Disclosure of Invention
The invention aims to provide a pull rod connecting structure which is reliable in connection and convenient to assemble and disassemble.
In order to achieve the above purpose, the invention provides a pull rod connecting structure, which comprises a first connecting rod, a second connecting rod, a first connecting block, a second connecting block and a sleeve, wherein a first connecting joint is arranged at the end part of the first connecting rod; the end part of the second connecting rod is provided with a second connector which is in butt joint with the first connector; the first end of the first connecting block is provided with a first inner stop and a first outer stop, and the second end of the first connecting block is provided with a second inner stop; the first end of the second connecting block is provided with a third inner stop and a second outer stop, the second end of the second connecting block is provided with a fourth inner stop, the first connecting block and the second connecting block are oppositely connected to the outer sides of the first connecting head and the second connecting head, the first inner stop and the third inner stop are used for limiting the first connecting head to move away from the second connecting head, and the second inner stop and the fourth inner stop are used for limiting the second connecting head to move away from the first connecting head; the sleeve is sleeved on the outer sides of the first connecting block and the second connecting block, the first end of the sleeve is respectively adjacent to the first outer stop and the second outer stop, and the first connecting block or the second connecting block is connected with a locking piece for limiting the sleeve to move away from the first outer stop.
According to the scheme, the first connecting block and the second connecting block are arranged to wrap the first connecting head and the second connecting head, so that the first connecting rod and the second connecting rod are connected; the sleeve is sleeved outside the first connecting block and the second connecting block and used for limiting the separation of the first connecting block and the second connecting block, so that the first connecting rod and the second connecting rod are firmly connected; the first outer stop, the second outer stop and the locking piece are arranged and used for locking the sleeve position and preventing the sleeve from being accidentally loosened. The first connecting rod and the second connecting rod do not need to be connected through threads, can bear larger external force, cannot be easily loosened, and have the advantages of reliable connection and convenience in assembly and disassembly.
The further scheme is that a first mounting hole is formed in the first connecting block, and/or a second mounting hole is formed in the second connecting block; the sleeve is provided with a third mounting hole which is communicated with the first mounting hole or the second mounting hole, and the locking piece penetrates through the third mounting hole to be connected in the first mounting hole or the second mounting hole.
According to the scheme, the locking piece can penetrate through the third mounting hole to be connected in the first mounting hole or the second mounting hole by arranging the third mounting hole, the first mounting hole and the second mounting hole, so that unexpected loosening of the sleeve is avoided, and the sleeve is prevented from rotating around the axis of the sleeve relative to the connecting block.
Further, the third mounting hole is arranged at the second end of the sleeve, the third mounting hole is formed into a U-shaped hole, and the third mounting hole is opened towards the end part of the second end of the sleeve.
By the scheme, through setting up the opening, make things convenient for third mounting hole and locking piece to align fast, make things convenient for locking piece fast.
Further, in the axial direction, a first preset distance is arranged between the first inner stop and the second inner stop, a second preset distance is arranged between the third inner stop and the fourth inner stop, and the first preset distance is equal to the second preset distance; the first preset distance and the second preset distance are both larger than or equal to the sum of the thicknesses of the first connector and the second connector.
Further, when the first preset distance and the second preset distance are both larger than the sum of the thicknesses of the first connector and the second connector, a soft adhesive layer is arranged between the first connector and the second connector.
By the scheme, through setting up the soft glue film, both convenient connection installation can prevent again that head rod and second connecting rod from rocking back and forth in the axial.
The further scheme is that the first outer stop is protruded on the outer peripheral wall of the first connecting block, the second outer stop is protruded on the outer peripheral wall of the second connecting block, and the protrusion height of the first outer stop and the protrusion height of the second outer stop are equal to the thickness of the sleeve.
According to the scheme, the protruding height of the first outer stop and the protruding height of the second outer stop are equal to the thickness of the sleeve, so that the outer surface of the sleeve is in smooth transition with the first outer stop and the second outer stop.
The first inner stop and the third inner stop are oppositely arranged and form a first through hole, the second inner stop and the fourth inner stop are oppositely arranged and form a second through hole, the first through hole and the second through hole are coaxially arranged, and the diameter of the first through hole is equal to that of the second through hole.
According to the scheme, when the diameters of the first through holes and the second through holes are equal, the first connecting rod and the second connecting rod with the same specification can be connected.
The first inner stop and the third inner stop are oppositely arranged and form a first through hole, the second inner stop and the fourth inner stop are oppositely arranged and form a second through hole, the first through hole and the second through hole are coaxially arranged, and the diameter of the first through hole is unequal to the diameter of the second through hole.
According to the scheme, when the diameters of the first through holes and the second through holes are unequal, the first connecting rods and the second connecting rods with different specifications can be connected.
The outer diameter of the first connecting block gradually decreases from one end of the first connecting block, which is close to the first outer stop, to the other end of the first connecting block, and the outer diameter of the second connecting block gradually decreases from one end of the second connecting block, which is close to the second outer stop, to the other end of the second connecting block; the inner diameter of the sleeve gradually reduces from the first end to the second end, and the inner peripheral wall of the sleeve is matched with the outer peripheral wall of the first connecting block and the outer peripheral wall of the second connecting block respectively.
By the scheme, through setting up the peripheral wall respectively with the peripheral wall cooperation of first connecting block and second connecting block, make things convenient for sleeve and first connecting block and second connecting block zonulae occludens, prevent that first connecting block and second connecting block from rocking on radial, and then avoid first connecting rod and second connecting rod to remove at radial dislocation, ensure the axiality of both.
Detailed Description
First embodiment of the tie rod connection structure:
referring to fig. 1 to 6, the present embodiment provides a pull rod connecting structure, which can be used for butt joint of rods, for example, butt joint of a driving rod of an air cylinder or a hydraulic cylinder and a connecting rod of an executing component. The pull rod connecting structure comprises a first connecting rod 1, a second connecting rod 2, a first connecting block 3, a second connecting block 4 and a sleeve 5, wherein the first connecting rod 1 is a driving rod of an air cylinder or a hydraulic cylinder, the second connecting rod 2 is a connecting rod of an executing component, and other parts of the executing component are omitted in the figure. Of course, the first connecting rod 1 may be a connecting rod of another component.
The end of the first connecting rod 1 is provided with a first connecting head 11, the axial cross section of the first connecting head 11 being T-shaped or i-shaped, the latter being preferred in this embodiment.
The end of the second connecting rod 2 is provided with a second connector 21, and the axial section of the second connector 21 is in a shape of T or I, and the former is preferred in the embodiment. The second connector 2 is coaxially butted with the first connector 11.
The transverse cross section of the first connecting block 3 is semicircular, a first end of the first connecting block 3 is provided with a first inner stop 31 and a first outer stop 32, a second end of the first connecting block 3 is provided with a second inner stop 33, the first inner stop 31 and the second inner stop 33 are correspondingly arranged on the inner side of the first connecting block 3 along the axial direction, a first preset distance is reserved between the first inner stop 31 and the second inner stop 33, a first accommodating cavity 34 is formed in the first inner stop 33, and a second outer stop 42 is arranged on the outer side of the first connecting block 3.
The transverse cross section of the second connecting block 4 is semicircular, a third inner stop 41 and a second outer stop 42 are arranged at the first end of the second connecting block 4, a fourth inner stop 43 is arranged at the second end of the second connecting block 4, the third inner stop 41 and the fourth inner stop 43 are correspondingly arranged on the inner side of the second connecting block 4 along the axial direction, a second accommodating cavity 44 is arranged between the third inner stop 41 and the fourth inner stop 43 at a second preset distance, the second accommodating cavity 44 is communicated with the first accommodating cavity 34, and the second outer stop 42 is arranged on the outer side of the second connecting block 4.
The second connector 21 is coaxially butted with the first connector 11. The first connecting block 3 and the second connecting block 4 are oppositely arranged and wrapped outside the first connecting head 11 and the second connecting head 21. The first connector 11 and the second connector 21 are both disposed in the first accommodation chamber 34 and the second accommodation chamber 44. The first inner stop 31 and the third inner stop 41 are used for limiting the first connector 11 to move away from the second connector 21 and preventing the first connector 11 from being separated from the first connector block 3 and the second connector block 4; the second inner stop 33 and the fourth inner stop 43 are used for limiting the movement of the second connector 21 away from the first connector 11, and preventing the second connector 21 from being separated from the first connector 3 and the second connector 4.
The sleeve 5 is sleeved on the outer sides of the first connecting block 3 and the second connecting block 4, the first end of the sleeve 5 is respectively adjacent to the first outer stop 32 and the second outer stop 42, preferably is in abutting connection, and the first connecting block 3 or the second connecting block 4 is connected with a locking piece 6, wherein the locking piece 6 is used for limiting the sleeve 5 to move away from the first outer stop 32. Specifically:
in an embodiment, the second connecting block 4 is provided with a second mounting hole 45, preferably on the second end of the second connecting block 4, and for convenience in drilling the second mounting hole 45, the second end of the second connecting block 4 is further provided with a platform 46, the platform 46 is recessed in the peripheral wall of the second connecting block 4, and the second mounting hole 45 is disposed on the platform 46. The second mounting hole 45 is preferably a threaded hole, the locking member 6 is connected in the second mounting hole 45, the locking member 6 is preferably a screw, and one end of the locking member 6 protrudes out of the second mounting hole 45.
In another embodiment, the first connecting block 3 is provided with a first mounting hole, preferably a threaded hole, on the second end of the first connecting block 4, the locking member 6 is connected in the first mounting hole (not shown in the figure), the locking member 6 is preferably a screw, and one end of the locking member 6 protrudes out of the first mounting hole.
The locking member 6 is disposed at the second end of the sleeve 5, and the locking member 6 is only required to be connected to the first mounting hole or the second mounting hole 45.
Correspondingly, a third mounting hole 51 is formed in the sleeve 5, preferably on the second end of the sleeve 5, the third mounting hole 51 is communicated with the first mounting hole or the second mounting hole 45, and the locking member 6 passes through the third mounting hole 51 to be connected in the first mounting hole or the second mounting hole 45. The locking member 6 is provided to prevent the sleeve 5 from moving in the axial direction and to restrict the sleeve 5 from rotating about its axis to the first connecting block 3 or the second connecting block 4. The first mounting hole is set to be a U-shaped hole, and the opening is set towards the second end of the sleeve 5 to the first mounting hole, so that the locking piece 6 can be conveniently and quickly embedded into the third mounting hole 51.
In fig. 4, a first preset distance is spaced between the first inner stopper 31 and the second inner stopper 33, and a second preset distance is spaced between the third inner stopper 41 and the fourth inner stopper 43 in the axial direction, wherein the first preset distance is equal to the second preset distance. The first preset distance and the second preset distance are both greater than or equal to the sum of the thicknesses of the first connector 11 and the second connector 21.
When the first preset distance and the second preset distance are equal to the sum of the thicknesses of the first connector 11 and the second connector 21, the first connector 11 and the second connector 21 can be just fixed by the first connector 3 and the second connector 4, and the first connector 11 and the second connector 21 are prevented from moving relatively close to or relatively far away from each other.
When the first preset distance and the second preset distance are both greater than the sum of the thicknesses of the first connector 11 and the second connector 21, a soft adhesive layer may be disposed between the first connector 11 and the second connector 21, and the soft adhesive layer may be rubber or silica gel. When the first connecting block 3 and the second connecting block 4 are installed, the first connecting head 11 and the second connecting head 21 can squeeze the soft adhesive layer, so that the two can be ensured to move relatively close to or relatively far away from each other.
The first outer stop 32 protrudes from the outer peripheral wall of the first connecting block 3, the second outer stop 42 protrudes from the outer peripheral wall of the second connecting block 4, and the protruding height of the first outer stop 32 and the protruding height of the second outer stop 42 are equal to the thickness of the sleeve 5, so that the first outer stop 32, the second outer stop 42 and the outer Zhou Bishun of the sleeve 5 slide and transition.
The first inner stop 31 is disposed opposite to the third inner stop 41 and forms a first through hole 7a, and the second connecting rod 2 is disposed in the first through hole 7 a; the second inner stopper 33 is disposed opposite to the fourth inner stopper 43 and forms a second through hole 8a, the first through hole 7a is disposed coaxially with the second through hole 8a, and the first connecting rod 1 is disposed in the second through hole 8 a.
In the present embodiment, the diameter of the first through hole 7a is equal to the diameter of the second through hole 8a, that is, the diameter of the first connecting rod 1 is equal to the diameter of the second connecting rod 2.
Second embodiment of tie rod connection structure:
referring to fig. 7, on the basis of the first embodiment of the pull rod connecting structure, the diameter of the first through hole 7b is not equal to the diameter of the second through hole 8b, and the diameter of the first through hole 7b is smaller than the diameter of the second through hole 8b in this embodiment. Correspondingly, the diameter of the second connecting rod 2 is smaller than the diameter of the first connecting rod 1.
Third embodiment of tie rod connection structure:
referring to fig. 8, in the first embodiment of the pull rod connecting structure, the outer diameter of the first connecting block 3 is gradually reduced from one end thereof close to the first outer stopper 32 to the other end thereof, the outer diameter of the second connecting block 4 is gradually reduced from one end thereof close to the second outer stopper 42 to the other end thereof, and the reduction ratio of the first connecting block 3 is the same as that of the second connecting block 4.
The inner diameter of the sleeve 5 is gradually reduced from the first end to the second end, and the inner peripheral wall of the sleeve 5 is respectively matched with the outer peripheral wall of the first connecting block 3 and the outer peripheral wall of the second connecting block 4. The sleeve 5 is sleeved from the smaller end of the first connecting block 3 and the second connecting block 4, the deeper the sleeve 5 is sleeved, the more tightly the sleeve 5 is connected with the first connecting block 3 and the second connecting block 4, on one hand, the locking of the first connecting block 3 and the second connecting block 4 is facilitated, the shaking of the first connecting block 3 and the second connecting block 4 is prevented, on the other hand, the function of temporarily fixing the sleeve 5 can be achieved, and the locking piece 6 is installed and screwed conveniently.
In summary, the first connecting block and the second connecting block are arranged to wrap the first connecting head and the second connecting head, so that the first connecting rod and the second connecting rod are connected; the sleeve is sleeved outside the first connecting block and the second connecting block and used for limiting the separation of the first connecting block and the second connecting block, so that the first connecting rod and the second connecting rod are firmly connected; the first outer stop, the second outer stop and the locking piece are arranged and used for locking the sleeve position and preventing the sleeve from being accidentally loosened. The first connecting rod and the second connecting rod do not need to be connected through threads, can bear larger external force, cannot be easily loosened, and have the advantages of reliable connection and convenience in assembly and disassembly.
Finally, it should be emphasized that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention, but rather that various changes and modifications can be made by those skilled in the art without departing from the spirit and principles of the invention, and any modifications, equivalent substitutions, improvements, etc. are intended to be included within the scope of the present invention.