Vehicle rear clamping mechanism and support

Abstract

The present utility model discloses a clamping mechanism and a vehicle rear support, the present solution improves the composition of the transmission mechanism, the ends of said three connecting rods are pivotally connected at one point, the end of said connecting rod I and said handle above are pivotally connected, during the turning of said handle, said connecting rod II synchronously drives the movement of said movable clamping legs, so that it cooperates with said fixed clamping legs to form the gripping or loosening action, the driving of said connecting rod III promotes the improvement of the transmission stability, this solution has a simplified structure whose assembly is easy and the operation is simple. Figure to be published with the abstract: Figure 1

Description

Title of the invention: Vehicle rear clamping mechanism and support Technical field

[0001] The present utility model relates to the technical field of vehicle mechanisms, more specifically to a clamping mechanism and a rear vehicle support. State of the prior art

[0002] The vehicle rear rack for sports enthusiasts is a necessary mechanism, the common rear rack such as the bicycle rack, can place the bicycle for sports traffic on the bicycle rack, generally, a clamping mechanism is mounted on the towing rack, the clamping mechanism is generally a structure with movable clamping legs and fixed clamping legs are installed in the seat body, which, through the gripping movement formed by the displacement of the clamping legs relative to the fixed clamping legs, holds the ball head at the rear end of the vehicle body. For the displacement of the movable clamping legs, for example the forward displacement of the bolts, the operation is time-consuming and laborious, or the displacement is driven by a complex transmission mechanism, which causes trouble in molding and forming, as well as other defects.Therefore, it is necessary to research and develop a clamping mechanism with simplified structure and simple operation. Statement of the invention

[0003] In order to solve at least one of the above-mentioned technical defects, the present utility model provides the following technical solution:

[0004] The present application document discloses a clamping mechanism, comprising a seat body, a handle, a transmission mechanism, said handle is pivotally connected to said seat body, said fixed clamping legs and said movable clamping legs are provided in the cavity of said seat body, and an opening is provided in the cavity wall of said seat body corresponding to said fixed clamping legs and said movable clamping legs, said handle and said movable clamping legs are connected through a transmission mechanism to drive said movable clamping legs and said fixed clamping legs to cooperate, said movable clamping legs are located between said transmission mechanism and said fixed clamping legs, one end of said movable clamping legs is pivotally connected to the cavity wall of said seat body,said transmission mechanism comprises at least one connecting rod I, one connecting rod II, one connecting rod III, the ends of said connecting rod I, connecting rod II, connecting rod III are pivotally connected at a point, and, the other end of said connecting rod I located above said pivoting connection point is pivotally connected to said handle located above, the other end of said connecting rod II is pivotally connected to said movable clamping legs and the other end of said connecting rod III is pivotally connected to said cavity wall of said seat body, said connecting rod I is driven to move during the process of turning said handle, and the movable clamping legs are synchronously driven to swing.

[0005] The present solution improves the composition of the transmission mechanism, the ends of said three connecting rods are pivotally connected to one point, the end of said connecting rod I which is above is pivotally connected with said handle above, during the turning of said handle, the position of said connecting rod I changes, so that said common pivotal connection point of said three connecting rods moves synchronously, said connecting rod II synchronously drives the movement of said movable clamping lugs, the ends of the movable clamping lugs are pivotally connected to the seat body, with the driving of said connecting rod II, said clamping lugs move towards or away from said fixed clamping lugs, cooperating to form the gripping or loosening action, the driving of said connecting rod III promotes the improvement of the transmission stability,This solution has a simplified structure which is easy to assemble and simple to operate.

[0006] For the turning planes of said handle, all connecting rods and said movable clamping legs, for example, they are all in the horizontal plane or the longitudinal plane, preferably, said handle, said connecting rod I, said connecting rod II, said connecting rod III and said movable clamping legs rotate in the longitudinal direction, and it is convenient to lift and fold them down.

[0007] Furthermore, said connecting rod II and said connecting rod III are located on both sides of said connecting rod I, which ensures good stability of the transmission and facilitates arrangement and assembly.

[0008] For the pivoting connection position of said connecting rod I and the pivoting connection position of said handle, it is possible to choose that the pivoting connection position of said connecting rod I is between the rear end of said handle and the pivoting connection position of said handle, or that the pivoting connection position of said handle is between the rear end of said handle and the pivoting connection position of said connecting rod I, according to the requirements, preferably: said handle is pivotally connected to said seat body near the front end and is pivotally connected to the end of said connecting rod I at its front end, the tops of said movable clamping tabs are pivotally connected to the wall of the cavity of said seat body and the central position of said clamping tabs movable clamping is pivotally connected to the end of said connecting rod II, and the above structural composition is convenient for arrangement and assembly.

[0009] In order to improve grip stability, it is possible to add a locking mechanism to said handle to lock it with the seat body in the clamping state, as follows:

[0010] Solution I: said handle is provided with a first locking mechanism, said first locking mechanism comprises a hook I, a press handle I, said press handle I and said hook I are pivotally connected at the bottom of said handle, an elastic member I for return is provided between said handle and said hook I, said press handle I is connected to said hook I, when said handle is rotated until said movable clamping legs and said fixed clamping legs are in gripping action, said elastic member I is pushed so that said hook I catches on said groove I provided on said seat body to limit said handle from rotating backward, said press handle I rotates synchronously so that the hook end of said hook I detaches from said groove I.

[0011] By adding the first locking mechanism, when said handle is rotated until said movable clamping legs and said fixed clamping legs form a gripping of the ball head and so on, a force is applied to said press handle to cause said hook to catch on said groove on said seat body to limit said handle from rotating back, so that the stability of the gripping is improved.

[0012] For the position of said hook I, such as horizontal placement, longitudinal placement, etc., preferably: the top of said seat body is pivotally connected to said handle, the cavity wall of said seat body below said handle is provided with said groove I which cooperates with said hook, the opening of said hook I is oriented to the side and is pivotally connected to said handle with said hook arms, during the process in which said handle is rotated until said movable clamping legs and said fixed clamping legs are in gripping action, the curved surface of the bottom end of said hook I is abutted against the top of the cavity wall of said seat body where said groove I is located, under said action of the curved surface,said hook I is rotated and the wall of the cavity of said seat body where said groove I is located applies a force to said hook I, so that said elastic member I is compressed synchronously, when said hook I is moved to the position of said groove I, said elastic member I in the compressed state pushes said hook to hook with said groove I, said press handle I is connected to the bottom surface of said handle pivotally at the position, central, said press handle I and said hook I all rotate in the longitudinal plane, a boss I is provided on the surface of said hook arms facing said press handle I, said boss I is located in the path of movement of the front end of said press handle I.

[0013] Said handle is installed at the top of said seat body, the bottom surface of said handle is equipped with hooks can facilitate the arrangement, said elastic member is equipped to facilitate the automatic hooking of said hooks to said groove during the turning of said handle, so that during the process of turning said handle, said hook automatically hooks to the groove, the opening of said hook is oriented upwards, this facilitates the hooking of said hook to said groove in order to limit the turning backwards, said hook cooperates with said handle to press through said boss on said hook arm, this facilitates the arrangement, assembly and forming.

[0014] For the configuration of the movement path of said boss I which is located at the front end of said press handle I, for example said boss I is connected directly with said press handle I, preferably, for example, a slot is provided at the front end of said press handle I, the end portion of said boss I is located in said slot, a space is previously provided in said slot for the movement of said boss I, which ensures good stability.

[0015] Or both are independent of each other, for example said boss I is located on the turning path of the front end of said press handle I, when said press handle I rotates so that the front end is abutted against said boss I in order to push it to move, so that said hook I rotates.

[0016] Solution II: said handle is provided with a first locking mechanism, said first locking mechanism comprises a press handle II and a hook II, said press handle II is provided in the longitudinal direction in an elastically telescopic manner at the top of said handle, said hook II is pivotally connected at the bottom of said handle, an elastic element II for return is provided between said hook II and said handle, said hook II is located in the path of movement of said press handle II, when said handle is rotated until said movable clamping legs and said fixed clamping legs are in gripping action, said elastic element II is pushed so that said hook II hooks onto said groove II provided on said seat body to limit said handle from rotating backward,a force is applied to said press handle II to push said hook II to detach from said groove II in order to unlock said handle.

[0017] For the concrete installation of said handle and said hook II, preferably: the top of said seat body is pivotally connected to said handle, the cavity wall of said seat body below said handle is provided with said groove II which cooperates with said hook, the opening of said hook II is oriented to the side and is pivotally connected to said handle with said hook arms, during the process in which said handle is rotated until said movable clamping legs and said fixed clamping legs are in gripping action, the curved surface of the bottom end of said hook II is abutted against the top of the cavity wall of said seat body where said groove II is located, under said action of the curved surface, said hook II is rotated and the cavity wall of said seat body where said groove II is located applies a force to said hook II, so that said elastic element II is compressed synchronously,when said hook II is moved to the position of said groove II, said elastic member II in the compressed state pushes said hook II to hook with said groove II, said hook II rotates in the longitudinal plane, a boss II is provided on the surface of said hook arms, said boss II is in the path of movement of said press handle II, during the turning of said handle, said hook II hooks with said groove II on said seat body, when it requires unlocking, for example, said press handle II is pressed to push said boss II into said hook II, so that said hook II detaches from said groove II. ,

[0018] For the configuration of said boss II on the path of movement of said press handle II, such as direct connection or independent connection, preferably independent connection, for example to predetermine the position of said boss II, when said hook II hooks onto said groove II, the end of said boss II is on the path of downward movement of said press handle II, it is sufficient to press said press handle II to push said boss II to move in order to achieve the detachment of said hook II from said groove II.

[0019] For the pivoting connection between the other end of said connecting rod III and said seat body, such that they are fixed at a point and rotate around this point, or form an oval hole in said seat body, so that said connecting rod III can slide relative to said seat body and synchronously allow said connecting rod III to rotate relative to said seat body, preferably: said connecting rod III is provided with a pivot at its rear end and the end of said pivot is located in an oval hole formed on the wall of the cavity of said seat body. Said connecting rod III is pivotally connected to said seat body by said pivot, the existence of said oval hole can allow said connecting rod III to slide relative to said seat body in a synchronized manner, this solution facilitates the selection of the sizes and positions of said connecting rod II and said connecting rod I.

[0020] Furthermore, said seat body is provided with a second locking mechanism, said second locking mechanism comprises an upper column, the rear end of said connecting rod III is connected to said upper column at the position of said seat body in a telescopic manner, the direction of the extension of said oval hole is the same as that of the movement of said upper column, when said handle is rotated until said movable clamping legs and said fixed clamping legs form a ball head grip and so on, said connecting rod III and said connecting rod II are between said upper column and said movable clamping legs, said upper column is moved so that it abuts against said connecting rod III through surface contact to limit the movement of said connecting rod III.

[0021] In the present solution, said second locking mechanism is added, it is possible to use said second locking mechanism independently of said first locking mechanism, by limiting the movement of said connecting rod III to exert an influence on the position of said connecting rod II, and synchronously change the position of said movable clamping legs, it is possible to make adjustments according to the size of said ball head under gripping, the surface contact synchronously limits the turning of said connecting rod III. Said upper column allows flexible locking of said movable clamping legs to adapt to a wide range of sizes and categories of ball heads.

[0022] For the telescopic method of said upper column, for example by the clearance-free adjustment, said upper column can remain at the different positions by the friction force, or by an added peripheral locking mechanism, for example the clips and so on to make said upper column remain at a predetermined position, preferably: said upper column is connected by threaded connection on said seat body, said upper column remains at a desired position by threaded connection, the use is more flexible and convenient.

[0023] The second aspect of the present application relates to a vehicle comprising said clamping mechanism described above.

[0024] For example, said seat body of said clamping mechanism is installed at the front end of the cross beam or beam frame of the chassis body of said rear support, this is a common installation position, but of course it can be installed in other positions according to demand.

[0025] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0026] 1. The present utility model simplifies the structure of the clamping mechanism and is Easy to use, it is suitable to apply in vehicle rear rack and other mechanism.

[0027] Brief description of the drawings In order to illustrate more clearly the technical solutions in the achievements of the present utility model, the following will briefly introduce the accompanying figures to be used in the description of the embodiments, and it is obvious that the accompanying figures in the following description are only some of the embodiments of the present utility model, and for persons with ordinary skills in the field, they can obtain other accompanying figures according to the accompanying figures on the assumption that they do not carry out creative work.

[0028] [Fig.l] is a diagram of the overall structure of said vehicle rear support in embodiment 1;

[0029] [Fig.2] is a diagram of the overall structure of said clamping mechanism;

[0030] [Fig.3] is a diagram of the structure of [Fig.2] with the seat body removed;

[0031] [Fig.4] is a diagram of the structure of [Fig.2] in section;

[0032] [Fig.5] is a diagram of the structure of said hook I;

[0033] [Fig.6] is a diagram of the structure of said first locking mechanism in another embodiment;

[0034] The attached figures are labeled as follows:

[0035] 1. frame body; 2. clamping mechanism; 201. seat body; 202. leg fixed clamp; 203. movable clamping leg; 204. handle; 205. connecting rod I; 206. connecting rod II; 207. connecting rod III; 208. pivot II; 209. pivot I; 210. pivot III; 211. hook I; 212. press handle I; 213. Pivot IV; 214. pivot VIII; 215. pivot V; 216. pivot VI; 217. upper column; 218. oval hole; 219. pivot VII; 220. press handle II; 221. hook II; 222. elastic element I; 223. elastic element II; 224. screw bushing; 2011. groove I; 2012. inlet; 2013. groove II; 2110. hook arm; 2111. boss I; 2112. hook end; 2113. fixing block; 2114. opening; 2121. slot; 2211. IL bump

[0036] Detailed description of particular embodiments

[0037] The utility model is described in more detail below with reference to the accompanying figures and specific embodiments.

[0038] Embodiment 1

[0039] As shown in [Fig.l], the vehicle rear rack in this embodiment comprises a frame 1 and a clamping mechanism 2 mounted on the beam at the front end of said frame 1, and said frame 1 may adopt a common bicycle rack structure configuration.

[0040] For the clamping mechanism 2, as illustrated in Figures 2, 3 and 5, said clamping mechanism 2 comprises a seat body 201, a handle 204 and a transmission mechanism, said seat body 201 adopts a rectangular groove shape and the two opposite sides of which are docked and fixed to the beam of said frame 1, said handle 204 is pivotally connected at the opening to the top of said seat body 201 by a pivot V 215 at a position adjacent to the front end of said handle 204, and said handle 204 rotates in the longitudinal plane up and down.

[0041] Said fixed clamping legs 202 and said movable clamping legs 203 are mounted oppositely at the inner end position of said cavity body of said seat body 201, said fixed clamping legs 202 are integrally fixed with the cavity wall of said seat body 201, the upper ends of said movable clamping legs 203 are pivotally connected to the interior of the cavity of said seat body 201 by said pivot VII 219, said movable clamping legs 203 rotate in the longitudinal plane, and an opening is formed at the cavity wall of said seat body 201 between said fixed clamping legs 202 and said movable clamping legs 203 to form said inlet 2012 for assembly of the ball head, said inlet 2012 is located on the lower surface of the cavity wall of said seat body 201,an arc groove is formed at the position corresponding to the opposite surfaces of said fixed clamping legs 202 and said movable clamping legs 203 to facilitate gripping of the ball head.

[0042] Said handle 204 and said movable clamping legs 203 are connected by a transmission mechanism for driving said movable clamping legs 203 to cooperate with said fixed clamping legs 202, for example, to perform actions such as gripping and loosening. Said movable clamping legs 203 are located between the transmission mechanism and said fixed clamping legs 202, and said transmission mechanism comprises a connecting rod I 205, a connecting rod II 206, and a connecting rod III 207, the ends of said connecting rod I 205, said connecting rod II 206, and said connecting rod III 207 are pivotally connected at one point by a pivot I 209,and the other end of said connecting rod I 205 located above said pivoting connection point is pivotally connected to the front end of said handle 204 located above said connecting rod I by said pivot III 210. Said connecting rod II 206 and said connecting rod III 207 are located at the two sides of said connecting rod I 205, as shown in Figures 3 and 4, the other end of said connecting rod II 206 on the right side is pivotally connected to the central position of said movable clamping legs 203 by said pivot VI 216, and the other end of said connecting rod III 207 on the left side is pivotally connected to the cavity wall of said seat body 201 by said pivot II 208 to form the pivoting connection, and said connecting rod I 205, said connecting rod II 206, and said connecting rod III 207 all rotate in the longitudinal plane, preferably said pivot I 209, said pivot VI 216, said pivot II 208, said pivot I 209, said pivot III 210,said pivot V 215 are parallel, which contributes to improving the stability of the operation, said handle 204 is turned up and down, synchronously pulling the movement of said connecting rod I 205 and synchronously causing the oscillation of said clamping legs, movable 203 relative to said fixed clamping legs 202, during the oscillation, said movable clamping legs 203 form the actions such as gripping, loosening and others with said fixed clamping legs 202.

[0043] For the pivotal connection between the rear end of said connecting rod III 207 and said seat body 201, such that they are fixed at a point and rotate around this point, or form said oval hole 218 in said seat body 201, so that said connecting rod III 207 can slide relative to said seat body 201 and synchronously allow said connecting rod III 207 to rotate relative to said seat body 201, for example, said connecting rod III 207 is provided with said pivot II 208 at its rear end and the other end of said pivot II 208 is located in said oval hole 218 formed on the cavity wall of said seat body 201.Said connecting rod III 207 is pivotally connected to said seat body 201 by means of said pivot II 208, the existence of said oval hole 218 can allow said connecting rod III 207 to slide relative to said seat body 201 in a synchronized manner, which facilitates the selection of the sizes and positions of said connecting rod II 206 and said connecting rod I 205.

[0044] In order to improve gripping stability, a first locking mechanism is added in this embodiment for locking said handle 204 with said seat body 201 in the gripping state, as follows: as shown in Figures 3, 4 and 5, said handle 204 is provided with a first locking mechanism, said first locking mechanism comprises said hook 1211 and said press handle I 212, said press handle I 212 and said hook 1211 are all pivotally connected at the bottom of said handle 204, wherein a groove cavity is formed corresponding to the bottom of said handle 204, said hook I 211 is pivotally connected inside the groove cavity, concretely, said hook 1211 comprises said hook arm 2110 and said hook end 2112, the opening of which said hook end 2114 of said hook 1211 is oriented to the side,said groove I 2011 is formed at the cavity wall of said seat body 201 to which said opening of said hook end 2114 of said hook 1211 below said handle 204, said hook arms 2110 of said hook 1211 and the position behind the center point of turning of said handle 204 form a pivotal connection by said pivot VIII 214, said boss 12111 is formed on the surface of said hook arms 2110 on the same side of said opening of said hook end 2114, said boss 12111 is between said opening of said hook end 2114 and the center point of turning of said hook arms 2110, a notch is formed correspondingly on the cavity wall of said seat body 201 where said groove I 2011 is located for moving said boss 12111. Said block of attachment 2113 is molded on the other side of said hook arms 2110 opposite the position where said boss 12111 is located, , and said elastic member I 222 may be a spring, with one end portion of said spring fixed to said fixing block 2113 and the other end portion fixed to the wall of the groove cavity of said handle 204, so that said hook 1211 is reset by means of the return spring.

[0045] As shown in Figures 4 and 5, said press handle I 212 is mounted at the bottom position of said handle 204 towards which said boss 12111 is oriented, said press handle I 212 rotates in the longitudinal plane, and the central position of said press handle I 212 is pivotally connected to the corresponding position at the bottom of said handle 204 by means of said pivot IV 213, and said press handle I 212 rotates in the longitudinal plane.For the structure of the movement path of said bump 12111 at the end of said press handle I 212, as shown in Figures 3 and 4, said press handle I 212 and said bump I 2111 are docked by means of an insertion method, said slot 2121 is formed at the position of the front end of said press handle I 212, and the end of said bump 12111 is inserted into said slot 2121, it is noted that the front end is moved up and down by lifting or folding the rear end of said press handle I 212 in the present embodiment, and during the process of the movement, said bump 12111 performs actions such as turning and relative sliding in said slot 2121, and it is necessary to reserve a space in said slot 2121 for the movement of said bump 1 2111. .

[0046] During the process of turning said handle 204 until said movable clamping legs 203 and said fixed clamping legs 202 are in gripping action, the curved surface formed at the bottom portion of said hook end 2112 of said hook 1211 is abutted against the top surface of the cavity wall of said seat body where said groove I 2011 is located, the spring is compressed by turning said hook 1211, when said handle continues to turn downward, said hook end 2112 of said hook 1211 is abutted against the cavity wall where the groove is located and moves along the cavity wall to the position of the groove I 2011, under the action of said spring, said hook end 2112 is caught in said groove I 2011 to form a hook connection, at this time, turning back upward of said handle 204 is limited,during the process of turning down said handle 204 in the state shown in [Fig.4], said movable clamping legs 203 swing toward said fixed clamping legs 202 to form a gripping action, to realize gripping of the ball head and so on located in the middle of the two. When it is necessary to unlock, it is necessary to lift said rear end of said press handle 1212 upwards, which corresponds to the downward movement of said rear end of said press handle 1212, and press down so as to, synchronized on said boss 12111 to rotate said hook I 211, so that said hook end 2112 detaches from said groove I 2011 to form the unlocking action, and at that time, said handle 204 must be lifted upwards so that said movable clamping tabs 203 move away from said fixed clamping tabs 202 to form the detaching action.

[0047] In another embodiment, said first locking mechanism as illustrated in [Fig.6] can also be used, said first locking mechanism comprises said press handle II 220 and said hook II 221, the structure of said hook II 221 and that of said hook 1211 are generally the same, also comprising said hook arms 2110, said hook end 2112, said boss II 2211, said fixing block 2113 and other structures, and the bottom curved surface of said hook end 2112 cooperates with the wall of the cavity where said groove II 2013 is located, the method of installation inside said handle 204 is also generally the same as that of said hook 1211, for example by said elastic element II 223, i.e. said spring, mounted through said fixing block 2113 and the wall of the cavity of said handle 204 or so direct,said hook arms 2110 are pivotally connected to said handle 204 through said pivot VIII 214, said groove II 2013 is formed at the wall of the cavity of said seat body 201 to which said opening of said hook end 2114 of said hook II 221 below said handle 204, said opening of said hook end 2114 of said hook II 221 is oriented to the side to cooperate with said groove II 2013. ,

[0048] In this embodiment, said press handle II 220 is mounted at the top of said handle 204 in the longitudinal direction in an elastically telescopic manner, for the elastically telescopic embodiment, it is common that a spring is placed on said press handle II 220 in a columnar shape, and the bottom end of said spring is connected to the cavity wall of the groove longitudinally formed at the top of said handle 204, and said spring is compressed by pressing said press handle II 220 downward, and is reset by the upward return of said press handle II 220 after removing the external force, said boss II 2211 in said hook II 221 extends to below said bottom end of said handle II 220, during the downward movement of said press handle II 220, said boss II 2211 is urged to move.

[0049] During the process of turning said handle 204 until said movable clamping legs 203 and said fixed clamping legs 202 are in gripping action, the action of said hook II 221 is generally the same as that of said hook 1211, for example, the curved surface of the bottom of said hook end of said hook II 221 is abutted against the surface of said upper end of said seat body 201 where said groove II 2013 is located, under said action of the curved surface, said hook II 221 is rotated, said spring is compressed, during the process that said handle 204 continues to rotate downward, said hook II 221 moves downward along the wall of the cavity where said groove II 2013 is located, elastically holding said elastic member II 223 compressed. When said hook II 221 moves to the position of said groove II 2013, said elastic member II 223 in the compressed state pushes said hook II 221 to hook onto said groove II 2013.When it is necessary to unlock, said press handle II 220 must be pressed so that the bottom end of said press handle II 220 is abutted on and pushes said boss II 2211 to move, then said hook II 221 rotates in the longitudinal plane, so that said hook II 221 and said groove II 2013 provided on said seat body 201 detach, at which time it is sufficient to lift upwards said handle 204. .

[0050] When in use, it is possible to select any one of the above first locking mechanisms individually, and at the same time, these two first locking mechanisms can also be applied simultaneously to the same handle 204, said hook 1211 and said hook II 221 can be installed side by side at intervals, and the installation positions of said press handle I 212 and said press handle II 220 have no influence, the protection of double locking can be realized.

[0051] Furthermore, in order to accommodate the gripping of ball heads of more diverse sizes, it is possible to add a second locking mechanism on said seat body 201, said second locking mechanism can be used independently of said first locking mechanism, or said first locking mechanism and said second locking mechanism can be mounted on the same clamping mechanism 2, as illustrated in Figures 3 and 4.

[0052] As shown in Figures 3 and 4, the application of said second locking mechanism is based on the sliding connection between the rear end of said connecting rod III 207 and said seat body 201, that is, said pivot II 208 is fixed to the rear end of said connecting rod III 207 and one of the ends of said pivots II 208 is located in said oval hole 218 formed in the wall of the cavity of said seat body 201. Said pivot II 208 allows said connecting rod III 207 to be pivotally connected to said seat body 201, and the existence of said oval hole 218 allows said connecting rod III 207 to slide synchronously with respect to said seat body 201.

[0053] In this embodiment, said second locking mechanism comprises said upper column 217, the rear end of said connecting rod III 207 is connected to said upper column 217 at the position of said corresponding seat body 201 in a telescopic manner, for example, a through hole is formed at the wall of the cavity of said seat body 201 where said groove I 2011 is located, the screw socket 224 is installed at said through hole, and said upper column 217 may be a bolt, said bolt threadedly meshes with said screw socket 224, and the direction of extension of said oval hole 218 is the same as that of the displacement of said upper column 217.When said handle 204 rotates until said movable clamping legs 203 and said fixed clamping legs 202 are in gripping action, said connecting rod III 207 and said connecting rod II 206 are located between said upper column 217 and said movable clamping legs 203, and the surface of said upper column 217 opposite the rear end of said connecting rod II 206 is a flat surface, said upper column 217 is rotated to move forward, said upper column 217 is abutted against the rear end of said connecting rod III 207, in this embodiment, the turning of said connecting rod III 207 and its movement backward along said oval hole 218 are limited, the gripping action of said movable clamping legs 203 and said fixed clamping legs 202 is locked.Depending on the size of the ball head under gripping, it is sufficient to move said upper column 217 forwards and backwards to limit the action of said connecting rod III 207. When unlocking, it is sufficient to move said upper 217 forwards or backwards in the same way.

[0054] As shown in Figures 3 and 4, when said first locking mechanism and said second locking mechanism are used at the same time, for a ball head whose size is predetermined, said handle 204 can be locked by said first locking mechanism so that the gripping action is fixed, when the size of the ball head exceeds the predetermined size, said second locking mechanism can be used directly to lock the gripping action.

[0055] The above are only preferred embodiments of the present utility model, the scope of protection of the present utility model is not limited to the above embodiments, any technical solution under the idea of ​​the present utility model is within the scope of protection of the present utility model. It should be emphasized that, for ordinary technical personnel in the technical field, subject to not deviating from the principle of the utility model, a number of improvements and embellishments should also be considered within the scope of protection of the present utility model.

Claims

Claims

1. A clamping mechanism, comprising a seat body (201), a handle (204), a transmission mechanism, said handle (204) is pivotally connected to said seat body (201), fixed clamping legs (202) and movable clamping legs (203) are provided in a cavity of said seat body (201), and an opening (2114) is provided in a wall of the cavity of said seat body (201) corresponding to said fixed clamping legs (202) and said movable clamping legs (203), said handle (204) and said movable clamping legs (203) are connected through a transmission mechanism for driving said movable clamping legs (203) and said fixed clamping legs (202) to cooperate, characterized in that, said movable clamping legs (203) are between said transmission mechanism and said fixed clamping legs (202),one of the ends of said movable clamping legs (203) is pivotally connected to the cavity wall of said seat body (201), said transmission mechanism comprises at least one connecting rod I (205), one connecting rod II (206), one connecting rod III (207), ends of said connecting rod I (205), connecting rod II (206), connecting rod III (207) are pivotally connected to a point, and the other end of said connecting rod I (205) located above said pivoting connection point is pivotally connected to said handle (204) located above, the other end of said connecting rod II (206) is pivotally connected to said movable clamping legs (203) and the other end of said connecting rod III (207) is pivotally connected to said cavity wall of said seat body (201), said connecting rod I (205) is driven to move during the process of turning said handle (204),and the movable clamping legs (203) are synchronously driven to swing.,

2. A clamping mechanism according to claim 1, characterized in that: said handle (204), said connecting rod I (205), said connecting rod II (206), said connecting rod III (207) and said movable clamping legs (203) all rotate in the longitudinal plane; or, said connecting rod II (206) and said connecting rod III (207) are located at both sides of said connecting rod I (205).

3. A clamping mechanism according to claim 1, characterized in that: said handle (204) is pivotally connected to said seat body (201) near a front end and is pivotally connected to

4. said other end of said connecting rod I (205) at its front end, tops of said movable clamping legs (203) are pivotally connected to the wall of the cavity of said seat body (201) and a central position of said movable clamping legs (203) is pivotally connected to said other end of said connecting rod II (206). Clamping mechanism according to claim 1, characterized in that: said handle (204) is provided with a first locking mechanism, said first locking mechanism comprises a hook I (211), a press handle I (212), said press handle I (212) and said hook I (211) are pivotally connected at a bottom of said handle (204), an elastic element I (222) for return is provided between said handle (204) and said hook I (211), said press handle I (212) is connected to said hook I (211), a groove I (2011) is provided on said seat body (201),when said handle (204) is rotated until said movable clamping legs (203) and said fixed clamping legs (202) are in gripping action, said elastic member I (222) is pushed so that said hook I (211) hooks onto said groove I (2011) provided on said seat body (201) to limit said handle (204) from rotating backward, said press handle I (212) rotates synchronously so that a hook end of said hook I (211) detaches from said groove I (2011);, or, said handle (204) is provided with a first locking mechanism, said first locking mechanism comprises a press handle II (220) and a hook II (221), said press handle II (220) is provided in the longitudinal direction in an elastically telescopic manner at a top of said handle (204), said hook II (221) is pivotally connected at a bottom of said handle (204), an elastic element II (223) for return is provided between said hook II (221) and said handle (204), said hook II (221) is located in the path of movement of said press handle II (220), a groove II (2013) is provided on said seat body (201), when said handle (204) is rotated until said movable clamping legs (203) and said fixed clamping legs (202) are in gripping action,said elastic member II (223) is pushed so that said hook II (221) hooks onto said groove II (2013) provided on said seat body (201) to limit said handle (204) from rotating backward, a force is applied to said handle for pressing,

5. II (220) to push said hook II (221) to detach from said groove II (2013) in order to unlock said handle (204). A clamping mechanism according to claim 4, characterized in that: a top of said seat body (201) is pivotally connected to said handle (204), the cavity wall of said seat body (201) below said handle (204) is provided with said groove I (2011) which cooperates with said hook I (211), an opening of said hook I (211) is oriented to the side and is pivotally connected to said handle (204) with hook arms (2110), during the process in which said handle (204) is rotated until said movable clamping legs (203) and said fixed clamping legs (202) are in gripping action, a curved surface of a bottom end of said hook I (211) is abutted against a top of the cavity wall of said seat body (201) where said groove I (2011) is located, under said action of the surface curved,said hook I (211) is rotated and the cavity wall of said seat body where said groove I (2011) is located applies a force to said hook I (211), so that said elastic member I (222) is compressed synchronously, when said hook I (211) is moved to the position of said groove I (2011), said elastic member I (222) in the compressed state pushes said hook I (211) to hook with said groove I (2011), said press handle I (212) is connected to a bottom surface of said handle (204) in a pivotable manner at a central position, said press handle I (212) and said hook I (211) all rotate in the longitudinal plane, a boss I (2111) is provided on a surface of said hook arms (2110) facing said press handle I (212), said boss I (2111) is located on a path of movement of a front end of said press handle I (212);, or, the top of said seat body (201) is pivotally connected to said handle (204), the cavity wall of said seat body (201) below said handle (204) is provided with said groove II (2013) which cooperates with said hook II (221), an opening of said hook II (221) is oriented to the side and is pivotally connected to said handle (204) with said hook arms (2110), during the process in which said handle (204) is rotated until said movable clamping legs (203) and said fixed clamping legs (202) are in gripping action, a curved surface of one end of bottom of said hook II (221) is abutted against a top of the cavity wall of said seat body (201) where said groove II (2013) is located, under said action of the curved surface, said hook II (221) is rotated and the cavity wall of said seat body where said groove II (2013) is located applies a force to said hook II (221), so that said elastic member II (223) is compressed synchronously, when said hook II (221) is moved to the position of said groove II (2013), said elastic member II (223) in the compressed state pushes said hook II (221) to hook with said groove II (2013), said hook II (221) rotates in the longitudinal plane, a boss II (2211) is provided on the surface of said hook arms (2110), said boss II (2211) is on a path of the movement of said handle for press II (220).

6. A clamping mechanism according to claim 5, characterized in that: a slot (2121) is provided at the front end of said press handle I (212), an end portion of said boss I (2111) is located in said slot (2121), a space is previously provided in said slot (2121) for the movement of said boss I (2111).

7. A clamping mechanism according to any one of claims 1 to 6, characterized in that: said connecting rod III (207) is provided with a pivot at a rear end and one end of said pivot is located in an oval hole (218) formed on the wall of the cavity of said seat body (201).

8. A clamping mechanism according to claim 7, characterized in that: said seat body (201) is provided with a second locking mechanism, said second locking mechanism comprises an upper column (217), a rear end of said connecting rod III (207) is connected to said upper column (217) at the position of said seat body (201) in a telescopic manner, when said handle (204) is rotated until said movable clamping legs (203) and said fixed clamping legs (202) are in gripping action, said connecting rod III (207) and said connecting rod II (206) are between said upper column (217) and said movable clamping legs (203), said upper column (217) is moved so that it abuts against said connecting rod III (207) through surface contact to limit the movement of said connecting rod III (207).

9. A clamping mechanism according to claim 8, characterized in that: said upper column (217) is connected by threaded connection to said seat body (201).

10. Vehicle rear support, characterized in that it comprises said clamping mechanism according to any one of claims 1 to 9.