A machine tool chuck connecting rod

Abstract

The utility model discloses a machine tool chuck connecting rod, including connecting rod, rod sleeve and antirotation cover, connecting rod is by the first external thread section, square shaft section, cylinder axle section, second external thread section integrated from left to right setting and is formed, and the first external thread section is fixed with chuck pull rod screw joint, the rod sleeve has the threaded hole and the guide hole of coaxial setting, and the rod sleeve right -hand integral forming is provided with pull rod, and the pull rod outer end fixedly seted up has the ball head, and the ball head has the through -hole, and the threaded hole bottom sliding installation has the touch switch and the power supply box, and the rod sleeve screw joint installation has the first bolt for the touch switch fixedly pressed. Since the length diameter size of second external thread section is less than the length diameter size of first external thread section, the tension shear force that second external thread section bears is less than first external thread section, and the total deformation of second external thread section always is before the deformation of first external thread section, thereby can avoid the problem that the connecting rod and pull rod appear difficult to disassemble caused by the deformation of first external thread section.

Description

Technical Field

[0001] This utility model belongs to the field of machining technology, and in particular relates to a machine tool chuck connecting rod. Background Technology

[0002] When switching between an eccentric chuck and a self-centering chuck, it is necessary to select a compatible connecting rod and tie rod for the bed hydraulic cylinder. Under long-term stress from tension and rotation, the threaded connection between the connecting rod and tie rod can deform, making disassembly difficult when switching between the eccentric and self-centering chucks. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a machine tool chuck connecting rod that can prevent deformation of the threaded section connecting the connecting rod and the tie rod, which would make disassembly difficult.

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: a machine tool chuck connecting rod, including a connecting rod, a rod sleeve and an anti-rotation sleeve;

[0005] The connecting rod is integrally formed from a first external thread section, a square shaft section, a cylindrical shaft section, and a second external thread section arranged from left to right. The first external thread section is screwed and fixed to the chuck rod.

[0006] The sleeve has a threaded hole and a guide hole arranged coaxially. A pull rod is integrally formed on the right end of the sleeve. A ball head is fixedly set on the outer end of the pull rod. The ball head has a through hole. A touch switch and a power supply box are slidably installed at the bottom of the threaded hole. A first bolt for pressing and fixing the touch switch is screwed onto the sleeve. An indicator light is fixedly installed on the outer wall of the sleeve. The touch switch and the indicator light are both connected to the power supply box circuit. A second external thread section is screwed into the threaded hole. The right end of the second external thread section abuts against the touch switch to make it actuate. A cylindrical shaft section is slidably installed in the through hole with clearance.

[0007] Axial guide strips are arranged in a ring array on the outer wall of the left end of the sleeve. Guide grooves that cooperate with the axial guide strips are arranged in a ring array on the anti-rotation sleeve. A square hole that cooperates with the square shaft section is provided at the left end of the anti-rotation sleeve. The anti-rotation sleeve is slidably installed on the sleeve. The guide grooves are slidably engaged with the axial guide strips. The square hole can be slidably sleeved on the square shaft section. A second bolt for limiting and fixing it to the sleeve is screwed on the anti-rotation sleeve.

[0008] The length of the first external thread segment is 1.2-1.8 times the length of the second external thread segment, and the diameter of the first external thread segment is 1.5-2 times the diameter of the second external thread segment.

[0009] Preferably, four axial guide bars are arranged in a circular array on the outer wall of the left end of the sleeve.

[0010] Preferably, the ball head is also provided with a countersunk threaded hole that communicates with its connecting hole.

[0011] Preferably, the sleeve is provided with a stop blind hole that mates with the second bolt.

[0012] Compared with the prior art, the advantages of this utility model are as follows: Since the length and diameter of the second external thread segment are both smaller than those of the first external thread segment, the tensile and shear forces borne by the second external thread segment are less than those of the first external thread segment. The deformation of the second external thread segment always occurs before the deformation of the first external thread segment, thus avoiding the problem of difficulty in disassembling the connecting rod and the tie rod caused by the deformation of the first external thread segment. Before the deformation of the second external thread segment, it presses against the touch switch to activate it, and the indicator light remains green. After the deformation of the second external thread segment, it can no longer press against the touch switch to activate it, and the indicator light goes out, facilitating maintenance and repair for the user. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings.

[0014] Figure 1 This is a diagram of the internal structure of this utility model.

[0015] Figure 2 This is the front view of the connecting rod. Detailed Implementation

[0016] The present invention will now be described in detail with reference to specific embodiments:

[0017] like Figure 1 and Figure 2 The machine tool chuck connecting rod shown includes a connecting rod, a rod sleeve 2, and an anti-rotation sleeve 5;

[0018] The connecting rod is integrally formed from a first external thread section 11, a square shaft section 12, a cylindrical shaft section 13, and a second external thread section 14 arranged from left to right. The first external thread section 11 is screwed and fixed to the chuck rod.

[0019] The sleeve 2 has a threaded hole 20 and a guide hole 25 arranged coaxially. A pull rod 21 is integrally formed on the right end of the sleeve 2. A ball head 22 is fixedly set on the outer end of the pull rod 21. The ball head 22 has a through hole. A touch switch 3 and a power supply box 6 are slidably installed at the bottom of the threaded hole 20. A first bolt 31 for pressing and fixing the touch switch 3 is screwed onto the sleeve 2. An indicator light 4 is fixedly installed on the outer wall of the sleeve 2. The touch switch 3 and the indicator light 4 are both connected to the power supply box 6. A second external thread section 14 is screwed into the threaded hole 20. The right end of the second external thread section 14 abuts against the touch switch 3 to make it move. A cylindrical shaft section 13 is slidably installed in the through hole with clearance.

[0020] Axial guide bars 24 are arranged in a ring array on the outer wall of the left end of the rod sleeve 2. Four axial guide bars 24 are arranged in a ring array on the outer wall of the left end of the rod sleeve 2. The anti-rotation sleeve 5 is provided with guide grooves that cooperate with the axial guide bars 24 in a ring array. The left end of the anti-rotation sleeve 5 is provided with a square hole that cooperates with the square shaft section 12. The anti-rotation sleeve 5 is slidably installed on the rod sleeve 2. The guide grooves are slidably fastened to the axial guide bars 24. The square hole is slidably sleeved on the square shaft section 12. A second bolt 51 for limiting and fixing it to the rod sleeve 2 is screwed on the anti-rotation sleeve 5.

[0021] The length of the first external thread segment 11 is 1.2-1.8 times the length of the second external thread segment 14, and the diameter of the first external thread segment 11 is 1.5-2 times the diameter of the second external thread segment 14.

[0022] The ball head 22 is also provided with a countersunk threaded hole 23 that communicates with its connection hole. The rotating head of the hydraulic cylinder piston rod is connected and fixed in the countersunk threaded hole 23 by screwing, which can improve the stability of the rotating head installed in the ball head 22.

[0023] The sleeve 2 is provided with a stop blind hole that cooperates with the second bolt 51. The inner end of the second bolt 51 is embedded in the stop blind hole, which can better restrict the anti-rotation sleeve 5 from sliding relative to the sleeve 2 along the axial guide strip 24, and has the advantage of higher stability in use.

[0024] After the connecting rod, sleeve 2, and anti-rotation sleeve 5 are assembled and fixed, the square hole of the anti-rotation sleeve 5 is slidably fitted onto the square shaft section 12 to restrict the relative rotation of the connecting rod and sleeve 2. The guide groove and the axial guide strip 24 cooperate to restrict the relative rotation of the anti-rotation sleeve 5 and sleeve 2. The first external thread section 11 is screwed and fixed to the chuck pull rod. The ball head 22 is connected and fixed to the rotating head of the hydraulic cylinder piston rod. To facilitate charging of the power supply box 6, a charging interface connected to the power supply box 6 circuit can be provided on the sleeve 2.

Claims

1. A machine tool chuck connecting rod, characterized in that: Includes connecting rod, rod sleeve (2) and anti-rotation sleeve (5); The connecting rod is integrally formed from the first external thread section (11), the square shaft section (12), the cylindrical shaft section (13), and the second external thread section (14) arranged from left to right. The first external thread section (11) is screwed and fixed to the chuck rod. The sleeve (2) has a threaded hole (20) and a guide hole (25) arranged coaxially. A pull rod (21) is integrally formed on the right end of the sleeve (2). A ball head (22) is fixedly provided on the outer end of the pull rod (21). The ball head (22) has a through hole. A touch switch (3) and a power supply box (6) are slidably installed at the bottom of the threaded hole (20). A first bolt (31) for pressing and fixing the touch switch (3) is screwed onto the sleeve (2). An indicator light (4) is fixedly installed on the outer wall of the sleeve (2). The touch switch (3) and the indicator light (4) are both connected to the power supply box (6) in the circuit. The second external thread section (14) is screwed into the threaded hole (20). The right end of the second external thread section (14) abuts against the touch switch (3) to make it move. The cylindrical shaft section (13) is slidably installed in the through hole with gap. Axial guide strips (24) are arranged in a ring array on the outer wall of the left end of the sleeve (2). A guide groove that matches the axial guide strips (24) is arranged in a ring array on the anti-rotation sleeve (5). A square hole that matches the square shaft section (12) is provided at the left end of the anti-rotation sleeve (5). The anti-rotation sleeve (5) is slidably installed on the sleeve (2). The guide groove is slidably fastened on the axial guide strips (24). The square hole can be slidably sleeved on the square shaft section (12). A second bolt (51) for limiting and fixing it on the sleeve (2) is screwed on the anti-rotation sleeve (5). The length of the first external thread segment (11) is 1.2-1.8 times the length of the second external thread segment (14), and the diameter of the first external thread segment (11) is 1.5-2 times the diameter of the second external thread segment (14).

2. The machine tool chuck connecting rod according to claim 1, characterized in that: The axial guide strips (24) are arranged in a ring array on the outer wall of the left end of the sleeve (2). There are four of them.

3. The machine tool chuck connecting rod according to claim 1, characterized in that: The ball head (22) is also provided with a countersunk threaded hole (23) that communicates with its connecting hole.

4. The machine tool chuck connecting rod according to claim 1, characterized in that: The sleeve (2) is provided with a stop blind hole that cooperates with the second bolt (51).

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