Chain-assisted knee bend steering mechanism and stroller

Abstract

The utility model discloses a kind of chain-assisted waist folding steering mechanism and trolley, belong to steering technical field, waist folding steering mechanism includes support frame, bogie and transmission chain, the support frame is used to install on first component, the bogie is used to install on second component, the bogie is rotatably connected with one end of the support frame by pivot, the pivot is rotated by the transmission chain drive, so that the first component and the second component can produce relative deflection.The utility model drives mutual rotation between bogie and support frame by setting transmission chain, can reduce the turning radius of trolley, so that trolley steering is more convenient and labor-saving, increase the flexibility of trolley use, meanwhile, the waist folding steering mechanism uses transmission chain to realize power transmission, not easy to slip, enhance the stability of use.

Description

Technical Field

[0001] This utility model relates to the field of steering technology, and in particular to a chain-assisted folding steering mechanism and a trolley. Background Technology

[0002] With the booming development of the modern construction industry, the scale of buildings is constantly expanding, and the environment of construction sites is becoming increasingly complex and changeable. Therefore, the handling of lightweight items such as parts, equipment, and materials on construction sites requires handling equipment with sufficient flexibility, portability, and stability. Especially in complex, busy, and harsh construction environments, traditional handling equipment is inadequate, necessitating more portable and agile equipment to complete the transportation and handling of items. To this end, an innovative four-wheeled trolley with a folding and steering mechanism for construction sites has emerged, fully meeting the needs of construction sites for handling equipment. In addition to requiring sufficient flexibility, portability, and stability, the equipment must also effectively improve work efficiency, reduce the physical burden on workers, and lower construction costs. Such equipment can greatly improve work efficiency and quality, better meet the development needs of the modern construction industry, and become an indispensable handling tool on construction sites.

[0003] Traditional construction site wheelbarrows typically employ suspension or steering plate mechanisms for steering, but these have several drawbacks: Large turning radius: Traditional construction site wheelbarrows have a large turning radius, making them difficult to operate. Heavy mechanism weight: Suspension or steering plate mechanisms have complex structures, requiring large amounts of steel or other heavy materials for manufacturing, resulting in a heavy overall steering mechanism that negatively impacts the wheelbarrow's driving efficiency and stability. Difficult maintenance. Weak light load capacity: When carrying heavy loads, the steering mechanism cannot meet the driving requirements of the wheelbarrow, making it prone to tipping over and other safety issues. Utility Model Content

[0004] The present invention aims to solve the problems of insufficient steering flexibility and inconvenience of traditional construction site handcarts by providing a chain-assisted bending steering mechanism and handcart, which has the advantages of strong stability, small turning radius, and flexible control due to chain-assisted steering.

[0005] Firstly, to achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A chain-assisted folding steering mechanism includes a support frame, a bogie, and a drive chain. The bogie is rotatably connected to one end of the support frame via a pivot. The drive chain is used to pull the bogie to rotate around the pivot. A drive sprocket is also meshed on the drive chain. A first connector and a second connector are respectively provided on both sides of the bogie. One end of the drive chain is connected to the first connector, and the other end is connected to the second connector.

[0007] Preferably, the support frame is also equipped with multiple guide sprockets, which are evenly distributed on the outer side of the support frame, and the transmission chain is sleeved on all the guide sprockets.

[0008] Preferably, the portion of the transmission chain near the first connector is the first chain segment, and the portion of the chain near the second connector is the second chain segment, with the included angle between the first chain segment and the second chain segment not exceeding 30°.

[0009] Preferably, the drive sprocket is mounted at the end opposite to the bogie.

[0010] Secondly, to achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0011] A trolley includes a rear section and a front section that are separately arranged. A folding steering mechanism as described in the first aspect is installed between the rear section and the front section. The support frame of the folding steering mechanism is installed at the rear section, and the steering frame is installed at the front section. The folding steering mechanism drives the front section and the rear section to deflect relative to each other.

[0012] Preferably, a steering handle is installed at the rear of the vehicle, a connecting shaft is installed at the rotating part of the steering handle, and the other end of the connecting shaft is connected to the drive sprocket of the folding steering mechanism.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. By setting a transmission chain to drive the bogie and support frame to rotate relative to each other, this mechanism can reduce the turning radius of the handcart used on construction sites, making the handcart more convenient and labor-saving to turn, and increasing the flexibility of the handcart. At the same time, the bending steering mechanism uses a transmission chain to transmit power, which is not easy to slip and enhances the stability of use.

[0015] 2. This design utilizes a drive sprocket to drive the transmission chain, reducing the force and labor intensity applied to the trolley body during steering, and also resulting in less friction loss and wear, thereby extending the vehicle's service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the bending steering mechanism of this utility model.

[0017] Figure 2 This is a bottom view of the structure of the bending and turning mechanism of this utility model installed on a trolley.

[0018] Figure 3 This is a side view of the structure of the bending and turning mechanism of this utility model installed on a trolley.

[0019] In the diagram: 1. Support frame, 2. Bogie, 3. Drive sprocket, 4. Shaft, 5. Drive chain, 6. Guide sprocket, 7. First connector, 8. Second connector, 9. Rear of vehicle, 10. Front of vehicle, 11. Steering handle, 12. Connecting shaft. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] Example 1

[0022] like Figure 1 As shown, a chain-assisted folding steering mechanism is disclosed, including a support frame 1, a bogie 2 and a transmission chain 5. The bogie 2 is rotatably connected to one end of the support frame 1 via a rotating shaft 4. The transmission chain 5 is used to pull the bogie 2 to rotate around the rotating shaft 4. A drive sprocket 3 is also meshed on the transmission chain 5. A first connecting member 7 and a second connecting member 8 are respectively provided on both sides of the bogie 2. One end of the transmission chain 5 is connected to the first connecting member 7 and the other end is connected to the second connecting member 8. The folding steering mechanism utilizes the relative rotation between the bogie 2 and the support frame 1 to achieve turning of the two components. Taking a trolley as an example, the front wheel of the trolley is responsible for steering, and the body is responsible for carrying the load. The bogie 2 is installed at the front wheel of the trolley, and the support frame 1 is installed at the body. When the bogie 2 and the support frame 1 rotate relative to each other, the front wheel can achieve steering operation. Compared with traditional trolleys, the vehicle can be easily controlled to turn when pushed from behind. In order to achieve relative rotation of the bogie 2, the bogie 2 and the support frame 1 of this application are connected by a rotating shaft 4, and the drive mechanism is realized by a combination of a drive sprocket 3 and a transmission chain 5. The transmission chain 5 is less prone to slippage than the traditional belt drive, making the folding steering mechanism more precise in steering and more stable in control.

[0023] There are many ways in which the drive chain 5 can drive the bogie 2 to rotate relative to each other, and the drive chain 5 itself also needs to be driven by an additional drive mechanism, such as... Figure 1As shown, this application utilizes a drive sprocket 3 as the drive mechanism. A first connecting member 7 and a second connecting member 8 are respectively provided on both sides of the bogie 2. One end of the transmission chain 5 is connected to the first connecting member 7, and the other end is connected to the second connecting member 8. The drive sprocket 3 is also meshed on the transmission chain 5. The rotation of the drive sprocket 3 drives the transmission chain 5 to pull the first connecting member 7 or the second connecting member 8, causing the bogie 2 to rotate around the shaft 4. The transmission chain 5 does not directly contact the shaft 4, but rather through connecting members on both sides of the bogie 2. Pulling the connecting members allows the bogie 2 to rotate. The transmission chain 5 is a complete chain, with both ends used to connect the first connecting member 7 and the second connecting member 8, forming a closed geometric structure. Thus, when the drive sprocket 3 rotates, it can move the transmission chain 5, thereby pulling the first connecting member 7 and the second connecting member 8 at both ends. Figure 1 As shown, when the drive sprocket 3 rotates clockwise, the transmission chain 5 swings counterclockwise, pulling the first connecting piece 7 to swing to the left, thus enabling the bogie 2 to rotate. Conversely, when the drive sprocket 3 rotates counterclockwise, the transmission chain 5 swings clockwise, pulling the second connecting piece 8 to swing to the left, thereby achieving right or left turning.

[0024] like Figure 1 As shown, to ensure a smoother and more reliable power transmission of the drive chain 5, multiple guide sprockets 6 are installed on the support frame 1. The guide sprockets 6 are evenly distributed on the outer side of the support frame 1. The drive chain 5 is fitted onto all the guide sprockets 6. The guide sprockets 6 can change the direction of the drive chain 5 and also serve as supports for the drive chain 5, allowing it to form a specific trajectory to meet the installation design requirements of the drive chain 5. As mentioned above, the guide sprockets 6 can change the direction of the drive chain 5, and the force transmission direction of the drive chain 5 is related to the formed trajectory. The part of the drive chain 5 near the first connecting member 7 is the first chain segment, and the part near the second connecting member 8 is the second chain segment. The angle between the first chain segment and the second chain segment does not exceed 30°. Since the drive chain 5 achieves the rotation of the bogie 2 by traction of the first connecting member 7 and the second connecting member 8, the traction force can be maximized when it is perpendicular to the connecting member. Figure 1 The force in the middle tends to be in the horizontal direction, so in order to ensure that the traction force is not dispersed, the two chain segments need to be close to parallel. Otherwise, if the included angle is too large, the force will be dispersed to the vertical direction, resulting in a weaker traction force. Controlling the rotation of the bogie 2 will require more force, which is not convenient for saving effort. If the included angle between the first chain segment and the second chain segment does not exceed 30°, the dispersion of traction force can be effectively avoided. The length of the two connecting parts will also affect the included angle between the first chain segment and the second chain segment. Therefore, the guide sprocket 6 changes the direction of the transmission chain 5, which can reasonably control the included angle between the first chain segment and the second chain segment within 30°.

[0025] The drive sprocket 3 is installed at the end opposite to the bogie 2. As we know from the above, the transmission sprocket 5 forms a closed shape, and the two ends of the transmission chain 5 are respectively connected to the first connector 7 and the second connector 8. No matter which connector the drive sprocket 3 is close to, the chain segment will be subjected to compressive force, resulting in uneven force at both ends and affecting the service life of the transmission chain 5. Therefore, the installation position of the drive sprocket 3 is set relative to the bogie 2, so as not to affect the service life of the connection with the connector.

[0026] Example 2

[0027] like Figure 2 and Figure 3 As shown, a trolley is disclosed, comprising a rear section 9 and a front section 10 separately arranged. A folding steering mechanism, as described in Embodiment 1, is installed between the rear section 9 and the front section 10. The support frame 1 of the folding steering mechanism is installed on the rear section 9, and the steering frame 2 is installed on the front section 10. The folding steering mechanism drives the front section 10 and the rear section 9 to produce relative deflection. Compared with traditional trolleys, this trolley is easier to steer, with turning operations achieved by the front section 10, and the user pushing the trolley forward from the rear section 9. A steering handle 11 is installed at the rear 9 of the vehicle. A connecting shaft 12 is installed at the rotating part of the steering handle 11. The other end of the connecting shaft 12 is connected to the drive sprocket 3 of the folding steering mechanism. The user controls the steering operation of the front 10 of the vehicle by controlling the steering handle 11 at the rear 9 of the vehicle. When the steering handle 11 is turned, the connecting shaft 12 rotates accordingly. The connecting shaft 12 transmits the rotational force to the drive sprocket 3, causing the drive sprocket 3 to rotate, thereby driving the transmission chain 5 to pull the bogie 2 to deflect. The bogie 2 moves the front 10 of the vehicle, realizing the steering operation of the trolley.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A chain-assisted bending steering mechanism, characterized in that, The system includes a support frame (1), a bogie (2), and a drive chain (5). The bogie (2) is rotatably connected to one end of the support frame (1) via a rotating shaft (4). The drive chain (5) is used to pull the bogie (2) to rotate around the rotating shaft (4). A drive sprocket (3) is also meshed on the drive chain (5). A first connector (7) and a second connector (8) are respectively provided on both sides of the bogie (2). One end of the drive chain (5) is connected to the first connector (7), and the other end is connected to the second connector (8).

2. The chain-assisted bending steering mechanism according to claim 1, characterized in that, The support frame (1) is also equipped with multiple guide sprockets (6), which are evenly distributed on the outside of the support frame (1), and the transmission chain (5) is sleeved on all the guide sprockets (6).

3. The chain-assisted bending steering mechanism according to claim 2, characterized in that, The portion of the transmission chain (5) closest to the first connector (7) is the first chain segment, and the portion of the chain closest to the second connector (8) is the second chain segment. The angle between the first chain segment and the second chain segment does not exceed 30°.

4. The chain-assisted bending steering mechanism according to claim 2, characterized in that, The drive sprocket (3) is installed at the end opposite to the bogie (2).

5. A small cart, characterized in that, The vehicle includes a rear section (9) and a front section (10) that are separately configured. A slack steering mechanism according to any one of claims 1-4 is installed between the rear section (9) and the front section (10). The support frame (1) of the slack steering mechanism is installed on the rear section (9), and the bogie (2) is installed on the front section (10). The slack steering mechanism drives the front section (10) and the rear section (9) to deflect relative to each other.

6. A trolley according to claim 5, characterized in that, A steering handle (11) is installed at the rear of the vehicle (9). A connecting shaft (12) is installed at the rotating part of the steering handle (11). The other end of the connecting shaft (12) is connected to the drive sprocket (3) of the folding steering mechanism.

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