Folding bicycle frame and folding bicycle

Abstract

According to the folding bicycle frame and the folding bicycle provided by the invention, on the premise of ensuring the portability of the folding bicycle, the folding bicycle frame realizes the maintenance of an unfolding posture through the matching of the plug pin and the positioning blind hole; a small-range relative movement space is reserved for the front frame and the rear frame through the size design of the positioning blind holes in the corresponding direction, and on the basis, the hidden damping mechanisms are arranged in the positioning blind holes, so that on one hand, the situation that the folding performance of the folding frame is affected by exposure of the damping mechanisms can be avoided, and on the other hand, the protection performance of the damping mechanisms can be improved; and the damping mechanism is more durable.

Description

Technical Field

[0001] The invention relates to the field of transportation vehicles, and in particular to a folding frame and a folding bicycle. Background Art

[0002] When a user is riding a two-wheeled vehicle, the contact points between the human body and the vehicle include the handlebars and the seat. In order to improve the user's riding experience and avoid the ups and downs of the road being directly transmitted to the handlebars and the seat, two-wheeled vehicles are generally designed with corresponding shock-absorbing mechanisms added to the force transmission paths between the wheels and handlebars, and between the wheels and the seat.

[0003] For foldable two-wheeled vehicles, when designing the shock-absorbing mechanism, it is necessary to take into account the change in the vehicle's posture before and after folding to avoid structural interference. At the same time, it is also necessary to consider issues such as the durability of the shock-absorbing mechanism. Summary of the invention

[0004] Under the premise of ensuring the portability of the folding bicycle, the present invention provides a folding frame and a folding bicycle. The folding frame maintains the unfolded posture through the cooperation of the latch and the positioning blind hole, and a small range of relative movement space is reserved for the front frame and the rear frame by utilizing the size design of the positioning blind hole in the corresponding direction. On this basis, a hidden shock-absorbing mechanism is arranged in the positioning blind hole, which can prevent the exposure of the shock-absorbing mechanism from affecting the folding performance of the folding frame on the one hand, and improve the protection of the shock-absorbing mechanism on the other hand, making the shock-absorbing mechanism more durable.

[0005] Accordingly, the present invention provides a folding frame, comprising a front frame and a rear frame, wherein the front frame and the rear frame are pivotally connected, the front frame and the rear frame swing relative to each other at corresponding pivot axes, and the posture of the folding frame switches between an unfolded state and a folded state; When the folding frame is in the unfolded state, a latch passes through the guide through hole on the front frame and is inserted into the positioning blind hole on the rear frame. With the tangential direction of the pivot axis as a reference, the inner side wall of the guide through hole and the inner side wall of the positioning blind hole respectively limit the latch in the tangential direction, and the folding frame is maintained in the unfolded state based on the latch. The guide through hole is tightly matched with the latch in the tangential direction, and the positioning blind hole reserves a movable space for the latch to move along the tangential direction. The folding frame further comprises a hidden shock absorbing mechanism, which is used for absorbing the movement of the latch in the tangential direction in the positioning blind hole.

[0006] An optional embodiment further comprises a transmission connecting piece, wherein a central portion of the transmission connecting piece is provided with a latch hole adapted to the latch; In the rear frame, with the tangent direction of the pivot axis as a reference, the positioning blind hole is provided with a first slide groove in the positive direction of the tangent direction, and the positioning blind hole is provided with a second slide groove in the reverse direction of the tangent direction, and the two ends of the transmission connecting piece are respectively slidably fitted in the first slide groove and the second slide groove; When the latch passes through the guide through hole on the front frame and is inserted into the positioning blind hole on the rear frame, the latch is inserted into the latch hole, and the transmission connecting piece is driven by the latch, and the two ends of the transmission connecting piece slide along the first sliding groove and the second sliding groove respectively; The hidden shock absorbing mechanism damps the movement of the latch in the tangential direction based on the transmission connecting plate.

[0007] In an optional embodiment, the first slide groove is connected to a first installation cavity on a side away from the positioning blind hole, and the second slide groove is connected to a second installation cavity on a side away from the positioning blind hole; A first spring is installed in the first installation cavity, one end of the first spring is connected and fixed to the inner cavity wall of the first installation cavity, and the other end of the first spring is connected to a vibrating connection piece fitted in the first slide groove; A second spring is installed in the second installation cavity, one end of the second spring is connected and fixed to the inner cavity wall of the second installation cavity, and the other end of the second spring is connected to the vibrating connecting piece fitted in the second sliding groove.

[0008] In an optional implementation manner, the first installation cavity and the second installation cavity are connected based on a flow channel, and the first installation cavity, the flow channel and the second installation cavity are filled with a damping fluid; The first sliding groove and the second sliding groove are sealed based on the transmission connecting piece.

[0009] In an optional embodiment, the hidden shock absorbing mechanism further includes a damping control component, and the damping control component is used to control the cross-sectional area of ​​the flow channel at a preset cross-section.

[0010] In an optional implementation manner, the minimum value of the flow channel cross-sectional area is zero.

[0011] In an optional implementation manner, the damping control component is a manual valve, and a control end of the manual valve is located on the surface of the rear frame.

[0012] In an optional implementation manner, the damping control component is an electronic valve.

[0013] Correspondingly, the present invention also provides a folding bicycle, comprising the folding frame.

[0014] The present invention provides a folding frame and a folding bicycle, wherein the front frame and the rear frame of the folding frame are connected by a pivot axis, and the positions of the folding frame and the unfolding posture are determined based on the corresponding locking mechanism; the locking mechanism for the front frame and the rear frame is not completely rigid, and a space for the pin to move tangentially along the pivot axis is reserved through a positioning blind hole, thereby providing a structural basis for the implementation of the shock absorbing mechanism; the shock absorbing mechanism adopts a hidden design, and the pin is shock-absorbing in the positioning blind hole, thereby improving the durability of the shock absorbing mechanism, avoiding the position interference problem when the folding frame is folded and unfolded, and having It has good implementation convenience; the position of the pin is adjusted in disguise by the transmission connecting plate to prevent the shock absorbing mechanism from affecting the movement of the pin in the positioning blind hole; the spring is used as the basic shock absorbing structure, and the damping fluid is used as the energy absorbing structure, so that the shock absorbing mechanism obtains a better shock absorbing experience; by adding a damping control component, the damping performance of the whole vehicle can be flexibly adjusted according to the road conditions, and the damping control component can completely cut off the flow channel, so that the front frame and the rear frame are in a rigid connection state, which meets the various needs of users in different riding conditions and has good convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the folding frame of the first embodiment of the present invention.

[0017] Figure 2 The figure is a schematic diagram of the three-dimensional structure of the front frame of the first embodiment of the present invention.

[0018] Figure 3 The figure is a schematic diagram of the three-dimensional structure of the rear frame of the first embodiment of the present invention.

[0019] Figure 4 This is a front view of the folding frame of the first embodiment of the present invention.

[0020] Figure 5 It is a left side view of the folding frame of the first embodiment of the present invention.

[0021] Figure 6 This is a schematic diagram of the cross-sectional structure of a folding frame according to Embodiment 1 of the present invention.

[0022] Figure 7 It is a schematic diagram of a partially enlarged cross-section of the folding frame of the first embodiment of the present invention.

[0023] Figure 8This is a schematic diagram of the three-dimensional structure of the valve screw according to the first embodiment of the present invention.

[0024] Fig. 9 A schematic diagram of the three-dimensional structure of a folding bicycle according to the second embodiment of the present invention DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The folding bicycle mentioned in the present invention, referred to as "folding bicycle" for short, can specifically be a foldable pedal bicycle, an electric bicycle, etc. Embodiment 1

[0027] An embodiment of the present invention provides a folding frame, comprising a front frame and a rear frame, wherein the front frame and the rear frame are pivotally connected, and the front frame and the rear frame swing relative to each other at corresponding pivot shafts 104, and the posture of the folding frame switches between an unfolded state and a folded state. Specifically, the unfolded state refers to the state of the folding frame in normal use, and the folded state refers to the state of the folding frame when it is stored.

[0028] When the folding frame is in the unfolded state, a latch 102 passes through the guide through hole 111 on the front frame and is inserted into the positioning blind hole 207 on the rear frame. With the tangential direction of the pivot axis 104 as a reference, the inner side wall of the guide through hole 111 and the inner side wall of the positioning blind hole 207 respectively limit the latch 102 in the tangential direction, and the folding frame is maintained in the unfolded state based on the latch 102.

[0029] Conventionally, if the aperture of the positioning blind hole 207 is tightly matched with the latch 102, the front frame and the rear frame are in a rigid connection state, and the cooperation between the latch 102 and the positioning blind hole 207 is only used to completely lock the relative posture position of the front frame and the rear frame. In the embodiment of the present invention, the guide through hole 111 is tightly matched with the latch 102 in the tangential direction, and the positioning blind hole 207 reserves a movable space for the latch 102 to move along the tangential direction in the tangential direction; the folding frame also includes a hidden shock-absorbing mechanism, which is used to damp the movement of the latch 102 in the tangential direction in the positioning blind hole 207.

[0030] In the embodiment of the present invention, when the folding frame is in the unfolded state, the front frame and the rear frame are maintained based on the cooperation of the latch 102 and the positioning blind hole 207. The positioning blind hole 207 reserves a space for the movement of the latch 102 in the tangential direction of the pivot shaft 104, that is, the front frame and the rear frame still have a small range of relative swing stroke when they are in the unfolded state, thereby providing a shock-absorbing basis for the setting of the shock-absorbing mechanism; on this basis, the latch 102 is shock-absorbing in the positioning blind hole 207. On the one hand, the positioning blind hole 207 is an inner hole structure, and external pollution is not easy to invade the shock-absorbing mechanism, thereby improving the durability of the shock-absorbing mechanism. On the other hand, the positioning blind hole 207 is a built-in structure of the folding frame, and the setting of the shock-absorbing mechanism will not cause position interference to the folding of the folding frame, so that the shock-absorbing mechanism can be well applied to a variety of folding vehicle models and has good universal performance.

[0031] Figure 1 is a schematic diagram of the three-dimensional structure of a folding frame according to an embodiment of the present invention, Figure 2 is a schematic diagram of the three-dimensional structure of the front frame of an embodiment of the present invention, Figure 3 The figure is a schematic diagram of the three-dimensional structure of the rear frame according to an embodiment of the present invention.

[0032] Specifically, the embodiment of the present invention provides a specific implementation structure of a folding frame for implementation reference. Figures 1 to 3 The folding frame structure shown in the embodiment of the present invention comprises a front frame and a rear frame.

[0033] The front frame 1 includes a front frame body 101 and a front pivoting portion 105. The front frame body 101 is used for installing components such as a front wheel assembly and a seat rod assembly. The front pivoting portion 105 is used to pivot with the rear frame. The pivoting connection member used for pivoting and fixing is also classified into the front frame and is Figure 2 As shown in the figure, a guide through hole 111 is provided on the front pivot portion 105, and a latch 102 is provided in the guide through hole 111.

[0034] The rear frame 2 includes a rear frame body 201 and a rear pivoting portion 206. The rear frame body 201 is mainly used for installing components such as a rear wheel assembly, a flywheel assembly, and a transmission assembly. In the embodiment of the present invention, the rear frame body 201 includes a first wing 202, a second wing 203, a wing connecting member 204, and a wing connecting tube 205. The first wing 202 and the second wing 203 are arranged opposite to each other and connected and fixed based on the wing connecting member 204. The wing connecting tube 205 is used to connect the first wing 202 and the second wing 203 on the one hand, and to install the middle shaft on the other hand; the rear pivoting portion 206 is connected to the rear frame body 201, and the rear pivoting portion 206 is used to cooperate with the front pivoting portion 105 to form a pivoting structure for relative swinging between the front frame and the rear frame; a positioning blind hole 207 is provided on the rear pivoting portion 206 for the insertion of the latch 102. Furthermore, in order to prevent the front frame and the rear frame from being passively unfolded when the folding frame is in the folded state, refer to the accompanying drawings. Figure 7 The partially enlarged schematic diagram shows that a folding blind hole 214 is provided at a relative position of the rear frame. When the folding frame is in a folded state, the latch 102 can be inserted into the folding blind hole 214 to lock the relative posture of the front frame and the rear frame.

[0035] On the basis of this structural frame structure, a hidden shock-absorbing mechanism is provided in the folding blind hole 214 , so as to achieve the purpose of shock-absorbing the movement of the latch 102 in the tangential direction in the positioning blind hole 207 .

[0036] Specifically, since the latch 102 needs to move in the blind positioning hole 207, considering the interference problem of the structure and the durability of the shock absorbing mechanism, in the embodiment of the present invention, a transmission connecting piece 208 is further included, and a latch hole 102 adapted to the latch 102 is provided in the middle of the transmission connecting piece 208; In the rear frame, with the tangential direction of the pivot shaft 104 as a reference, the positioning blind hole 207 is provided with a first slide groove in the positive direction of the tangential direction, and the positioning blind hole 207 is provided with a second slide groove in the reverse direction of the tangential direction, and the two ends of the transmission connecting piece 208 are respectively slidably fitted in the first slide groove and the second slide groove; When the latch 102 passes through the guide through hole 111 on the front frame and is inserted into the positioning blind hole 207 on the rear frame, the latch 102 is inserted into the latch hole 102, and the transmission connecting piece 208 is driven by the latch 102, and the two ends of the transmission connecting piece 208 slide along the first sliding groove and the second sliding groove respectively; The hidden shock absorbing mechanism damps the movement of the latch pin 102 in the tangential direction based on the transmission connecting piece 208 .

[0037] Specifically, refer to Figure 3Schematic diagram of the three-dimensional structure of the rear frame and Figure 7 Schematic diagram of the enlarged cross-section structure of the frame (corresponding to Figure 6 The node 100 in the schematic diagram of the cross-sectional structure of the illustrated frame is a transmission connecting piece 208 that is in a tight fit with the latch 102 in the tangential direction. The movement of the latch 102 in the tangential direction will drive the transmission connecting piece 208 to move. The first pair of transmission connecting pieces 208 performs shock absorption, which is substantially equivalent to performing shock absorption on the latch 102. Therefore, the hidden shock absorption mechanism performs shock absorption on the movement of the latch 102 in the tangential direction based on the transmission connecting piece 208. Since the two ends of the transmission connecting piece 208 are respectively slidably matched on the first slide groove and the second slide groove, and the first slide groove and the second slide groove are located outside the positioning blind hole 207, the implementation purpose of the transmission connecting piece 208 is substantially to avoid the location of the positioning blind hole 207 where the latch 102 is located, so as to provide more space for designing the shock absorption mechanism.

[0038] On this basis, further, the first slide groove is communicated with a first installation cavity on a side away from the positioning blind hole 207, and the second slide groove is communicated with a second installation cavity on a side away from the positioning blind hole 207; A first spring 211 is installed in the first installation cavity, one end of the first spring 211 is connected and fixed to the inner cavity wall of the first installation cavity, and the other end of the first spring 211 is connected to a vibrating connection piece fitted in the first slide groove; A second spring 212 is installed in the second installation cavity, one end of the second spring 212 is connected and fixed to the inner cavity wall of the second installation cavity, and the other end of the second spring 212 is connected to a vibrating connecting piece fitted in the second sliding groove.

[0039] Specifically, the two ends of the transmission connecting piece 208 are connected to the first spring 211 and the second spring 212 respectively. Figure 7Taking the direction shown as a reference, the spring located in the clockwise direction of the latch 102 (the first spring 211 in the embodiment of the present invention) is compressed and provides a reaction force for the latch 102, and the spring located in the counterclockwise direction of the latch 102 (the second spring 212 in the embodiment of the present invention) is stretched and provides a reaction force for the latch 102; based on the selection of the spring, under the normal load range, the latch 102 is located in the middle position of the positioning blind hole 207 (that is, the latch 102 does not contact the hole wall of the positioning blind hole 207 in the tangential direction). When the folding bicycle is bumping during travel, the bumping (i.e., the posture change of the wheels) will be transmitted to the seat cushion through the frame due to the sudden change in force. Since the forces on the front wheel and the rear wheel are not synchronized (the posture change is not synchronized), the front frame and the rear frame will swing relative to each other in the implementation of the non-rigid connection of the embodiment of the present invention, and the relative swing of the two will drive the deformation of the first spring 211 and the second spring 212. According to Hooke's law, the deformation of the first spring 211 and the second spring 212 will absorb the energy of the relative swing and provide a corresponding reaction force, thereby hindering the swing between the front frame and the rear frame, and providing a reaction force that increases with the swing angle for the relative movement between the front frame and the rear frame, thereby avoiding the rigid collision between the front frame and the rear frame, and ensuring that the bump of the wheels will not be completely transmitted to the seat cushion, thereby achieving a good shock absorption effect.

[0040] In actual implementation, the spring plays a role of instantaneous energy absorption. After the folding bicycle leaves the bumpy road section, due to the release of energy in the spring, the spring needs to consume the energy through repeated stretching and compression. The repeated stretching and compression of the spring will cause the seat cushion to have slight ups and downs, and the riding experience is not good. Therefore, further, the first installation cavity and the second installation cavity are connected based on a flow channel 213, and the first installation cavity, the flow channel 213 and the second installation cavity are filled with damping fluid; the first slide groove and the second slide groove are sealed based on the transmission connecting piece 208.

[0041] Specifically, the first mounting cavity and the second mounting cavity are connected based on a flow channel 213. In order to avoid leakage of the damping fluid, the transmission connecting piece 208 needs to maintain the sealing of the first slide groove and the second slide groove; since the transmission connecting piece 208 is a rigid structure, the movement of the transmission connecting piece 208 is complementary to the surplus volume change brought about by the first mounting cavity and the second mounting cavity, and the damping fluid needs to flow from the mounting cavity with reduced surplus volume to the other mounting cavity; the damping fluid generates friction with the side wall of the flow channel 213 during the flow process, thereby consuming the energy of the spring deformation; it can be understood that the spring deformation process also needs to overcome the friction force generated by the damping fluid and the side wall of the flow channel 213. By setting the flow channel 213 and the damping fluid, the energy of the spring can be quickly dissipated in the form of heat energy, thereby reducing unnecessary subsequent bouncing of the spring.

[0042] It should be noted that in the embodiment of the present invention, the flow channel 213 is processed by drilling. On the one hand, drilling can ensure the smoothness of the hole wall, avoid the accumulation of debris, and increase the service life of the flow channel 213; on the other hand, the drilling structure is conducive to the subsequent installation of the damping control component.

[0043] Furthermore, in order to control the damping, the hidden shock absorbing mechanism also includes a damping control component, which is used to control the cross-sectional area of ​​the flow channel 213 at a preset cross-section, and adjust the damping generated by the damping fluid in the entire shock absorbing mechanism by controlling the cross-sectional area of ​​the flow channel 213, thereby controlling the energy absorption speed of the damping fluid.

[0044] Furthermore, during high-intensity riding, the participation of the shock absorbing mechanism will consume the rider's power at the same time. Therefore, in actual implementation, under the control of the damping control component, the minimum value of the cross-sectional area of ​​the flow channel 213 is zero, that is, the connection between the first mounting cavity and the second mounting cavity is disconnected by the damping control component. Under this implementation structure, since the first mounting cavity and the second mounting cavity are respectively filled with damping fluid, the damping fluid is not easily compressed, the pin 102 cannot move in the positioning blind hole 207, the front frame and the rear frame are in a rigid connection state, the shock absorbing mechanism does not participate in the work, and will not consume the rider's power in addition.

[0045] In actual design, the damping control component is a manual valve, the control end of which is located on the surface of the rear frame, and the valve is controlled by manual operation; further, the damping control component is an electronic valve, the mechanical structure of which is completely located inside the frame, and the control structure can control the valve by wireless control, ensuring that the mechanical structure has a relatively high sealing performance. In addition, it should be noted that since electronic valves need to be powered by a power supply, electronic valves are generally used in electric folding bicycles.

[0046] Figure 4 This is a front view of a folding frame according to an embodiment of the present invention. Figure 5 It is a left side view of the folding frame of the embodiment of the present invention, Figure 6 is a schematic cross-sectional structure diagram of a folding frame according to an embodiment of the present invention, Figure 7The folding frame of the embodiment of the present invention is a partially enlarged cross-sectional structural diagram. In summary, the improved structure of the folding frame of the embodiment of the present invention is mainly concentrated in the pivot structure of the front frame and the rear frame and the hidden shock absorbing mechanism. For the pivot structure, the embodiment of the present invention sets the pivot shaft 104 on one side of the center axis hole 209 of the rear frame, and the front pivot part 105 and the rear pivot part 206 are matched through the pivot shaft 104. The guide through hole 111 of the front frame is used for the bolt 102 to pass through, and in order to prevent the bolt 102 from falling out, a through hole step 1 is provided at the outer opening of the guide through hole 111. 10, a circle of latch steps 112 are also provided on the latch 102, and a latch spring 102 is provided between the latch step 112 and the through hole step 110, so that the latch 102 will not fall out of the guide through hole 111; when the folding frame is in the unfolded state, the latch 102 and the positioning blind hole 207 are opposite to each other, and the latch 102 is inserted into the positioning blind hole 207 under the action of the latch spring 102, and is matched in the latch hole 102 in the middle of the transmission connecting piece 208; the transmission connecting piece 208 The two ends of the transmission connecting piece 208 are respectively slidably fitted in the first slide groove and the second slide groove, and the transmission connecting piece 208 will not fall out during the entire movement stroke; the first slide groove and the second slide groove are respectively connected to the first installation cavity and the second installation cavity, and the first spring 211 in the first installation cavity and the second spring 212 in the second installation cavity are respectively connected to the transmission connecting piece 208; a flow channel 213 is arranged between the first installation cavity and the second installation cavity, and the entire cavity is filled with damping fluid. When the transmission connecting piece 208 moves, the damping fluid flows due to the change of the surplus volume of the first installation cavity and the second installation cavity, and the friction between the damping fluid and the wall of the flow channel 213 consumes the impact force transmitted by the transmission connecting piece 208; in the embodiment of the present invention, since the flow channel 213 is machined by drilling, a sealing member is required to seal at the corresponding drilling position; in the embodiment of the present invention, in order to control the cross-sectional area of ​​the flow channel 213 and achieve the effect of damping adjustment, the damping control component used in the embodiment of the present invention is a manual valve.

[0047] Specifically, the manual valve structure machine of the embodiment of the present invention is a valve screw 216 with a special structure. Figure 8 The three-dimensional structure diagram of the valve screw 216 of the embodiment of the present invention is shown. Figure 7As shown in the figure, a screw hole 215 passing through the flow channel 213 is arranged at a preset position of the flow channel 213, and the outer ring of the valve screw 216 is processed with a thread (the thread decorative line is not shown in the figure), wherein a fluid hole 230 is processed in the middle section of the valve screw 216. During actual installation, the head section and the tail section of the valve screw 216 are both threadedly engaged in the screw hole 215, and the middle section of the valve screw 216 is located in the flow channel 213. By rotating the valve screw 216, the opening size of the fluid hole 230 will change, thereby achieving the purpose of controlling the opening size of the cross section of the flow channel 213. It should be noted that the wire diameter of the screw hole 215 needs to be larger than the cross-sectional area of ​​the flow channel 213, and the size and shape of the fluid hole 230 also need to be reasonably designed, so as to ensure that when the two are arranged orthogonally, the fluid hole 230 can be fully opened or fully closed by rotating the valve screw 216. Embodiment 2

[0048] Accordingly, the embodiment of the present invention also provides a folding bicycle, referring to Fig. 9 The three-dimensional structural diagram of the folding bicycle of the embodiment of the present invention is shown. The folding bicycle of the embodiment of the present invention comprises the folding frame described in the first embodiment, the front wheel assembly 3, the handlebar assembly 4, the seat post assembly 5, the middle shaft assembly 8, the rear wheel assembly 6, and the speed change assembly 7, wherein the front wheel assembly, the handlebar assembly and the seat post assembly are installed on the front frame, and the flywheel assembly, the rear wheel assembly and the speed change assembly are installed on the rear frame. Based on the component structure to be installed, the front frame and the rear frame need to be designed accordingly, and the existing technology can be referred to in actual implementation.

[0049] In summary, the present invention provides a folding frame and a folding bicycle, wherein the front frame and the rear frame of the folding frame are connected by a pivot axis, and are positioned in an unfolded posture based on a corresponding locking mechanism; the locking mechanism for the front frame and the rear frame is not completely rigid, and a space for the latch to move tangentially along the pivot axis is reserved through a positioning blind hole, thereby providing a structural basis for the implementation of a shock-absorbing mechanism; the shock-absorbing mechanism adopts a hidden design, and the latch is shock-absorbing in the positioning blind hole, thereby improving the durability of the shock-absorbing mechanism and avoiding position interference problems when the folding frame is folded and unfolded. It has good implementation convenience; the position of the pin is adjusted in disguise by the transmission connecting plate to prevent the shock absorbing mechanism from affecting the movement of the pin in the positioning blind hole; the spring is used as the basic shock absorbing structure, and the damping fluid is used as the energy absorbing structure, so that the shock absorbing mechanism obtains a better shock absorbing experience; by adding a damping control component, the damping performance of the whole vehicle can be flexibly adjusted according to the road conditions, and the damping control component can completely cut off the flow channel, so that the front frame and the rear frame are in a rigid connection state, which meets the various needs of users in different riding conditions and has good convenience of use.

[0050] A folding frame and a folding bicycle provided by an embodiment of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for a person skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation mode and the scope of application. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A folding frame, characterized in that: The foldable frame comprises a front frame and a rear frame, wherein the front frame and the rear frame are pivotally connected, the front frame and the rear frame swing relative to each other at corresponding pivot axes, and the posture of the foldable frame switches between an unfolded state and a folded state; When the folding frame is in the unfolded state, a latch passes through the guide through hole on the front frame and is inserted into the positioning blind hole on the rear frame. With the tangential direction of the pivot axis as a reference, the inner side wall of the guide through hole and the inner side wall of the positioning blind hole respectively limit the latch in the tangential direction, and the folding frame is maintained in the unfolded state based on the latch. The guide through hole is tightly matched with the latch in the tangential direction, and the positioning blind hole reserves a movable space for the latch to move along the tangential direction. The folding frame further comprises a hidden shock absorbing mechanism, which is used for absorbing the movement of the latch in the tangential direction in the positioning blind hole.

2. The folding frame according to claim 1, characterized in that: Also includes a transmission connecting piece, the middle portion of the transmission connecting piece is provided with a latch hole adapted to the latch; In the rear frame, with the tangent direction of the pivot axis as a reference, the positioning blind hole is provided with a first slide groove in the positive direction of the tangent direction, and the positioning blind hole is provided with a second slide groove in the reverse direction of the tangent direction, and the two ends of the transmission connecting piece are respectively slidably fitted in the first slide groove and the second slide groove; When the latch passes through the guide through hole on the front frame and is inserted into the positioning blind hole on the rear frame, the latch is inserted into the latch hole, and the transmission connecting piece is driven by the latch, and the two ends of the transmission connecting piece slide along the first sliding groove and the second sliding groove respectively; The hidden shock absorbing mechanism damps the movement of the latch in the tangential direction based on the transmission connecting plate.

3. The folding frame according to claim 2, characterized in that: The first slide groove is communicated with a first installation cavity on a side away from the positioning blind hole, and the second slide groove is communicated with a second installation cavity on a side away from the positioning blind hole; A first spring is installed in the first installation cavity, one end of the first spring is connected and fixed to the inner cavity wall of the first installation cavity, and the other end of the first spring is connected to a vibrating connection piece fitted in the first slide groove; A second spring is installed in the second installation cavity, one end of the second spring is connected and fixed to the inner cavity wall of the second installation cavity, and the other end of the second spring is connected to the vibrating connecting piece fitted in the second sliding groove.

4. The folding frame according to claim 3, characterized in that: The first installation cavity and the second installation cavity are connected via a flow channel, and the first installation cavity, the flow channel and the second installation cavity are filled with a damping fluid; The first sliding groove and the second sliding groove are sealed based on the transmission connecting piece.

5. The folding frame according to claim 4, characterized in that: The hidden shock absorbing mechanism further includes a damping control component, and the damping control component is used to control the cross-sectional area of ​​the flow channel at a preset cross-section.

6. The folding frame according to claim 5, characterized in that: The minimum value of the flow channel cross-sectional area is zero.

7. The folding frame according to claim 5, characterized in that: The damping control component is a manual valve, and the control end of the manual valve is located on the surface of the rear frame.

8. The folding frame according to claim 5, characterized in that: The damping control component is an electronic valve.

9. A folding bicycle, characterized in that: A folding frame comprising the folding frame according to any one of claims 1 to 8.

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