A folding bicycle frame and folding bicycle

Abstract

The application provides a folding frame and a folding bicycle, which can ensure the portability of the folding bicycle, and the folding frame is kept in an unfolded posture through the cooperation of a bolt and a positioning blind hole; the positioning blind hole is designed in a corresponding direction, and the front frame and the rear frame are reserved with a small relative movement space; a hidden damping mechanism is arranged in the positioning blind hole, which can avoid the influence of the exposed damping mechanism on the folding performance of the folding frame, and improve the protection of the damping mechanism, so that the damping mechanism is more durable.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicles, in particular to a folding frame and a folding bicycle. BACKGROUND

[0002] In the process of riding a two-wheeled vehicle, the contact positions of the human body and the vehicle include the handlebars and the seat cushion of the vehicle. In order to improve the riding experience of the user and avoid the ups and downs of the road being directly transmitted to the handlebars and the seat cushion, a corresponding damping mechanism is generally added to the force transmission path between the wheels and the handlebars and the wheels and the seat cushion when the two-wheeled vehicle is designed.

[0003] For a two-wheeled vehicle in a folding form, the damping mechanism needs to be designed in combination with the attitude change of the vehicle before and after folding to avoid structural interference, and the durability of the damping mechanism also needs to be considered. SUMMARY

[0004] Under the premise of ensuring the portability of the folding vehicle, the present application provides a folding frame and a folding bicycle. The folding frame realizes the maintenance of the unfolded attitude through the cooperation of the latch and the positioning blind hole. The size of the positioning blind hole in the corresponding direction reserves a small range of relative movement space for the front frame and the rear frame. On this basis, a hidden damping mechanism is arranged in the positioning blind hole. On the one hand, the exposure of the damping mechanism can avoid affecting the folding performance of the folding frame. On the other hand, the protection of the damping mechanism can make the damping mechanism more durable.

[0005] Correspondingly, the present application provides a folding frame, which comprises a front frame and a rear frame. The front frame and the rear frame are pivotally connected. The front frame and the rear frame swing relative to each other at the corresponding pivot shaft. The attitude of the folding frame is switched between an unfolded state and a folded state.

[0006] When the folding frame is in the unfolded state, a latch passes through a guide through hole located on the front frame and is inserted into a positioning blind hole located on the rear frame. With the tangential direction of the pivot shaft as the reference, the inner side wall of the guide through hole and the inner side wall of the positioning blind hole limit the latch in the tangential direction, respectively. The folding frame is maintained in the unfolded state based on the latch.

[0007] The guide through hole is tightly fitted with the latch in the tangential direction. The positioning blind hole reserves a movement space for the latch to move along the tangential direction.

[0008] The folding frame further comprises a hidden damping mechanism. The hidden damping mechanism is used to dampen the movement of the latch in the tangential direction in the positioning blind hole.

[0009] Optionally, the embodiment further comprises a transmission connecting piece, a pin hole is arranged in the middle of the transmission connecting piece and is matched with the pin;

[0010] In the rear frame, with the tangential direction of the pivot shaft as the reference, the positioning blind hole is provided with a first sliding slot in the positive direction of the tangential direction and a second sliding slot in the negative direction of the tangential direction, and the two ends of the transmission connecting piece are respectively slidably matched in the first sliding slot and the second sliding slot;

[0011] When the pin passes through the guide through hole arranged on the front frame and is inserted into the positioning blind hole arranged on the rear frame, the pin is inserted into the pin hole, the transmission connecting piece is driven by the pin, and the two ends of the transmission connecting piece slide along the first sliding slot and the second sliding slot respectively;

[0012] The hidden damping mechanism dampens the movement of the pin in the tangential direction based on the transmission connecting piece.

[0013] Optionally, the first sliding slot is communicated with a first mounting cavity on the side away from the positioning blind hole, and the second sliding slot is communicated with a second mounting cavity on the side away from the positioning blind hole;

[0014] A first spring is arranged in the first mounting cavity, one end of the first spring is fixedly connected with the inner cavity wall of the first mounting cavity, and the other end of the first spring is connected with a jitter connecting piece matched in the first sliding slot;

[0015] A second spring is arranged in the second mounting cavity, one end of the second spring is fixedly connected with the inner cavity wall of the second mounting cavity, and the other end of the second spring is connected with a jitter connecting piece matched in the second sliding slot.

[0016] Optionally, the first mounting cavity and the second mounting cavity are communicated based on a flow channel, the first mounting cavity, the flow channel and the second mounting cavity are filled with damping fluid;

[0017] The first sliding slot and the second sliding slot are sealed based on the transmission connecting piece.

[0018] Optionally, the hidden damping mechanism further comprises a damping control assembly for controlling the flow channel cross-sectional area of the flow channel at a preset cross section.

[0019] Optionally, the minimum value of the flow channel cross-sectional area is zero.

[0020] Optionally, the damping control assembly is a manual valve, and the control end of the manual valve is located on the surface of the rear frame.

[0021] Optionally, the damping control assembly is an electronic valve.

[0022] Correspondingly, the application also provides a folding bicycle comprising the folding frame.

[0023] The application provides a folding frame and a folding bicycle, the front frame and the rear frame of the folding frame are connected through a pivot shaft, and the position of the unfolded posture is based on a corresponding locking mechanism; the locking of the front frame and the rear frame by the locking mechanism is not completely rigid, and a space for the bolt to move along the tangent of the pivot shaft is reserved through a positioning blind hole, thereby providing a structural basis for the implementation of the damping mechanism; the damping mechanism adopts a hidden design, and the bolt is damped in the positioning blind hole, thereby improving the durability of the damping mechanism, avoiding the position interference problem of the folding frame during folding and unfolding, and having good implementation convenience; the position of the bolt is adjusted through a transmission connecting piece, thereby avoiding the influence of the damping mechanism on the movement of the bolt in the positioning blind hole; the spring is used as the basic damping structure, and the damping fluid is used as the energy absorption structure, so that the damping mechanism obtains better damping experience; through the additional damping control assembly, the damping performance of the whole vehicle can be flexibly adjusted according to the road conditions, and through the damping control assembly, the flow channel can be completely cut off, so that the front frame and the rear frame are in a rigid connection state, various needs of users in different riding states are met, and good use convenience is obtained. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0025] Figure 1 It is a three-dimensional structure schematic diagram of the folding frame of the embodiment one of the application.

[0026] Figure 2 It is a three-dimensional structure schematic diagram of the front frame of the embodiment one of the application.

[0027] Figure 3 It is a three-dimensional structure schematic diagram of the rear frame of the embodiment one of the application.

[0028] Figure 4 It is a front view of the folding frame of the embodiment one of the application.

[0029] Figure 5 It is a left view of the folding frame of the embodiment one of the application.

[0030] Figure 6 It is a sectional structure schematic diagram of the folding frame of the embodiment one of the application.

[0031] Figure 7 Figure 2 is a partial enlarged view of the cross section of the folding bicycle frame according to the first embodiment of the present application.

[0032] Figure 8 Figure 3 is a three-dimensional view of the valve screw according to the first embodiment of the present application.

[0033] Figure 9 Figure 4 is a three-dimensional view of the folding bicycle according to the second embodiment of the present application. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0035] The folding bicycle mentioned in the present application, referred to as a folding bicycle, can specifically be a foldable pedal bicycle, an electric bicycle, etc. Embodiment 1

[0036] The folding bicycle frame according to the embodiment of the present application comprises a front frame and a rear frame, 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 shafts 104, and the posture of the folding bicycle frame switches between an unfolded state and a folded state. Specifically, the unfolded state refers to the state of the folding bicycle frame when it is used normally, and the folded state refers to the state of the folding bicycle frame when it is stored.

[0037] When the folding bicycle frame is in the unfolded state, a pin 102 passes through a guide through hole 111 on the front frame and is inserted into a positioning blind hole 207 on the rear frame. With the tangential direction of the pivot shaft 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 limit the pin 102 in the tangential direction, respectively, and the folding bicycle frame is kept in the unfolded state based on the pin 102.

[0038] 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 dampen the movement of the latch 102 in the tangential direction in the positioning blind hole 207.

[0039] In an 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 between the latch 102 and the positioning blind hole 207. The positioning blind hole 207 reserves 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 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. The setting of the shock-absorbing mechanism will not cause position interference with 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.

[0040] Figure 1 This is a schematic diagram of the three-dimensional structure of the folding frame according to an embodiment of the present invention. Figure 2 Schematic diagram of the three-dimensional structure of the front frame of an embodiment of the present invention, Figure 3 Schematic diagram of the three-dimensional structure of the rear frame according to an embodiment of the present invention.

[0041] 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 includes a front frame and a rear frame.

[0042] The front frame 1 includes a front frame body 101 and a front pivot portion 105. The front frame body 101 is used for installing components such as the front wheel assembly and the seat post assembly. The front pivot portion 105 is used to pivot with the rear frame. The pivot connection member used for pivotal fixing is also classified into the front frame and is located in the front frame. Figure 2 The front pivot portion 105 is provided with a guide through hole 111, and a latch 102 is provided in the guide through hole 111.

[0043] The rear frame 2 comprises a rear frame body 201 and a rear pivot joint 206, the rear frame body 201 is mainly used for mounting components such as rear wheel assembly, flywheel assembly, gear shifting assembly, etc., in the embodiment of the application, the rear frame body 201 comprises a first wing plate 202, a second wing plate 203, a wing plate connecting piece 204, and a wing plate connecting cylinder 205, the first wing plate 202 and the second wing plate 203 are oppositely arranged and connected and fixed based on the wing plate connecting piece 204, the wing plate connecting cylinder 205 is used for connecting the first wing plate 202 and the second wing plate 203 on one hand, and is used for mounting a middle shaft on the other hand; the rear pivot joint 206 is connected with the rear frame body 201, the rear pivot joint 206 is used for cooperating with the front pivot joint 105 to form a pivot joint structure, so as to enable the front frame and the rear frame to relatively swing; a positioning blind hole 207 is arranged on the rear pivot joint 206 to enable the pin 102 to be inserted into the positioning blind hole 207. Further, in order to prevent the front frame and the rear frame from being passively unfolded when the folding frame is in the folded state, referring to the accompanying drawings Figure 7 A schematic partial enlarged view is shown, a folding blind hole 214 is arranged at the opposite position of the rear frame, when the folding frame is in the folded state, the pin 102 can be inserted into and cooperated with the folding blind hole 214 to lock the relative posture of the front frame and the rear frame.

[0044] On the basis of the above-mentioned frame structure, a hidden damping mechanism is arranged in the folding blind hole 214, so as to achieve the purpose of damping the movement of the pin 102 in the tangential direction in the positioning blind hole 207.

[0045] Specifically, since the pin 102 needs to move in the positioning blind hole 207, considering the interference problem of the structure and the durability problem of the damping mechanism, in the embodiment of the application, a transmission connecting piece 208 is further arranged, a pin 102 hole adapted to the pin 102 is arranged in the middle part of the transmission connecting piece 208.

[0046] In the rear frame, with the tangential direction of the pivot shaft 104 as the reference, the positioning blind hole 207 is provided with a first sliding groove in the positive direction of the tangential direction, and is provided with a second sliding groove in the reverse direction of the tangential direction, and the two ends of the transmission connecting piece 208 are respectively slidably cooperated in the first sliding groove and the second sliding groove.

[0047] When the pin 102 passes through the guide through hole 111 arranged on the front frame and is inserted into the positioning blind hole 207 arranged on the rear frame, the pin 102 is inserted into the pin 102 hole, the transmission connecting piece 208 is driven by the pin 102, and the two ends of the transmission connecting piece 208 slide along the first sliding groove and the second sliding groove respectively.

[0048] The hidden damping mechanism dampens the movement of the pin 102 in the tangential direction based on the transmission connecting piece 208.

[0049] Specifically, referring to Figure 3 The schematic three-dimensional structure of the rear frame and Figure 7 The enlarged schematic view of the schematic cross-sectional structure of the frame (corresponding to Figure 6 The node 100 in the schematic view of the cross-sectional structure of the frame), the transmission connecting piece 208 is in a close-fitting relationship with the plug-in pin 102 in the tangential direction, and the movement of the plug-in pin 102 in the tangential direction will drive the movement of the transmission connecting piece 208. The first pair of transmission connecting pieces 208 are substantially equivalent to the shock absorption of the plug-in pin 102, so that the hidden shock absorption mechanism absorbs the movement of the plug-in pin 102 in the tangential direction based on the transmission connecting piece 208. Since the two ends of the transmission connecting piece 208 are respectively slidingly fitted in the first sliding groove and the second sliding groove, the first sliding groove and the second sliding groove are located outside the positioning blind hole 207, and the purpose of the implementation of the transmission connecting piece 208 is to avoid the position of the plug-in pin 102 in the positioning blind hole 207. To provide more space for the design of the shock absorption mechanism.

[0050] On this basis, further, the first sliding groove is in communication with a first mounting cavity on the side away from the positioning blind hole 207, and the second sliding groove is in communication with a second mounting cavity on the side away from the positioning blind hole 207.

[0051] A first spring 211 is installed in the first mounting cavity, one end of the first spring 211 is connected and fixed with the inner cavity wall of the first mounting cavity, and the other end of the first spring 211 is connected with the vibration connecting piece fitted in the first sliding groove.

[0052] A second spring 212 is installed in the second mounting cavity, one end of the second spring 212 is connected and fixed with the inner cavity wall of the second mounting cavity, and the other end of the second spring 212 is connected with the vibration connecting piece fitted in the second sliding groove.

[0053] Specifically, the two ends of the transmission connecting piece 208 are respectively connected with the first spring 211 and the second spring 212. Basically, within the normal load range, the first spring 211 and the second spring 212 are in a state of elastic deformation, and the transmission connecting piece 208 is in a state of elastic deformation. Figure 7The shown direction is the reference, the spring in the clockwise direction of the latch 102 (the first spring 211 in the embodiment of the application) is compressed and provides a reaction force for the latch 102, and the spring in the counterclockwise direction of the latch 102 (the second spring 212 in the embodiment of the application) is stretched and provides a reaction force for the latch 102; based on the selection of the spring, under 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 in the tangential direction of the positioning blind hole 207). When the folding vehicle is running, due to the sudden change of force, the bump (i.e. the posture transformation of the wheel) will be transmitted to the seat cushion through the frame, and due to the different forces of the front wheel and the rear wheel (the posture transformation is not synchronized), the front frame and the rear frame will produce relative swing in the non-rigid connection of the embodiment of the application, 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, which will hinder the swing between the front frame and the rear frame, and provide a reaction force that increases with the increase of the swing angle for the relative movement between the front frame and the rear frame, that is, it avoids the rigid collision between the front frame and the rear frame, and also ensures that the bump of the wheel will not be completely transmitted to the seat cushion, which has a good damping effect.

[0054] In actual implementation, the spring plays a role in instant energy absorption, and after the folding vehicle drives away from the bumping road section, due to the release of energy in the spring, the spring needs to consume the energy therein through repeated stretching and compression, and the repeated stretching and compression of the spring will cause the seat cushion to have slight undulations, which will affect the riding experience. Therefore, further, the first mounting cavity and the second mounting cavity are communicated based on a flow channel 213, and the first mounting cavity, the flow channel 213 and the second mounting cavity are filled with damping fluid; the first sliding groove and the second sliding groove are sealed based on the transmission connecting piece 208.

[0055] Specifically, the first mounting cavity and the second mounting cavity are communicated based on a flow channel 213, in order to avoid leakage of the damping fluid, the transmission connecting piece 208 needs to keep the first sliding groove and the second sliding groove sealed; since the transmission connecting piece 208 is a rigid structure, the movement of the transmission connecting piece 208 is complementary to the change of the excess volume of the first mounting cavity and the second mounting cavity, and the damping fluid needs to flow from the mounting cavity with reduced excess volume to the other mounting cavity; the damping fluid generates friction with the side wall of the flow channel 213 in the process of flowing, so as to consume the energy of the deformation of the spring; it can be understood that the process of spring deformation also needs to overcome the friction between 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, reducing unnecessary bouncing of the spring.

[0056] It should be noted that in the embodiment of the present application, the machining of the flow channel 213 adopts a drilling machining mode, on the one hand, drilling can ensure the smoothness of the hole wall, avoid the accumulation of debris, and improve the service life of the flow channel 213; on the other hand, the drilling structure is conducive to the installation of the subsequent damping control assembly.

[0057] Further, in order to control the damping, the hidden damping mechanism further comprises a damping control assembly for controlling the cross-sectional area of the flow channel 213 at the preset cross section, by controlling the cross-sectional area of the flow channel 213 to adjust the size of the damping generated by the damping fluid in the entire damping mechanism, thereby controlling the energy absorption speed of the damping fluid.

[0058] Further, in high-intensity cycling, the participation of the damping mechanism will consume the power of the cyclist at the same time, therefore, in actual implementation, under the control of the damping control assembly, 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 through the damping control assembly, in this implementation structure, due to the damping fluid filled in the first mounting cavity and the second mounting cavity respectively, the damping fluid is not easy to be compressed, the bolt 102 cannot move in the positioning blind hole 207, the front frame and the rear frame are in a rigid connection state, the damping mechanism does not participate in work, and the power of the cyclist is not consumed additionally.

[0059] In actual design, the damping control assembly is a manual valve, the control end of the manual valve is located on the surface of the rear frame, and the valve is controlled in a manual operation mode; further, the damping control assembly is an electronic valve, the mechanical structure part of the electronic valve is completely located inside the frame, and the control structure part can control the valve in a wireless control mode, so that the mechanical structure part has relatively high sealing performance. In addition, it should be noted that since the electronic valve needs to be powered by a power supply, the electronic valve is generally applied to an electric folding bicycle.

[0060] Figure 4 is a front view of the folding frame of the embodiment of the present application, Figure 5 is a left view of the folding frame of the embodiment of the present application, Figure 6 is a cross-sectional structure schematic view of the folding frame of the embodiment of the present application, Figure 7The application discloses a folding frame structure. The folding frame structure comprises a front frame, a rear frame and a hidden damping mechanism. The front frame is connected with the rear frame through a pivot connection structure. The hidden damping mechanism is arranged between the front frame and the rear frame. The pivot connection structure comprises a pivot shaft, a front pivot connection part and a rear pivot connection part. The hidden damping mechanism comprises a transmission connecting plate, a first sliding slot, a second sliding slot, a first installation cavity, a second installation cavity, a flow channel, a first spring, a second spring, a first guide through hole, a pin, a pin spring, a pin step, a locating blind hole, a pin hole in the middle of the transmission connecting plate, and a damping fluid. The front frame is provided with a guide through hole. The rear frame is provided with a middle shaft hole. The pivot shaft is arranged on one side of the middle shaft hole of the rear frame. The front pivot connection part and the rear pivot connection part are matched through the pivot shaft. The guide through hole of the front frame is used for allowing the pin to pass through. In order to avoid the pin from being pulled out, the outer side opening of the guide through hole is provided with a through hole step. The pin is also provided with a pin step. The pin spring is arranged between the pin step and the through hole step, so that the pin cannot be pulled out of the guide through hole. When the folding frame is in an unfolded state, the pin and the locating blind hole are opposite to each other. The pin is inserted into the locating blind hole under the action of the pin spring and is matched in the pin hole in the middle of the transmission connecting plate. The two ends of the transmission connecting plate are slidably matched in the first sliding slot and the second sliding slot respectively. The transmission connecting plate cannot be pulled out in the whole movement stroke. The first sliding slot and the second sliding slot are communicated with the first installation cavity and the second installation cavity respectively. The first spring in the first installation cavity and the second spring in the second installation cavity are connected with the transmission connecting plate respectively. The flow channel is arranged between the first installation cavity and the second installation cavity. The whole cavity is filled with damping fluid. When the transmission connecting plate moves, the damping fluid flows due to the change of the surplus volume of the first installation cavity and the second installation cavity. The friction between the damping fluid and the wall of the flow channel can consume the impact force transmitted by the transmission connecting plate. In the embodiment of the application, the flow channel is processed by means of machining drilling, so that a sealing element is needed to seal the corresponding drilling position. In the embodiment of the application, in order to control the sectional area of the flow channel and achieve the effect of damping adjustment, the damping control assembly adopted by the embodiment of the application is a manual valve.

[0061] Specifically, the manual valve structure machine of the embodiment of the application is a valve screw 216 with a special structure, Figure 8 A three-dimensional structure structure schematic view of the valve screw 216 of the embodiment of the application is shown. Specifically, with reference to the accompanying drawings Figure 7As shown in the figure, a screw hole 215 is provided at a predetermined position in the flow channel 213, passing through the flow channel 213. The outer ring of the valve screw 216 is threaded (the thread decorative line is not shown in the figure). A fluid hole 230 is formed in the middle section of the valve screw 216. During actual installation, the head and tail sections of the valve screw 216 are threadedly engaged in the screw hole 215, with the middle section of the valve screw 216 located in the flow channel 213. By rotating the valve screw 216, the opening size of the fluid hole 230 changes, thereby achieving the purpose of controlling the cross-sectional opening size 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 to ensure that when the two are arranged orthogonally, the fluid hole 230 can be fully opened or closed by rotating the valve screw 216. Example 2

[0062] Accordingly, the embodiment of the present invention also provides a folding bicycle, referring to Figure 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 includes the folding frame, front wheel assembly 3, handlebar assembly 4, seat post assembly 5, middle shaft assembly 8, rear wheel group 6, and speed change assembly 7 described in Example 1, wherein the front wheel assembly, handlebar assembly and seat post assembly are installed on the front frame, and the flywheel assembly, rear wheel assembly and speed change assembly are installed on the rear frame. Based on the structure of the components to be installed, the front frame and the rear frame need to be structurally designed accordingly, and the actual implementation can refer to the existing technology.

[0063] 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 shaft, 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 space is reserved for the pin to move tangentially along the pivot shaft 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 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 entire vehicle can be flexibly adjusted according to 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, meeting the various needs of users in different riding conditions, and having good use convenience.

[0064] The above has carried out the detailed introduction to the folding frame and the folding car provided by the embodiment of the application, the principle and the implementation mode of the application are described by applying the specific examples in this paper, the above embodiment is only used for helping understanding the method of the application and its core idea; at the same time, for the general technical personnel in the art, according to the idea of the application, the specific implementation mode and the application range will have the change, and the above is described, the content of the specification should not be understood as the limitation of the application.

Claims

1. A folding frame, characterized in that, The folding frame comprises a front frame and a rear frame, 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 a posture of the folding frame is switched between an unfolded state and a folded state; When the folding frame is in the unfolded state, a pin is inserted into a positioning blind hole in the rear frame through a guide through hole in the front frame, with respect to a tangential direction of the pivot axes, inner side walls of the guide through hole and the positioning blind hole limit the pin in the tangential direction respectively, and the folding frame is kept in the unfolded state based on the pin; The guide through hole is tightly fitted with the pin in the tangential direction, and the positioning blind hole leaves a movement space for the pin to move in the tangential direction; The folding frame further comprises a hidden damping mechanism for damping the movement of the pin in the tangential direction in the positioning blind hole; The folding frame further comprises a transmission connecting piece, a pin hole is arranged in a middle part of the transmission connecting piece and is matched with the pin; In the rear frame, with respect to the tangential direction of the pivot axes, a first sliding groove is arranged in a forward direction of the tangential direction of the positioning blind hole, and a second sliding groove is arranged in a reverse direction of the tangential direction of the positioning blind hole, and two ends of the transmission connecting piece are respectively slidably matched in the first sliding groove and the second sliding groove; When the pin is inserted into the pin hole through the guide through hole in the front frame and the positioning blind hole in the rear frame, the transmission connecting piece is driven based on the pin, and two ends of the transmission connecting piece slide along the first sliding groove and the second sliding groove respectively; The hidden damping mechanism dampens the movement of the pin in the tangential direction based on the transmission connecting piece.

2. The folding frame of claim 1, wherein, The first sliding groove is communicated with a first installation cavity on a side away from the positioning blind hole, and the second sliding 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 fixedly connected with an inner cavity wall of the first installation cavity, and the other end of the first spring is connected with a tremor connecting piece matched in the first sliding groove; A second spring is installed in the second installation cavity, one end of the second spring is fixedly connected with an inner cavity wall of the second installation cavity, and the other end of the second spring is connected with a tremor connecting piece matched in the second sliding groove.

3. The folding frame of claim 2, wherein, The first installation cavity and the second installation cavity are communicated based on a flow channel, and the first installation cavity, the flow channel and the second installation cavity are filled with damping fluid; The first sliding groove and the second sliding groove are sealed based on the transmission connecting piece.

4. The folding frame of claim 3, wherein, The hidden damping mechanism further comprises a damping control assembly for controlling a flow channel cross-sectional area of the flow channel at a preset cross section.

5. The folding frame of claim 4, wherein, The minimum value of the flow channel cross-sectional area is zero.

6. The folding frame of claim 4, wherein, The damping control assembly is a manual valve, and a control end of the manual valve is located on a surface of the rear frame.

7. The folding frame of claim 4, wherein, The damping control assembly is an electronic valve.

8. A folding bicycle, characterized by The folding frame comprises the folding frame according to any one of claims 1 to 7.

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