CN201849511U - Collapsible Trolley Skeleton - Google Patents

Abstract

The utility model relates to the technical field of handcarts, in particular to a foldable handcart frame, which comprises a handle frame, a front foot frame and a rear foot frame. The handle frame comprises two handle pipes and a handle device. An upper joint is arranged at the bottom of the handle pipe, and a lower joint is arranged at the top of the front foot frame. A locking device is connected between the upper joint and the lower joint. After the handcart is unfolded, the locking device can be used to lock the upper joint and the lower joint, so that the handcart frame is locked in the unfolded state, which is safe and reliable. The handle frame and the rear foot frame can be folded onto the front foot frame, and the unfolding and folding are convenient. The rear foot frame comprises two rear foot pipes and a folding mechanism. The two rear foot pipes are connected by the folding mechanism. The two rear foot pipes can be folded toward the middle by the folding mechanism, so that the handcart frame can also be folded toward the middle from both sides after the handcart is folded. The handcart has a small volume after folding, occupies a small space, and is convenient for storage and transportation.

Description

Collapsible Trolley Skeleton

Technical field:

The utility model relates to the technical field of trolleys, in particular to a foldable trolley frame.

Background technique:

The stroller can have a seat, a carrier or a car chair on the frame, and is mainly used for riding or storing items for young children. Existing trolley frame comprises front vehicle frame, rear vehicle frame and handle frame, and front wheel group is installed at the bottom of front vehicle frame, and rear wheel group is installed at the bottom of rear vehicle frame, and rear vehicle frame and handlebar are connected with front vehicle frame respectively. Hinged to fold the handlebars and front frame towards the rear frame. However, the framework of this foldable trolley has no corresponding locking structure after unfolding and folding, and it is easy to leave the unfolded state and the folded state, which has low safety and is inconvenient to unfold and fold. After being folded, it has a large volume, takes up a lot of space, and is inconvenient for storage and transportation.

Utility model content:

The purpose of the utility model is to provide a safe and reliable retractable trolley frame that can be locked by a locking device after unfolding in view of the shortcomings of the prior art.

In order to achieve the above object, the technical solution adopted by the utility model is: a retractable trolley frame, which includes a handle frame, a front leg frame, a rear leg frame, the bottom of the handle frame, and the top of the rear leg frame are respectively hinged with the front leg frame, and the handle The handle frame includes two handle tubes and a foldable handle device. The bottom of the handle tube is provided with an upper joint, and the top of the front leg is provided with a lower joint corresponding to the upper joint. The upper joint and the lower joint are hinged. A locking device that can lock the upper joint and the lower joint is connected between the joint and the lower joint. The handle device includes two handle seats that are respectively arranged on the top of the two handle pipes, and two handle seats that are respectively arranged on the two handle pipes. The handle on the handle base, the two foldable covers, the handle slider, and the handle pin, one end of the two foldable covers are hinged to each other, the other ends of the two foldable covers are respectively hinged to the two handle bases, and the handle slides The sliding block is set in the handle seat, one end of the handle pin is connected with the folding cover, and the other end is engaged with the handle slider, and the handle slider is connected with a pull hook, which passes through the pull hook. The rope is connected with the locking device.

The locking device includes a joint slider and a joint gear. The combination of the upper joint and the lower joint forms an accommodation space. The joint slider and the joint gear are sequentially arranged in the accommodation space. The inner side of the upper joint is provided with a slope groove, and the joint The slider is provided with an inclined surface corresponding to the inclined surface groove, and the inner side of the joint end of the upper joint and the lower joint is respectively provided with a corresponding gear groove, and the two sides of the teeth of the joint gear are slid and clamped in the gear grooves of the upper joint and the lower joint respectively. Among them, the joint slider is connected with the steel rope for receiving the car.

A handle button is arranged on the handle.

The pull hook of described car receiving stretches out handle seat outside.

The handle frame, the front foot frame and the rear foot frame are connected with a folding linkage mechanism, and the folding linkage mechanism includes three folding linkages, one end of the three folding linkages is hinged to each other, and the three folding linkages The other end is respectively hinged with the handle frame, the front foot frame and the rear foot frame.

The front leg frame includes two front leg tubes and pedals, the bottoms of the two front leg tubes are respectively hinged on the pedals, and the tops of the two front leg tubes are respectively provided with a lower joint.

The rear foot frame includes two rear leg tubes and a retracting mechanism, the tops of the two rear leg tubes are respectively hinged with the two front leg tubes, and the two rear leg tubes are connected by a retracting mechanism.

The folding mechanism includes a handle and a rear frame connecting rod arranged in parallel between the two rear leg tubes, and the rear frame connecting rod and the two rear leg tubes are respectively hinged through a plurality of folding connecting rods.

The beneficial effects of the utility model are: the foldable trolley frame provided by the utility model includes a handle frame, a front foot frame, and a rear foot frame, and the handle frame includes two handle pipes and a foldable handle device. The bottom of the handle tube is provided with an upper joint, and the top of the front leg is provided with a lower joint hinged with the upper joint, and a locking device is connected between the upper joint and the lower joint. The handle device includes a handle seat, a handle, a folding The cover, the handle slider, the handle pin, and the handle slider are connected with a retractable pull hook, which is connected to the locking device through the retractable steel rope. After the trolley is unfolded, the locking device can be used to lock the cart The joint and the lower joint are locked, so that the trolley frame is locked in the unfolded state, which is safe and reliable. When folding, fold the handle device and pull the retractable hook, and drive the retractable steel rope to release the locking device, so that The upper joint and the lower joint are disengaged, so that the handle frame and the rear foot frame can be folded onto the front foot frame, which is convenient to unfold and fold.

In addition, the rear leg frame includes two rear leg tubes and a retracting mechanism. The tops of the two rear leg tubes are respectively hinged with the two front leg tubes, and the two rear leg tubes are connected by a retracting mechanism. Folding, so that the frame of the trolley can be folded from both sides to the middle after being folded. The folded trolley is small in size, takes up little space, and is convenient for storage and transportation.

Description of drawings:

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the exploded schematic view of the utility model handle frame;

Fig. 3 is an exploded schematic view of the locking device of the present invention

Fig. 4 is a sectional view of the utility model handle device;

Fig. 5 is the sectional view of A-A direction in Fig. 4;

Fig. 6 is a structural schematic diagram during the folding process of the utility model;

Fig. 7 is a schematic diagram of the structure of the utility model folded from both sides to the middle.

Detailed ways:

Below in conjunction with accompanying drawing, the utility model is further described, see shown in Fig. 1～7, the utility model comprises handle frame 10, front foot frame 20, rear foot frame 30, the bottom of handle frame 10, the top of rear foot frame 30 Respectively hinged with the front leg frame 20, the handle frame 10 includes two handle tubes 1, a foldable handle device 2, the bottom of the handle tube 1 is provided with an upper joint 31, and the top of the front leg frame 20 is provided with an upper joint The lower joint 32 corresponding to the joint 31 , the upper joint 31 and the lower joint 32 are hinged, and the locking device 3 that can lock the upper joint 31 and the lower joint 32 is connected between the upper joint 31 and the lower joint 32 . After the trolley is unfolded, the locking device 3 can be used to lock the upper joint 31 and the lower joint 32, so that the framework of the trolley is locked in the unfolded state, which is safe and reliable, and convenient to unfold and fold.

The handle device 2 includes two handle seats 21 respectively arranged on the tops of the two handle pipes 1, two handles 22 respectively arranged on the two handle seats 21, two folding covers 23, a handle slide Block 24, handle pin 25, the handle 22 is provided with a handle button 28, one end of the two foldable covers 23 are hinged to each other, the other ends of the two folded covers 23 are respectively hinged with the two handle seats 21, and the handle slides Block 24 is slidably arranged in handle seat 21, and one end of handle pin 25 is connected with foldable cover 23, and its other end engages with handle slider 24, and handle slider 24 is connected with retractable car pull hook 26, and the The car pull hook 26 is connected with the locking device 3 through the car receiving steel rope 27, and the car receiving pull hook 26 stretches out of the handle seat 21.

The locking device 3 includes a joint slider 33 and a joint gear 34. The combination of the upper joint 31 and the lower joint 32 forms an accommodation space. The joint slider 33 and the joint gear 34 are sequentially arranged in the accommodation space. The upper joint 31, the joint The slider 33, the joint gear 34, and the lower joint 32 are riveted together by rivets, the joint slider 33 can rotate inside the upper joint 31 and slide axially, and the joint gear 34 can slide axially. The inner side of the upper joint 31 is provided with an inclined surface groove 311, and the joint slider 33 is provided with an inclined surface 331 corresponding to the inclined surface groove 311. The joint slider 33 can slide on the inclined surface groove 311 inside the upper joint 31 through the inclined surface 331, and the upper joint 31 and the inner side of the joint end of the lower joint 32 are respectively provided with corresponding gear slots 35, and the two sides of the teeth of the joint gear 34 are respectively slid and clamped in the gear slots 35 of the upper joint 31 and the lower joint 32, and the joint gear 34 can be on the upper joint 34. Sliding between the joint 31 and the lower joint 32, when the teeth of the joint gear 34 are stuck in the gear grooves 35 of the upper joint 31 and the lower joint 32 at the same time, the upper joint 31 and the lower joint 32 are locked by the joint gear 34 and cannot be relative Rotate, when the teeth of the joint gear 34 slide and get stuck in the gear groove 35 of the lower joint 32, the upper joint 31 and the lower joint 32 can rotate relative to each other without being locked by the joint gear 34, and the joint slider 33 and the car-receiving steel rope 27 connect.

The handle frame 10, the front foot frame 20 and the rear foot frame 30 are connected with a folding linkage mechanism 4, and the folding linkage mechanism 4 includes three folding connecting rods 41, one end of the three folding connecting rods 41 is hinged to each other, and the three folding connecting rods 41 The other end of the folding connecting rod 41 is respectively hinged with the handle frame 10, the front leg frame 20 and the rear leg frame 30. When the handle frame 10 is pushed, the handle frame 10 drives the front leg frame 20 and the rear leg frame through the folding linkage mechanism 4 30. Synchronous folding or unfolding.

The front leg frame 20 includes two front leg tubes 5 and pedals 6, the bottoms of the two front leg tubes 5 are respectively hinged on the pedals 6, and the tops of the two front leg tubes 5 are respectively provided with a lower joint 32.

The rear leg frame 30 includes two parallel rear leg tubes 7 and a draw mechanism 8, the tops of the two rear leg tubes 7 are respectively hinged with the two front leg tubes 5, and the two rear leg tubes 7 are connected by the draw mechanism 8. The folding mechanism 8 includes a handle 81, a rear frame connecting rod 82 arranged in parallel between the two rear leg tubes 7, the rear frame connecting rod 82 and the two rear leg tubes 7 are respectively hinged by a plurality of folding connecting rods 83, and the The folding mechanism 8 can fold the two rear leg tubes 7 to the middle, so that the cart frame can also be folded from both sides to the middle after the cart frame is folded.

The working principle of the utility model is:

1. Press down the handle button 28 and push the handle folding cover 23 forward. The folding cover 23 drives the handle pin 25 to slide upwards, so that the pin is disengaged from the engagement with the handle slider 24. At this time, the handle slider 24 Can slide up and down in the handle seat 21;

2. Pull the retractable hook, the retractable hook drives the handle slider 24 to slide upward together, and the handle slider 24 slides upward through the retractable steel rope 27 to drive the joint slider 33 to rotate in the upper joint 31, and the upper joint 31 Under the action of the inclined surface 331 guide groove, the joint gear 34 is pushed into the gear groove 35 of the lower joint 32, so that the engagement of the upper joint 31 and the lower joint 32 is disengaged. At this time, the upper joint 31, the lower joint 32 Can be rotated relative to each other;

3. Push the handle tube 1 forward, and the handle tube 1 will pull the rear tripod 30 to fold synchronously in the direction of the front tripod 20 through the folding linkage mechanism 4 composed of three folding connecting rods 41, so as to achieve continuous folding. The purpose of moving the vehicle;

4. Pull the handle 81 upwards, drive the rear frame connecting rod 82 and the retracting connecting rod 83 to fold, and drive the rear leg tube 7 to fold in the middle. At the same time, the rear leg tube 7 drives the front leg tube 5 and the handle tube 1 to move together, so that the whole The car is folded from both sides to the middle to achieve the purpose of smaller volume after the car is folded.

Of course, the above is only a preferred embodiment of the utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the utility model patent application are included in the utility model patent application within range.

Claims (8)

1. foldable trolley frame, it comprises handle frame (10), front foot frame (20), rear foot frame (30), the bottom of handle frame (10), the top of rear foot frame (30) and front foot frame respectively (20) Hinged, characterized in that: the handle frame (10) includes two handle tubes (1), a foldable handle device (2), and the bottom of the handle tube (1) is provided with an upper Joint (31), the top of front foot frame (20) is provided with the lower joint (32) corresponding with upper joint (31), upper joint (31) and lower joint (32) are hinged, upper joint (31) and lower joint ( 32) is connected with a locking device (3) that can lock the upper joint (31) and the lower joint (32), and the handle device (2) includes two handle tubes (1) Handle base (21) at the top, two handles (22) that are arranged on two handle bases (21) respectively, two folding covers (23), handle slider (24), handle pin ( 25), one end of the two folding covers (23) is hinged to each other, the other ends of the two folding covers (23) are respectively hinged to the two handle seats (21), and the handle slider (24) is slidably arranged on the handle seat (21), one end of the handle pin (25) is connected with the foldable cover (23), and its other end is engaged with the handle slide block (24), and the handle slide block (24) is connected with a car pull hook ( 26), the car draw hook (26) is connected with the locking device (3) by the car receiving steel rope (27). 2. The frame of the foldable trolley according to claim 1, characterized in that: the locking device (3) includes a joint slider (33), a joint gear (34), an upper joint (31) and a lower joint (32) are combined to form an accommodating space, and the joint slider (33) and the joint gear (34) are sequentially arranged in the accommodating space, and the inner side of the upper joint (31) is provided with a bevel groove (311), and the joint slider (33 ) is provided with an inclined surface (331) corresponding to the inclined surface groove (311), and the inner side of the joint end of the upper joint (31) and the lower joint (32) is respectively provided with a corresponding gear groove (35), and the teeth of the joint gear (34) The both sides of the sliding block are located in the gear groove (35) of the upper joint (31) and the lower joint (32) respectively, and the joint slide block (33) is connected with the steel rope (27) of the car. 3. The frame of the collapsible trolley according to claim 1, characterized in that: a handle button (28) is provided on the handle (22). 4. The frame of the retractable trolley according to claim 1, characterized in that: the retractable hook (26) protrudes outside the handle seat (21). 5. The frame of the foldable trolley according to claim 1, characterized in that: a folding linkage mechanism (4) is connected between the handle frame (10), the front leg frame (20) and the rear leg frame (30). ), the folding linkage mechanism (4) includes three folding connecting rods (41), one end of the three folding connecting rods (41) is hinged to each other, and the other ends of the three folding connecting rods (41) are respectively connected to the handle frame (10), front foot frame (20) and rear foot frame (30) are hinged. 6. The collapsible trolley frame according to any one of claims 1-5, characterized in that: the front leg frame (20) includes two front leg tubes (5), pedals (6), two The bottoms of the front leg tubes (5) are respectively hinged on the pedals (6), and the tops of the two front leg tubes (5) are respectively provided with a lower joint (32). 7. The frame of the foldable trolley according to claim 6, characterized in that: the rear leg frame (30) includes two rear leg tubes (7), a folding mechanism (8), and the two rear leg tubes (7) The top is respectively hinged with the two front leg tubes (5), and the two rear leg tubes (7) are connected by a folding mechanism (8). 8. The frame of the foldable trolley according to claim 7, characterized in that: the foldable mechanism (8) includes a handle (81), a rear frame connection arranged in parallel between the two rear leg tubes (7). Bar (82), the rear frame connecting rod (82) and the two rear foot pipes (7) are respectively hinged by many gathering connecting rods (83).

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