Trolley

Abstract

A trolley belongs to the field of transportation tools. It includes a frame, a cargo end support, a child seat, a seat accessory and a running device, wherein the running device is connected to the frame, the cargo end support is arranged above the frame and connected to the frame, the child seat is connected to the frame, and the seat accessory is used to be connected to the frame. When a child sits on the child seat, the safety of the child sitting can be improved with the help of the seat accessory, and the safety is high.

Description

Technical Field

[0001] The invention relates to the technical field of transportation tools, and in particular to a drawbar vehicle. Background Art

[0002] During the journey, pedestrians usually use trolley cases or carts to drag their belongings to save effort. However, when traveling with infants, they also need to pull the infants to prevent them from getting separated. In this way, an adult needs to pull the cart with one hand and the infant with the other hand, or carry the infant on his back. In addition to being inconvenient to take care of the infant, it is also difficult to observe the road conditions.

[0003] Patent document CN205469145U records a multifunctional handcart, including a main body and a cargo plate fixed at the bottom of the main body, a main wheel is provided at the connection between the main body and the cargo plate, a secondary wheel is provided at the end of the cargo plate, and a rotating first seat and a second seat are provided on the main body, and the first seat and the second seat are locked after rotating in one direction at a certain angle. The seat designed for this handcart is only suitable for the stationary state. In the pulling state, part of the weight on the first seat and the second seat is transferred to the main wheel, and part is borne by the user's hands, which is inconvenient for long-term use. In addition, even if infants and young children can sit on the tilted first seat or second seat, there are safety hazards. Summary of the invention

[0004] The object of the present invention is to provide a trolley which is suitable for carrying infants and heavy objects at the same time.

[0005] The present invention is achieved in that:

[0006] A trolley comprises a frame, a cargo end support, a child seat, a seat accessory and a running device, wherein the running device is connected to the frame, the cargo end support is arranged above the frame and connected to the frame, the child seat is connected to the frame, and the seat accessory is used to be connected to the frame.

[0007] Furthermore, the running device includes a main load-bearing wheel group and a secondary load-bearing wheel group, the main load-bearing wheel group is arranged at the rear end of the frame and is rotatably connected to the frame, the secondary load-bearing wheel group includes a force transmission member, a wheel frame and at least two secondary load-bearing wheels, one end of the force transmission member is rotatably connected to the wheel frame, two or more secondary load-bearing wheels are respectively arranged on both sides of the rotating shaft of the wheel frame and the force transmission member, and two or more secondary load-bearing wheels are respectively rotatably connected to the wheel frame, the other end of the force transmission member is connected to the frame, and the connection between the force transmission member and the frame is arranged between the pulling end of the frame and the rear end of the frame.

[0008] Preferably, the force transmission member includes a vibration-damping expansion joint.

[0009] Preferably, the seat accessory comprises a restraint or an armrest.

[0010] Furthermore, it also includes a corner limiter, the other end of the force transmission member is rotatably connected to the frame, and the corner limiter is used to set the maximum rotation angle between the force transmission member and the rear end of the frame.

[0011] Preferably, it also includes a plurality of corner limiters respectively connected to the frame, the cargo end tray is rotatably connected to the frame, the child seat is rotatably connected to the frame, the seat accessory is a limit frame, the limit frame is rotatably connected to the frame, and the plurality of corner limiters are respectively used to limit the angles of the cargo end tray, the child seat and the frame.

[0012] Furthermore, the corner limiter includes a fixed arm, a load-bearing arm and a pulling arm, the fixed arm is provided with a pulling arm limiting portion, the first end of the pulling arm is rotatably connected to the first end of the load-bearing arm, the second end of the load-bearing arm is rotatably connected to the fixed arm, and the second end of the pulling arm moves within the pulling arm limiting portion for adjusting the distance between the second end of the pulling arm and the second end of the load-bearing arm.

[0013] Furthermore, the tension arm limiting portion is a guide groove, and the guide groove is provided with an opening for separating the tension arm and the fixed arm. The corner limiting component also includes connecting parts at both ends of the opening, and the connecting parts at both ends of the opening are detachably connected to the fixed arm.

[0014] Furthermore, the distance between the cargo end support and the rotation axis of the frame, and the distance between the child seat and the rotation axis of the frame is greater than the maximum rotation radius of the cargo end support; the distance between the cargo end support and the rotation axis of the frame, and the distance between the child seat and the rotation axis of the frame is greater than the maximum rotation radius of the child seat; the distance between the child seat and the rotation axis of the frame, and the distance between the seat accessory and the rotation axis of the frame is greater than the maximum rotation radius of the child seat.

[0015] The beneficial effects of the present invention include:

[0016] 1. By adding child seats and seat accessories, the safety of children sitting in the child seats can be improved with the help of seat accessories, which is very safe.

[0017] 2. When there are children on the trolley, its center of gravity shifts to the hand-pulling end, which has a strong pulling effect on the user's hands. The secondary load-bearing wheel group cooperates with the main load-bearing wheel group to reduce the pulling strength of the trolley on the user's hands, making it easy to use.

[0018] 3. The vibration-damping retractor can provide appropriate support force and reduce the swing amplitude of the trolley when the user walks.

[0019] 4. The corner limiter makes it easy to fold the cargo end tray, child seat, and seat accessories, reducing the space occupied when the trolley is placed.

[0020] 5. By arranging an opening for separating the tension arm and the fixed arm on the guide groove, the load-bearing arm can be freed from the limit of the tension arm limiter when necessary, so that the cargo end tray, child seat or seat accessory connected to the tension arm can adjust the rotation direction as needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The figure is a front view of a drawbar vehicle of the present invention.

[0022] Figure 2 for Figure 1 AA section view.

[0023] Figure 3 This is a reference diagram of the use status of the pull-bar vehicle of the present invention.

[0024] Figure 4 for Figure 3 The schematic diagram shown is a trolley passing through a rough road.

[0025] Figure 5 for Figure 4 Enlarged view of part B.

[0026] Figure 6 This is one of the reference diagrams of the use status of another type of the trolley of the present invention.

[0027] Figure 7 for Figure 6 A usage state of the drawbar vehicle is shown in reference figure 2.

[0028] Figure 8 The present invention is a front view of a corner stopper of a trolley.

[0029] Fig. 9 for Figure 8 A cross-sectional view of a corner stop is shown.

[0030] Fig.10 for Figure 8 The reference figure of the corner limiter in use is shown.

[0031] Description of the accompanying drawings: 110-first tie rod, 111-second tie rod, 112-handle rod, 113-force transmission member, 120-first connecting rod, 121-first corner limiting member, 122-second connecting rod, 130-third connecting rod, 131-fourth connecting rod, 132-fifth connecting rod, 133-sixth connecting rod, 134-seventh connecting rod, 21-cargo end support, 31-child seat, 32-seat accessories, 321-limiting frame sleeve, 322-limiting frame, 41-main load-bearing wheel group, 42-secondary load-bearing wheel group, 420-wheel frame, 421-first load-bearing wheel, 422-second load-bearing wheel, 51-fixed arm, 51 0-connecting plate part, 5101-mounting hole, 511-vertical plate part, 5111-tension arm limiting part, 5112-opening, 5113-pin hole, 5114-pin hole, 5115-third connecting shaft accommodating groove, 52-load-bearing arm, 520-connecting plate part, 5201-mounting hole, 521-vertical plate part, 53-tension arm, 54-corner lock, 540-first connecting shaft, 541-lock, 542-torsion spring, 56-connecting parts at both ends of the opening, 560-connecting block, 561-connecting pin, 562-elastic pin clamp, 571-second connecting shaft, 572-third connecting shaft, 573-fourth connecting shaft. DETAILED DESCRIPTION

[0032] The present invention is described in the form of embodiments in conjunction with the accompanying drawings to assist those skilled in the art in understanding and implementing the present invention. Unless otherwise specified, the following embodiments and the technical terms therein should not be understood without departing from the technical knowledge background of the technical field.

[0033] In the present invention, one end of the rod is relative to the other end, and does not necessarily refer to the end of the rod, but a position away from the other end selected according to structural requirements.

[0034] The trolley of the present invention comprises a frame, a cargo end support, a child seat, a seat accessory and a running device, wherein the running device is connected to the frame, the cargo end support is arranged above the frame and connected to the frame, and the frame, the running device and the cargo end support can all adopt the existing trolley structure. When the frame is inclined, the lower stopper for preventing the cargo on the frame from sliding down belongs to the cargo end support, and of course, the cargo end support can also include side stoppers for preventing the cargo from sliding down from both sides of the frame.

[0035] The improvement of the present invention is that a child seat and a seat accessory are added to the pull rod vehicle. The child seat is connected to the vehicle frame. When in use, the child sits on the child seat, and the seat accessory is used to improve riding safety.

[0036] Seat accessories can be restraining parts such as seat belts, limit frames, or armrests.

[0037] Generally, the common function of a trolley is to pull cargo. Therefore, when the frame is tilted, the cargo tray is preferably set below the child seat. In addition, it is generally assumed that the cargo is heavier than the child, so the cargo tray and the child seat on the frame are also set in the same position. Another point is that when the cargo tray is set below the child seat, when the child sits on the child seat, the distance between the child seat and the cargo tray is also suitable for the child's legs to stretch.

[0038] Another improvement of the present invention is that the running device includes a main load-bearing wheel group and a secondary load-bearing wheel group, the main load-bearing wheel group is arranged at the rear end of the frame and is rotatably connected to the frame, the secondary load-bearing wheel group includes a force transmission member, a wheel frame and at least two secondary load-bearing wheels, one end of the force transmission member is rotatably connected to the wheel frame, two or more secondary load-bearing wheels are respectively arranged on both sides of the rotating shaft of the wheel frame and the force transmission member, and the two or more secondary load-bearing wheels are respectively rotatably connected to the wheel frame, the other end of the force transmission member is connected to the frame, and the connection between the force transmission member and the frame is arranged between the pulling end of the frame and the rear end of the frame.

[0039] In the secondary load-bearing wheel set, two or more secondary load-bearing wheels are respectively arranged on both sides of the connecting shaft between the wheel frame and the force transmission member, so that the supporting force of the ground on the two or more secondary load-bearing wheels is respectively located on both sides of the connecting shaft between the wheel frame and the force transmission member, so that the two or more secondary load-bearing wheels installed on the wheel frame can contact with the ground to form one side of the three-strip shape, the force transmission member forms one side of the triangle, and the frame forms one side of the three-strip shape. In this way, the force transmission member can achieve a force transmission effect.

[0040] The force transmission member preferably includes a vibration-damping expansion joint, so that the vibration-damping expansion joint can adjust the length and smooth the vibration according to the falling force on the tension rod side.

[0041] The other end of the force transmission member is preferably connected to the frame in a rotatable manner. In this case, the drawbar vehicle of the present invention further includes an angle limiter, which is used to set the maximum rotation angle between the force transmission member and the rear end of the frame. The maximum rotation angle between the force transmission member and the rear end of the frame is set by the angle limiter, and the distance between the rotation axis of the force transmission member and the frame and the rotation axis of the main load-bearing wheel is determined. More than two secondary load-bearing wheel groups can contact the ground. In this way, the length of the vibration-damping telescopic device is adjusted by the force change of the pulling end of the drawbar vehicle, thereby reducing the pulling strength of the drawbar vehicle on the user's hand, and making it easy to use.

[0042] Below Figure 1-3 A drawbar vehicle is shown to explain the drawbar vehicle of the present invention in detail.

[0043] Figure 1-3 The illustrated drawbar vehicle comprises a vehicle frame, a cargo end support, a child seat, a seat accessory and a running device, wherein the running device comprises a main load-bearing wheel set 41 and a secondary load-bearing wheel set 42.

[0044] Among them, the frame is fixedly connected by two first pull rods 110 and multiple connecting rods. To facilitate adjusting the use length of the pull rod cart and shortening the placement length of the frame, each first pull rod 110 is also fixedly connected to a second pull rod 111. The second pull rod 111 is selected as a sleeve, and a pull rod 112 is inserted and connected to the corresponding hand-pulling end of the second pull rod 111. The pull rod 112 is a "C"-shaped frame, and both ends of the "C"-shaped frame are respectively inserted into the second pull rod 111. Elastic pins are provided on the two horizontal segments of the "C"-shaped frame, and multiple pin holes are provided on the axis of the second pull rod 111. By selecting the pin hole for the elastic pin to cooperate with the second pull rod 111, the length between the hand-pulling end and the tail end of the pull rod cart can be adjusted.

[0045] See Figure 2-3 , both ends of the first connecting rod 120, the second connecting rod 122, the third connecting rod 130, the fourth connecting rod 131, the fifth connecting rod 132, the sixth connecting rod 133, and the seventh connecting rod 134 are respectively fixedly connected to two second pull rods 111. Since the second pull rod 111 is fixedly connected to the first pull rod 110, it can also be understood that both ends of the connecting rod are respectively fixedly connected to the first pull rods 110 on both sides.

[0046] Among them, two groups of main load-bearing wheel sets 41 are respectively installed at the tail end of the frame, and each group of main load-bearing wheel sets 41 is rotationally connected to the frame.

[0047] Among them, the cargo end support 21 is arranged above the frame and is rotationally connected to the frame. Generally, during use, the cargo end support 21 is preferably at a 90° angle to the frame. Figure 1 A first corner limit member 121 is also fixedly connected to the tail end of the pull rod cart shown in Figure 8-10 , and the first corner limit member 121 adopts a limit plate, and the limit plate is perpendicularly welded to the first pull rod 110 on the first pull rod 110. Of course, the first corner limit member 121 can also adopt

[0048] Among them, the child seat 31 is arranged above the frame and is rotationally connected to the frame. To reduce the space occupied by the pull rod cart during placement, the distance between the rotation axis of the child seat 31 and the frame and the rotation axis of the cargo end support 21 and the frame preferably satisfies: when the child seat 31 is at a 90° angle to the frame, rotate the cargo end support 21, and the cargo end support 21 can be arranged between the two first pull rods 110. Generally, during use, the child seat 31 is preferably at a 90° angle to the frame, so the distance between the rotation axis of the child seat 31 and the frame and the rotation axis of the cargo end support 21 and the frame preferably also satisfies: when the child seat 31 is at a 90° angle to the frame and the cargo end support 21 is preferably at a 90° angle to the frame, a suitcase can be placed between the child seat 31 and the cargo end support 21.

[0049] When the child seat 31 is not in use, it is preferably arranged between the two first pull rods 110, so that the child seat 31 can also form an object holder. Refer to Figure 3 , the child seat 31 is preferably rotatably arranged between the two first pull rods 110 towards the handle end of the trolley, and can also be rotatably arranged between the two first pull rods 110 towards the tail end of the trolley. To meet this function, a second corner limit member (not shown) is also provided between the child seat 21 and the frame.

[0050] Figure 1-3 In the shown trolley, the seat accessory 32 is a limit frame, and the limit frame is a "C"-shaped frame. To reduce the space occupied by the trolley when placed, the seat accessory 32 is assembled by a limit frame sleeve 321 and a limit frame 322. The limit frame 322 is a "C"-shaped frame. The limit frame sleeve 321 is rotatably connected to the frame, and the two ends of the "C"-shaped frame are respectively inserted and connected into the two limit frame sleeves 321. Elastic pins are provided on the two cross sections of the "C"-shaped frame, and a plurality of pin holes are provided on the axis of the limit frame sleeve 321. By selecting the pin holes for the elastic pins to cooperate with the limit frame sleeve 321, the size of the restraint frame of the seat accessory 32 can be adjusted.

[0051] Generally, reminding the child to hold the seat accessory can prevent the child from slipping out of the seat accessory. Therefore, it is not necessary to set the rotation angle between the limit frame and the frame. However, to improve safety, a third corner limit member can also be provided between the limit frame sleeve 321 and the frame.

[0052] Among them, the secondary load-bearing wheel set 42 includes a force transmission member 113, a wheel frame 420, a first load-bearing wheel 421, and a second load-bearing wheel 422. Of course, the secondary load-bearing wheels in the secondary load-bearing wheel set 42 can also be more than three. The first load-bearing wheel 421 is rotatably connected to the wheel frame 420, the second load-bearing wheel 422 is rotatably connected to the wheel frame 420, one end of the force transmission member 113 is rotatably connected to the wheel frame 420, and the rotation axes of the wheel frame 420 and the first load-bearing wheel 421, and the rotation axes of the wheel frame 420 and the second load-bearing wheel 422 are respectively arranged on both sides of the rotation axis of the wheel frame 420 and the force transmission member 113. The other end of the force transmission member 113 is rotatably connected to the frame, and the connection point of the force transmission member 113 and the frame is arranged between the pulling end and the tail end of the frame. Generally, when a child is sitting on the trolley, the rotation axes of the force transmission member 113 and the frame, and the rotation axis of the main load-bearing wheel set 42 are preferably arranged on both sides of the center of gravity of the trolley.

[0053] The force transmission member 113 is a shock-absorbing telescopic device. At this time, the shock-absorbing telescopic device adopts a sleeve-type shock-absorbing structure, and a spring shock-absorbing structure or a hydraulic shock-absorbing structure can be arranged in the sleeve. These shock-absorbing telescopic devices can be seen on the front shock fork and shock-absorbing seat support of a mountain bike.

[0054] Refer to Figure 2When selecting the secondary load-bearing wheel set, it is best to make it able to be accommodated between the second pull rod 111 and the main load-bearing wheel set 41, so as to reduce the space occupied by the pull rod car when it is placed.

[0055] A fourth corner limiting member is preferably provided between the force transmission member 113 and the vehicle frame.

[0056] See also Figure 3 , the first connecting rod 120 is arranged below the rotation axis of the cargo end support 21 and the frame, which helps to enhance the strength of the frame. The second connecting rod 122 is arranged at a position that can support the cargo end support 21 that rotates counterclockwise, so that when the cargo end support 21 is arranged between the two first pull rods 110, the second connecting rod 122 can support the cargo end support 21. The third connecting rod 130 is arranged below the rotation axis of the child seat 31 and the frame, which helps to enhance the strength of the frame. The fourth connecting rod 131 is arranged at a position that can support the child seat 31 that rotates counterclockwise, and the fifth connecting rod 132 is arranged at a position that can support the child seat 31 that rotates clockwise, so that when the cargo end support 21 is arranged between the two first pull rods 110, one of the fourth connecting rod 131 and the fifth connecting rod 132 can support the child seat 32. The third connecting rod 130 is arranged below the rotation axis of the child seat 31 and the frame, which helps to enhance the strength of the frame. The sixth connecting rod 133 is arranged below the rotation axis of the limiting frame sleeve 321 and the frame, which helps to enhance the strength of the frame. The seventh connecting rod 134 is arranged at a position that can support the seat auxiliary component 32 that rotates counterclockwise, so that when the seat auxiliary component 32 is arranged between the two first pull rods 110, the seventh connecting rod 134 can support the seat auxiliary component 32.

[0057] Figure 8-10 A corner stopper is shown. It includes a fixed arm 51, a load-bearing arm 52 and a tension arm 53, and a tension arm stopper 5111 is provided on the fixed arm 51. The first end of the tension arm 53 is connected to the first end of the load-bearing arm 52 in a rotational pair, and the third connecting shaft 572 is the rotational axis of the tension arm 53 and the load-bearing arm 52. The second end of the load-bearing arm 52 is connected to the fixed arm 51 in a rotational pair, and the fourth connecting shaft 573 is the rotational axis of the load-bearing arm 52 and the fixed arm 51. The second end of the tension arm 53 moves in the tension arm stopper 5111, and is used to adjust the distance between the second end of the tension arm 53 and the second end of the load-bearing arm 52.

[0058] The tension arm limiting portion 5111 is a guide groove, and the second end of the tension arm 53 is fixedly connected to the second connecting shaft 571, and the second connecting shaft 571 moves in the guide groove, thereby adjusting the distance between the second end of the tension arm 53 and the second end of the load-bearing arm 52. Fig.10 A third connecting shaft accommodating groove 5115 is also provided on the fixed arm 51, so that the angle between the load-bearing arm 52 and the fixed arm 51 can be adjusted between 0° and 90°.

[0059] In order to adjust the angle between the load-bearing arm 52 and the fixed arm 51 between 0° and 180°, and to lock the angle between the load-bearing arm 52 and the fixed arm 51 at a certain angle, such as 90°, an opening 5112 for separating the pulling arm 53 and the fixed arm 51 may be provided on the guide groove 5111. With the help of the opening 5112, the second connecting shaft 571 can be removed from the guide groove, so that the pulling arm limiting portion 5111 loses its limiting effect on the second connecting shaft 571.

[0060] In order to enhance the structural strength of the vertical plate portion 511 on both sides of the opening 5112, the corner stopper also includes connecting parts 56 at both ends of the opening, and the connecting parts 56 at both ends of the opening are detachably connected to the vertical plate portions 511 on both sides of the opening 5112. Specifically, the connecting parts 56 at both ends of the opening include a connecting block 560, a connecting pin 561 and an elastic pin clamp 562. Pin holes 5113 and pin holes 5114 are respectively provided on the vertical plate portions 511 on both sides of the opening. When in use, four connecting pins are used to connect the vertical plate portion 511 and the connecting block 560, and the elastic pin clamp 562 is clamped at the pin head of the connecting pin 561 to prevent the connecting pin 561 from falling off from the pin holes of the vertical plate portion 511 and the connecting block 560.

[0061] See also Figure 8-10 , a corner lock 54 is also installed on the vertical plate portion 511, and the corner lock 54 includes a first connecting shaft 540, a latch 541, and a torsion spring 542. The latch 541 and the torsion spring 542 are both mounted on the first connecting shaft 540, and the first connecting shaft 540 is installed on the vertical plate portion 511. The two levers of the torsion spring 542 are respectively against the latch 541 and the connecting plate portion 510, see Fig.10 When the angle between the load-bearing arm 52 and the fixed arm 51 is set at 90°, the angle lock 54 cooperates with the tension arm limiting portion 5111 to limit the second connecting shaft 572. After pressing the angle lock 54, the limit of the second connecting shaft 572 by the lock 541 can be opened.

[0062] See also Figure 3 ,application Figure 8-10 When the corner stopper shown is the first corner stopper, the tension arm stopper 5111 should be arranged on the left side of the cargo end support 21, the fixed arm 51 is fixedly connected to the vehicle frame, and the cargo end support 21 is fixedly connected to the load-bearing arm 52. Application Figure 8-10When the corner limiter shown is the second corner limiter, the tension arm limiter 5111 should be set on the left side of the child seat 31, the fixed arm 51 is fixedly connected to the frame, and the child seat 31 is fixedly connected to the load-bearing arm 52. At this time, in order to facilitate the restraint of the child seat 31, the lower end of the fixed arm 51 is preferably extended to the right side of the child seat 31, and a tension arm limiter with an opening is also provided on this side. In this way, the angle between the load-bearing arm 52 and the fixed arm 51 can be adjusted between 0° and 180°, and the angle between the load-bearing arm 52 and the fixed arm 51 can be locked at a certain angle. Application Figure 8-10 When the corner limiter shown is the third corner limiter, the tension arm limiter 5111 should be arranged on the left side of the limit frame sleeve 321, the fixed arm 51 is fixedly connected to the frame, and the limit frame sleeve 321 is fixedly connected to the load-bearing arm 52. Application Figure 8-10 When the corner limiter shown is the fourth corner limiter, the tension arm limiter 5111 should be arranged on the right side of the force transmission member 113 , the fixed arm 51 is fixedly connected to the frame, and the force transmission member 113 is fixedly connected to the load-bearing arm 52 .

[0063] See also Figure 4-5 ,use Figure 8-10 After the angle limiter is set to the angle between the force transmission member 113 and the frame, a circle is drawn with the rotation axis of the wheel frame 420 and the force transmission member 113 as the center and the lower tangent of the first load-bearing wheel 421 and the second load-bearing wheel 422 on the wheel frame 420 as the tangent (corresponding to Figure 5 See also Figure 5 , when the second load-bearing wheel 422 falls on the slope, the lowest point of the double-dotted circle is lower than the highest point of the slope. In other words, when the trolley passes through a bumpy road, the change in the height difference of the hand-pull end is lower than when the secondary load-bearing wheel group only includes one secondary load-bearing wheel. Correspondingly, the effect of the height difference on the user's hand is smaller, that is, under the support of the secondary load-bearing wheel group, the feeling of falling and pulling on the user's hand by the hand-pull end is smaller. It should be understood that even if the force transmission member 113 adopts a vibration-damping retractor, the first load-bearing wheel 421 and the second load-bearing wheel 422 will still be in contact with the ground, and the force transmission member can still play the role of transmitting the relevant supporting force. After the force transmission member 113 adopts a vibration-damping retractor, when the height difference of the hand-pull end changes, the vibration-damping retractor can also provide a buffering force to reduce the bumpy feeling of children riding on the trolley.

[0064] Figure 6-7 Another kind of drawbar vehicle is shown. Figure 1-3 The drawbar truck shown differs in that Figure 7When the cargo end support 21 of the trolley is set at an angle of 90° with the frame, the tangent lines of the cargo end support 21, the second connecting rod 122 and the main load-bearing wheel set 41 are coplanar, so that the ground can stably support the upright frame. At this time, the child seat 31 is adjusted so that the child seat 31 of the trolley is set at an angle of 90° with the frame, so that the child can sit on the child seat 31.

[0065] Figure 6-7 Another kind of drawbar vehicle shown is Figure 1-3 Another difference of the drawbar vehicle shown is that Figure 1-3 The seat accessory of the illustrated trolley is an armrest, that is, only the limiting frame sleeve 321 is retained, and the limiting frame sleeve forms the armrest.

[0066] The present invention is described in detail above with reference to the accompanying drawings and embodiments. It should be understood that it is impossible to exhaustively describe all possible implementation methods in practice, and the inventive concept of the present invention is described as much as possible by way of example. Without departing from the inventive concept of the present invention and without creative work, the technical personnel in this technical field make selections and combinations of the technical features in the above embodiments, experimental changes to the specific parameters, or use the prior art in this technical field to conventionally replace the technical means disclosed in the present invention to form specific embodiments, which should all belong to the implicit disclosure of the present invention.

Claims

1. A trolley, comprising a frame, a cargo end support, and a running device, wherein the running device is connected to the frame, the cargo end support is arranged above the frame and connected to the frame, and is characterized in that: It also includes a child seat and a seat accessory, wherein the child seat is connected to the frame, and the seat accessory is used to be connected to the frame. It also includes a plurality of corner stoppers respectively connected to the frame, the cargo end support is rotatably connected to the frame, the child seat is rotatably connected to the frame, the seat auxiliary is a stop frame, the stop frame is rotatably connected to the frame, and the plurality of corner stoppers are respectively used to limit the corners of the cargo end support, the child seat and the frame. The corner limiter comprises a fixed arm, a load-bearing arm and a pulling arm, the fixed arm is provided with a pulling arm limiting part, the first end of the pulling arm is rotatably connected to the first end of the load-bearing arm, the second end of the load-bearing arm is rotatably connected to the fixed arm, the second end of the pulling arm moves in the pulling arm limiting part, for adjusting the distance between the second end of the pulling arm and the second end of the load-bearing arm, the pulling arm limiting part is a guide groove, the guide groove is provided with an opening for separating the pulling arm from the fixed arm, the corner limiter also comprises connecting parts at both ends of the opening, the connecting parts at both ends of the opening are detachably connected to the fixed arm, the second end of the pulling arm is fixedly connected with a second connecting shaft, The second connecting shaft moves in the guide groove, so as to adjust the distance between the second end of the tension arm and the second end of the load-bearing arm. The second connecting shaft can be taken out of the guide groove through the opening. The connecting parts at both ends of the opening include a connecting block, a connecting pin and an elastic pin clamp. Pin holes are respectively arranged on the vertical plate parts on both sides of the opening. When in use, four connecting pins are used to connect the vertical plate part and the connecting block, and the elastic pin clamp is clamped at the pin head of the connecting pin to prevent the connecting pin from falling off from the pin holes of the vertical plate part and the connecting block. An angle lock is also installed on the vertical plate part. The angle lock includes a first connecting shaft, a lock, and a torsion spring. The lock and the torsion spring are all mounted on the first connecting shaft. The first connecting shaft is installed on the vertical plate part, and the two levers of the torsion spring respectively abut the lock and the connecting plate part.

2. The trolley according to claim 1, characterized in that: The running device includes a main load-bearing wheel group and a secondary load-bearing wheel group, the main load-bearing wheel group is arranged at the rear end of the frame and is rotatably connected to the frame, the secondary load-bearing wheel group includes a force transmission member, a wheel frame and at least two secondary load-bearing wheels, one end of the force transmission member is rotatably connected to the wheel frame, two or more secondary load-bearing wheels are respectively arranged on both sides of the rotating shaft of the wheel frame and the force transmission member, and two or more secondary load-bearing wheels are respectively rotatably connected to the wheel frame, the other end of the force transmission member is connected to the frame, and the connection between the force transmission member and the frame is arranged between the pulling end of the frame and the rear end of the frame.

3. The trolley according to claim 2, characterized in that: The force transmission member includes a vibration-damping expander.

4. The trolley according to claim 3, characterized in that: It also includes a corner limiting member, the other end of the force transmission member is rotatably connected to the frame, and the corner limiting member is used to set the maximum rotation angle between the force transmission member and the rear end of the frame.

5. The trolley according to claim 1, characterized in that: The distance between the cargo end tray and the rotation axis of the frame, and the distance between the child seat and the rotation axis of the frame is greater than the maximum rotation radius of the cargo end tray; the distance between the cargo end tray and the rotation axis of the frame, and the distance between the child seat and the rotation axis of the frame is greater than the maximum rotation radius of the child seat; the distance between the child seat and the rotation axis of the frame, and the distance between the seat accessory and the rotation axis of the frame is greater than the maximum rotation radius of the child seat.

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