Rotary hinging device and three-wheel trolley thereof

Abstract

The utility model discloses a rotary hinging device and a three-wheel trolley thereof, which belong to trolley components and comprise a hinging shaft core, a left movable connector and a right movable connector. A hinged shaft core is connected between the left movable connector and the right movable connector in a penetrating mode, and the left movable connector and the right movable connector can be opened in a left-right overturning mode relative to the hinged shaft core and can be mutually folded. According to the product, the left movable connector and the right movable connector are flexibly hinged and turned over through the hinged shaft core, the overall size is small, the left movable connector and the right movable connector are hinged and turned over left and right in a balanced mode, and the movable connection structure of the left movable connector, the right movable connector and the hinged shaft core is firm; the left movable connector and the right movable connector can be conveniently connected with the corresponding left cart foot stool and the corresponding right cart foot stool, and the left cart foot stool and the right cart foot stool can be conveniently opened and folded left and right; the left movable connector and the right movable connector are connected with the trundle frame and the cart trundle through the shared hinge shaft core.

Description

Technical Field

[0001] The utility model relates to a cart component, in particular to a rotary hinge device used for a cart and a three-wheeled cart thereof. Background Art

[0002] Chinese patent document publication number: CN220130170U discloses a foldable tricycle, including a body and a fixing mechanism. The vehicle body includes an active rod a1 and an active rod b2, a folding mechanism is arranged on the active rod a1, the active rod b2 is fixedly arranged on the folding mechanism, the active rod a1 is located on one side of the active rod b2, the folding mechanism is located between the active rod a1 and the active rod b2, a third connecting portion 3-1 is arranged at one end of the active rod a1, a first connecting portion 4-1 is arranged at the other end of the active rod a1, the first connecting portion 4-1 of the active rod a is connected to the folding mechanism, a fourth connecting portion 3-2 is arranged at one end of the active rod b2, a second connecting portion 4-2 is arranged at the other end of the active rod b2, the second connecting portion 4-2 of the active rod b2 is connected to the folding mechanism; a fixing mechanism is arranged between the active rod a1 and the active rod b2, the fixing structure is respectively connected to the first connecting portion 4-1 of the active rod a1 and the second connecting portion 4-2 of the active rod b2, when the active rod a1 moves in the opposite direction to the active rod b2 through the folding structure, the fixing mechanism is fixed after the active rod a1 and the active rod b2 are unfolded. The folding mechanism includes a fixed column 5, an extension block 6 and a rotating shaft structure 7; the fixed column 5 is fixedly connected to the second connecting portion 4-2 on the movable rod b2, and a front wheel 8 is rotatably mounted on the bottom of the fixed column 5; the extension block 6 is fixedly arranged on the fixed column 5, and the second connecting portion 4-2 of the movable rod b2 is centered about the vertical center of the fixed column 5; the rotating shaft structure 7 is arranged on the side of the extension block 6 away from the fixed column 5. The first connecting portion 4-1 of the movable rod a1 is rotatably mounted on the rotating shaft structure 7, so that the movable rod a1 can rotate with the fixed column as the center axis through the rotating shaft structure 7 when folding, and move toward the direction of the movable rod b2. When the movable rod a1 rotates to be in parallel contact with the movable rod b2, the movable rod a1 and the movable rod b2 complete folding.

[0003] The above-mentioned folding mechanism includes a fixed column 5, an extension block 6 and a rotating shaft structure 7, the fixed column 5 is connected to the extension block 6, and the extension block 6 is further connected to the rotating shaft structure 7; the above-mentioned hinged folding mechanism has a relatively large lateral width and a large volume; the fixed column 5 is connected to the movable rod b2, and the rotating shaft structure 7 is connected to the movable rod a1, with the fixed column 5 as the central axis, resulting in inconsistent centers of gravity of the fixed column 5 and the rotating shaft structure 7, and the center of gravity of the rotating shaft structure 7 is slightly deviated, the hinge point of the folding mechanism is not centered enough, and the movable rod a1 and the movable rod b2 are not so balanced when they are rotated left and right and hinged and folded, which is not flexible enough to use and does not look good. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a rotary hinge device with reasonable structural design, flexible hinge flipping, small size, balanced left and right hinges, and firm structure.

[0005] The solutions to the above technical problems are:

[0006] A rotary articulated device belongs to a cart component, including an articulated axis core, and also includes a left movable connector and a right movable connector; the articulated axis core is passed through the left movable connector and the right movable connector, and the left movable connector and the right movable connector can be flipped left and right to open and folded together relative to the articulated axis core.

[0007] The beneficial effects of a rotary articulated device and a three-wheeled trolley of the utility model are as follows: 1. The product enables the left movable joint head and the right movable joint head to be flexibly articulated and flipped through the articulated shaft core, and the overall volume is small. The left movable joint head and the right movable joint head can be articulated and flipped left and right in a balanced manner, and the movable connection structure of the left movable joint head, the right movable joint head and the articulated shaft core is firm; 2. The left movable joint head and the right movable joint head are conveniently connected to the corresponding left and right tripods of the trolley, and the left and right tripods of the trolley are conveniently opened and folded left and right; 3. The left movable joint head and the right movable joint head are connected to the caster frame and the trolley caster through a shared articulated shaft core. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a three-dimensional diagram of the left movable joint and the right movable joint of the utility model product in a flipped open state relative to the hinged axis core;

[0009] Figure 2 , Figure 3 It is a three-dimensional diagram of the left movable joint head and the right movable joint head of the utility model product in a state of being flipped, closed and folded relative to the hinge axis core;

[0010] Figure 4 This is a disassembled diagram of the left movable joint, the right movable joint, and the hinged shaft core of the utility model product;

[0011] Figure 5 This is a disassembled diagram of the left movable joint, the right movable joint, the hinged shaft core, the caster frame, and the cart casters of the utility model product;

[0012] Figure 6 This is a three-dimensional diagram of the hinged shaft core of the utility model product being installed on the caster frame, with the left movable joint and the right movable joint being flipped open;

[0013] Figure 7 , Figure 8 This is a three-dimensional diagram of the hinged shaft core of the utility model product being turned over and installed on the caster frame, with the left movable joint and the right movable joint turned over and closed;

[0014] Fig. 9 It is a three-dimensional diagram of the left movable joint, the right movable joint, the left tripod and the right tripod of the trolley in the disassembled state of the utility model product;

[0015] Fig.10 , Fig.11 , Fig.12 , Fig.13 A three-dimensional diagram of the three-wheeled trolley of the utility model in an unfolded state;

[0016] Fig.14 , Fig.15 It is a three-dimensional diagram of the three-wheeled trolley of the utility model in a folded state.

[0017] Articulated axis 1, left movable connector 2, left vertical axis through hole 201, left fixed connecting hole 202, left support ear notch 21, left support ear piece 22, right movable connector 3, right vertical axis through hole 301, right fixed connecting hole 302, right support ear piece 31, right support ear notch 32, trolley left foot frame 4, left trolley vertical rod 41, left handle 42, trolley right foot frame 5, right trolley vertical rod 51, right handle 52, caster frame 6, trolley caster 7, left rear caster 8, right rear caster 9, soft storage bag 10, frame support and articulated folding device 11. DETAILED DESCRIPTION

[0018] A rotary articulated device, belonging to a trolley component, is used on a medical device trolley, and includes an articulated shaft core 1; the articulated shaft core 1 is made of metal; the main technical improvements of this product are: it also includes a left movable connecting head 2 and a right movable connecting head 3; the left movable connecting head 2 and the right movable connecting head 3 are plastic injection molded and have a strong thickness; the articulated shaft core 1 is connected between the left movable connecting head 2 and the right movable connecting head 3, that is, the left movable connecting head 2, the right movable connecting head 3 and the articulated shaft core 1 are movably connected; the left movable connecting head 2 and the right movable connecting head 3 can both be flipped left and right relative to the articulated shaft core 1 to open And close and fold together; that is: the left movable connector 2 and the right movable connector 3 can be turned over, closed and folded together; this product makes the left movable connector 2 and the right movable connector 3 hinged and flipped flexibly through the hinged axis 1, and the overall volume is small, the left movable connector 2 and the right movable connector 3 are hinged and flipped left and right in a balanced manner, and the movable connection structure of the left movable connector 2, the right movable connector 3 and the hinged axis 1 is firm; the whole is convenient for the left and right tripods 4 and the right tripod 5 of the cart to open and close and fold left and right; the left movable connector 2 and the right movable connector 3 can be connected in an up and down stacked manner, and can also be connected to each other by plugging.

[0019] Preferably: a left vertical axis through hole 201 is provided on one side wall of the left movable connector 2; a right vertical axis through hole 301 is provided on one side wall of the right movable connector 3; the left vertical axis through hole 201 and the right vertical axis through hole 301 correspond vertically to each other, and the left vertical axis through hole 201 and the right vertical axis through hole 301 are commonly penetrated by an articulated axis 1; the diameters of the left vertical axis through hole 201 and the right vertical axis through hole 301 are just suitable for the diameter of the articulated axis 1; the movable connection structure of the left movable connector 2, the right movable connector 3 and the articulated axis 1 is further refined, and the structure is convenient to set up and assemble, and has a simple structure.

[0020] Preferably: a left support ear notch 21 is provided on one side wall of the left movable connector 2, a left support ear piece 22 is formed on the upper and / or lower wall of the left support ear notch 21, and a left vertical axis core through hole 201 is provided on the left support ear piece 22; a right support ear piece 31 is extended and protruded from one side wall of the right movable connector 3, a right support ear notch 32 is formed on the upper and / or lower wall of the right support ear piece, a right vertical axis core through hole 301 is provided on the right support ear piece 31, the right support ear piece 31 is embedded in the left support ear notch 21, and the left support ear piece is embedded in the right support ear notch 32; the left support ear piece 22 is a part of the left movable connector 2; the right support ear piece 31 is a part of the right movable connector 3; the left movable connector 2 is integrally injection molded; the right movable connector 3 is integrally injection molded; the structure of this connection is more delicate, forming mutual insertion, not easy to be loose, and relatively compact, the left movable connector 2 and the right movable connector 3 are more balanced and stable when flipped left and right, the overall connection is firm, and the volume is smaller.

[0021] Preferably: the left movable connector 2 is fixedly connected to the left tripod 4 of the cart; the right movable connector 3 is fixedly connected to the right tripod 5 of the cart; when used in conjunction with the tripod of the cart, the left tripod 4 and the right tripod 5 of the cart can be rotated left and right through the left movable connector 2 and the right movable connector 3 to open and fold together, thereby compressing the space and facilitating the opening and folding of the left tripod 4 and the right tripod 5 of the cart.

[0022] Preferably: the left movable connecting head 2 is provided with a left fixed connecting hole 202, and the bottom end of the left tripod 4 of the cart is inserted into the left fixed connecting hole 202 and fixed, thereby wrapping the bottom end joint of the left tripod 4 of the cart, making the appearance more concise, beautiful, and the connection more firmly; the right movable connecting head 3 is provided with a right fixed connecting hole 302, and the bottom end of the right tripod 5 of the cart is inserted into the right fixed connecting hole 302 and fixed, thereby wrapping the bottom end joint of the right tripod 5 of the cart, making the appearance more concise, beautiful, and the connection more firmly.

[0023] Preferably: the bottom end of the left foot frame 4 of the cart and the left movable connector 2 are jointly connected and fixed with a left locking nail, which further improves the connection firmness and is not easy to fall out; the bottom end of the right foot frame 5 of the cart and the right movable connector 3 are jointly connected and fixed with a right locking nail, which further improves the connection firmness and is not easy to fall out.

[0024] Preferably: the bottom section of the articulated shaft core 1 is fixedly connected with a caster frame 6, and a left movable connector 2 and a right movable connector 3 are arranged above the top of the caster frame 6; a trolley caster 7 is movably connected to the caster frame 6; the caster frame 6 is a caster fork, and the trolley caster 7 is installed in the caster fork; the caster frame 6 and the trolley caster 7 are installed and connected to the trolley body for easy pushing of the trolley. The articulated shaft core 1 is not only the shaft core of the left movable connector 2 and the right movable connector 3, but also the caster frame 6 is connected to the left movable connector 2 and the right movable connector 3 through the articulated shaft core 1, so as to share the articulated shaft core 1, so that the left movable connector 2 and the right movable connector 3 are arranged above the trolley caster 7, and the caster device assembly is formed together, which is convenient for assembly.

[0025] Preferably: the rear bottom of the left cart leg 4 is connected to a left rear caster 8; the rear bottom of the right cart leg 5 is connected to a right rear caster 9; the middle part of the left cart leg 4 is vertically fixedly connected to a left cart vertical rod 41, and the top of the left cart vertical rod 41 is connected to a left handle 42; the middle part of the right cart leg 5 is vertically fixedly connected to a right cart vertical rod 51, and the top of the right cart vertical rod 51 is connected to a right handle 52; the basic structure of the three-wheeled cart is formed, which is convenient for the elderly to push.

[0026] Preferably, a foldable soft storage bag 10 is connected between the left cart vertical rod 41 and the right cart vertical rod 51 by a strap or a screw assembly. The soft storage bag 10 is made of cloth. The soft storage bag 10 is convenient for the elderly to carry storage when going out, for example, to buy groceries, store kettles, etc.

[0027] A three-wheeled trolley comprises the above-mentioned rotary hinge device.

[0028] Specific structural embodiment:

[0029] A three-wheeled trolley comprises an articulated shaft core 1, a left movable joint 2, a right movable joint 3, a trolley left foot frame 4, a trolley right foot frame 5, a caster frame 6, a trolley caster 7, a left rear caster 8, a right rear caster 9, a left trolley vertical rod 41, a left handle 42, a right trolley vertical rod 51, a right handle 52, a soft storage bag 10, and a frame support and articulated folding device 11;

[0030] A left support ear notch 21 is provided on one side wall of the left movable joint 2, and a left support ear piece 22 is formed on the upper and lower walls of the left support ear notch 21, and a left vertical axis through hole 201 is provided on the left support ear piece 22; a right support ear piece 31 is extended and protruded from one side wall of the right movable joint 3, and a right vertical axis through hole 301 is provided on the right support ear piece 31, and the right support ear piece 31 is embedded in the left support ear notch 21; the left vertical axis through hole 201 and the right vertical axis through hole 301 correspond vertically, and the left vertical axis through hole 201 and the right vertical axis through hole 301 are connected with the hinge axis 1. The left movable joint 2 and the right movable joint 3 can both be turned over and opened left and right relative to the hinge axis 1 and folded together. The left movable joint 2 is provided with a left fixed connection hole 202, and the front bottom end of the left tripod 4 of the cart is inserted into the left fixed connection hole 202 for fixing; the right movable joint 3 is provided with a right fixed connection hole 302, and the front bottom end of the right tripod 5 of the cart is inserted into the right fixed connection hole 302 for fixing. The bottom end of the left tripod 4 of the cart and the left movable joint 2 are jointly fixed with a left locking nail; the bottom end of the right tripod 5 of the cart and the right movable joint 3 are jointly fixed with a right locking nail. The bottom section of the hinged shaft core 1 is fixedly connected with a caster frame 6, and the left movable joint 2 and the right movable joint 3 are arranged above the top of the caster frame 6; the caster 7 of the cart is movably connected to the caster frame 6. The rear bottom of the left cart tripod 4 is connected to a left rear caster 8; the rear bottom of the right cart tripod 5 is connected to a right rear caster 9; the middle of the left cart tripod 4 is vertically welded and fixedly connected to a left cart vertical rod 41, and the top of the left cart vertical rod 41 is connected to a left handle 42; the middle of the right cart tripod 5 is vertically welded and fixedly connected to a right cart vertical rod 51, and the top of the right cart vertical rod 51 is connected to a right handle 52. A foldable soft storage bag 10 is connected between the left cart vertical rod 41 and the right cart vertical rod 51.

[0031] The left cart foot frame 4, the left cart vertical rod 41, the left rear caster 8, and the left handle 42 form the left body frame of the cart;

[0032] The right foot frame 5, the right vertical rod 51, the right rear caster 9 and the right handle 52 form the right side frame of the cart;

[0033] A frame support and an articulated folding device 11 are movably connected between the left foot frame 4 and the right foot frame 5 of the cart. When the left body frame and the right body frame of the three-wheeled handcart are unfolded, the frame support and the articulated folding device 11 are unfolded synchronously to fix the distance between the left body frame and the right body frame of the cart, making it difficult to fold automatically, playing the role of unfolding support stability, and making it convenient for the elderly to push.

[0034] When the left side body frame and the right side body frame of the three-wheeled trolley are folded, the frame support and the articulated folding device 11 are folded synchronously to fix the folded state of the left side body frame and the right side body frame of the trolley, and are not easy to open automatically.

[0035] The left side body frame of the trolley and the right side body frame of the trolley are openable and foldable through the left movable joint 2 and the right movable joint 3.

[0036] The rear bottom of the left cart tripod 4 is connected to the left brake device of the left rear caster 8; the rear bottom of the right cart tripod 5 is connected to the right brake device of the right rear caster 9.

[0037] Further preferred technical solution: the left cart vertical rod 41 includes an upper tube and a lower tube, which are plugged into each other and can be adjusted to a suitable height according to the height of a person; the right cart vertical rod 51 includes an upper tube and a lower tube, which are plugged into each other and can be adjusted to a suitable height according to the height of a person.

[0038] Further preferred technical solution: the left foot frame 4 of the cart includes multiple sections, which are plugged together at the head and tail and can be compressed and packaged; the right foot frame 5 of the cart includes multiple sections, which are plugged together at the head and tail and can be compressed and packaged.

Claims

1. A rotary articulated device, belonging to a cart component, comprising an articulated shaft core, characterized in that: It also includes a left movable joint and a right movable joint; a hinged shaft core is connected between the left movable joint and the right movable joint, and the left movable joint and the right movable joint can be turned left and right relative to the hinged shaft core to open and fold together; The left movable joint is fixedly connected to the left foot frame of the cart; the right movable joint is fixedly connected to the right foot frame of the cart.

2. A rotary hinge device according to claim 1, characterized in that: A left vertical axis through hole is formed on one side wall of the left movable joint; a right vertical axis through hole is formed on one side wall of the right movable joint; the left vertical axis through hole and the right vertical axis through hole correspond vertically to each other, and a hinged axis is passed through the left vertical axis through hole and the right vertical axis through hole.

3. A rotary hinge device according to claim 2, characterized in that: A left support ear notch is formed on one side wall of the left movable joint, and a left support ear piece is formed on the wall above and / or below the left support ear notch, and a left vertical axis core through hole is formed on the left support ear piece; a right support ear piece is extended and protruded from one side wall of the right movable joint, and a right support ear notch is formed on the wall above and / or below the right support ear piece, and a right vertical axis core through hole is formed on the right support ear piece, and the right support ear piece is embedded in the left support ear notch, and the left support ear piece is embedded in the right support ear notch.

4. A rotary hinge device according to any one of claims 1 to 3, characterized in that: The left movable connecting head is provided with a left fixed connecting hole, and the front bottom end of the left tripod of the cart is inserted into the left fixed connecting hole for fixation; the right movable connecting head is provided with a right fixed connecting hole, and the front bottom end of the right tripod of the cart is inserted into the right fixed connecting hole for fixation.

5. A rotary hinge device according to claim 4, characterized in that: The bottom end of the left foot frame of the cart and the left movable connector are jointly connected and fixed with a left locking nail; the bottom end of the right foot frame of the cart and the right movable connector are jointly connected and fixed with a right locking nail.

6. A rotary hinge device according to claim 1, 2 or 3, characterized in that: The bottom section of the hinged shaft core is fixedly connected with a caster frame, and a left movable connecting head and a right movable connecting head are arranged above the top of the caster frame; and a cart caster is movably connected to the caster frame.

7. A rotary hinge device according to claim 1, characterized in that: The rear bottom of the left cart tripod is connected to a left rear caster; the rear bottom of the right cart tripod is connected to a right rear caster; the middle part of the left cart tripod is vertically fixedly connected to a left cart vertical rod, and the top of the left cart vertical rod is connected to a left handle; the middle part of the right cart tripod is vertically fixedly connected to a right cart vertical rod, and the top of the right cart vertical rod is connected to a right handle.

8. A rotary hinge device according to claim 7, characterized in that: A foldable soft storage bag is connected between the left cart vertical rod and the right cart vertical rod.

9. A three-wheeled trolley, characterized in that: The invention comprises a rotary hinge device as claimed in any one of claims 1 to 8.

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