the front and rear bodies of the medium-long pickup truck from the coating line to the general assembly line in sequence; the coating trolley is used to transport the front and rear bodies of the medium-long pickup truck to the corresponding positions of the coating side lifter respectively, and the coating side lifter is used to lift the front and rear bodies of the medium-long pickup truck; the general assembly front side lifter is used to lift the front body of the medium-long pickup truck and place it on the general assembly trolley, and the general assembly rear side lifter is used to lift the rear body of the medium-long pickup truck and place it on the general assembly trolley. The advantages of the invention are that a compact coating production line can be realized for the production of medium-long pickup trucks; a three-fork arm structure is used to realize the transfer from the coating line to the general assembly line, thereby reducing costs; and without affecting the JPH of the general assembly line, the number of general assembly trolleys used is reduced, thereby reducing the requirements for the production line.

Description

Technical Field

[0001] The invention relates to a PBS transfer system for a medium-long pickup truck. Background Art

[0002] In recent years, the domestic market demand for pickup trucks has grown rapidly, and the requirements for pickup truck diversity have become increasingly higher. Among them, medium-long box pickup trucks are an important part of the pickup truck market segment. However, for compact painting lines, because the total length of medium-long pickup trucks exceeds the maximum length of the painting trolley, the front and rear bodies of the pickup trucks cannot pass through the painting line on one painting trolley. One solution is split painting of medium-long pickup trucks, that is, the front and rear bodies of the pickup trucks in the painting workshop are respectively mounted on two trolleys and pass the line continuously, but split painting will cause a loss of JPH (JPH is the hourly workload or unit time workload) in the workshop. Usually, PBS transfer forks use four forks, the front body is transferred by two forks, and the rear body is transferred by the other two forks. The traditional four-fork transfer solution is costly. Summary of the invention

[0003] The present invention aims to provide a PBS transfer system for a medium-long pickup truck.

[0004] To achieve the above purpose, the present invention can adopt the following technical solutions:

[0005] The medium-length pickup truck PBS transfer system of the present invention comprises:

[0006] A coating line, the coating line having a coating trolley and a coating side top machine;

[0007] A general assembly line, the general assembly line having a general assembly trolley, a general assembly front top machine and a general assembly rear top machine;

[0008] A three-fork arm body transfer mechanism, which is used to transfer the front body of a medium-length pickup truck and the rear body of a medium-length pickup truck from the coating line to corresponding positions of the general assembly line in sequence;

[0009] Among them, the painting trolley is used to transport the front body and the rear body of the medium-long pickup truck to the corresponding positions of the painting side lifting machine respectively, and the painting side lifting machine is used to lift the front body or the rear body of the medium-long pickup truck; the front side lifting machine of the general assembly is used to lift the front body of the medium-long pickup truck transported by the three-forked arm body transfer mechanism and place it on the general assembly trolley, and the rear side lifting machine of the general assembly is used to lift the rear body of the medium-long pickup truck transported by the three-forked arm body transfer mechanism and place it on the general assembly trolley.

[0010] Preferably, the front assembly top machine comprises a first assembly frame, a first assembly drive motor, a first assembly transmission shaft and two first assembly support brackets arranged at intervals, so as not to affect the three-fork arm car body transfer mechanism from transporting the car body to the assembly line; wherein, the first assembly drive motor is fixedly mounted on the first assembly frame, the first assembly transmission shaft is connected to the first assembly drive motor, so as to realize the synchronous movement of the first assembly support bracket on the same side, and realize the synchronous movement of the first assembly support bracket on the other side through the first assembly transmission chain, thereby realizing the synchronous lifting of the two first assembly support brackets on both sides of the front assembly top machine; a plurality of first assembly support columns are arranged on the first assembly support bracket according to different car bodies for supporting the car body;

[0011] The final assembly rear top machine of the final assembly line comprises a final assembly second frame, a final assembly second drive motor, a final assembly second transmission shaft and two final assembly second support brackets arranged at intervals; the final assembly second drive motor is fixedly mounted on the final assembly second frame, the final assembly second transmission shaft is connected to the final assembly second drive motor, so as to realize the synchronous movement of the final assembly second support bracket on the same side, and realize the synchronous movement of the final assembly second support bracket on the other side through the final assembly second transmission chain, thereby realizing the synchronous lifting and lowering of the two final assembly second support brackets on both sides of the final assembly rear top machine; a plurality of final assembly second support columns are arranged on the final assembly second support bracket according to different car bodies for supporting the car body;

[0012] The inner width of the front assembly top machine and the rear assembly top machine is greater than the outer width of the assembly trolley. The working height of the front assembly top machine and the rear assembly top machine is lower than the height of the assembly trolley, which does not affect the movement of the assembly trolley carrying medium and long pickup trucks. The two first assembly support brackets and the two second assembly support brackets are designed to be spaced apart to avoid interfering with the three-fork arm body transfer mechanism in transporting the body to the assembly line.

[0013] Preferably, the painting side top machine includes a painting frame, a painting drive motor, a painting transmission shaft, a painting mobile load-bearing frame and four painting support brackets arranged at intervals, so as not to affect the three-fork arm vehicle body transfer mechanism to carry the vehicle body from the painting line; wherein, the painting drive motor is fixedly mounted on the painting frame, the painting transmission shaft is connected to the painting drive motor, and the painting transmission shaft drives the painting mobile load-bearing frame to move up and down through a chain transmission, and the four painting support brackets are arranged on the painting mobile load-bearing frame to realize synchronous movement of the painting support brackets on the same side, and synchronous movement of the painting support brackets on the other side is realized through transmission chain transmission, thereby realizing synchronous lifting and lowering of the four painting support brackets on both sides of the painting side top machine; a plurality of painting support columns are arranged on the painting support bracket according to different vehicle bodies for supporting the vehicle body.

[0014] Preferably, the three-fork arm vehicle body transfer mechanism includes

[0015] A mounting base, a fork arm driving motor, a connecting rod, a first fork arm, a second fork arm and a third fork arm; the first fork arm, the second fork arm and the third fork arm are fixedly installed on the mounting base at intervals, and the intervals between them meet the requirements of transferring the front body of a medium-length pickup truck and the rear body of a medium-length pickup truck; the first fork arm, the second fork arm and the third fork arm are fixedly connected by the connecting rod, and each of the connecting rods is respectively provided with a transmission shaft, so that the first fork arm, the second fork arm and the third fork arm move synchronously; the transmission shaft is connected to the fork arm driving motor, and the fork arm driving motor is fixed on the mounting base;

[0016] The distance between the first fork and the second fork matches the length of the front body of a medium-length pickup truck, and is used to carry the front body of a medium-length pickup truck; the distance between the second fork and the third fork matches the length of the rear body of a medium-length pickup truck, and is used to carry the rear body of a medium-length pickup truck.

[0017] Preferably, the first fork arm, the second fork arm and the third fork arm have the same structure, and the structure of the first fork arm / the second fork arm / the third fork arm includes

[0018] A slide rail base, a slide table and a plurality of support columns, wherein the slide rail base is fixedly connected to the mounting base, and the slide rail base and the slide table cooperate to form a mechanism for sliding back and forth to realize the telescopic movement of the slide table; a fixed platform is arranged on the slide table, and a plurality of support columns are arranged at corresponding positions on the fixed platform for supporting the vehicle body to be transferred.

[0019] The advantages of the present invention are that a compact painting production line can be realized for the production of medium and long pickup trucks; the requirement on the length of the painting line trolley is reduced; a three-fork arm structure is used to realize the transfer from the painting line to the final assembly line, saving materials and reducing costs; and the number of final assembly trolleys used is reduced without affecting the JPH of the final assembly line, thereby reducing the requirement on the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall arrangement of the present invention.

[0021] Figure 2 It is a structural schematic diagram of the front side top machine of the general assembly of the present invention.

[0022] Figure 3 yes Figure 2 Right view of .

[0023] Figure 4 yes Figure 2 Top view of the .

[0024] Figure 5 yes Figure 3 A magnified schematic diagram of part A in FIG.

[0025] Figure 6It is a structural schematic diagram of the rear top machine of the general assembly of the present invention.

[0026] Figure 7 yes Figure 6 Right view of .

[0027] Figure 8 yes Figure 6 Top view of the .

[0028] Fig. 9 yes Figure 7 Enlarged schematic diagram of part B in the middle.

[0029] Fig.10 It is a structural schematic diagram of the coating side top machine of the present invention.

[0030] Fig.11 It is a structural schematic diagram of the three-fork arm vehicle body transfer mechanism of the present invention.

[0031] Fig.12 yes Fig.11 Top view of the .

[0032] Fig.13 yes Fig.11 A magnified schematic diagram of part A in FIG. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, in the present invention, the descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0037] In addition, the meaning of "and / or" appearing in the full text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0038] like Figure 1 As shown, the medium-length pickup truck PBS transfer system of the present invention comprises:

[0039] The coating line 1 has a coating trolley 11 and a coating side top machine 12;

[0040] The final assembly line 3 has a final assembly trolley 31, a final assembly front top machine 32 and a final assembly rear top machine 33;

[0041] The three-fork arm vehicle body transfer mechanism 2 is used to sequentially transfer the front vehicle body 41 and the rear vehicle body 42 of the medium-length pickup truck from the coating line 1 to the corresponding positions of the final assembly line 3;

[0042] Among them, the painting trolley 11 is used to transport the front body 41 of the medium-long pickup truck and the rear body 42 of the medium-long pickup truck to the corresponding positions of the painting side lifting machine 12 respectively, and the painting side lifting machine 12 is used to lift the front body 41 of the medium-long pickup truck or the rear body 42 of the medium-long pickup truck; the front side lifting machine 32 of the general assembly is used to lift the front body 41 of the medium-long pickup truck transported by the three-fork arm body transfer mechanism 2 and place it on the general assembly trolley 31, and the rear side lifting machine 33 of the general assembly is used to lift the rear body 42 of the medium-long pickup truck transported by the three-fork arm body transfer mechanism 2 and place it on the general assembly trolley 31;

[0043] Furthermore, if Figure 2-5As shown, the front assembly top machine 32 includes a first assembly frame 321, a first assembly drive motor 322, a first assembly transmission shaft 323 and two first assembly support brackets 324 arranged at intervals, so as not to affect the three-fork arm body transfer mechanism 2 in transporting the body to the assembly line 3; wherein the first assembly drive motor 322 is fixedly mounted on the first assembly frame 321, the first assembly transmission shaft 323 is connected to the first assembly drive motor 322, so as to realize the synchronous movement of the first assembly support bracket 324 on the same side, and realize the synchronous movement of the first assembly support bracket 324 on the other side through the first assembly transmission chain 325, thereby realizing the synchronous lifting of the two first assembly support brackets 324 on both sides of the front assembly top machine 32; a plurality of first assembly support columns 3241 are arranged on the first assembly support bracket 324 according to different body types for supporting the body;

[0044] like Figure 6-9 As shown, the final assembly rear side top machine 33 of the final assembly line 3 includes a final assembly second frame 331, a final assembly second drive motor 332, a final assembly second transmission shaft 333 and two final assembly second support brackets 334 arranged at intervals, so as not to affect the three-fork arm car body transfer mechanism 2 to transport the car body to the final assembly line 3; the final assembly second drive motor 332 is fixedly installed on the final assembly second frame 331, and the final assembly second transmission shaft 333 is connected to the final assembly second drive motor 332 to achieve synchronous movement of the final assembly second support bracket 334 on the same side, and the final assembly second transmission chain 335 is used to achieve synchronous movement of the final assembly second support bracket 334 on the other side, thereby achieving synchronous lifting of the two final assembly second support brackets 334 on both sides of the final assembly rear side top machine 33; the final assembly second support bracket 334 is provided with a plurality of final assembly second support columns 3341 for supporting the car body according to different car bodies;

[0045] The inner width of the front assembly top machine 32 and the rear assembly top machine 33 is greater than the outer width of the assembly trolley 31. The working height of the front assembly top machine 32 and the rear assembly top machine 33 is lower than the height of the assembly trolley 31, which does not affect the movement of the assembly trolley 31 carrying a medium-length pickup truck. The two first assembly support brackets 324 and the two second assembly support brackets 334 are designed to be spaced apart to avoid interfering with the three-fork arm body transfer mechanism 2 in transporting the body to the assembly line 3.

[0046] Furthermore, if Fig.10As shown, the painting side top machine 12 includes a painting frame 121, a painting drive motor 122, a painting transmission shaft 123, a painting movable load-bearing frame 124 and four painting support brackets 125 arranged at intervals, so as not to affect the three-fork arm vehicle body transfer mechanism 2 from loading the vehicle body from the painting line 1; wherein, the painting drive motor 122 is fixedly mounted on the painting frame 121, the painting transmission shaft 123 is connected to the painting drive motor 122, the painting transmission shaft 123 drives the painting movable load-bearing frame 124 to move up and down through a chain transmission, and the four painting support brackets 125 are arranged on the painting movable load-bearing frame 124, so as to realize the synchronous movement of the painting support bracket 125 on the same side, and realize the synchronous movement of the painting support bracket 125 on the other side through the transmission chain transmission, thereby realizing the synchronous lifting of the four painting support brackets 125 on both sides of the painting side top machine 12; a plurality of painting support columns 1251 are arranged on the painting support bracket 125 according to different vehicle bodies for supporting the vehicle body;

[0047] Furthermore, if Figure 11-13 As shown, the three-fork arm vehicle body transfer mechanism 2 includes

[0048] The first fork arm 21, the second fork arm 22, the third fork arm 23, the mounting base 24, the fork arm drive motor 25 and the connecting rod 26; the first fork arm 21, the second fork arm 22 and the third fork arm 23 are fixedly installed on the mounting base 24 at intervals, and the intervals thereof meet the requirements of transferring the front body 41 and the rear body 42 of the medium-length pickup truck; the first fork arm 21, the second fork arm 22 and the third fork arm 23 are fixedly connected by the connecting rod 26, and each connecting rod 26 is respectively provided with a transmission shaft 261, so that the first fork arm 21, the second fork arm 22 and the third fork arm 23 move synchronously; the transmission shaft 261 is connected to the fork arm drive motor 25, and the fork arm drive motor 25 is fixed on the mounting base 24;

[0049] The distance between the first fork arm 21 and the second fork arm 22 matches the length of the front body 41 of the medium-long pickup truck, and is used to carry the front body 41 of the medium-long pickup truck; the distance between the second fork arm 22 and the third fork arm 23 matches the length of the rear body 42 of the medium-long pickup truck, and is used to carry the rear body 42 of the medium-long pickup truck;

[0050] Furthermore, the first fork arm 21, the second fork arm 22 and the third fork arm 23 have the same structure, and the structure of the first fork arm 21 / the second fork arm 22 / the third fork arm 23 includes

[0051] A slide rail base 221, a slide table 222 and a plurality of support columns 223; the slide rail base 221 is fixedly connected to the mounting base 24; the slide rail base 221 and the slide table 222 cooperate to form a back-and-forth sliding mechanism to achieve the telescopic movement of the slide table 222; a fixed platform 224 is provided on the slide table 222, and a plurality of support columns 223 are provided at corresponding positions on the fixed platform 224 for supporting the vehicle body to be transferred.

[0052] The PBS transfer scheme of the present invention comprises the following steps:

[0053] Step 1, after the painting trolley 11 carrying the front body 41 of the medium-length pickup truck arrives at the designated position, the external control system sends a control signal to the painting side lifting machine 12, and the painting side lifting machine 12 is driven by the painting drive motor 122 to lift the front body 41 of the medium-length pickup truck to the designated height, and the painting trolley 11 leaves.

[0054] Step 2, the external control system sends a control signal to the three-fork arm body transfer mechanism 2, the three-fork arm body transfer mechanism 2 is driven by the fork arm drive motor 25 to extend from the waiting working position to under the front body 41 of the medium and long pickup truck on the side of the painting line 1, and the external control system sends a control signal to the painting side top machine 12, the painting side top machine 12 slowly descends to the waiting working position, and the front body 41 of the medium and long pickup truck falls accordingly to the first fork arm 21 and the second fork arm 22 of the three-fork arm body transfer mechanism 2.

[0055] Step 3, after the painting side lift machine 12 descends to the waiting working position, the external control system sends a control signal to the three-fork arm body transfer mechanism 2, and the three-fork arm body transfer mechanism 2 carries the medium and long pickup front body 41 and moves toward the side of the general assembly line 3. After the three-fork arm body transfer mechanism 2 moves to the specified position, the external control system sends a control signal to the general assembly front side lift machine 32, and the general assembly front side lift machine 32 is driven by the general assembly first drive motor 322 to lift the medium and long pickup front body 41 to the specified height, and the three-fork arm body transfer mechanism 2 returns to the waiting working position.

[0056] Step 4, after the three-fork arm body transfer mechanism 2 returns to the waiting working position, the external control system sends a control signal to the assembly trolley 31. After the assembly trolley 31 moves to the specified position, the assembly front top machine 32 slowly descends to the waiting working position, and the front body 41 of the medium and long pickup truck then drops onto the assembly trolley 31. The assembly trolley 31 moves forward a specified distance to avoid interfering with the re-transferring of the three-fork arm body transfer mechanism 2; the transfer of the front body 41 of the medium and long pickup truck is completed.

[0057] Step 5, after the painting trolley 11 carrying the rear body 42 of the medium-length pickup truck arrives at the designated position, the external control system sends a control signal to the painting side lifting machine 12, and the painting side lifting machine 12 is driven by the painting drive motor 122 to lift the rear body 42 of the medium-length pickup truck to the designated height, and the painting trolley 11 leaves.

[0058] Step 6, the external control system sends a control signal to the three-fork arm body transfer mechanism 2, the three-fork arm body transfer mechanism 2 is driven by the fork arm drive motor 25 to extend from the waiting working position to under the rear body 42 of the medium and long pickup truck on the side of the painting line 1, and the external control system sends a control signal to the painting side top machine 12, the painting side top machine 12 slowly descends to the waiting working position, and the rear body 42 of the medium and long pickup truck falls accordingly to the second fork arm 22 and the third fork arm 23 of the three-fork arm body transfer mechanism 2.

[0059] Step 7, after the painting side lift machine 12 descends to the waiting working position, the external control system sends a control signal to the three-fork arm body transfer mechanism 2, and the three-fork arm body transfer mechanism 2 carries the rear body 42 of the medium and long pickup truck and moves toward the side of the general assembly line 3. After the three-fork arm body transfer mechanism 2 moves to the specified position, the external control system sends a control signal to the general assembly rear side lift machine 33, and the general assembly rear side lift machine 33 is driven by the second general assembly drive motor 332 to lift the rear body 42 of the medium and long pickup truck to a specified height, and the three-fork arm body transfer mechanism 2 returns to the waiting working position.

[0060] Step 8, after the three-forked arm body transfer mechanism 2 returns to the waiting working position, the external control system sends a control signal to the final assembly trolley 31, and the final assembly trolley 31 carrying the front body 41 of the medium and long pickup truck retreats a specified distance. After reaching the specified position, the final assembly rear top machine 33 slowly descends to the waiting working position, and the rear body 42 of the medium and long pickup truck then descends and falls onto the final assembly trolley 31; at this point, the front body 41 and the rear body 42 of the medium and long pickup truck fall on the same final assembly trolley 31, and the medium and long pickup truck painting line passing is changed from a split-type painting line passing.

[0061] The transfer fork arm used for PBS transfer of the present invention adopts a three-fork arm structure to realize the transfer from the coating line 1 to the final assembly line 3, saving materials and reducing costs; without affecting the JPH of the final assembly line 3, the number of final assembly trolleys 31 used is reduced, and the requirements for the production line are reduced; through the present invention, a compact coating production line can be realized for the production of medium and long pickup trucks.

Claims

1. A medium-length pickup truck PBS transfer system, characterized in that: include A coating line, the coating line having a coating trolley and a coating side top machine; A general assembly line, the general assembly line having a general assembly trolley, a general assembly front top machine and a general assembly rear top machine; A three-fork arm body transfer mechanism, which is used to transfer the front body of a medium-length pickup truck and the rear body of a medium-length pickup truck from the coating line to corresponding positions of the general assembly line in sequence; Among them, the painting trolley is used to transport the front body and the rear body of the medium-long pickup truck to the corresponding positions of the painting side lifting machine respectively, and the painting side lifting machine is used to lift the front body or the rear body of the medium-long pickup truck; the front side lifting machine of the general assembly is used to lift the front body of the medium-long pickup truck on the three-forked arm body transfer mechanism and place it on the general assembly trolley, and the rear side lifting machine of the general assembly is used to lift the rear body of the medium-long pickup truck on the three-forked arm body transfer mechanism and place it on the general assembly trolley.

2. The medium-long pickup truck PBS transfer system according to claim 1 is characterized in that: The front assembly top machine includes a first assembly frame, a first assembly drive motor, a first assembly transmission shaft, and two first assembly support brackets arranged at intervals, so as not to affect the three-fork arm car body transfer mechanism from transporting the car body to the assembly line; wherein, the first assembly drive motor is fixedly mounted on the first assembly frame, the first assembly transmission shaft is connected to the first assembly drive motor, so as to realize the synchronous movement of the first assembly support bracket on the same side, and realize the synchronous movement of the first assembly support bracket on the other side through the first assembly transmission chain, thereby realizing the synchronous lifting of the two first assembly support brackets on both sides of the front assembly top machine; a plurality of first assembly support columns are arranged on the first assembly support bracket according to different car bodies for supporting the car body; The assembly rear top machine comprises an assembly second frame, an assembly second drive motor, an assembly second transmission shaft and two assembly second support brackets arranged at intervals; the assembly second drive motor is fixedly mounted on the assembly second frame, the assembly second transmission shaft is connected to the assembly second drive motor, so as to realize synchronous movement of the assembly second support brackets on the same side, and realize synchronous movement of the assembly second support brackets on the other side through the assembly second transmission chain, thereby realizing synchronous lifting of the two assembly second support brackets on both sides of the assembly rear top machine; a plurality of assembly second support columns are arranged on the assembly second support bracket according to different car bodies for supporting the car body; The inner width of the front assembly top machine and the rear assembly top machine is greater than the outer width of the assembly trolley. The working height of the front assembly top machine and the rear assembly top machine is lower than the height of the assembly trolley, which does not affect the movement of the assembly trolley carrying medium and long pickup trucks. The two first assembly support brackets and the two second assembly support brackets are designed to be spaced apart to avoid interfering with the three-fork arm body transfer mechanism in transporting the body to the assembly line.

3. The medium-long pickup truck PBS transfer system according to claim 2 is characterized in that: The coating side top machine includes a coating frame, a coating drive motor, a coating transmission shaft, a coating mobile load-bearing frame and four coating support brackets arranged at intervals so as not to affect the three-fork arm body transfer mechanism from loading the body from the coating line; Among them, the painting drive motor is fixedly installed on the painting machine frame, the painting transmission shaft is connected to the painting drive motor, and the painting transmission shaft drives the painting movable load-bearing frame to move up and down through a chain. The four painting support brackets are arranged on the painting movable load-bearing frame to realize the synchronous movement of the painting support brackets on the same side, and the synchronous movement of the painting support brackets on the other side is realized through transmission chain transmission, thereby realizing the synchronous lifting and lowering of the four painting support brackets on both sides of the painting side top machine; a plurality of painting support columns are arranged on the painting support bracket according to different vehicle bodies for supporting the vehicle body.

4. The medium-long pickup truck PBS transfer system according to claim 3 is characterized in that: The three-fork arm vehicle body transfer mechanism comprises A mounting base, a fork arm driving motor, a connecting rod, a first fork arm, a second fork arm and a third fork arm; the first fork arm, the second fork arm and the third fork arm are fixedly installed on the mounting base at intervals, and the intervals between them meet the requirements of transferring the front body of a medium-length pickup truck and the rear body of a medium-length pickup truck; the first fork arm, the second fork arm and the third fork arm are fixedly connected by the connecting rod, and each of the connecting rods is respectively provided with a transmission shaft, so that the first fork arm, the second fork arm and the third fork arm move synchronously; the transmission shaft is connected to the fork arm driving motor, and the fork arm driving motor is fixed on the mounting base; The distance between the first fork and the second fork matches the length of the front body of a medium-length pickup truck, and is used to carry the front body of a medium-length pickup truck; the distance between the second fork and the third fork matches the length of the rear body of a medium-length pickup truck, and is used to carry the rear body of a medium-length pickup truck.

5. The medium-long pickup truck PBS transfer system according to claim 4 is characterized in that: The first fork arm, the second fork arm and the third fork arm have the same structure. The structure of the first fork arm / the second fork arm / the third fork arm includes A slide rail base, a slide table and a plurality of support columns, wherein the slide rail base is fixedly connected to the mounting base, and the slide rail base and the slide table cooperate to form a mechanism for sliding back and forth to realize the telescopic movement of the slide table; a fixed platform is arranged on the slide table, and a plurality of support columns are arranged at corresponding positions on the fixed platform for supporting the vehicle body to be transferred.

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