Ball clamp fixing mechanism for automobile tail support

Abstract

The utility model relates to the technical field of automobile tail supports, in particular to a ball clamp fixing mechanism for an automobile tail support, which comprises a ball clamp casting front cover, a ball clamp casting rear cover and a first connecting component, the ball clamp casting front cover is detachably connected with the ball clamp casting rear cover, and the first connecting component is detachably connected with the ball clamp casting rear cover. The first connecting assembly is used for being connected with an automobile, the ball clamp casting front cover is provided with a first groove, the ball clamp casting rear cover is provided with a second groove, after the ball clamp casting front cover and the ball clamp casting rear cover are closed, the first groove and the second groove define a mounting groove, and at least part of the first connecting assembly is located in the mounting groove. A second connecting assembly is arranged on the ball clamp casting rear cover and comprises a lock cylinder and a connecting piece, the lock cylinder is partially arranged in the connecting piece, and the second connecting assembly is unlocked or locked by adjusting the relative position of the lock cylinder in the connecting piece.

Description

Technical Field

[0001] The present disclosure relates to the technical field of automobile rear brackets, and in particular to a ball clamp fixing mechanism for an automobile rear bracket. Background Art

[0002] As vehicle mobility and flexibility increase, the requirements for automobile transportation and load capacity are also getting higher and higher. In addition to the typical roof racks, there are also many rear racks for transporting bicycles. The rear rack (bicycle rack) is a device installed at the rear of the car for transporting bicycles. It solves the problem of the inconvenience of carrying bicycles with the car due to the large size of the bicycle and is favored by cycling enthusiasts. The common way to fix the bicycle at the rear of the car to the car is to fix the connecting device on the bicycle at the rear of the car to the ball head connector at the rear of the car.

[0003] The patent with patent application number 202010724674.1 discloses a ball clamp fixing seat and a ball clamp fixing device for a bicycle rack at the rear of a car, including: a ball clamp fixing front seat and a ball clamp fixing rear seat, one end of the two are hinged to each other, and the other end is respectively provided with a first locking groove and a second locking groove; the ball clamp fixing front seat is provided with a first groove on the side close to the ball clamp fixing rear seat, and the bottom of the ball clamp fixing front seat has a first opening connected to the first groove; the ball clamp fixing rear seat is provided with a second groove on the side close to the ball clamp fixing front seat, and the bottom of the ball clamp fixing rear seat has a second opening connected to the second groove; the first groove and the second groove together form a mounting hole for fixing the ball head of the car; a connecting protrusion extends upward from the ball clamp fixing front seat or the ball clamp fixing rear seat, and a first through hole is provided on the connecting protrusion. The ball clamp fixing seat of the bicycle rack at the rear of the car needs tools to connect with the bicycle rack or remove the bicycle rack. If the user forgets to bring the corresponding tools outdoors, it is difficult to connect the bicycle rack to the car or remove it from the rear of the car, which brings certain inconvenience to the user. Utility Model Content

[0004] In view of the deficiencies and existing problems in the prior art, the present invention provides a ball clamp fixing mechanism for a rear bracket of an automobile, which can realize the connection and disassembly of the bracket very conveniently and has high connection stability.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a ball clamp fixing mechanism for a rear bracket of an automobile, comprising a front cover of a ball clamp casting, a rear cover of a ball clamp casting and a first connecting component, wherein the front cover of the ball clamp casting and the rear cover of the ball clamp casting are detachably connected, and the first connecting component is used to connect the automobile, the front cover of the ball clamp casting is provided with a first groove, and the rear cover of the ball clamp casting is provided with a second groove, after the front cover of the ball clamp casting and the rear cover of the ball clamp casting are covered, the first groove and the second groove enclose a mounting groove, the first connecting component is at least partially located in the mounting groove, and the rear cover of the ball clamp casting is provided with a second connecting component, the second connecting component comprises a lock core and a connecting piece, the lock core is partially provided in the connecting piece, and the second connecting component is unlocked or locked by adjusting the relative position of the lock core in the connecting piece.

[0006] As a preferred embodiment, the connecting part includes a connecting sleeve and a connecting column, the connecting column and the back cover of the ball clamp casting are integrally formed, the connecting sleeve is arranged on the outside of the connecting column, the connecting column is a hollow structure, the lock core is partially arranged in the hollow structure, the lock core is movably connected to the connecting column, when the second connecting component is in a locked state, the connecting sleeve cannot be removed from the connecting column, and by adjusting the relative position of the lock core in the connecting column, the connecting sleeve can be removed from the connecting column and the second connecting component is unlocked.

[0007] As a preferred embodiment, the first end of the front cover of the ball clamp casting is hinged to the first end of the rear cover of the ball clamp casting, and the second end of the front cover of the ball clamp casting is detachably connected to the second end of the rear cover of the ball clamp casting; the second connecting component includes a locked state and an unlocked state. When the second connecting component is in the locked state, the second connecting component is unlocked by adjusting the relative position of the lock core in the connecting member. After the second connecting component is unlocked, it is used to connect the bracket.

[0008] As a preferred embodiment, at least one limiting protrusion is provided on the connecting column, and at least one limiting recess is provided on the connecting sleeve, and the limiting protrusion cooperates with the limiting recess to limit the circumferential position of the connecting sleeve, so as to prevent the connecting sleeve from rotating in the circumferential direction and affecting the stability of the second connecting assembly.

[0009] As a preferred embodiment, the end of the limiting protrusion close to the rear cover of the ball clamp casting is the tail, and the end away from the rear cover of the ball clamp casting is the head. The limiting recess is provided with an opening, and the end of the limiting recess away from the opening is the bottom. After the connecting sleeve is connected to the connecting column, a gap is provided between the head of the limiting protrusion and the bottom of the limiting recess.

[0010] As a preferred embodiment, a limiting rod and two first through holes are provided on the connecting column, the two first through holes are arranged opposite to each other, the limiting rod passes through the two first through holes, and two "L"-shaped limiting holes are provided on the lock core, the two "L"-shaped limiting holes are arranged opposite to each other, and the limiting rod passes through the two "L"-shaped limiting holes. When the second connecting component is in a locked state, the lock core is rotated and pressed to unlock the second connecting component.

[0011] As a preferred embodiment, the limiting rod is a bolt, and a receiving groove is provided on the connecting column, wherein a first through hole is provided at the bottom of the receiving groove, and the head of the bolt is located in the receiving groove.

[0012] As a preferred embodiment, a handle is provided at one end of the lock core away from the rear cover of the ball clamp casting, and the handle is provided to facilitate operation of the lock core.

[0013] As a preferred embodiment, at least two second through holes are arranged on the connecting column, at least two second through holes are arranged at the same height, at least two second through holes are evenly distributed along the circumferential direction of the connecting column, the second through hole is located below the first through hole, and a steel ball is arranged in the second through hole, and the steel ball can move in the second through hole.

[0014] As a preferred embodiment, a first annular recess is provided on the inner circumferential wall of the connecting sleeve, the position of the first annular recess corresponds to the second through hole, and a second annular recess is provided on the outer circumferential wall of the lock core; when the second connecting component is in a locked state, the second annular recess is located above the second through hole, and the steel ball part is located in the first annular recess; when the second connecting component is in an unlocked state, the position of the second annular recess corresponds to the second through hole, and the steel ball part is located in the second annular recess.

[0015] As a preferred embodiment, the diameter of the second through hole on the outer peripheral wall of the connecting column is d1, the diameter of the second through hole on the inner peripheral wall of the connecting column is d2, the diameter of the steel ball is d0, d1 is less than d0, and d2 is greater than or equal to d0. d1 is less than d0 so that the steel ball cannot completely escape from the second through hole, thereby preventing the steel ball from slipping out of the second through hole; d2 is greater than or equal to d0 so that a part of the steel ball can smoothly enter the second annular recess to unlock the second connecting component.

[0016] As a preferred embodiment, the depth of the second annular recess is h, the radius of the steel ball is r, and h is less than or equal to r. h is less than or equal to r so that when the second connecting component is in the unlocked state, only a portion of the steel ball enters the second annular recess.

[0017] As a preferred embodiment, the hollow structure includes a first channel and a second channel which are interconnected, the diameter of the first channel is larger than that of the second channel, the lock core is slidably connected in the first channel, an elastic member is arranged under the lock core, the elastic member is used for resetting the lock core, one end of the elastic member is located in the second channel, and the other end of the elastic member abuts against the lock core.

[0018] As a preferred embodiment, a limiting portion is provided at the bottom of the lock core, and the limiting portion is used to limit the elastic member.

[0019] As a preferred embodiment, the elastic member is a spring, the limiting portion is an annular limiting protrusion, one end of the spring is located in the second channel, and the other end of the spring is located on the inner side of the annular limiting protrusion.

[0020] Compared with existing products, since a second connecting component is provided on the rear cover of the ball clamp casting, the second connecting component includes a lock core and a connecting piece, and the lock core portion is provided in the connecting piece. The second connecting component is unlocked or locked by adjusting the relative position of the lock core in the connecting piece. After the second connecting component is unlocked, it is used to connect the bracket. In this way, the bracket can be connected to the car or removed from the rear of the car without the aid of tools, providing greater convenience for users. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present application will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present application. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0022] Figure 1 This is one of the structural schematic diagrams of a ball clamp fixing mechanism for a rear bracket of an automobile disclosed in the present invention;

[0023] Figure 2 This disclosure Figure 1 A partial enlarged view of the middle A;

[0024] Figure 3 This is the second structural schematic diagram of a ball clamp fixing mechanism for a rear bracket of an automobile disclosed in the present invention;

[0025] Figure 4 is a schematic structural diagram of the rear cover of the ball clamp casting disclosed in the present invention;

[0026] Figure 5 is a schematic structural diagram of the front cover of the ball clamp casting disclosed in the present invention;

[0027] Figure 6This is the third structural schematic diagram of a ball clamp fixing mechanism for a rear bracket of an automobile disclosed in the present invention;

[0028] Figure 7 It is a cross-sectional view of a ball clamp fixing mechanism for a rear bracket of an automobile disclosed in the present invention;

[0029] Figure 8 This disclosure Figure 7 A partial enlarged view of point B in the middle;

[0030] Fig. 9 is a schematic diagram of the structure of the connecting sleeve disclosed in the present invention;

[0031] Fig.10 is a cross-sectional view of the connecting sleeve disclosed herein;

[0032] Fig.11 It is one of the structural schematic diagrams of the lock core disclosed in the present invention;

[0033] Fig.12 This is the second structural schematic diagram of the lock core disclosed in the present invention;

[0034] Fig.13 This is the fourth structural schematic diagram of a ball clamp fixing mechanism for a rear bracket of an automobile disclosed in the present invention;

[0035] Fig.14 This is the fifth structural schematic diagram of a ball clamp fixing mechanism of a rear bracket of an automobile disclosed in the present invention;

[0036] Fig.15 It is a structural schematic diagram of the connection between the connecting sleeve and the bracket disclosed in the present invention;

[0037] Fig.16 This is the sixth structural schematic diagram of a ball clamp fixing mechanism of a rear bracket of an automobile disclosed in the present invention.

[0038] Description of reference numerals:

[0039] 1. front cover of ball clamp casting; 11. first groove; 2. back cover of ball clamp casting; 21. first material reduction groove; 22. second groove; 3. connecting sleeve; 31. first annular recess; 32. limiting recess; 4. locking block assembly; 5. lock core; 51. handle; 52. "L"-shaped limiting hole; 53. second annular recess; 54. limiting part; 6. connecting column; 61. first through hole; 62. limiting protrusion; 63. accommodating groove; 7. gap; 8. elastic member; 9. first connecting assembly; 10. steel ball; 100. limiting rod; 110. second lock core; 111. cover plate; 112. key. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure is described in detail, clearly and completely in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not used to limit the present disclosure.

[0041] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0042] Please refer to Figure 1 to Figure 5 As shown, a ball clamp fixing mechanism for a rear bracket of an automobile comprises a ball clamp casting front cover 1, a ball clamp casting rear cover 2 and a first connecting component 9, wherein the first connecting component 9 is used to connect the automobile, the first end of the ball clamp casting front cover 1 is hinged with the first end of the ball clamp casting rear cover 2, the second end of the ball clamp casting front cover 1 is detachably connected with the second end of the ball clamp casting rear cover 2, the ball clamp casting front cover 1 is provided with a first groove 11, the ball clamp casting rear cover 2 is provided with a second groove 22, and after the ball clamp casting front cover 1 and the ball clamp casting rear cover 2 are covered, the first groove 11 and the second groove 22 are enclosed to form a mounting bracket. The first connecting component 9 is at least partially located in the installation groove, and the second connecting component is arranged on the rear cover 2 of the ball clamp casting, and the second connecting component includes a lock core 5 and a connecting piece, and the lock core 5 is partially arranged in the connecting piece; the second connecting component includes a locked state and an unlocked state. When the second connecting component is in the locked state, the second connecting component is unlocked by adjusting the relative position of the lock core 5 in the connecting piece. After the second connecting component is unlocked, it is used to connect the bracket. In this way, there is no need to use tools to connect the bracket to the car or remove the bracket from the car, which provides greater convenience for users. It should be noted that the prior art part about the ball clamp casting front cover 1, the ball clamp casting rear cover 2 and the first connecting component 9 will not be repeated here.

[0043] Please also refer to Figure 7-Figure 8 As shown, Figure 14-15As shown, in one embodiment of the present disclosure, the connecting member includes a connecting sleeve 3 and a connecting column 6, the connecting column 6 is arranged above the ball clamp casting back cover 2 and is integrally formed with the ball clamp casting back cover 2, the connecting sleeve 3 is sleeved on the outside of the connecting column 6, the connecting column 6 is a hollow structure, the lock core 5 is partially arranged in the hollow structure, the lock core 5 is movably connected to the connecting column 6, when the second connecting component is in a locked state, the connecting sleeve 3 cannot be removed from the connecting column 6, by adjusting the relative position of the lock core 5 in the connecting column 6, the connecting sleeve 3 can be removed from the connecting column 6, and the second connecting component is unlocked. The connecting sleeve 3 is welded to the bracket, and a slot is usually provided on the bracket, and the connecting sleeve 3 is welded in the slot. It should be noted that the first lock core 5 can be inserted from the top of the connecting column 6 or from the bottom of the connecting column 6. The present disclosure is explained by inserting the first lock core 5 from the top of the connecting column 6. It should be noted that the bracket in the present disclosure is installed at the rear of the car and can be used to connect objects including but not limited to bicycles, motorcycles, luggage racks, luggage boxes, etc.

[0044] Further, such as Figure 4 , Figure 11 to Figure 13 As shown, a limiting rod 100 and two first through holes 61 are provided on the connecting column 6, the two first through holes 61 are arranged opposite to each other, and the limiting rod 100 passes through the two first through holes 61. Two "L"-shaped limiting holes 52 are provided on the lock core 5, the two "L"-shaped limiting holes 52 are arranged opposite to each other, and the limiting rod 100 passes through the two "L"-shaped limiting holes 52. When the second connecting component is in a locked state, the lock core 5 is rotated and pressed, and the second connecting component is unlocked. Specifically, the "L"-shaped limiting hole 52 includes a transverse hole and a longitudinal hole that are perpendicular and connected to each other. The limiting rod 100 is located in the transverse hole, and the lock core 5 is axially limited, and the lock core 5 cannot move up and down. The lock core 5 is rotated to allow the limiting rod 100 to enter the longitudinal hole. After the limiting rod 100 enters the longitudinal hole, the axial movement of the lock core 5 is no longer limited by the limiting rod 100. That is, the "L"-shaped limiting hole 52 and the limiting rod 100 are arranged to limit the lock core 5 axially to prevent the lock core 5 from moving up and down in the connecting column 6. Preferably, the limiting rod 100 is a bolt, and a receiving groove is arranged on the connecting column 6, wherein a first through hole 61 is arranged at the bottom of the receiving groove, and the head of the bolt is located in the receiving groove 63. The receiving groove 63 is actually equivalent to a countersunk hole, and the arrangement of the receiving groove 63 allows the head of the bolt to be sunk to the same level as or lower than the outer peripheral wall of the connecting column 6, otherwise it will affect the assembly of the connecting sleeve 3.

[0045] Please also see Fig.10As shown, further, three second through holes are provided on the connecting column 6, and the three second through holes are provided at the same height, and the three second through holes are evenly distributed along the circumferential direction of the connecting column 6, and the second through hole is located below the first through hole 61, and a steel ball 10 is provided in the second through hole, and the steel ball 10 can move in the second through hole. It can be understood that the number of steel balls 10 can also be four, and the specific number of steel balls 10 is not limited here. Two or more steel balls 10 are provided to better limit the axial position of the connecting sleeve 3, so that the second connecting assembly works more stably. The second through holes are evenly distributed along the circumferential direction of the connecting column 6, that is, the steel balls 10 are evenly distributed along the circumferential direction of the connecting column 6, so that when the steel balls 10 limit the axial position of the connecting sleeve 3, the force on the connecting sleeve 3 is more uniform, so as to avoid the long-term uneven force on the connecting sleeve 3 affecting the service life and working stability. A first annular recess 31 is provided on the inner circumferential wall of the connecting sleeve 3, and the position of the first annular recess 31 corresponds to the second through hole. A second annular recess 53 is provided on the outer circumferential wall of the lock core 5. The steel ball 10 can partially enter the first annular recess 31 and the second annular recess 53. After the connecting sleeve 3 is connected to the connecting column 6, the inner circumferential wall of the connecting sleeve 3 fits the outer circumferential wall of the connecting column 6. When the steel ball 10 partially enters the first annular recess 31, the steel ball 10 will limit the axial movement of the connecting sleeve 3, so that the connecting sleeve 3 cannot move up and down along the connecting column 6. At this time, the connecting sleeve 3 cannot be removed from the connecting column 6, and the second connecting assembly is in a locked state. Rotate the lock core 5 so that the limiting rod 100 enters the longitudinal hole, and then press the lock core 5. At this time, the limiting rod 100 no longer limits the axial position of the lock core 5. Press the lock core 5 to the bottom of the first channel. The position of the second annular recess 53 corresponds to the second through hole. When the steel ball 10 partially enters the second annular recess 53, at this time, the steel ball 10 no longer limits the axial position of the connecting sleeve 3. The connecting sleeve 3 can be removed from the connecting column 6, the second connecting assembly is unlocked, and the bracket can be connected.

[0046] In particular, the diameter of the second through hole on the outer peripheral wall of the connecting column 6 is d1, the diameter of the second through hole on the inner peripheral wall of the connecting column 6 is d2, and the diameter of the steel ball 10 is d0, d1 is less than d0, and d2 is greater than or equal to d0. If d1 is set too large, after removing the connecting sleeve 3, the steel ball 10 is easy to roll outward from the second through hole. d1 is less than d0, so that the steel ball 10 cannot completely escape from the second through hole, and at the same time, it does not affect a part of the steel ball 10 from entering the first annular recess 31 to limit the connecting sleeve 3. When installing the steel ball 10, the steel ball 10 is installed from one side of the inner peripheral wall of the connecting column 6 into the second through hole. d2 is greater than or equal to d0. On the one hand, it is convenient for the installation of the steel ball 10, and on the other hand, it also allows a part of the steel ball 10 to smoothly enter the second annular recess 53 to unlock the second connecting component.

[0047] It should be noted that the second annular concave 53 is an arc, and the arc is non-spherical. Specifically, the arc is composed of three curves, and the two curves located at the upper and lower openings are the first curve and the second curve, respectively. The curvature of the first curve and the second curve is small, and a third curve is arranged between the first curve and the second curve. The third curve connects the first curve and the second curve, so that the three become an arc, and the curvature of the third curve is large. Preferably, the curvature of the third curve is greater than the curvature of the steel ball 10, and the curvatures of the first curve and the second curve are equal, so that the opening of the arc is more rounded, which is convenient for the steel ball 10 to enter. The curvatures of the first curve and the second curve are small, and the curvature of the third curve is large, that is, the degree of curvature of the third curve is large, so that the steel ball 10 can easily partially enter the second annular concave 53, but cannot completely enter the second annular concave 53. In this way, when the lock core 5 slides up and down, the steel ball 10 can enter and exit the second annular concave 53 more smoothly, and the unlocking and locking of the second connecting component are also smoother, and there will be no jamming phenomenon. Furthermore, the depth of the second annular recess 53 is h, the radius of the steel ball 10 is r, and h is less than or equal to r. h is less than or equal to r so that when the second connecting component is in the unlocked state, only a portion of the steel ball 10 enters the second annular recess 53.

[0048] In one embodiment of the present disclosure, the hollow structure includes a first channel and a second channel that are interconnected, the diameter of the first channel is larger than the second channel, the lock core 5 is slidably connected in the first channel, an elastic member 8 is provided below the lock core 5, the elastic member 8 is used to reset the lock core 5, one end of the elastic member 8 is located in the second channel, and the other end of the elastic member 8 is in contact with the lock core 5. Specifically, the elastic member 8 is a spring, and the diameter of the second channel is adapted to the diameter of the spring, so that the second channel provides a storage space for the spring on the one hand and limits the spring on the other hand, so as to prevent the spring from deviating in the second channel when it is squeezed by the lock core 5. In addition, the diameter of the portion of the lock core 5 that is slidably connected to the first channel is larger than the caliber of the second channel. Since the caliber of the second channel is small, the lock core 5 cannot continue to slide down when it slides to the bottom of the first channel, so as to prevent the lock core 5 from sliding down too far. Preferably, a limiting portion 54 is provided at the bottom of the lock core 5, and the limiting portion 54 is used to limit the elastic member 8. Specifically, the limiting portion 54 is an annular limiting protrusion arranged at the bottom of the lock core 5, one end of the spring is located in the second channel, and the other end of the spring is located on the inner side of the annular limiting protrusion. The inner diameter of the annular limiting protrusion is substantially consistent with the diameter of the second channel. This allows the lock core 5 to be directly pressed downward without having to specifically align the spring so that the spring enters the inner side of the annular limiting protrusion, thereby making the operation more convenient.

[0049] Please see Figure 1 , Figure 2 , Fig. 9 and Fig.13As shown, in order to prevent the connection sleeve 3 from rotating in the circumferential direction and affecting the stability of the second connection assembly, two limiting protrusions 62 are evenly distributed on the outer peripheral wall of the connection column 6, and two limiting recesses 32 are provided on the connection sleeve 3. The limiting protrusions 62 cooperate with the limiting recesses 32 to limit the circumferential direction of the connection sleeve 3. Specifically, the end of the limiting protrusion 62 close to the rear cover 2 of the ball clamp casting is the tail, and the end away from the rear cover 2 of the ball clamp casting is the head. The limiting recess 32 is provided with an opening, and the end of the limiting recess 32 away from the opening is the bottom. The limiting recess 32 is trumpet-shaped, and the opening size of the limiting recess 32 is large and the bottom size is small, which is convenient for assembly. After the connection sleeve 3 is connected to the connection column 6, a gap 7 is provided between the head of the limiting protrusion 62 and the bottom of the limiting recess 32. Since the ball clamp fixing mechanism disclosed in the present invention is generally used outdoors, its surface or connection port will inevitably be splashed with attachments such as mud and sand. If there is no gap 7 between the head of the limiting protrusion 62 and the bottom of the limiting recess 32, that is, after the connection sleeve 3 is connected to the connection column 6, the head of the limiting protrusion 62 and the bottom of the limiting recess 32 are tightly fitted. If the bottom of the limiting recess 32 or the head of the limiting protrusion 62 is attached with mud and sand, it will affect the assembly of the connection sleeve 3 and the connection column 6, thereby affecting the reliability and stability of the ball clamp fixing mechanism. A gap 7 is set between the head of the limiting protrusion 62 and the bottom of the limiting recess 32. If the bottom of the limiting recess 32 or the head of the limiting protrusion 62 is attached with mud and sand, the foreign matter will be pushed to the gap 7 during the assembly of the connection sleeve 3 to the connection column 6. A slight external force is applied to vibrate the connection sleeve 3 or the connection column 6, and the foreign matter will fall off, which will not affect the assembly of the connection sleeve 3 and the connection column 6. It should be noted that the connecting sleeve 3 in the present disclosure can be applicable to various types of connecting columns 6, and it is only necessary to adapt the size of the connecting sleeve 3 to the size of the connecting column 6 during production.

[0050] Please see Figure 6 As shown, preferably, a handle 51 is provided at one end of the lock core 5 away from the rear cover 2 of the ball clamp casting. The handle 51 is provided to facilitate the user to rotate and press the lock core 5.

[0051] Please see Figure 6 As shown, the first end of the front cover 1 of the ball clamp casting is hinged with the first end of the rear cover 2 of the ball clamp casting, and the second end of the front cover 1 of the ball clamp casting and the second end of the rear cover 2 of the ball clamp casting are respectively provided with a first locking groove and a second locking groove, the first locking groove and the second locking groove are connected to each other, and the first locking groove and the second locking groove are used to connect the locking block assembly 4, and the locking block assembly 4 is used to connect the second end of the front cover 1 of the ball clamp casting with the second end of the rear cover 2 of the ball clamp casting. In order to reduce materials and save production costs, a plurality of first material reduction grooves 21 are provided on the rear cover 2 of the ball clamp casting, and a plurality of second material reduction grooves are provided on the front cover 1 of the ball clamp casting.

[0052] like Fig.16As shown, in one embodiment of the present disclosure, the ball clamp casting rear cover 2 is provided with a first mounting hole connected to the second groove 22, and the ball clamp casting rear cover 2 is connected with a locking assembly, and the locking assembly is used to put the lock block assembly 4 in a locked state, where the locked state means that the lock block assembly 4 cannot be operated, so as to prevent outsiders from opening the lock block assembly 4. The locking assembly includes a cover plate 111, a key 112, and a second lock core 110. The cover plate 111 is provided on a side of the ball clamp casting rear cover 2 away from the ball clamp casting front cover 1, and a second mounting hole is provided on the cover plate 111. The second lock core 110 passes through the second mounting hole and the first mounting hole in sequence, and a lock hole is provided on the second lock core 110. The key 112 is inserted into the lock hole, and the cover plate 111 can be removed, and then the lock block assembly 4 can be operated.

[0053] The present application is described in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the present application and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A ball clamp fixing mechanism for a rear bracket of an automobile, characterized in that: The invention comprises a ball clamp casting front cover (1), a ball clamp casting rear cover (2) and a first connecting component (9), wherein the ball clamp casting front cover (1) and the ball clamp casting rear cover (2) are detachably connected, and the first connecting component (9) is used to connect to a car, and the ball clamp casting front cover (1) is provided with a first groove (11), and the ball clamp casting rear cover (2) is provided with a second groove (22). After the ball clamp casting front cover (1) and the ball clamp casting rear cover (2) are covered, the first groove (11) and the second groove (22) enclose a mounting groove, and the first connecting component (9) is at least partially located in the mounting groove, and the ball clamp casting rear cover (2) is provided with a second connecting component, and the second connecting component comprises a lock core (5) and a connecting piece, and the lock core (5) is partially provided in the connecting piece, and the second connecting component is unlocked or locked by adjusting the relative position of the lock core (5) in the connecting piece.

2. The ball clamp fixing mechanism for the rear bracket of an automobile according to claim 1, characterized in that: The connecting piece includes a connecting sleeve (3) and a connecting column (6), wherein the connecting column (6) is integrally formed with the back cover (2) of the ball clamp casting, and the connecting sleeve (3) is sleeved on the outside of the connecting column (6). The connecting column (6) is a hollow structure, and the lock core (5) is partially arranged in the hollow structure. The lock core (5) is movably connected to the connecting column (6). When the second connecting component is in a locked state, the connecting sleeve (3) cannot be removed from the connecting column (6). By adjusting the relative position of the lock core (5) in the connecting column (6), the connecting sleeve (3) can be removed from the connecting column (6), and the second connecting component is unlocked.

3. The ball clamp fixing mechanism for the rear bracket of an automobile according to claim 2, characterized in that: The connecting column (6) is provided with at least one limiting protrusion (62), and the connecting sleeve (3) is provided with at least one limiting recess (32). The limiting protrusion (62) cooperates with the limiting recess (32) to limit the circumferential position of the connecting sleeve (3).

4. The ball clamp fixing mechanism for the rear bracket of an automobile according to claim 2, characterized in that: The connecting column (6) is provided with a limiting rod (100) and two first through holes (61), the two first through holes (61) are arranged opposite to each other, and the limiting rod (100) passes through the two first through holes (61); the lock core (5) is provided with two "L"-shaped limiting holes (52), the two "L"-shaped limiting holes (52) are arranged opposite to each other, and the limiting rod (100) passes through the two "L"-shaped limiting holes (52); when the second connecting component is in a locked state, the lock core (5) is rotated and pressed, and the second connecting component is unlocked.

5. The ball clamp fixing mechanism for the rear bracket of an automobile according to claim 2, characterized in that: At least two second through holes are arranged on the connecting column (6), the at least two second through holes are arranged at the same height, the at least two second through holes are evenly distributed along the circumferential direction of the connecting column (6), the second through hole is located below the first through hole (61), a steel ball (10) is arranged in the second through hole, and the steel ball (10) can move in the second through hole.

6. The ball clamp fixing mechanism for the rear bracket of an automobile according to claim 5, characterized in that: A first annular recess (31) is provided on the inner peripheral wall of the connecting sleeve (3), and the position of the first annular recess (31) corresponds to the second through hole. A second annular recess (53) is provided on the outer peripheral wall of the lock core (5); when the second connecting component is in a locked state, the second annular recess (53) is located above the second through hole, and the steel ball (10) is partially located in the first annular recess (31); when the second connecting component is in an unlocked state, the position of the second annular recess (53) corresponds to the second through hole, and the steel ball (10) is partially located in the second annular recess (53).

7. The ball clamp fixing mechanism for the rear bracket of an automobile according to claim 5, characterized in that: The diameter of the second through hole on the outer peripheral wall of the connecting column (6) is d1, the diameter of the second through hole on the inner peripheral wall of the connecting column (6) is d2, the diameter of the steel ball (10) is d0, d1 is less than d0, and d2 is greater than or equal to d0.

8. The ball clamp fixing mechanism for the rear bracket of an automobile according to claim 7, characterized in that: The depth of the second annular concave (53) is h, the radius of the steel ball (10) is r, and h is less than or equal to r.

9. The ball clamp fixing mechanism for a rear bracket of an automobile according to claim 2, characterized in that: The hollow structure comprises a first channel and a second channel which are interconnected, wherein the diameter of the first channel is larger than that of the second channel, and the lock core (5) is slidably connected in the first channel. An elastic member (8) is arranged below the lock core (5), and the elastic member (8) is used for resetting the lock core (5). One end of the elastic member (8) is located in the second channel, and the other end of the elastic member (8) abuts against the lock core (5).

10. The ball clamp fixing mechanism for the rear bracket of an automobile according to claim 9, characterized in that: A limiting portion (54) is provided at the bottom of the lock core (5), and the limiting portion (54) is used to limit the elastic member (8).

Images