Brake control mechanism of luggage trolley and luggage trolley

Abstract

The utility model relates to a brake control mechanism of a luggage trolley and the luggage trolley, and relates to the technical field of transportation tools. The brake control mechanism comprises a brake connecting rod, a swing rod and a limiting block, one end of the brake connecting rod is connected with a handle of the luggage trolley, and a friction brake pad is arranged at the other end of the brake connecting rod; one end of the swing rod is hinged to a frame of the luggage trolley, and the other end of the swing rod is movably connected with the brake connecting rod. When the rear luggage trolley is inserted into the front luggage trolley, the limiting block on the rear luggage trolley can push the swing rod in the front luggage trolley to swing upwards and lift and drive the friction brake pad on the brake connecting rod to be away from the wheels of the luggage trolley. The utility model further discloses the luggage trolley with the brake control mechanism. According to the brake control mechanism and the luggage trolley, brake loosening can be conveniently and rapidly achieved, and a worker can conveniently push and transfer a plurality of luggage trolleys to designated positions at a time.

Description

Technical Field

[0001] The present application relates to the technical field of transportation vehicles, and in particular to a brake control mechanism of a luggage trolley and the luggage trolley. Background Art

[0002] Luggage trolleys are widely used in airports, stations, hotels, shopping malls and other places to temporarily carry luggage and goods for passengers or customers. They greatly bring convenience to people and are very popular.

[0003] In order to improve the safety of luggage trolleys, a braking system is usually installed on the luggage trolley, especially for luggage trolleys used in airports. A brake structure is usually provided on the frame, which is in a normal braking state. When in use, it is necessary to press the handle on the top of the frame to release the braking state of the brake structure; when the hand releases the handle, the brake pads of the brake structure will contact the wheel again under the action of the reset structure, forming a braking state to prevent the vehicle from slipping.

[0004] After being temporarily used by passengers or customers, luggage trolleys are often placed in various locations throughout airports, train stations, hotels, and shopping malls. Staff are then required to move these scattered trolleys to designated locations for easy access by subsequent passengers or customers. When moving multiple trolleys to designated locations, staff typically stack trolleys of the same structure one by one to form a stack, which is then towed or pushed as a whole to improve work efficiency.

[0005] At this time, since the staff can only directly contact the last luggage trolley, they can only release the brake of the last luggage trolley through the handle, while the brakes of the other luggage trolleys are still in the braking state. When towing or pushing the entire trolley, the wheels directly contact and rub against the ground, making towing or pushing very strenuous and also increasing wheel wear. The entire trolley set is very likely to tilt to the left or right, which is very dangerous. If additional fixings are used to fix the handles of each luggage trolley in turn to release the brakes, it will take a lot of time and be inconvenient to operate. Utility Model Content

[0006] In order to improve the convenience of staff in pushing and transporting luggage trolleys in a centralized manner, the present application provides a brake control mechanism for a luggage trolley and a luggage trolley.

[0007] In a first aspect, the present application provides a brake control mechanism for a luggage trolley adopting the following technical solution:

[0008] A brake control mechanism for a luggage trolley includes a brake link and a swing lever provided on a luggage trolley frame, wherein one end of the brake link is connected to a handle of the luggage trolley, and the other end of the brake link is provided with a friction brake pad for contacting a wheel of the luggage trolley;

[0009] One end of the swing link is hinged to the frame of the luggage trolley, and the other end of the swing link is movably connected to the brake link. When the swing link swings upward, it can drive the friction brake pad on the brake link away from the wheel of the luggage trolley;

[0010] The brake control mechanism further includes a limit block fixed on the chassis frame of the luggage trolley; when the chassis frame of the rear luggage trolley is inserted into the front luggage trolley, the limit block on the rear luggage trolley can push the swing rod in the front luggage trolley to swing upward.

[0011] The brake control mechanism in this application normally operates with the friction brake pads on the brake link resting against the wheels of the luggage trolley, creating a braking state. When in use, pressing the handle causes the brake link and friction brake pads to rise, disengaging from the wheels and releasing the braking state. When the handle is released, the brake link and friction brake pads return to their original position and re-establish the braking state. When staff are transferring and pushing multiple scattered luggage trolleys to a designated location, they can be stacked together to form a vehicle group, which can then be towed or pushed as a whole, improving work efficiency. In the present application, when the rear luggage trolley is inserted into the front luggage trolley, the limit block on the rear luggage trolley can contact the swing rod on the front luggage trolley. As the insertion goes deeper, the limit block can push the swing rod to swing upward, and the swing rod in turn drives the brake connecting rod and the friction brake pad to rise. When the friction brake pad on the brake connecting rod is away from the wheel of the luggage trolley, the brake state can be released. In this way, after the luggage trolleys in the group are pushed in and stacked together in sequence, the staff only needs to control the handle of the last luggage trolley to control the brakes of all the luggage trolleys.

[0012] By adopting the above technical solution, the brake control mechanism of the luggage trolley in this application can easily and quickly release the brake, thereby making it easier for staff to push and transfer multiple luggage trolleys to the designated location at one time, and the operation is convenient and reliable.

[0013] Optionally, the end of the swing arm is articulated with the brake connecting rod ball; or a waist-shaped hole is provided on the brake connecting rod, and the end of the swing arm is inserted into the waist-shaped hole.

[0014] By adopting the above technical solution, the swing arm drives the brake connecting rod to move linearly up and down when it swings, and the two will not get stuck, and the torque transmission is stable and reliable.

[0015] Optionally, the brake link includes a first vertical rod and a second vertical rod, the friction brake pad is fixedly connected to the lower end of the first vertical rod, and the first vertical rod is sleeved with a first elastic member for causing the friction brake pad on the brake link to abut against the wheel of the luggage trolley;

[0016] The lower end of the second upright pole is connected to the upper end of the first upright pole, and the second upright pole is sleeved with a second elastic member for resetting the handle of the luggage trolley.

[0017] By adopting the above technical solution, in the absence of external interference, the first elastic member can force the friction brake pad to press against the luggage trolley wheel, thereby maintaining a stable and reliable braking state. The second elastic member can promptly reset the handle of the luggage trolley, making it easier for users to operate and avoiding operational errors.

[0018] Optionally, a step surface is provided on the outer peripheral surface of the first vertical pole, the first elastic member is a coil spring sleeved on the first vertical pole, a limiting ring for being fixed to the luggage trolley frame is slidably sleeved on the first vertical pole, and the two ends of the first elastic member respectively abut against the step surface and the side surface of the limiting ring.

[0019] By adopting the above technical solution, the limiting ring can be fixed on the frame, playing a limiting and guiding role for the axial movement of the first vertical pole, ensuring the stability and reliability of its movement, and at the same time facilitating the installation of the first elastic member, so that it can work stably and reliably; the above structure has low cost and is stable and reliable.

[0020] Optionally, a limiting boss is provided on the outer peripheral surface of the second vertical pole, the second elastic member is a coil spring sleeved on the second vertical pole, a sliding rod for connecting to the handle of the luggage trolley is slidably sleeved on the second vertical pole, and the two ends of the second elastic member respectively abut against the side surface of the limiting boss and the end face of the sliding rod.

[0021] By adopting the above technical solution, the sliding rod plays a limiting and guiding role in the axial movement of the second vertical rod, ensuring the stability and reliability of its movement. At the same time, the above structure facilitates the installation of the second elastic member, and the overall structure has low cost and is stable and reliable.

[0022] Optionally, the lower end of the second vertical pole has a sleeve, and the upper end of the first vertical pole is slidably inserted into the sleeve. A strip-shaped limiting hole is provided on the sleeve, and the length direction of the strip-shaped limiting hole is arranged along the axial direction of the sleeve. A limiting pin is provided on the outer peripheral surface of the upper end of the first vertical pole and is inserted into the strip-shaped limiting hole; a third elastic member is provided in the sleeve for resetting the first vertical pole.

[0023] By adopting the above technical solution, the first upright pole is connected to the swinging pole, and the second upright pole is connected to the handle of the luggage trolley. When the swinging pole drives the brake connecting rod and the friction brake pad to rise, since the upper end of the first upright pole is slidably inserted into the sleeve of the second upright pole, the swinging pole only drives the first upright pole to move; there is no need to drive the second upright pole and the handle of the luggage trolley, which is more labor-saving and effectively avoids the interference of the handle of the luggage trolley with other parts of the luggage trolley when it swings.

[0024] Optionally, the third elastic member is also a coil spring; one end of the third elastic member abuts against the bottom surface of the sleeve, and the other end of the third elastic member abuts against the upper end surface of the first vertical pole.

[0025] By adopting the above technical solution, the third elastic member is used to reset the connection position between the first and second vertical poles, thereby ensuring that both the handle push control and the swing lever push control can effectively realize the brake release function. The above structure is stable and reliable, compact and low-cost.

[0026] Optionally, the limit block is made of plastic or rubber; the upper side of the limit block has an inclined guide surface; the inclined guide surface faces the side away from the brake connecting rod.

[0027] By adopting the above technical solution, the limit block can play a buffering and limiting role for two adjacent luggage trolleys plugged together. At the same time, the inclined guide surface on the limit block is used to promote the swing and lifting of the swing rod. The action is stable and reliable and easy to use.

[0028] In the second aspect, the present application also discloses a luggage trolley with the above-mentioned brake control mechanism, the luggage trolley includes a frame, a chassis frame and wheels; the chassis frame has a loading platform for placing luggage, and the wheels include a first roller arranged at the bottom of the chassis frame; the frame includes two hollow columns arranged at intervals, the lower ends of the hollow columns are fixedly connected to one end of the chassis frame, the upper ends of the hollow columns are provided with a swingable handle, the wheels also include a second roller arranged at the lower end of the hollow column, and the lower end of the hollow column is also fixedly provided with a protective cover for covering the second roller, the brake connecting rods have two groups and are respectively arranged in the two hollow columns, and the friction brake pads are arranged in the protective cover.

[0029] By adopting the above technical solution, the luggage trolley of the present application can quickly and easily release the brakes, thereby facilitating the staff to push and transfer multiple luggage trolleys to a designated location at one time, with convenient and reliable operation. By providing two sets of brake control mechanisms on the left and right sides, the force is more evenly distributed, thereby improving the stability and reliability of the operation and the safety of use.

[0030] Optionally, a cross beam is fixed between the two hollow columns, and there are also two swing rods which are arranged one-to-one corresponding to the two hollow columns. One end of the swing rod is hinged to the cross beam through a connecting seat; a movable through hole is opened on the side of the hollow column, and the other end of the swing rod passes through the movable through hole on the corresponding hollow column and is connected to the brake connecting rod.

[0031] By adopting the above technical solution, the brake connecting rod is arranged in the hollow column, which is more beautiful and safer. The swing rod passes through the movable through hole on the side of the hollow column and is connected to the brake connecting rod. The aperture of the movable through hole is larger than the rod diameter of the swing rod, or the movable through hole is set to an elliptical hole, so that the swing rod will not interfere with the hollow column when swinging up and down.

[0032] In summary, this application includes at least one of the following beneficial technical effects:

[0033] 1. The brake control mechanism in this application can release the brake quickly and easily, making it easier for staff to push multiple luggage trolleys to the designated location at one time, and the operation is convenient and reliable.

[0034] 2. In the present application, the upper end of the first upright pole is slidably inserted into the sleeve of the second upright pole, and the swinging rod only drives the first upright pole to move, without driving the second upright pole and the handle of the luggage trolley. This saves more effort and effectively avoids the interference of the handle of the luggage trolley with other parts of the luggage trolley when it swings.

[0035] 3. The limit block in this application can buffer and limit the two adjacent luggage trolleys plugged together. At the same time, the inclined guide surface on the limit block is used to promote the swing and lifting of the swing rod. The action is stable and reliable and easy to use.

[0036] 4. The luggage trolley and brake control mechanism in this application have a compact overall structure, are easy to use, stable and reliable, and have low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the three-dimensional structure of the luggage trolley under application.

[0038] Figure 2 yes Figure 1 Schematic diagram of the locally enlarged structure at point A in the middle.

[0039] Figure 3 It is a three-dimensional structural diagram of the brake control mechanism in the application.

[0040] Figure 4 It is a partial structural diagram of the brake control mechanism in the application.

[0041] Figure 5 yes Figure 3Schematic diagram of the local enlarged structure at point B in the middle.

[0042] In the picture:

[0043] 10. Frame; 11. Hollow column; 111. Movable through hole; 12. Crossbeam; 121. Connecting seat;

[0044] 20. Chassis frame; 21. Loading platform;

[0045] 30. Limit block; 31. Inclined guide surface;

[0046] 40. Wheel; 41. First roller; 42. Second roller;

[0047] 50. Handle;

[0048] 60. Protective cover;

[0049] 70. Storage basket;

[0050] 80. Brake connecting rod; 81. First vertical rod; 811. Step surface; 812. Limiting ring; 813. Limiting pin; 814. Waist-shaped hole; 82. Second vertical rod; 821. Limiting boss; 822. Sliding rod; 823. Sleeve; 8231. Strip-shaped limiting hole; 83. Friction brake pad; 84. First elastic member; 85. Second elastic member; 86. Third elastic member;

[0051] 90. Swing rod. DETAILED DESCRIPTION

[0052] The following is combined with Figure 1 -Attached Figure 5 , further details of this application are given.

[0053] Reference Figure 1As shown, the luggage trolley in the present application includes a frame 10, a chassis frame 20 and wheels 40; the chassis frame 20 is provided with a loading platform 21 for placing luggage, the frame 10 includes two hollow columns 11 arranged at intervals, the lower ends of the hollow columns 11 are fixedly connected to one end of the chassis frame 20, and the upper ends of the hollow columns 11 are provided with a swingable handle 50, and the wheels 40 include a first roller 41 provided at the bottom of the chassis frame 20 and a second roller 42 provided at the lower ends of the two hollow columns 11, the first roller 41 and the second roller 42 are both universal wheels, the first roller 41 serves as the front wheel, and the number of the first roller 41 can be one or two; The roller 42 serves as the rear wheel, and there are two second rollers 42; a protective cover 60 is provided at the lower end of the hollow column 11 for covering the second roller 42, and the hollow column 11 is welded and fixedly connected to the protective cover 60; the end of the chassis frame 20 is connected to the side of the protective cover 60 or the lower end of the hollow column 11 by bolt connection or welding, and a storage basket 70 is fixedly provided near the upper end of the two hollow columns 11. The storage basket 70 is located between the two hollow columns 11 and below the handle 50; a cross beam 12 is provided near the lower end of the two hollow columns 11, and the two ends of the cross beam 12 are respectively fixedly connected to the opposite sides of the two hollow columns 11.

[0054] Combine Figure 2 and Figure 3 As shown, in the present application, a brake control mechanism is provided for each hollow column 11; the brake control mechanism includes a brake link 80 and a swing lever 90, and the brake link 80 is vertically provided in the corresponding hollow column 11. This hidden design is more beautiful and safe; the upper end of the brake link 80 is connected to the handle 50 of the luggage trolley. When the handle 50 is pressed down, the brake link 80 is driven to move upward through the lever and link structure; the lower end of the brake link 80 is provided with a friction brake pad 83 for contacting the wheel 40 of the luggage trolley, and the friction brake pad 83 is located in the protective cover 60; the swing lever 90 is provided with a brake link 80 and a swing lever 90. One end of the rod 90 is hinged to the crossbeam 12 of the luggage trolley through a connecting seat 121, and a movable through hole 111 is opened on the side of the hollow column 11. The other end of the swing rod 90 passes through the movable through hole 111 on the corresponding hollow column 11 and is movably connected to the brake link 80. The aperture of the movable through hole 111 is larger than the rod diameter of the swing rod 90, or the movable through hole 111 is set to an elliptical hole. In this way, the swing rod 90 will not interfere with the hollow column 11 when it swings up and down. When the swing rod 90 swings upward, it can drive the friction brake pad 83 on the brake link 80 away from the wheel 40 of the luggage trolley.

[0055] Reference Figure 1 and Figure 2As shown, the chassis frame 20 of the luggage trolley is fixed with two limit blocks 30, one located on either side of the chassis frame 20, corresponding to the two swing arms 90. The limit blocks 30 are made of plastic or rubber, and have an inclined guide surface 31 on their upper sides, facing away from the brake link 80. When the chassis frame 20 of the rear luggage trolley is inserted into the front luggage trolley, the limit blocks 30 on the rear luggage trolley push the swing arms 90 on the front luggage trolley to swing upward. Furthermore, the limit blocks 30 provide a buffer and limit the position of the two adjacent luggage trolleys.

[0056] Reference Figure 3 and Figure 4 As shown, the brake link 80 includes a first vertical rod 81 and a second vertical rod 82. A friction brake pad 83 is fixedly attached to the lower end of the first vertical rod 81. A first elastic member 84 is mounted on the first vertical rod 81 to force the friction brake pad 83 on the brake link 80 against the luggage trolley wheel 40. The lower end of the second vertical rod 82 is connected to the upper end of the first vertical rod 81. A second elastic member 85 is mounted on the second vertical rod 82 to reset the luggage trolley handle 50. In the absence of external interference, the first elastic member 84 can force the friction brake pad 83 against the luggage trolley wheel 40, maintaining a stable and reliable braking state. The second elastic member 85 can promptly reset the luggage trolley handle 50, facilitating user operation and preventing operational errors. The end of the swing link 90 is ball-jointed to the brake link 80. Alternatively, the brake link 80 is provided with a waist-shaped hole 814, into which the end of the swing link 90 is inserted. In this embodiment, a plate structure is provided near the lower end of the first vertical rod 81, and the waist-shaped hole 814 is opened on the plate structure for movably plugging with the end of the swing rod 90. In this way, when the swing rod 90 swings, it drives the brake connecting rod 80 to move up and down in a straight line, and the two will not get stuck, and the torque transmission is stable and reliable.

[0057] Reference Figure 3 and Figure 4As shown, in this embodiment, a step surface 811 is provided on the outer circumference of the first vertical rod 81, and the first elastic member 84 is a coil spring sleeved on the first vertical rod 81. A limiting ring 812 for being fixed to the luggage trolley frame 10 is slidably sleeved on the first vertical rod 81, and the two ends of the first elastic member 84 respectively abut against the side surfaces of the step surface 811 and the limiting ring 812; a limiting boss 821 is provided on the outer circumference of the second vertical rod 82, and the second elastic member 85 is a coil spring sleeved on the second vertical rod 82. The sliding rod 822 is used to connect with the luggage trolley handle 50, and the two ends of the second elastic member 85 respectively abut against the side surface of the limiting boss 821 and the end surface of the sliding rod 822; the limiting ring 812 can be fixed on the inner wall of the hollow column 11, and plays a limiting and guiding role in the axial movement of the first vertical rod 81. The sliding rod 822 plays a limiting and guiding role in the axial movement of the second vertical rod 82, thereby ensuring the stability and reliability of the up and down movement of the first vertical rod 81 and the second vertical rod 82, and facilitating the installation of the first elastic member 84 and the second elastic member 85.

[0058] Reference Figure 3 and Figure 5 As shown, the lower end of the second upright 82 has a sleeve 823, and the upper end of the first upright 81 is slidably inserted into the sleeve 823. The sleeve 823 has a strip-shaped limiting hole 8231, the length of which is arranged along the axial direction of the sleeve 823. The upper end outer surface of the first upright 81 has a limiting pin 813 inserted into the strip-shaped limiting hole 8231. The sleeve 823 is provided with a third elastic member 86 for resetting the first upright 81. The third elastic member 86 is also a coil spring; one end of the third elastic member 86 abuts the bottom surface of the sleeve 823, and the other end abuts the upper end surface of the first upright 81. The first vertical rod 81 is connected to the swing rod 90, and the second vertical rod 82 is connected to the luggage trolley's handle 50. As the swing rod 90 drives the brake link 80 and friction brake pad 83 upward, the upper end of the first vertical rod 81 slides and inserts into the sleeve 823 of the second vertical rod 82. Therefore, the swing rod 90 only drives the first vertical rod 81; it does not need to drive the second vertical rod 82 or the luggage trolley's handle 50. This saves effort and effectively prevents the handle 50 from interfering with other parts of the luggage trolley when it swings. The third elastic member 86 is used to reset the connection between the first vertical rod 81 and the second vertical rod 82, ensuring that both the handle 50 and the swing rod 90 can effectively release the brake.

[0059] The operating principle is as follows: The brake control mechanism in this application normally engages the friction brake pads 83 on the brake link 80 against the wheel 40 of the luggage trolley, creating a braking state. When in use, pressing down on the handle 50 causes the brake link 80 and the friction brake pads 83 to rise, disengaging from the wheel 40 and releasing the braking state. When the handle 50 is released, the brake link 80 and the friction brake pads 83 return to their original position and lower, re-establishing the braking state. When staff are moving multiple scattered luggage trolleys to a designated location, they can be stacked together to form a vehicle group, which can then be towed or pushed as a whole, improving work efficiency. In the present application, when the rear luggage trolley is inserted into the front luggage trolley, the limit block 30 on the rear luggage trolley can contact the swing rod 90 on the front luggage trolley. As the insertion goes deeper, the limit block 30 can push the swing rod 90 to swing upward, and the swing rod 90 then drives the brake link 80 and the friction brake pad 83 to move upward. After the friction brake pad 83 on the brake link 80 is away from the wheel 40 of the luggage trolley, the brake state can be released. In this way, after the luggage trolleys in the group are pushed in and stacked together in sequence, the staff only needs to control the handle 50 of the last luggage trolley to control the brakes of all the luggage trolleys.

[0060] The brake control mechanism of the luggage trolley in the present application can release the brakes quickly and easily, thereby facilitating the staff to push and transfer multiple luggage trolleys to the designated location at one time, and the operation is convenient and reliable. By arranging two sets of brake control mechanisms on the left and right sides, the force on the luggage trolley is more evenly distributed, thereby improving the stability and reliability of the movement of the components and the safety of use.

[0061] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A brake control mechanism for a luggage trolley, characterized in that: The invention comprises a brake link (80) and a swing lever (90) arranged on a luggage trolley frame (10), wherein one end of the brake link (80) is connected to a handle (50) of the luggage trolley, and the other end of the brake link (80) is provided with a friction brake pad (83) for contacting a wheel (40) of the luggage trolley; One end of the swing lever (90) is hinged to the frame (10) of the luggage trolley, and the other end of the swing lever (90) is movably connected to the brake link (80) and can drive the friction brake pad (83) on the brake link (80) away from the wheel (40) of the luggage trolley when the swing lever (90) swings upward; The brake control mechanism further comprises a limit block (30) fixed on the chassis frame (20) of the luggage trolley; when the chassis frame (20) of the rear luggage trolley is inserted into the front luggage trolley, the limit block (30) on the rear luggage trolley can push the swing rod (90) in the front luggage trolley to swing upward and lift.

2. The brake control mechanism of the luggage trolley according to claim 1, characterized in that: The end of the swing rod (90) is ball-hinged with the brake connecting rod (80); or a waist-shaped hole (814) is provided on the brake connecting rod (80), and the end of the swing rod (90) is inserted into the waist-shaped hole (814).

3. The brake control mechanism of the luggage trolley according to claim 1 or 2, characterized in that: The brake link (80) includes a first vertical rod (81) and a second vertical rod (82), the friction brake pad (83) is fixedly connected to the lower end of the first vertical rod (81), and the first vertical rod (81) is sleeved with a first elastic member (84) for making the friction brake pad (83) on the brake link (80) abut against the wheel (40) of the luggage trolley; The lower end of the second vertical rod (82) is connected to the upper end of the first vertical rod (81), and the second vertical rod (82) is sleeved with a second elastic member (85) for resetting the handle (50) of the luggage trolley.

4. The brake control mechanism of the luggage trolley according to claim 3, characterized in that: A stepped surface (811) is provided on the outer peripheral surface of the first vertical rod (81); the first elastic member (84) is a coil spring sleeved on the first vertical rod (81); a limiting ring (812) for being fixed to the luggage trolley frame (10) is slidably sleeved on the first vertical rod (81); the two ends of the first elastic member (84) respectively abut against the stepped surface (811) and the side surface of the limiting ring (812).

5. The brake control mechanism of the luggage trolley according to claim 3, characterized in that: A limiting boss (821) is provided on the outer peripheral surface of the second vertical rod (82); the second elastic member (85) is a coil spring sleeved on the second vertical rod (82); a sliding rod (822) for connecting with the luggage trolley handle (50) is slidably sleeved on the second vertical rod (82); the two ends of the second elastic member (85) respectively abut against the side surface of the limiting boss (821) and the end surface of the sliding rod (822).

6. The brake control mechanism of the luggage trolley according to claim 3, characterized in that: The lower end of the second vertical rod (82) is provided with a sleeve (823), the upper end of the first vertical rod (81) is slidably inserted into the sleeve (823), and a strip-shaped limiting hole (8231) is provided on the sleeve (823), and the length direction of the strip-shaped limiting hole (8231) is arranged along the axial direction of the sleeve (823). The outer peripheral surface of the upper end of the first vertical rod (81) is provided with a limiting pin (813) inserted into the strip-shaped limiting hole (8231); and a third elastic member (86) is provided in the sleeve (823) for resetting the first vertical rod (81).

7. The brake control mechanism of the luggage trolley according to claim 6, characterized in that: The third elastic member (86) is also a coil spring; one end of the third elastic member (86) abuts against the bottom surface of the sleeve (823), and the other end of the third elastic member (86) abuts against the upper end surface of the first vertical rod (81).

8. The brake control mechanism of the luggage trolley according to claim 1, characterized in that: The limit block (30) is made of plastic or rubber; the upper side of the limit block (30) is provided with an inclined guide surface (31); the inclined guide surface (31) faces the side away from the brake connecting rod (80).

9. A luggage trolley comprising the brake control mechanism according to any one of claims 1 to 8, characterized in that: The luggage trolley comprises a frame (10), a chassis frame (20) and a wheel (40); the chassis frame (20) is provided with a loading platform (21) for placing luggage, and the wheel (40) comprises a first roller (41) arranged at the bottom of the chassis frame (20); the frame (10) comprises two hollow columns (11) arranged at intervals, the lower end of the hollow column (11) is fixedly connected to one end of the chassis frame (20), the upper end of the hollow column (11) is provided with a swingable handle (50), the wheel (40) further comprises a second roller (42) arranged at the lower end of the hollow column (11), the lower end of the hollow column (11) is also fixedly provided with a protective cover (60) for covering the second roller (42), the brake connecting rod (80) has two groups and is respectively arranged in the two hollow columns (11), and the friction brake pad (83) is arranged in the protective cover (60).

10. The luggage trolley according to claim 9, characterized in that: A crossbeam (12) is fixed between the two hollow columns (11), and there are also two swing rods (90) which are arranged in a one-to-one correspondence with the two hollow columns (11). One end of the swing rod (90) is hinged on the crossbeam (12) through a connecting seat (121); a movable through hole (111) is opened on the side of the hollow column (11), and the other end of the swing rod (90) passes through the movable through hole (111) on the corresponding hollow column (11) and is connected to the brake connecting rod (80).

Images