Water pipe car structure

Abstract

The utility model discloses a water pipe car structure, including handrail pipe, wheel assembly, collection pipe wheel disc and front end support subassembly. Front end support subassembly is by the opposite arrangement's support side plate and U shape support pipe is composed, and the support side plate front end is equipped with the V-shaped guide opening that is formed by the first slotted hole and the second slotted hole meet, and the both sides of U shape support pipe upper end are equipped with the limit axle, and the limit axle can slide in the guide opening and cooperate with the first, second positioning slot of support side plate front end inner wall, realizes the positioning of folding and unfolding. Handrail pipe and wheel assembly are detachable connection in the upper, lower end of support side plate respectively. In the folding state, the limit axle is located in the first slotted hole top portion, and the limit axle can be made to slide to the guide opening bottom portion by pressing handrail pipe, and the limit axle is clamped into the second slotted hole top portion under the action of gravity after releasing, realizes the extension of structure and locks. The structure is simple to operate, switches rapidly, and has good stability and portability.

Description

Technical Field

[0001] This utility model relates to the field of folding machinery technology, and in particular to a water pipe cart structure. Background Technology

[0002] As a tool used for auxiliary transport or water operations, water hose carts often need to be transported and stored between different usage scenarios. These structures typically require a balance between stability and portability. In daily use, water hose carts not only need to maintain good support strength and structural stability when unfolded, but also should be easily folded and stored when not in use to minimize space occupation.

[0003] However, in practical applications, traditional structures often suffer from complex operations, insecure locking, or the need for additional tools during the folding and unfolding process. Especially in outdoor or waterside environments, users require quick and reliable unfolding and folding of the hose reel, which places higher demands on the design of the connection structure, guiding positioning, and locking mechanism. Therefore, ensuring structural stability while achieving a smooth transition between folding and unfolding, along with a reliable self-locking effect, has become an important direction for the improvement of this type of product. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a water pipe cart structure that enables rapid switching and reliable self-locking between folded and unfolded states, thereby improving operational convenience and safety.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a water pipe cart structure, including a handrail tube, a wheel assembly, a pipe retractor wheel, and a front support assembly;

[0006] The front-end support assembly includes a pair of bracket side plates and a U-shaped support tube arranged opposite to each other;

[0007] The front end of the bracket side plate is provided with a downwardly inclined V-shaped guide opening, which is composed of a first strip hole and a second strip hole that intersect each other;

[0008] The upper end of the U-shaped support tube is fixed with limiting shafts on both sides. The limiting shafts pass through the V-shaped guide opening and can slide within the V-shaped guide opening.

[0009] The front inner wall of the bracket side plate is provided with a first positioning groove and a second positioning groove that meet at the bottom. The angle between the first positioning groove and the second positioning groove is consistent with the angle between the V-shaped guide opening in both direction and angle.

[0010] The handrail tube is detachably connected to the upper end of a pair of bracket side plates;

[0011] The wheel assembly is detachably connected to the lower end of a pair of bracket side plates;

[0012] When the limiting shaft is located at the top of the first strip hole, the water pipe cart structure is in a folded state.

[0013] Press down on the handrail tube to drive the limiting shaft to slide downwards along the V-shaped guide opening to its bottom;

[0014] Release the downward pressure on the handrail tube, and under the weight of the water pipe cart structure itself, the limiting shaft slides upward along the V-shaped guide opening and engages with the top of the second strip hole, thereby locking the water pipe cart structure in the extended use state.

[0015] Furthermore, a bearing sleeve is rotatably fitted on the limiting shaft, and the outer circumferential surface of the bearing sleeve slides in contact with the inner wall of the V-shaped guide opening; when the limiting shaft slides within the V-shaped guide opening, the bearing sleeve rolls within the V-shaped guide opening.

[0016] Furthermore, the upper end of the U-shaped support tube is provided with threaded holes on both sides; the limiting shaft is a bolt, the threaded end of which is screwed into the threaded hole of the U-shaped support tube for fixation; the end of the limiting shaft away from the U-shaped support tube is provided with a limiting nut with a diameter greater than the width of the V-shaped guide opening.

[0017] Furthermore, the inner walls of the first positioning groove and the second positioning groove are embedded with nylon wear-resistant bushings;

[0018] The nylon wear-resistant bushing has a U-shaped cross-section, covering the bottom surface and side walls of the first and second positioning grooves, and the bushing thickness is 1.2–1.5 mm.

[0019] Furthermore, the side plate of the bracket is a double-layer stamped steel plate structure, with the inner plate being stamped to form the first positioning groove and the second positioning groove, and the outer plate being stamped to form the V-shaped guide opening;

[0020] The inner and outer layers are fixed together by laser welding, and the angle between the V-shaped guide opening and the positioning groove is controlled within ±0.5°.

[0021] Furthermore, an elastic locking element is provided at the top intersection of the first and second strip holes;

[0022] When the limiting shaft slides to the bottom of the V-shaped guide opening, the elastic locking member engages in the annular groove on the side wall of the limiting shaft, restricting the axial displacement of the limiting shaft in the non-operating state.

[0023] Furthermore, a dust cover is detachably connected to the bottom of the U-shaped support tube;

[0024] The dust cover covers the opening ends of the first and second positioning slots, and the edge of the cover is provided with elastic buckles that engage with the side plate of the bracket.

[0025] The beneficial effects of this utility model are:

[0026] (1) Easy folding and unfolding operation: By setting a V-shaped guide opening and a limiting shaft at the front end of the side plate of the bracket, the limiting shaft can slide smoothly along the guide opening. Users only need to press down or release the handrail tube to complete the folding and unfolding, reducing operation steps and requiring no additional tools.

[0027] (2) Reliable positioning and locking: The first and second positioning grooves are at the same angle as the V-shaped guide opening. With the sliding trajectory of the limiting shaft, the limiting shaft can automatically lock into the top of the second strip hole in the unfolded state, forming a stable lock, preventing accidental folding during use and improving safety.

[0028] (3) Stable structure and easy to carry: The combination of U-shaped support tube and bracket side plate provides good load-bearing support capacity. At the same time, the handrail tube and wheel assembly are detachable, which facilitates transportation and storage and is suitable for various usage scenarios.

[0029] (4) Gravity-assisted locking: During the deployment process, the water pipe truck’s own weight is used to make the limit shaft slide into the locking position, which reduces the strength required for operation and makes it easy for users with different physical conditions to use. Attached Figure Description

[0030] Figure 1 This is a structural schematic diagram of the water pipe cart in the folded state of this utility model;

[0031] Figure 2 This is a structural schematic diagram of the water pipe truck in its extended and usable state according to this utility model;

[0032] Figure 3 This is a schematic diagram of the inner structure of the bracket side plate in this utility model;

[0033] Figure 4 This is an enlarged view of the structure of the limiting shaft in this utility model;

[0034] Figure 5 This is an enlarged view of the V-shaped guide opening in this utility model.

[0035] Reference numerals: 1. Handrail tube; 2. Wheel assembly; 3. Retracting wheel disc; 4. Front support assembly; 41. Bracket side plate; 42. U-shaped support tube; 5. V-shaped guide opening; 51. First strip hole; 52. Second strip hole; 6. Limiting shaft; 7. First positioning groove; 8. Second positioning groove; 9. Bearing sleeve; 10. Limiting nut; 13. Elastic locking element. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0037] Example 1, referring to Figures 1 to 4 This is the first embodiment of the present invention, which provides a water pipe cart structure, including a handle tube 1, a wheel assembly 2, a pipe-retracting wheel 3, and a front support assembly 4. The front support assembly 4 consists of a pair of opposing bracket side plates 41 and a U-shaped support tube 42. The front end of the bracket side plate 41 is provided with a downwardly inclined V-shaped guide opening 5, which is formed by intersecting first strip hole 51 and second strip hole 52. Limiting shafts 6 are fixedly provided on both sides of the upper end of the U-shaped support tube 42, and the limiting shafts 6 pass through the V-shaped guide opening 5 and can slide therein. The inner wall of the front end of the bracket side plate 41 is provided with a first positioning groove 7 and a second positioning groove 8 that intersect at the bottom, and the included angle between the first positioning groove 7 and the second positioning groove 8 is consistent with the included angle of the V-shaped guide opening 5 in both direction and angle. The included angle ranges from 45° to 60°. The handrail tube 1 is detachably connected to the upper end of the bracket side plate 41, the wheel assembly 2 is detachably connected to the lower end of the bracket side plate 41, and the retracting wheel 3 is installed at the structural adaptation position to achieve the corresponding operation function.

[0038] In this embodiment, when the limiting shaft 6 is located at the top of the first strip-shaped hole 51, the water pipe cart structure is in a folded state. When in use, the user presses down on the handle tube 1, driving the limiting shaft 6 to slide downwards along the V-shaped guide opening 5 to the bottom of the opening. Then, the handle tube 1 is released, and under the weight of the water pipe cart structure itself, the limiting shaft 6 slides upwards along the other side of the V-shaped guide opening 5 and automatically engages at the top position of the second strip-shaped hole 52, thus locking the water pipe cart structure in the extended use state. At this time, the angle between the U-shaped support tube 42 and the support tube of the wheel assembly 2 is greater than 90°. In contrast, when a traditional water pipe cart structure is in the extended use state, the angle between the U-shaped support tube 42 and the support tube of the wheel assembly 2 is less than 90°. This embodiment, by designing the angle between the U-shaped support tube 42 and the support tube of the wheel assembly 2 in the extended state to be greater than 90°, lowers the overall center of gravity in the vertical direction, significantly improving the overall extended stability of the water pipe cart structure and making it less prone to tipping over.

[0039] Working principle of Example 1:

[0040] By utilizing the angle between the V-shaped guide opening 5 and the positioning groove, the sliding path of the limiting shaft 6 during folding and unfolding is controllable and stable; automatic locking is achieved by its own gravity, reducing additional operation; and the detachable handle tube 1 and wheel assembly 2 not only meet the convenience of transportation and storage, but also ensure the load-bearing and stability performance during use.

[0041] Technical effects of Example 1:

[0042] The technical solution adopted in this embodiment can achieve rapid switching between folding and unfolding, avoid accidental folding of the structure during use, and improve operational safety; at the same time, it reduces the user's operational burden and improves the applicability and convenience of the water pipe truck in outdoor and waterside environments.

[0043] Example 2, refer to Figure 4 This is the second embodiment of the present invention. Unlike the previous embodiment, Embodiment 2 is a further improvement on Embodiment 1. A bearing sleeve 9 is rotatably sleeved on the limiting shaft 6, and the outer circumferential surface of the bearing sleeve 9 maintains sliding contact with the inner wall of the V-shaped guide opening 5. When the limiting shaft 6 slides within the V-shaped guide opening 5, the bearing sleeve 9 can roll within the guide opening, thereby reducing sliding friction resistance.

[0044] The upper end of the U-shaped support tube 42 is provided with threaded holes on both sides. The limiting shaft 6 is in the form of a bolt, and its threaded end is screwed into the threaded hole of the U-shaped support tube 42 for fixation. The end of the limiting shaft 6 away from the U-shaped support tube 42 is provided with a limiting nut 10. The diameter of the limiting nut 10 is greater than the width of the V-shaped guide opening 5 to prevent the limiting shaft 6 from accidentally coming out.

[0045] To further improve structural durability and user experience, the inner walls of both the first positioning groove 7 and the second positioning groove 8 are fitted with nylon wear-resistant bushings (not shown). The nylon wear-resistant bushings have a U-shaped cross-section, covering the bottom surface and side walls of the first and second positioning grooves 7 and 8, and the bushing thickness is 1.2–1.5 mm. The U-shaped covering design effectively prevents the bushings from falling off during long-term use, and reduces direct friction between metal parts by lowering the coefficient of friction, thus reducing noise and extending the service life of the structure.

[0046] Working principle of Example 2:

[0047] During unfolding or folding operations, the user presses down or releases the handle tube 1, driving the limiting shaft 6 to slide along the V-shaped guide opening 5. Because the bearing sleeve 9 rolls against the inner wall of the guide opening, the sliding process is smoother, reducing resistance and wear caused by friction. When the limiting shaft 6 reaches the positioning groove, the nylon wear-resistant bushing provides cushioning and stable support, ensuring it accurately engages in the positioning groove and achieves stable locking. The limiting nut 10 acts as an anti-disengagement device at the extreme positions, ensuring operational safety.

[0048] Technical effects of Example 2:

[0049] This improved structure maintains ease of folding and unfolding while significantly enhancing the smoothness and durability of sliding parts, reducing metal friction noise, extending the service life of key components, and improving safety and reliability during use through an anti-detachment design.

[0050] Example 3, referring to Figure 5 This is the third embodiment of the present invention. Unlike the previous embodiment, embodiment 3 is a further improvement on embodiment 1.

[0051] The side plate 41 of the bracket adopts a double-layer stamped steel plate structure. The inner plate is stamped to form the first positioning groove 7 and the second positioning groove 8, and the outer plate is stamped to form the V-shaped guide opening 5. The inner and outer plates are fixed by laser welding, and the angle between the V-shaped guide opening 5 and the positioning groove is controlled within ±0.5°. This structure has a clear division of labor: the inner plate, as a load-bearing component, ensures positioning strength, while the outer plate precisely guides the sliding of the limiting shaft 6, avoiding jamming caused by structural deformation after long-term use.

[0052] An elastic locking element 13 is provided at the top intersection of the first strip hole 51 and the second strip hole 52. When the limiting shaft 6 slides to the bottom of the V-shaped guide opening 5, the elastic locking element 13 is engaged in the annular groove on the side wall of the limiting shaft 6 to achieve mechanical self-locking and prevent the limiting shaft 6 from axial displacement in the non-operating state, thereby maintaining the stability of the water pipe truck structure.

[0053] The bottom of the U-shaped support tube 42 is detachably connected to a dust cover (not shown). The dust cover covers the opening ends of the first positioning groove 7 and the second positioning groove 8. The edge of the cover is provided with elastic buckles (not shown) that engage with the side plate 41 of the bracket. This dust cover can effectively prevent sand and debris from entering the positioning groove and avoid jamming caused by the accumulation of foreign objects; the detachable design facilitates maintenance and cleaning, and the elastic buckles ensure that they will not accidentally fall off in a vibration environment.

[0054] Working principle of Example 3:

[0055] During the sliding process, the outer plate of the double-layer stamped structure guides the sliding path of the limiting shaft 6, while the inner plate provides stable positioning support, ensuring smooth transitions of the limiting shaft 6 between different states. Upon reaching the bottom, the elastic locking element 13 automatically engages with the annular groove of the limiting shaft 6, achieving immediate mechanical self-locking and preventing accidental sliding caused by vibration or external force. Simultaneously, the dust cover effectively prevents external dust and debris from entering the positioning groove, maintaining the smoothness of the sliding and locking structure.

[0056] Technical effects of Example 3:

[0057] This embodiment, while maintaining the ease of folding and unfolding operations, further enhances the structure's safety, durability, and environmental adaptability. Double-layer stamped steel plates combined with laser welding technology ensure long-term dimensional accuracy and reliable operation; the elastic locking element 13, in conjunction with the annular groove, achieves highly reliable self-locking, enhancing stability; the dust cover design effectively reduces the impact of environmental factors on structural performance, extends service life, and reduces maintenance frequency.

[0058] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A water pipe cart structure, comprising a handle tube (1), a wheel assembly (2), a pipe retractor disc (3), and a front end support assembly (4), characterized in that: The front-end support assembly (4) includes a pair of support side plates (41) and a U-shaped support tube (42) arranged opposite to each other; The front end of the bracket side plate (41) is provided with a downwardly inclined V-shaped guide opening (5), which is composed of a first strip hole (51) and a second strip hole (52) that intersect each other. The upper end of the U-shaped support tube (42) is fixedly provided with limiting shafts (6) on both sides. The limiting shafts (6) pass through the V-shaped guide opening (5) and can slide within the V-shaped guide opening (5). The front inner wall of the bracket side plate (41) is provided with a first positioning groove (7) and a second positioning groove (8) that meet at the bottom. The angle between the first positioning groove (7) and the second positioning groove (8) is consistent with the angle of the V-shaped guide opening (5). The handrail tube (1) is detachably connected to the upper end of a pair of bracket side plates (41); The wheel assembly (2) is detachably connected to the lower end of a pair of bracket side plates (41); When the limiting shaft (6) is located at the top of the first strip hole (51), the water pipe cart structure is in a folded state. Press down the handrail tube (1) and drive the limiting shaft (6) to slide down along the V-shaped guide opening (5) to its bottom; Release the downward pressure on the handrail tube (1), and under the action of the water pipe cart structure's own gravity, the limiting shaft (6) slides upward along the V-shaped guide opening (5) and gets into the top of the second strip hole (52), so that the water pipe cart structure is locked in the extended use state.

2. The water pipe truck structure according to claim 1, characterized in that: A bearing sleeve (9) is rotatably sleeved on the limiting shaft (6), and the outer circumferential surface of the bearing sleeve (9) slides in contact with the inner wall of the V-shaped guide opening (5); when the limiting shaft (6) slides in the V-shaped guide opening (5), the bearing sleeve (9) rolls in the V-shaped guide opening (5).

3. The water pipe truck structure according to claim 2, characterized in that: The upper end of the U-shaped support tube (42) is provided with threaded holes on both sides; the limiting shaft (6) is a bolt, the threaded end of which is screwed into the threaded hole of the U-shaped support tube (42) for fixation; the end of the limiting shaft (6) away from the U-shaped support tube (42) is provided with a limiting nut (10) with a diameter greater than the width of the V-shaped guide opening (5).

4. The water pipe truck structure according to claim 3, characterized in that: The inner walls of the first positioning groove (7) and the second positioning groove (8) are fitted with nylon wear-resistant bushings; The nylon wear-resistant bushing has a U-shaped cross section, covering the bottom surface and side walls of the first positioning groove (7) and the second positioning groove (8), and the bushing thickness is 1.2–1.5 mm.

5. The water pipe truck structure according to claim 1, characterized in that: The bracket side plate (41) is a double-layer stamped steel plate structure. The inner plate is stamped to form the first positioning groove (7) and the second positioning groove (8), and the outer plate is stamped to form the V-shaped guide opening (5). The inner and outer layers are fixed by laser welding, and the angle between the V-shaped guide opening (5) and the positioning groove is controlled within ±0.5°.

6. The water pipe truck structure according to claim 1, characterized in that: An elastic locking element (13) is provided at the top intersection of the first strip hole (51) and the second strip hole (52); When the limiting shaft (6) slides to the bottom of the V-shaped guide opening (5), the elastic locking member (13) is engaged in the annular groove on the side wall of the limiting shaft (6), restricting the axial displacement of the limiting shaft (6) in the non-operating state.

7. The water pipe truck structure according to claim 1, characterized in that: The bottom of the U-shaped support tube (42) is detachably connected to a dust cover. The dust cover covers the opening ends of the first positioning groove (7) and the second positioning groove (8), and the edge of the cover is provided with an elastic buckle that engages with the side plate (41) of the bracket.

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