One-key double-brake trolley

Abstract

The utility model discloses a one-key double-brake handcart which comprises a handcart frame, two front idler wheels and two rear idler wheels are symmetrically arranged at the bottom of the handcart frame, a brake mechanism is arranged on the two rear idler wheels, and the brake mechanism comprises a connecting pipe, a pedal installed on the connecting pipe and two brake assemblies installed at the ends of the connecting pipe respectively. The two ends of the pedal are connected with the two brake assemblies respectively, the pedal drives the connecting pipe to rotate, and the limiting parts of the brake assemblies abut against the limiting pieces on the rear idler wheel to stop the rear idler wheel. The two wheels on the rear side can be braked at the same time, and the efficiency of braking the trolley in the advancing process is higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of trolleys, and in particular relates to a one-button double-brake trolley. Background Art

[0002] Most of the trolleys on the market, especially those used in outdoor environments, are not equipped with brakes. For example, the Chinese patent with announcement number CN219904428U discloses a foldable frame. Since the trolley is pushed forward manually, it is mostly stopped by human pulling when it needs to stop. When loaded with goods, the brake-free trolley is relatively slow to stop and requires a large manual pulling force. Some trolleys use rollers with brakes on the two front wheels to stop the trolley during the movement. When the trolley needs to stop, the user steps on the brake plate on any wheel with one foot. In this single wheel independent braking method, the user can only stop a single wheel when stepping on the brake, and the other wheel does not stop, and the trolley will still move a distance. Summary of the invention

[0003] The utility model aims to provide a one-button double-brake trolley in view of the defects of the prior art, which can brake the two rear wheels at the same time, and the efficiency of braking the trolley during the moving process is higher.

[0004] In order to achieve the above purpose, the utility model adopts the following technical scheme: a one-button dual-brake trolley, including a frame, two front rollers and two rear rollers are symmetrically arranged at the bottom of the frame, and a brake mechanism is provided on the two rear rollers. The brake mechanism includes a connecting pipe, a pedal installed on the connecting pipe and two brake assemblies respectively installed at the ends of the connecting pipe, and the two ends are respectively connected to the two brake assemblies, the pedal drives the connecting pipe to rotate, and the limiting part of the brake assembly contacts the limiting part on the rear roller to stop the rear roller.

[0005] Furthermore, the frame is connected to the rear roller via a wheel hub connector, the brake assembly comprises a pipe sleeve and a pipe plug, the pipe sleeve, the connecting pipe end, and the pipe plug are sequentially arranged from the outside to the inside and fixedly connected, the limiting piece of the rear roller is located in the limiting groove of the pipe plug end, and the pipe plug end is rotatably connected to the wheel hub of the rear roller.

[0006] Furthermore, a flange is provided at the end of the pipe plug, a limiting groove is opened on one side of the flange, and the limiting member includes a boss provided on the hub of the rear roller and a limiting baffle located on the side of the boss, and the limiting baffle is located in the limiting groove.

[0007] Furthermore, the brake assembly also includes a positioning piece installed in the pipe plug, and the positioning piece passes through the end of the connecting pipe.

[0008] Furthermore, a handrail tube is provided on the rear side of the frame, and the two ends of the handrail tube are rotatably connected to the two sides of the rear side, and a positioning locking mechanism is provided at the end of the handrail tube; the positioning locking mechanism includes a right shell installed on the frame, a gear fixed in the right shell, a left shell fixed to the handrail tube, and a locking member movably cooperated with the left shell.

[0009] Furthermore, the left shell body is provided with a pin shaft passing through the locking piece and the gear, and the inner surface of the left shell body is provided with a limit column and a wedge block on the side and outside of the pin shaft respectively, the inner wall of the center hole of the locking piece is provided with a groove for the movement of the limit column, and the surface of the locking piece is provided with a wedge groove adapted to the wedge block.

[0010] Furthermore, a ceiling is installed on the top of the frame, and the ceiling includes a cover cloth and a ceiling bracket. The ceiling bracket includes four support rods, four top rods and a center seat. The four top rods are symmetrically connected to the four corners of the center seat for rotation, and each top rod is respectively connected to the top of the support rod, and the bottom of the support rod is detachably connected to the top of the frame.

[0011] Furthermore, the frame includes a front frame, a rear frame, a bottom frame and two side frames. The front frame and the rear frame have the same structure, and front rollers and rear rollers are provided at the bottom of the front frame and the rear frame; the front frame includes a frame body composed of two vertical tubes, an upper cross tube and a lower cross tube, a fixed seat is provided on the top of the vertical tube, and a slider is provided on the vertical tube; the side frame includes one or more hinged X-shaped connecting tubes, the upper end of any side of the side frame is riveted to the fixed seat, and the lower end is riveted to the slider; the bottom frame includes two bottom frames riveted on the inner side, and the outer side of the bottom frame is riveted to the lower cross tube.

[0012] Furthermore, the front frame is provided with a handle bar which can rotate forward and backward.

[0013] Furthermore, the frame has a built-in detachable storage bag.

[0014] Furthermore, the frame also includes a U-shaped bottom tube, the transverse tube of the U-shaped bottom tube is located below the bottom frame, and the two vertical tubes of the U-shaped bottom tube are riveted to the two side frames.

[0015] By adopting the technical scheme of the utility model, the beneficial effects of the utility model are as follows: the user can brake the two rear wheels at the same time by stepping on the brake pedal with one foot, thereby improving the rapidity of stopping the trolley during driving, reducing the distance of further movement after braking, and improving the efficiency of braking and stopping the trolley; the left shell body is driven to rotate relative to the right shell body by the rotation of the handrail tube, and the limit column and wedge block in the left shell body are respectively movably matched with the groove and wedge groove of the locking member, and the left shell body is locked or disengaged from the gear to achieve locking or unlocking; the two side frames are connected by a U-shaped bottom tube to improve the stability of the frame; the roof setting is improved for use in bad weather on rainy days to shield and protect the items in the frame; the side frames and the bottom frame are foldable, so that the trolley can be folded and stored when not in use, reducing the storage space; a handle rod is arranged in the front and a handrail tube is arranged in the rear, so that the user can push and pull from the front or the rear according to actual needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a stereogram of the first one-button dual-brake trolley;

[0017] Figure 2 This is a disassembled picture of a one-button dual-brake trolley;

[0018] Figure 3 It is a three-dimensional picture of the frame;

[0019] Figure 4 It is a side view of the frame;

[0020] Figure 5a It is a three-dimensional diagram of the rear frame and rear wheels;

[0021] Figure 5b This is a schematic diagram of the rear frame and rear wheel being separated;

[0022] Figure 6a Schematic diagram of the handrail tube and rear frame being separated at an angle;

[0023] Figure 6b This is a schematic diagram of the handrail tube and rear frame being separated from each other at another angle;

[0024] Figure 7a is a schematic diagram of the inner side of the left housing;

[0025] Figure 7b is a schematic diagram of a locking member;

[0026] Figure 8 This is a three-dimensional image of the second type of one-button dual-brake trolley;

[0027] Fig. 9 This is a three-dimensional picture of the frame of the second type of one-button dual-brake trolley;

[0028] Fig.10 It is a stereogram of the third type of one-button dual-brake trolley.

[0029] In the figure: 1 frame, 2 front frame, 21 vertical tube, 22 upper transverse tube, 23 lower transverse tube, 24 fixed seat, 25 slider, 3 rear frame, 4 side frame, 41 X-shaped connecting tube, 5 bottom frame, 51 bottom frame, 60 front roller, 61 rear roller, 62 wheel hub connecting piece, 63 wheel hub, 64 limiting piece, 64a boss, 64b limiting baffle, 7 brake mechanism, 71 connecting tube, 72 pedal, 73 pipe sleeve, 74 pipe plug, 74a limiting groove, 75 positioning piece, 8 positioning locking mechanism, 81 right housing, 82 gear, 83 left housing, 83a pin shaft, 83b limiting column, 83c wedge block, 84 locking piece, 84a groove, 84b wedge groove, 9 handrail tube, 10 storage bag, 11 handle rod, 11a upper rod, 11b lower rod, 12 U-shaped bottom tube, 13 ceiling, 13a cover cloth, 13b support rod, 13c top rod, 13d center seat, 13e fixing block. DETAILED DESCRIPTION

[0030] The specific embodiments of the present invention are further described in conjunction with the accompanying drawings to make the present technical solution clearer and more understandable.

[0031] Example 1

[0032] like Figure 1-7b As shown, a one-button dual-brake trolley includes a frame 1, two front rollers 60 and two rear rollers 61 are symmetrically arranged at the bottom of the frame 1, and a brake mechanism is provided on the two rear rollers 61. The brake mechanism 7 includes a connecting pipe 71, a pedal 72 installed on the connecting pipe 71 and two brake assemblies respectively installed at the ends of the connecting pipe. The pedal 72 is stepped on to drive the connecting pipe 71 to rotate, and the limiting part of the brake assembly contacts the limiting part 64 on the rear roller 61 to stop the rear roller.

[0033] The frame 1 is connected to the rear roller 61 through a wheel hub connector 62. The brake assembly includes a pipe sleeve 73 and a pipe plug 74. The pipe sleeve 73, the end of the connecting pipe 71, and the pipe plug 74 are sequentially arranged from outside to inside and fixedly connected. The limiting member 8 of the rear roller 61 is located in the limiting groove 74a at the end of the pipe plug 74. The end of the pipe plug 74 is rotatably connected to the wheel hub 63 of the rear roller 61. Specifically, a flange is provided at the end of the pipe plug 74, and a limiting groove 74a is opened on one side of the flange. The limiting member 64 includes a boss 64a provided on the wheel hub of the rear roller and a limiting block 64b located on the side of the boss 64a. After the pipe plug 74 is installed with the wheel hub 63, the limiting block 82 is located in the limiting groove 74a. Recesses can also be provided at the end points of the travel on the left and right sides of the limiting groove 74a, and the pipe plug 74 rotates with the connecting pipe 71 so that the limiting block 64b is accurately embedded in the recess.

[0034] The pedal 72 is stepped on to drive the connecting tube 71 and the pipe plug 74 to rotate together. Since a limit baffle 64b is provided on the side of the boss 64a on the inner side of the wheel hub, the pipe plug 74 rotates until one side of the limit groove 74a contacts the limit baffle 64b to form a restriction, thereby restricting the rolling of the entire rear roller 61. By stepping on the pedal 72 with one foot, the two rear rollers 61 are stopped at one time, realizing a one-button double brake function.

[0035] In order to further fix the pipe plug and the connecting pipe, the brake assembly further includes a positioning piece 75 installed in the pipe plug 74 , and the lower end of the positioning piece 75 passes through the pipe wall of the connecting pipe 71 and the pipe sleeve 73 .

[0036] A handrail tube 9 is provided at the rear side of the frame 1, and both ends of the handrail tube 9 are rotatably connected to both sides of the rear frame 3, and a positioning locking mechanism 8 is provided at the ends of the handrail tube 9; the positioning locking mechanism 8 comprises a right housing 81 mounted on the frame, a gear 82 fixed in the right housing 81, a left housing 83 fixed to the handrail tube 9, and a locking member 84 movably matched with the left housing 83. The right housing 81 of this embodiment is integrally formed with the fixing seat 24, and a slot matching the shape of the gear 82 is provided in both the right housing 81 and the left housing 83, and the right side of the gear is fixedly installed in the slot of the right housing 81.

[0037] The center of the left housing 83 is provided with a pin shaft 83a passing through the locking member 84 and the gear 82, and the inner surface of the left housing 83 is provided with a limit column 83b and a wedge block 83c on the side and outside of the pin shaft, respectively. The inner wall of the central hole of the locking member 84 is provided with a groove 84a for the limit column 83b to move, and the surface of the locking member is provided with a wedge groove 84b adapted to the wedge block. The limit column 83a and the wedge block 83b are both symmetrically arranged in two.

[0038] When the handrail tube 9 is rotated upward, the left shell body 83 is driven to rotate, and as the wedge block 83c on the inner surface of the left shell body 83 gradually slides into the wedge groove 84b of the locking member 84, the limiting column 83b contacts one side of the groove 84a until the left shell body 83 moves rightward along the pin shaft 83a and clamps the left side of the gear 82 to form a lock. At this time, the handrail tube 9 is locked in a horizontal state, and the user can push the trolley by holding the handrail tube 9; on the contrary, when it is not needed, when the handrail tube 9 is rotated downward, the left shell body 83 is driven to rotate in the opposite direction, the wedge block 83c disengages from the wedge groove 84b, and the left shell body 83 disengages from the left side of the gear 82 to release the lock.

[0039] A ceiling 13 is installed on the top of the frame 1, and the ceiling includes a cover cloth 13a and a ceiling bracket, and the ceiling bracket includes four support rods 13b, four top rods 13c and a center seat 13d, and the four top rods 13c are symmetrically connected to the four corners of the center seat 13b, and each top rod 13c is respectively connected to the top of the support rod 13b, and the bottom of the support rod 13b is detachably connected to the top of the frame. The lower end of the fixed block 13e passes through the cover cloth 13a and is fixed to the surface of the center seat 13b, and the cover cloth covers the top rods 13c and the top of the support rods 13b.

[0040] The frame 1 includes a front frame 2, a rear frame 3, a bottom frame 5 and two side frames 4. The front frame 1 and the rear frame 2 have the same structure. The front frame 1 and the rear frame 2 are provided with front rollers 60 and rear rollers 61 at the bottom. The front frame 1 includes a frame body composed of two vertical pipes 21, an upper transverse pipe 22 and a lower transverse pipe 23. A fixing seat 24 is provided at the top of the vertical pipe 21, and a slider 25 is provided on the vertical pipe 21. The side frame 4 includes three X-shaped connecting pipes 41 hinged in sequence (the X-shaped connecting pipe 41 is formed by cross-riveting two pipes). The upper end of any side of the side frame 4 is riveted to the fixing seat 24, and the lower end is riveted to the slider 25. The bottom frame 5 includes two bottom frames 51 riveted on the inner side, and the outer side of the bottom frame 51 is riveted to the lower transverse pipe 23. The entire frame can be folded for easy storage and to reduce the space occupied when the cart is not in use.

[0041] The front frame 2 is provided with a handle bar 11 which can rotate forward and backward.

[0042] In a structure such as Figure 1 As shown, the handle bar 11 is a telescopic bar, and the bottom of the telescopic bar is riveted to the middle of the lower cross tube 23. In another structure, as Fig.10 As shown, the handle rod 11 includes an upper rod 11a and two symmetrical lower rods 11b. The bottom of the upper rod 11a is riveted to the upper ends of the two lower rods 11b respectively, and the lower rods can rotate left and right relative to the upper rod; the bottoms of the two lower rods 11b are riveted to the lower ends of the two vertical pipes 21 of the front frame 2 respectively, and the lower rods 11b can rotate forward and backward relative to the vertical pipes 21.

[0043] The frame 1 has a built-in detachable storage bag 10 . A connecting portion with a lower opening is arranged on the side of the storage bag 10 , and the connecting portion is installed at the hinged portion of the two X-shaped connecting pipes 41 .

[0044] Example 2

[0045] like Figure 8-Figure 9 As shown, different from the embodiment 1, the one-button dual-brake trolley of this embodiment further includes a U-shaped bottom tube 12, the horizontal tube of the U-shaped bottom tube 12 is located below the bottom frame 5, and the two vertical tubes of the U-shaped bottom tube 12 are riveted to the two side frames 4 respectively, specifically, to the X-shaped connecting tube 41 in the middle of the side frame 4.

[0046] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A one-button dual-brake trolley, comprising a frame, characterized in that: Two front rollers and two rear rollers are symmetrically arranged at the bottom of the frame, and a brake mechanism is provided on the two rear rollers. The brake mechanism comprises a connecting pipe, a pedal installed on the connecting pipe and two brake assemblies respectively installed at the ends of the connecting pipe, and the two ends are respectively connected to the two brake assemblies, and the pedal drives the connecting pipe to rotate, and the limiting part of the brake assembly contacts the limiting part on the rear roller to stop the rear roller.

2. The one-button dual-brake trolley according to claim 1, characterized in that: The frame is connected to the rear roller via a wheel hub connector, the brake assembly comprises a pipe sleeve and a pipe plug, the pipe sleeve, the connecting pipe end, and the pipe plug are sequentially arranged from outside to inside and fixedly connected, the limiting piece of the rear roller is located in the limiting groove of the pipe plug end, and the pipe plug end is rotatably connected to the wheel hub of the rear roller.

3. The one-button dual-brake trolley according to claim 2, characterized in that: A flange is arranged at the end of the pipe plug, a limiting groove is opened on one side of the flange, and the limiting member comprises a boss arranged on the hub of the rear roller and a limiting baffle located on the side of the boss, and the limiting baffle is located in the limiting groove.

4. The one-button dual-brake trolley according to claim 3, characterized in that: The brake assembly also includes a positioning piece installed in the pipe plug, and the positioning piece passes through the end of the connecting pipe.

5. The one-button dual-brake trolley according to claim 1, characterized in that: A handrail tube is provided on the rear side of the frame, and the two ends of the handrail tube are rotatably connected to the two sides of the rear side. A positioning locking mechanism is provided at the end of the handrail tube; the positioning locking mechanism includes a right shell installed on the frame, a gear fixed in the right shell, a left shell fixed to the handrail tube, and a locking member movably matched with the left shell.

6. The one-button dual-brake trolley according to claim 5, characterized in that: The left shell body is provided with a pin shaft passing through the locking piece and the gear. The inner surface of the left shell body is located on the side of the pin shaft and the outside of the pin shaft and is respectively provided with a limit column and a wedge block. The inner wall of the center hole of the locking piece is provided with a groove for the movement of the limit column, and the surface of the locking piece is provided with a wedge groove adapted to the wedge block.

7. The one-button dual-brake trolley according to claim 1, characterized in that: A ceiling is installed on the top of the frame, and the ceiling includes a cover cloth and a ceiling bracket. The ceiling bracket includes four support rods, four top rods and a center seat. The four top rods are symmetrically connected to the four corners of the center seat for rotation, and each top rod is respectively connected to the top of the support rod, and the bottom of the support rod is detachably connected to the top of the frame.

8. The one-button dual-brake trolley according to claim 1, characterized in that: The frame includes a front frame, a rear frame, a bottom frame and two side frames. The front frame and the rear frame have the same structure, and front rollers and rear rollers are arranged at the bottom of the front frame and the rear frame. The front frame includes a frame body composed of two vertical tubes, an upper cross tube and a lower cross tube. A fixed seat is arranged on the top of the vertical tube, and a slider is arranged on the vertical tube. The side frame includes one or more hinged X-shaped connecting tubes, and the upper end of any side of the side frame is riveted to the fixed seat, and the lower end is riveted to the slider. The bottom frame includes two bottom frames riveted on the inner side, and the outer side of the bottom frame is riveted to the lower cross tube.

9. The one-button dual-brake trolley according to claim 8, characterized in that: The front frame is provided with a handlebar that can rotate forward and backward; or, the frame has a built-in detachable storage bag.

10. The one-button dual-brake trolley according to claim 8 or 9, characterized in that: The frame also includes a U-shaped bottom tube, a transverse tube of the U-shaped bottom tube is located below the bottom frame, and two vertical tubes of the U-shaped bottom tube are riveted to the two side frames.

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