TWM508484U - Four-wheel folding flatbed cart - Google Patents

Description

Folding four-wheel flatbed cart

The creation is a folding four-wheel flatbed cart, which is a cart capable of loading and transporting goods, and can be used to accommodate and fold the handle assembly and the wheel on the platform of the cart after use, thereby facilitating storage and saving. Space device.

Generally, when carrying goods on the market, the cart is often used to reduce the labor and time required for manual handling, and the conventional cart will carry and stack the goods on a carrier board with a roller at the bottom, and is connected by a connection. The handle on the carrying board is convenient for the user to push and pull the carrying board, and the bottom wheel is used to achieve the effect of easily carrying the item.

Therefore, in order to save time and effort, people often use various carts to carry various types of goods when transporting various types of goods. The cart is mainly provided with tires at the bottom end of the vehicle body and is provided on the vehicle body. There is a handle for the user to pull or push. Since the cart can carry a lot of goods at one time, there is no need to carry the goods slowly by the hands of the people one by one, and by moving the tires of the cart, it is more than manpower to carry the goods. It is labor-saving, time-saving and convenient, making the cart widely used by people.

However, although the above-mentioned cart can achieve the expected function of carrying the movement of the carried articles, it is also found in its practical operation and use that the cart has only a single functional design for moving the moving articles, but it is also found in its overall implementation. The cart is not able to be stored like a stroller, so that the cart takes up too much space, resulting in its overall There is still room for improvement in structural design.

In view of the above situation, the creator invested a lot of time to study relevant knowledge, and compared various advantages and disadvantages, research and development of related products, and many experiments and tests, and finally launched a "folding four-wheel flat panel" The cart" improves the above-mentioned lacks to meet the needs of the public.

The creation is a folding four-wheel flatbed cart, which is a cart capable of loading and transporting goods, and can be used to accommodate and fold the handle assembly and the wheel on the platform of the cart after use, thereby facilitating storage and saving. Space device.

In order to achieve the above objects and effects, the present invention provides a folding four-wheeled flat cart comprising a platform, a two-wheel connecting rod, a handle assembly and two pivoting groups: the two-wheel connecting rod is rotatably assembled a bottom of the platform, and a plurality of wheels are arranged on each of the connecting rods; the handle assembly is coupled to the two pivoting links to the two-wheel connecting rod; the handle assembly includes two frames, two handle arms, and a handle And a connecting frame; the two pivoting group spacing groups are disposed on the platform, each pivoting group includes a first gear member and a second gear member, the first gear member is assembled to the frame of the handle assembly, and the second gear member Formed on the wheel connecting rod, and the first gear member is meshed with the second gear member; wherein, when the handle assembly is in a horizontal position relative to the platform, the wheel system is folded horizontally relative to the bottom of the platform, when the handle assembly is pivoted from the During the horizontal position turning to the vertical position, the first gear member meshes with the second gear member, and the wheel connecting rod rotates synchronously in the axial direction so that the wheel is turned from the horizontal state to the vertical state below the platform.

According to a further technical feature of the present invention, the pivoting group further includes two pivot brackets and two pivots. The two pivot brackets are fixed to one end of the two frames, and the other ends of the two pivot brackets are pivotally connected to the two-wheel connection. Rod.

According to a further technical feature of the present invention, each of the connecting rods includes an outer tube and an inner tube, and an outer tube is provided with an arc-shaped groove near one end of the pivot bracket, and each inner tube is provided with a penetrating through hole, each inner tube group Provided in one end of each outer tube, and the pivot hole of each inner tube corresponds to the arcuate groove of the outer tube, and each pivot shaft penetrates the pivot hole of each first gear member and each inner tube and the outer tube An arcuate groove, and each pivot is disposed in each pivot bracket.

According to a further technical feature of the present invention, the handle assembly further includes two guiding rods and two driving tubes, each guiding rod is respectively disposed on each frame, and each pivot bracket is disposed at a lower end of each guiding rod, and each driving tube is disposed on the guiding rod circumference side.

Further technical features of the present invention further include two self-locking mechanisms, and each of the lock mechanisms includes a limit bolt and a locking bracket, and each of the limit bolts extends transversely through the inner tubes, and each of the lock brackets has a through-and-left The inclined grooves on both sides, and the respective locking mechanisms are disposed on the pivot bracket and the locking bracket below each frame. When the handle arm of the handle assembly is folded, the locking bracket is engaged with the limit bolt, and the handle arm is received When the combined position is moved to the deployed position, the drive tube drives the locking bracket out of the limit bolt to pivot the handle assembly between the vertical position and the horizontal position.

According to a further technical feature of the present invention, each of the driving tubes is provided with a plurality of studs, and the upper ends of the locking brackets are provided with a plurality of ports, and the studs are disposed on the inclined slots of the locking bracket, and two of the limiting bolts The ends are disposed in the slit, and the vertical movement of each of the drive tubes causes the respective locking brackets to move horizontally.

According to a further technical feature of the present invention, each of the pivot brackets is provided with two mounting plates, and each of the mounting plates and the pivot brackets are disposed under the frame via bolts, and each of the mounting plates has a corresponding limiting slot, and each limit is limited. The bit bolts are threaded through the limit slots.

According to a further technical feature of the present invention, a spring is disposed on a peripheral side of the drive tube of each lock mechanism, and when each spring is released from each handle arm, each drive tube is pulled back to each The initial position of the spring allows the limit bolts to be combined with the locking bracket.

Further technical features of the present invention further include at least two bolts for connecting to the handle assembly, and one end of each of the drive tubes is provided with a protrusion protruding from the upper side, and the other end of each of the drive tubes is provided with a pair of opposite axial elongated slots. And each spring sleeve is disposed between each of the driving tubes, and each bolt is disposed through the elongated slot.

According to a further technical feature of the present invention, the two handle arms are movably received relative to the frame and the connecting frame, and the opposing frame and the connecting frame extend away from the displacement.

Further technical features of the present invention further include a locking assembly disposed on the connecting frame and controlling the handle arm to be displaced relative to the connecting frame and to the locked fixed position.

In a further technical feature of the present invention, the top of the platform is provided with a recess for receiving the frame, the handle arm and the locking assembly.

According to a further technical feature of the present invention, the locking assembly has a brake.

Therefore, this creation can be said to be a kind of practical and progressive creation, which is worthy of promotion by the industry and publicized to the public.

100‧‧‧Folding four-wheel flatbed cart

1‧‧‧ platform

10‧‧‧ Groove

12‧‧‧Connecting parts

2‧‧‧ wheel connecting rod

21‧‧‧External management

22‧‧‧Inside

210‧‧‧ arc slot

220‧‧‧Pivot hole

3‧‧‧ Wheels

30‧‧‧ wheel bracket

4‧‧‧Handle assembly

40‧‧‧Hand group

41‧‧‧Frame

42‧‧‧Handle arm

43‧‧‧Handle

44‧‧‧Connecting frame

45‧‧‧ Guide rod

5‧‧‧Locking components

50‧‧‧ brake

6‧‧‧First gear parts

7‧‧‧Second gear parts

8‧‧‧ pivot bracket

80‧‧‧Installation board

81‧‧‧ pivot

82‧‧‧Perforation

83‧‧‧ Limit slot

84‧‧‧ bolt

85‧‧‧Plastic bushing

9‧‧‧Self-locking mechanism

91‧‧‧Limit bolts

92‧‧‧Lock bracket

920‧‧‧ incision

921‧‧‧ inclined slot

93‧‧‧ drive tube

931‧‧‧Bumps

932‧‧‧ elongated slot

94‧‧‧ Spring

A‧‧‧ pivot group

The first picture is a schematic diagram of the three-dimensional expansion of the creation.

The second picture is a schematic diagram of the three-dimensional folding of the creation.

The third picture is a schematic diagram of the combination of the creation part.

The fourth figure is a partial exploded view of the creation.

The fifth figure is a partial enlarged view of the fourth part of the figure.

The sixth figure is a schematic cross-sectional view of the pivoting of the present creation.

The seventh picture is a schematic diagram of the folding of the creation handle set.

The eighth figure is a schematic diagram of the folding of the creation handle assembly to the platform.

The ninth figure is a schematic diagram of the pivoting of the present handle assembly and the wheel.

The tenth figure is a schematic diagram of the folding of the handle assembly and the wheel.

In order to clarify the purpose and effect of the above-mentioned creations, the features and effects of the present invention will be described in detail with reference to the drawings. Referring to the first to fourth figures of the drawings, there is shown a folding four-wheel flatbed cart 100 comprising a platform 1, a two-wheel connecting rod 2, a handle assembly 4 and two pivoting groups A, The platform 1 is for placing goods, the two-wheel connecting rod 2 is rotatably assembled at the bottom of the platform 1, and each wheel connecting rod 2 is arranged with a plurality of wheels 3; the handle assembly 4 is The two pivoting group A is connected to the two-wheel connecting rod 2; the handle assembly 4 includes two frames 41, two handle arms 42, a handle 43 and a connecting frame 44; the two pivoting groups A are arranged on the platform. 1. Each pivoting group A includes a first gear member 6 and a second gear member 7. The first gear member 6 is assembled to the frame 41 of the handle assembly 4, and the second gear member 7 is assembled to the wheel connecting rod 2. And the first gear member 6 is meshed with the second gear member 7; by the above structure, when the creation is in the folded state, the handle assembly 4 is folded horizontally with the platform 1, and each wheel 3 is collapsible The horizontal position of the platform 1 is folded under the horizontal position (as shown in the second figure), which reduces the volume and saves space when the creation is in the collapsed state. The effect, and when the creation is to be deployed, the first gear member 6 and the second gear member 7 are meshed with each other during the process of the handle assembly 4 being turned from the horizontal position to the vertical position, so that the wheel connecting rod 2 is synchronized in the axial direction. Rotating, and each wheel 3 will be turned from the horizontal state of the original folding to the vertical state below the platform 1 (as shown in the first figure), so that the goods can be placed on the platform 1 when the creation is in the unfolded state. According to this, the purpose and effect of the creation are achieved, and it becomes a practical and excellent creation.

Referring to the third figure, the pivoting group A further includes two pivot brackets 8 and two pivot shafts 81. The two pivot brackets 8 are fixed to one end of the two frames 41, and the other two pivot brackets 8 are One end is pivoted to the two-wheel connecting rod 2.

Referring to the fourth and fifth figures, each of the connecting rods 2 includes an outer tube 21 and an inner tube 22. Each of the outer tubes 21 is provided with an arcuate groove 210 near one end of the pivot bracket 8, and each inner tube 22 A through hole 220 is disposed, and each inner tube 22 is disposed in one end of each outer tube 21, and the pivot hole 220 of each inner tube 22 corresponds to the arcuate groove 210 of the outer tube 21, and each pivot 81 Each of the first gear member 6, the plastic bushing 85 and the pivot hole 220 of each inner tube 22 and the arcuate groove 210 of each outer tube 21 are disposed, and each pivot shaft 81 is disposed in each pivot bracket 8. Further comprising a plurality of wheel brackets 30 and a plurality of connecting members 12, wherein each wheel bracket 30 and each connecting member 12 are disposed at one end of each inner tube 22 and each outer tube 21, and each wheel 3 is assembled to each wheel bracket 30.

As shown in the fourth figure, the handle assembly 4 further includes two guiding rods 45 and two driving tubes 93. The guiding rods 45 are respectively disposed on the respective frames 41, and the pivot brackets 8 are disposed at the lower ends of the guiding rods 45, and Each of the drive tubes 93 is provided on the circumferential side of the guide rod 45. The handle assembly further includes a handle set 40 that includes the aforementioned handle arm 42 and handle 43.

Referring to FIG. 4 to FIG. 6 , further comprising two self-locking mechanisms 9 , and each of the locking mechanisms 9 includes a limiting bolt 91 and a locking bracket 92 , and each limiting bolt 91 passes through each of the limiting bolts 91 . The tube 22, and each of the locking brackets 92 is provided with an inclined groove 921 extending through the left and right sides, and the respective locking mechanism 9 is disposed on the pivot bracket 8 and the locking bracket 92 below each frame 41, when the handle arm 42 of the handle assembly 4 When the locking bracket 92 is engaged with the limiting bolt 91, and the handle arm 42 is moved to the deployed position in the folded position, the driving tube 93 drives the locking bracket 92 to disengage the limiting bolt 91, so that the handle Component 4 in vertical position and level Pivot between positions.

By the above, when the handle arm 42 of the handle assembly 4 is folded, the handle arm 42 is folded downward to drive the guide rod 45 in the driving frame 41 to drive the drive tube 93 disposed on the circumferential side, and the drive tube 93 pushes the lock bracket 92. Disengaged from the limit bolt 91, the handle assembly 4 can be pivoted between a vertical position and a horizontal position.

As shown in the fifth figure, each of the driving tubes 93 is provided with a plurality of studs 930, and the upper ends of the locking brackets 92 are provided with a plurality of ports 920, and the studs 930 are disposed on the inclined slots 921 of the locking bracket 92. The two ends of each of the limiting bolts 91 are disposed on the slit 920, and the vertical movement of each of the driving tubes 93 causes the locking brackets 92 to move horizontally (as shown in FIGS. 7 and 8).

Referring to the third and fourth figures, each of the pivot brackets 8 is provided with two mounting plates 80, and each of the mounting brackets 80 and the pivot brackets 8 are assembled under the frame 41 via bolts 84, and each of the mounting plates 80 A corresponding limiting slot 83 is defined, and each limiting bolt 91 is disposed in each limiting slot 83.

Referring to the fourth figure, a spring 94 is disposed on the circumferential side of the drive tube 93 of each lock mechanism 9, and when the springs 94 are released from the respective handle arms 42, the drive tubes 93 are pulled back to the initial positions of the springs 94. The limit bolts 91 are combined with the lock bracket 92 (as shown in the seventh figure).

Referring to the fourth figure, at least two bolts 84 are further included for connecting the handle assembly 4, and one end of each of the driving tubes 93 is provided with an upper protruding protrusion 931, and each driving tube 93 is provided with a pair of opposite ends. The axially elongated slots 932, and the springs 94 are sleeved between the drive tubes 93, and the bolts 84 are disposed through the elongated slots 932.

Referring to the fourth figure, the two handle arms 42 are opposite to the frame 41 and the connecting frame. 44 is stored close to the displacement, and the opposing frame 41 and the connecting frame 44 extend away from the displacement.

Referring to the third figure, a locking assembly 5 is further disposed on the connecting frame 44 and the control handle arm 42 is displaceable relative to the connecting bracket 44 and the locking fixed position.

By the above, when the handle assembly 4 is actuated by the brake 50 of the locking assembly 5, each frame 41 presses down the projection 931 located on the drive tube 93 to push the peripheral side spring 94 of the drive tube 93 so that the lock bracket 92 is tilted. The studs 930 in the slots 921 slide downward, and the locking brackets 92 are horizontally moved, and the limit bolts 91 are disengaged from the slits 920 to slide downward in the limiting slots 83, so that the handle assembly 4 can be folded downward (eg, The ninth and tenth figures are shown).

Referring to the first figure, the top of the platform 1 is provided with a recess 10 for accommodating the frame 41, the handle arm 42 and the locking assembly 5. When the handle assembly 4 is folded down, the recess 10 is available for the frame 41, The handle arm 42 and the locking assembly 5 are housed (as shown in the second figure).

The above description is only a preferred embodiment for explaining the present creation, and is not intended to impose any form limitation on the creation, so that any modification related to the creation in the same creative spirit is made. Or the changer, other types that can be implemented according to the same effect, should still be included in the scope of protection of this creative intention.

In summary, the creation of the “Folding Four-Wheel Flatbed Cart” is indeed in line with the development of the industry in terms of practicality and cost-effectiveness, and the disclosed structural creation is also an unprecedented innovative structure. Therefore, its "newness" should be undoubtedly considered, and this creation can be more effective than the conventional structure. Therefore, it is also "progressive". It fully complies with the requirements of the application requirements for new patents in the Chinese Patent Law. File a patent application and ask the bureau to review it early and give it affirmation.

100‧‧‧Folding four-wheel flatbed cart

1‧‧‧ platform

10‧‧‧ Groove

3‧‧‧ Wheels

4‧‧‧Handle assembly

40‧‧‧Hand group

41‧‧‧Frame

42‧‧‧Handle arm

43‧‧‧Handle

44‧‧‧Connecting frame

50‧‧‧ brake

Claims (13)

A folding four-wheel flatbed cart includes a platform, a two-wheel connecting rod, a handle assembly and two pivoting groups: the two-wheel connecting rods are rotatably assembled at the bottom of the platform, and each wheel connecting rod is spaced a plurality of wheels are disposed; the handle assembly is coupled to the two pivoting groups to the two-wheel connecting rod; the handle assembly includes a second frame, two handle arms, a handle and a connecting frame; the two pivoting group spacing groups Provided on the platform, each pivoting group includes a first gear member and a second gear member, the first gear member is assembled to the frame of the handle assembly, the second gear member is assembled to the wheel connecting rod, and the first gear member is Engaging with the second gear member; wherein, when the handle assembly is in a horizontal position relative to the platform, the wheel system is folded horizontally relative to the lower portion of the platform, and the first gear member is in contact with the pivot assembly from the horizontal position to the vertical position The second gear member meshes and rotates, and the wheel link rod rotates synchronously in the axial direction so that the wheel is turned from the horizontal state to the vertical state below the platform. The folding four-wheel flatbed cart of claim 1, wherein the pivoting group further comprises two pivot brackets and two pivots, wherein the two pivot brackets are fixed to one end of the two frames, and the The other end of the two pivot brackets is pivotally mounted to the two-wheel connecting rod. The folding four-wheel flatbed cart of claim 1, wherein each of the connecting rods comprises an outer tube and an inner tube, wherein each outer tube is provided with an arcuate groove near one end of the pivot bracket, and each of the outer tubes The inner tube is provided with a penetrating pivot hole, each inner tube group is disposed in one end of each outer tube, and the pivot hole of each inner tube corresponds to the arcuate groove of the outer tube, and each pivot shaft passes through each of the first gears And a pivot hole of each inner tube and an arc groove of each outer tube, and each pivot is disposed in each pivot bracket. The folding four-wheel flatbed cart according to claim 3, wherein the The handle assembly further includes two guiding rods and two driving tubes, each guiding rod is disposed on each frame, and each pivot bracket is disposed at a lower end of each guiding rod, and each driving tube is disposed on a circumferential side of the guiding rod. The folding four-wheel flatbed cart according to claim 4, further comprising two self-locking mechanisms, and each of the locking mechanisms includes a limiting bolt and a locking bracket, and each of the limiting bolts crosses through Each inner tube and each locking bracket are provided with an inclined groove extending through the left and right sides, and the respective locking mechanism is disposed on the pivot bracket and the locking bracket below each frame, and when the handle arm of the handle assembly is folded, the locking bracket card is locked. When the handle arm is engaged with the limit bolt and the handle arm is moved to the deployed position in the collapsed position, the drive tube drives the lock bracket out of the limit bolt to pivot the handle assembly between the vertical position and the horizontal position. The folding four-wheel flatbed cart according to claim 5, wherein each of the driving tubes is provided with a plurality of studs, and the upper ends of the locking brackets are provided with a plurality of ports, and the studs are disposed on the locking The inclined groove of the bracket, and the two ends of each limit bolt are disposed at the slit, and the vertical movement of each drive tube causes the lock brackets to move horizontally. The folding four-wheel flat cart according to claim 2, wherein each pivot bracket is provided with two mounting plates, and each mounting plate and each pivot bracket are arranged under the frame via bolts, and each installation The plate has a corresponding limiting slot, and each limiting bolt is disposed in each limiting slot. The folding four-wheel flatbed cart of claim 5, wherein a spring is disposed on a peripheral side of the drive tube of each lock mechanism, and each spring is pulled back when each spring is released from each handle arm. The initial position of each spring combines the limit bolts with the locking bracket. The folding four-wheel flatbed cart of claim 8, further comprising at least two bolts for connecting to the handle assembly, wherein one end of each of the driving tubes is provided The upper side of the protruding block has a pair of opposite axially elongated slots, and the springs are sleeved between the driving tubes, and the bolts are disposed in the elongated slots. The folding four-wheel flatbed cart according to claim 1, wherein the two handle arms are movably received relative to the frame and the connecting frame, and the opposite frame and the connecting frame extend away from the displacement. The folding four-wheel flatbed cart of claim 10, further comprising a locking assembly disposed on the connecting frame and controlling the handle arm to be displaced relative to the connecting frame and the locking fixed position. The folding four-wheel flatbed cart of claim 11, wherein the top of the platform is provided with a recess for receiving the frame, the handle arm and the locking assembly. The folding four-wheel flatbed cart of claim 11, wherein the locking assembly has a brake.