Power assisting device and unlocking adjusting rotating structure of traction device on power assisting device

Abstract

The utility model relates to the field of power-assisted tractors, in particular to a power-assisted device and an unlocking, adjusting and rotating structure of a traction device on the power-assisted device. The unlocking adjusting rotating structure of the traction device comprises a lower connecting base arranged at the upper end of a lower traction frame and an upper connecting base arranged at the lower end of an upper traction frame, the upper connecting base is hinged to the lower connecting base and provided with a rotating adjusting mechanism for connection, and the upper traction frame and the upper connecting base can be rotationally adjusted relative to the lower connecting base and the lower traction frame; the rotation adjusting mechanism comprises an elastic pin assembly and a positioning hole plate which are arranged on the upper connecting base and the lower connecting base respectively. The elastic pin assembly is arranged on the outer side of the positioning hole plate, and the locking end of the elastic pin assembly faces the positioning hole plate inwards. According to the scheme, a simple elastic lock pin structure is adopted, on the basis that unlocking adjustment rotation is achieved, mistaken touch unlocking can be prevented, and use safety is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of power-assisted tractor vehicles, in particular to an assisting device and an unlocking and adjusting rotating structure of a traction device thereon. Background Art

[0002] Power-assisted tractors can effectively help people save effort in transportation, especially in complex terrains. Due to their large size and high height, the packaging volume needs to be reduced during product transportation to improve space utilization and reduce transportation costs. Most of the existing power-assisted tractors can be folded / opened in the height direction. The unlocking structure for opening / folding: one is unlocked by pressing and reset by a compression spring. For details, please refer to a shopping cart recorded in the Chinese utility model patent with the announcement number "CN210116527U", which uses a first unlocking device for unlocking by pressing; the other is unlocked by rotating and reset by a torsion spring. This type requires a large force to complete the unlocking and is designed with a long lever arm (similar to the adjustment of the car seat backrest). During use, the first unlocking scheme of the existing power-assisted tractors has a large possibility of collision, squeezing, etc., resulting in the "button" accidentally touching the unlocking, which has certain safety risks; the second scheme requires the user to keep applying force to keep it in the unlocked state during the folding or opening of the whole vehicle, which is more laborious. Summary of the invention

[0003] In order to solve the above problems, the first purpose of the utility model is to provide an unlocking and adjusting rotating structure of a traction device. This scheme adopts a simple elastic locking pin structure to achieve unlocking and adjusting rotation, and can prevent accidental unlocking to ensure safe use.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0005] The unlocking and adjusting rotating structure of the traction device comprises a lower connecting seat arranged at the upper end of the lower traction frame, and an upper connecting seat arranged at the lower end of the upper traction frame, the upper connecting seat is hinged on the lower connecting seat and is provided with a rotating adjustment mechanism, and the upper traction frame and the upper connecting seat can be rotated and adjusted relative to the lower connecting seat and the lower traction frame; it is characterized in that: the rotating adjustment mechanism comprises an elastic pin assembly and a positioning hole plate, one of the elastic pin assembly and the positioning hole plate is arranged on the upper connecting seat, and the other is arranged on the lower connecting seat; the elastic pin assembly is arranged on the outer side of the positioning hole plate, and the locking end of the elastic pin assembly faces inward toward the positioning hole plate.

[0006] The utility model adopts the above-mentioned technical solution, which relates to an unlocking and adjusting rotating structure of a traction device, and the unlocking and adjusting rotating structure is suitable for the relative folding of the lower traction frame and the upper traction frame of the traction device, so as to reduce the packaging volume. On this basis, the rotation adjustment mechanism in this solution includes an elastic pin assembly and a positioning hole plate respectively arranged on the upper connecting seat and the lower connecting seat; the scheme here realizes the positioning or unlocking adjustment of the upper connecting seat and the lower connecting seat through the cooperation of the elastic pin assembly and the positioning hole plate. Furthermore, in order to avoid the safety risks such as accidental touch and misoperation in the prior art, the elastic pin assembly is arranged on the outside of the positioning hole plate in this solution, and the locking end of the elastic pin assembly is inwardly facing the positioning hole plate, so that the elastic pin assembly is required to be pulled outward when unlocking, so as to avoid the risks caused by accidental touch and misoperation.

[0007] In the above scheme, the hole on the positioning hole plate used for positioning the elastic pin assembly includes but is not limited to a through hole, and may also include a blind hole or a groove and other structures for limiting the displacement of the elastic pin assembly. The elasticity in the elastic pin assembly may be the elasticity brought by a component with resilience such as a spring, a leaf spring, a magnetic part, a torsion spring, etc.

[0008] In summary, the above scheme adopts a simple elastic lock pin structure to achieve unlocking adjustment rotation, which can prevent accidental unlocking and ensure safe use.

[0009] In a specific embodiment, the elastic pin assembly includes a pin shaft and a return spring. The pin shaft is inserted into the side wall of the upper connecting seat or the lower connecting seat. The return spring is sleeved on the pin shaft to drive the pin shaft to elastically press inward toward the positioning hole plate. The return spring acts on the pin shaft to drive it to press against the positioning hole plate under the elastic action. As shown in the figure, a round table with a larger diameter is provided on the pin shaft. The return spring is sleeved on the pin shaft and one end of the return spring is supported on the round table.

[0010] In a further preferred solution, a pull ring is connected to the pin on the outer side of the side wall of the upper connecting seat or the lower connecting seat. In this solution, a pull ring is arranged on the pin, which can facilitate the user to pull out the pin to unlock.

[0011] Preferably, the positioning hole plate is provided with two limit retaining ribs, and a plurality of positioning holes are provided between the two limit retaining ribs; when the upper connecting seat rotates relative to the lower connecting seat, the elastic pin assembly is located between the two limit retaining ribs. In this scheme, the elastic pin assembly can only move between the two limit retaining ribs, thereby limiting the relative rotation angle between the upper connecting seat and the lower connecting seat, ensuring that the rotation angle is controllable and greatly reducing the occurrence of large collisions between parts due to excessive rotation when folding or opening, and repeated adjustment of the angle due to excessive rotation.

[0012] In a further preferred embodiment, the position-limiting baffle is constructed as an arc-shaped baffle, so that it can be matched with the elastic pin assembly. The multiple positioning holes include a first positioning hole and a second positioning hole arranged adjacent to the two arc-shaped baffles, and a plurality of third positioning holes between the first positioning hole and the second positioning hole. The first positioning hole and the second positioning hole are arranged adjacent to the two arc-shaped baffles, and are the folded gear and the maximum expanded gear, respectively, while the plurality of third positioning holes represent the optional intermediate gears. In this way, in addition to the fully expanded and fully folded states, the scheme also provides multi-gear positioning, so that the user can select the appropriate gear according to the needs.

[0013] Preferably, the upper connecting seat includes side panels on both sides of the lower connecting seat, and the side walls of the lower connecting seat are rotatably connected to the side panels of the upper connecting seat; in this solution, the two side panels of the upper connecting seat are located outside the side walls of the lower connecting seat, and the two are rotatably connected. A rotation adjustment mechanism is provided between at least one side panel and the side wall of the lower connecting seat, and the upper connecting seat and the lower connecting seat can be positioned or unlocked by the rotation adjustment mechanism.

[0014] In a further solution, a support plate is provided on the side wall of the lower connecting seat, and a rotating plate is provided on the inner side of the side plate of the upper connecting seat; the rotating plate is rotatably connected to the support plate, and the rotation support of the upper connecting seat and the lower connecting seat is realized through the connection between the rotating plate and the support plate. In addition, the support plate on at least one side is constructed as a positioning hole plate, and the elastic pin assembly passes through the rotating plate and the side plate of the side and is supported on the positioning hole plate.

[0015] Preferably, the turntable and the side plates are both provided with through holes, and the pin shafts in the elastic pin assembly are passed through the through holes of the turntable and the side plates.

[0016] In a specific implementation scheme, a shaft sleeve and a shaft rod are respectively provided at the axis centers of the turntable and the support plate, and the shaft rod is rotatably inserted into the shaft sleeve.

[0017] The second purpose of the utility model is to provide a power assisting device, comprising a bearing platform provided with wheels, and a traction device arranged on the bearing platform; the characteristic is that the traction device adopts the unlocking and adjusting rotating structure of the traction device as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the unlocking and adjusting rotation structure described in Example 1.

[0019] Figure 2 This is an exploded view of the unlocking and adjusting rotating structure described in Example 1.

[0020] Figure 3 This is a cutaway view of the unlocking and adjusting rotating structure described in Example 1.

[0021] Figure 4 This is the assembly exploded view of the rotary adjustment mechanism.

[0022] Figure 5 Schematic diagram of the installation of the turntable and elastic pin assembly.

[0023] Figure 6 It is a structural schematic diagram of the rotary adjustment mechanism.

[0024] Figure 7 It is a schematic diagram of the structure of the positioning hole plate.

[0025] Figure 8 It is a schematic diagram of the positioning of the elastic pin assembly and the positioning hole plate.

[0026] Fig. 9 This is a schematic diagram of the unfolded state of the power assist device described in Example 2.

[0027] Fig.10 This is a schematic diagram of the folded state of the power assist device described in Example 2. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. Example

[0033] like Figures 1 to 8 As shown, this embodiment relates to an unlocking and adjusting rotating structure of a traction device, including a lower connecting seat 10 arranged at the upper end of a lower traction frame 1, and an upper connecting seat 20 arranged at the lower end of an upper traction frame 2, the upper connecting seat 20 is hinged on the lower connecting seat 10 and is provided with a rotating adjustment mechanism, and the upper traction frame 2 and the upper connecting seat 20 can be rotated and adjusted relative to the lower connecting seat 10 and the lower traction frame 1. The rotating adjustment mechanism includes an elastic pin assembly 3 and a positioning hole plate 4 respectively arranged on the upper connecting seat 20 and the lower connecting seat 10. The elastic pin assembly 3 is arranged on the outer side of the positioning hole plate 4, and the locking end of the elastic pin assembly 3 faces inwardly toward the positioning hole plate 4. The unlocking and adjusting rotating structure is suitable for the lower traction frame 1 and the upper traction frame 2 of the traction device to be relatively folded, so as to reduce the packaging volume. On this basis, the rotating adjustment mechanism in this scheme includes an elastic pin assembly 3 and a positioning hole plate 4 respectively arranged on the upper connecting seat 20 and the lower connecting seat 10. The scheme here realizes the positioning or unlocking adjustment of the upper connecting seat 20 and the lower connecting seat 10 by cooperating with the elastic pin assembly 3 and the positioning hole plate 4. Furthermore, in order to avoid the safety risks such as accidental touch and misoperation in the prior art, the elastic pin assembly 3 is arranged on the outside of the positioning hole plate 4 in this scheme, and the locking end of the elastic pin assembly 3 is inwardly facing the positioning hole plate 4, so that the elastic pin assembly 3 is required to be pulled outward when unlocking, so as to avoid the risks caused by accidental touch and misoperation of unlocking. In summary, the above scheme adopts a simple elastic locking pin structure to prevent accidental touch and unlocking on the basis of realizing the unlocking adjustment rotation, thereby ensuring safety in use.

[0034] The inner and outer positions of the upper connecting seat 20 and the lower connecting seat 10 in the above scheme can be interchanged, but the elastic pin assembly 3 is required to be set on the outside and the positioning hole plate 4 is set on the inside. In this way, the pull-to-unlock method is adopted, which can facilitate operation and avoid the risk of accidental touch.

[0035] exist Figures 2~5 In the specific solution shown, the upper connecting seat 20 includes side panels 21 located on both sides of the lower connecting seat 10, and the side walls of the lower connecting seat 10 are rotatably connected to the side panels 21 of the upper connecting seat 20. In this solution, the two side panels 21 of the upper connecting seat 20 are located outside the side walls of the lower connecting seat 10, and the two are rotatably connected. A rotation adjustment mechanism is provided between at least one side panel 21 and the side wall of the lower connecting seat 10, and the positioning or unlocking adjustment of the upper connecting seat 20 and the lower connecting seat 10 can be achieved through the rotation adjustment mechanism.

[0036] In a further solution, a support disk 11 is provided on the side wall of the lower connecting seat 10, and a rotating disk 22 is provided on the inner side of the side plate 21 of the upper connecting seat 20. The rotating disk 22 is rotatably connected to the support disk 11, and the rotation support of the upper connecting seat 20 and the lower connecting seat 10 is realized by the connection between the rotating disk 22 and the support disk 11. The specific solution is that the axis of the rotating disk 22 and the support disk 11 are respectively provided with a sleeve 111 and a shaft rod 221, and the shaft rod 221 is rotatably penetrated inside the sleeve 111. In addition, the support disk 11 on at least one side is constructed as a positioning hole plate 4, and the elastic pin assembly 3 passes through the rotating disk 22 and the side plate 21 on this side and is supported on the positioning hole plate 4.

[0037] In such Figure 4 and 6 In the specific embodiment shown, the elastic pin assembly 3 includes a pin shaft 31 and a return spring 32. The pin shaft 31 is inserted into the side wall of the upper connecting seat 20 or the lower connecting seat 10. The rotating disk 22 and the side plate 21 are both provided with through holes 222. The pin shaft 31 in the elastic pin assembly 3 is inserted into the through holes 222 of the rotating disk 22 and the side plate 21. The return spring 32 is sleeved on the pin shaft 31 to drive the pin shaft 31 to elastically press inward toward the positioning hole plate 4. The return spring 32 acts on the pin shaft 31 to drive it to press against the positioning hole plate 4 under the action of elasticity. Specifically, as shown in the figure, a round table 311 with a larger diameter is provided on the pin shaft 31. The return spring 32 is sleeved on the pin shaft 31 and one end of the return spring 32 is supported on the round table 311. The return spring 32 and the pin shaft 31 in the above scheme are separate structures, but in an alternative scheme, the elastic pin assembly includes a pin and an elastic part, and the pin and the elastic part are an integral structure, such as elastic rubber is integrally injection-molded on the pin; that is, the various parts of the elastic pin assembly can be either separate or integral.

[0038] In a further preferred solution, a pull ring 33 is connected to the pin 31 on the outer side of the side wall of the upper connecting seat 20 or the lower connecting seat 10. In this solution, the pull ring 33 is provided on the pin 31, which can facilitate the user to pull out the pin 31 to unlock. In another alternative solution, the pin can be driven axially by a magnetic member through magnetic force, such as the magnetic member causes the locking end of the pin to rebound and reset through magnetic force.

[0039] like Figure 7 and 8 As shown, the positioning hole plate 4 is provided with two limiting ribs 41, and a plurality of positioning holes are provided between the two limiting ribs 41. When the upper connecting seat 20 rotates relative to the lower connecting seat 10, the elastic pin assembly 3 is located between the two limiting ribs 41. In the scheme here, the elastic pin assembly 3 can only move between the two limiting ribs 41, thereby limiting the relative rotation angle between the upper connecting seat 20 and the lower connecting seat 10, ensuring that the rotation angle is controllable and greatly reducing the occurrence of large collisions between parts due to excessive rotation when folding or opening, and repeated adjustment of angles due to excessive rotation. In a further preferred scheme, the limiting rib 41 is constructed as an arc-shaped baffle, so that it can be adapted to the elastic pin assembly 3. The plurality of positioning holes include a first positioning hole 42 and a second positioning hole 43 arranged adjacent to the two arc-shaped baffles, and a plurality of third positioning holes 44 between the first positioning hole 42 and the second positioning hole 43. The first positioning hole 42 and the second positioning hole 43 are arranged near the two arc-shaped baffles, which are the folded gear and the maximum expanded gear respectively, and the third positioning holes 44 represent the optional intermediate gears. In addition to the fully expanded and fully folded states, this solution also provides multi-gear positioning, so that users can choose the appropriate gear according to their needs.

[0040] In summary, the unlocking and adjusting rotating structure can be used to control the rotation and positioning between the upper traction frame 2 and the lower traction frame 1. When unlocking, the user pulls out the pin 31 through the pull ring 33. During the relative rotation of the upper connecting seat 20 and the lower connecting seat 10, the user can release the force applied to the elastic pin pull ring 33. At this time, the end face of the pin 31 is in close contact with the outer wall of the positioning hole plate 4, and relative sliding occurs. When the center of the first positioning hole 42, the second positioning hole 43 or the third positioning hole 44 coincides with the center of the pin 31, the pin 31 is locked in under the action of the reset spring 32, so that the upper traction frame 2 and the lower traction frame 1 cannot rotate. Example

[0041] like Fig. 9 and 10 This embodiment provides a power assist device, including a carrying platform 5 provided with wheels 50, and a traction device provided on the carrying platform 5. The traction device adopts the unlocking and adjusting rotation structure of the traction device described in Embodiment 1.

[0042] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0043] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. An unlocking and adjusting rotating structure of a traction device, comprising a lower connecting seat (10) arranged at the upper end of a lower traction frame (1), and an upper connecting seat (20) arranged at the lower end of an upper traction frame (2), wherein the upper connecting seat (20) is hingedly connected to the lower connecting seat (10) and is provided with a rotating adjustment mechanism, and the upper traction frame (2) and the upper connecting seat (20) can be rotated and adjusted relative to the lower connecting seat (10) and the lower traction frame (1); characterized in that: The rotation adjustment mechanism comprises an elastic pin assembly (3) and a positioning hole plate (4), one of the elastic pin assembly (3) and the positioning hole plate (4) being arranged on an upper connecting seat (20) and the other being arranged on a lower connecting seat (10); the elastic pin assembly (3) is arranged outside the positioning hole plate (4), and a locking end of the elastic pin assembly (3) faces inwardly toward the positioning hole plate (4).

2. The unlocking and adjusting rotating structure of the traction device according to claim 1, characterized in that: The elastic pin assembly (3) comprises a pin shaft (31) and a return spring (32); the pin shaft (31) is inserted through a side wall of the upper connecting seat (20) or the lower connecting seat (10); the return spring (32) is sleeved on the pin shaft (31) to drive the pin shaft (31) to elastically press inwardly toward the positioning hole plate (4).

3. The unlocking and adjusting rotating structure of the traction device according to claim 2, characterized in that: A pull ring (33) is connected to the pin shaft (31) on the outer side of the side wall of the upper connecting seat (20) or the lower connecting seat (10).

4. The unlocking and adjusting rotating structure of the traction device according to any one of claims 1 to 3, characterized in that: The positioning hole plate (4) is provided with two limiting retaining ribs (41), and a plurality of positioning holes are provided between the two limiting retaining ribs (41); when the upper connecting seat (20) rotates relative to the lower connecting seat (10), the elastic pin assembly (3) is located between the two limiting retaining ribs (41).

5. The unlocking and adjusting rotating structure of the traction device according to claim 4, characterized in that: The position-limiting baffle (41) is constructed as an arc-shaped baffle, and the plurality of positioning holes include a first positioning hole (42) and a second positioning hole (43) arranged adjacent to the two arc-shaped baffles, and a plurality of third positioning holes (44) located between the first positioning hole (42) and the second positioning hole (43).

6. The unlocking and adjusting rotating structure of the traction device according to claim 1, characterized in that: The upper connecting seat (20) comprises side plates (21) located on both sides of the lower connecting seat (10); the side walls of the lower connecting seat (10) and the side plates (21) of the upper connecting seat (20) are rotatably connected; and a rotation adjustment mechanism is provided between at least one side plate (21) and the side wall of the lower connecting seat (10).

7. The unlocking and adjusting rotating structure of the traction device according to claim 6, characterized in that: A support plate (11) is arranged on the side wall of the lower connecting seat (10), and a rotating plate (22) is arranged on the inner side of the side plate (21) of the upper connecting seat (20); the rotating plate (22) is rotatably connected to the support plate (11), and the support plate (11) on at least one side is constructed as a positioning hole plate (4), and the elastic pin assembly (3) passes through the rotating plate (22) and the side plate (21) on this side and is supported on the positioning hole plate (4).

8. The unlocking and adjusting rotating structure of the traction device according to claim 7, characterized in that: The rotating disk (22) and the side plate (21) are both provided with through holes (222), and the pin shafts (31) in the elastic pin assembly (3) are inserted into the through holes (222) of the rotating disk (22) and the side plate (21).

9. The unlocking and adjusting rotating structure of the traction device according to claim 7, characterized in that: A shaft sleeve (111) and a shaft rod (221) are respectively arranged at the axis centers of the rotating disk (22) and the supporting disk (11), and the shaft rod (221) is rotatably inserted into the shaft sleeve (111).

10. A power assist device, comprising a load-bearing platform (5) provided with wheels (50), and a traction device provided on the load-bearing platform (5); characterized in that: The traction device adopts the unlocking and adjusting rotating structure of the traction device according to any one of claims 1 to 9.

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