Trailer hook type flag rack

Abstract

The utility model discloses a trailer hook type flag rack which comprises a trailer hook receiver used for being connected with an external vehicle frame and a base arranged on the trailer hook receiver, a vertical plate is arranged on the base in a relatively perpendicular mode, and flag barrels are arranged at the two ends of the vertical plate in the height direction of the base. An inserting hole for a flagpole of an external flag to be inserted is formed in the flag barrel in the height direction of the flag barrel in a penetrating mode, and a fixing piece used for fixing the flagpole arranged in the inserting hole is arranged on the peripheral wall of the flag barrel. A loading piece used for being in linkage fit with the fixing piece to clamp and limit the flagpole and a positioning piece used for guiding and positioning the flagpole are arranged in the flag barrel. The trailer hook type flag rack solves the problems that a traditional trailer hook type flag rack is low in fixing strength for a flagpole of a flag, and the flagpole is prone to shaking or falling off in the flag rack when impacted by acting force.

Description

Technical Field

[0001] This utility model relates to the field of vehicle flag holder technology, specifically a trailer hook-type flag holder. Background Technology

[0002] In vehicle towing scenarios, trailer hitch flag holders are widely used in vehicles such as RVs and trailers to display various logo flags, decorative flags, or warning flags. Existing trailer hitch flag holders typically include a trailer hitch receiver connected to the vehicle frame and a base mounted on it. The base has a flag tube to hold the flagpole. However, traditional trailer hitch flag holders have significant defects in their flagpole fixing structure: on the one hand, there is no dedicated positioning component inside the flag tube, making it difficult to accurately position the flagpole when inserted, resulting in the risk of eccentricity or tilting during initial installation; on the other hand, the traditional fixing structure (such as elastic clips or bolt clamps) lacks linkage with the internal structure of the flag tube, and cannot automatically adjust the clamping force according to changes in external force. When the flagpole is subjected to lateral or longitudinal impact forces, the clamping force of the traditional fixing structure cannot increase synchronously, thus losing the stable constraint on the flagpole. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a trailer hook-type flag holder, which solves the problem that traditional trailer hook-type flag holders have low flagpole fixing strength and are prone to shaking or falling off when the flagpole is subjected to impact.

[0004] To achieve the above objectives, this utility model provides a trailer hook flag holder, including a trailer hook receiver for connecting to the frame of an external vehicle and a base disposed on the trailer hook receiver. A vertical plate is disposed on the base, and flag tubes are disposed at both ends of the vertical plate along the height direction of the base. The flag tubes have insertion holes for inserting flagpoles of external flags along their height direction. A fixing member is disposed on the outer peripheral wall of the flag tube for fixing the flagpole inserted into the insertion hole. A loading member is disposed inside the flag tube for cooperating with the fixing member to clamp and limit the flagpole, and a positioning member is disposed for guiding and positioning the flagpole.

[0005] The advantages of adopting the above technical solution are as follows: The vertical layout of the base and the upright plate forms a stable mechanical support structure, effectively dispersing the torque generated by the flag under the action of external forces such as wind resistance, and avoiding structural deformation caused by uneven force. The positioning component set in the flag tube can perform three-dimensional positioning of the flagpole through a precise guiding structure, ensuring that the flagpole remains vertically centered when inserted, eliminating the swaying risk caused by installation deviation in traditional structures. At the same time, the linkage mechanism between the loading component and the fixing component has dynamic clamping characteristics: when the flagpole is subjected to external impact force (such as vehicle bumps or strong wind loads), the loading component generates an adaptive clamping force through elastic deformation, forming a double constraint with the mechanical locking of the fixing component. This allows the flagpole to maintain its initial fixed strength in the insertion hole, and absorb impact energy through the buffering effect of the loading component, avoiding stress concentration caused by rigid connection. The trailer hook receiver in the above technology is existing technology. Its standard connection method with the vehicle frame ensures the universality and reliability of installation. It is compatible with mainstream trailer hook interfaces and can be quickly installed and removed without additional modification. Since it is existing technology, its structure and function will not be described in detail.

[0006] The present invention further includes the following features: two connecting holes are provided on the flag tube, both of which are connected to the insertion hole and a fixing bolt is threaded into the connecting hole. The fixing bolt has a rotating wheel at its end and the starting end of the fixing bolt is an abutting end for insertion into the insertion hole and abutting against the outer peripheral wall of the flagpole. The fixing bolt is a fastener.

[0007] The advantages of adopting the above technical solution are: the two symmetrically arranged connecting holes in the above technology, together with the threaded fixing bolts, form a two-point radial clamping structure for the flagpole. Compared with the traditional single-point fixing method, the clamping force is more evenly distributed, which can effectively avoid the flagpole from tilting or deforming due to unilateral force. The operator can rotate the wheel to insert or remove the fixing bolts, thereby quickly positioning and initially fixing the flagpole.

[0008] The present invention further comprises: an integrally connected vertical block on the outer peripheral wall of the flag tube, the vertical block having a hollow loading cavity, the loading cavity being connected to the insertion hole; the loading component comprising a loading plate disposed in the insertion hole and a loading spring disposed in the loading cavity; the loading plate having an arc-shaped radial cross-section and its outer wall surface being a contact surface for partially abutting against the outer peripheral wall of the external flagpole; the starting end of the loading spring being connected to the inner wall of the loading cavity, and the ending end of the loading spring being connected to the inner wall surface of the loading plate; the loading spring being a square spring, and the shape of the loading cavity being adapted to the shape of the loading spring.

[0009] The advantages of adopting the above technical solution are as follows: the arc-shaped outer wall of the loading plate forms a surface contact with the flagpole, which evenly distributes the clamping force while reducing local pressure and avoiding damage to the flagpole surface. The loading spring is a square spring, which has improved anti-rotation performance compared to a round spring. With the loading cavity with a suitable shape, it ensures that the spring maintains linear motion during compression, eliminating jamming caused by skewing. When the flagpole is subjected to lateral impact force, the loading plate compresses the loading spring with the displacement of the flagpole. The spring reaction force is evenly transmitted to the flagpole surface through the loading plate, forming a dynamic compensation force opposite to the direction of the impact force, thereby achieving secondary fixation of the flagpole. The clamping and limiting of the flagpole is achieved through the cooperation of the loading plate and the fixing bolts, thereby improving the stability of the flagpole in the insertion hole.

[0010] The present invention further comprises: a positioning block is provided in the loading cavity and the positioning block is integrally connected to the inner wall of the loading cavity; a positioning hole is provided on the positioning block along the extension and retraction direction of the loading spring and the positioning hole is connected to the insertion hole; a positioning shaft is movably arranged in the positioning hole; the beginning end of the positioning shaft is connected to the inner wall of the loading plate; a return spring is sleeved on the positioning shaft; the beginning end of the return spring is connected to the positioning shaft; and the end end of the return spring is connected to the inner peripheral wall of the positioning hole.

[0011] The advantages of adopting the above technical solution are: the positioning block and positioning shaft in the above technology construct a guiding and resetting system for the loading component, further improving the stability and reliability of the clamping mechanism, ensuring that the loading plate maintains a stable trajectory during reciprocating motion, and avoiding clamping failure caused by radial offset. The pre-tightening design of the reset spring allows the loading plate to maintain its initial positioning state when there is no external force, improving the alignment convenience when inserting the flagpole. When the flagpole is subjected to longitudinal impact, the positioning shaft and the loading spring form a double constraint in the orthogonal direction, effectively limiting the displacement of the flagpole.

[0012] The present invention is further provided in that: an elastic pad is laid on the contact surface and the elastic pad is made of wear-resistant rubber material.

[0013] The advantages of adopting the above technical solution are: the elastic pad introduced at the clamping interface introduces a flexible buffer layer, and its surface structure increases the coefficient of friction, maintaining stable clamping force even in wet and slippery environments; the flexible material can adapt to the slight unevenness of the flagpole surface, fill gaps and evenly distribute clamping force, avoiding stress concentration caused by traditional rigid contact; at the same time, the damping characteristics of the elastic pad can absorb vibration energy, reduce high-frequency vibration between the flagpole and the flag tube, reduce noise and extend the service life of the flagpole; the detachable design facilitates maintenance and replacement, and is particularly suitable for high-end flagpoles with protective surface treatments, avoiding coating peeling problems and meeting high requirements for flag integrity.

[0014] The present invention further includes the following: the positioning component includes several guide protrusions evenly distributed circumferentially on the inner peripheral wall of the insertion hole, and the several guide protrusions are combined to form a guide hole for inserting an external flagpole. The guide protrusions are made of elastic rubber material and are inclined relative to the inner peripheral wall of the insertion hole.

[0015] The advantages of adopting the above technical solution are: the guide protrusion structure of the positioning component generates radial guiding force when the flagpole is inserted, realizing automatic centering, significantly shortening the installation alignment time, and improving the convenience of operation. The guide protrusion made of elastic material can adapt to the diameter tolerance of the flagpole, forming a flexible wrapping support, reducing insertion resistance and providing multi-point radial support force, effectively preventing the flagpole from rotating and shifting. The inclined protrusion is easy to be squeezed and deformed when the flagpole is inserted so that the flagpole can be inserted stably. At the same time, after the flagpole is inserted, the initial positioning of the flagpole is achieved, and the force applied by the elastic deformation can act on the outer peripheral wall of the flagpole, thereby improving the stability of the flagpole in the insertion hole. Attached Figure Description

[0016] Figure 1 This is a three-dimensional view of the present invention;

[0017] Figure 2 for Figure 1 Remove the top-view 3D view of the trailer hitch receiver;

[0018] Figure 3 for Figure 1 Remove the bottom-view 3D view of the trailer hitch receiver;

[0019] Figure 4 This is a three-dimensional view of the loading plate and its linkage structure in this utility model;

[0020] Figure 5 This is a partial side cross-sectional view of the neutral block, loading plate, and their linkage structure of this utility model. Detailed Implementation

[0021] This utility model provides a trailer hook-type flag holder, including a trailer hook receiver 11 for connecting to the frame of an external vehicle and a base 1 disposed on the trailer hook receiver 11. A vertical plate 12 is vertically disposed on the base 1. Flag tubes 2 are disposed at both ends of the vertical plate 12 along the height direction of the base 1. Each flag tube 2 has a penetrating hole 21 for inserting a flagpole of an external flag along its height direction. A fixing member is disposed on the outer peripheral wall of the flag tube 2 for fixing the flagpole inserted into the penetrating hole 21. A loading member for interlocking with the fixing member to clamp and limit the flagpole, and a positioning member for guiding and positioning the flagpole, are disposed inside the flag tube 2. Two connecting holes 22 are provided on the top, both of which are connected to the insertion hole 21 and are threaded with fixing bolts 221. A rotating wheel 222 is provided at the end of each fixing bolt 221. The starting end of the fixing bolt 221 is an abutment end 223 for insertion into the insertion hole 21 and abutting against the outer peripheral wall of the flagpole. The fixing bolt 221 is a fixing component. A vertical block 3 is integrally connected to the outer peripheral wall of the flag tube 2, and the vertical block 3 has a hollow loading cavity 31. The loading cavity 31 is connected to the insertion hole 21. The loading component includes a loading plate 32 disposed in the insertion hole 21 and a loading spring 33 disposed in the loading cavity 31. The loading plate 32... The radial cross-section of the loading plate 32 is arc-shaped, and its outer wall surface is a contact surface 321 for partial contact with the outer peripheral wall of the external flagpole. The starting end of the loading spring 33 is connected to the inner wall of the loading cavity 31, and the end of the loading spring 33 is connected to the inner wall surface of the loading plate 32. The loading spring 33 is a square spring, and the shape of the loading cavity 31 is adapted to the shape of the loading spring 33. A positioning block 34 is provided in the loading cavity 31, and the positioning block 34 is integrally connected to the inner wall of the loading cavity 31. A positioning hole 341 is provided on the positioning block 34 along the extension and retraction direction of the loading spring 33, and the positioning hole 341 is connected to the insertion hole 21. A movable part is provided in the positioning hole 341. A positioning shaft 342 is provided, with its starting end connected to the inner wall of the loading plate 32. A return spring 343 is sleeved on the positioning shaft 342, with its starting end connected to the positioning shaft 342 and its end connected to the inner peripheral wall of the positioning hole 341. An elastic pad made of wear-resistant rubber is laid on the contact surface 321. The positioning component includes several guide protrusions 4 evenly distributed circumferentially on the inner peripheral wall of the insertion hole 21. The several guide protrusions 4 are combined to form a guide hole 41 for inserting an external flagpole. The guide protrusions 4 are made of elastic rubber and are inclined relative to the inner peripheral wall of the insertion hole 21.

[0022] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A trailer hitch flag holder, comprising a trailer hitch receiver for connection to an external vehicle frame and a base disposed on the trailer hitch receiver, characterized in that: A vertical plate is provided on the base, and flag tubes are provided at both ends of the vertical plate along the height direction of the base. The flag tubes have insertion holes for inserting flagpoles of external flags along their height direction. A fixing member is provided on the outer peripheral wall of the flag tube for fixing the flagpole inserted into the insertion hole. A loading member is provided inside the flag tube for cooperating with the fixing member to clamp and limit the flagpole, and a positioning member is provided for guiding and positioning the flagpole.

2. A trailer hook-type flag holder according to claim 1, characterized in that: The flag tube has two connecting holes, both of which are connected to the insertion hole and are threaded with fixing bolts. The end of the fixing bolt is provided with a rotating wheel, and the beginning of the fixing bolt is an abutting end for inserting into the insertion hole and abutting against the outer peripheral wall of the flagpole. The fixing bolt is the fixing component.

3. A trailer hook-type flag holder according to claim 2, characterized in that: A vertical block is integrally connected to the outer peripheral wall of the flag tube, and the vertical block is hollow and has a loading cavity. The loading cavity is connected to the insertion hole. The loading component includes a loading plate disposed in the insertion hole and a loading spring disposed in the loading cavity. The radial cross-section of the loading plate is arc-shaped, and the outer wall surface of the loading plate is an abutment surface for partial contact with the outer peripheral wall of the external flagpole. The beginning end of the loading spring is connected to the inner wall of the loading cavity, and the end end of the loading spring is connected to the inner wall surface of the loading plate. The loading spring is a square spring, and the shape of the loading cavity is adapted to the shape of the loading spring.

4. A trailer hook-type flag holder according to claim 3, characterized in that: The loading cavity is provided with a positioning block and is integrally connected to the inner wall of the loading cavity. The positioning block has a positioning hole along the extension and retraction direction of the loading spring and is connected to the insertion hole. A positioning shaft is movably arranged in the positioning hole. The beginning end of the positioning shaft is connected to the inner wall of the loading plate. A return spring is sleeved on the positioning shaft. The beginning end of the return spring is connected to the positioning shaft and the end end of the return spring is connected to the inner peripheral wall of the positioning hole.

5. A trailer hook-type flag holder according to claim 3, characterized in that: An elastic pad is laid on the contact surface, and the elastic pad is made of wear-resistant rubber.

6. A trailer hook-type flag holder according to claim 1, characterized in that: The positioning element includes several guide protrusions evenly distributed circumferentially on the inner peripheral wall of the socket. The combination of several guide protrusions forms a guide hole for inserting an external flagpole. The guide protrusions are made of elastic rubber material and are inclined relative to the inner peripheral wall of the socket.

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