Four-wheel automatic braking trolley

Abstract

The utility model discloses a four-wheel automatic brake trolley, which comprises a self-locking mechanism and a bolt fixing mechanism, the self-locking mechanism comprises a rotary support frame for rotary support, a pressing handle for manual pressing support, a pull rod for movable connection, a transmission rope and a pull support rope for transmission support, and a limit frame for clamping and locking, one end of the pressing handle is rotationally installed in the rotary supporting frame, a pulling rod is rotationally installed at the lower end of the pressing handle, limiting ring grooves are formed in the two opposite sides of the rotary supporting frame, and the limiting ring grooves are used for horizontal limiting of the pulling rod; under the support of the self-locking mechanism, when a worker holds the control part, the self-locking mechanism is in an unlocking state, and when the worker loosens the control part, the self-locking mechanism is automatically locked, so that the device can automatically start a brake system when the device is static or in an emergency, and a vehicle is prevented from accidentally sliding or sliding.

Description

Technical Field

[0001] This utility model relates to the field of transportation device technology, and in particular to a four-wheeled automatic braking trolley. Background Technology

[0002] Small carts are convenient for transporting small quantities of goods in places such as train stations, airports, and shopping malls.

[0003] The trolley mainly relies on four wheels for movement and support. Goods are placed on the support plate and the trolley is pushed to move. Because the existing trolleys do not have a self-locking mechanism, they cannot stop in time when unattended or when they accidentally slide, affecting the safety of the surrounding area and the goods on them.

[0004] Therefore, we offer a four-wheeled automatic braking trolley. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned technical problems by providing a four-wheeled automatic braking trolley, thereby enabling the device to have a self-locking function.

[0006] In view of this, the present invention provides a four-wheeled automatic braking trolley, including a self-locking mechanism and a pin fixing mechanism, characterized in that:

[0007] The self-locking mechanism includes a rotating support frame for rotating support, a pressing handle for manually pressing support, a pull rod for movable connection, a transmission rope and a pull support rope for transmission support, and a limiting frame for locking.

[0008] The pressing handle is rotatably mounted inside the rotating support frame, and a pull rod is rotatably mounted on the lower end of the pressing handle. Limiting annular grooves are opened on opposite sides of the rotating support frame. The limiting annular grooves are used for horizontal limiting of the pull rod. One end of the transmission rope is installed on the lower end of the pull rod.

[0009] At least two limiting blocks are installed on the outside of the transmission rope. The pulling support rope is installed on both sides of the limiting blocks. A rotating support frame two is installed at the upper end of the pulling support rope. The rotating support frame two is rotatably connected to the limiting frame. A telescopic spring is installed on the outside of the pulling support rope.

[0010] A limiting groove is provided through the outer side of the limiting frame, and a limiting rod is inserted into the limiting groove. A rolling wheel is installed above the middle part of the limiting frame, and several limiting teeth are installed on both sides of the rolling wheel. The limiting frame is inserted between two adjacent limiting teeth.

[0011] The pin fixing mechanism includes a support plate for supporting the object, a movable frame rotatably mounted above the support plate, and a pin for limiting the insertion of the movable frame.

[0012] Preferably, the rotating support frame is installed on the upper end of the movable frame, the transmission rope is inserted into the support plate, and the lower half of the transmission rope and the pulling support rope are both located inside the support plate.

[0013] Preferably, the telescopic springs are installed on both sides of the limiting block, and a guide rod is installed in the middle of the telescopic spring. The guide rod is inserted into the limiting plate, and the limiting block is installed on one side of the limiting plate.

[0014] Preferably, at least four wheel frames are installed at the lower end of the support plate, and two wheel frames at the same horizontal position have the same specifications. The wheel frames are divided into swivel casters and fixed casters. The swivel casters are used for steering support of the device.

[0015] Preferably, the limiting rod is installed on both sides of the inner wall of the wheel frame, and the limiting frame is slidably connected to the wheel frame through its outer guide rod.

[0016] Preferably, the second rotating support frame is rotatably mounted inside the lower half of the wheel frame, and the telescopic spring is mounted on the lower end of the second rotating support frame.

[0017] Preferably, a fixing plate is installed at the lower end of the telescopic spring, and the fixing plate is installed on the lower fixed part of the wheel frame.

[0018] Compared with the prior art, the present invention provides a four-wheeled automatic braking trolley, which has the following beneficial effects:

[0019] 1. This utility model features an automatic braking function: when the four-wheeled automatic braking trolley is stationary or encounters an emergency, it can automatically activate the braking system to ensure that the vehicle will not accidentally slide or roll away, thereby improving safety.

[0020] 2. This utility model has good stability: the four-wheel design makes the trolley more stable during transportation, and it can carry heavy goods without easily tipping over.

[0021] 3. In this utility model, the trolley is usually designed with an easy-to-operate handle and a braking device, which allows users to push and brake with simple operation.

[0022] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model has a simple structure and is easy to operate. Attached Figure Description

[0023] Figure 1 This is a front view schematic diagram of the overall structure of the four-wheeled automatic braking trolley proposed in this utility model;

[0024] Figure 2 This is an enlarged schematic diagram of section A of the four-wheeled automatic braking trolley proposed in this utility model;

[0025] Figure 3 This is a three-dimensional schematic diagram of the bottom structure of the support plate of the four-wheeled automatic braking trolley proposed in this utility model;

[0026] Figure 4 This is a schematic diagram of the locking connection method of the four-wheeled automatic braking trolley proposed in this utility model;

[0027] Figure 5 This is a schematic diagram of the rolling wheel connection method of the four-wheeled automatic braking trolley proposed in this utility model;

[0028] Figure 6 This is a three-dimensional structural diagram of the connector of the four-wheeled automatic braking trolley proposed in this utility model.

[0029] In the diagram: 101. Press handle; 102. Rotate support frame; 103. Pull rod; 104. Limiting ring groove; 105. Transmission rope; 106. Limiting block; 107. Pull support rope; 108. Rotate support frame; 109. Limiting frame; 110. Limiting tooth; 111. Rolling wheel; 112. Wheel frame; 113. Limiting rod; 114. Limiting groove; 115. Telescopic spring; 2. Support plate; 3. Moving frame; 301. Pin. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0031] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] Example 1: A four-wheeled automatic braking trolley, such as Figures 1-6 As shown, it includes a self-locking mechanism and a pin fixing mechanism.

[0033] The self-locking mechanism includes a rotating support frame 102 for rotating support, a pressing handle 101 for manual pressing support, a pull rod 103 for movable connection, a transmission rope 105 and a pulling support rope 107 for transmission support, and a limiting frame 109 for locking.

[0034] One end of the pressing handle 101 is rotatably installed inside the rotating support frame 102. A pull rod 103 is rotatably installed at the lower end of the pressing handle 101. Limiting annular grooves 104 are opened on opposite sides of the rotating support frame 102. The limiting annular grooves 104 are used for horizontal limiting of the pull rod 103. One end of the transmission rope 105 is installed at the lower end of the pull rod 103.

[0035] At least two limiting blocks 106 are installed on the outside of the transmission rope 105. Pulling support ropes 107 are installed on both sides of the limiting blocks 106. A rotating support frame 108 is installed at the upper end of the pulling support rope 107. The rotating support frame 108 is rotatably connected to the limiting frame 109. A telescopic spring 115 is installed on the outside of the pulling support rope 107.

[0036] A limiting groove 114 is provided through the outer side of the limiting frame 109, and a limiting rod 113 is inserted into the limiting groove 114. A rolling wheel 111 is installed above the middle part of the limiting frame 109, and several limiting teeth 110 are installed on both sides of the rolling wheel 111. The limiting frame 109 is inserted between two adjacent limiting teeth 110.

[0037] The pin fixing mechanism includes a support plate 2 for supporting the object, a movable frame 3 rotatably mounted above the support plate 2, and a pin 301 for inserting and limiting the movable frame 3.

[0038] Supported by the self-locking mechanism, the self-locking mechanism is unlocked when the operator grips the control component, and automatically locks when the operator releases the control component. This allows the device to automatically activate the braking system when stationary or in case of an emergency, ensuring the vehicle does not accidentally slide or roll, thus improving safety. Specifically, by pressing the handle 101, it is rotated under the support of the rotating support frame 102, causing the pull rod 103 to rotate synchronously inside the limiting ring groove 104. Under the horizontal limitation of the limiting ring groove 104, the pull rod 103 pulls the transmission rope 105. Thus, under the limiting block 106's limiting and securing of the pull support rope 107 and the transmission rope 105, all four pull support ropes 107 move simultaneously. Then, the rotating support frame 102... Supported by 08, the limit frame 109 is pulled and moved simultaneously, causing the limit frame 109 to move away from the rolling wheel 111, releasing the limit frame 109 from the locking range of the limit tooth 110, allowing the rolling wheel 111 to roll normally. When the device is stationary or moves suddenly, since the operator no longer presses the handle 101, the elastic return movement of the telescopic spring 115 drives the limit frame 109 to move automatically towards the rolling wheel 111, moving the limit frame 109 between two adjacent limit teeth 110, thereby achieving the effect of automatically limiting the limit teeth 110, achieving simultaneous limiting of all four rolling wheels 111, effectively preventing their accidental movement. At the same time, with the pin 301 fixing the movable frame 3, it is convenient to fix the use position and storage position of the movable frame 3.

[0039] like Figures 1-6 As shown, the rotating support frame 102 is installed on the upper end of the movable frame 3, the transmission rope 105 is inserted into the support plate 2, and the lower half of the transmission rope 105 and the pulling support rope 107 are both located inside the support plate 2.

[0040] By mounting the rotating support frame 102 on the upper end of the movable frame 3, the pressing handle 101 can be pressed while holding the movable frame 3, thereby improving the effect of simultaneous movement of the locking mechanism and the device. At the same time, under the limiting support of the support plate 2, the stability of the moving angle of the transmission rope 105 and the pulling support rope 107 is ensured, as well as the safety of the surrounding environment.

[0041] like Figures 1-6 As shown, telescopic springs 115 are installed on both sides of the limiting block 106, and a guide rod is installed in the middle of the telescopic spring 115. The guide rod is inserted into the limiting plate, and the limiting block 106 is installed on one side of the limiting plate.

[0042] With the limiting block 106 providing limiting support for the pull support rope 107 and the transmission rope 105, it ensures that when the transmission rope 105 moves, it can simultaneously drive the four pull support ropes 107 to move simultaneously, improving the effect of limiting multiple wheels at the same time. At the same time, with the elastic support of the telescopic spring 115, the effect of automatic reset of the transmission rope 105 is improved, further improving the accuracy of the position of the transmission rope 105 when the locking mechanism is reset, and improving the stability of the locking mechanism when it moves again.

[0043] Example 2: A four-wheeled automatic braking trolley, such as Figures 1-6 As shown, at least four wheel frames 112 are installed at the lower end of the support plate 2, and two wheel frames 112 at the same horizontal position have the same specifications. The wheel frames 112 are divided into swivel wheels and fixed casters. The swivel wheels are used for steering support of the device.

[0044] Limiting rods 113 are installed on both sides of the inner wall of wheel frame 112, and limiting frame 109 is slidably connected to wheel frame 112 through its outer guide rod.

[0045] By rotating the locking mechanism inside the wheel frame 112, the stability of the locking mechanism itself is ensured when limiting the casters and fixed casters, improving its stability and accuracy during locking. At the same time, under the limitation of the wheel frame 112 on the limiting rod 113 and the limitation of the limiting groove 114 itself, the limiting frame 109 can only move in a fixed position, ensuring the accuracy and reliability of the moving distance of the limiting frame 109. Meanwhile, under the horizontal limitation of the limiting rod 113 on the limiting frame 109, the strength of the limiting frame 109 is improved when used for vertical limitation.

[0046] like Figures 1-6 As shown, the rotating support frame 2 108 is simultaneously rotatably mounted inside the lower half of the wheel frame 112, and the telescopic spring 115 is mounted on the lower end of the rotating support frame 2 108.

[0047] A fixing plate is installed at the lower end of the telescopic spring 115, and the fixing plate is installed on the lower fixed part of the wheel frame 112.

[0048] With the rotational support of the rotating support frame 108 and the outer part, the angle of the pulling support rope 107 is kept stable, effectively preventing the twisting phenomenon caused by the rotation of the universal wheel, thus ensuring the long-term stability of the locking mechanism movement. Furthermore, with the auxiliary limit of the fixed plate, the elastic operation of the telescopic spring 115 is ensured to guarantee the stable support for the movement of the locking part.

[0049] Working principle: First, by pressing the handle 101, it is supported by the rotation of the first rotating support frame 102, causing the pull rod 103 to rotate synchronously inside the limiting ring groove 104. Under the horizontal limitation of the limiting ring groove 104, the pull rod 103 pulls the transmission rope 105. Thus, under the limiting block 106's limiting and securing of the pull support rope 107 and the transmission rope 105, the four pull support ropes 107 move simultaneously. Then, supported by the second rotating support frame 108, the limiting frame 109 moves simultaneously, causing the limiting frame 109 to move away from the rolling wheel 111, thus releasing the limiting frame 109 from the limiting ring groove 111. The locking range of the positioning teeth 110 allows the rolling wheels 111 to roll normally. When the device is stationary or moves suddenly, since the operator no longer presses the handle 101, the elastic return movement of the telescopic spring 115 drives the limiting frame 109 to move automatically to one side of the rolling wheels 111, so that the limiting frame 109 moves between two adjacent limiting teeth 110, thereby achieving the effect of automatically limiting the limiting teeth 110 and simultaneously limiting the four rolling wheels 111, effectively preventing their accidental movement. At the same time, with the pin 301 fixing the movable frame 3, it is convenient to fix the use position and storage position of the movable frame 3.

[0050] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A four-wheel automatic brake trolley, comprising a self-locking mechanism and a bolt fixing mechanism, characterized in that: the self-locking mechanism comprises a rotating support frame one (102) for rotating support, a pressing handle (101) for manual pressing support, a pulling rod (103) for moving connection, a transmission rope (105) for transmission support, and a pulling support rope (107); and a limiting frame (109) for clamping locking; wherein one end of the pressing handle (101) is rotatably installed inside the rotating support frame one (102), the lower end of the pressing handle (101) is rotatably installed with the pulling rod (103), the rotating support frame one (102) is provided with a limiting ring groove (104) on the opposite sides, the limiting ring groove (104) is used for horizontal limiting of the pulling rod (103), and one end of the transmission rope (105) is installed at the lower end of the pulling rod (103); at least two limiting blocks (106) are installed on the outer side of the transmission rope (105), the limiting blocks (106) are both installed with the pulling support rope (107) on the opposite sides, the upper end of the pulling support rope (107) is installed with a rotating support frame two (108), the rotating support frame two (108) is rotatably connected with the limiting frame (109), and an extension spring (115) is installed on the outer side of the pulling support rope (107); the limiting frame (109) is provided with a limiting groove (114) penetrating through the outer side, the limiting groove (114) is inserted with a limiting rod (113) inside, the limiting frame (109) is installed with a rolling wheel (111) on the upper middle part, a plurality of limiting teeth (110) are installed on the two sides of the rolling wheel (111), and the limiting frame (109) is inserted between adjacent two limiting teeth (110); the bolt fixing mechanism comprises a support plate (2) for supporting articles, a moving frame (3) rotatably installed above the support plate (2), and a bolt (301) for inserting and limiting the moving frame (3).

2. The four-wheeled automatic braking stroller of claim 1, wherein, the rotating support frame one (102) is installed on the upper end of the moving frame (3), the transmission rope (105) is inserted with the support plate (2), and the lower half of the transmission rope (105) and the pulling support rope (107) are located inside the support plate (2).

3. The four-wheeled automatic braking stroller of claim 1, wherein, the limiting blocks (106) are both installed with the extension spring (115) on the opposite sides, the extension spring (115) is installed with a guide rod in the middle part, the guide rod is inserted with a limiting plate, and the limiting blocks (106) are installed on one side of the limiting plate.

4. The four-wheeled automatic braking stroller of claim 1, wherein, the support plate (2) is installed with at least four wheel frames (112) on the lower end, the two wheel frames (112) at the same horizontal position are consistent in specification, the wheel frames (112) are divided into universal wheels and fixed casters, and the universal wheels are used for steering support of the device.

5. The four-wheeled automatic braking stroller of claim 4, wherein, the limiting rod (113) is installed on the inner walls of the wheel frames (112), and the limiting frame (109) is slidably connected with the wheel frames (112) through the guide rods on the outer side.

6. The four-wheeled automatic braking stroller of claim 5, wherein, The rotating support frame two (108) is installed in the lower half of the wheel frame (112) and rotates simultaneously.

7. The four-wheeled automatic braking stroller of claim 6, wherein, The lower end of the telescopic spring (115) is provided with a fixed disc, which is installed on the lower end fixed part of the wheel frame (112).

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