A suspended logistics conveying device

Abstract

The application discloses a suspension type logistics conveying device and belongs to the field of assembly line transmission. The suspension type logistics conveying device comprises linear guide rails, climbing or descending rails, connecting rails, at least two climbing or descending rails, at least two linear rails located at different heights and a plurality of connecting arc-shaped rails which are connected in a head-tail mode to form at least one closed loop rail, wherein the linear guide rails, the climbing or descending rails and the connecting rails are all sectional rail driving devices. The application is formed by splicing a plurality of sectional rail driving devices to form a closed assembly line. Compared with the traditional chain transmission mode, the application has the following advantages: compact and reasonable structure, simple and reliable rail, high efficiency, fast transmission speed, flexible walking, almost no noise, stable operation, very stable start and stop at each position, easy to realize intelligent and automatic operation, and safety and reliability.

Description

Technical Field

[0001] This invention belongs to the field of assembly line transportation, and in particular to a suspended logistics conveying device. Background Technology

[0002] Overhead conveyors are three-dimensional, closed-loop, continuous material transport devices suitable for the automated transport of packaged goods within and between workshops. They are typically suspended from the workshop ceiling or installed on ground supports, running along predetermined tracks. The conveyor body can navigate slopes, turns, and form circular arrangements, offering flexible movement and a small footprint. During workpiece transport, multi-point aerial drive is employed, and the conveying speed can be adjusted, making it highly advantageous for mechanical assembly and other operations. It is currently one of the most widely used conveying products in domestic enterprises.

[0003] Existing overhead conveyor drive systems typically employ a sprocket added to the output shaft of a directly coupled motor reducer, which in turn drives a small circular chain via a chain. A lever actuates the conveyor. The guide rails are made of 16Mn material and undergo advanced machining, with a service life of approximately 5 years. Common chain pitches include 150 / 240 / 250 mm, and the single-point load capacity varies. Furthermore, by selecting different types of lifting devices, the single-point load capacity of the chain can be increased, and different shaped parts can be accommodated. The disadvantages include high noise levels, the inability to move vertically up and down or back and forth in assembly line processes, the need for lubrication, and the potential for contamination of the fluorescent liquid during fluorescent non-destructive testing, affecting testing accuracy. Summary of the Invention

[0004] To overcome the above-mentioned technical defects, the present invention provides a suspended logistics conveying device to solve the problems involved in the background art.

[0005] This invention provides a suspended logistics conveying device, comprising:

[0006] Linear guide rail, climbing or descending track, connecting track; at least two sections of the climbing or descending track and at least two sections of the linear track at different heights, and several connecting arc tracks connected end to end to form at least one closed loop track;

[0007] Among them, the linear guide rail, the climbing or descending track, and the connecting track are all segmentable track drive devices; the segmentable track drive device includes: a mounting beam, a drive guide rail with a circular cross-section that is disposed below the mounting beam and can rotate along its central axis, and two transmission guide rails that are installed below the mounting beam, located below the drive guide rail, and separated from the drive guide rail by a predetermined distance in the vertical direction;

[0008] The transport trolley is positioned between the drive rail and the transmission rail, and can move linearly along the drive rail and the transmission rail. A gripper is provided below the transport trolley, and the gripper passes through a predetermined gap between the two transmission rails and is located below the transmission rail.

[0009] Preferably or optionally, the drive guide rail is provided with built-in bearings at both ends, and the built-in bearings are suspended on the mounting beam by a mounting bracket;

[0010] A variable frequency motor is also installed on the frame, and at least one built-in gear is provided at both ends or in the middle of the drive guide rail. The variable frequency motor is connected to the built-in gear through a chain.

[0011] Preferably or optionally, the outer diameters of the built-in gear and the built-in bearing are both smaller than the diameter of the drive guide rail.

[0012] Preferably or optionally, the transport trolleys are arranged in groups of two, and a rigid crossbeam is installed on the gripper. The two transport trolleys are fixedly connected to form a whole.

[0013] Preferably or optionally, the length of the drive rail in the connecting track is less than the length of the crossbeam.

[0014] Preferably or optionally, the segmentable track drive device may also include an automatic lifting device configured to control the vertical movement of the transport trolley and the part to be tested;

[0015] The automatic lifting device includes: a frame, a lifting cylinder vertically mounted at the bottom of the frame, lifting guide rails mounted on both sides of the frame, and a mounting plate slidably mounted on the lifting guide rails and connected to the output end of the lifting cylinder.

[0016] Preferably or optionally, a mounting beam is provided on the mounting plate, the mounting beam extending to the outside of the frame.

[0017] Preferably or optionally, the transport trolley includes a vehicle body, a plurality of drive wheels obliquely and symmetrically mounted above the vehicle body and abutting against both sides of the outer surface of the drive guide rail, and a plurality of driven wheels disposed at the lower part of the vehicle body and locked on the transmission guide rail;

[0018] The vehicle body includes an upper part for mounting the drive wheel and a lower part for mounting the driven wheel. A storage spring is provided between the upper and lower parts to ensure that the drive wheel is always in contact with the drive guide rail.

[0019] The rotation axis of the drive wheel is inclined at a predetermined angle relative to the horizontal plane and inward at a predetermined angle relative to the vertical plane containing the central axis of the drive guide rail.

[0020] Preferably or optionally, the jaw includes: a connecting rod passing through a predetermined gap between two transmission guide rails, a clamping portion provided at the bottom of the connecting rod and having a "冂"-shaped cross-section, screw holes provided on both sides of the clamping portion, and bolts provided on the screw holes on both sides.

[0021] Preferably or optionally, a plurality of processing stations are provided at the bottom of the suspended material handling conveyor; the processing stations are successively a loading area, a pre-cleaning area, a fluorescent penetration area, a second spray cleaning area, an emulsion immersion area, a third spray cleaning area, a liquid replenishment area, a drying area, an imaging area, and an unloading area.

[0022] The present invention relates to a suspended material handling conveyor. Compared with the prior art, it has the following beneficial effects: By using a plurality of sectionalized track driving devices for splicing to form a closed assembly line, compared with the traditional chain transmission method, the present invention has the following advantages: compact and reasonable structure, simple and reliable track, high efficiency, fast transmission speed, flexible movement, almost no noise, stable operation, and can start and stop very smoothly at each position, facilitating the implementation of intelligent fully automated operation, and being safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural view of the fluorescent penetration non-destructive testing line in the present invention.

[0024] Figure 2 is a schematic structural view of a partial area of the circular track in the present invention.

[0025] Figure 3 is a top view of a partial area of the circular track in the present invention.

[0026] Figure 4 is a side view of a partial area of the circular track in the present invention.

[0027] Figure 5 is a schematic structural view of the sectionalized track driving device in the present invention.

[0028] Figure 6 is a schematic structural view of the automatic lifting device in the present invention.

[0029] Figure 7 is a side view of the sectionalized track driving device in the present invention.

[0030] Figure 8 is a partial enlarged view of the sliding trolley in the present invention.

[0031] Figure 9 is a schematic installation view of the driving wheel in the present invention.

[0032] The attached diagram is labeled as follows: 201 Loading area, 202 Ultrasonic cleaning equipment, 203 First spray cleaning area, 204 Hot soaking equipment, 205 Drying equipment area, 206 Automatic spray gun spraying station, 207 Automatic soaking station, 208 Accumulation area, 209 Second spray cleaning area, 210 Emulsion soaking area, 211 Third spray cleaning area, 212 Replenishment area, 213 Buffer area, 214 Imaging area, 215 Unloading area, 216 Transport trolley waiting area, 100 Circular track, A linear guide rail, B Inclined or descending track. 1. Connecting track C, segmented track drive device 110, mounting beam 111, drive guide rail 112, transmission guide rail 113, variable frequency motor 114, chain 115, automatic lifting device 120, frame 121, lifting cylinder 122, lifting guide rail 123, mounting plate 124, limit device 125, transport trolley 130, trolley body 131, drive wheel 132, driven wheel 133, energy storage spring 134, gripper 140, connecting rod 141, clamping part 142, bolt 143, crossbeam 150. Detailed Implementation

[0033] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.

[0034] See appendix Figure 1 The fluorescence penetrant nondestructive testing line includes, in sequence, a loading area 201, a pre-cleaning area, a fluorescence penetrant area, a second spray cleaning area 209, an emulsion immersion area 210, a third spray cleaning area 211, a replenishment area 212, a drying area, a developing area 214, a unloading area 215, and a waiting area 216 for a transport trolley 130. The pre-cleaning area includes, in sequence, an ultrasonic cleaning device 202, a first spray cleaning area 203, a hot immersion device 204, and a drying device. The fluorescence penetrant area includes an automatic spray gun station 206, an automatic immersion station 207, and an accumulation area 208. The automatic spray gun station 206 and the automatic immersion station 207 are arranged in parallel, allowing the user to select the penetrant method according to their needs.

[0035] In addition, the loading area 201 is provided with at least two paths to the fluorescent penetration area. Path one connects the loading area 201 to the pre-cleaning area, and then connects to the fluorescent penetration area through the pre-cleaning area. Path two skips the pre-cleaning area and connects directly to the fluorescent penetration area. The parts to be processed pass through the fluorescent penetration area, the second spray cleaning area 209, the emulsion immersion area 210, the third spray cleaning area 211, the replenishment area 212, the drying area, and the developing area 214 in sequence before reaching the unloading area 215. In this way, users can select different paths according to the inspection requirements and standards of the parts to be inspected, meet the inspection requirements of workpieces with different surface cleanliness, save process steps, and realize intelligent and fully automated operation according to the time and action requirements set by the control system.

[0036] Considering the varying time requirements of each process, and to improve production efficiency, in this embodiment, the overhead conveyor tracks at the top of the automatic soaking station 207, the accumulation area 208, and the developing area 214 are arranged in two parallel lines. Additionally, multiple waiting areas 216 for transport trolleys 130 are provided along the overhead conveyor tracks. In this embodiment, the waiting areas 216 can simultaneously hold 60 standard hanging fixtures and 10 large product hanging fixtures, providing strong buffering performance during the entire production line's movement and improving production efficiency.

[0037] With the rapid development of high-end manufacturing, the requirements for overhead conveyors are becoming increasingly stringent. In the non-destructive testing production line equipment for aero-engine blades, the overhead conveyor sometimes needs to move the blades vertically up and down by 800-1000mm to immerse them in an emulsion tank, and sometimes it needs to move the blades back and forth by about 1000mm for water gun rinsing. At the same time, it is required that all the liquids in the tanks on the production line are not contaminated. When the blades being tested are heavily oiled, a pre-cleaning process must also be considered. The length of the production line can reach 1-2km.

[0038] To overcome the shortcomings of existing sprocket and chain driven overhead conveyors, we designed an overhead logistics conveying device. (See attached document.) Figures 2 to 9 The suspended logistics conveying device includes: a linear guide rail A, an incline or descent track B, and a connecting track C; at least two sections of the incline or descent track and at least two sections of the linear track at different heights, and several connecting arc tracks connected end to end to form at least one closed loop track 100.

[0039] Among them, the linear guide rail A and the climbing or descending track B are both segmented track drive devices 110; the segmented track drive device 110 includes: a mounting beam 111, a drive guide rail 112 with a circular cross-section and rotatable along its central axis, which is disposed below the mounting beam 111, and is disposed below the drive guide rail 112, and is disposed below the drive guide rail 112 and is separated from the drive guide rail 112 by a predetermined distance in the vertical direction.

[0040] The transport trolley 130 is positioned between the drive rail 112 and the transmission rail 113, allowing it to move linearly along both rails. A gripper 140 is located below the transport trolley 130, passing through a predetermined gap between the two transmission rails 113 and positioned below them. It should be noted that the gap at the connection point between the linear guide rail A, the incline or descent rail B, and the connecting rail C is smaller than the distance between the front and rear wheels of the transport trolley 130. During transport, the gripper 140 clamps and secures the part to be inspected, propelling the trolley forward along the assembly line. When the variable frequency motor 114 drives the drive rail 112 to rotate, friction drives the drive wheel 132, causing the transport trolley 130 carrying the part to move forward along the transmission rail 113.

[0041] In a specific area, to enable the trolley 130 carrying parts to move back and forth, the upper drive rail 112 and transmission rail 113 of this section of the track are disconnected from the drive rails 112 and transmission rails 113 of other areas. A separate drive unit with a variable frequency motor 114 is configured to drive this section of the drive rail 112. The forward and reverse rotation of the variable frequency motor 114 is automatically controlled by the intelligent system, which causes the drive rail 112 to rotate in both directions, thus achieving the back-and-forth motion. By setting up multiple such back-and-forth motion devices in parallel according to the cycle requirements in the production line, the normal operation of the production line can be ensured during this lifting process.

[0042] The transport trolley 130 is located between the drive rail 112 and the transmission rail 113, as shown in the appendix. Figure 5Located between the drive rail 112 and the transmission rail 113, the transport trolley 130 includes a main body 131, four drive wheels 132 obliquely and symmetrically mounted above the main body 131 and abutting against both sides of the outer surface of the drive rail 112, and a plurality of driven wheels 133 disposed at the lower part of the main body 131 and engaged on the transmission rail 113. The main body 131 includes an upper part for mounting the drive wheels 132 and a lower part for mounting the driven wheels 133. A spring 134 is disposed between the upper and lower parts to ensure that the drive wheels 132 always abut against the drive rail 112. The rotation axis of the drive wheels 132 is inclined at a predetermined angle relative to the horizontal plane and inwardly at a predetermined angle relative to the vertical plane containing the central axis of the drive rail 112. The driven wheel 133 is disposed on the side and upper surface of the transmission guide rail 113, so that the transport trolley 130 is locked on the transmission guide rail 113, thereby improving the stability of the transport trolley 130.

[0043] In other words, when the drive rail 112 rotates, the drive wheel 132 can be driven to rotate by friction. The drive wheel 132 is inclined to the transmission direction of the motion device and can be decomposed into a force moving along the transmission direction of the motion device and a force moving perpendicular to the transmission direction. The force moving perpendicular to the transmission direction cancels each other out. The drive wheel 132 and the driven wheel 133 are integrated, and the driven wheel 133 is slidably mounted on the transmission rail 113. Therefore, the transport trolley 130 can move in a straight line along the transmission rail 113.

[0044] See appendix Figure 9 Each transport trolley 130 has four diagonally symmetrically arranged wheels that contact the drive rail 112. This symmetrical arrangement allows the trolley to rotate in both directions. The lower wheel set consists of two groups of four horizontally arranged wheels each, which contact the transmission rail and move forward along it, bearing the weight of the parts and the trolley itself. A separate drive unit with a variable frequency motor 114 drives this section of the drive rail 112, controlling the driven wheels 133 of the transport trolley 130 to move along the transmission rail 113 at a speed between 1-30 meters per minute. One variable frequency motor 114 can drive a 20-30 meter long section of the drive rail 112. Increasing the capacity of the drive unit increases the lifting force of the trolley; the maximum lifting force of a single trolley can reach 1000 kg or even more. Increasing the number of drive units allows for the extension of the conveyor length, up to a maximum of 3 km.

[0045] In a further embodiment, the drive rail 112 is provided with built-in bearings at both ends, and the built-in bearings are suspended on the mounting beam 111 by a mounting bracket. The outer diameter of the built-in bearings is smaller than the diameter of the drive rail 112. Similarly, at least one built-in gear is provided at both ends or in the middle of the drive rail 112, and the variable frequency motor 114 is connected to the built-in gear via a chain 115 or a belt. The outer diameter of the built-in gear is smaller than the diameter of the drive rail 112. In this way, the drive rail 112 can be installed below the mounting beam 111 without interference between the drive rail 112 and the drive wheel 132 of the transport trolley 130, ensuring the continuity of the assembly line transport.

[0046] In a further embodiment, the gripper 140 includes: a connecting rod 141 passing through a predetermined gap between two transmission guide rails 113; a clamping portion 142 with a "U" cross-sectional shape disposed at the bottom of the connecting rod 141; screw holes disposed on both sides of the clamping portion 142; and bolts 143 disposed on the screw holes on both sides. The gap between the bolts 143 on both sides is manually adjusted to clamp the part to be tested, thereby fixing the part to be tested.

[0047] During the operation of a suspended assembly line, due to the requirements of specific processes, a certain section of the suspended parts needs to be vertically raised and lowered a certain distance, while other parts of the assembly line need to operate normally at the same time. This is completely impossible to achieve on the most commonly used sprocket and chain 115 suspended conveyor.

[0048] Therefore, the segmentable track drive device 110 also includes an automatic lifting device 120, configured to control the vertical movement of the transport trolley 130 and the part to be inspected; see appendix. Figure 6 The automatic lifting device 120 includes: a frame 121, a lifting cylinder 122 vertically disposed at the bottom of the frame 121, lifting guide rails 123 disposed on both sides of the frame 121, and a mounting plate 124 slidably mounted on the lifting guide rails 123 and connected to the output end of the lifting cylinder 122.

[0049] By mounting the transmission guide rail 113, drive guide rail 112, and the drive device for rotating the drive guide rail 112 as a whole on the mounting beam 111, and equipping it with a cylinder to control the vertical lifting of the mounting beam 111, the transmission guide rail 113 and drive guide rail 112 are disconnected from the overall production line. After the parts have completed their process, the lifting cylinder 122 returns them to their original height, aligning them with the overall production line, so that the transport trolley 130 can continue to move forward. By setting up multiple such vertical lifting devices side-by-side in the production line according to the cycle time requirements, the normal operation of the production line can be ensured throughout the lifting process.

[0050] In a further embodiment, in order to improve the lifting stability of the mounting beam 111, at least two limiting devices 125 are provided on the lifting guide rail 123, respectively for two states of the mounting beam 111: one is to ensure that the mounting beam 111 is flush with the overall production line, and the other is to ensure that the part to be inspected is exactly located on the processing station.

[0051] Specifically, the limiting device 125 includes: a limiting hole provided on the slider, a limiting cylinder fixedly installed on the frame 121, and a limiting rod installed on the limiting cylinder, the limiting rod being able to pass through the limiting hole. When the mounting plate 124 moves to the predetermined area, the limiting rod is pushed into the mounting hole by the lifting cylinder 122, thereby fixing the mounting plate 124.

[0052] To ensure the smooth passage of the transport trolley 130 through the connecting track C, the transport trolleys 130 are arranged in pairs, hereinafter referred to as a group of transport trolleys 130. A rigid crossbeam 150 is installed on the gripper 140, and the two transport trolleys 130 are fixedly connected to form a whole. The chord length of the arc of the connecting track C is less than the distance between the two wheels of the trolley 130. The structure of the connecting track C is the same as that of the segmented track drive device 110, but the transmission guide rail 113 and the drive guide rail 112 of the connecting track C are arc-shaped, and the drive guide rail 112 does not rotate. Moreover, the drive guide rail 112 on the connecting track C can slide relative to the drive wheel 132. That is to say, the connecting track C does not need to be equipped with a separate variable frequency motor 114 as a drive device; it only needs that the chord length of the arc segment is less than the distance between the two wheels of the trolley 130.

[0053] When the transport trolley 130 passes through the connecting track C, the driven wheels 133 of the entire transport trolley 130 are engaged on the transmission guide rail 113. The rear transport trolley is still on the straight track and can still push the front transport trolley to move along the transmission guide rail 113, carrying the part to be inspected forward. After the front transport trolley 130 passes through the connecting track C and enters the straight track on the other side, the rear transport trolley 130 enters the connecting guide rail. The front transport trolley 130 drives the rear transport trolley 130 and the part to be processed to continue moving along the transmission guide rail 113, realizing the movement of the transport trolley 130 along the turning point.

[0054] To help readers better understand the suspended logistics conveying device scheme in this embodiment, it will now be explained in conjunction with a fluorescent penetrant nondestructive testing production line.

[0055] Step 1: Using two transport trolleys 130 as a group, the parts to be inspected are loaded from the loading area 201 at a rate of 1.8 parts per minute. Following the transport trolleys 130, the parts pass through the ultrasonic cleaning equipment 202 containing ultrasonic cleaning solvent for degreasing and preliminary cleaning. Upon entering the pre-cleaning area, a straight track of a certain length can be set as a buffer zone 213 to ensure the smooth movement of the entire production line. The automatic lifting device 120 vertically lifts the straight track, simultaneously immersing the three groups of trolleys on the straight track into the ultrasonic solvent. The lifting stroke is 800-1000mm. The cleaning process lasts for 3 minutes. Then, a single trolley passes through the first spray cleaning zone 203 at a speed of 10 m / min. The spray chamber of the first spray cleaning zone 203 is 2500 mm long and sprays for 1.2 minutes. After that, it stands for one minute to remove oil stains and cleaning solvent from the surface of the workpiece. Then, it passes through the hot immersion equipment 204 containing hot water at 80°C. The workpiece is then vertically lifted and immersed for 3.6 minutes by the automatic lifting equipment 120 to further soak the workpiece and thoroughly clean the residual stains in the dead corners. Then, 6 sets of transport trolleys 130 enter the drying equipment zone 205 in sequence and dry for 10 minutes.

[0056] Step Two: Workpieces that do not require cleaning pass directly through path two from loading area 201, bypassing the pre-cleaning area, and enter the fluorescent penetrating area directly; cleaned and dried workpieces are transferred to the fluorescent penetrating area. Based on the requirements of the parts to be tested, the fluorescent penetrating method is selected. Automatic spray gun spraying station 206 uses electrostatic spraying, with one group of transport carts 130 immersing at a time at a rate of 3 minutes per piece; automatic immersion station 207 uses an automatic lifting device 120 to vertically lift and lower the parts into the immersion tank containing the penetrating solution for fluorescent penetrating. A single automatic immersion station 207 immerses one group of transport carts 130 at a time at a rate of 10 minutes per piece, and two automatic immersion stations 207 can operate in parallel simultaneously; then, the parts enter the accumulation area 208 where they remain for 28 minutes to allow for static dripping. The accumulation area 208 can simultaneously hold 12 groups of transport carts 130.

[0057] Step 3: The workpiece surface is cleaned by forward and reverse spraying in the second spray cleaning zone 209. The tank in the second spray cleaning zone 209 is 2500mm long. After spray cleaning, the workpiece is left to stand for cleaning. Then, it is vertically lowered into the emulsion soaking zone 210 and soaked in the emulsion pool for 40 seconds. Of course, some processes do not require emulsification, so the support can enter the third spray cleaning zone 211 or the replenishment zone 212 along a straight track. After being sprayed and cleaned in forward and reverse rotation in the third spray cleaning zone 211 and replenished in the replenishment zone 212, the workpiece enters the drying zone for drying. Finally, after development in the developing zone 214, the workpiece is transferred to the unloading zone 215 for unloading, completing the intelligent fully automatic fluorescent penetrant non-destructive testing. In addition, a straight track of a certain length is set in front of the developing zone 214 as a buffer zone 213, which can buffer at least 6 sets of transport trolleys 130 at the same time to ensure the smooth movement of the entire production line.

[0058] The suspended material conveyor device in this embodiment is designed to meet the requirements of non-destructive testing of aerospace engine blades. It urgently requires intelligent, fully automated production line equipment to improve productivity and accuracy, achieving automated operation. This is of great significance for promoting technological advancements in non-destructive testing and improving the quality of engine blades. The suspended conveyor using this novel drive system is technologically advanced and can be widely applied in large-scale assembly line production operations in industries such as machinery, automotive, electronics, home appliances, light industry, food, chemicals, and clothing.

[0059] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

Claims

1. A suspended logistics conveying device, characterized in that, include: Straight track, climbing or descending track, connecting track; at least two climbing or descending tracks and at least two straight tracks at different heights, and several connecting arc tracks connected end to end to form at least one closed loop track; Among them, the straight track, the climbing or descending track, and the connecting track are all segmentable track drive devices; the segmentable track drive device includes: a mounting beam, a drive guide rail with a circular cross-section that is located below the mounting beam and can rotate along its central axis, and two transmission guide rails installed below the mounting beam and located below the drive guide rail and separated from the drive guide rail by a predetermined distance in the vertical direction; Built-in bearings are provided at both ends of the drive guide rail, and the built-in bearings are suspended on the mounting beam by the mounting bracket; a variable frequency motor is also provided on the frame, and at least one built-in gear is provided at both ends or in the middle of the drive guide rail, and the variable frequency motor is connected to the built-in gear through a chain; The transport trolley is positioned between the drive rail and the transmission rail, and can move linearly along the drive rail and the transmission rail. A gripper is provided below the transport trolley, and the gripper passes through a predetermined gap between the two transmission rails and is located below the transmission rail. The transport trolleys are arranged in pairs, with a rigid crossbeam mounted on the gripper. The two transport trolleys are fixedly connected to form a whole. The drive rail of the connecting track does not rotate, but it can slide relative to the drive wheel. The length of the drive rail of the connecting track is less than the length of the crossbeam. When a transport trolley passes through the connecting track, the rear transport trolley remains on the straight track and can push the front transport trolley to move along the transport rail. After the front transport trolley passes through the connecting track and enters the straight track on the other side, the rear transport trolley enters the connecting rail. The front transport trolley then drives the rear transport trolley and the part to be tested to continue moving along the transport rail. The segmented track drive device is installed on the automatic lifting equipment and is configured to control the up and down movement of the transport trolley and the part to be tested.

2. The suspended logistics conveying device according to claim 1, characterized in that, The outer diameters of the built-in gear and the built-in bearing are both smaller than the diameter of the drive guide rail.

3. The suspended logistics conveying device according to claim 1, characterized in that, The automatic lifting device includes: a frame, a lifting cylinder vertically mounted at the bottom of the frame, lifting guide rails mounted on both sides of the frame, and a mounting plate slidably mounted on the lifting guide rails and connected to the output end of the lifting cylinder.

4. The suspended logistics conveying device according to claim 3, characterized in that, A mounting beam is provided on the mounting plate, and the mounting beam extends to the outside of the frame.

5. The suspended logistics conveying device according to claim 1, characterized in that, The transport trolley includes a main body, a plurality of drive wheels obliquely and symmetrically mounted on the upper part of the main body and abutting against both sides of the outer surface of the drive guide rail, and a plurality of driven wheels disposed on the lower part of the main body and locked on the transmission guide rail; The vehicle body includes an upper part for mounting the drive wheel and a lower part for mounting the driven wheel. A storage spring is provided between the upper and lower parts to ensure that the drive wheel is always in contact with the drive guide rail. The rotating shaft of the driving wheel is inclined at a predetermined angle with respect to the horizontal plane and is inclined inward at a predetermined angle with respect to the vertical plane where the central axis of the driving guide rail is located.

6. The suspended logistics conveying device according to claim 1, characterized in that, The jaw includes: a connecting rod passing through a predetermined gap between two transmission guide rails, a clamping portion provided at the bottom of the connecting rod with a "冂" cross-sectional shape, screw holes provided on both sides of the clamping portion, and bolts provided on the screw holes on both sides.

7. The suspended logistics conveying device according to claim 1, characterized in that, A plurality of processing stations are provided at the bottom of the suspended material conveying device; the processing stations are in sequence a loading area, a pre-cleaning area, a fluorescent penetration area, a second spray cleaning area, an emulsifying liquid soaking area, a third spray cleaning area, a liquid replenishing area, a drying area, an imaging area, and a blanking area.

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