Cart rear wheel turning positioning structure

Abstract

The utility model discloses a cart rear wheel overturning and positioning structure, which belongs to the technical field of cart rear wheels, and is characterized by comprising a cart body, two first pulleys and two second pulleys are respectively arranged on the front side and the rear side of the bottom of the cart body, an overturning frame is arranged on the rear side of the cart body, and the first pulleys and the second pulleys are arranged on the overturning frame. Two positioning mechanisms are arranged at the bottom of the turnover frame, and a handrail is fixedly connected to the rear side of the cart body. The positioning mechanism comprises a limiting block, a positioning block and a connecting block, the bottom of the limiting block is fixedly connected with the top of the positioning block, and the problems that most existing cart rear wheel positioning structures do not have the reverse rotation function, when the cart rear wheels are positioned, the positioning structure and the cart rear wheels are fixed together for positioning, the positioning effect is poor, and the positioning effect is poor are solved. And the positioning structure of the rear wheels of the cart is not easy to adjust and is easy to rub with the rear wheels of the cart in the moving process of the rear wheels of the cart, so that the positioning structure is seriously abraded, and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of rear wheels of carts, in particular to a flipping and positioning structure of rear wheels of carts. Background Art

[0002] The directional wheel is the rear wheel of the cart. It generally does not drive the vehicle to move, but only serves as a steering function. The directional wheel controls the steering angle and direction through the front steering system. It is usually designed with some special suspension mechanisms and steering gears to ensure steering stability and accuracy. Since the directional wheel is not constrained by the drive motor, a smaller wheel is usually used to reduce the weight and energy consumption of the vehicle.

[0003] Most of the existing rear wheel positioning structures of the cart do not have a reversing function. When positioning the rear wheel of the cart, the positioning structure is fixed together with the rear wheel of the cart for positioning, and the positioning effect is poor. In addition, the rear wheel positioning structure of the cart is not easy to adjust, and it is easy to rub against the rear wheel of the cart during the movement of the rear wheel of the cart, causing serious wear of the positioning structure. Utility Model Content

[0004] The utility model provides a flip positioning structure for the rear wheel of a cart, aiming to solve the problem that most existing rear wheel positioning structures of the cart do not have a reversing function, and when positioning the rear wheel of the cart, the positioning effect is poor by using the positioning structure fixed together with the rear wheel of the cart, and the rear wheel positioning structure of the cart is not easy to adjust, and it is easy to rub against the rear wheel of the cart during the movement of the rear wheel of the cart, causing serious wear of the positioning structure.

[0005] The utility model is implemented as follows: the rear wheel flip positioning structure of the cart comprises a cart body, two first pulleys and two second pulleys are respectively arranged at the front side and the rear side of the bottom of the cart body, a flip frame is arranged at the rear side of the cart body, two positioning mechanisms are arranged at the bottom of the flip frame, and a handrail is fixedly connected to the rear side of the cart body;

[0006] The positioning mechanism includes a limit block, a positioning block and a connecting block, the bottom of the limit block is fixedly connected to the top of the positioning block, the bottom of the positioning block is in close contact with the surface of the second pulley, and the front side of the connecting block is in contact with the rear side of the limit block.

[0007] In order to achieve the effect of conveniently adjusting the limit block, as a preferred flip positioning structure of the cart rear wheel of the utility model, a hinge is provided at the bottom of the connecting block, and the connection between the limit block and the connecting block is rotatably connected by the hinge.

[0008] In order to achieve the effect of assisting the positioning of the second pulley, as a preferred flipping positioning structure of the rear wheel of the cart of the present invention, the bottom of the limit block is fixedly connected with an auxiliary frame, and the front side of the auxiliary frame contacts the rear side of the second pulley.

[0009] In order to facilitate the movement of the limit block, as a preferred structure for flipping and positioning the rear wheel of the cart of the utility model, a positioning block is fixedly connected to the rear side of the second pulley, an adjustment block is arranged at the bottom of the positioning block, and the bottom of the adjustment block is in close contact with the top of the limit block.

[0010] In order to facilitate the limiting effect of the adjustment block, as a preferred structure for flipping and positioning the rear wheel of the cart of the utility model, the bottom of the positioning block is slidably connected with three movable columns, the bottom of the movable column is fixedly connected to the top of the adjustment block, and the surface of the movable column is provided with a spring.

[0011] In order to facilitate the rotation of the flip frame, as a preferred flip positioning structure for the rear wheel of the cart of the present invention, the surface of the flip frame is rotatably connected to two bearings, and the opposite sides of the two bearings extend to the two sides of the cart body respectively and are fixedly connected to the two sides of the cart body.

[0012] In order to achieve the effect of limiting the turning frame, as a preferred flipping positioning structure of the cart rear wheel of the utility model, both sides of the cart body are fixedly connected to limiting columns, and the surface of the limiting columns contacts the surface of the turning frame.

[0013] In order to achieve the effect of fixing the flip frame, as a preferred flip positioning structure of the cart rear wheel of the utility model, a connecting sleeve is fixedly connected to the surface of the flip frame, and a magnetic suction block is fixedly connected to the rear side of the cart body.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The rear wheel flipping and positioning structure of the cart can fix the armrest on the rear side of the cart body, so that the armrest can drive the cart body to move to an appropriate position through the first pulley and the second pulley respectively, and then the flip frame can be rotated on both sides of the cart body, so that the flip frame drives the connecting block to move, and the connecting block drives the limiting block to move, so that the limiting block drives the positioning block to move to the inside of the second pulley under the adjustment of the connecting block, so that the bottom of the positioning block can be closely contacted with the inside of the second pulley, so that the positioning block can position the second pulley, so as to solve the problem that most existing rear wheel positioning structures of the cart do not have a reversing function. When positioning the rear wheel of the cart, the positioning structure is fixed together with the rear wheel of the cart for positioning, but the positioning effect is poor, and the rear wheel positioning structure of the cart is not easy to adjust, and it is easy to rub against the rear wheel of the cart during the movement of the rear wheel of the cart, causing serious wear of the positioning structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the overall structural diagram of the cart rear wheel flip positioning structure of the utility model;

[0017] Figure 2 It is a three-dimensional connection schematic diagram of the connecting sleeve and the turning frame in the utility model;

[0018] Figure 3 It is a three-dimensional connection schematic diagram of the positioning mechanism in the utility model;

[0019] Figure 4 It is a three-dimensional connection schematic diagram of the connecting block and the hinge in the utility model;

[0020] Figure 5 It is a schematic diagram of the three-dimensional connection between the moving column and the adjusting block in the utility model.

[0021] In the figure, 1. trolley body; 2. first pulley; 3. magnetic block; 4. turning frame; 5. positioning mechanism; 501. limit block; 502. positioning block; 503. connecting block; 6. handrail; 7. bearing; 8. limit column; 9. positioning block; 10. auxiliary frame; 11. connecting sleeve; 12. hinge; 13. adjusting block; 14. moving column; 15. spring; 16. second pulley. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0024] See also Figure 1-5 The utility model provides a technical solution: a rear wheel flip positioning structure of a cart, comprising a cart body 1, two first pulleys 2 and two second pulleys 16 are respectively arranged on the front and rear sides of the bottom of the cart body 1, a flip frame 4 is arranged on the rear side of the cart body 1, two positioning mechanisms 5 are arranged at the bottom of the flip frame 4, and a handrail 6 is fixedly connected to the rear side of the cart body 1;

[0025] The positioning mechanism 5 includes a limit block 501, a positioning block 502 and a connecting block 503. The bottom of the limit block 501 is fixedly connected to the top of the positioning block 502, the bottom of the positioning block 502 is in close contact with the surface of the second pulley 16, and the front side of the connecting block 503 is in contact with the rear side of the limit block 501.

[0026] In this embodiment: by fixing the armrest 6 on the rear side of the cart body 1, the armrest 6 can drive the cart body 1 to move to an appropriate position through the first pulley 2 and the second pulley 16 respectively, and then the flip frame 4 is rotated on both sides of the cart body 1, so that the flip frame 4 drives the connecting block 503 to move, and the connecting block 503 drives the limit block 501 to move, so that the limit block 501 drives the positioning block 502 to move to the inside of the second pulley 16 under the adjustment of the connecting block 503, so that the bottom of the positioning block 502 can be closely contacted with the inside of the second pulley 16, and the positioning block 502 can position the second pulley 16.

[0027] As a technical optimization solution of the present invention, a hinge 12 is provided at the bottom of the connecting block 503 , and the connection between the limiting block 501 and the connecting block 503 is rotatably connected via the hinge 12 .

[0028] In this embodiment, by rotatably connecting the connection between the limit block 501 and the connection block 503 through the hinge 12, the limit block 501 can be adjusted under the rotation of the hinge 12, thereby achieving the effect of convenient adjustment of the limit block 501.

[0029] As a technical optimization solution of the present invention, the bottom of the limit block 501 is fixedly connected to the auxiliary frame 10 , and the front side of the auxiliary frame 10 is in contact with the rear side of the second pulley 16 .

[0030] In this embodiment, by making the rear side of the second pulley 16 contact with the front side of the auxiliary frame 10, the auxiliary frame 10 can assist in positioning the second pulley 16, thereby achieving the effect of assisting in positioning the second pulley 16.

[0031] As a technical optimization solution of the utility model, a positioning block 9 is fixedly connected to the rear side of the second pulley 16 , an adjusting block 13 is provided at the bottom of the positioning block 9 , and the bottom of the adjusting block 13 is in close contact with the top of the limiting block 501 .

[0032] In this embodiment, by fixing the front side of the positioning block 9 to the rear side of the second pulley 16 , the limit block 501 can be conveniently moved to the bottom of the adjustment block 13 through the positioning block 9 , thereby achieving the effect of facilitating the movement of the limit block 501 .

[0033] As a technical optimization solution of the utility model, three moving columns 14 are slidably connected to the bottom of the alignment block 9 , the bottom of the moving column 14 is fixedly connected to the top of the adjustment block 13 , and a spring 15 is provided on the surface of the moving column 14 .

[0034] In this embodiment, by arranging the spring 15 between the alignment block 9 and the opposite side of the adjustment block 13 , the spring 15 can limit the adjustment block 13 through the movable column 14 , thereby achieving the effect of facilitating the limitation of the adjustment block 13 .

[0035] As a technical optimization solution of the utility model, the surface of the flip frame 4 is rotatably connected to two bearings 7 , and opposite sides of the two bearings 7 extend to both sides of the cart body 1 and are fixedly connected to both sides of the cart body 1 .

[0036] In this embodiment, by rotatably connecting the inside of the bearing 7 with the surface of the overturning frame 4 , the overturning frame 4 can be rotated on both sides of the cart body 1 through the bearing 7 , thereby facilitating the rotation of the overturning frame 4 .

[0037] As a technical optimization solution of the utility model, both sides of the cart body 1 are fixedly connected with limiting columns 8 , and the surface of the limiting columns 8 is in contact with the surface of the turning frame 4 .

[0038] In this embodiment, by fixing the limiting posts 8 on both sides of the cart body 1 , the limiting posts 8 can be conveniently used to limit the turning frame 4 , thereby achieving the effect of limiting the turning frame 4 .

[0039] As a technical optimization solution of the present utility model, a connecting sleeve 11 is fixedly connected to the surface of the flip frame 4, and a magnetic suction block 3 is fixedly connected to the rear side of the cart body 1.

[0040] In this embodiment, the surface of the connecting sleeve 11 is magnetically attracted to the rear side of the magnetic block 3 , so that the turning frame 4 can be fixed by the connecting sleeve 11 , thereby achieving the effect of fixing the turning frame 4 .

[0041] Working principle: First, the handrail 6 drives the trolley body 1 to move to the appropriate position through the first pulley 2 and the second pulley 16 respectively, so that the flip frame 4 rotates on both sides of the trolley body 1 through the bearing 7, so that the rear side of the magnetic block 3 is away from the front side of the connecting sleeve 11, thereby canceling the limit of the flip frame 4, so that it is convenient for the flip frame 4 to drive the connecting block 503 to move, and the connecting block 503 drives the limit block 501 to move through the hinge 12, so that the limit block 501 drives the positioning block 502 to move under the adjustment of the connecting block 503, so that the rear side of the limit block 501 contacts the front side of the sequential block 9, so that it is convenient for the limit block 501 to drive the positioning block 502 to move to the inside of the second pulley 16, so that the auxiliary frame 10 can be aligned with the auxiliary frame 10. The second pulley 16 performs auxiliary positioning, and then the limit block 501 drives the adjustment block 13 to move upward through the moving column 14, so that the adjustment block 13 fixes the limit block 501 under the limit of the spring 15, so that the bottom of the positioning block 502 is in close contact with the inside of the second pulley 16, thereby achieving the effect of positioning the second pulley 16 by the positioning block 502, solving the problem that most existing rear wheel positioning structures of the cart do not have a reversing function. When positioning the rear wheel of the cart, the positioning effect is poor by using the positioning structure fixed together with the rear wheel of the cart for positioning, and the rear wheel positioning structure of the cart is not easy to adjust. It is easy to rub against the rear wheel of the cart during the movement of the rear wheel of the cart, causing the positioning structure to wear more seriously.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cart rear wheel flipping and positioning structure, comprising a cart body (1), characterized in that: Two first pulleys (2) and two second pulleys (16) are respectively arranged on the front and rear sides of the bottom of the cart body (1); a turning frame (4) is arranged on the rear side of the cart body (1); two positioning mechanisms (5) are arranged on the bottom of the turning frame (4); and a handrail (6) is fixedly connected to the rear side of the cart body (1); The positioning mechanism (5) comprises a limit block (501), a positioning block (502) and a connecting block (503); the bottom of the limit block (501) is fixedly connected to the top of the positioning block (502); the bottom of the positioning block (502) is in close contact with the surface of the second pulley (16); and the front side of the connecting block (503) is in contact with the rear side of the limit block (501).

2. The rear wheel flipping and positioning structure of the cart according to claim 1, characterized in that: A hinge (12) is provided at the bottom of the connecting block (503), and the connection between the limiting block (501) and the connecting block (503) is rotatably connected via the hinge (12).

3. The rear wheel flipping and positioning structure of the cart according to claim 1, characterized in that: The bottom of the limit block (501) is fixedly connected to an auxiliary frame (10), and the front side of the auxiliary frame (10) is in contact with the rear side of the second pulley (16).

4. The cart rear wheel flipping and positioning structure according to claim 1, characterized in that: The rear side of the second pulley (16) is fixedly connected to a positioning block (9), the bottom of the positioning block (9) is provided with an adjustment block (13), and the bottom of the adjustment block (13) is in close contact with the top of the limit block (501).

5. The cart rear wheel flipping and positioning structure according to claim 4, characterized in that: The bottom of the positioning block (9) is slidably connected to three moving columns (14), the bottom of the moving columns (14) is fixedly connected to the top of the adjustment block (13), and the surface of the moving columns (14) is provided with a spring (15).

6. The cart rear wheel flipping and positioning structure according to claim 1, characterized in that: The surface of the turning frame (4) is rotatably connected to two bearings (7), and opposite sides of the two bearings (7) respectively extend to two sides of the cart body (1) and are fixedly connected to the two sides of the cart body (1).

7. The cart rear wheel flipping and positioning structure according to claim 1, characterized in that: Both sides of the cart body (1) are fixedly connected to limit columns (8), and the surface of the limit columns (8) is in contact with the surface of the turning frame (4).

8. The cart rear wheel flipping and positioning structure according to claim 1, characterized in that: A connecting sleeve (11) is fixedly connected to the surface of the flip frame (4), and a magnetic attraction block (3) is fixedly connected to the rear side of the cart body (1).

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