Tightening structure for connecting pipe of bicycle carrying frame and bicycle body

Abstract

A packing structure of a connecting pipe of a bicycle carrying frame and a bicycle body comprises a square pipe and a packing module, the square pipe is combined with a connecting pipe, the packing module can be inserted into the square pipe, a transmission rod penetrates through a plug body, a round flat connecting part is arranged at the tail end of the transmission rod and is pivoted with a convex lug part at the front end of a packing block, and the packing module is connected with the packing block through a bolt. The packing block is provided with two clamping grooves which are oppositely arranged, a protruding block and a plug are arranged in each clamping groove in a sliding mode, the two protruding blocks are elastically connected through a spring arranged in an action groove, and the transmission rod can push the packing block to move forwards by rotating a nut at the front end of the packing module. And when the transmission rod retreats, the spring can drive the convex block and the plug to retract inwards, so that the packing state is quickly relieved, and the bidirectional fixing device has the advantages of bidirectional fixing, multiple operations, structural integration and the like, and can be used for driving the convex block to slide outwards along the inclined clamping groove so as to push the plug to be opened and embedded into the through hole of the square tube.

Description

Technical Field

[0001] This invention relates to a clamping structure for the connecting tube between the bicycle frame and the vehicle body, and more particularly to a modular structure that can be inserted into the inside of the square connecting tube of the vehicle body and drives the clamping block to apply force in multiple directions through a transmission rod to achieve the purpose of positioning. It is suitable for bicycle frames or outdoor loading equipment that require detachable and repeatable clamping and positioning. Background Technology

[0002] Current common bicycle frame structures typically involve inserting a connector into a square connecting tube on the bicycle body, and then tightening it with bolts, eccentric locks, wedges, or other mechanical fastening elements to achieve positioning and fixation. However, traditional structures often suffer from insufficient tightening force, unstable contact surfaces, or inconvenient operation. Furthermore, most tightening mechanisms only apply pressure in a single direction (such as laterally or downwards), which can easily lead to frame swaying, displacement, or loss of fixation effectiveness after prolonged vibration. While some designs employ multi-point tightening, their complex structure and cumbersome disassembly and assembly hinder quick operation and make repair and replacement difficult.

[0003] Therefore, there is still a need to provide a vehicle carrier clamping structure that is simple in structure, can be clamped in both directions, and has the effect of repeated operation and stable positioning, in order to improve the above problems. Summary of the Invention

[0004] The main objective of this invention is to provide a clamping structure for the connecting tube between the vehicle frame and the vehicle body. The structure drives a clamping block through a transmission rod, and utilizes two protrusions on the clamping block to slide in an inclined slot, pushing the outer plug to open and clamp, thereby achieving multi-directional fixation within the square tube and connecting tube. It has the advantages of simple structure, convenient installation and high stability.

[0005] To achieve the above objectives, a clamping structure for connecting a vehicle frame to a vehicle body tube includes: A square tube is fixed to the vehicle body. The square tube has an opening and a through hole in the side wall. A clamping module is inserted into the square tube, the clamping module comprising: A nut, located at the front end of the clamping module, has an internal thread; A transmission rod with an external thread at its front end is screwed into the nut. The transmission rod extends axially and passes through a plug. The transmission rod has a round flat connecting part at the tail end opposite to its external thread. The plug is positioned in the middle section of the clamping module, its shape corresponds to the internal geometry of the square tube, and it is inserted into the square tube; A clamping block is disposed at the rear end of the clamping module. The front end of the clamping block has a pair of lugs. The pair of lugs are pivotally connected to the round flat connecting part via a pivot shaft, so that the clamping block can be driven synchronously with the axial movement of the transmission rod. The clamping block is provided with two slots arranged opposite each other, each slot having an inclined guide surface and a through motion groove in the center; Each of the slots is provided with a protrusion and a plug. The two protrusions are elastically connected by a spring in the actuation groove. The spring provides elastic force so that the two protrusions can be unfolded or retracted into the slot. Each plug is located outside the corresponding protrusion and is used to be embedded in the through hole of the square tube for tight positioning. A connecting tube is fitted onto the outside of the square tube, and the connecting tube has a pair of positioning holes corresponding to the through hole; Thus, when the nut rotates and drives the transmission rod forward, the clamping block moves forward synchronously and slides outward along the inclined guide surface of the slot through the two protrusions, pushing the corresponding plug to open outward and clamp against the inner wall of the square tube and the inner surface of the connecting tube. The plug can extend between the aforementioned through hole and positioning hole. At the same time, the clamping block also abuts against the bottom wall of the square tube and the bottom surface of the connecting tube, achieving multi-directional clamping and fixing. When the nut rotates and drives the transmission rod to retract, the clamping block moves backward in sync, and the two protrusions slide inward along the inclined guide surface of the slot, causing the corresponding plug to retract and releasing the clamping state.

[0006] In one embodiment, a clamping structure for connecting a vehicle frame to a vehicle body tube includes: A square tube is fixed to the vehicle body. The square tube has an opening and a through hole in the side wall. A clamping module is inserted into the square tube, the clamping module comprising: A nut, located at the front end of the clamping module, has an internal thread; A transmission rod with an external thread at its front end is screwed into the nut. The transmission rod extends axially and passes through a plug. The transmission rod has a round flat connecting part at the tail end opposite to its external thread. The plug is positioned in the middle section of the clamping module, its shape corresponds to the square tube, and it is inserted into the square tube; A clamping block is disposed at the rear end of the clamping module. The front end of the clamping block has a pair of lugs. The pair of lugs are pivotally connected to the round flat connecting part via a pivot shaft, so that the clamping block can be driven synchronously with the axial movement of the transmission rod. The clamping block is provided with two slots arranged opposite each other, each slot having an inclined guide surface and a through motion groove in the center; Each of the slots is provided with a protrusion and a plug. The two protrusions are elastically connected by a spring in the action groove. The spring provides elastic force so that the two protrusions can be unfolded or retracted into the slot. Each plug is located on the outside of the corresponding protrusion and is used to be embedded in the through hole of the square tube for tight positioning. A connecting tube is fitted onto the outside of the square tube, and the connecting tube has a pair of positioning holes corresponding to the through hole; Thus, when the nut rotates and drives the transmission rod forward, the clamping block moves forward synchronously and slides outward along the inclined guide surface of the slot through the two protrusions, pushing the corresponding plug to open outward and clamp it against the inner wall of the square tube and the inner surface of the connecting tube. The plug can extend between the aforementioned through hole and positioning hole, so that the clamping module clamps the inner wall of the square tube and the connecting tube.

[0007] In one embodiment, a clamping structure for connecting a vehicle frame to a vehicle body tube includes: A square tube is fixed to the vehicle body. The square tube has an opening and a through hole in the side wall. A clamping module is inserted into the square tube, the clamping module comprising: A nut, located at the front end of the clamping module, has an internal thread; A transmission rod with an external thread at its front end is screwed into the nut. The transmission rod extends axially and passes through a plug. The transmission rod has a round flat connecting part at the tail end opposite to its external thread. The plug is positioned in the middle section of the clamping module, its shape corresponds to the square tube, and it is inserted into the square tube; A clamping block is disposed at the rear end of the clamping module. The front end of the clamping block has a pair of lugs. The pair of lugs are pivotally connected to the round flat connecting part via a pivot shaft, so that the clamping block can be driven synchronously with the axial movement of the transmission rod. The clamping block is provided with two slots arranged opposite each other, each slot having an inclined guide surface and a through motion groove in the center; Each of the slots is provided with a protrusion and a plug. The two protrusions are elastically connected by a spring in the action groove. The spring provides elastic force so that the two protrusions can be unfolded or retracted into the slot. Each plug is located on the outside of the corresponding protrusion and is used to be embedded in the through hole of the square tube for tight positioning. The action groove is gradually raised from front to back. A connecting tube is fitted onto the outside of the square tube, and the connecting tube has a pair of positioning holes corresponding to the through hole; Thus, when the nut rotates and drives the transmission rod forward, the clamping block moves forward synchronously. The clamping block is gradually pressed down through the action groove, and then pressed and fixed against the bottom wall of the square tube and the bottom surface of the connecting tube. When the nut rotates and drives the transmission rod to retract, the clamping block synchronously removes the clamping state.

[0008] In one embodiment, the two protrusions slide back along the inclined guide surface of the slot under the action of the spring restoring force, and release the corresponding plug from the inner wall of the square tube.

[0009] In one embodiment, the corresponding lug of the clamping block is pivotally connected to the round flat connecting part via a pivot shaft, so that the clamping block is axially pushed along the transmission rod and maintains its direction unchanged during the clamping action.

[0010] In one embodiment, the outer surface of the protrusion is provided with an inclined surface corresponding to the inclined guide surface of the slot, so that the protrusion can slide smoothly when the clamping block moves.

[0011] Based on the above description, the beneficial effects of the present invention are as follows: 1. Features bidirectional clamping function: Through the coordinated action of the clamping block and the plug, it achieves multi-faceted fixation of the bottom and sidewalls of the square tube, improving positioning stability.

[0012] 2. Adopting a sliding guide type bump drive design: Utilizing the inclined guide surface of the slot in conjunction with the bump sliding and spring return mechanism, the operation is stable and can automatically release the clamping.

[0013] 3. High integration of module structure: All components are concentrated in the clamping module, which is easy to install and disassemble, and is conducive to mass production and rapid on-site maintenance.

[0014] 4. Offers reusability and high safety: It does not rely on one-time deformation or destructive fixing methods, and can be assembled and disassembled multiple times, making it suitable for high-frequency use scenarios such as outdoor vehicles.

[0015] 5. Innovative structure with industrial application value: It solves the problems of traditional locking methods, such as the inability to position in multiple directions or the complexity of operation, and improves the practicality and market competitiveness of the car frame product. Attached Figure Description

[0016] Figure 1 : A three-dimensional view of the structure of the present invention.

[0017] Figure 2 : Structural diagram of the compression module.

[0018] Figure 3 : An exploded view of the structure of this invention.

[0019] Figure 4The structural cross-sectional view of the present invention shows the structural cross-section from a top view and the internal structure in a compressed state.

[0020] Figure 5 :yes Figure 4 Structural diagram under pressure.

[0021] Figure 6 The structural cross-sectional view of the present invention is a front-view cross-section and shows the internal structure in the released state.

[0022] Figure 7 :yes Figure 6 The diagram shows that in the clamping state, the clamping module can clamp the bottom of the square tube and the connecting tube.

[0023] Figure 8 It is a top-view structural cross-section of the invention, showing the internal structure to be released from the tightness.

[0024] Explanation of reference numerals in the attached figures: 10: Square tube 11: Through hole 20: Pressurized Module 21: Nut 22: Transmission rod 221: Round and flat connecting part 23: Plug 24: Tightening block 241: Protruding ear 242: Pivot Shaft 243: Card slot 2431: Inclined guide surface 244: Action Gauge 25: Bump 251: Inclined surface 26: Stopper 27: Spring 30: Connecting pipe 31: Positioning hole. Detailed Implementation

[0025] like Figure 1 As shown, the clamping structure of the connecting tube between the vehicle frame and the vehicle body of the present invention includes a square tube 10 and a clamping module 20. The square tube 10 is fixedly installed on the connecting tube 30 on the vehicle body. It has an opening and a pair of through holes 11 provided on the side wall for inserting the clamping module 20 and clamping and positioning. The connecting tube 30 for docking has positioning holes 31 corresponding to the through holes 11.

[0026] Please refer to Figure 2 and Figure 3As shown, the clamping module 20 comprises a nut 21, a transmission rod 22, a plug 23, and a clamping block 24.

[0027] Please continue reading Figure 2 , Figure 3 The nut 21 is disposed at the front end of the clamping module 20 and has an internal thread for screwing the transmission rod 22. The front end of the transmission rod 22 has an external thread, is screwed into the nut 21, and extends axially through the plug body 23, and has a round flat connecting part 221 at the tail end opposite to its external thread.

[0028] The clamping block 24 is disposed at the rear end of the clamping module 20, and its front end has a pair of lugs 241. The pair of lugs 241 are pivotally connected to the round flat connecting part 221 via a pivot shaft 242, so that when the transmission rod 22 is driven by the rotation of the nut 21 to generate axial displacement, the clamping block 24 can be moved back and forth synchronously.

[0029] Please refer to Figure 3 and Figure 6 As shown, the clamping block 24 is provided with a pair of opposing slots 243, each slot 243 having an inclined guide surface 2431 and a through-hole actuation groove 244 in the center. A protrusion 25 and a plug 26 are slidably disposed in each of the two slots 243, and the two protrusions 25 are elastically connected by a spring 27 disposed in the actuation groove 244. In addition, the actuation groove 244 has a shape that gradually rises from front to back.

[0030] In addition, each protrusion 25 is provided with an inclined surface 251 on the side where it engages with the slot 243. The inclined surface corresponds to the inclined guide surface 2431 of the slot 243, which allows the protrusion 25 to slide smoothly during the forward or backward movement of the clamping block 24, avoiding jamming inside the square tube 10, and improving the stability and smoothness of the stopper 26 movement.

[0031] Please refer to Figure 6 and Figure 7 As shown, when the nut 21 rotates and drives the transmission rod 22 forward, the clamping block 24 moves forward synchronously, and the two protrusions 25 slide outward along the inclined guide surface 2431 of the slot 243, and push the plug 26 to move outward, so that its outer side is embedded in the through hole 11 of the corresponding square tube 10, thereby clamping it against the inner wall of the square tube 10 and the bottom surface of the connecting tube 30, achieving the function of pressing and fixing.

[0032] At the same time, such as Figure 4 , Figure 5 As shown, the bottom of the clamping block 24 is also attached to the bottom wall of the square tube 10, so that the case forms clamping in both the vertical and horizontal directions, and has a two-way positioning effect.

[0033] Please refer to Figure 8As shown, when the user rotates the nut 21 in the opposite direction, causing the transmission rod 22 to move the clamping block 24 backward, the two protrusions 25 will slide inward along the inclined guide surface 2431 of the slot 243, and retract into the slot 243 under the restoring force of the spring 27, causing the plug 26 to disengage from the through hole 11, thereby releasing the clamping state.

[0034] Please refer to Figure 4 and Figure 5 As shown, the clamping action of the clamping module 20 is observed from a top-down perspective. Figure 4 Indicating an urgent initial stage, Figure 5 This is the state in which the plug 26 is pushed out by the protrusion 25 and pressed against the through hole 11 and the positioning hole 31.

[0035] From the above description, the usage and advantages of the present invention are as follows: 1. The outward pushing and tightening is achieved by the sliding engagement of the protrusion 25 and the plug 26 with the inclined guide surface 2431 of the slot 243, providing a lateral locking effect.

[0036] 2. As the clamping block 24 moves forward, it can also abut against the bottom surface of the square tube 10 and the bottom wall of the connecting tube 30, providing a vertical stopping effect and forming a multi-directional positioning.

[0037] 3. The spring 27 is set in the action groove 244, which can automatically drive the protrusion 25 to return when the operation is released, thereby improving the efficiency of repeated operation.

[0038] 4. All structures are integrated into a single clamping module 20, which is easy to install and disassemble, and facilitates mass production and maintenance applications.

[0039] 5. The protrusion 25 has an inclined surface 251 structure, which can slide in accordance with the inclined guide surface 2431 of the slot 243, effectively preventing jamming and improving the smoothness and reliability of the clamping and returning actions.

[0040] 6. The present invention can directly tighten both sides by means of the plug 26 (i.e., the action groove 244 is not inclined), or tighten the square tube 10 and the connecting tube 30 by means of the action groove 244 (i.e., without means of the plug 26).

[0041] It should be noted that the above description is a specific embodiment of the present invention and the technical principles used. Any changes made according to the concept of the present invention that do not exceed the spirit covered by the specification and drawings should be within the scope of the present invention and are hereby stated.

Claims

1. A clamping structure for connecting a vehicle frame to a vehicle body tube, characterized in that, Comprising: a square tube fixed on a vehicle body, the square tube having an opening and a through hole arranged on a side wall; a compression module inserted into the square tube, the compression module comprising: a nut arranged at the front end of the compression module, having internal threads; a transmission rod having external threads at the front end, screwed into the nut, the transmission rod extending axially and penetrating a plug body, the transmission rod having a round flat connecting portion at the opposite tail end of the external threads; the plug body is arranged in the middle section of the compression module, corresponding to the internal geometry of the square tube, and is inserted into the square tube; a compression block arranged at the rear end of the compression module, the front end of the compression block having a pair of lug portions, the pair of lug portions being pivoted to the round flat connecting portion through a pivot shaft, so that the compression block can be synchronously driven with the axial movement of the transmission rod; the compression block is provided with two oppositely arranged clamping grooves, each clamping groove having an inclined guide surface and a through action slot in the center; each clamping groove is respectively provided with a protrusion and a plug, the two protrusions are elastically connected by a spring arranged in the action slot, the elastic force provided by the spring allows the two protrusions to expand or retract in the clamping groove, and each plug is arranged outside the corresponding protrusion and is used to embed the through hole of the square tube for compression positioning; a connecting pipe is sleeved on the outside of the square tube, and the connecting pipe has a positioning hole corresponding to the through hole; in this way, when the nut rotates to drive the transmission rod forward, the compression block moves forward synchronously, and the two protrusions slide outward along the inclined guide surface of the clamping groove, pushing the corresponding plug to expand outward and compressing the inner wall of the square tube and the inner surface of the connecting pipe, and the plug can be extended between the through hole and the positioning hole, at the same time, the compression block also abuts against the bottom wall of the square tube and the bottom surface of the connecting pipe, achieving multi-directional compression and fixation; when the nut rotates to drive the transmission rod to retreat, the compression block moves backward synchronously, and the two protrusions slide inward along the inclined guide surface of the clamping groove, driving the corresponding plug to retract and releasing the compression state.

2. A packing structure of a carrier frame and a vehicle body connecting pipe, characterized by comprising: Comprising: a square tube fixed on a vehicle body, the square tube having an opening and a through hole arranged on a side wall; a compression module inserted into the square tube, the compression module comprising: a nut arranged at the front end of the compression module, having internal threads; a transmission rod having external threads at the front end, screwed into the nut, the transmission rod extending axially and penetrating a plug body, the transmission rod having a round flat connecting portion at the opposite tail end of the external threads; the plug body is arranged in the middle section of the compression module, corresponding to the internal geometry of the square tube, and is inserted into the square tube; a compression block arranged at the rear end of the compression module, the front end of the compression block having a pair of lug portions, the pair of lug portions being pivoted to the round flat connecting portion through a pivot shaft, so that the compression block can be synchronously driven with the axial movement of the transmission rod; the compression block is provided with two oppositely arranged clamping grooves, each clamping groove having an inclined guide surface and a through action slot in the center; Each of the clamping grooves is provided with a protrusion and a plug, the two protrusions are elastically connected by a spring arranged in the action groove, the elastic force provided by the spring enables the two protrusions to be unfolded or retracted in the clamping grooves, and each of the plugs is arranged outside the corresponding protrusion and is used for being embedded in the through hole of the square tube to perform the pressing positioning; A connecting pipe is sleeved outside the square tube, and the connecting pipe has a positioning hole corresponding to the through hole; In this way, when the nut rotates to drive the transmission rod to move forward, the pressing block moves forward synchronously, and the two protrusions slide outward along the inclined guide surfaces of the clamping grooves, push the corresponding plugs to be opened outward and press the inner wall of the square tube and the inner surface of the connecting pipe, and the plugs can be extended between the through hole and the positioning hole to achieve the pressing of the pressing module to the inner wall of the square tube and the connecting pipe.

3. A packing structure of a carrier frame and a vehicle body connecting pipe, characterized by comprising: It comprises: A square tube is fixed on the vehicle body, and the square tube has an opening and a through hole arranged on the side wall; A pressing module is inserted into the square tube, and the pressing module comprises: A nut is arranged at the front end of the pressing module and has an internal thread; A transmission rod has an external thread at the front end and is screwed into the nut, the transmission rod extends in the axial direction and is arranged in a plug body, and the transmission rod is provided with a round flat connecting portion at the opposite end of the external thread; The plug body is arranged in the middle of the pressing module, corresponds to the shape of the square tube, and is inserted into the square tube; A pressing block is arranged at the rear end of the pressing module, the front end of the pressing block has a pair of lug portions, the pair of lug portions are pivotally connected with the round flat connecting portion through a pivot shaft, so that the pressing block can be synchronously driven with the axial movement of the transmission rod; The pressing block is provided with two clamping grooves arranged opposite to each other, each of the clamping grooves has an inclined guide surface and a through action groove arranged in the middle; Each of the clamping grooves is provided with a protrusion and a plug, the two protrusions are elastically connected by a spring arranged in the action groove, the elastic force provided by the spring enables the two protrusions to be unfolded or retracted in the clamping grooves, and each of the plugs is arranged outside the corresponding protrusion and is used for being embedded in the through hole of the square tube to perform the pressing positioning; A connecting pipe is sleeved outside the square tube, and the connecting pipe has a positioning hole corresponding to the through hole; In this way, when the nut rotates to drive the transmission rod to move forward, the pressing block moves forward synchronously, and the two protrusions slide outward along the inclined guide surfaces of the clamping grooves, push the corresponding plugs to be opened outward and press the inner wall of the square tube and the inner surface of the connecting pipe, and the plugs can be extended between the through hole and the positioning hole to achieve the pressing of the pressing module to the inner wall of the square tube and the connecting pipe. It comprises:

4. The pressing structure of the bicycle frame and the connecting pipe of the vehicle body according to claim 1, wherein Each of the two protrusions slides along the inclined guide surface of the clamping groove under the restoring force of the spring and retracts, and the corresponding plug is released from the pressing positioning of the inner wall of the square tube.

5. The pressing structure of the bicycle frame and the connecting pipe of the vehicle body according to claim 1, wherein The corresponding lug portions of the pressing block and the round flat connecting portion are pivotally connected through the pivot shaft, so that the pressing block can be axially pushed with the transmission rod and the direction remains unchanged during the pressing operation.

6. The pressing structure of the connection pipe between the bicycle frame and the bicycle body according to claim 1, wherein The outer surface of the protrusion is provided with an inclined surface corresponding to the inclined guide surface of the clamping groove, so that the protrusion can slide in response to the movement of the pressing block.

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