Double-in double-out loading and unloading trolley

Abstract

This utility model discloses a double-in, double-out loading and unloading trolley, comprising: wheels and a guide limiting mechanism at the bottom of the trolley body; two material racks arranged left and right and corresponding double push arms fixed on the body; the push arms are connected to a drive mechanism to realize synchronous loading and unloading of materials in two rows; the guide limiting mechanism clamps the middle track with an eccentric bearing under the mounting plate, and adjusts the alignment with a rotating shaft and a locking nut to achieve stable guidance during operation. This utility model improves transfer efficiency through the double material rack and double push arm design, uses bearing rolling guidance to replace the traditional C-groove structure, reduces wear and adapts to scenarios where materials in two rows are heavier, and the guide mechanism is easy to adjust, enhancing the stability of the trolley operation, making it suitable for large-scale mass production needs.

Description

Technical Field

[0001] This utility model belongs to the field of press loading and unloading technology, and in particular relates to a double-inlet double-outlet loading and unloading trolley. Background Technology

[0002] In the mass production of laminated products such as PCBs (printed circuit boards), loading and unloading trolleys are key equipment for automating the transfer of materials between external racks and presses. Currently, loading and unloading trolleys generally adopt a "single-in, single-out" operation mode, meaning they can only load and unload a single row of products (materials carried by multi-layer carrier boards) at a time. This results in low single-transfer efficiency, making it difficult to meet the capacity demands of large-scale mass production.

[0003] Meanwhile, the guiding structure of traditional loading and unloading trolleys usually relies on the C-shaped grooves on the circumference of the wheels to cooperate with the trolley rails for limiting and guiding. Because the C-shaped grooves and rails are not precisely fitted, the trolley is prone to lateral swaying due to gaps during operation, causing friction between the C-shaped grooves and the edge of the rails, which affects the stability and service life of the equipment. Utility Model Content

[0004] Based on this, and to address the aforementioned technical problems, a dual-inlet, dual-outlet loading and unloading trolley is provided.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A double-in, double-out loading and unloading trolley includes a trolley body, a material rack for horizontally placing multiple layers of material-bearing plates at equal vertical and horizontal intervals, a push arm for lowering the trolley so that its front-end multi-layer grippers respectively grasp the corresponding rear bearing parts of the material plates and push the material plates horizontally forward or horizontally backward into the material rack, and a drive mechanism for driving the push arm to move up and down and horizontally back and forth. The bottom of the trolley body has multiple wheels for the trolley to move horizontally on two spaced-apart tracks. The material rack and drive mechanism are fixed to the trolley body. The trolley body has two material racks arranged side-by-side, and two push arms connected to two material racks. The frames are one-to-one, and the two push arms are connected to the drive mechanism. The bottom of the trolley body also has at least one guide limiting mechanism for guiding and limiting the trolley body. The guide limiting mechanism includes a horizontal mounting plate and at least one pair of bearings for clamping the two sides of the intermediate track located parallel between the two travel tracks. Each bearing is horizontally arranged below the mounting plate and eccentrically fixed on a vertical rotating shaft. The rotating shaft is rotatably connected to the mounting plate and has an upper section and a lower section located on the upper and lower sides of the mounting plate, respectively. The upper section is threaded with a locking nut, and the lower section has an expansion portion formed on its circumferential surface for cooperating with the locking nut to clamp the mounting plate from top to bottom.

[0007] The beneficial effects of this utility model are as follows:

[0008] 1. Improve production efficiency: By setting up two material racks arranged on the left and right and two corresponding push arms, a "double in and double out" loading and unloading operation mode is realized, which can simultaneously transfer two rows of products. It is compatible with double in and double out material racks and presses, effectively increasing the material handling capacity of a single operation, significantly improving production efficiency, and meeting the needs of large-scale mass production.

[0009] 2. Reduced Wear Risk: The innovatively designed guide and limiting mechanism uses horizontally arranged bearings to clamp and guide both sides of the central track, replacing the traditional limiting method that relies on the C-groove of the wheel and its engagement with the track. The rolling friction between the bearings and the track reduces contact wear, while the adjustment structure of the eccentric shaft and locking nut allows for precise calibration of the alignment between the wheels and the track, preventing abnormal friction caused by shaking. Especially in double-row material handling scenarios, where the overall weight of the trolley increases, this guide and limiting mechanism effectively suppresses wear and extends the equipment's service life.

[0010] 3. Enhanced operational stability: The guide and limit mechanism provides stable guidance through the bearings on both sides of the middle track during the trolley's operation, strictly limiting the wheels to the corresponding travel track, effectively suppressing lateral swaying, ensuring the smooth operation of the trolley when carrying double rows of materials, and reducing the risk of positioning deviation during material transfer.

[0011] 4. Compact structure and convenient adjustment: The bearing, eccentric shaft and locking nut of the guide limit mechanism are integrated under the mounting plate, which is compact and occupies little space; the bearing clamping force can be adjusted by rotating the shaft by loosening the locking nut, and the locking nut can be fixed after completion. The operation is convenient and facilitates the installation, debugging and later maintenance of the equipment. Attached Figure Description

[0012] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0013] Figure 1 A three-dimensional structural diagram of a double-inlet double-outlet loading and unloading trolley provided for an embodiment of this utility model;

[0014] Figure 2 This is a schematic diagram showing the interaction between the wheels of the trolley body and the track in an embodiment of this utility model.

[0015] Figure 3 This is a schematic diagram of the guide and limiting mechanism according to an embodiment of the present utility model. Figure 1 ;

[0016] Figure 4 This is a schematic diagram of the guide and limiting mechanism according to an embodiment of the present utility model. Figure 2 ;

[0017] Figure 5 This is a schematic diagram of the structure of the limiting hook according to an embodiment of the present utility model;

[0018] Figure 6 This is a schematic diagram of the material rack structure according to an embodiment of the present utility model;

[0019] Figure 7 This is a schematic diagram of the drive mechanism according to an embodiment of the present utility model;

[0020] Figure 8 This is a schematic diagram of the gripper structure according to an embodiment of the present utility model;

[0021] Figure 9 This is a vertical sectional view of the drive unit according to an embodiment of the present utility model;

[0022] Figure 10 This is a schematic diagram of the carrier plate in an embodiment of the present invention. Detailed Implementation

[0023] The embodiments of this utility model will be described below with reference to the accompanying drawings. It should be noted that the embodiments described in this specification are not exhaustive and do not represent the only embodiments of this utility model. The following corresponding embodiments are only for clearly illustrating the utility model content of this patent and are not intended to limit its implementation. For those skilled in the art, different variations and modifications can be made based on the described embodiments. Any obvious variations or modifications that fall within the technical concept and utility model content of this utility model are also within the protection scope of this utility model.

[0024] like Figure 1 , Figure 7 and Figure 8 As shown, this utility model embodiment provides a double-in, double-out loading and unloading trolley, including a trolley body 1100, two material racks 1200, two push arms 1300, a gripper 1400, and a drive mechanism 1500.

[0025] like Figure 1 As shown, the trolley body 1100 has a frame 1110 and a maintenance ladder 1120 located on one side of the frame 1110.

[0026] like Figure 1 and Figure 2 As shown, the bottom of the trolley body 1100 has four wheels 1130 for the trolley to move horizontally on two spaced-apart tracks 2. Two of the wheels 1130 are driving wheels driven by a motor, and the other two wheels 1130 are driven wheels. The above structure is prior art and will not be described in detail here.

[0027] Each wheel 1130 is fixed to the trolley body 1100 via a wheel bracket 1131, such as Figure 5 As shown, each wheel frame 1131 has a limiting hook 1131a that hooks onto the outer side of the corresponding travel track 2 to prevent the wheel from derailing due to aging or damage of internal parts (such as bearings) of the wheel frame 1131.

[0028] like Figure 5 As shown, wheel 1130 is a flat wheel that only contacts the corresponding track 2 vertically.

[0029] like Figure 2 As shown, there is a parallel intermediate track 3 between the two travel tracks 2. Correspondingly, the bottom of the trolley body 1100 also has two guide limiting mechanisms 1140 for guiding and limiting the trolley body 1100. The two guide limiting mechanisms 1140 are arranged at intervals along the front and rear direction of the intermediate track 3. Of course, the number of guide limiting mechanisms 1140 is not limited to two.

[0030] Specifically, such as Figure 2 and Figure 3 As shown, the guide limiting mechanism 1140 includes a horizontal mounting plate 1141 and two pairs of bearings 1142 for clamping the two sides of the intermediate track 3.

[0031] The mounting plate 1141 has a vertical hanging plate 1141a, which is connected to the bottom of the trolley body 1100 by bolts.

[0032] Each bearing 1142 is horizontally arranged below the mounting plate 1141 and eccentrically fixed to a vertical rotating shaft 1143. The rotating shaft 1143 passes vertically through the mounting plate 1141 and is rotatably connected to it. The rotating shaft 1143 has an upper section 1143a and a lower section 1143b located on the upper and lower sides of the mounting plate 1141, respectively. The upper section 1143a is threaded with a locking nut 1144. An expansion portion 1143c is formed on the circumferential surface of the lower section 1143b to clamp the mounting plate 1141 from above and below in conjunction with the locking nut 1144. An eccentric shaft 1143d is formed on the lower end face of the lower section 1143b. The inner ring of the bearing 1142 is fitted onto the eccentric shaft 1143d and is limited by an elastic retaining ring 1145 (see [reference]). Figure 4 This forms an eccentric fixation between the bearing 1142 and the rotating shaft 1143.

[0033] An anti-loosening washer 1146 is provided between the locking nut 1144 and the mounting plate 1141.

[0034] Before the trolley starts running, loosen the locking nut 1144 and rotate the shaft 1143 so that the bearings 1142 on both sides clamp the middle rail 3 while ensuring that the wheel 1130 is aligned vertically with the corresponding travel rail 2. After that, tighten the locking nut 1144. In this way, the bearings 1142 on both sides of the middle rail 3 will always guide the trolley during operation and limit the wheel 1130 to the corresponding travel rail 2.

[0035] like Figure 1 As shown, two material racks are arranged at approximately 1200mm intervals, used to horizontally place multiple layers of material-bearing plates at equal intervals, such as... Figure 6 As shown, the material rack 1200 includes three pairs of side plates 1210 arranged opposite to each other on the left and right sides. The side plates 1210 are fixed to the frame 1110 by bolts. The opposite surfaces of the side plates 1210 are provided with multi-layer support assemblies 1220 for supporting the left and right edges of the carrier plate. Each layer of support assembly 1220 includes multiple support rollers 1221 arranged at intervals in front and behind.

[0036] The two push arms 1300 correspond one-to-one with the two material racks 1200, such as Figure 7 As shown, the push arm 1300 includes multiple horizontal plates 1310 in the left-right direction. The multiple horizontal plates 1310 are arranged vertically at intervals, and the rear side of each horizontal plate 1310 has two vertical plates 1311 arranged horizontally at intervals.

[0037] To improve the strength of the push arm 1300, the rear sides of multiple horizontal plates 1310 are connected together by two vertical plates 1312 on the left and right.

[0038] like Figure 8 As shown, each push arm 1300 has multiple grippers 1400 at its front end. The grippers are arranged at equal intervals, and the number of gripper layers is equal to the number of support components 1220 of the material rack 1200 and the number of horizontal plates 1310 of the push arm 1300.

[0039] like Figure 8 As shown, the gripper 1400 includes two fasteners 1410. The two fasteners 1410 are symmetrically fixed to the front side of the corresponding horizontal plate 1310 by bolts. The fasteners 1410 face the front-back direction, and their lower edges are lower than the lower edge of the horizontal plate 1310.

[0040] like Figure 7 As shown, the drive mechanism 1500 includes two drive units 1510 on the left and right. The two drive units 1510 correspond one-to-one with the two push arms 1300, and are used to drive the corresponding push arms 1300 to move up and down and horizontally back and forth in the corresponding material rack.

[0041] Specifically, such as Figure 8 As shown, the drive unit 1510 includes a front and rear horizontal drive module 1511 and a lifting module 1512.

[0042] The front and rear horizontal drive module 1511 includes a horizontal track 1511a in the front and rear direction, two drive chains 1511b and a sliding seat 1511c.

[0043] The horizontal track 1511a is fixed to the frame 1110 by bolts, and its upper surface has two rails 1511d arranged side by side in the front-to-back direction. See [reference needed] Figure 9 .

[0044] Two drive chains 1511b are arranged on the left and right sides of the horizontal track 1511a. The front and rear sprockets of the two drive chains 1511b are respectively connected to the two ends of the front and rear rotating shafts passing through the horizontal track 1511a. One of the rear sprockets is driven by a motor, and the rear sprockets of the two drive units 1510 are driven by the same motor.

[0045] like Figure 9 As shown, the reverse side of the sliding seat 1511c rests on two rails 1511d, and downwardly extending connecting parts 1511e are formed on its left and right sides. Multiple pins on the chain of the same-side transmission chain 1511b pass through the connecting parts 1511e, thereby fixing the sliding seat 1511c to the transmission chain 1511b. Under the drive of the motor, the sliding seat 1511c can move horizontally back and forth with the transmission chain 1511b.

[0046] like Figure 9 As shown, the front of the sliding seat 1511c has a guide post 1511f.

[0047] The lifting module 1512 uses a cylinder, such as Figure 8 and Figure 9 As shown, it is fixed to the top of the guide column 1511f, with the output end of the lifting module 1512 facing upwards. A lifting frame 1511g is connected to this output end, allowing it to rise and fall under the drive of the lifting module 1512. The lifting frame 1511g slides vertically with the guide column 1511f and is connected to the rear end of the longitudinal plate 1311 of the push arm 1300 on the same side via bolts. Wherein, as Figure 9 As shown, a copper plate 1511h is detachably fixed to the lifting frame 1511g by bolts for sliding cooperation with the four sides of the guide column 1511f, which is easy to replace when worn.

[0048] When loading materials from the external double-inlet double-outlet rack, the trolley body 1100 first moves to the front of the external rack. Then, the drive mechanism 1500 actuates, first driving the left and right rows of grippers to move above the two rows of carrier plates 4 on the external rack and lower them, so that the two latching pieces 1410 of the grippers extend downwards into the two latching holes 41 on the rear side of the corresponding carrier plate 4 (i.e., the grippers grasp the gripping part). See [reference needed]. Figure 7Then, each gripper is driven to move horizontally backward, thereby simultaneously pulling the two rows of carrier plates 4 on the outer material rack into the two material racks 1200. Similarly, the two rows of carrier plates 4 on the two material racks 1200 can also be horizontally pushed onto the double-inlet double-outlet press, and the process is similar to the above process, so it will not be described in detail here.

[0049] As can be seen from the above, the beneficial effects of the double-in, double-out loading and unloading trolley provided in this embodiment of the present invention are as follows:

[0050] 1. Improve production efficiency: By setting up two material racks arranged on the left and right and two corresponding push arms, a "double in and double out" loading and unloading operation mode is realized, which can simultaneously transfer two rows of products. It is compatible with double in and double out material racks and presses, effectively increasing the material handling capacity of a single operation, significantly improving production efficiency, and meeting the needs of large-scale mass production.

[0051] 2. Reduced Wear Risk: The innovatively designed guide and limiting mechanism uses horizontally arranged bearings to clamp and guide both sides of the central track, replacing the traditional limiting method that relies on the C-groove of the wheel and its engagement with the track. The rolling friction between the bearings and the track reduces contact wear, while the adjustment structure of the eccentric shaft and locking nut allows for precise calibration of the alignment between the wheels and the track, preventing abnormal friction caused by shaking. Especially in double-row material handling scenarios, where the overall weight of the trolley increases, this guide and limiting mechanism effectively suppresses wear and extends the equipment's service life.

[0052] 3. Enhanced operational stability: The guide and limit mechanism provides stable guidance through the bearings on both sides of the middle track during the trolley's operation, strictly limiting the wheels to the corresponding travel track, effectively suppressing lateral swaying, ensuring the smooth operation of the trolley when carrying double rows of materials, and reducing the risk of positioning deviation during material transfer.

[0053] 4. Compact structure and convenient adjustment: The bearing, eccentric shaft and locking nut of the guide limit mechanism are integrated under the mounting plate, which is compact and occupies little space; the bearing clamping force can be adjusted by rotating the shaft by loosening the locking nut, and the locking nut can be fixed after completion. The operation is convenient and facilitates the installation, debugging and later maintenance of the equipment.

[0054] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A double-in, double-out loading and unloading trolley, comprising a trolley body, a material rack for horizontally placing multiple layers of material-bearing plates at equal vertical and horizontal intervals, a push arm for lowering so that its front-end multi-layer grippers respectively grasp the corresponding rear-side gripping parts of the material plates and horizontally push the material plates forward or horizontally pull them into the material rack, and a drive mechanism for driving the push arm to lift and move horizontally back and forth, wherein the bottom of the trolley body has multiple wheels for horizontal movement of the trolley on two spaced-apart tracks, and the material rack and drive mechanism are fixed to the trolley body, characterized in that, The number of material racks is two, arranged left and right. The number of push arms is two, corresponding one-to-one with the two material racks. The two push arms are connected to the drive mechanism. The bottom of the trolley body also has at least one guide limiting mechanism for guiding and limiting the trolley body. The guide limiting mechanism includes a horizontal mounting plate and at least one pair of bearings for clamping the two sides of the intermediate track located parallel between the two travel tracks. Each bearing is horizontally arranged below the mounting plate and eccentrically fixed on a vertical rotating shaft. The rotating shaft is rotatably connected to the mounting plate and has an upper section and a lower section located on the upper and lower sides of the mounting plate, respectively. The upper section is threaded with a locking nut, and the lower section has an expansion portion formed on its circumference for cooperating with the locking nut to clamp the mounting plate from top to bottom.

2. The double-in, double-out loading and unloading trolley according to claim 1, characterized in that, The trolley body has a frame, and the material rack includes two side plates arranged opposite to each other on the left and right sides. The two side plates are fixed to the frame. The opposite surfaces of the two side plates are provided with multi-layer support assemblies for supporting the left and right edges of the carrier plate. Each layer of support assembly includes multiple support rollers arranged at intervals in front and behind.

3. The dual in-dual out load handling vehicle of claim 2, wherein, The push arm includes multiple horizontal plates in the left-right direction, which are arranged vertically at intervals. The number of horizontal plates is the same as the number of layers of the gripper. Each horizontal plate has two vertical plates arranged horizontally at intervals on its rear side. The rear end of the vertical plates is connected to the drive mechanism. The gripper includes two fasteners that are symmetrically fixed to the front side of the corresponding horizontal plate. The lower edge of the fasteners is lower than the lower edge of the horizontal plate.

4. The dual in-dual out load handling vehicle of claim 2, wherein, The drive mechanism includes two drive units, left and right. Each drive unit includes a front-to-back horizontal drive module and a lifting module. The front-to-back horizontal drive module is fixed on the frame and has a sliding seat that moves horizontally back and forth under the drive of the module. The front of the sliding seat has a guide post. The lifting module is fixed on the top of the guide post and has a lifting frame that moves up and down under the drive of the module. The lifting frame slides up and down with the guide post and is connected to the push arm on the same side.

5. The dual in-dual out load handling vehicle of claim 2, wherein, The trolley body also has a maintenance ladder located on one side of the frame.

6. The dual in-dual out load handling vehicle of claim 1, wherein, The wheels are flat wheels that only make contact with the corresponding track.

7. The dual in-dual out load handling vehicle of claim 1, wherein, Each wheel is fixed to the trolley body by a wheel frame, and each wheel frame has a limit hook that hooks onto the outer side of the corresponding travel track.

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