Wheel connecting device for trolley and trolley

Abstract

The utility model provides a wheel connecting device used on a trolley and the trolley, and aims to solve the problems that a connecting device between wheels and a trolley body on the trolley in the prior art is complex to disassemble and assemble and inconvenient to operate. A wheel connecting device used on a trolley comprises a trolley body connecting rod, a wheel connecting rod and a wheel connecting rod, an inserting groove is formed in the trolley body connecting rod, and an opening communicated with the inserting groove is formed in the outer side wall of the trolley body connecting rod; the wheel connecting rod is detachably inserted into the slot, and the upper part of the wheel connecting rod is provided with a first clamping part; the unlocking wrench is rotationally arranged at the opening through a pin shaft, a second clamping part clamped with the first clamping part is arranged at the upper end of the unlocking wrench, a pressing part is arranged at the lower end of the unlocking wrench, and an elastic piece enabling the second clamping part to be clamped with the first clamping part is arranged between the unlocking wrench and the vehicle body connecting rod; and the second clamping part can be separated from the first clamping part by pressing the pressing part. The utility model is more convenient and quicker to disassemble and assemble.

Description

Technical Field

[0001] The utility model belongs to the technical field of trolleys, and in particular relates to a wheel connecting device used on a trolley and the trolley. Background Art

[0002] At present, commonly used carts such as camping carts used for outdoor camping and baby carriages used in daily life have relatively complex connection structures between the wheels and the body. When removing or installing the wheels, some special tools such as wrenches, screwdrivers, calipers, etc. are often required. The installation and removal process is relatively cumbersome, and the problem of unstable wheel operation due to improper installation may easily occur during the removal and removal process. Therefore, the connection device between the wheel and the body of the cart in the prior art needs to be further improved. Utility Model Content

[0003] The utility model provides a wheel connecting device for a trolley and the trolley, aiming to solve the problem that the connecting device between the wheel and the body of the trolley in the prior art is relatively complicated during assembly and disassembly and inconvenient to operate.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] In a first aspect, the utility model provides a wheel connection device for a trolley, comprising:

[0006] A vehicle body connecting rod, wherein the vehicle body connecting rod is provided with a slot, an outer side wall of the vehicle body connecting rod is provided with an opening communicating with the slot, and the vehicle body connecting rod is provided with a vehicle body connecting portion;

[0007] A wheel connecting rod is detachably inserted into the slot, wherein the upper portion of the wheel connecting rod is provided with a first clamping portion, and the lower portion of the wheel connecting rod is provided with a wheel connecting portion; and,

[0008] An unlocking wrench is rotatably arranged at the opening of the vehicle body connecting rod through a pin shaft, the upper end of the unlocking wrench is provided with a second clamping portion that is mutually clamped with the first clamping portion, and the lower end of the unlocking wrench is provided with a pressing portion. An elastic member that enables the second clamping portion to be clamped with the first clamping portion is provided between the unlocking wrench and the vehicle body connecting rod, and the second clamping portion can be disengaged from the first clamping portion by pressing the pressing portion.

[0009] A further solution: the first clamping portion is a clamping slot, and the second clamping portion is a clamping block clamped in the clamping slot.

[0010] Based on the above technical solution: the connection structure between the card block and the card slot makes disassembly and assembly faster and more convenient.

[0011] A further solution: the slot is an annular slot, and the block is provided with an arcuate slot. When the block is located in the slot, the arcuate slot wraps around the outside of the wheel connecting rod in the annular slot.

[0012] Based on the above technical solution: the arc groove wraps the outer side of the wheel connecting rod in the annular groove, so that the clamping block is more tightly connected with the clamping groove, preventing the clamping block from escaping from the clamping groove, making the connection between the wheel connecting rod and the vehicle body connecting rod more stable.

[0013] A further solution: the elastic member is a spring, and the spring is arranged between the pressing portion and the vehicle body connecting rod.

[0014] A further solution is that a bump with a small upper end and a large lower end is provided at the upper end of the wheel connecting rod, and the annular groove is located at the lower side of the bump.

[0015] Based on the above technical solution: the convex block with a small upper end and a large lower end enables the convex block to push up the card block and compress the spring during the process of inserting the wheel connecting rod into the slot of the vehicle body connecting rod. During this process, the convex block gradually passes through the arc groove. Finally, after the convex block completely passes through the arc groove, the card block will be stuck in the annular card groove under the resetting action of the spring.

[0016] A further solution: an articulated seat is provided on the vehicle body connecting rod, and the middle part of the unlocking wrench is rotatably connected to the articulated seat via a pin shaft.

[0017] Based on the above technical solution: the unlocking wrench is arranged between the articulated seat and the vehicle body connecting rod, so that the unlocking wrench is more stable during the pressing and resetting process.

[0018] A further solution: the articulated seat is U-shaped and includes two elastic arms and a closing portion connecting the two elastic arms, and the unlocking wrench is located between the two elastic arms of the U-shaped articulated seat; two connecting holes are provided on the vehicle body connecting rod, and each of the elastic arms is arranged in the connecting hole corresponding thereto.

[0019] A further solution: The ends of the two elastic arms of the hinged seat are provided with hooks, the connecting hole is a through hole, and the body connecting rod is provided with a hanging portion on the back side of the through hole, and the hook of each elastic arm passes through the corresponding through hole from the front and then hooks on the hanging portion.

[0020] Based on the above technical solution: the hook passes through the through hole and hooks on the hanging part, thereby fixing the hinge seat on the vehicle body connecting rod. The above arrangement facilitates the installation of the hinge seat and the unlocking wrench on the vehicle body connecting rod, and is more convenient for disassembly and assembly, with lower cost.

[0021] A further solution: each elastic support arm of the hinged seat is provided with two upper and lower hooks, a hinge groove is provided between the two hooks, and pins are provided at both ends of the unlocking wrench and the two pins are rotatably arranged in the two hinge grooves respectively.

[0022] In a second aspect, the utility model provides a trolley, comprising a trolley body, a wheel assembly, and a wheel connecting device for a trolley as described in any scheme in the first aspect, wherein the wheel assembly is connected to the wheel connecting rod, and the trolley body is connected to the body connecting rod.

[0023] Based on the above technical solution: the cart can be a camping cart or a baby carriage used for outdoor camping, and adopts a wheel connection device that is easy to disassemble, so that it is more convenient to disassemble or install the wheels.

[0024] The beneficial effects of the utility model are:

[0025] The vehicle body connecting rod of the utility model is used for connecting with the vehicle body, and the wheel connecting rod is used for connecting with the wheel. By arranging a first clamping part on the upper end of the wheel connecting rod, an unlocking wrench is rotatably arranged at the opening of the vehicle body connecting rod, and a second clamping part is arranged on the unlocking wrench. When the wheel connecting rod is inserted into the slot, the second clamping part is clamped with the first clamping part under the action of the elastic member, so that the wheel connecting rod is clamped in the vehicle body connecting rod. When disassembling, the second clamping part is disengaged from the first clamping part by pressing the pressing part, and the wheel connecting rod can be pulled out from the slot of the vehicle body connecting rod. Installation and disassembly do not require the aid of other tools, which is very convenient and can achieve quick disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 The utility model is a structural schematic diagram of a wheel connecting device used for a camping vehicle.

[0028] Figure 2 The utility model is a schematic diagram of the exploded structure of a wheel connecting device used for a camping vehicle.

[0029] Figure 3 It is a structural schematic diagram of a hook passing through a through hole and hooked onto a vehicle body connecting rod.

[0030] Figure 4 It is a schematic diagram of the structure in which the wheel connecting rod is square.

[0031] Figure 5 It is a structural schematic diagram of the connection between the vehicle body connecting rod and the column of the vehicle body.

[0032] Description of the numbers in the figure:

[0033] 1-column; 2-body connecting rod; 21-connecting hole; 22-spring column; 23-slot; 24-opening; 25-limiting block; 3-wheel connecting rod; 31-wheel connecting part; 32-annular slot; 33-bump; 4-unlocking wrench; 41-block; 42-pressing part; 43-pin shaft; 5-hinge seat; 51-hook; 52-hinge slot; 6-spring. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the utility model.

[0035] Embodiment 1:

[0036] like Figures 1 to 5 As shown, this embodiment provides a wheel connection device for a trolley, comprising:

[0037] A vehicle body connecting rod 2, wherein a slot 23 is provided on the vehicle body connecting rod 2, an opening 24 communicating with the slot 23 is provided on the outer side wall of the vehicle body connecting rod 2, and a vehicle body connecting portion is provided on the vehicle body connecting rod 2, wherein the vehicle body connecting portion is used to connect the vehicle body, and specifically can be connected to a column 1 on the vehicle body;

[0038] The wheel connecting rod 3 is detachably inserted into the slot 23, the upper part of the wheel connecting rod 3 is provided with a first clamping part, and the lower part is provided with a wheel connecting part 31; and,

[0039] The unlocking wrench 4 is rotatably arranged at the opening 24 of the vehicle body connecting rod 2 through a pin shaft 43. The upper end of the unlocking wrench 4 is provided with a second clamping portion mutually clamped with the first clamping portion. The lower end of the unlocking wrench 4 is provided with a pressing portion 42. An elastic member is provided between the unlocking wrench 4 and the vehicle body connecting rod 2 to clamp the second clamping portion with the first clamping portion. The second clamping portion can be separated from the first clamping portion by pressing the pressing portion 42. After the second clamping portion is separated from the first clamping portion, the wheel connecting rod 3 can be pulled out from the slot 23. The upper end of the slot 23 can be an open-type through-hole, or can be set to a closed type, preferably a through hole through-hole. Specifically, the wheel connecting rod 3 can be inserted into the slot 23 from the opening 24 at the lower end of the slot 23.

[0040] In this embodiment, in order to facilitate disassembly and simplify the structure, the first clamping part is set as a clamping slot, and the second clamping part is a clamping block 41 clamped in the clamping slot. The first clamping part can also be set as a clamping block 41 and the second clamping part as a clamping slot.

[0041] Among them, Figure 2 As shown, when the wheel is set as a universal wheel, in order to facilitate the rotation of the wheel, the clamping groove is set as an annular clamping groove 32, and the clamping block 41 is provided with an arc groove. When the clamping block 41 is located in the clamping groove, the arc groove wraps around the outside of the wheel connecting rod 3 in the annular clamping groove 32. The provision of the annular clamping groove 32 and the arc groove facilitates the rotation of the wheel connecting rod 3. During the rotation, the arc groove always wraps around the outside of the wheel connecting rod 3 in the annular clamping groove 32, and at the same time makes the clamping more stable.

[0042] In this embodiment, the elastic member is preferably a spring 6, and the spring 6 is arranged between the pressing portion 42 and the vehicle body connecting rod 2. In a specific manner, spring columns 22 are arranged on the pressing portion 42 and the vehicle body connecting rod 2, and the two ends of the spring 6 are respectively sleeved on the two spring columns 22.

[0043] The elastic member may also be a torsion spring, which is specifically arranged at the pin 43 and located between the unlocking wrench 4 and the vehicle body connecting rod 2 .

[0044] In this embodiment, Figure 1 and Figure 2As shown, in order to facilitate the insertion of the wheel connecting rod 3 into the slot 23, a protrusion 33 with a small upper end and a large lower end is provided at the upper end of the wheel connecting rod 3 in this embodiment, and the annular groove 32 is located at the lower side of the protrusion 33. In the process of inserting the wheel connecting rod 3 into the slot 23 of the body connecting rod 2, the protrusion 33 with a small upper end and a large lower end can pass through the arc groove upward and lift the block 41, and the spring 6 is compressed. In this process, the protrusion 33 gradually passes through the arc groove. Finally, after the protrusion 33 completely passes through the arc groove and reaches the upper side of the block 41, under the reset action of the spring 6, the block 41 will be stuck in the annular groove 32, and the arc groove is wrapped around the outer side of the body connecting rod 2 in the annular groove 32. This solution does not need to press the unlocking wrench 4 during installation, which is more convenient.

[0045] In this embodiment, Figures 1 to 3 As shown, as a specific structure for the unlocking wrench 4 to be rotatably connected to the vehicle body connecting rod 2, the vehicle body connecting rod 2 is provided with an articulated seat 5, and the middle part of the unlocking wrench 4 is rotatably connected to the articulated seat 5 through a pin 43. Specifically, the articulated seat 5 is U-shaped and includes two elastic arms and a closed portion connecting the two elastic arms, and the unlocking wrench 4 is located between the two elastic arms of the U-shaped articulated seat 5; the vehicle body connecting rod 2 is provided with two connecting holes 21, and each of the elastic arms is arranged in the corresponding connecting hole 21. The ends of the two elastic arms of the articulated seat 5 are provided with hooks 51, and the connecting hole 21 is a through hole, and the vehicle body connecting rod 2 is provided with a hanging part on the back of the through hole, and the hook 51 of each elastic arm passes through the corresponding through hole from the front and then hooks on the hanging part, that is, the hook 51 penetrates into the through hole from the front. Specifically, the two elastic arms of the U-shaped hinge seat 5 have a certain elasticity. When installing the hinge seat 5, the two elastic arms are squeezed inward to enter the connecting hole 21, and then the two elastic arms are released, and the hooks 51 at the ends of the elastic arms are hooked on the hanging part.

[0046] Among them, each elastic support arm of the hinge seat 5 is provided with two upper and lower hooks 51, and a hinge groove 52 is provided between the two hooks 51. Both ends of the unlocking wrench 4 are provided with pins 43 and the two pins 43 are rotatably set in the two hinge grooves 52 respectively.

[0047] like Figure 2 and Figure 4 As shown, in this embodiment, the wheel connecting rod 3 can be set to be circular, square, polygonal, etc.

[0048] Embodiment 2:

[0049] like Figure 5As shown, this embodiment provides a trolley, including a body, a wheel assembly, and a wheel connection device for a trolley as described in any scheme of the first embodiment, wherein the wheel assembly is connected to the wheel connection rod 3, and the body is connected to the body connection rod 2. Specifically, the body connection rod 2 may be connected to a column 1 on the body, and the column 1 is sleeved on the outside of the body connection rod 2, and a limit block 25 is provided on the body connection rod 2, and a limit groove is provided on the column 1, and the limit groove is stuck on the outside of the limit block 25 to prevent the body connection rod 2 from rotating relative to the column 1. The trolley may be a camper or a baby carriage used for outdoor camping.

[0050] Working principle description:

[0051] During installation, the wheel connecting rod 3 is inserted into the slot 23 through the notch of the slot 23, and the protrusion 33 with a small upper end and a large lower end can pass through the arc groove upward and lift the block 41, and the spring 6 is compressed. During this process, the protrusion 33 gradually passes through the arc groove, and finally the protrusion 33 completely passes through the arc groove to reach the upper side of the block 41. Under the reset action of the spring 6, the block 41 will be stuck in the annular groove 32, and the arc groove wraps the outer side of the body connecting rod 2 in the annular groove 32, so that the wheel connecting rod 3 and the body connecting rod 2 are connected to each other. During disassembly, press the pressing part 42 to make the block 41 disengage from the groove, and then the wheel connecting rod 3 can be pulled out from the slot 23 to remove the wheel from the body.

[0052] The present utility model is not limited to the above optional implementation modes. Under the premise of not conflicting with each other, the various schemes can be combined arbitrarily. Anyone can derive other forms of products under the inspiration of the present utility model. However, no matter what changes are made in their shapes or structures, all technical schemes that fall within the scope defined by the claims of the present utility model fall within the protection scope of the present utility model.

Claims

1. A wheel connection device for a trolley, characterized in that: include: A vehicle body connecting rod, wherein the vehicle body connecting rod is provided with a slot, an outer side wall of the vehicle body connecting rod is provided with an opening connected to the slot, and the vehicle body connecting rod is provided with a vehicle body connecting portion; A wheel connecting rod is detachably inserted into the slot, wherein the upper portion of the wheel connecting rod is provided with a first clamping portion, and the lower portion of the wheel connecting rod is provided with a wheel connecting portion; and, An unlocking wrench is rotatably arranged at the opening of the vehicle body connecting rod through a pin shaft, the upper end of the unlocking wrench is provided with a second clamping portion that is mutually clamped with the first clamping portion, the lower end of the unlocking wrench is provided with a pressing portion, and an elastic member that enables the second clamping portion to be clamped with the first clamping portion is provided between the unlocking wrench and the vehicle body connecting rod, and the second clamping portion can be disengaged from the first clamping portion by pressing the pressing portion.

2. A wheel connection device for a trolley according to claim 1, characterized in that: The first clamping portion is a clamping slot, and the second clamping portion is a clamping block clamped in the clamping slot.

3. A wheel connection device for a trolley according to claim 2, characterized in that: The clamping groove is an annular clamping groove, and the clamping block is provided with an arc groove. When the clamping block is located in the clamping groove, the arc groove wraps around the outer side of the wheel connecting rod in the annular clamping groove.

4. A wheel connection device for a trolley according to claim 1, 2 or 3, characterized in that: The elastic member is a spring, and the spring is arranged between the pressing portion and the vehicle body connecting rod.

5. A wheel connection device for a trolley according to claim 3, characterized in that: The upper end of the wheel connecting rod is provided with a convex block which is small at the upper end and large at the lower end, and the annular groove is located at the lower side of the convex block.

6. A wheel connection device for a trolley according to claim 1, characterized in that: An articulated seat is provided on the vehicle body connecting rod, and the middle part of the unlocking wrench is rotatably connected to the articulated seat through a pin shaft.

7. A wheel connection device for a trolley according to claim 6, characterized in that: The hinge seat is U-shaped and includes two elastic arms and a closing portion connecting the two elastic arms; the unlocking wrench is located between the two elastic arms of the U-shaped hinge seat; two connecting holes are provided on the vehicle body connecting rod, and each of the elastic arms is arranged in the corresponding connecting hole.

8. A wheel connection device for a trolley according to claim 7, characterized in that: The ends of the two elastic arms of the hinge seat are provided with hooks, the connecting hole is a through hole, and the body connecting rod is provided with a hanging part on the back of the through hole, and the hook of each elastic arm passes through the corresponding through hole from the front and then hooks on the hanging part.

9. A wheel connection device for a trolley according to claim 7, characterized in that: Each elastic support arm of the hinge seat is provided with two upper and lower hooks, a hinge groove is provided between the two hooks, and pins are provided at both ends of the unlocking wrench, and the two pins are rotatably arranged in the two hinge grooves respectively.

10. A trolley, characterized in that: The invention comprises a vehicle body, a wheel assembly and a wheel connecting device for a trolley as described in any one of claims 1 to 9, wherein the wheel assembly is connected to the wheel connecting rod, and the vehicle body is connected to the vehicle body connecting rod.

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