Combined trolley

Abstract

The utility model discloses a combined trolley which comprises a single trolley, a left roller and a right roller are mounted at the bottom of a frame of the single trolley through wheel shafts, more than two trolleys are arranged side by side in a left-right mode, and the frames of the adjacent trolleys are connected through more than two detachable frame connecting pieces in front and back to form a combined trolley. Or more than two trolleys are arranged side by side left and right, the wheel axles of the adjacent trolleys are connected through detachable wheel axle connecting pieces, and the frames of the adjacent trolleys are connected through more than one detachable frame connecting piece to form the composite trolley. According to the combined trolley, the single trolleys can be quickly assembled into the combined trolley to carry a plurality of objects, and the combined trolley can be quickly separated into the single trolleys to independently carry the single trolleys.

Description

Technical Field

[0001] The utility model relates to a trolley, in particular to a combined trolley. Background Art

[0002] In some specific occasions, two trolleys need to be used in combination side by side. For example, in oxygen cutting operations, a trolley connected side by side is required to transport a gas cylinder and an oxygen cylinder to the operation point.

[0003] For example, in the utility model "Safety Oxygen Cylinder and Acetylene Cylinder Trolley" with authorization announcement number CN203450148U, in its technical solution, the detachable connecting parts include two pairs of hooks and hanging grooves respectively arranged on adjacent frames.

[0004] Another example is the utility model "Gas Cylinder Combination Trolley" with authorization announcement number CN203047321 U. In its technical solution, a detachable connecting part is provided between the first side of the first vehicle plate and the first side of the second vehicle plate. Specifically: a pin hole plate is provided horizontally extending outward from the first side of the first vehicle plate, a pin hole is opened on the first side of the second vehicle plate, the pin hole plate is placed on the first side of the second vehicle plate, and a detachable connection is achieved by the cooperation of a pin with the pin hole plate and the pin hole.

[0005] Another example is the utility model "Oxygen Cylinder and Acetylene Cylinder Trolley Short-Distance Transport Connection Device" with authorization announcement number CN212354104U. In its technical solution, a first limit rod, a first fixed block, a limit block, a pressing rod and a first spring are set, and the first limit rod and the limit block cooperate with each other, so that the first limit rod can be firmly fixed inside the first fixed block, so that the first connecting rod and the second connecting rod can be firmly spliced ​​together, thereby increasing the firmness of the structure and making it convenient for the staff to splice the first trolley and the second trolley together. Utility Model Content

[0006] The technical problem to be solved by the utility model is to propose a combined cart which is different from the existing connection technology.

[0007] A combined trolley capable of solving the above technical problems includes a single trolley, the bottom of the frame of the single trolley is provided with left and right rollers through a wheel axle, and the difference is that:

[0008] 1. Two or more trolleys are arranged side by side on the left and right, and the frames of adjacent trolleys are connected by two or more detachable frame connectors at the front and rear to form a composite trolley.

[0009] 2. Or two or more trolleys are arranged side by side on the left and right, the axles of adjacent trolleys are connected by detachable axle connectors, and the frames of adjacent trolleys are connected by one or more detachable frame connectors, thereby forming a composite trolley.

[0010] A structure of a frame connecting member I includes left and right connecting ears and a connecting arm I, each connecting ear includes an ear groove formed by front and rear side panels and a top plate, each connecting ear is welded to the frame of the corresponding cart, the left and right arm ends of the connecting arm I are respectively arranged in the left and right ear grooves and are hinged by a pin passing through the front, the angle between the axis of the pin and the walking surface is greater than or equal to 0° and less than 90°, and the top plate is shorter than the front and rear side panels to form an avoidance opening that allows the connecting arm I to rotate upward.

[0011] Another structure of the frame connecting member I includes left and right ring ears and a connecting arm II. The left and right ring ears are placed in the forks at the left and right ends of the connecting arm II. The forks are provided with pin holes coaxial with the center holes of the ring ears. A pin is forwardly passed through the two pin holes and the center hole to hinge the fork head with the ring ears. The angle between the axis of the pin and the walking surface is greater than or equal to 0° and less than 90°.

[0012] Another structure of a frame connecting part II includes left and right swing arms I and II, wherein the swing arm I includes a grooved tube welded on the sleeve I, the sleeve I is rotatably fitted on the clamping sleeve I and axially limited by upper and lower clamping rings, and the clamping sleeve I is tightly mounted on the frame I; the swing arm II includes a square tube welded on the sleeve II, the sleeve II is rotatably fitted on the clamping sleeve II and axially limited by upper and lower clamping rings, and the clamping sleeve II is tightly mounted on the frame II, the square tube and the grooved tube are rotated towards each other to place the square tube in the notch of the grooved tube, and the grooved tube is slidably fitted with left and right square hoops corresponding to the square tube, and each square hoop is screwed with a stop pin for locking the grooved tube and the square tube.

[0013] A structure of a wheel axle connecting member I comprises a nut seat I and a nut seat II which are screwed on the left and right wheel axle ends respectively, each nut seat is penetrated by a latch I which limits the screwing position, the end of the nut seat I is provided with a forward and backward circular embedding hole, the rear end of the circular embedding hole is an inlet and the front end is closed, and a pin hole which passes through the circular embedding hole is provided on the nut seat I at the inlet end; the end of the nut seat II is provided with a forward and backward circular embedding column, the circular embedding column is embedded in the circular embedding hole from the inlet, and the latch II is inserted in the pin hole to limit the embedding position.

[0014] Another structure of a wheel axle connecting member II includes nuts I and II respectively screwed onto the ends of the left and right wheel axles, each nut is provided with a pin III for limiting the screwing position, and "U"-shaped plates I and "U"-shaped plates II are respectively welded onto the opposite end faces of the nuts I and II, with the "U"-shaped opening of one "U"-shaped plate facing forward and the "U"-shaped opening of the other "U"-shaped plate facing backward, and the "U"-shaped plates I and "U"-shaped plates II are hooked with each other to achieve the connection between the left and right wheel axles.

[0015] The first type of the single wheelbarrow (such as a two-wheeled wheelbarrow) is that the front bottom of the frame is provided with left and right rollers via axles.

[0016] The second type of the single wheelbarrow (such as a four-wheeled wheelbarrow) is as follows: the front bottom of the frame is provided with left and right rollers via a wheel axle, and the rear bottom of the frame is provided with left and right universal wheels via a wheel frame.

[0017] The third type of the single trolley (such as a four-wheeled baby carriage or a four-wheeled disabled carriage) is as follows: left and right rollers are installed at the rear bottom of the frame through a wheel axle, and left and right universal wheels are installed at the front bottom of the wheel frame through a wheel frame.

[0018] Beneficial effects of the utility model:

[0019] 1. In the structure of a combined trolley of the utility model, multiple single trolleys can be placed adjacent to each other, and assembleable and disassembled connecting parts are provided between the frames on adjacent sides of each single trolley, so that the single trolleys can be quickly assembled into a combined trolley for carrying multiple objects, and the combined trolley can also be quickly separated into single trolleys for individual transportation.

[0020] 2. The utility model can quickly switch between a variety of conflicting usage scenarios, and has the performance of safety, speed, efficiency and easy control, which widely solves some difficulties and pain points in activities of using a trolley to carry goods. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an axonometric view of the first embodiment of the utility model.

[0022] Figure 2 for Figure 1 An exploded view of the first structure of the frame connecting member I in the implementation manner.

[0023] Figure 3 This is an axonometric view of the second embodiment of the present utility model.

[0024] Figure 4 for Figure 3 Axonometric view of the axle connection member I in an embodiment.

[0025] Figure 5 for Figure 4Exploded diagram.

[0026] Figure 6(a) shows Figure 5 Back view of middle nut seat I.

[0027] Figure 6(b) shows Figure 5 Back view of middle nut seat II.

[0028] Figure 7 This is an axonometric view of the third embodiment of the present utility model.

[0029] Figure 8 for Figure 7 Exploded view of the middle frame connection II.

[0030] Fig. 9 for Figure 8 The alignment structure diagram of some parts in the middle.

[0031] Fig.10 This is an axonometric view of the fourth embodiment of the present utility model.

[0032] Fig.11 for Fig.10 Exploded view of the middle wheel shaft connection II.

[0033] Fig.12 for Figure 1 A second structural schematic diagram of the frame connecting member I in the implementation manner.

[0034] Fig.13 for Fig.12 Exploded diagram.

[0035] Figure number identification: 1, frame; 2, roller; 3, axle; 4, front wheel frame; 5, universal wheel; 6, rear wheel frame; 7, connecting ear; 8, connecting arm Ⅰ; 9, latch; 10, rotating arm Ⅰ; 10-1, sleeve Ⅰ; 10-2, grooved tube; 11, rotating arm Ⅱ; 11-1, sleeve Ⅱ; 11-2, square tube; 12, ferrule Ⅰ; 13, snap ring; 14, ferrule Ⅱ; 15, square hoop; 16, stop pin; 17, nut seat Ⅰ; 18, nut seat Ⅱ; 19, latch Ⅰ; 20, round embedded hole; 21. Circular embedded column; 22. Pin hole; 23. Latch II; 24. Nut I; 25. Nut II; 26. Latch III; 27. "U"-shaped plate I; 28. "U"-shaped plate II; 29. ​​Frame connecting part I; 30. Frame connecting part II; 31. Axle connecting part I; 32. Axle connecting part II; 33. Reinforcing rib plate; 34. Marble; 35. Screw sleeve; 36. Notch; 37. Plate; 38. Screw hole; 39. Ear; 40. Connecting arm II; 41. Slot I; 42. Slot II. DETAILED DESCRIPTION

[0036] The technical solution of the utility model is further described below in conjunction with the implementation modes shown in the accompanying drawings.

[0037] Embodiment 1, as Figure 1 , Figure 2 shown.

[0038] The utility model discloses a combined cart, comprising two single carts arranged side by side, each single cart comprising a frame 1 inclined forward and downward (0°≤inclination angle<90°), left and right rollers 2 are mounted on a front wheel frame 4 at the front bottom of the frame 1 through a wheel axle 3, and left and right universal wheels 5 are mounted on a rear wheel frame 6 at the rear bottom of the frame 1, the frame 1 comprises left and right longitudinal beams (made of square tubes or round tubes), and front, middle and rear three cross beams (made of square tubes or round tubes) are welded between the left and right square tube longitudinal beams; the square tube longitudinal beams on the inner sides of the two frames 1 are connected through two front and rear detachable frame connectors Ⅰ29 to form a combined vehicle, the rear frame connector Ⅰ29 is arranged corresponding to the position of the rear wheel frame 6, and the front frame connector Ⅰ29 is arranged on the rear side of the front wheel frame 4.

[0039] Each frame connecting member Ⅰ29 includes a connecting ear 7 welded on the left and right square tube longitudinal beams and a square connecting arm Ⅰ8 arranged between the left and right connecting ears 7. A reinforcing rib plate 33 is welded between the bottom of each connecting ear 7 and the square tube longitudinal beam. Each connecting ear 7 includes a square groove formed by the front and rear side plates and the top plate. The notch of the square groove is perpendicular to the square tube longitudinal beam and downward. The outer end of each plate body is welded to the square tube longitudinal beam. The arm heads (cylindrical pin shape) at the left and right ends of the connecting arm Ⅰ8 are respectively arranged in the left and right ear grooves, and a handle with an arc knurling is provided. The latch 9 extends forward through the through holes of the front and rear side plates and the pin hole of the arm head to hinge the connecting arm Ⅰ8 with the connecting ear 7. The axis of the latch 9 is parallel to the square tube longitudinal beam and consistent with its inclination direction. The marble 34 at the front end of the latch 9 can prevent the pin body from falling off. The inner end of the top plate is shorter than the inner ends of the front and rear side plates to form an escape opening. When the combined vehicle passes through an uneven road surface, the arm end of the connecting arm Ⅰ8 can be rotated upward through the escape opening. Pulling out the latch 9 can release the hinge connection between the connecting arm Ⅰ8 and the connecting ear 7, thereby realizing the separation of the combined vehicle.

[0040] Embodiment 2, as Figure 3 , Figure 4 , Figure 5 , as shown in Figure 6(a) and Figure 6(b).

[0041] The difference between Example 2 and Example 1 is:

[0042] 1. The structure of the rear frame connector Ⅰ29 is slightly different.

[0043] 2. The wheel axle connector Ⅰ31 is used to replace the previous frame connector Ⅰ29, and the wheel axle connector Ⅰ31 realizes the connection between the left and right wheel axles 3.

[0044] In the structure of the frame connecting member Ⅰ29, the notch of the square groove of each connecting ear 7 is vertically downward instead of being perpendicular to the square tube longitudinal beam, and the axis of the pin 9 is horizontal.

[0045] The wheel axle connecting member Ⅰ31 includes a nut seat Ⅰ17 and a nut seat Ⅱ18, each nut seat is screwed and installed on the external threaded shaft end of the corresponding wheel axle 3 through a screw hole 38 opened on the outer seat body, and a through plug hole is opened on the outer seat body of each nut seat, and a plug pin Ⅰ19 is inserted in each plug hole, and the plug pin Ⅰ19 is embedded in a radial groove Ⅰ41 opened on the end surface of the external threaded shaft to limit the screwing position of the nut seat; the inner seat body of the nut seat Ⅰ17 is provided with a forward and backward circular embedding hole 20, the rear end of the circular embedding hole 20 is open as an inlet, and the front end of the circular embedding hole 20 is a closed stop, and a notch 36 that passes through the inner seat body is cut on the side of the circular embedding hole 20, and a pin hole 22 that passes through the circular embedding hole 20 is opened on the inner seat body corresponding to the inlet.

[0046] The inner seat body of the nut seat II 18 is connected with forward and backward circular embedded columns 21 through a plate 37. The circular embedded column 21 is embedded into the circular embedded hole 20 from the entrance (the plate 37 is matched in the groove 36) to realize the connection between the left and right wheel axles 3. The pin II 23 is inserted into the pin hole 22 to lock the position of the circular embedded column 21; after the pin II 23 is pulled out to unlock, the circular embedded column 21 withdraws from the circular embedded hole 20 from the entrance to separate the left and right wheel axles 3.

[0047] Embodiment 3, as Figure 7 , Figure 8 , Fig. 9 shown.

[0048] The difference between Example 3 and Example 1 is that:

[0049] 1. The structure of the frame 1 is different.

[0050] 2. Use frame connector II 30 to replace the previous frame connector I 29.

[0051] The longitudinal beam of the frame 1 is a round tube.

[0052] The frame connecting part II30 includes left and right swing arms I10 and swing arms II11. The swing arm I10 includes a grooved tube 10-2 welded on the sleeve I10-1 (the groove of the grooved tube 10-2 can be made by cutting a square tube). Two diagonal through holes I are provided on the grooved tube 10-2 at the bottom of the groove. The sleeve I10-1 is rotatably fitted on the clamping sleeve I12 and axially limited by the upper and lower clamping rings 13. The clamping sleeve I12 is tightly sleeved on the round tube longitudinal beam of the frame I. The swing arm II11 includes a grooved tube 10-2 welded on the sleeve II11-1 and can be fitted with a clamping sleeve I12. The square tube 11-2 in the slot is provided with through holes II respectively aligned with the two diagonal through holes I. The sleeve II 11-1 is rotatably fitted on the clamping sleeve II 14 and axially limited by the upper and lower clamping rings 13. The clamping sleeve II 14 is tightly clamped on the round tube longitudinal beam of the frame II. Two square hoops 15 are slidably mounted on the grooved tube 10-2. The tube wall of the end of the grooved tube 10-2 is turned outward to limit the slipping of the square hoop 15. A screw sleeve 35 is welded on each of the square hoops 15. A stop pin 16 that can enter the corresponding through hole I is screwed on the screw sleeve 35.

[0053] The square tube 11-2 and the groove tube 10-2 are rotated relative to each other to place the square tube 11-2 in the groove of the groove tube 10-2, and the positions of the left and right square hoops 15 are slidably adjusted on the groove tube 10-2, and the stop pins 16 on the square hoops 15 are tightened to lock the groove tube 10-2 and the square tube 11-2 in position; the stop pins 16 are loosened, and the left and right square hoops 15 are slid to one side to avoid the groove, and the square tube 11-2 is rotated out of the groove tube 10-2, thereby realizing the separation of the frame I and the frame II.

[0054] Embodiment 4, as Fig.10 , Fig.11 shown.

[0055] The difference between Example 4 and Example 2 is that:

[0056] 1. Use frame connector II 30 to replace frame connector I 29.

[0057] 2. Use axle connector II 32 to replace axle connector I 31.

[0058] The wheel axle connecting member II 32 comprises a nut I 24 and a nut II 25, each nut being screwed and installed on the externally threaded shaft end of the corresponding wheel axle 3, a plug pin III 26 being inserted in the insertion hole opened on each nut, and the plug pin III 26 being embedded in the radially opened slot 42 II on the end surface of the externally threaded shaft to limit the screwing position; a "U"-shaped plate I 27 and a "U"-shaped plate II 28 are respectively welded on the opposite end surfaces of the nut I 24 and the nut II 25, the "U"-shaped opening of one "U"-shaped plate faces forward and the "U"-shaped opening of the other "U"-shaped plate faces backward, the left and right frames 1 are pushed towards each other so that the "U"-shaped plate I 27 and the "U"-shaped plate II 28 are hooked with each other to realize the connection between the left and right wheel axles 3, and the left and right frames 1 are pushed away in the opposite direction so that the "U"-shaped plate I 27 and the "U"-shaped plate II 28 are disengaged to realize the separation of the left and right wheel axles 3.

[0059] Embodiment 5, as Fig.12 , Fig.13 shown.

[0060] Another structure of the frame connecting member I29 is:

[0061] It includes left and right ring ears 39 and connecting arms II 40. The left and right ring ears 39 are welded to the frame bodies adjacent to the left and right frames 1 and placed in the forks at the left and right ends of the connecting arms II 40. The forks are provided with pin holes coaxial with the center holes of the ring ears 39. A latch 9 is provided corresponding to each fork head. The latch 9 passes forward through the pin holes on the forks and through the center holes of the ring ears 39 to hinge the connecting arms II 40 with the ring ears 39. Pulling out the latch 9 separates the connecting arms II 40 from the ring ears 39.

[0062] By adjusting the welding angle of the ring ear 39 , the axis of the latch pin 9 can be made horizontal or consistent with the tilt direction of the frame 1 .

[0063] Comparison of the advantages and disadvantages of the utility model with the prior art:

[0064] In the prior art, the relative positions of the two vehicles are usually adjusted by moving the vehicles sideways so as to facilitate the insertion and extraction of the connecting parts for connection and disconnection. In particular, when the vehicles are heavily loaded with goods, it is more difficult to adjust the relative positions of the two vehicles by lifting and pulling them sideways. Unloading the goods to make them light and then connecting and disconnecting the connecting parts virtually adds multiple working procedures. In addition, in the connection technology of the prior art, the connection rigidity of the connecting parts is relatively strong. On uneven roads, it is not convenient for the two vehicles to adjust their postures with each other, which is easy to cause strong damage to the component structure.

[0065] By adopting the technical solution of the utility model, the vehicles can be conveniently moved longitudinally and obliquely, so as to adjust the relative positions of the two vehicles before connecting or disconnecting them; the connecting arm can be left alone on one vehicle when it does not play a connecting role and can hang down around the latch without tilting up and occupying space laterally, thereby reducing the width of the vehicle and avoiding scratching other objects; during the driving process of the two vehicles after being combined, each vehicle can rotate around the latch, and when traveling on an uneven road, the two vehicles can flexibly adjust their postures to each other to better adapt to different road conditions.

Claims

1. A combined trolley, comprising a single trolley, wherein the bottom of the frame (1) of the single trolley is provided with left and right rollers (2) via a wheel axle (3), characterized in that: Two or more trolleys are arranged side by side on the left and right, and the frames (1) of the adjacent trolleys are connected via two or more detachable frame connectors at the front and rear to form a composite trolley; Or two or more trolleys are arranged side by side on the left and right, the wheel axles (3) of adjacent trolleys are connected via a detachable wheel axle connector, and the frames (1) of adjacent trolleys are connected via one or more detachable frame connectors to form a composite trolley.

2. A combined trolley according to claim 1, characterized in that: The frame connecting member I (29) comprises left and right connecting ears (7) and a connecting arm I (8), each connecting ear (7) comprises an ear groove formed by front and rear side plates and a top plate, each connecting ear (7) is welded to the frame (1) of the corresponding trolley, the left and right arm ends of the connecting arm I (8) are respectively arranged in the left and right ear grooves and are hinged by a latch (9) passing through the front, the angle between the axis of the latch (9) and the walking surface is greater than or equal to 0° and less than 90°, and the top plate is shorter than the front and rear side plates to form an escape opening that allows the connecting arm I (8) to rotate upward.

3. A combined trolley according to claim 1, characterized in that: The frame connecting member II (30) comprises a left and a right rotating arm I (10) and a rotating arm II (11), wherein the rotating arm I (10) comprises a grooved tube (10-2) welded on the sleeve I (10-1), wherein the sleeve I (10-1) is rotatably fitted on the clamping sleeve I (12) and axially limited by upper and lower clamping rings (13), wherein the clamping sleeve I (12) is tightly sleeved on the frame I; the rotating arm II (11) comprises a square tube (11-2) welded on the sleeve II (11-1), wherein the sleeve II (11-1) is rotatably fitted on the clamping sleeve I (12) and axially limited by upper and lower clamping rings (13), wherein the clamping sleeve I (12) is tightly sleeved on the frame I; The clamping sleeve II (14) is fitted on the frame II and axially limited by upper and lower clamping rings (13). The clamping sleeve II (14) is tightly mounted on the frame II. The square tube (11-2) and the groove tube (10-2) are rotated in opposite directions so that the square tube (11-2) is placed in the groove of the groove tube (10-2). The groove tube (10-2) is slidably fitted with left and right square hoops (15) corresponding to the square tube (11-2). Each square hoop (15) is screwed with a stop pin (16) for locking the groove tube (10-2) and the square tube (11-2).

4. A combined trolley according to claim 1, characterized in that: The wheel axle connecting member I (31) comprises a nut seat I (17) and a nut seat II (18) respectively screwed on the shaft ends of the left and right wheel axles (3), each nut seat is provided with a latch I (19) for limiting the screwing position, the end of the nut seat I (17) is provided with a forward and backward circular embedding hole (20), the rear end of the circular embedding hole (20) is an inlet and the front end is closed, and a pin hole (22) penetrating the circular embedding hole (20) is provided on the nut seat I (17) at the inlet end; the end of the nut seat II (18) is provided with a forward and backward circular embedding column (21), the circular embedding column (21) is embedded in the circular embedding hole (20) from the inlet, and the latch II (23) is inserted into the pin hole (22) to limit the embedding position.

5. The combined trolley according to claim 1, characterized in that: The wheel axle connecting member II (32) comprises a nut I (24) and a nut II (25) respectively screwed on the shaft ends of the left and right wheel axles (3), each nut being provided with a latch III (26) for limiting the screwing position, and a "U"-shaped plate I (27) and a "U"-shaped plate II (28) are respectively welded on the opposite end surfaces of the nut I (24) and the nut II (25), the "U"-shaped opening of one "U"-shaped plate facing forward and the "U"-shaped opening of the other "U"-shaped plate facing backward, and the "U"-shaped plate I (27) and the "U"-shaped plate II (28) are hooked with each other to realize the connection between the left and right wheel axles (3).

6. The combined trolley according to claim 1, characterized in that: The frame connecting member I (29) comprises left and right ring ears (39) and a connecting arm II (40), wherein the left and right ring ears (39) are placed in the fork heads at the left and right ends of the connecting arm II (40), wherein the fork heads are provided with a pin hole coaxial with the center hole of the ring ears (39), and a latch pin (9) is inserted forward through the pin hole and the center hole to hinge the fork head with the ring ears (39), wherein the angle between the axis of the latch pin (9) and the walking surface is greater than or equal to 0° and less than 90°.

7. A combined trolley according to any one of claims 1 to 6, characterized in that: The front bottom of the frame (1) of the single trolley is provided with left and right rollers (2) via a wheel axle (3).

8. A combined trolley according to claim 7, characterized in that: The rear bottom of the vehicle frame (1) is provided with left and right universal wheels (5) via a wheel frame.

9. A combined trolley according to any one of claims 1 to 6, characterized in that: The rear bottom of the frame (1) of the single trolley is equipped with left and right rollers (2) via a wheel axle (3), and the front bottom of the frame (1) is equipped with left and right universal wheels (5) via a front wheel frame (4).

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