Anti-loosening flat trolley
Through the design of the limited sliding structure, the sliding sleeve is limited by the limiting groove, which solves the problem of loose handles of traditional flatbed trolleys and achieves higher stability and safety.
Patent Information
- Application Number
- CN202422694678.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-04
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-11-04
AI Technical Summary
The handles of traditional flatbed trolleys tend to loosen after long-term use, leading to increased safety hazards.
The limited sliding structure is adopted. Through the cooperation between the sliding sleeve and the limiting groove, the sliding sleeve is limited by the inner walls on the front and rear sides of the limiting groove, avoiding the wear of the hinge shaft and ensuring the stability of both ends of the handle.
It effectively prevents the handle from loosening, eliminates safety hazards, improves the stability and strength of the handle, and prevents accidents.
Smart Images
Figure CN223327531U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a flatbed trolley, in particular to an anti-loosening flatbed trolley. Background Art
[0002] A flatbed trolley is a simple means of transportation that relies on manpower to pull or push. In order to facilitate the transportation, carrying and placement of the flatbed trolley, the handle of the flatbed trolley is set to a foldable structure. When not in use, the handle is in a folded state and fits against the body of the flatbed trolley, effectively reducing the space occupied. When needed, the handle will be unfolded. At this time, the handle is almost perpendicular to the body of the flatbed trolley, making it easy for users to push and pull the flatbed trolley by the handle.
[0003] The foldable function of a traditional flatbed trolley mainly relies on a limit steel rod that can move up and down. The handle is U-shaped, and the two ends of the handle are hinged to the limit seats on both sides of the body. One side of the limit seat is provided with an opening that penetrates its internal space, so that the two ends of the handle can be folded when the handle is folded. At the same time, an oblong hole is provided on the limit seat, and the end of the limit steel rod passes through the oblong hole and is connected to the limit seat by a tension spring. When the handle is not folded, the two ends of the handle are restricted between the limit steel rod and the inner wall of the limit seat. When the handle needs to be folded, just press the limit steel rod down, and the limit steel rod will move down along the inner wall track of the oblong hole. As the limit steel rod moves down to a position where the two ends of the handle can no longer be limited, the handle can be folded through the opening with its own hinge point as the center, thereby realizing the folding of the handle.
[0004] Although the above structure can make the flatbed trolley foldable, as the limiting steel rod continuously moves up and down along the inner wall trajectory of the oblong hole, the inner wall of the oblong hole will be worn, resulting in a larger gap between the inner wall of the oblong hole and the limiting steel rod. At this time, the limiting force of the limiting steel rod on the two ends of the handle will become weaker, and the handle will become loose. In order to be light, the handle of a traditional flatbed trolley is hollow inside, and the contact area between the outer wall of the limiting steel rod and the outer wall of the two ends of the handle is small. Therefore, when the limiting steel rod restricts the two ends of the handle, the pressure applied to the handle can easily cause the two ends of the handle to deform, thereby causing the two ends of the handle that were originally firmly limited to become loose. Once the handle is loose, it will not only cause the handle angle to change, making pushing and pulling more difficult, but also easily cause accidents, posing certain safety hazards. Summary of the Invention
[0005] The utility model aims to solve the existing technical problem and provide an anti-loosening flatbed trolley, which can effectively prevent the handle from loosening after long-term use and effectively eliminate safety hazards.
[0006] The technical solution adopted by the utility model to solve the above technical problems is:
[0007] The utility model discloses an anti-loosening flatbed handcart, comprising a body and a handle. Limit seats are provided on the left and right sides of the front end of the body, and the ends of both ends of the handle are connected to the limit seats on the left and right sides, and a limit groove is provided at the center of the upper surface of the limit seat; the left and right sides of the upper surface of the limit seat are provided with extension arms located on the left and right sides of the upper notch of the limit groove; the upper ends of the extension arms on the left and right sides are connected by a hinge shaft; the ends of both ends of the handle are hinged between the extension arms on the left and right sides through the hinge shaft; the lower end surfaces of the two ends of the handle are higher than the upper surface of the limit seat; a limit sliding structure is provided at both ends of the handle; the limit groove can limit the limit sliding structure through the inner walls on the front and rear sides; when the limit sliding structure slides upward and disengages from the limit groove, the two ends of the handle can be folded with the hinge shaft as the center.
[0008] The limited sliding structure includes a sliding sleeve that is sleeved on the outside of the two ends of the handle, and the inner wall of the sliding sleeve fits with the outer wall of the handle; the lower end of the sliding sleeve is inserted into the limiting groove and fits with the bottom of the limiting groove; the front side wall of the lower part of the sliding sleeve fits with the front inner wall of the limiting groove, and the rear side wall of the lower part of the sliding sleeve fits with the rear inner wall of the limiting groove; the left and right sides of the outer wall of the sliding sleeve are provided with first oblong holes that are symmetrical to each other; the hinge shaft passes through the first oblong holes on the left and right sides of the sliding sleeve at the same time, and the upper outer wall of the hinge shaft fits with the upper inner wall of the first oblong hole; the upper ends of the sliding sleeves on the left and right sides are connected by a lifting rod.
[0009] The outer walls on the left and right sides of the sliding sleeve are provided with a plurality of second oblong holes evenly distributed from bottom to top; the second oblong holes are located above the first oblong holes; the two ends of the handle are provided with a plurality of auxiliary shafts corresponding to the positions of the second oblong holes; the left and right ends of the auxiliary shafts respectively pass through the second oblong holes on the left and right sides; the upper outer wall of the auxiliary shaft is in contact with the upper inner wall of the second oblong hole.
[0010] The handle itself forms a U-shaped opening; a plurality of grip rods evenly distributed from bottom to top are arranged in the U-shaped opening, and the grip rods are located above the lifting rods.
[0011] The upper end of the rear inner wall of the limiting groove is higher than the upper end of the front inner wall of the limiting groove; the upper end of the rear inner wall of the limiting groove is lower than the hinge shaft.
[0012] The limiting seat is arranged on the left and right sides of the front side wall of the vehicle body or on the left and right sides of the upper surface of the front end of the vehicle body.
[0013] The limiting seat can be fixed to the vehicle body by welding or screws.
[0014] The beneficial effects of the utility model are:
[0015] The camming mechanism of the present invention is to prevent the sliding sleeve from sliding out of the handle when the camming mechanism is in a state of being loosened and the handle being loosened, so that the camming mechanism can be prevented from sliding out of the handle when the camming mechanism is in a state of being loosened and the handle being loosened. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic structural diagram of the utility model anti-loosening flatbed trolley;
[0017] Figure 2 yes Figure 1 An enlarged view of part A;
[0018] Figure 3 This is a cross-sectional view of the utility model anti-loosening flatbed trolley;
[0019] Figure 4 yes Figure 3 An enlarged view of part B;
[0020] Figure 5 This is a schematic diagram of the structure when the upper ends of the left and right sliding sleeves are connected by a lifting rod;
[0021] Figure 6 It is a structural diagram of the limit seat;
[0022] Figure 7 It is a partial structural diagram of an existing flatbed trolley. DETAILED DESCRIPTION
[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:
[0024] See also Figures 1 to 6The trolley is a kind of anti-loosening flatbed trolley, comprising a body 1 and a handle 3. A limit seat 4 is provided on the left and right sides of the front end of the body 1, and the ends of the two ends of the handle 3 are connected to the limit seats 4 on the left and right sides. A limit groove 5 is provided in the center of the upper surface of the limit seat 4; the left and right sides of the upper surface of the limit seat 4 are provided with an extension arm 6 located on the left and right sides of the upper notch of the limit groove 5; the upper ends of the extension arms 6 on the left and right sides are connected by a hinge shaft 7; the ends of the two ends of the handle 3 are hinged between the extension arms 6 on the left and right sides through the hinge shaft 7; the lower end surface of the two ends of the handle 3 is higher than the upper surface of the limit seat 4; a limit sliding structure is provided at both ends of the handle 3; the limit groove 5 can limit the limit sliding structure through the inner walls on the front and rear sides; when the limit sliding structure slides upward and disengages from the limit groove 5, the two ends of the handle 3 can be folded with the hinge shaft 7 as the center.
[0025] The limited sliding structure includes a sliding sleeve 8 that is sleeved on the outside of the two ends of the handle 3, and the inner wall of the sliding sleeve 8 fits with the outer wall of the handle 3; the lower end of the sliding sleeve 8 is inserted into the limiting groove 5 and fits with the bottom of the limiting groove 5; the front side wall of the lower part of the sliding sleeve 8 fits with the front inner wall of the limiting groove 5, and the rear side wall of the lower part of the sliding sleeve 8 fits with the rear inner wall of the limiting groove 5; the left and right sides of the outer wall of the sliding sleeve 8 are provided with first oblong holes 9 that are symmetrical to each other; the hinge shaft 7 passes through the first oblong holes 9 on the left and right sides of the sliding sleeve 8 at the same time, and the upper outer wall of the hinge shaft 7 fits with the upper inner wall of the first oblong hole 9; the upper ends of the sliding sleeves 8 on the left and right sides are connected by a lifting rod 10.
[0026] The outer walls on the left and right sides of the sliding sleeve 8 are provided with a plurality of second oblong holes 11 evenly distributed from bottom to top; the second oblong holes 11 are located above the first oblong hole 9; the two ends of the handle 3 are provided with a plurality of auxiliary shafts 12 corresponding to the positions of the second oblong holes 11; the left and right ends of the auxiliary shafts 12 respectively pass through the second oblong holes 11 on the left and right sides; the upper outer wall of the auxiliary shaft 12 is in contact with the upper inner wall of the second oblong hole 11.
[0027] The handle 3 itself forms a U-shaped opening 13 ; a plurality of gripping rods 14 evenly distributed from bottom to top are provided in the U-shaped opening 13 , and the gripping rods 14 are located above the lifting rod 10 .
[0028] The upper end of the rear inner wall 501 of the limiting groove 5 is higher than the upper end of the front inner wall 502 of the limiting groove 5 ; the upper end of the rear inner wall 501 of the limiting groove 5 is lower than the hinge shaft 7 .
[0029] The limiting seat 4 is arranged on the left and right sides of the front side wall of the vehicle body or on the left and right sides of the upper surface of the front end of the vehicle body 1.
[0030] The limiting seat 4 can be fixed to the vehicle body 1 by welding or screws.
[0031] The method of using the utility model is as follows:
[0032] When the handle 3 is folded, the two ends of the handle 3 can be folded by pressing the limiting steel rod 201 downward, and the limiting steel rod 201 will move downward along the inner wall of the oblong hole 203. When the limiting steel rod 201 moves down to the position where the two ends of the handle 3 cannot be limited, the handle 3 can be folded around its own hinge point through the opening 202, thereby realizing the folding of the handle 3.
[0033] When the handle 3 is folded, the angle formed between the handle 3 and the vehicle body becomes smaller and smaller, and the handle 3 is finally folded.
[0034] When the handle 3 in the folded state needs to be unfolded for use again, the handle 3 can be held and folded forward with the hinge shaft 7 as the center. At this time, the angle formed by the handle 3 and the vehicle body 1 continues to increase, and finally the ends of the handle 3 are located directly above the limit groove 5, so that the sliding sleeve 8 is also directly above the limit groove 5. Then the sliding sleeve 8 automatically moves downward under the action of gravity. As the sliding sleeve 8 moves downward, the lower end of the sliding sleeve 8 will penetrate into the limit groove 5 and fit with the bottom of the limit groove 5. At the same time, the sliding sleeve 8 is clamped between the front and rear inner walls of the limit groove 5 to achieve the limitation of the sliding sleeve 8, and finally the limitation of the two ends of the handle 3 is achieved.
[0035] In summary, when the lower end of the sliding sleeve 8 is stuck in the limiting groove 5, the limiting groove 5 uses its own front and rear inner walls to limit the sliding sleeve 8, thereby limiting the two ends of the handle 3. Therefore, even if the hinge shaft 7 moves frequently in the first oblong hole 9 and causes the inner wall of the first oblong hole 9 to wear, it will not affect the stability of the lower end of the sliding sleeve 8 when it is stuck in the limiting groove 5, and effectively avoids the situation where the two ends of the handle 3 become loose due to the wear of the inner wall of the first oblong hole 9. Moreover, the front and rear inner walls of the limiting groove 5 are both plane, which can ensure the limiting surface of the limiting groove 5 to the greatest extent. The occupant of the handle 3 is held in the airtight container 8 and the handle 3 is held in the airtight container 8. The occupant of the handle 3 is held in the airtight container 8 and the handle 3 is held in the airtight container 8. The occupant of the handle 3 is held in the airtight container 8. The occupant of the handle 3 is held in the airtight container 8. The occupant of the handle 3 is held in the airtight container 8. The occupant of the handle 3 is held in the airtight container 8. The occupant of the handle 3 is held in the airtight container 8. The occupant of the handle 3 is held in the airtight container 8. The occupant of the handle 3 is held in the airtight container 8.
[0036] The outer walls on the left and right sides of the sliding sleeve 8 are provided with a plurality of second oblong holes 11 evenly distributed from bottom to top. The second oblong holes 11 are located above the first oblong hole 9. Both ends of the handle 3 have a plurality of auxiliary shafts 12 corresponding to the positions of the second oblong holes 11. The left and right ends of the auxiliary shafts 12 pass through the second oblong holes 11 on the left and right sides respectively. The upper outer wall of the auxiliary shaft 12 fits with the upper inner wall of the second oblong hole 11. The cooperation between the end of the auxiliary shaft 12 and the second oblong hole 11 can further improve the stability of the sliding sleeve 8 when it moves up and down, and the presence of the hinge shaft 7 and the plurality of auxiliary shafts 12 can form at least two support points in the axial direction of the sliding sleeve 8, thereby further limiting the deformation of the sliding sleeve 8 and further ensuring the anti-loosening effect.
[0037] The handle 3 itself forms a U-shaped opening 13, and a number of grip rods 14 are evenly distributed from bottom to top in the U-shaped opening 13. The grip rods 14 are located above the lifting rod 10. When lifting the lifting rod 10 upward, the user can hold one of the grip rods 14 as a fulcrum to make the lifting work smoother. At the same time, the grip rods 14 can serve as reinforcement ribs, which can effectively improve the strength of the handle 3.
[0038] The upper end of the rear inner wall 501 of the limiting groove 5 is higher than the upper end of the front inner wall 502 of the limiting groove 5, and the upper end of the rear inner wall 501 of the limiting groove 5 is lower than the hinge shaft 7. This structure can not only effectively limit the sliding sleeve 8, but also when the handle 3 is folded and reset, the rear inner wall 501 of the limiting groove 5 can use its own upper end to quickly guide the sliding sleeve 8 into the limiting groove 5, so that the sliding sleeve 8 can quickly slide into the limiting groove 5, thereby realizing the limitation of the sliding sleeve 8.
[0039] The limiting seat 4 is arranged on the left and right sides of the front side wall of the vehicle body or on the left and right sides of the front upper surface of the vehicle body 1. The position of the limiting seat 4 can be set according to actual needs.
[0040] The limit seat 4 can be fixed to the vehicle body 1 by welding or screws. The fixing method of the limit seat 4 can be selected according to actual needs. If it is fixed with screws or bolts and nuts, it can facilitate the disassembly and assembly of the limit seat 4, thereby facilitating the disassembly and assembly of the handle 3.
Claims
1. An anti-loosening flatbed trolley, comprising a body and a handle, wherein limit seats are provided on the left and right sides of the front end of the body, and the ends of the handle are connected to the limit seats on the left and right sides, characterized in that: A limiting groove is provided in the center of the upper surface of the limiting seat; extended arms are provided on the left and right sides of the upper surface of the limiting seat, located on the left and right sides of the upper notch of the limiting groove; the upper ends of the extended arms on the left and right sides are connected by a hinge shaft; the ends of both ends of the handle are hinged between the extended arms on the left and right sides through the hinge shaft; the lower end surfaces of both ends of the handle are higher than the upper surface of the limiting seat; a limiting sliding structure is provided at both ends of the handle; the limiting groove can limit the limiting sliding structure through the inner walls on the front and rear sides; when the limiting sliding structure slides upward and disengages from the limiting groove, the two ends of the handle can be folded with the hinge shaft as the center.
2. The anti-loosening flatbed trolley according to claim 1, characterized in that: The limited sliding structure includes a sliding sleeve that is sleeved on the outside of the two ends of the handle, and the inner wall of the sliding sleeve fits with the outer wall of the handle; the lower end of the sliding sleeve is inserted into the limiting groove and fits with the bottom of the limiting groove; the front side wall of the lower part of the sliding sleeve fits with the front inner wall of the limiting groove, and the rear side wall of the lower part of the sliding sleeve fits with the rear inner wall of the limiting groove; the left and right sides of the outer wall of the sliding sleeve are provided with first oblong holes that are symmetrical to each other; the hinge shaft passes through the first oblong holes on the left and right sides of the sliding sleeve at the same time, and the upper outer wall of the hinge shaft fits with the upper inner wall of the first oblong hole; the upper ends of the sliding sleeves on the left and right sides are connected by a lifting rod.
3. The anti-loosening flatbed trolley according to claim 2, characterized in that: The outer walls on the left and right sides of the sliding sleeve are provided with a plurality of second oblong holes evenly distributed from bottom to top; the second oblong holes are located above the first oblong holes; the two ends of the handle are provided with a plurality of auxiliary shafts corresponding to the positions of the second oblong holes; the left and right ends of the auxiliary shafts respectively pass through the second oblong holes on the left and right sides; the upper outer wall of the auxiliary shaft is in contact with the upper inner wall of the second oblong hole.
4. The anti-loosening flatbed trolley according to claim 2, characterized in that: The handle itself forms a U-shaped opening; a plurality of grip rods evenly distributed from bottom to top are arranged in the U-shaped opening, and the grip rods are located above the lifting rods.
5. The anti-loosening flatbed trolley according to claim 2, characterized in that: The upper end of the rear inner wall of the limiting groove is higher than the upper end of the front inner wall of the limiting groove; the upper end of the rear inner wall of the limiting groove is lower than the hinge shaft.
6. The anti-loosening flatbed trolley according to claim 1, characterized in that: The limiting seat is arranged on the left and right sides of the front side wall of the vehicle body or on the left and right sides of the upper surface of the front end of the vehicle body.
7. The anti-loosening flatbed trolley according to claim 1, characterized in that: The limiting seat can be fixed to the vehicle body by welding or screws.